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Tytuł:
Genetic diversity and relationship of Hunan province of China local tree peonies based on SSR markers
Autorzy:
Zhang, M.-H.
Jin, X.-L.
Wen, Y.-F.
Shen, S.
Wen-Xing
Wu, S.
Lu, J.-H.
Ye-Ye
Powiązania:
https://bibliotekanauki.pl/articles/12665369.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
China
Hunan Province
plant cultivation
tree peony
Paeonia suffruticosa
ornamental plant
genetic diversity
genetic relationship
SSR marker
Opis:
Paeonia sect. Moutan is a wide known ornamental plant in the world. The objective of this study was to provide the theoretical basis for scientific preservation and utilization of tree peony resources of Hunan province of China. Simple sequence repeat (SSR) markers were applied to reveal the genetic diversity and relationship of 21 tree peony resources and 45 domestic and foreign tree peony cultivars. Clear bands, the size of which ranged from 115 bp to 379 bp, were detected with 14 primers. In total, 90 alleles were detected and the number of alleles detected with one primer varied between 5 and 13; the number of effective alleles ranged from 1.183 to 2.070; the polymorphism ratio of each locus was 100%. The observed heterozygosity, which ranged from 0.120 to 0.851 with an average of 0.532, was larger than the expected one, which ranged from 0.090 to 0.470 with an average of 0.300. Shannon index ranged from 0.137 to 0.695 and fixation index ranged from −0.332 to −0.869. The results show abundant genetic diversity in tree peony of Hunan province and SSR markers distinguishing homonymous tree peony resources successfully.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 4; 213-223
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
THE FALL OF BYZANTINE EMPIRE BY FR. TIKHON AND ITS CHINESE TRANSLATION
Autorzy:
Ye, Lina
Powiązania:
https://bibliotekanauki.pl/articles/603737.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Rusycystyczne
Opis:
Publicystyczny film Upadek imperium. Lekcja Bizancjum wywołał burzliwą reakcjęspołeczną. Mówiący o określonej historycznej lekcji, film ten wyraźnie odsyła dowspółczesnej sytuacji Rosji, przeciwstawiając ten kraj reszcie cywilizowanegoświata. W artykule została przeprowadzona porównawcza analiza oryginalnego scenariuszafilmu i jego chińskiego przekładu, zmierzająca do ukazania kontekstualnegocharakteru relacji między przekładem i oryginalnym tekstem. Wykorzystującteorię przekładu wypracowaną przez Michela Foucaulta, autorka opisuje przekładjako proces produkcji dyskursu. Badając nacechowanie stylistyczne wypowiedzi narratoraoraz wprowadzonych przez tłumacza zmiany w zakresie zjawisk językowychi kulturowych, autorka dochodzi do wniosku, że chiński przekład jest daleki odneutralności i odgrywa wyraźną rolę polityczną. Świadomie zaciera on aluzja dowspółczesnej polityki Rosji, zmierzając do tego, by chińscy widzowie wyciągnęli„własne” wnioski wynikające z upadku Bizancjum, czy dokładniej: z upadku ZwiązkuRadzieckiego. Przekład wysuwa na pierwszy plan te elementy, które odpowiadająoficjalnej chińskiej ideologii państwowej, redukując te, które nie byłyby tolerowaneprzez chińską cenzurę.
Źródło:
Przegląd Rusycystyczny; 2017, 1
0137-298X
Pojawia się w:
Przegląd Rusycystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel base strain sensitivity measurement system with steady harmonic excitation
Autorzy:
Ye, Chuwei
Powiązania:
https://bibliotekanauki.pl/articles/2173901.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
base strain sensitivity
piezoelectric accelerometer
steady harmonic excitation
calibration
Opis:
Considering the low accuracy and low efficiency of the traditional calibration method for base strain sensitivity of accelerometers, a novel base strain sensitivity calibration system with steady harmonic excitation is proposed. The required cantilever beam for calibration is driven by an electromagnetic exciter to generate a base strain varying in a steady harmonic pattern. By applying a Wheatstone bridge circuit, the generated strain with low distortion can be measured. The measurement system with a compensation function can automatically calibrate the base strain sensitivity. The amplitude linearity and frequency response characteristics of the base strain sensitivity in two accelerometers are obtained experimentally, and the uncertainty in the results is 2% ( = 2).
Źródło:
Metrology and Measurement Systems; 2022, 29, 4; 751--762
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of low frequency vibrations on drillstring dynamics
Autorzy:
Chernova, M, YE
Powiązania:
https://bibliotekanauki.pl/articles/299143.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
drilling
well
vibrations
Opis:
During the drilling process, between the drilling bit that ruins the rock in the bottom-hole and the energy source located on the ground surface is the drillstring that has certain length and small cross cuts that define the dynamics of the drilling bit work. Along with the development of science, for optimization of drilling processes were developed and continue to be elaborated mathematical models that use empirical dependencies based mainly on laboratory data which are very far away from the real conditions of well construction and fail to take into account all the peculiarities of this process. Thus, the management of the drillstring dynamics related to an increase in the effectiveness of deep directional and horizontal wells drilling process through the minimization of torsional and longitudinal Iow frequency vibrations of drilling instrument is a matter of topical interest nowadays.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 3; 423-430
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peculiarities of primary psychological care, counseling and psychotherapy in conditions of war
Autorzy:
Falova, Olena Ye.
Powiązania:
https://bibliotekanauki.pl/articles/28763585.pdf
Data publikacji:
2023-08-29
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
martial law
rehabilitation
psychotherapist
post-traumatic syndrome
population
victims
Opis:
The relevance of the investigated problem lies in the need to provide primary psychological assistance to military personnel and other victims of the Russo-Ukrainian war at its current stage, because psychological problems are occurring in an increasing number of people, in particular in the territory of Kharkiv and Zaporizhzhia. The purpose of the article is to determine the specifics and stages of providing psychological assistance, as well as consultations to victims of the war, primarily to the populations of Kharkiv and Zaporizhzhia, which are located within the war zone. In the course of the research, a set of methods was used, namely analytical, graphic and synthesis methods. The main results of the conducted research should be considered the established features of providing assistance to the affected part of the population, which was at the epicentre of combat events in the Kharkiv and Zaporizhzhia Oblasts, as well as specific actions that prevent the deterioration of a person’s psychological state during the war. Identified were the factors needed to provide psychological assistance for thevarious population specifics, taking into account aspecvts such as gender, age, as well as the person’s degree of psychological deterioration. The practical significance of the results of this academic paper lies in the development of an algorithm of actions for providing psychological assistance to Ukrainians during the state of war in the country, as well as conducting the necessary actions and consultations to improve the psychological state of the population affected by the war from specific cities. The results of the study can be used as an example to provide consultations and conduct to the population of other regions of Ukraine and beyond in real time. In addition, the results can be a helpful tool for establishing recommendations for improving mental health in conditions of war.
Źródło:
Acta Neuropsychologica; 2023, 21(3); 333-350
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Edukacja muzyczna na etapie wyższego szkolnictwa w Polsce i Chinach – propozycja badań komparatystycznych
Autorzy:
DYMON, MIROSŁAW
YE, ZI
Powiązania:
https://bibliotekanauki.pl/articles/457460.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Rzeszowski
Tematy:
edukacja muzyczna
szkolnictwo wyższe
Polska
Chiny
komparatystyka
education
higher education
Polska
China
comparison
Opis:
Music Education at the Stage of Higher Education in Poland and China – the Suggestion for a Comparative Research
Źródło:
Edukacja-Technika-Informatyka; 2019, 10, 3; 74-79
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Application of Quest Technologies in Teaching Students of IT Specialties
Autorzy:
Levus, Ye.
Sivets, O.
Powiązania:
https://bibliotekanauki.pl/articles/411116.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
quest
teamwork
group dynamic
software engineering
quest plan
information technologies
Opis:
The quest is analyzed as an innovative learning method that provides the development of creativity, cognitive flexibility, emotional intelligence of a person and meets teamwork that is especially important for IT professionals. The components and stages of quest-technology application are described. It is noted that the quest, in addition to the knowledge gained, gives students an understanding of the processes of group dynamics, behavioral patterns in the system of interpersonal relations. A quest-plan that has been developed can be used as a template for building quests. The example of components of the developed quest for students of the specialty Software Engineering with the specified features of each component is given. The proposed example can be used as a recommendation for constructing quests.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2019, 8, 2; 55-60
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The approach of granular computing and rough sets for identifying situations
Autorzy:
Burov, Ye.
Mykich, K.
Powiązania:
https://bibliotekanauki.pl/articles/411410.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
situation
situational awareness system
ontology
situational assessment
granular computing
rough sets theory
koniunktura
system świadomości sytuacji
ontologia
ocena sytuacji
obliczenia ziarniste
teoria zbiorów przybliżonych
Opis:
In the article are described problems related to creation and maintenance of situational awareness systems. The definitions of concepts of situation and its identification are presented. An approach based on situational knowledge representation with ontological models is selected for attaining situational awareness in complex intelligent enterprise systems, where objects can be in several situations in the same time and some situations are defined imprecisely. Granular computing approach is used for reduction of situational knowledge management complexity. In order to work with situation defined imprecisely, rough set approximations are proposed for situation definition. The usage of mechanisms inherent to ontological modeling for situation representation and reasoning about them are also discussed.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2017, 6, 2; 45-50
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bounds of the effective elastic moduli of nanoparticle-reinforced composites based on composite sphere assemblage and interface stress model
Autorzy:
Tang, Z.
Ye, W.
Powiązania:
https://bibliotekanauki.pl/articles/38695694.pdf
Data publikacji:
2022
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
elastic moduli
bulk modulus
shear modulus
composite sphere assemblage
interface stress model
Opis:
Three different approaches are formulated to obtain the bounds of the effective elastic moduli of nanoparticle-reinforced composites based on the CSA and the interface stress model. It is found that the effective bulk modulus can be obtained by all three different approaches but the effective shear modulus can be obtained only by the energy approach. The bounds of the effective bulk modulus coincide and depend only on the interface bulk modulus, while those of the effective shear modulus are distinct and depend on two interface elastic constants. Furthermore, limit analysis discloses that the bounds of the effective bulk modulus of nanoparticles coincide but deviate from the bulk modulus of particle in the classical case, and the bounds of the effective shear modulus are distinct in contrast to the effective bulk modulus of nanoparticles or both effective moduli of conventional composites.
Źródło:
Archives of Mechanics; 2022, 74, 4; 283-317
0373-2029
Pojawia się w:
Archives of Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development and study of laminated aluminum-ceramic armor materials
Autorzy:
Kharchenko, Ye.F.
Kurmashova, I.A.
Solovyova, Ye.A.
Powiązania:
https://bibliotekanauki.pl/articles/237986.pdf
Data publikacji:
2009
Wydawca:
Instytut Technologii Bezpieczeństwa Moratex
Tematy:
materiały ceramiczne
aluminium laminowane
odzież ochronna
kamizelka ochronna
protective vest
protective clothing
aluminum laminated
ceramic materials
Źródło:
Techniczne Wyroby Włókiennicze; 2009, R. 17, nr 2/3, 2/3; 40-41
1230-7491
Pojawia się w:
Techniczne Wyroby Włókiennicze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Density of Electron States and Relaxation Time of Intercalated Layer Crystals
Autorzy:
Tovstyuk, N.
Sheregiy, Ye.
Powiązania:
https://bibliotekanauki.pl/articles/1402585.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.-b
71.55.-i
77.22.Gm
Opis:
The density of electron states of layered crystal intercalated by guests of different nature is calculated within the framework of virtual crystal considering filling of both octahedral and tetrahedral interstitial hollows. It is found that the shift of the gap of density of states is caused firstly by the nature of intercalant (placing of ground energy states of both intercalants) and their average concentrations. In the case when one type of intercalant gives localized level in the forbidden gap and another intercalant forms the resonance one in the conductive band the gap disappears. Relaxation time corresponding to the transitions from one to another band is calculated.
Źródło:
Acta Physica Polonica A; 2015, 128, 2; 225-227
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spare parts logistics of automobile enterprises in conditions of module production
Autorzy:
Krykawski, Ye.
Fihun, N.
Powiązania:
https://bibliotekanauki.pl/articles/410748.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
module production
logistics
spare parts
automotive industry
relationship management
cooperation
Opis:
The peculiarities of module production of automobile companies are lighted. Research on the role of innovations in automotive development has been carried out. An algorithm of decision making for optimizing logistics costs is presented. The hierarchy of needs in the area of spare parts maintenance is presented. The benefits of partnership relations in the automotive industry are outlined.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2012, 1, 3; 45-54
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Steady-state modelling method for matrix-reactance frequency converter with boost topology
Autorzy:
Korotyeyev, I.Ye.
Zięba, B.
Powiązania:
https://bibliotekanauki.pl/articles/140872.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
przekształtnik AC/AC
matrycowo-reaktancyjny przemiennik częstotliwości
metoda Galerkina
równanie różniczkowe
AC/AC converters
matrix-reactance frequency converter
Galerkin's method
extension of differential equations
Opis:
This paper presents a method intended for calculation of steady-state processes in AC/AC three-phase converters that are described by nonstationary periodical differential equations. The method is based on the extension of nonstationary differential equations and the use of Galerkin's method. The results of calculations are presented in the form of a double Fourier series. As an example, a three-phase matrix-reactance frequency converter (MRFC) with boost topology is considered and the results of computation are compared with a numerical method.
Źródło:
Archives of Electrical Engineering; 2011, 60, 2; 137-148
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of three-phases matrix reactance frequency converter with two pulsations of control signal
Autorzy:
Korotyeyev, I.Ye.
Zięba, B.
Powiązania:
https://bibliotekanauki.pl/articles/141295.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rozszerzenie równań różniczkowych
metoda Galerkina
matrix-reactance frequency converter
non-stationary periodic differential
Galerkin's method
extension of differential equations
Opis:
This paper presents a method of calculation of steady-state processes in threephases matrix-reactance frequency converters (MRFC's), in which voltages and currents are transformed by control signals with two pulsations. A solution of nonstationary differentia equations with periodic coefficients that describe this system is obtained by using Galerkin's method and an extension of equations of one variable of time to equations of two variables of time. The results of calculations are presented in an example of three-phases MRFC with buck-boost topology and compared with a numerical metod embedded in the program Mathematica.
Źródło:
Archives of Electrical Engineering; 2012, 61, 3; 359-371
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the stress strain of rock massif in the crooked wellbore
Autorzy:
Chernova, M, YE
Kuntsyak, Y. V.
Powiązania:
https://bibliotekanauki.pl/articles/298955.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
borehole
stress
drilling
rock
Opis:
We investigated the stressed-deformed state of rock mass in a deviated borehole. There were received the analytical dependencies for the determination of circular and radial stress that allows for a science-based approach to the design of a borehole profile during the drilling process in the uneven horizon of rock mass of such reservoirs as Dnipro-Donetsk Depression and Black Sea Shelf and the construction of hydroacoustic directional energy devices with controlled parameters.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 4; 507-512
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the Dynamic Characteristics of Warp in the Process of Weaving
Badanie charakterystyk osnowy w procesie tkania
Autorzy:
Shen, D. F.
Ye, G. M.
Powiązania:
https://bibliotekanauki.pl/articles/232138.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
loom
warp
nonlinear vibration
L-P method
Mathieu equation
krosna
osnowa
drgania nieliniowe
metoda L-P
równanie Mathieu
Opis:
The fluctuation process of warp movement is analysed by the nonlinear vibration method. Based on Newton’s Law, a differential equation of warp axial/cross direction movement is established. This paper separates the time variable from the space variable by the variable- separating method, then it gives a numerical solution of the motion equation by the fourth-order Runge-Kutta method. Also this paper discusses influencing factors and variable trends for warp vibration. Finally a method for the control of vibration is introduced.
Proces drgań przy ruchu osnowy jest analizowany przez nieliniową metodę określania drgań. Równanie różniczkowe poprzecznego i osiowego kierunku ruchu osnowy oceniane jest na podstawie prawa Newtona. W pracy tej zmienna czasowa i zmienna przestrzenna rozdzielone są metodą rozdziału zmiennych, co daje rozwiązanie numeryczne równania ruchu przy pomocy metody Runge-Kutty 4-tego rzędu. W artykule omówiono również wpływ czynników i tendencji zmien na drgania osnowy, jak również przedstawiono metodę kontroli drgań.
Źródło:
Fibres & Textiles in Eastern Europe; 2013, 2 (98); 68-73
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On non-stationary energy absorption when interacting high-speed striker with textile armor materials
Autorzy:
Kharchenko, Ye.F.
Yermolenko, A.F.
Powiązania:
https://bibliotekanauki.pl/articles/237951.pdf
Data publikacji:
2009
Wydawca:
Instytut Technologii Bezpieczeństwa Moratex
Tematy:
zbroja
materiały włókiennicze
pochłanianie energii
armor
textiles
energy absorption
Źródło:
Techniczne Wyroby Włókiennicze; 2009, R. 17, nr 2/3, 2/3; 73-77
1230-7491
Pojawia się w:
Techniczne Wyroby Włókiennicze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Model of Correspondence of Passenger Transportation on the Basis of Fuzzy Logic
Autorzy:
Fornalchyk, Ye.
Bilous, A.
Demchuk, I.
Powiązania:
https://bibliotekanauki.pl/articles/410734.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
fuzzy logic
transportation correspondence
membership function
basis of fuzzy rules
route attractiveness
Opis:
The article dwells upon possibilities of the implementation of smooth calculation methods for predicting the demand for passenger transportation. The developed model which is based on fuzzy logic successfully solves the problem with traffic assignment – formation of passenger throughput for each traffic route. The model of correspondence takes into account such defining factors as fare on the route, average headway on it and fullness of the vehicle saloon. Different combination of these factors forms attractiveness as a criterion of an optimal route for a prospective passenger. It is determined that the lower saloon fullness, transportation fare and headway, the higher attractiveness is. Using the reasoned criterion, it is possible to allocate the total number of prospective passengers according to each existing route.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2015, 4, 2; 59-64
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrable three-dimensional coupled nonlinear dynamical systems related with centrally extended operator Lie algebras
Autorzy:
Hentosh, O. Ye.
Prykarpatsky, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/255480.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
centrally extended operator Lie algebra
Lax-type flows
Backlund transformation
"ghost" symmetries
Opis:
A hierarchy of Lax-type flows on a dual space to the centrally extended Lie algebra of integral-differential operators with matrix-valued coefficients is considered. By means of a specially constructed Backlund transforniation the Hamiltonian representations for these flows coupled with suitable eigenfunctions and adjoint eigenfunctions evolutions of associated spectral problems are obtained. The Hamiltonian description of the corresponding set of additional symmetry hierarchies is represented. The relation of these hierarchies with Lax integrable (3+1)-dimensional nonlinear dynamical systems and their triple Lax-type linearizations is analysed.
Źródło:
Opuscula Mathematica; 2007, 27, 2; 231-244
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel Feature Extraction for Pineapple Ripeness Classification
Autorzy:
Wang, Hui Hui
Chai, Sze Ye
Powiązania:
https://bibliotekanauki.pl/articles/2058509.pdf
Data publikacji:
2022
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
image processing technique
pineapple
ripeness grading
Opis:
A novel feature extraction method has been proposed to improve the accuracy of the pineapple ripeness classification process. The methodology consists of six stages, namely: image acquisition, image pre-processing, color extraction, feature selection, classification and evaluation of results. The red element in the RGB model is selected as the threshold value parameter. The ripeness of pineapples is determined based on the percentage share of yellowish scales visible in images presenting the front and the back side of the fruit. The prototype system is capable of classifying pineap ples into three main groups: unripe, ripe, and fully ripe. The accuracy of 86.05% has been achieved during experiments.
Źródło:
Journal of Telecommunications and Information Technology; 2022, 1; 14--22
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and measure of novel stereo-garage driven by linear induction motor
Autorzy:
Lu, Q.
Ye, Y.
Shen, J.
Powiązania:
https://bibliotekanauki.pl/articles/140630.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FEM
linear induction motors
low frequency
stereo-garage
Opis:
The car access time is a key parameter, especially in a huge stereo-garage, where this one should be decreased as much as possible. This paper proposes a novel stereo-garage. Adopting the linear induction motors (LIMs), the system has a simple structure and rapid response capability. In the stereo-garage, several LIMs are installed below the crossbeam on a lifting platform, and several LIMs are fixed on the top of a moving frame. During the operation of LIMs, the moving frame moves forward and backward to reach the required parking place, whereas the crossbeam moves horizontally in order to take or store the vehicle rapidly. All these LIMs are the same and should be designed at a low frequency. The influences of key structure parameters and dynamic performances are investigated, based on FEM. The predicted results are validated by a prototype. Finally, the designed LIMs are successfully applied in two 8-layer stereo-garages.
Źródło:
Archives of Electrical Engineering; 2015, 64, 4; 669-678
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Asymptotically optimal algorithm for processing side radiation signals from monitor screens on liquid crystal structures
Asymptotycznie optymalny algorytm przetwarzania sygnałów promieniowania bocznego z ekranów monitorów LCD
Autorzy:
Yevgrafov, Dmytro V.
Yaremchuk, Yurii Ye.
Powiązania:
https://bibliotekanauki.pl/articles/28875037.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
side electromagnetic radiation and guidance
video card signals
liquid crystalstructures
spectra of signals
boczne promieniowanie elektromagnetyczne
przesłuchy
sygnały z kart graficznych
struktury ciekłokrystaliczne
widma sygnałów
Opis:
An asymptotically optimal compatible algorithm for detecting side radiation signals from the monitor screen on liquid crystalstructuresand estimating the duration of image immutability on the monitor screen is found, which will better intercept information from monitor screens.The structure of a special technical intelligence tool is justified as a maximum likelihood algorithm for a finite number of unknown quadrature amplitudes of the information leakage signal from the monitor screen on liquid crystal structures.
Znaleziono asymptotycznie optymalny wspólny algorytm wykrywania sygnałów promieniowania bocznego z ekranu monitora na strukturach ciekłokrystalicznych i szacowania czasu trwania niezmienności obrazu na ekranie monitora, który w najlepszy sposób przechwyci informacje z ekranów monitorów. Struktura specjalnego narzędzia wywiadu technicznego jest uzasadniona jako algorytm maksymalnego prawdopodobieństwa dla skończonej liczby nieznanych kwadraturowych amplitud sygnału wycieku informacji z ekranu monitora na strukturach ciekłokrystalicznych.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2023, 13, 4; 99--102
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Нейромедіаторні механізми когнітивних порушень в щурів при довготривалому пентиленететразоловому кіндлінзі
Neurotransmitter mechanisms of rats cognitive impairments in prolonged pentylenetetrazol-induced kindling
Autorzy:
Vastyanov, R. S.
Prishchepa, Ye. A.
Powiązania:
https://bibliotekanauki.pl/articles/1032246.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Kazimierza Wielkiego w Bydgoszczy
Tematy:
pentylenetetrazol
kindling
noradrenergic and serotoninergic neurotransmitter systems
conditioned reflex
cognitive impairments
Opis:
The data of experimental trials devoted to prolonged pentylenetetrazol (PTZ) kindling neurotransmitter mechanisms investigation are given. The authors studied the peculiarities of the conditioned reflex (CR) formation, its both preservation and inhibition in kindled rats in conditions of adrenergic and serotoninergic neurotransmitter systems activity modulation. The data obtained showed that kindled rats develop cognitive impairment as CR formation repression, inability of its saving and rapid inhibition. These impairments expression progresses in the chronic seizure activity model dynamics. Revealed mnestic disorders were found in kindling rats in case of both adrenergic and serotoninergic neurotransmitter systems activation that shows their pathogenetic importance in the context of prolonged PTZ-induced kindling.
Źródło:
Journal of Health Sciences; 2014, 4, 6; 147-156
1429-9623
Pojawia się w:
Journal of Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Structure, Variables and Interdependence of the Factors of Mental States of Expectations in Students’ Academic and Professional Activities
Autorzy:
Popovych, Igor S.
Blynova, Olena Ye.
Powiązania:
https://bibliotekanauki.pl/articles/1967756.pdf
Data publikacji:
2019-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
academic and professional activities
mental state of expectations
expected situation
realization of expectations
structure of mental state of expectations
Opis:
The study presents the content-analysis (n=135) and factor analysis of students’ mental states of expectations (n=123). The understanding of mental states of expectations by education workers allows for the operationalization of the process of solving tasks of students’ academic and professional training. The purpose is to examine the structure, variables and interdependence of the factors of students’ mental states of expectations. The research methods are content-analysis, tests with standardized questionnaires, factor analysis. Factor analysis was used to determine the structure of mental states of expectations. The principal factor in this structure is F1“meaning-of-life moderation” (20.70%), which is interrelated with F2 “pragmatic regulation” (=.404; p≤.01) and F3 “subjective regulation” (=.357; p≤.01). The obtained results could be useful for education directors organizing the academic process of students, and also for scientists in the field of psychology of expectations, psychology of constructing the future.
Źródło:
The New Educational Review; 2019, 55; 293-306
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear vibration signal tracking of large offshore bridge stayed cable based on particle filter
Autorzy:
Ye, Q.
Feng, Z.
Yuan, D.
Powiązania:
https://bibliotekanauki.pl/articles/260358.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
nonlinear vibration of stayed cables
large offshore bridge
particle filter
signal tracking
Opis:
The stayed cables are key stress components of large offshore bridge. The fault detection of stayed cable is very important for safe of large offshore bridge. A particle filter model and algorithm of nonlinear vibration signal are used in this paper. Firstly, the particle filter model of stayed cable of large offshore bridge is created. Nonlinear dynamic model of the stayed-cable and beam coupling system is dispersed in temporal dimension by using the finite difference method. The discrete nonlinear vibration equations of any cable element are worked out. Secondly, a state equation of particle filter is fitted by least square algorithm from the discrete nonlinear vibration equations. So the particle filter algorithm can use the accurate state equations. Finally, the particle filter algorithm is used to filter the vibration signal of bridge stayed cable. According to the particle filter, the de-noised vibration signal can be tracked and be predicted for a short time accurately. Many experiments are done at some actual bridges. The simulation experiments and the actual experiments on the bridge stayed cables are all indicating that the particle filter algorithm in this paper has good performance and works stably.
Źródło:
Polish Maritime Research; 2015, 4; 70-75
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Dynamic Characteristics of Vehicles on the Passenger Car Equivalent and Traffic Delay
Autorzy:
Fornalchyk, Ye.
Mohyla, I.
Hilevych, V.
Powiązania:
https://bibliotekanauki.pl/articles/411007.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
passenger car equivalent (PCE)
traffic delay
traffic light cycle
saturation flow
vehicle
technical condition
speed up
Opis:
The analysis of transportation flow andtechnical condition of cargo-carrying vehicles and buses has showed the need in the research of its influence on the passing density on signalized intersections. The indicator which reflects this influence is represented by light motor vehicle passenger car equivalent (PCE). The need in determining a passenger car equivalent for differently structured transportation flows is demonstrated not according to the recognized methodology, but according to the one developed by the authors which takes into account both diverse structure and the level of technical condition of road users. The latter one decreases launching dynamics of vehicles which depart from the stop line. The respective passenger car equivalents are determined for such a structure of traffic flow. These calculations differ from already known and normative ones. Due to the simulation (the VISSIM program) of passing at an intersection with the use of calculated passenger car equivalents which take into account the technical condition of vehicles, traffic delays on the main direction were defined as decreased by 7.6% for respective duration of permissive signal on a traffic light.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2015, 4, 2; 45-50
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Evaluation of the Possibility to Use the Water from Quarry Lakes for Irrigation
Autorzy:
Jawecki, Bartosz
Kowalczyk, Tomasz
Feng, Ye
Powiązania:
https://bibliotekanauki.pl/articles/123837.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
quarry lake
water reservoir
quarry
Strzelin
water quality
irrigation
SAR
TDS
EC
Opis:
The paper presents the evaluation of the possibility to use the water from five quarry lakes located in County Strzelin for the purposes of agricultural irrigation. The evaluation was based on the guidelines provided by FAO and in PN-84/C-04635. The average values of water quality indicators were as follows: electrical conductivity – 0.365 mS×cm-1; Sodium Adsorption Ratio – 0.75; Total Dissolved Solids – 233.9 mg×dm-3; water pH – 7.8; BOD5 – 1.6 mgO2×dm-3, while the average ion concentrations were: nitrates – 1.6 mgN-NO3×dm-3; sulphates – 188.5 mg SO4×dm-3; chlorides – 30.95 mg Cl×dm-3; sodium 22.6, mg Na×dm-3; manganese – 0.05 mg Mn×dm-3; and iron – 0.04 mg Fe×dm-3. The values of the analysed indicators were similar to the concentrations noted in natural lakes and unloaded water reservoirs. The water from the analysed quarry lakes met (with some minor limitations) the requirements that enable its use for agricultural irrigation, in particular sprinkler irrigation.
Źródło:
Journal of Ecological Engineering; 2019, 20, 9; 188-201
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Methodological Review of Exploring Turner’s Three-Process Theory of Power and the Social Identity Approach
Autorzy:
Ye, Michelle
Ollington, Nadia
de Salas, Kristy
Powiązania:
https://bibliotekanauki.pl/articles/2119633.pdf
Data publikacji:
2016-10-31
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Interpretivist
Positivist
Social Identity
Power
Ecological Validity
Experiment
Survey
Case Study
Opis:
Turner’s Three-Process Theory of Power together with Social Identity Theory (SIT) and Self-Categorization Theory (SCT) have been influential in social psychology to examine power-related behaviors. While positivist experimental and survey methods are common in social psychological studies, these approaches may not adequately consider Turner’s constructs due to a comparative lack of ecological validity. Drawing on a methodology-focused review of the existing research of applying aspects of Turner’s theory of power and SIT/SCT, the interpretivist case study approach by using interviews and other data collections is highlighted as an alternative and useful method to the application of Turner’s framework. The applicability of the interpretive case study approach is further emphasized in comparison with the positivist experiments and surveys. This paper also discusses how this new way of exploration may allow us to understand Turner’s work better.
Źródło:
Qualitative Sociology Review; 2016, 12, 4; 120-137
1733-8077
Pojawia się w:
Qualitative Sociology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and Analysis of Sintering Furnace Temperature Based on Fuzzy Neural Network Control
Autorzy:
Chaoxin, Zou
Rong, Li
Zhiping, Xie
Ming, Su
Jingshi, Zeng
Xu, Ji
Xiaoli, Ye
Ye, Wang
Powiązania:
https://bibliotekanauki.pl/articles/1837792.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fuzzy neural network
furnace
sintering
temperature control
PID
sieć neuronowa rozmyta
piec
spiekanie
kontrola temperatury
Opis:
Aiming at the problems of delay and couple in the sintering temperature control system of lithium batteries, a fuzzy neural network controller that can solve complex nonlinear temperature control is designed in this paper. The influence of heating voltage, air inlet speed and air inlet volume on the control of temperature of lithium battery sintering is analyzed, and a fuzzy control system by using MATLAB toolbox is established. And on this basis, a fuzzy neural network controller is designed, and then a PID control system and a fuzzy neural network control system are established through SIMULINK. The simulation shows that the response time of the fuzzy neural network control system compared with the PID control system is shortened by 24s, the system stability adjustment time is shortened by 160s, and the maximum overshoot is reduced by 6.1%. The research results show that the fuzzy neural network control system can not only realize the adjustment of lithium battery sintering temperature control faster, but also has strong adaptability, fault tolerance and anti-interference ability.
Źródło:
Archives of Foundry Engineering; 2021, 21, 1; 23-30
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and Analysis of Sintering Furnace Temperature Based on Fuzzy Neural Network Control
Autorzy:
Chaoxin, Zou
Rong, Li
Zhiping, Xie
Ming, Su
Jingshi, Zeng
Xu, Ji
Xiaoli, Ye
Ye, Wang
Powiązania:
https://bibliotekanauki.pl/articles/1837849.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fuzzy neural network
furnace
sintering
temperature control
PID
sieć neuronowa rozmyta
piec
spiekanie
kontrola temperatury
Opis:
Aiming at the problems of delay and couple in the sintering temperature control system of lithium batteries, a fuzzy neural network controller that can solve complex nonlinear temperature control is designed in this paper. The influence of heating voltage, air inlet speed and air inlet volume on the control of temperature of lithium battery sintering is analyzed, and a fuzzy control system by using MATLAB toolbox is established. And on this basis, a fuzzy neural network controller is designed, and then a PID control system and a fuzzy neural network control system are established through SIMULINK. The simulation shows that the response time of the fuzzy neural network control system compared with the PID control system is shortened by 24s, the system stability adjustment time is shortened by 160s, and the maximum overshoot is reduced by 6.1%. The research results show that the fuzzy neural network control system can not only realize the adjustment of lithium battery sintering temperature control faster, but also has strong adaptability, fault tolerance and anti-interference ability.
Źródło:
Archives of Foundry Engineering; 2021, 21, 1; 23-30
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of high quality doped CeO2 solid electrolytes with nanohetero structure
Autorzy:
Mori, T.
Drennan, J.
Ou, D.
Ye, F.
Powiązania:
https://bibliotekanauki.pl/articles/146211.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
doped CeO2
oxide ionic conductivity
microdomain
low temperature operation of fuel cells application
Opis:
Doped ceria (CeO2) compounds are fluorite related oxides which show oxide ionic conductivity higher than yttria-stabilized zirconia in oxidizing atmosphere. As a consequence of this, a considerable interest has been shown in application of these materials for low (400-650°C) temperature operation of solid oxide fuel cells (SOFCs). In this paper, our experimental data about the influence of microstructure at the atomic level on electrochemical properties were reviewed in order to develop high quality doped CeO2 electrolytes in fuel cell applications. Using this data in the present paper, our original idea for a design of nanodomain structure in doped CeO2] electrolytes was suggested. The nanosized powders and dense sintered bodies of M doped CeO2 (M:Sm,Gd,La,Y,Yb, and Dy) compounds were fabricated. Also nanostructural features in these specimens were introduced for conclusion of relationship between electrolytic properties and domain structure in doped CeO2. It is essential that the electrolytic properties in doped CeO2 solid electrolytes reflect in changes of microstructure even down to the atomic scale. Accordingly, a combined approach of nanostructure fabrication, electrical measurement and structure characterization was required to develop superior quality doped CeO2 electrolytes in the fuel cells.
Źródło:
Nukleonika; 2006, 51,suppl.1; 11-18
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SU(2) Coherent State Path Integral Investigation of the Holstein Dimer
Autorzy:
Hakioğlu, T.
Ivanov, V. A.
Zhuravlev, M. Ye.
Powiązania:
https://bibliotekanauki.pl/articles/2013732.pdf
Data publikacji:
2000-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
03.65.Db
71.36.+c
64.60.Ak
Opis:
The SU(2) coherent state path integral is used to investigate the partition function of the Holstein dimer. This approach naturally takes into account the dynamical symmetry of the model. The ground-state energy and the number of the phonons are calculated as functions of the parameters of the Hamiltonian. The renormalizations of the phonon frequency and electron hopping for bonding and antibonding states are considered. The destruction of quasiclassical mean field solution is discussed.
Źródło:
Acta Physica Polonica A; 2000, 97, 5; 927-930
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An improved cordic for digital subdivision of Moiré signal
Autorzy:
Zhu, Weibin
Ye, Shengjin
Huang, Yao
Xue, Zi
Powiązania:
https://bibliotekanauki.pl/articles/220979.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grating
digital subdivision
coordinate rotation digital computer
double-rotation
overall quantization error
Opis:
The contradiction between the restriction of grating manufacturing technology and high-resolution measurement requirements has been the focus of attention. The precision requirement of angle calculation during the digital subdivision processing of a Moiré signal is focused on, the causes of errors in the solution of arcsine function are analysed, and an improved coordinate rotation digital computer (CORDIC) with double-rotation iteration is proposed by discussing the principle of the conventional CORDIC in detail herein. Because the iterative number and data width of the improved CORDIC are limited by the finite digital circuit resources and thus determine the calculation accuracy directly, subsequently the overall quantization error (OQE) of the improved CORDIC is analysed. The approximate error and rounding error of the algorithm are deduced, and the error models of iterative number and data width are established. The validity and application value of the improved CORDIC are proved through simulations and experiments involving a subdividing circuit. The corresponding relation between the approximate error, rounding error and iteration number, as well as the bit width are proved by quantization. The error of subdivision with the improved CORDIC, obtained through a calibration experiment, is within ±0.5′′ and the mean variance is 0.2′′. The results of the research can be applied directly to a digital subdivision system to guide the parameter setting in the iterative process, which is of crucial importance in the quantitative analysis of error separation and error synthesis.
Źródło:
Metrology and Measurement Systems; 2020, 27, 1; 51-64
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of seminal plasma concentration on sperm motility and plasma and acrosome membrane integrity in chilled canine spermatozoa
Autorzy:
Pan, C.
Wu, Y.
Yang, Q.
Ye, J.
Powiązania:
https://bibliotekanauki.pl/articles/2087767.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
seminal plasma
chill
canine
sperm
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 1; 133-138
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The chromatic equivalence class of graph $\overline{B_{n-6,1,2}}$
Autorzy:
Wang, Jianfeng
Huang, Qiongxiang
Ye, Chengfu
Liu, Ruying
Powiązania:
https://bibliotekanauki.pl/articles/743311.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
chromatic equivalence class
adjoint polynomial
the smallest real root
the second smallest real root
the fourth character
Opis:
By h(G,x) and P(G,λ) we denote the adjoint polynomial and the chromatic polynomial of graph G, respectively. A new invariant of graph G, which is the fourth character R₄(G), is given in this paper. Using the properties of the adjoint polynomials, the adjoint equivalence class of graph $B_{n-6,1,2}$ is determined, which can be regarded as the continuance of the paper written by Wang et al. [J. Wang, R. Liu, C. Ye and Q. Huang, A complete solution to the chromatic equivalence class of graph $\overline{B_{n-7,1,3}}$, Discrete Math. (2007), doi: 10.1016/j.disc.2007.07.030]. According to the relations between h(G,x) and P(G,λ), we also simultaneously determine the chromatic equivalence class of $\overline{B_{n-6,1,2}}$ that is the complement of $B_{n-6,1,2}$.
Źródło:
Discussiones Mathematicae Graph Theory; 2008, 28, 2; 189-218
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robotic assembly of aero-engine components
Autorzy:
Jayaweera, N.
Webb, P.
Ye, C.
Johnson, C.
Powiązania:
https://bibliotekanauki.pl/articles/1429288.pdf
Data publikacji:
2008
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
robotic assembly
aero-engine components
Opis:
The VITAL (EnVIronmenTALly Friendly Aero Engines) project funded by the European Commission under Framework 6 aims to provide significant reductions in aero-engine fuel burn, noise and emissions through the development of innovative design and manufacturing techniques. One method of reducing the amount of fuel burnt, and hence CO2 produced, is to reduce the weight of the engine. A significant proportion of an engine's weight is due to the large castings used to form the main non-rotating structures; the replacement of these with fabricated structures could provide a significant weight reduction. This paper describes the design and implementation of a robotic assembly cell for complex aero-engine components. A series of experiments were performed to prove the feasibility of the automated assembly process. The results presented indicate that automated robotic assembly is feasible and cost effective.
Źródło:
Journal of Machine Engineering; 2008, 8, 3; 5-16
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Analysis of Ultrasonic Composite Transducer with a Quarter-wave Taper Transition Horn
Autorzy:
Chen, Tao
Li, Hongbo
Wang, Qihan
Ye, Junpeng
Powiązania:
https://bibliotekanauki.pl/articles/1953535.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
equivalent circuit
composite transducer
quarter-wave
prestressed bolt
finite element analysis
Opis:
Based on the electromechanical equivalent circuit theory, equations related to the resonance frequency and the magnifying coefficient of a quarter-wave vibrator and a quarter-wave taper transition horn were deduced, respectively. A series of 3D models of ultrasonic composite transducers with various conical section length was also established. To reveal the influences of the conical section length and the prestressed bolt on the dynamic characteristics (resonance frequency, amplitude, displacement node, and the maximum equivalent stress) of the models and the design accuracy, finite element (FE) analyses were carried out. The results show that the addition of prestressed bolt increases the resonance frequency and causes the displacement node on the center axis to move towards the small cylindrical section. As the conical section length rises, the increment of resonance frequency reduces and tends to a stable value of 360 Hz while the displacement of the node on the center axis becomes lager and gradually approaches 1.5 mm. Furthermore, the amplitude of the output terminal is stable at 16.18 µm under 220 V peak-topeak (77.8 VRMS) sinusoidal potential excitation. After that, a prototype was fabricated and validated experiments were conducted. The experimental results are consistent with that of theory and simulations. It provides theoretical basis for the design and optimization of small-size, large-amplitude, and high-power composite transducers.
Źródło:
Archives of Acoustics; 2020, 45, 4; 687-697
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel variant of the salp swarm algorithm for engineering optimization
Autorzy:
Jia, Fuyun
Luo, Sheng
Yin, Guan
Ye, Yin
Powiązania:
https://bibliotekanauki.pl/articles/23944824.pdf
Data publikacji:
2023
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
salp swarm algorithm
meta-heuristic algorithm
chaos theory
sine-cosine mechanism
quantum computation
optimization design of engineering
Opis:
There are many design problems need to be optimized in various fields of engineering, and most of them belong to the NP-hard problem. The meta-heuristic algorithm is one kind of optimization method and provides an effective way to solve the NP-hard problem. Salp swarm algorithm (SSA) is a nature-inspired algorithm that mimics and mathematically models the behavior of slap swarm in nature. However, similar to most of the meta-heuristic algorithms, the traditional SSA has some shortcomings, such as entrapment in local optima. In this paper, the three main strategies are adopted to strengthen the basic SSA, including chaos theory, sine-cosine mechanism and the principle of quantum computation. Therefore, the SSA variant is proposed in this research, namely SCQ-SSA. The representative benchmark functions are employed to test the performances of the algorithms. The SCQ-SSA are compared with the seven algorithms in high-dimensional functions (1000 dimensions), seven SSA variants and six advanced variants on benchmark functions, the experiment reveals that the SCQ-SSA enhances resulting precision and alleviates local optimal problems. Besides, the SCQ-SSA is applied to resolve three classical engineering problems: tubular column design problem, tension/compression spring design problem and pressure vessel design problem. The design results indicate that these engineering problems are optimized with high accuracy and superiority by the improved SSA. The source code is available in the URL: https://github.com/ye-zero/SCQSSA/tree/main/SCQ-SSA.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2023, 13, 3; 131--149
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An approach to suppress high-frequency resonance using model predictive and selective harmonic elimination combined strategy
Autorzy:
Chen, Sitong
Chen, Xiaoqiang
Wang, Ying
Xiong, Ye
Powiązania:
https://bibliotekanauki.pl/articles/1841300.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CRH5 EMUs and traction power supply coupled system
high-frequency oscillation
high speed railway
model predictive control (MPC)
selective harmonic elimination pulse-width modulation (SHEPWM)
CRH5 EMU i system sprzężony z zasilaniem trakcyjnym
oscylacja wysokiej częstotliwości
kolej dużych prędkości
kontrola predykcyjna modelu (MPC)
selektywna eliminacja harmoniczna modulacja szerokości impulsu (SHEPWM)
Opis:
High-frequency resonance is a prominent phenomenon which affects the normal operation of the high-speed railway in China. Aiming at this problem, the resonance mechanism is analyzed first. Then, model predictive control and selective harmonic elimination pulse-width modulation (MPC-SHEPWM) combined control strategy is proposed, where the harmonics which cause the resonance can be eliminated at the harmonic source. Besides, the MPC is combined to make the current track the reference in transients. The proposed control has the ability to suppress the resonance while has a faster dynamic performance comparing with SHEPWM. Finally, the proposed MPC-SHEPWM is tested in a simulation model of CRH5 (Chinese Railway High-speed), EMUs (electric multiple units) and a traction power supply coupled system, which shows that the proposed MPC-SHEPWM approach can achieve the resonance suppression and shows a better dynamic performance.
Źródło:
Archives of Electrical Engineering; 2021, 70, 2; 415-430
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the design of container highway and railway automatic transfer vehicle in ocean port
Autorzy:
Dong, L.
Liu, G.
Ye, X.
Wang, W.
Powiązania:
https://bibliotekanauki.pl/articles/962741.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ocean port
multimodal transport
highway and railway
unmanned automatic
seamless connection
Opis:
To realize “seamless” connection of ocean port container multimodal transport, efficiently carry out “door-to-door” transport of ocean port containers and overcome the shortcomings of existing highway and railway vehicles, this study takes the standard for heavy-duty container vehicles in TB1335-1996 Railway Vehicle Strength Design and Test Identification Code as the design basis and designs a new ocean port container transport vehicle in combination with automatic guidance technology. This study innovatively designs the automatic lifting system of the bogie and the docking part of the vehicle, introduces the automatic guidance technology and the remote-control technology to optimize the car body structure, and uses the SAP software to carry out the finite element analysis of the car body load capacity and Flexsim software to carry out the simulation analysis on the operation of vehicles. The designed transfer vehicle can improve the transfer efficiency of ocean port containers, reduce the transit time of field and station equipment and container transport links, and improve the level of multimodal transport and comprehensive economic benefits.
Źródło:
Polish Maritime Research; 2018, S 3; 5-12
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural reliability analysis based on fuzzy random uncertainty
Analiza niezawodności strukturalnej w oparciu o rozmytą niepewność losową
Autorzy:
You, Lingfei
Zhang, Jianguo
Li, Qiao
Ye, Nan
Powiązania:
https://bibliotekanauki.pl/articles/301548.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
fuzzy random uncertainty
approximation method
envelope distribution
structure
cut level
rozmyta niepewność losowa
metoda aproksymacji
rozkład obwiedni
struktura
poziom cięcia
Opis:
To address the fuzzy random uncertainty in structural reliability analysis, a novel method for obtaining the membership function of fuzzy reliability is proposed on the two orders four central moments (TOFM) method based on envelope distribution. At each cut level, the envelope distribution is first constructed, which is a new expression to describe the bound of the fuzzy random variable distribution. The central moments of the bound distribution are determined by generating samples from the envelope distribution, and they are used to calculate the central moments of the limit state function based on the first two orders of the Taylor expansion. Thereafter, the modern approximation method is used to approximate the polynomial expression for the limit state function probability density function (PDF) by considering the central moments as constraint conditions. Thus, the reliability boundaries can be calculated under the considered cut level, and the membership function of the fuzzy reliability is subsequently obtained. Three examples are evaluated to demonstrate the efficiency and accuracy of the proposed method. Moreover, a comparison is made between the proposed method, Monte Carlo simulation (MCS) method, and fuzzy first-order reliability method (FFORM). The results show the superiority of the proposed method, which is feasible for the analysis of structural reliability with fuzzy randomness.
W pracy przedstawiono metodę, która pozwala na uwzględnienie rozmytej niepewności losowej w strukturalnej analizie niezawodności. Zaproponowana metoda określania funkcji przynależności niezawodności rozmytej wykorzystuje cztery momenty centralne dwóch rzędów czy czwarte momenty centralne drugiego rzędu obliczane w oparciu o rozkład obwiedni. Dla każdego poziomu cięcia, najpierw konstruuje się rozkład prawdopodobieństwa obwiedni, za pomocą którego opisuje się granice rozkładu rozmytych zmiennych losowych, a momenty centralne rozkładu ograniczonego wyznacza się poprzez generowanie prób z rozkładu obwiedni. Następnie, stosując nowoczesną metodę optymalnej aproksymacji, otrzymuje się aproksymowane wyrażenie wielomianowe funkcji gęstości prawdopodobieństwa rozkładu obwiedni, gdzie momenty centralne stanowią warunki ograniczające, które pozwalają aproksymować niezawodność za pomocą rozwinięcia Taylora drugiego rzędu funkcji stanu granicznego. W ten sposób granice niezawodności oblicza się na rozważanym poziomie cięcia, a następnie otrzymuje się funkcję przynależności niezawodności rozmytej. W artykule przeanalizowano trzy przykłady, na podstawie których wykazano skuteczność i trafność proponowanej metody. Przeprowadzono także porównanie z metodą symulacji Monte Carlo oraz metodą analizy rozmytej niezawodności pierwszego rzędu. Wyniki wskazują na wyższość omawianej metody, która pozwala analizować niezawodność strukturalną w warunkach losowości rozmytej.
Źródło:
Eksploatacja i Niezawodność; 2019, 21, 4; 599-609
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rapid estimation of environmental radioactivity surrounding Xiangshan uranium deposits, Jiangxi province, Eastern China
Autorzy:
Gan, N.
Cen, K.
Ye, R.
Li, T.
Powiązania:
https://bibliotekanauki.pl/articles/148900.pdf
Data publikacji:
2018
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
gamma dose rate
indoor radon
water radon
cesium
annual effective dose
Xiangshan uranium deposit
Opis:
The surveys of terrestrial gamma dose rate, radon concentration indoor and in water and specific activity of radionuclides of soil were carried out in 14 villages and a town in Xiangshan uranium deposit and surrounding area, Jiangxi province, Eastern China, in 2017–2018, using a scintillator dosemeter, an ionization chamber and a high-purity germanium gamma spectrometer to study radiation status in these places after remediation. A radioactive hot spot was discovered in a village near the mining office, where specific activity of 238U, 226Ra, 232Th and 137Cs of soil was as high as 1433 ± 76 Bq/kg, 1210 ± 62 Bq/kg, 236 ± 13 Bq/kg and 17 ± 1.1 Bq/kg, respectively. The dose rate on a waste rock heap was about 2423 nGy/h. Approximately 50% of the houses in a village near the uranium mining site had radon concentrations that exceeded 160 Bq/m3 . There was a significant positive correlation between indoor radon concentration and outdoor gamma dose rate (R2 = 0.7876). The abnormal radon concentration was observed in a rising spring sample providing residents with tap water up to 127.1 Bq/l. Four tap water samples and three of five well water samples exceeded the limit of radon concentration of drinking water in China (11.1 Bq/l). The mean annual effective doses from gamma dose rate data were 0.86 mSv/y and 1.13 mSv/y for indoor radon. The study shows that there are some radioactively contaminated places surrounding the Xiangshan uranium mine. The local outdoor dose rate averages may be used to estimate local indoor radon concentrations.
Źródło:
Nukleonika; 2018, 63, 4; 113-121
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Highly accurate calibration system for electronic instrument transformers
Autorzy:
Tong, Y.
Ye, G.
Guo, K.
Li, H.
Powiązania:
https://bibliotekanauki.pl/articles/220441.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electronic instrument transformers
digital output
calibration system
virtual instrument
Fourthorder Convolution Window
Opis:
A high accurate electronic instrument transformer calibration system is introduced in this paper. The system uses the fourth-order convolution window algorithm for the error calculation method. Compared with Fast Fourier Transform, which is recommended by standard IEC-60044-8 (Electronic current transformers), it has higher accuracy. The relative measuring errors caused by asynchronous sampling could be reduced effectively without any special hardware technique adopted. The results show that the ratio error caused by asynchronous sampling can be reduced to 10-4, and the phase error can be reduced to 10-3 degrees when the deviation of frequency is within š0.5 Hz. The present method of measurement processing is achieved by a high-accuracy USB multifunction data acquisition (DAQ) card and virtual measurement devices, with low cost, short exploitation period and high stability.
Źródło:
Metrology and Measurement Systems; 2011, 18, 2; 315-322
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 115

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