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    Tytuł:
    Factors Affecting the Measurement of the Percentage of Gaseous Products from Boron-based Fuel-rich Propellants
    Autorzy:
    Liu, L.-L.
    He, G.-Q.
    Wang, Y.-H.
    Liu, P.-J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358720.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    fuel-rich propellant
    percentage gaseous products
    combustion
    filter media
    Opis:
    Acid-washed asbestos, carbon fibre, and MgO with carbon fibre were used as the filter media in order to compare their filtering qualities in the estimation of the percentage of gaseous products (PGP) arising from the combustion of singlebase propellants, double-base propellants, and boron-based fuel-rich propellants. The comparison was based on an analysis of the experimentally registered influence of the propellant formulation, the propellant load, the maximum chamber pressure and the thickness of the MgO filter layer on the PGP from the fuel-rich propellant, and in particular on the PGP produced by combustion of boron-based fuel-rich propellant. The results showed that the experimental values of the PGP were closer to the theoretically predicted values when carbon fibre mixed with MgO powder was used as the filter medium. The PGP of boron-based fuel-rich propellant increased when the AP was in part replaced by HMX, when the AP content was increased and when boron was in part replaced by magnesium-aluminum alloy. In terms of the apparatus used in these experiments, the propellant loading density was found to have little correspondence with the PGP for boron-based fuel-rich propellant. The optimal propellant loading density for the chamber volume of 85 cm3 was found to be 2-2.5 g, in view of the reliability and safety of the experiment. It is emphasised that the thickness of the MgO filter layer is very important for the accuracy and reliability of the experiment, and that the optimum should be determined by experiment.
    Źródło:
    Central European Journal of Energetic Materials; 2014, 11, 1; 15-29
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of upper extremity position on EMG signal measures calculated in time, frequency and time-frequency domains
    Autorzy:
    Wang, J.
    Bartuzi, P.
    Roman-Liu, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/306619.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    upper extremity
    EMG
    position
    time-frequency domain
    postawa ciała
    biomechanika
    Opis:
    The aim of this study was to investigate the relationship between time-frequency, time and frequency measures when considering various upper extremity positions below the level of the shoulder and in trapezius as well as deltoideus muscles. During the experiment, 15 subjects performed a task that involved screwing and unscrewing a screw cap on a board in six different locations, i.e., there were six upper extremity positions. Variables were calculated in the time, frequency and time-frequency domains on a recorded EMG signal. The results showed that parameters analyzed in the time-frequency domain were more sensitive to changes in position than parameters analyzed in the frequency domain.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2013, 15, 4; 83-91
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Toluene Mono-nitration in a Semi-batch Reactor
    Autorzy:
    Chen, L. P.
    Chen, W. P.
    Liu, Y.
    Peng, J. H.
    Liu, R. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/358853.pdf
    Data publikacji:
    2008
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    toluene mono-nitration
    apparent activation energy
    semi-batch reaction
    thermal hazard
    Opis:
    Toluene mono-nitration in a semi-batch reactor was investigated with reaction calorimeter (RC1). The mixed acid HNO3/H2SO4/H2O (wt%) was used in proportion 13/66/21, which is similar to industrial parameters. The exothermic rates at different reaction temperatures were compared, and then the curves of heat generation rate after dosing were analyzed. The Maximal Temperature attainable by runaway of the desired Synthetic Reaction (MTSR) under different conditions were calculated for the course hazard evaluation. The results showed that the average reaction heat of mono-nitration was between 169.07~177.11 kJ mol-1, and the special heat of reactant was about 2 kJ kg-1 K-1. Average Ea of second order kinetic was about 30 kJ mol-1, and reaction rate was 10-4 mol s-1 l-1 order of magnitude when the strength of sulphuric acid was about 73.5%. It was also found that when temperature or stirring speed increases, the potential heat accumulation decreases.
    Źródło:
    Central European Journal of Energetic Materials; 2008, 5, 2; 37-47
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation of Ag nanoparticles-reinforced polyamide 6 nanocomposites by in situ polymerization and investigation of its properties
    Autorzy:
    Xu, Q.
    Feng, X.
    Liu, J.
    Gong, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/778762.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    In-situ solution polymerization
    Ag nanomaterials
    nanocomposites
    crystallization properties
    mechanical properties
    Opis:
    Polyamide 6 (noted as PA6)/Ag nanocomposites were prepared by an in situ solution polymerization method. AgNO3  was used as filler and was directly reduced to silver nanoparticles resulting in uniformly dispersed nanoparticles in the PA6 matrix. The thermal stability, crystallization, melting performance, and dispersion properties of the PA6/Ag nanocomposites were studied using transmission electron microscopy (TEM), thermogravimetric analysis (TG), differential thermal scanning calorimetry (DSC), X-ray diffraction (XRD), and polarized light microscopy (POM). Furthermore, the mechanical and tribological behaviors of as-prepared nanocomposites were evaluated using universal tensile testing, impact testing, and friction testing machines. The results show that Ag-nanoparticles are evenly dispersed in PA6 and decrease in size with increasing Ag content. Whereas the crystallinity increased with increasing Ag content, the crystallization temperature of the nanocomposites did not change significantly. However, the mechanical and tribological properties of the nanocomposites increased compared with pure PA6.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 4; 36-40
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and Optical Properties of ZnO Nanowires Doped with Magnesium
    Autorzy:
    Zhuang, H.
    Wang, J.
    Liu, H.
    Li, J.
    Xu, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1505046.pdf
    Data publikacji:
    2011-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.Km
    61.72.uj
    81.15.Gh
    78.67.-n
    Opis:
    ZnO nanowires doped with Mg have been successfully prepared on Au-coated Si (111) substrates using chemical vapor deposition method with a mixture of ZnO, Mg, and activated carbon powders as reactants at 850°C. The structural, compositional, morphological and optical properties of the samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and photoluminescence spectroscopy. The nanowires are single crystalline in nature and preferentially grow up along [0001] direction with the average diameter and length of about 60 nm and several hundred micrometers, respectively, thinner and longer than the results of literature using the similar method. Room temperature photoluminescence spectroscopy shows a blueshift from the bulk band gap emission, which can be attributed to Mg doping that were detected by energy dispersive X-ray analysis EDX in the nanowires. Finally, the possible growth mechanism of crystalline ZnO nanowires is discussed briefly.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 6; 819-823
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differences in Lumbar Spine Load Due to Posture and Upper Limb External Load
    Autorzy:
    Kamińska, J.
    Roman-Liu, D.
    Zagrajek, T.
    Borkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/89864.pdf
    Data publikacji:
    2010
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    finite element model
    muscle co-operation
    spine load
    lumbar spine
    Opis:
    As the lumbar region of the spine is particularly predisposed to musculoskeletal disorders, the aim of this article was to assess lumbar spine load on the basis of an accurate model of this part of the body. The model was developed with the finite element method and the energy criterion for optimising muscle work. Computer calculations confirmed that stresses and compression forces in intervertebral discs increased with an increase in the load force and that they were significantly larger in the bent forwards posture than in the erect posture. This result clearly shows that lifting light objects and the erect posture are important elements in minimising spine load.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2010, 16, 4; 421-430
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zasady modelowania zagrożeń elektromagnetycznych. Modelowanie ciała pracownika
    The principles of electromagnetic hazards modelling. Workers body modeling
    Autorzy:
    Zradziński, P.
    Karpowicz, J.
    Roman-Liu, D.
    Gryz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/180359.pdf
    Data publikacji:
    2006
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    zagrożenia elektromagnetyczne
    modelowanie
    electromagnetic hazards
    modelling
    Opis:
    Zagrożenia elektromagnetyczne w środowisku pracy mogą być analizowane z wykorzystaniem symulacji komputerowych. Zastosowanie realistycznego modelu ciała pracownika jest jednym z najistotniejszych elementów tego typu analizy. Realistyczny ergonomicznie model CIOP-MAN opracowano do analizy zagrożeń pracowników. Wymiary geometryczne modelu zharmonizowano z danymi ergonomicznymi dorosłej populacji polskiej. Pozycja ciała modelu CIOP-MAN może być dopasowana do charakterystyki czynności zawodowych wykonywanych przez pracownika. W artykule zaprezentowano zasady modelowania zagrożeń elektromagnetycznych, podstawowe modele ludzi stosowane przy modelowaniu numerycznym oraz przykładowe rezultaty symulacji wykonanych z wykorzystaniem różnych modeli ciała pracownika do oceny miar wewnętrznych ekspozycji na pola elektromagnetyczne. Przeanalizowano także użyteczność poszczególnych modeli.
    Electromagnetic hazards in the workplace can be analysed with numerical simulations. The use of a realistic model of a worker plays a very important role in that context. An ergonomically realistic model CIOP-MAN was compiled for an analysis of hazards workers are exposed to. The dimensions of CIOP-MAN are harmonised with ergonomics data for Poland's adult population. The posture of the CIOP-MAN model can be adjusted according to the characteristics of a worker's occupational activities. The paper presents the principles of electromagnetic hazards modelling, human body models commonly used for numerical modeling and sample results of simulations executed with various human body models to assess the internal measures of electromagnetic exposure. The usefulness of specific models is analysed.
    Źródło:
    Bezpieczeństwo Pracy : nauka i praktyka; 2006, 10; 24-27
    0137-7043
    Pojawia się w:
    Bezpieczeństwo Pracy : nauka i praktyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A hierarchical inferential method for indoor scene classification
    Autorzy:
    Jiang, J.
    Liu, P.
    Ye, Z.
    Zhao, W.
    Tang, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/330842.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    indoor scene classification
    semantic hierarchical structure
    rule based inference
    Markov logic network
    struktura hierarchiczna
    regułowy system wnioskowania
    sieć logiczna Markova
    Opis:
    Indoor scene classification forms a basis for scene interaction for service robots. The task is challenging because the layout and decoration of a scene vary considerably. Previous studies on knowledge-based methods commonly ignore the importance of visual attributes when constructing the knowledge base. These shortcomings restrict the performance of classification. The structure of a semantic hierarchy was proposed to describe similarities of different parts of scenes in a fine-grained way. Besides the commonly used semantic features, visual attributes were also introduced to construct the knowledge base. Inspired by the processes of human cognition and the characteristics of indoor scenes, we proposed an inferential framework based on the Markov logic network. The framework is evaluated on a popular indoor scene dataset, and the experimental results demonstrate its effectiveness.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2017, 27, 4; 839-852
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and implementation of large vessel navigation system based on beidou cors
    Autorzy:
    Huang, P.
    Liu, Y.
    Du, Z.
    Chen, Q.
    Chen, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/260264.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Berthing
    ship-based
    Polar Coordinates
    CORS
    Opis:
    The ship’s pilot can obtain the ship auxiliary information through the navigation system, when berthing system can display the parameters such as traverse speed and distance of the ship. But most of the system data show that there are insufficient precision. Taking the CORS system to obtain the location information, data Calculation of Berthing System based on Polar Coordinate Algorithm, this paper puts forward a solution to the “dead point” of the berthing and aiding system, which has a certain reference value for the design of the ship berthing assistance system.
    Źródło:
    Polish Maritime Research; 2017, S 3; 12-15
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hierarchy of plasticity traits in responses of Quercus aliena to light conditions and water availability
    Autorzy:
    Xu, N.
    Wang, R.
    Liu, J.
    Lu, P.
    Guo, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/41404.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Opis:
    This study aimed to investigate plasticity of different plant traits to varied light and water availability. A greenhouse experiment was conducted with Quercus aliena seedlings with two light and four soil water levels. Plant traits related to leaf physiology, morphology, anatomy, and biomass production were determined. The results showed that plant size had significant effects on leaf area, leaf number, shoot height, basal diameter and crown area. After excluding the influence of plant size, water treatment had stronger effects on plants compared to light levels, and their interaction effect was significant. The limited water supply significantly inhibited leaf photosynthetic rate and the fluorescence efficiency under high light. However, leaves submitted to moderate drought stress showed enhanced fluorescence activity under shade condition. Grand plasticity of leaf physiology and growth was the highest, followed by biomass allocation and leaf morphology, and lastly anatomy, and this ranking did not change as resources considered. Among the variables, leaf petiole length, chlorophyll content and leaf area could be selected as candidates for estimation of species’ plasticity to water, light and their interaction, respectively. Therefore, our results suggested that there was a hierarchy existing among traits plasticity in Q. aliena, and supported the aboveground facilitation hypothesis that shade could alleviate the adverse effect of drought.
    Źródło:
    Dendrobiology; 2015, 74
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chinese cabbage BrMYB34.2 transcription factor regulates indolic glucosinolates biosynthesis in Arabidopsis
    Autorzy:
    Zhao, Y.
    Zhang, Y.
    Guo, X.
    Ma, Y.
    Zhang, P.
    Liu, H.
    Liu, G.
    Guo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/12705984.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Glucosinolates (GS) are a group of sulfur- and nitrogen-rich plant secondary metabolites that originate from amino acids and exist mainly in plants in the order Brassicales, such as Arabidopsis thaliana (Arabidopsis) and Chinese cabbage (Brassica rapa ssp. pekinensis). To date, several regulatory components responsible for GS biosynthesis have been identified in Arabidopsis. However, the functions of GS biosynthesis regulators in Chinese cabbage have not been clarified. In our current study, a putative ATR1/MYB34 orthologous gene, BrMYB34.2, was isolated from Chinese cabbage leaves. To investigate the function of this gene, we engineered Arabidopsis plants that overexpress BrMYB34.2 ectopically and phenotypic analysis was performed. Moreover, we assayed the accumulation levels of indolic GS (IGS) and aliphatic glucosinolates in transgenic plants and test the expression of key genes of IGS biosynthesis and tryptophan synthesis by Real-time quantitative PCR. And further analysed the resistance of transgenic plants in 5MT stress treatment. The results indicate that ectopic expression of the BrMYB34.2 gene in Arabidopsis was able to up-regulate the accumulation level of IGS due to the increased expression of IGS and Trp biosynthetic genes. Moreover, overexpression of BrMYB34.2 conferred Arabidopsis 5MT resistance. These results suggest that the BrMYB34.2 gene may function as one of the regulators of IGS and Trp biosynthesis in Chinese cabbage.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2020, 19, 1; 85-95
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensitive detection of acetylene by second derivative spectra with tunable diode laser absorption spectroscopy
    Autorzy:
    Deng, H.
    Sun, J.
    Li, P.
    Liu, Y.
    Yu, B.
    Li, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/174963.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    tunable diode laser absorption spectroscopy
    TDLAS
    signal processing
    Savitzky–Golay filter
    trace gas detection
    Opis:
    A tunable diode laser absorption spectrometer was developed for trace acetylene gas analysis, the system performance was evaluated by combing an appropriate digital signal processing methods, i.e., Savitzky–Golay smoothing and differentiation algorithm. The calculation of the derivative spectra by this method is accompanied by simultaneous data smoothing. Based on the 2nd deriv- ative spectra detection method, the Allan variance technique indicates a C2H2 detection limit of 1.7ppm for 1-s averaging time, and a minimum noise level of 62ppb (parts per billion), at the optimum integration time of ~60s. The calculated 2nd derivative spectra with better resolution, lower detection limits, save signal processing time, and improve the ability to distinguish unresolved spectral signals.
    Źródło:
    Optica Applicata; 2016, 46, 3; 353-363
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fruit biomechanics based on anatomy: a review
    Autorzy:
    Li, Z.
    Yang, H.
    Li, P.
    Liu, J.
    Wang, J.
    Xu, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/24093.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Fruit biomechanics is needed for quality determination, multiscale modelling and engineering design of fruit processes and equipments. However, these determined fruit biomechanics data often have obvious differences for the same fruit or tissue. In order to investigate it, the fruit biomechanics based on anatomy was reviewed in this paper. First, the anatomical characteristics of fruit biomaterials were described at the macroscopic ‘tissue’ level and microscopic ‘cellular’ level. Subsequently, the factors affecting fruit biomechanics based on anatomy and the relationships between fruit biomechanics, texture and mechanical damage were summarised according to the published literature. Fruit biomechanics is mainly affected by size, number and arrangement of cells, quantity and volume of intracellular spaces, structure, thickness, chemical composition and permeability of cell walls, and pectin degradation level and turgor pressure within cells based on microanatomy. Four test methods and partial determined results of fruit biomechanics were listed and reviewed. The determined mechanical properties data of fruit are only approximate values by using the existing four test methods, owing to the fruit biomaterials being non-homogeneous and living. Lastly, further aspects for research on fruit biomechanics were proposed for the future.
    Źródło:
    International Agrophysics; 2013, 27, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physico-Mechanical Performance Evaluation of Large Pore Synthetic Meshes with Different Textile Structures for Hernia Repair Applications
    Ocena właściwości fizyko-mechanicznych syntetycznych chirurgicznych siatek przepuklinowych
    Autorzy:
    Liu, P.
    Shao, H.
    Chen, N.-L.
    Jiang, J.-H.
    Powiązania:
    https://bibliotekanauki.pl/articles/233556.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    hernia repair
    large-pore meshes
    physico-mechanical properties
    warp knitted meshes
    pore shape
    meshes with inlays
    przepuklina
    siatki o dużych porach
    właściwości fizykomechaniczne
    osnowowe siatki dzianinowe
    kształt porów
    siatki z wkładkami
    Opis:
    This paper studied the relationship between the textile structure of warp knitted hernia repair meshes and their physico-mechanical properties to solve the problem of hernia patch application evaluation and clear the mechanism of hernia patch structure-performance for clinical application. Six different prototypes of large pore meshes were fabricated, including four kinds of meshes with different pore shapes: H (hexagonal), D (diamond), R (round) and P (pentagonal); and two kinds of meshes with inlays: HL (hexagonal with inlays) and DL (diamond with inlays), using the same medical grade polypropylene monofilament. All meshes were designed with the same walewise density and coursewise density. Then the influence of other structural parameters on the physico-mechanical properties of the meshes was analysed. The physico-mechanical properties of these meshes tested meet the requirements of hernia repair, except mesh DL, whose tear resistance strength (12.93±2.44 N in the transverse direction) was not enough. Mesh R and P demonstrated less anisotropy, and they exhibited similar physico-mechanical properties. These four kinds of meshes without inlays demonstrated similar ball burst strength properties, but mesh HL and DL exhibited better ball burst strength than the others. All in all, uniform structures are expected to result in less anisotropy, and meshes with inlays, to some extent, possess higher mechanical properties. And the ratio of open loop number to closed loop number in a repetition of weave of fabric has marked effect on the physico-mechanical properties. Thus we can meet the demands of specific patients and particular repair sites by designing various meshes with appropriate textile structures.
    W pracy przeanalizowano zależność między strukturą chirurgicznych siatek przepuklinowych a ich właściwościami fizyczno-mechanicznymi. Opracowano sześć różnych prototypów siatek o dużych porach, w tym cztery rodzaje oczek o różnych kształtach porów: H (sześciokąt), D (romb), R (okrąg) i P (pięciokąt); oraz dwa rodzaje oczek z inkrustacją: HL (sześciokątne z inkrustacją) i DL (romb z inkrustacją), z wykorzystaniem tego samego monofilamentu z polipropylenu klasy medycznej. Wszystkie oczka zostały zaprojektowane z taką samą gęstością. Następnie analizowano wpływ pozostałych parametrów strukturalnych na właściwości fizyczno-mechaniczne oczek. Właściwości fizyczno-mechaniczne badanych siatek spełniają wymagania, z wyjątkiem siatki DL, której wytrzymałość na rozdarcie (12,93 ± 2,44 N w kierunku poprzecznym) nie była wystarczająca. Siatki R i P wykazywały mniejszą anizotropię i podobne właściwości fizyko-mechaniczne. Powyższe cztery rodzaje siatek bez inkrustacji wykazywały podobne właściwości wytrzymałości na pękanie, a siatki HL i DL wykazywały lepszą wytrzymałość na rozerwanie niż pozostałe. Stwierdzono, że jednolite struktury charakteryzują się mniejszą anizotropią, a siatki z inkrustacją, do pewnego stopnia, mają lepsze właściwości mechaniczne.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2018, 2 (128); 79-86
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multivariate information dynamic monitoring system application of tunnel construction process model test
    Zastosowanie systemu dynamicznego monitorowania wieloczynnikowej informacji podczas badania modelu procesu budowy tunelu
    Autorzy:
    Liu, Q.
    Chen, J.
    Wei, L.
    Huang, P.
    Luo, Y.
    Pu, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/231410.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tunel
    proces budowy
    informacja wieloczynnikowa
    monitorowanie dynamiczne
    badanie modelu
    tunnel
    construction process
    model test
    multivariate information
    dynamic monitoring
    Opis:
    Geomechnical model testing has been widely applied as a kind of research technique in underground engineering problems. However, during the practical application process, due to the influence of many factors, the desired results cannot be obtained. In order to solve this problem, based on the measurement requirements of the model test, combined with FBG(Fiber Bragg Grating) sensor technology and traditional measurement methods, an FBG monitoring system, Micro-multi-point displacement test system, resistance strain test system and surrounding rock pressure monitoring system are developed. Applying the systems to a model test of the tunnel construction process, the displacement in advance laws of tunnel face, radial displacement distribution laws and surrounding rock pressure laws are obtained. Test results show that a multivariate information monitoring system has the advantage of high precision, stability and strong anti-jamming capability. It lays a solid foundation for the real-time data monitoring of the tunnel construction process model test.
    Niniejsza praca omawia system dynamicznego monitorowania wieloczynnikowej informacji podczas badania modelu procesu budowy tunelu. Geometryczna metoda badania modelu jest skuteczną metodą badania poważnych problemów geotechnicznych, które wiążą się ze stosowaniem podobnych materiałów w pomieszczeniu, tworzeniem podobnych modeli na podstawie podobnych zasad oraz opierają się na obserwacji naprężeń, odkształceń i przemieszczeń wielowymiarowej informacji, w celu zrozumienia zjawiska mechanicznego i prawa stanu naprężeń i przemieszczeń na prototypie, aby osiągnąć cel realizacji geotechnicznego projektowania i budowy. Z uwagi na praktyczne, zaawansowane przemieszczenie w przedniej części tunelu oraz przemieszczenie samej powierzchni tunelu, pomiary są trudne do przeprowadzenia za pośrednictwem monitorowania. Możemy prowadzić skuteczną analizę i dyskusję dotyczącą słabej/uszkodzonej skały otaczającej przy użyciu podobnej geometrycznej metody badania modelu. Jednakże, badania modelu zależą od wielu czynników w rzeczywistym procesie zastosowania, przez co trudno jest osiągnąć pożądany efekt. Wśród nich, technologia pozyskiwania licznych informacji na temat dynamicznego monitorowania procesu badania stała się ważnym czynnikiem, ograniczającym rozwój geometrycznej metody badań modelu. Jak wiemy, mnogość informacji geometrycznej na temat metody badań modelu obejmuje napięcie, naprężenie, ciśnienie, przemieszczenie, itp. Mnogość informacji w procesie budowy tunelu, takich jak dynamiczne monitorowanie pierwszego przemieszczenia, przemieszczenie i tylne przemieszczenie powierzchni tunelu, jest rzadko analizowana. Jednakże, pomyślne zdobycie licznych informacji podczas budowy tunelu jest kluczem do sukcesu w badaniu modelu. Dlatego też, w celu zbadania systemu monitorowania wielu informacji w procesie budowy tunelu, należy uchwycić stan przekształcenia i naprężenia, jak również zwiększyć dokładność pomiarów i nie ma wątpliwości co do pełnego wykorzystania zalet technologii badań modelu. Na podstawie techniki monitorowania światłowodu, różnorodny zbiór informacji dla systemu monitorowania jest tworzony jako rdzeń systemu dynamicznego monitorowania światłowodu w czasie rzeczywistym. W połączeniu z wysokoprecyzyjnym mechanicznym i mikroprzemieszczającym miernikiem o typie kraty i innymi środkami, zgodnie z wymogami pomiarów badania modelu, system monitorowania licznych informacji został opracowany i skutecznie wykorzystany w procesie budowy tunelu. Wyniki badania modelu pokazują, że system może być stosowany do monitorowania procesu budowy tunelu, a ponadto jest zdolny do wychwytywania drobnych zmian i wartości fluktuacji komunikatów wielojednostkowych, jak również do tworzenia podwaliny dla powodzenia badania modelu.
    Źródło:
    Archives of Civil Engineering; 2016, 62, 3; 117-136
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical analysis of a hollow laser beam transmitting in an off-axis Cassegrain optical antenna system
    Autorzy:
    Mi, C
    Jiang, P
    Yang, H.
    Ke, S
    Li, B
    Liu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/174358.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Cassegrain optical antenna
    off-axis hollow laser beam
    receiving efficiency
    Opis:
    The optical model of a Cassegrain optical antenna with a confocal double-parabolic reflector structure has been designed, and the propagation characteristics of a hollow laser beam, which could avoid the loss of energy caused by the subreflector center reflection in the optical antenna, has been researched in this paper. By detailed analysis and numerical calculations of a receiving Cassegrain antenna with different deflection angles, the coupling efficiency curve and 3-D distributions of the receiving light intensity for different inclined angles have been obtained.
    Źródło:
    Optica Applicata; 2014, 44, 3; 421-431
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reliability analysis of electrohydraulic servo valve suffering common cause failures
    Analiza niezawodności serwozaworu elektrohydraulicznego narażonego na uszkodzenia spowodowane wspólną przyczyną
    Autorzy:
    Yang, Y.-J.
    Huang, H.-Z.
    Liu, Y.
    Zhu, S.-P.
    Peng, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/300830.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    EHSV
    common cause failures CCF
    FMECA
    β-factor model
    serwozawór elektrohydrauliczny (EHSV)
    uszkodzenia spowodowane wspólną przyczyną CCF
    analiza przyczyn
    skutków i krytyczności uszkodzeń (FMECA)
    model współczynnika β
    Opis:
    The electrohydraulic servo valve (EHSV) is widely used in many engineering fields. Its reliability is of great importance to the reliability and safety of entire servo control systems. With the aim of analyzing and evaluating reliability of EHSV, this paper firstly presents the physical structure and functional principle of EHSV. It is followed by the Failure Mode, Effects and Criticality Analysis (FMECA). From the analysis, the common cause failures (CCF) in the studied EHSV are identified. Lastly, a method that can quantitatively analyze reliability and failure rate of EHSV with considering the common cause failures is proposed. It is observed from the study that the failure rate of the EHSV with CCF is lower than the failure rate without considering CCF.
    Serwozawory elektrohydrauliczne (EHSV) mają szerokie zastosowanie w wielu dziedzinach inżynierii. Ich niezawodność ma decydujące znaczenie dla niezawodności i bezpieczeństwa całych układów sterowania serwomechanizmami. W celu analizy i oceny niezawodności zaworów EHSV, w pracy przedstawiono najpierw ich budowę fizyczną i zasadę działania. Następnie przeprowadzono analizę przyczyn, skutków i krytyczności uszkodzeń (FMECA). Na podstawie tej analizy określono uszkodzenia zaworu EHSV spowodowane wspólną przyczyną (CCF). Wreszcie, zaproponowano metodę, za pomocą której można ilościowo analizować niezawodność i awaryjność EHSV z uwzględnieniem uszkodzeń spowodowanych wspólną przyczyną. Badania wykazały, że awaryjność EHSV przy uwzględnieniu CCF jest niższa niż w wypadku nieuwzględnienia CCF.
    Źródło:
    Eksploatacja i Niezawodność; 2014, 16, 3; 354-359
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wavelength-adjustable all-optical wavelength conversion using a tunable fiber laser and an electroabsorption modulator
    Autorzy:
    Tseng, C.-L.
    Lin, Y.-W.
    Ching, P.-J.
    Cheng, Y.-T.
    Jou, J.-J.
    Liu, C.-K.
    Powiązania:
    https://bibliotekanauki.pl/articles/174311.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wavelength conversion
    fiber ring laser
    erbium-doped fiber
    electroabsorption modulator
    wavelength division multiplexing (WDM) network
    Opis:
    A wavelength conversion scheme is presented experimentally using a wavelength tunable erbium-doped fiber laser as a probe light source and an electroabsorption modulator with a DC bias only.For the input wavelength of 1557nm with a 10-Gb/s non-return to zero signal, the Q value is 10.6and the power penalty is less than 1.5dB at a bit error rate of 10–9 at the probe wavelength of1560nm. Given a fixed Q value of 6, probe wavelengths cover a range of 25nm. Furthermore,the relationship between the range of probe wavelength and the amount of power penalty is alsoinvestigated.
    Źródło:
    Optica Applicata; 2016, 46, 3; 347-352
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous extraction of vanadium and chromium from vanadium slag using low-pressure liquid phase oxidation method
    Autorzy:
    Xia, J.-P.
    Zheng, S.-L.
    Wang, S.-N.
    Liu, B.
    Zou, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/110818.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    vanadium slag
    low pressure leaching
    liquid phase oxidation
    kinetics
    Opis:
    A low-pressure liquid oxidation method was proposed and proven to be effective to extract vanadium and chromium simultaneously from the vanadium slag in concentrated NaOH aqueous solutions. The effect of temperature, NaOH mass concentration, liquid-to-solid mass ratio, stirring speed and pressure on the extraction of vanadium and chromium in NaOH aqueous solutions were systematically investigated. Under the optimal reaction conditions (temperature of 473 K, liquid-to-solid mass ratio of 6:1, stirring speed of 700 rpm, NaOH mass concentration of 50%, pressure of 1 MPa and reaction time of 180 min), the vanadium and chromium recovery reached 95% and 90%, respectively. It was found that the reaction temperature and NaOH concentration were important factors for the extraction of vanadium and chromium. The kinetics of the decomposition of vanadium slag in concentrated NaOH aqueous under low pressure was analyzed using the shrinking core model, and the results indicated that the extraction of vanadium and chromium were both governed by the internal diffusion step, with apparent activation energies calculated to be 26.22 and 32.79 kJ/mol, respectively.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 2; 609-619
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of three species commonly known as“daqingye” by internal leaf anatomy and high-performance liquid chromatography analyses
    Autorzy:
    Zhang, Y.
    Zhu, Y.
    Chen, J.
    Xia, C.
    Deng, J.
    Li, H.
    Li, Y.
    Li, J.
    Liu, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/59301.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    The macroscopic and microscopic morphologies and indigo and indirubin concentration of the traditional Chinese medicine herbs Isatis indigotica Fort., Polygonum tinctorium Ait., and Baphicacanthus cusia (Nees) Bremek, all commonly known as “daqingye”, were determined and compared. The morphological analyses indicated that I. indigotica has leaves with winged petioles and no glandular hairs or crystals, P. tinctorium has leaves with membranous ocrea and clusters of calcium oxalate, and B. cusia has palisade cells in the mesophyll running over the main vein and single cells containing calcium carbonate crystals. Indigo and indirubin are chemical constituents that have been previously isolated from daqingye and were selected in this study as identification markers for high-performance liquid chromatography analysis due to their pharmacological activities. The chromatographic results showed that indigo and indirubin concentration varied significantly among the three species: high concentration of both indigo and indirubin were observed in I. indigotica, the highest concentration among the three daqingye plants was found in P. tinctorium but with low levels of indirubin, and the concentration of indigo and indirubin was quite low in B. cusia. In summary, three different species commonly known as daqingye were accurately distinguished by morphological observation, internal leaf anatomy analysis, and chromatographic analysis.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2018, 87, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ethnobotanical study on medicinal plants used by Li people in Ledong, Hainan Island, China
    Autorzy:
    Huang, W.
    Li, P.
    Liu, Y.
    Ju, Y.
    Wang, J.
    Ntumwel, C.B.
    Long, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/57864.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    ethnobotany
    traditional knowledge
    ethnomedicine
    medicinal plant
    Li ethnic group
    ethnic group
    Ledong county
    Hainan Island
    China
    Opis:
    The paper documents on the uses of traditional medicinal plants used for treating human ailments in three villages of Ledong, a county inhabited by Liethnic group in the southwest of Hainan Province, China. Semi-structured interviews, key informant interviews and participatory observations were used to collect ethnobotanical data from February to March 2012 and in July 2013. The data collected was analyzed using descriptive statistics. Thirty native knowledgeable people were interviewed. The Li community uses 50 plant species in 36 families for medicinal purposes. The most common medicinal plant families were Leguminosae (14%), Compositae (6%), and Euphorbiaceae (6%), and the most common preparations methods were decoction (84%), crushing (38%), and poultice (34%). The traditional medicinal plants were mainly used for hemostasis (12.9%), body pains (11.4%), gastrointestinal disorders (11.4%), and trauma (10%). Twenty-four species of medicinal plants (48%) have never been reported in the literature of Li medicines. In addition, 22 species (44%) have already been studied by researchers and their extracts or compounds were good bioactives. However, the rapid socioeconomic development in the county is the main threat to the conservation of Li medicine and has resulted in the decrease in the abundance and use of medicinal plants and associated traditional knowledge. Other factors accounting for a decrease in the use of Li medicinal plants like loss of plant diversity, change of land use, and threatened traditional knowledge were equally discussed.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2016, 85, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laboratory investigation of self-healing properties on geosynthetic clay liners with flaw
    Autorzy:
    Zhang, G.-W.
    Zhang, H.-Y.
    Wang, J.-F.
    Zhou, L.
    Liu, P.
    Jiang, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/204652.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    landfills
    geosynthetic clay liner
    self healing
    hydraulic conductivity
    Opis:
    The objective of this paper is to evaluate the self- healing properties of a commercially-available geosynthetic clay liner (GCL) using flexible-wall permeameter. The GCLs are produced by the same factory, but the contents of bentonite are different. Also the hydraulic conductivities (HC) of GCLs with no defect are different. In this study, specimens were completely saturated under the backpressure of 20 kPa before the test. Permeability tests were performed on GCL specimens with penet rating flaw and also on specimens permeated with distilled water and CaCl2 solutions. The test results were presented and discussed. Experimental results showed that the GCL with penetrating flaw did not exhibit complete self-healing in the case of flaw. After 120 days, the hydraulic conductivity increased by approximately an order of magnitude. In addition, CaCl2 solutions had a significant influence on the hydraulic conductivity. The research findings might be of interest to researchers and engineers who design liners for landfills and other liquid containment facilities.
    Źródło:
    Archives of Environmental Protection; 2015, 41, 1; 53-58
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seismic damage behaviour of aeolian sand reinforced concrete columns with I-shaped structural steel
    Autorzy:
    Wang, Y. H.
    Wang, H. Y.
    Wang, Y. P.
    Zhao, M.
    Qi, J.
    Huo, G. Z.
    Liu, P. Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/1849772.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    piasek eoliczny
    słup żelbetowy
    stal konstrukcyjna
    przekrój I
    zachowanie
    uszkodzenie sejsmiczne
    model uszkodzenia
    aeolian sand
    column
    I-shaped steel
    structural steel
    seismic damage
    behaviour
    damage model
    Opis:
    To promote the application of aeolian sand resources for steel-concrete composite structures, an aeolian sand reinforced concrete column with I-shaped structural steel is proposed in this study. Four specimens are designed and manufactured with different replacement rates of aeolian sand. The seismic behaviour and damage evolution process of the specimens are studied by low-cycle repeated loading tests. Based on the test results, the mechanical characteristics, failure modes, hysteresis curves, skeleton curves, energy dissipation capacity, displacement ductility, and stiffness degradation of the specimens with different replacement rates of aeolian sand are analysed. In addition, the effects of the design parameters on the seismic behaviour of the specimens are also studied. The results show that the indexes of the seismic behaviour can be significantly improved by adding steel. Moreover, a revised damage model is proposed, to better reflect the evolution law of seismic damage of aeolian sand reinforced concrete columns with steel. The proposed model can provide an important reference for seismic damage assessment of the columns.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 4; 633-650
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development and application of isothermal amplification methods for rapid detection of F4 fimbriae producing Escherichia coli
    Autorzy:
    Zhao, L.Y.
    Niu, J.H.
    Gao, X.L.
    Liu, C.N.
    Liu, S.M.
    Jiang, N.
    Lv, X.P.
    Zheng, S.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087340.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Escherichia coli
    F4 fimbriae
    isothermal amplification
    rapid detection
    clinical samples
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 1; 143-152
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photoelectron Emission Microscopy and its Application to the Study of Polymer Surfaces
    Autorzy:
    Cossy-Favre, A.
    Diaz, J.
    Anders, S.
    Padmore, H.
    Liu, Y.
    Samant, M.
    Stöhr, J.
    Brown, H.
    Russell, T. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964108.pdf
    Data publikacji:
    1997-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.16.Ms
    73.61.Ph
    64.75.+g
    Opis:
    The X-ray photoelectron emission microscopy at the Advanced Light Source has a spatial resolution of 0.2 microns at an accelerating voltage of 12 kV. The tunability of the photon energy is used to provide chemical state information using near edge X-ray absorption fine structure spectroscopy on the sub-micrometer scale. The homogeneity of thin films of polymer blends was studied for various film thicknesses. The polystyrene/polyvinylmethylether film of 194 Å showed protrusions of 2-3 μm diameter with an enriched polystyrene content while the polystyrene/polystyreneacrylonitrile 504 Å thick films showed 5-6 μm segregated regions without any topological structure.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 5; 923-927
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stable isotopic and mineralogical investigations of an arid Quaternary lacustrine palaeoenvironment, Western Qaidam, China
    Autorzy:
    Bojar, A. V.
    Rieser, A.
    Neubauer, F.
    Bojar, H. P.
    Genser, J.
    Liu, Y.
    Ge, X. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058952.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Qaidam
    Quaternary
    stable isotopes
    celestine
    carbonates
    hypersaline lacustrine environment
    Opis:
    Stable isotope analyses on carbonates from lake evaporites collected from the non-marine western Qaidam basin yield a positive excursion from Pliocene to Quaternary times. At Dafeng Shan, the Quaternary sequences are composed of alternating layers of celestine/dolomite and aragonite/calcite/barite with distinct isotopic compositions. The sequence described at Dafeng Shan formed in a low energy, hypersaline lacustrine environment as indicated by the microstructures and evaporitic minerals as well as by the absence of lithoclasts. The peloids, ooids and oncoids described are related to microbialactivities in saline lake. The oxygen isotopic composition of the carbonates vary between +34.4 and +39.8‰ (SMOW), representing the heaviest values measured until now. The δ18 O and the δ34 S isotopic composition of the celestine range between 20.1 to 22.3‰ (SMOW) and +19 to +22‰ (CDT) respectively, suggesting sulfur recycling via sulfide oxidation. The carbon isotopic compositions of the carbonates show a large negative excursion of up to -30‰. The microstructures, mineralogy and isotopic compositions as well as the geological context suggest oxidation of methane from a deep source.
    Źródło:
    Geological Quarterly; 2005, 49, 2; 173-184
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Validating performance based critical actions in a high tech start-up
    Autorzy:
    Vuoti, V. P.
    Takala, J.
    Mäntylä, A.
    Liu, Y.
    Yang, W.
    binti Abdul Malek, N. A.
    Kronman, P.
    Kreuzer, A.
    Zafar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/406824.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sustainable competitive advantage
    sense and respond
    manufacturing strategy index
    operations strategy
    balanced critical factor index
    operations start up
    case study
    Opis:
    The objective of this study is to analyze a Finnish manufacturing case company’s operational competitiveness. A proposed analytical model based on analyses the corresponding angles of the strategic triangles (Prospector, Analyzer, and Defender). The model compares the angle differences between the strategy and resource triangles with opinions from different management groups of informants. It was found out that Normalized Scaled Critical Factor Index (NSCFI) model is more scientific comparing to formal ones through validation. Calculations based on the MSI questionnaire resulted in medium high values for the Prospector strategy both for past- and future orientation. S&R calculations regarding the past orientation resulted in low values for all strategy types, except P-NSCFI for Analyzer. Moreover this study covers a case, in where Balanced Critical Factor Index (BCFI) was used defining company annual strategy plan.
    Źródło:
    Management and Production Engineering Review; 2014, 5, 1; 74-86
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a SYBR Green I real-time PCR assay for detection of novel porcine parvovirus 7
    Autorzy:
    Li, Y.D.
    Yu, Z.D.
    Bai, C.X.
    Zhang, D.
    Sun, P.
    Peng, M.L
    Liu, H.
    Wang, J.
    Wang, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087207.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Capsid gene
    PPV7
    SYBR Green I real-time PCR
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 1; 43-49
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Construction of a recombinant baculovirus expressing swine hepatitis E Virus ORF2 and preliminary research on its immune effect
    Autorzy:
    Yang, Z.
    Wang, K.
    Hu, Y.
    Yuan, P.
    Yang, Y.
    Xie, L.Y.
    Huang, S.L.
    Liu, J.
    Ran, L.
    Song, Z.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087759.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    swine HEV
    ORF2
    baculovirus
    immunogenicity
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 1; 47-54
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Bending, Impact Fracture Behavior and Characteristics of Stainless Steel Clad Plates with Different Rolling Temperature
    Autorzy:
    An, Q.
    Fan, K. Y.
    Ge, Y. F.
    Liu, B. X.
    He, J.
    Wang, S.
    Chen, C. X.
    Ji, P. G.
    Tolochko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049433.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stainless steel clad plate
    interface characteristics
    bending behavior
    impact morphologies
    delamination crack
    Opis:
    The interface characteristics, bending and impact behavior, as well as fracture characteristics of stainless steel clad plates fabricated by vacuum hot rolling at different rolling temperatures of 1100°C, 1200°C and 1300°C are investigated in detail. The interface bonding strength is gradually increased with the increasing rolling temperature due to the sufficient diffusion behavior of alloy element. The bending toughness and impact toughness are gradually decreased, while the bending strength increase with the increase of the rolling temperature, which is attributed to mechanisms of matrix softening and interface strengthening at high rolling temperature. Due to the weak interface at 1100°C, the bending and impact crack propagation path was displaced by delamination cracks, which in turn lead to reduction in stress intensity of the main crack, playing an effective role in toughening the stainless steel clad plates. Moreover, the impact fracture morphologies of clad plates show a typical ductile-brittle transition phenomenon, which is attributed to the matrix softening behavior with the increasing rolling temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 229-239
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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