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Wyświetlanie 1-15 z 607
Tytuł:
Remarks on Statistical Design Centering
Autorzy:
Opalski, L. J.
Powiązania:
https://bibliotekanauki.pl/articles/226467.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
statistical design centering
design yield
realistic worst-case design
stochastic approximation
propagation of variance
Monte Carlo simulation
Opis:
The paper overviews optimization based statistical design centering techniques for analog circuits. Emphasis is placed on dependence between formulation of quality indices, problem formulation, and computational complexity of design centering algorithms, executed in single- or multiple-processor environments. For characterization of solution techniques a standard CMOS op-amp design case and a simplified computational complexity analysis are used.
Źródło:
International Journal of Electronics and Telecommunications; 2011, 57, 2; 159-167
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Serpent
Autorzy:
Marciniak, K.
Kern, L. J.
Powiązania:
https://bibliotekanauki.pl/articles/702603.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
CARMEN FIGURATUM
LATIN
POETRY
Opis:
A Latin translation of the famous 'carmen figuratum' by the Polish Ogden Nash.
Źródło:
Meander; 2005, 60, 2; 278
0025-6285
Pojawia się w:
Meander
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiędzy doświadczeniem zależności a psychozą.Problem podmiotu w fenomenologii J.-L. Mariona
Autorzy:
Bursztyka, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/2100454.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kontr-doświadczenie
donacja
fenomenalizacja
doświadczenie
zależności
olśnienie
oddany
psychoza
Opis:
Wychodząc od kategorii kontr-doświadczenia, autor analizuje konsekwencje, jakie ma ona dla rozumienia skończoności człowieka w perspektywie fenomenologii donacji, uprawianej przez J.-L. Mariona. Skończoność wyraża się tu w nierzadko bolesnym zderzeniu z nadmiarem tego, co się udziela, i wiąże z koniecznością nieustannie ponawianego wysiłku dania świadectwa temu doświadczeniu, nieustannego poszukiwania nowych, zawsze jedynie cząstkowych, a więc z konieczności nieadekwatnych, form jego artykulacji. Punktem dojścia jest próba wskazania możliwych implikacji, jakie koncepcja ta nasuwa dla opisu i rozumienia doświadczenia psychotycznego.
Źródło:
Przegląd Filozoficzny. Nowa Seria; 2017, 2; 195-212
1230-1493
Pojawia się w:
Przegląd Filozoficzny. Nowa Seria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical study on in-cylinder blending by means of a simultaneous direct injection of two liquid fuels in a heavy duty compression ignition engine
Autorzy:
Kapusta, Ł. J.
Teodorczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/175277.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dual fuel
injection
n-hexane
heavy duty engine
Opis:
Dual fuel combustion has been recently of high interest, mainly in terms of utilization of fuels different than diesel fuel in compression ignition engines. Depending on the properties of a fuel which is additional to diesel fuel, and the type of the additional fuel supply method the combustion process may be strongly modified comparing to single fuel combustion. Nowadays the modification of the combustion process becomes the reason for implementing the dual fuelling process. However, still the main reason for its implementation remains the utilization of nonconventional fuels in compression ignition engines. Among different types of dual fuel systems the one based on simultaneous direct injection of two fuels seems to be most flexible one. It allows to stratify the charge in the cylinder, blend two different fuels at any ratio and does not decrease volumetric efficiency. Therefore, this study aims at mixture formation in a heavy duty engine employing simultaneous direct injection of two different liquid fuels. Special attention was paid to spray breakup and simultaneous evaporation of two fuels which are the key processes in mixture formation.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2015, 128; 5-18
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
HRTF Adjustments with Audio Quality Assessments
Autorzy:
Yao, S. N.
Chen, L. J.
Powiązania:
https://bibliotekanauki.pl/articles/950215.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
HRTF
PEAQ
cone of confusion
headphones
surround
Opis:
There are an increasing number of binaural systems embedded with head-related transfer functions (HRTFs), so listeners can experience virtual environments via conventional stereo loudspeakers or head- phones. As HRTFs vary from person to person, it is difficult to select appropriated HRTFs from already existing databases for users. Once the HRTFs in a binaural audio device hardly match the real ones of the users, poor localization happens especially on the cone of confusion. The most accurate way to obtain personalized HRTFs might be doing practical measurements. It is, however, expensive and time consuming. Modifying non-individualized HRTFs may be an effort-saving way, though the modifications are always accompanied by undesired audio distortion. This paper proposes a flexible HRTF adjustment system for users to define their own HRTFs. Also, the system can keep sounds from suffering intolerable distortion based on an objective measurement tool for evaluating the quality of processed audio.
Źródło:
Archives of Acoustics; 2013, 38, 1; 55-62
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Automatic Synthesis of Musical Phrases from Multi-Pitch Samples
Autorzy:
Pluta, M.
Spalek, L. J.
Delekta, R. J.
Powiązania:
https://bibliotekanauki.pl/articles/177577.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sound synthesis
synthesis methods
sampling
Concatenative Sound Synthesis
Opis:
Sound synthesizers are a natural element of a musician’s toolset. In music arrangement, samplers can often produce satisfactory results, but it requires a combination of manual and automatic methods that may be arduous at times. Concatenative Sound Synthesis reproduces many of natural performance- and expression-related nuances but at a cost of high demand for processing power. Here, another method of musical phrase synthesis aimed at music arrangement is presented that addresses these and other related issues. Contrary to common practice, we propose to record and utilize sound samples containing not one, but short sequences of pitches. In effect, natural pitch transitions are preserved and phrases appear to be much smoother, despite using very limited set of performance rules. The proof-of-concept implementation of the proposed method is discussed in detail along with attempts at optimizing the final sound effects, based on auditory tests. The limitations and future applications of the synthesizer are also discussed.
Źródło:
Archives of Acoustics; 2017, 42, 2; 235-247
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Artificial bee colony based state feedback position controller for PMSM servo-drive – the efficiency analysis
Autorzy:
Tarczewski, T.
Niewiara, L. J.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/200239.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tuning
PMSM servo-drive
artificial bee colony algorithm
linear-quadratic optimization problem
pole placement
Opis:
This paper presents a state feedback controller (SFC) for position control of PMSM servo-drive. Firstly, a short review of the commonly used swarm-based optimization algorithms for tuning of SFC is presented. Then designing process of current control loop as well as of SFC with feedforward path is depicted. Next, coefficients of controller are tuned by using an artificial bee colony (ABC) optimization algorithm. Three of the most commonly applied tuning methods (i.e. linear-quadratic optimization, pole placement technique and direct selection of coefficients) are used and investigated in terms of positioning performance, disturbance compensation and robustness against plant parameter changes. Simulation analysis is supported by experimental tests conducted on laboratory stand with modern PMSM servo-drive.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 5; 997-1007
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of extended Kalman filter for estimation of periodic disturbance and velocity ripple reduction in PMSM drive
Autorzy:
Niewiara, Ł. J.
Tarczewski, T.
Grzesiak, L M.
Powiązania:
https://bibliotekanauki.pl/articles/201499.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
extended Kalman filter
disturbance estimation
PMSM drive
pulsating torque
velocity ripple reduction
Opis:
In this paper an application of extended Kalman filter (EKF) for estimation and attenuation of periodic disturbance in permanent magnet synchronous motor (PMSM) drive is investigated. Most types of disturbances present into PMSM drive were discussed and described. The mathematical model of the plant is presented. Detailed information about the design process of the disturbance estimator was introduced. A state feedback controller (SFC) with feedforward realizes the regulation and disturbance compensation. The theoretical analysis was supported by experimental tests on the laboratory stand. Both time- and frequency-domain analysis of the estimation results and angular velocity were performed. A significant reduction of velocity ripple has been achieved.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 5; 983-995
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Responsibility for words. Moral evaluation of language action
Odpowiedzialność za słowa. Moralna ocena działania językowego
Autorzy:
Rozmarynowska, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/2096357.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
responsibility for words
language action
effects of action
J.L. Austin
odpowiedzialność za słowa
działanie językowe
skutki działania
Opis:
The aim of the article is to examine the specific properties of language actions in terms of their moral evaluation. The author starts from the question whether responsibility for words has the same meaning as responsibility for a physical action. In her analysis, the author deliberates whether in both cases the same rules and criteria are applicable. Referring to the classical theory of speech acts proposed by John L. Austin, who introduced a fundamental division into constative and performative utterances and went on to distinguish illocutionary effects from perlocutionary consequences of speech acts, the author investigates how far a subject is responsible for the words he uses.
Źródło:
Przegląd Filozoficzny. Nowa Seria; 2019, 1; 167-178
1230-1493
Pojawia się w:
Przegląd Filozoficzny. Nowa Seria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-performance PMSM servo-drive with constrained state feedback position controller
Autorzy:
Tarczewski, T.
Skiwski, M.
Niewiara, L. J.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/200374.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
constrained control
model predictive approach
permanent magnet synchronous motor
position control
state feedback control
model predykcyjny
silnik synchroniczny z magnesem trwałym
sprzężenie zwrotne
Opis:
This paper describes high-performance permanent magnet synchronous motor (PMSM) servo-drive with constrained state feedback (SFC) position controller. Superior behavior of the control system has been achieved by applying SFC with constraints handling method based on a posteriori model predictive approach (MPAC). The concept utilizes predictive equations obtained from discrete-time model of the PMSM to compute control signals which generate admissible values of the future state variables. The novelty of the proposed solution lies in the limitation of several state-space variables in servo-drive control system. Since MPAC has firstly been applied to limit more than one state-space variable of the plant, necessary conditions for introducing constraints into multivariable control system with SFC are depicted. Due to the low complexity of proposed algorithm, a low cost microprocessor, STM32F4, is employed to execute the state feedback position control with model predictive approach to constraints handling. Experimental results show that the proposed control method provides superior performance of PMSM servodrive with modern SiC based voltage source inverter (VSI).
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 49-58
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Increased AST/ALT ratio in azotaemic dogs infected with Babesia canis
Autorzy:
Zygner, W.
Gojska-Zygner, O.
Norbury, L.J.
Wedrychowicz, H.
Powiązania:
https://bibliotekanauki.pl/articles/31893.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dog
animal disease
infection
Babesia canis
azotemia
canine babesiosis
babesiosis
kidney injury
protozoan parasite
Opis:
The AST/ALT ratio was estimated in 182 dogs infected with Babesia canis. Among these dogs 65 had anaemia and 68 were azotaemic. Student’s t test was used to compare means of the AST/ALT ratio in anaemic and non-anaemic dogs, and in azotaemic and non-azotaemic dogs (p < 0.05). The differences in AST/ALT ratio between anaemic (1.52 ± 1.15) and non-anaemic (1.76 ± 1.34) dogs were statistically insignificant (p = 0.23), however, the comparison of AST/ALT ratio between azotaemic (2.68 ± 1.52) and non-azotaemic (1.08 ± 0.53) dogs revealed a significantly higher value of this index in azotaemic dogs (p = 0.00). The present results suggest that kidney injury contributed to increased AST activity in these dogs.
Źródło:
Polish Journal of Veterinary Sciences; 2012, 15, 3
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The divine hiddenness argument. The state of debate
Argument z ukrycia. Obecny stan debaty
Autorzy:
Dobrzeniecki, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2096281.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hiddenness argument
theism
atheism
ultimism
theistic personalism
freewill defence
J.L. Schellenberg
argument z ukrycia
teizm
ateizm
ultymizm
personalizm teistyczny
obrona z wolnej woli
Opis:
The paper summarizes the debate concerning the divine hiddenness argument. First, it presents two versions of the argument that was initially formulated by J.L. Schellenberg and subsequently discussed over the last twenty years and it marks its most important theses. Then the author indicates some possible rebuttals, segregating them according to the challenged premises. Particularly noteworthy, he argues, are these theistic answers that accuse the images of God assumed by the hiddenness argument of excessive anthropomorphism and those that try to point out higher goods justifying divine hiddenness. In conclusion the author claims that the hiddenness argument proves atheism only if by theism one understands theistic personalism. Other positions, such as ultimism or theism of transcendence, are not threatened by the argument.
Źródło:
Przegląd Filozoficzny. Nowa Seria; 2019, 1; 17-32
1230-1493
Pojawia się w:
Przegląd Filozoficzny. Nowa Seria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of Phyllosticta hostae causing Phyllosticta leaf spot on spider lily in China
Autorzy:
Yi, R.H.
Gan, L.J.
Chen, J.
Xu, X.L.
Powiązania:
https://bibliotekanauki.pl/articles/66837.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Phyllosticta hostae
leaf spot
plant disease
spider lily
Hymenocallis littoralis
tropical plant
herb
China
Opis:
Leaf spot disease on the spider lily [Hymenocallis littoralis (Jacq.) Salisb.] continues to cause serious problems in China. To confirm the pathogen, the pathogenicity of isolates from diseased leaves was tested according to Koch’s postulates. The isolates were tentatively identified using morphological characteristics and confirmation was done by phylogenetic analysis of the translation elongation factor 1-alpha gene (TEF1), the actin gene (ACT), and internal transcibed spacer (ITS) sequences using neighbor-joining (NJ), maximum parsimony (MP), and Bayesian inference (BI) methods. The pathogen was identified as Phyllosticta hostae. Molecular analysis indicated very little diversity in the TEF1, ACT, and ITS gene. This is the first report of P. hostae causing leaf spot disease on spider lily in China.
Źródło:
Journal of Plant Protection Research; 2015, 55, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic Laser Interferometer And Vision Measurement System For Stripe Rod Calibration
Autorzy:
Zhao, M.
Huang, Q.-H.
Zhu, L.-J.
Qiu, Z.-M.
Powiązania:
https://bibliotekanauki.pl/articles/221047.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stripe edge
automatic control
laser interferometer
vision measurement
Opis:
In order to calibrate the stripe precision of a leveling rod, an automatic laser interferometer and a vision measurement system were designed by Xi’an University of Technology in China. The rod was driven by a closed-loop control and the data were collected at the stop state to ensure precision. The laser interferometer provided not only the long distance data but also a position feedback signal in the automatic control loop. CCD camera and a vision measurement method were used to inspect the stripe edge position and defect. Apixel-equivalent self-calibration method was designed to improve precision. ROI (regions of interest) method and an outline tracing method were designed to quickly extract multiple stripe edges. A combination of the image data with the interferometer data reduces control difficulty and ensures the measurement accuracy. The vision measurement method reached sub-pixel precision and the defective edges were reported. The system can automatically calibrate a stripe leveling rod with a high degree of efficiency and precision.
Źródło:
Metrology and Measurement Systems; 2015, 22, 4; 491-502
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 607

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