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Wyświetlanie 1-15 z 16
Tytuł:
Robust L2 consensus of high-order swarm systems with time-varying delays
Autorzy:
Xi, J
Yao, Z
Liu, G.
Zhong, Y.
Powiązania:
https://bibliotekanauki.pl/articles/205770.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
consensus
swarm system
uncertainty
time delay
disturbance rejection
Opis:
Consensus problems for high-order continuous-time swarm systems in directed networks with time delays, uncertainties and external disturbances are investigated. Firstly, the state space of a swarm system is decomposed into a consensus subspace (CS) and a complement consensus space (CCS). A necessary and sufficient condition for the system with time delays and uncertainties to achieve consensus is presented based on the state projection on CCS, and an explicit expression of the consensus function is shown on the basis of the state projection on CS. Then, a sufficient condition for the system to achieve consensus with a desired L2 performance is given. Finally, numerical simulations are shown to demonstrate theoretical results.
Źródło:
Control and Cybernetics; 2014, 43, 1; 59-77
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential risk of Mesodinium rubrum bloom in the aquaculture area of Dapeng’ao cove, China: diurnal changes in the ciliate community structure in the surface water
Autorzy:
Liu, H.
Song, X.
Huang, L.
Tan, Y.
Zhong, Y.
Huang, J.R.
Powiązania:
https://bibliotekanauki.pl/articles/47949.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
potential risk
Mesodinium rubrum
bloom
aquaculture area
Dapeng'ao cove
China
diurnal change
ciliate community
surface water
heavy rainfall
water column
stratification
irradiance
Opis:
Diurnal changes in the structure of the ciliate community in surface waters were studied in the aquaculture area of Dapeng’ao cove, China. Two periods of heavy rainfall occurred during the study period, intensifying water column stratification and influencing the water’s properties. A total of 21 ciliate taxa from 15 genera were identified; the dominant species was Mesodinium rubrum. The maximum abundance of M. rubrum reached 3.92×104 indiv. dm−3, contributing 95.1% (mean value) to the total ciliate abundance. Diurnal changes in M. rubrum abundance were highly variable, the driving force probably being irradiance and food availability. The results suggest that M. rubrum may form blooms in aquaculture areas when there is a suitable physical regime with enriched nutrients, which is potentially harmful to the fish-farming industry.
Źródło:
Oceanologia; 2012, 54, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of IL-1β, IL-6 and TNF-αin Sprague-Dawely rats’ atrophic thymus induced by lipopolysaccharide
Autorzy:
Zhong, Y.B.
Zhang, X.L.
Lv, M.Y.
Hu, X.F.
Li, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2087664.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lipopolysaccharide
pro-inflammatory cytokines
thymus atrophy
rat
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 3; 589-597
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Manifestations of sustainable development in China: based on policy study
Przejawy zrównoważonego rozwoju w Chinach: na podstawie analizy strategii politycznych
Autorzy:
Wu, Y.
Zhong, X.
Powiązania:
https://bibliotekanauki.pl/articles/2164632.pdf
Data publikacji:
2022
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
China
sustainable development
policy
strategy
cooperation
Opis:
Subject and purpose of work: This article aims to better understand China’s actions and challenges encountered in sustainable development due to the COVID-19 crisis, economic difficulties, and the war between Russia and Ukraine. It also aims to provide valuable recommendations for China or other countries concerning future sustainable development work. Materials and methods: We reviewed extensive literature and made a policy content analysis as the research methodology. Results: We concluded that China has put emphasis on sustainable development since ancient times. China has made notable progress in sustainable development both domestically inside China and worldwide. However, China also faces challenges related to sustainable development within China itself. Conclusions: Although China has launched effective policies that have received positive feedback, there is still a long way to go to achieve truly sustainable development. We suggest that all countries, regions, and individuals take a joint action in order to achieve a sustainable planet for us and future generations.
Źródło:
Economic and Regional Studies; 2022, 15, 3; 269-283
2083-3725
2451-182X
Pojawia się w:
Economic and Regional Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving the stability of discretization zeros with the Taylor method using a generalization of the fractional-order hold
Autorzy:
Zeng, C.
Liang, S.
Zhang, Y.
Zhong, J.
Su, Y.
Powiązania:
https://bibliotekanauki.pl/articles/330136.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
stability
discretization zeros
Taylor method
signal reconstruction
sampled data model
stabilność
dyskretyzacja
metoda Taylora
rekonstrukcja sygnału
model danych
Opis:
Remarkable improvements in the stability properties of discrete system zeros may be achieved by using a new design of the fractional-order hold (FROH) circuit. This paper first analyzes asymptotic behaviors of the limiting zeros, as the sampling period T tends to zero, of the sampled-data models on the basis of the normal form representation for continuous-time systems with a new hold proposed. Further, we also give the approximate expression of limiting zeros of the resulting sampled-data system as power series with respect to a sampling period up to the third order term when the relative degree of the continuous-time system is equal to three, and the corresponding stability of the discretization zeros is discussed for fast sampling rates. Of particular interest are the stability conditions of sampling zeros in the case of a new FROH even though the relative degree of a continuous-time system is greater than two, whereas the conventional FROH fails to do so. An insightful interpretation of the obtained sampled-data model can be made in terms of minimal intersample ripple by design, where multirate sampled systems have a poor intersample behavior. Our results provide a more accurate approximation for asymptotic zeros, and certain known results on asymptotic behavior of limiting zeros are shown to be particular cases of the ideas presented here.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2014, 24, 4; 745-757
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fluorescence Analysis as an Effective Method Used in Micro/Trace Explosive Detection
Autorzy:
Liu, Y.
Shu, Y.
Liu, Xue-yong.
Xiong, Y.
Zhong, Fa-chun.
Sun, Y.
Powiązania:
https://bibliotekanauki.pl/articles/358808.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
micro/trace explosive detection
fluorescence analysis
conjugated polymer
sensing materials
Opis:
There are many kinds of explosives, and their detection methods vary. Nitroaromatic compound is one of the composition of the explosives commonly used. The fuorescence will be quenched when they touch the fuorescent conjugated polymers. General methods for explosives detection have been summarized in this paper, in addition the application of novel fuorescence analysis technique in explosives detection has been introduced. Fluorescent conjugated polymer as chemical sensing material for explosive detection has been reviewed in detail, also a novel fuorescent sensing flm self-assembled by fuorescent small molecule pyrene and homogeneous fuoroimmunoassay have been presented briefy. The development of fuorescence analysis used in the area of determining explosives has been prospected.
Źródło:
Central European Journal of Energetic Materials; 2009, 6, 3-4; 303-311
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for improving the precision of on-line phase measurement profilometry
Autorzy:
Mao, Z
Cao, Y
Zhong, L
Cao, S
Powiązania:
https://bibliotekanauki.pl/articles/174406.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
information optics
Stoilov's algorithm
phase measuring profilometry (PMP)
on-line phase measurement profilometry (OPMP)
phase-shifting
pixel matching
Opis:
An on-line phase measurement profilometry based on improved Stoilov’s algorithm is proposed to measure the 3D shape of moving object. While only one frame sinusoidal grating is projected on the moving object, the equal phase-shifting step deformed patterns modulated by profile of the measured object can be captured at every equivalent moving distance of the measured object instead of digital phase-shifting. Stoilov’s algorithm is an equal phase-shifting step algorithm at an arbitrary phase-shifting step, which is suitable for on-line phase measurement profilometry. However, the arbitrary phase-shifting step of Stoilov’s algorithm depends on the captured deformed patterns, in which the digitized errors of digital light projector or CCD camera, and the disturbance of surrounding light could be introduced, it will lead to some abnormities in wrapped phase, such as the denominator in Stoilov’s algorithm could be zero, which could cause the reconstructed 3D profile of the measured object appear burr, distortion or aberration, even could not be reconstructed. So an on-line phase measurement profilometry based on improved Stoilov’s algorithm is proposed. The arbitrary phase-shifting step is retrieved by both pixel matching and fringe cycle calibration rather than the captured deformed patterns. Experiments verify the feasibility and effectiveness of the proposed on-line phase measurement profilometry.
Źródło:
Optica Applicata; 2015, 45, 1; 51-61
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Collaborative intelligence - definition and measured impacts on internetworked e-work
Autorzy:
Zhong, H.
Levalle, R. R.
Moghaddam, M.
Nof, S. Y.
Powiązania:
https://bibliotekanauki.pl/articles/406926.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
collaboration lifecycle management
computer-supported collaborative work
enterprise collaboration
intelligent control
resilience
collaborative control theory
Opis:
Internetworked e-Work is enabling new channels in cyber space for collaboration among physical and cyber agents, e.g., humans, robots, software agents. Research on Collaborative Control Theory (CCT) indicates that building and augmenting the Collaborative Intelligence (CI) of participants in cyber-physical networks can provide better support for achieving their individual and common goals. In spite of its rising significance and popularity, however, no clear and precise definition and universal quantitative measure has been proposed for the CI. In this article, we first formalize the CI by suggesting a formal definition, based on the definitions of its elements - collaboration and intelligence. We then propose a quantitative measure for the CI, adapted from the universal intelligence measure. For illustration, we analyze three recent collaborative e-Work studies at three different scales: (1) Telerobotenabled computer supported collaborative design; (2) Collaborative product line control in supply networks; (3) Demand and capacity sharing in multi-enterprise collaboration. From these case studies, common advantages such as work efficiency, network robustness and stability, service level, resource utilization, and collaboration cost are observed, analyzed, and translated into formal CI measures. Results indicate significant impacts of CI on the efficiency, effectiveness, and quality of collaborative activities in emerging e-Work networks.
Źródło:
Management and Production Engineering Review; 2015, 6, 1; 67-78
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrashort pulse propagation recording by using the transmission-type light in flight holography
Autorzy:
Fan, Y.
Li, J.
Zheng, S.
Lu, X.
Zhong, X.
Powiązania:
https://bibliotekanauki.pl/articles/174016.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
light in flight
visualization of pulse propagation
holography
Opis:
In this paper, the distortion of the reconstructed images of the propagating light pulse in transmission light-in-flight holography recording was analyzed. Based on the analysis model, for recording the wavefront more accurately, the optimized selection of relevant parameters was made. Furthermore, a cylindrical lens was introduced to correct the image distortion. Additionally, the light-in-flight recording of the wavefront changing during propagation was simulated.
Źródło:
Optica Applicata; 2017, 47, 2; 283-294
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-direction digital moving mask method for fabricating continuous microstructures
Autorzy:
Zhang, Z
Gao, Y
Luo, N
Zhong, K
Liu, Z
Powiązania:
https://bibliotekanauki.pl/articles/175088.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
multi-direction digital moving mask
superposition
quantization
Opis:
The multi-direction digital moving mask method, employing the superposition of the exposure along various moving directions, is developed for fabricating continuous microstructures. The mask pattern corresponding to each moving direction is determined by projecting the target dose profile in the corresponding moving direction. All the mask patterns are dynamically exposed on the same substrate layer by layer so as to form a 3D profile of the exposure dose. The selection criterion of a quantization number and moving-direction number is discussed. For verification of the multi-direction moving method, experiments are performed to fabricate a square pyramid array and square-based microlens array by moving along two orthogonal directions, and round-based microlens array by moving along six directions.
Źródło:
Optica Applicata; 2015, 45, 1; 79-88
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Practical issues in frequency disturbance recorder design for wide-area monitoring
Autorzy:
Xu, Ch.
Zhong, Z.
Centeno, V.
Conners, R.
Liu, Y.
Powiązania:
https://bibliotekanauki.pl/articles/262637.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
power system
wide-area monitoring
phasor analysis
frequency tracking
Opis:
To maintain power system operation in a balanced and stable condition, the frequency deviation and the rate of frequency change information are highly desired in monitoring and protection applications of the power grid. How to obtain frequency information more accurately and efficiently has been the topic discussion for decades. PMUs (Phaser Measurement Unit) are the most widely-used devices for measuring phase angle differences and they also provide very accurate frequency information. However, the high installation cost of PMUs limits their applications for wide area control and stability analysis of power system. Thanks to commercial GPS receivers and the fast developments in Ethernet networks, an affordable wide area, quasi real-time, GPS synchronized frequency measurement is now possible. This paper introduces a portable networked Frequency Disturbance Recorder (FDR) device, which can be used at any 110V wall outlet and transmit measured frequency data remotely via the Ethernet. The practical issues and challenges of the device design and implementation are analyzed and discussed. Based on these low cost FDRs, a US-wide Frequency Network (FNET) has been implemented at Virginia Tech and some power system monitoring applications are being developed by taking fully advantage of the FDRs.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2005, 11, 1; 69-76
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low atmospheric density measurement based on Rayleigh scattering of an ultraviolet laser
Autorzy:
Wang, R
Yao, J.
Zhong, K.
Miao, Y.
Cui, H.
Zhao, X.
Zhang, C.
Powiązania:
https://bibliotekanauki.pl/articles/174910.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
atmospheric density measurement
Rayleigh scattering
ultraviolet laser
Opis:
The qualitative measurement of low atmospheric density in the air flow field has been investigated in this paper. The supersonic flow field with Mach number of 1.5 around the NACA0006 aerofoil has been numerically simulated and the transient slight pressure and low density atmosphere have been experimentally determined based on Rayleigh scattering of a 266 nm ultraviolet laser. The scattering patterns have been effectively captured under different atmospheric pressure of 4.5, 92, 470 and 710 Pa with laser energy of only 0.5 mJ. It has been demonstrated that in the pressure range from 4.5 to 1100 Pa, corresponding to the atmospheric density from 4.8105×10–5 kg/m3 to 1.279×10–2 kg/m3, the scattering intensity of an ultraviolet laser is linear to the pressure and density with the slope coefficient of 0.00968 a.u./Pa and 0.83226 a.u./(kg/m3×10–3). It has been proved that Rayleigh scattering is a promising technology for observation of instantaneous and multidimensional distribution of a supersonic flow field.
Źródło:
Optica Applicata; 2013, 43, 3; 597-605
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Coated Ammonium Dinitramide on the Properties of Nitrate-ester Plasticized Polyether Solid Rocket Propellants
Autorzy:
Pang, W. Q.
Li, J. Q.
DeLuca, L. T.
Ke, W.
Fu, X. L.
Zhong, F. X.
Li, H.
Ji, Y. P.
Powiązania:
https://bibliotekanauki.pl/articles/358292.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
energetic materials
NEPE composite solid propellants
ADN
hazardous properties
combustion characteristics
Opis:
Several industrial and research types of nitrate-ester plasticized polyether (NEPE) solid propellants were experimentally analyzed. In general, their compositions differed in the mass fraction of ammonium dinitramide (ADN), which was used as a promising highly energetic filler, as an alternative to ammonium perchlorate (AP). ADN exhibits high performance, low signature and non-polluting characteristics. The propellant composition without ADN, but with AP, was used as the reference. The microstructure and granularity distribution of the uncoated and coated ADN particles were experimentally analyzed. It was found that uncoated ADN particles exhibited irregular shape, while the ADN particles after coating are spherical. Because of their irregular shape, uncoated ADN particles caused inferior processability of the propellant slurry when added to the propellant formulation. Consequently, the NEPE propellants with coated ADN were studied in further detail. The rheological properties, energetic properties, mechanical sensitivities and combustion properties (burning rate and pressure exponent) of the NEPE propellants with coated ADN were studied and compared with the reference NEPE propellant. The addition of ADN particles to the propellant formulations increased the standard theoretical specific impulse and heat of explosion of the propellants, while decreasing the density. The propellants containing ADN particles were much more sensitive to impact and friction compared to the reference sample. Moreover, increasing the ADN mass fraction in the propellant formulation can significantly affect the combustion behaviour and increase the burning rate and pressure exponent compared to of the reference formulation. However it appears that ADN is a very promising candidate as a new energetic material in compositions of NEPE propellants, although several important questions concerning ADN’s suitability, especially in the context of its sensitivity to friction and impact, remain to be answered.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 4; 590-609
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of serum adiponectin and leptin in healthy perinatal dairy cows or cows with ketosis, and their effectson ketosis involved indices
Autorzy:
Shen, L.
Qian, B.
Xiao, J.
Zhu, Y.
Hussain, S.
Deng, J.
Peng, G.
Zuo, Z.
Zou, L.
Yu, S.
Ma, X.
Zhong, Z.
Ren, Z.
Wang, Y.
Liu, H.
Zhou, Z.
Cai, D.
Hu, Y.
Zong, X.
Cao, S.
Powiązania:
https://bibliotekanauki.pl/articles/2087289.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adiponectin
dairy cows
ketosis
leptin
perinatal period
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 3; 373-381
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of hadronic rescattering on the elliptic flow after the hydrodynamics model
Autorzy:
Ma, G.
Ma, Y.
Sa, B.
Cai, X.
He, Z.
Huang, H.
Long, J.
Shen, W.
Zhong, Ch.
Chen, J.
Zuo, J.
Zhang, S.
Shi, X.
Powiązania:
https://bibliotekanauki.pl/articles/148372.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
elliptic flow
hydrodynamic model
hadronic rescattering
LUCIAE model
Opis:
Abstract A hydrodynamics + hadronic rescattering model is used to simulate Au+Au collisions at 200 GeV and a Cooper-Frye method is adopted for hadronization. The effect of hadronic rescattering on elliptic flow V2 in 20 40% Au+Au collisions at 200 GeV has been investigated. It is found that the hadronic rescattering can suppress elliptic flow V2 and makes an asymmetric system in momentum space tend to be less anisotropic. The suppression effect becomes weak with increasing transverse momentum. In addition, the effect of hadronic rescattering on transverse momentum spectra and anisotropy of hadronic coordinate space is presented.
Źródło:
Nukleonika; 2006, 51,suppl.3; 21-27
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
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