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A Timetable of the Early Development Stage of Silkies Embryo
Li, B.C.,Chen, G.H.,Qin, J.,Wang, K.H.,Xiao, X.J.,Xie, K.Z.,Wu, X.S. Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.6
The early embryos are obtained in different time after the former egg had been laid, and the aim of the present study was to observe the development law of chicken early embryo.The embryo development has been divided into the two periods according to morphology of blastodisc. Cleavage period, from 5.5 h (0 h uterine age) to 15.5 h (10-10.5 h uterine age) after the former egg had laid, formation blastodisc of 6-7 layers cell. Later blastocyst period, from 17.5 h (12-12.5 h uterine age) to area pellucida formation after the former egg had been laid. The first division took place at 5 h (0 h uterine age), morular at 11.5 h (6-6.5 h uterine age), and blastocyst at 15.5 h (10-10.5 h uterine age) after the former egg had been laid.
Improved delay-dependent stability criteria for T-S fuzzy systems with time-varying delay
Zeng, H.B.,Park, J.H.,Xia, J.W.,Xiao, S.P. Elsevier [etc.] 2014 Applied Mathematics and Computation Vol.235 No.-
This paper is concerned with the robust stability of uncertain T-S fuzzy systems with time-varying delay. A novel Lyapunov-Krasovskii functional is established by employing the idea of combining delay-decomposition with state vector augmentation. Then, by employing some integral inequalities and the reciprocally convex approach, some less conservative delay-dependent stability criteria are obtained. The proposed stability conditions are formulated in the form of linear matrix inequalities (LMIs), which can be solved efficiently with Semi-Definite Programming (SDP) solvers. Finally, four numerical examples are provided to show that the proposed conditions are less conservative than existing ones.
W. B. Xiao,F. Y. Hu,X. D. He,H. M. Zhang,H. M. Wu 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.11
The characteristics of a solar cell, the short-circuit current (Isc), the open-circuit voltage (Voc), the maximum power point (Vm, Im), the fill factor (FF) and the photoelectric conversion efficiency () under different illumination intensities and shading areas have been experimentally investigated. The work factor ! is given by ! = (1 − A/A0) × S/S0, where A0 is the total solar cell area, A the shading area, S0 the benchmark reference irradiation level, and S the new level of the irradiation, is introduced to take the light intensity and shading area into account. The results show that Isc and Im increase on an approximately linear increasing way with !, but Voc and Vm approach the saturation levels. The reason is that the current is a linear function of !, and the relationship of the voltage to ! is logarithmic. We also found Isc (Vm) to depend more on ! than Im (Voc). In addition, we observed that tended to increase linearly with !, but FF tended to converge to saturation. The reason for the behavior of is the reduction in the contact resistance and in the electron-hole recombination with increasing !. However, FF is mainly determined by Voc. The improvement in the solar cell performance with increasing ! results from an increase in the current, but not in the voltage or the fill factor.
Zeng, H. B.,Park, J. H.,Xiao, S. P.,Liu, Y. Springer Science + Business Media 2015 Nonlinear dynamics Vol.82 No.1
<P>This paper is concerned with the problem of sampled-data control for master-slave synchronization of chaotic Lur'e systems with time delay. The sampling periods are assumed to be arbitrary but bounded. A new Lyapunov functional is constructed, in which the information on the nonlinear function and the actual sampling pattern have been taken fully into account. By employing the Lyapunov functional and a tighter bound technique to estimate the derivative of the Lyapunov functional, a less conservative exponential synchronization criterion is established by analyzing the corresponding synchronization error systems. Furthermore, the derived condition is employed to design a sampled-data controller. The desired controller gain matrix can be obtained by means of the linear matrix inequality approach. Simulations are provided to show the effectiveness and the advantages of the proposed approach.</P>
Y.G. Xiao,M.H. Tang,Y. Xiong,J. C. Lin,C.P. Cheng,B. Jiang,H.Q. Cai,Z.H. Tang,X.S. Lv,X.C. Gu,Y.C. Zhou 한국물리학회 2012 Current Applied Physics Vol.12 No.6
The surface potential and drain current of double-gate metal-ferroelectric-insulator-semiconductor (MFIS) field-effect transistor were investigated by using the ferroelectric negative capacitance. The derived results demonstrated that the up-converted semiconductor surface potential and low subthreshold swing S = 34 (<60 mV/dec) can be realized with appropriate thicknesses of ferroelectric thin film and insulator layer at room temperature. What’s more, a reduction gate voltage about 260 mV can be reached if the ON-state current is fixed to 600 mA/mm. It is expected that the derived results can offer useful guidelines for the application of low power dissipation in ongoing scaling of FETs.
Xiao, Q.,Zhang, H.,Choi, M.,Li, S.,Kondragunta, S.,Kim, J.,Holben, B.,Levy, R. C.,Liu, Y. Copernicus GmbH 2016 Atmospheric Chemistry and Physics Vol.16 No.3
<P>Abstract. Persistent high aerosol loadings together with extremely high population densities have raised serious air quality and public health concerns in many urban centers in East Asia. However, ground-based air quality monitoring is relatively limited in this area. Recently, satellite-retrieved Aerosol Optical Depth (AOD) at high resolution has become a powerful tool to characterize aerosol patterns in space and time. Using ground AOD observations from the Aerosol Robotic Network (AERONET) and the Distributed Regional Aerosol Gridded Observation Networks (DRAGON)-Asia Campaign, as well as from handheld sunphotometers, we evaluated emerging aerosol products from the Visible Infrared Imaging Radiometer Suite (VIIRS) aboard the Suomi National Polar-orbiting Partnership (S-NPP), the Geostationary Ocean Color Imager (GOCI) aboard the Communication, Ocean, and Meteorology Satellite (COMS), and Terra and Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) (Collection 6) in East Asia in 2012 and 2013. In the case study in Beijing, when compared with AOD observations from handheld sunphotometers, 51 % of VIIRS Environmental Data Record (EDR) AOD, 37 % of GOCI AOD, 33 % of VIIRS Intermediate Product (IP) AOD, 26 % of Terra MODIS C6 3 km AOD, and 16 % of Aqua MODIS C6 3 km AOD fell within the reference expected error (EE) envelope (±0.05 ± 0.15 AOD). Comparing against AERONET AOD over the Japan-South Korea region, 64 % of EDR, 37 % of IP, 61 % of GOCI, 39 % of Terra MODIS, and 56 % of Aqua MODIS C6 3 km AOD fell within the EE. In general, satellite aerosol products performed better in tracking the day-to-day variability than tracking the spatial variability at high resolutions. The VIIRS EDR and GOCI products provided the most accurate AOD retrievals, while VIIRS IP and MODIS C6 3 km products had positive biases. </P>
An Efficient Algorithm for Dynamic Shortest Path Tree Update in Network Routing
B. Xiao,지아농챠오,Z. Shao,E. H.-M. Sha 한국통신학회 2007 Journal of communications and networks Vol.9 No.4
Shortest path tree(SPT) construction is essential in high performance routing in an interior network using link state protocols. When some links have new state values, SPTs may be rebuilt, but the total rebuilding of the SPT in a static way for a large computer network is not only computationally expensive, unnecessary modifications can cause routing table instability. This paper presents a new update algorithm, dynamic shortest path tree(DSPT) that is computationally economical and that maintains the unmodified nodes mostly from an old SPT to a new SPT. The proposed algorithm reduces redundancy using a dynamic update approach where an edge becomes the significant edge when it is extracted from a built edge list Q. The average number of significant edges are identified through probability analysis based on an arbitrary tree structure. An update derived from significant edges is more efficient because the DSPT algorithm neglect most other redundant edges that do not participate in the construction of a new SPT. Our complexity analysis and experimental results show that DSPT is faster than other known methods. It can also be extended to solve the SPT updating problem in a graph with negative weight edges.