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Xianwen Gu,Aiping Zhang 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.10
The coordinated development of industrialization, informatization, urbanization and agricultural modernization is one of the important concerns in today's China. This paper constructs a set of 4 categories and 16 indicators of evaluation system to measure the development level of industrialization, informatization, urbanization and agricultural modernization of 31 provinces, municipalities and autonomous regions in China. Based on this, provincial coupling level and coordinated development level of four modernizations are calculated by the coupling degree model and the coordinated development degree model. It discovers that the coupling degree and the coordinated development degree of the whole nation and east, central and west China have a significant rise between 2003 and 2012. In general, the coordinated development level of east China is high and that of central and west China is low. By dividing coordination level of all provinces, it discovers that the number of uncoordinated development provinces is decreasing and that of coordinated development provinces is increasing. And eastern provinces are in a leading position.
( Xianwen He ),( Gaoqi Dou ),( Jun Gao ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.8
In this paper, we investigate an individual channel estimation problem for multiple-input multiple-output (MIMO) two-way amplify-and-forward (AF) relay networks. To avoid self-interference during the estimation of the individual MIMO channels, a novel blind interference cancellation (BIC) approach is proposed based on an orthogonal preceding framework, where a pair of orthogonal precoding matrices is utilized at the source nodes. By designing an optimal decoding scheme, we propose to decompose the bidirectional transmission into a pair of unidirectional transmissions. Unlike most existing approaches, we make the practical assumption that the nonreciprocal MIMO channel and the mutual interference of multiple antennas are both taken into consideration. Under the precoding framework, we employ an orthogonal superimposed training strategy to obtain the individual MIMO channels. However, the AF strategy causes the noise at the terminal to be the sum of the local noise and the relay-propagated noise. To remove the relay-propagated noise during the estimation of the second-hop channel, a partial noise-nulling method is designed. We also derive a closed-form expression for the total mean square error (MSE) of the MIMO channel from which we compute the optimal power allocation. The simulation results demonstrate that the analytical and simulated curves match fully.
Wenhai Qi,Xianwen Gao 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.6
The paper is concerned with the problem of positive L1-gain filter design for positive continuous-timeMarkovian jump systems with partly known transition rates. Our aim is to design a positive full-order filter such thatthe corresponding filtering error system is positive and stochastically stable with L1-gain performance. By applyinga linear co-positive Lyapunov function and free-connection weighting vectors, the desired positive L1-gain filter isprovided. The obtained theoretical results are demonstrated by numerical examples.
L1 Control for Positive Markovian Jump Systems with Partly Known Transition Rates
Wenhai Qi,Xianwen Gao 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.1
This paper deals with the problem of L1 control for positive Markovian jump systems with partly knowntransition rates. First, by constructing an appropriate linear co-positive type Lyapunov-Krasovskii function, stochasticstability for the underlying system is discussed. Then, the L1-gain performance is analyzed. Based on the resultsobtained, an effective method is proposed for the design of state feedback controller. All the proposed conditionsare derived to ensure that the closed-loop Markovian jump system positive and stochastically stable with L1-gainperformance in linear programming. Finally, an example is given to demonstrate the validity of the main results.
Lian Lian,Xianwen Gao,Wenhai Qi 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.3
The paper is concerned with the problem of H∞ control for stochastic time-delayed Markovian switchingsystems with partly known transition rates and input saturation. By employing more appropriate Lyapunov-Krasovskii functional, a state feedback controller is designed to guarantee stochastic stability of the correspondingclosed-loop system with H∞ performance. A linear matrix inequality approach is employed to obtain the controllergain matrix. Two illustrative examples are provided to show the potential of the proposed techniques.
Minxiu Zhang,Xianwen Deng,Zhixun Xie,Yanfang Zhang,Zhiqin Xie,Liji Xie,Sisi Luo,Qing Fan,Tingting Zeng,Jiaoling Huang,Sheng Wang 대한수의학회 2022 Journal of Veterinary Science Vol.23 No.5
Background: Chicken anemia virus (CAV) causes chicken infectious anemia, which results in immunosuppression; the virus has spread widely in chicken flocks in China. Objectives: The aim of this study was to understand recent CAV genetic evolution in chicken flocks in Guangxi Province, southern China. Methods: In total, 350 liver samples were collected from eight commercial broiler chicken farms in Guangxi Province in southern China from 2018 to 2020. CAV was detected by conventional PCR, and twenty CAV complete genomes were amplified and used for the phylogenetic analysis and recombination analysis. Results: The overall CAV-positive rate was 17.1%. The genetic analysis revealed that 84 CAVs were distributed in groups A, B, C (subgroups C1-C3) and D. In total, 30 of 47 Chinese CAV sequences from 2005-2020 belong to subgroup C3, including 15 CAVs from this study. There were some specific mutation sites among the intergenotypes in the VP1 protein. The amino acids at position 394Q in the VP1 protein of 20 CAV strains were consistent with the characteristics of a highly pathogenic strain. GX1904B was a putative recombinant. Conclusions: Subgroup C3 was the dominant genotype in Guangxi Province from 2018–2020. The 20 CAV strains in this study might be virulent according to the amino acid residue analysis. These data help improve our understanding of the epidemiological trends of CAV in southern China.
The Optimization Algorithm for the Pathfinder Sea Surface Temperature in the East China Seas
Dehai Song,Xianwen Bao,Xiao Hua Wang,Wen Wu 한국해양과학기술원 2009 Ocean science journal Vol.44 No.1
Based on the analysis of the quality level in a Pathfinder 4km daily nighttime Sea Surface Temperature product (PFSST) in the East China Seas (ECS) from 1985 to 2004, the proportion of high-quality data was lower than that in the global level. Additionally, the PFSST maps showed clearly the void and anomaly data impacted by atmospheric contamination. In order to solve the above problem, an optimal algorithm was established through introducing the structure function, setting up the daily first-guess sea surface temperature (SST) field and taking PFSST product of the highest quality as reference points. Comparisons were done between this optimally interpolated SST and the selected original PFSST and the simultaneous in situ measurements. It illustrated it was possible to exactly estimate the SST values in the ECS during the recent two decades. The mean bias error and the root mean square error between data sets optimally evaluated and in situ observed were lower than those between the previous global estimations and in situ measurnments. Based on the analysis of the quality level in a Pathfinder 4km daily nighttime Sea Surface Temperature product (PFSST) in the East China Seas (ECS) from 1985 to 2004, the proportion of high-quality data was lower than that in the global level. Additionally, the PFSST maps showed clearly the void and anomaly data impacted by atmospheric contamination. In order to solve the above problem, an optimal algorithm was established through introducing the structure function, setting up the daily first-guess sea surface temperature (SST) field and taking PFSST product of the highest quality as reference points. Comparisons were done between this optimally interpolated SST and the selected original PFSST and the simultaneous in situ measurements. It illustrated it was possible to exactly estimate the SST values in the ECS during the recent two decades. The mean bias error and the root mean square error between data sets optimally evaluated and in situ observed were lower than those between the previous global estimations and in situ measurnments.