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| 1 | Robust fault detection for a class of nonlinear network control system with communication delay显示文摘To investigate a class of nonlinear network control system,a robust fault diagnosis method is presented based on the robust state observer.To access the objective that the designed robust filter is maximally tolerant to disturbances and sensitive to fault,the robustness and stability properties of the fault diagnosis scheme are established rigorously.Using the residual vector,a fault tolerant controller is established in order to guarantee the stability of the closed-loop system,and the controller law can be obtained by solving a set of linear matrix inequalities. Then,some relevant sufficient conditions for the existence of a solution are given by applying Lyapunov stability theory.Finally,a simulation example is performed to show the effectiveness of the proposed approach. | Ai Qiangyu Liu Chunsheng Jiang Bin | 2009 | Journal of Systems Engineering and Electronics2009，20，5： | 5 |
| 2 | Linking stoichiometric homoeostasis with ecosystem structure, functioning and stability显示文摘 | QiangYu QuanshengChen James J.Elser NianpengHe HonghuiWu GuangmingZhang JianguoWu YongfeiBai XingguoHan | 2010 | Ecology Letters2010，，11： | 2 |
| 3 | Emergency airport site selection using global subdivision grids显示文摘The occurrence of large-magnitude disasters has significantly aroused public attention regarding diversified site selection of emergency facilities.In particular,emergency airport site selection(EASS)is highly complicated,and relevant research is rarely conducted.Emergency airport site selection is a scenario with a wide spatiotemporal range,massive data,and complex environmental information,while traditional facility site selection methods may not be applicable to a large-scale time-varying airport environment.In this work,an emergency airport site selection application is presented based on the GeoSOT-3D global subdivision grid model,which has demonstrated good suitability of the discrete global grid system as a spatial data structure for site selection.This paper proposes an objective function that adds a penalty factor to solve the constraints of coverage and the environment in airport construction.Through multiple iterations of the simulated annealing algorithm,the optimal airport construction location can be selected from multiple preselected points.With experimental verifications,this research may effectively and reasonably solve the emergency airport site selection issue under different circumstances. | Bing Han Tengteng Qu Zili Huang Qiangyu Wang Xinlong Pan | 2022 | Big Earth Data2022，6，3： | 2 |
| 4 | Rate control in H.264 wireless video communication system显示文摘 | Qiangyu Zeng Xiaohai He Rui Lv Wei Wu | 2010 | COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering2010，，2： | 1 |
| 5 | Performance Improvement of Single Screw Compressor by Meshing Clearance Adjustment Used in Refrigeration System显示文摘The single screw compressor(SSC)is widely used in air compression and refrigeration systems due to its many advantages.The meshing clearance between the screw groove and gate rotor teeth flank has a significant influence on the compressor performance.In this paper,mathematical calculation models describing the internal working process of the SSC are established in order to evaluate the thermal dynamic characteristics of the compressor under varying meshing clearance heights.The refrigerating capacity,volume efficiency and adiabatic efficiency of the SSC are calculated and discussed.Three prototypes,with different meshing clearance heights,were manufactured to study the internal influence mechanisms.The theoretical model was verified using experimental data and the calculation results strongly agreed with the experimental results.Results demonstrate that comparisons of volume efficiency and adiabatic efficiency between the measured and calculated results exhibited deviations of 3.64%-7.98%and 5.92%-9.4%,respectively.Based on the models,analysis under varying meshing clearance heights and working conditions was performed.Taking into account working performance,actual manufacturing conditions and manufacturing cost limitations,a meshing clearance height range from 0.01 mm to 0.08 mm is suggested.This study can provide important theoretical data and experimental support for the design,manufacturing and optimization of single screw compressors. | LU Yuanwei LIU Shanwei WU Yuting LEI Biao ZHI Ruiping WEN Qiangyu MA Chongfang | 2021 | Journal of Thermal Science2021，30，1： | 1 |
| 6 | Studies on the Preparation of Polymer Spherical Symmetry GRIN Sphere and Controlling its Gradient Index Distribution显示文摘In this paper, a polymer spherical symmetry GRIN sphere lens were prepared by the suspension-diffusion-copolymerization(SDC) technique, selecting methyl methacrylate(MMA) as monomer M1 and acrylic 2,2,2-trifluoroethyl ester(3FEA) as M2. The radial distribution of refractive index of the lens was measured by the shearing interference method, which demonstrated that the quadratic refractive-index distribution was formed in the sphere lens, and its Δn=0.019. | RuXIA YuChuanZHANG YouMinYI ShiWeiSHI QunYANG QiangYU | 2004 | Chinese Chemical Letters2004，15，5： | 0 |
| 7 | Refined Spatialization of 10-Day Precipitation in China Based on GPM IMERG Data and Terrain Decomposition Using the BEMD Algorithm显示文摘Continuous high spatial-resolution 10-day precipitation data are essential for crop growth services and phenological research.In this study,we first use the bidimensional empirical mode decomposition(BEMD)algorithm to decompose the digital elevation model(DEM)data and obtain high-frequency(OR3),intermediate-frequency(OR5),and low-frequency(OR8)margin terrains.Then,we propose a refined precipitation spatialization model,which uses ground-based meteorological observation data,integrated multi-satellite retrievals for global precipitation measurement(GPM IMERG)satellite precipitation products,DEM data,terrain decomposition data,prevailing precipitation direction(PPD)data,and other multisource data,to construct China's high-resolution 10-day precipitation data from2001 to 2018.The decomposition results show mountainous terrain from fine to coarse scales;and the influences of altitude,slope,and aspect on precipitation are better represented in the model after topography is decomposed.Moreover,terrain decomposition data can be added to the model simulation to improve the quality of the simulation product;the simulation quality of the model in summer is better than that in spring and autumn,and is relatively poor in winter;and OR5 and OR8 can be improved in the simulation,with better OR5 and OR8 dynamically selected.In addition,preprocessing the data before precipitation spatialization is particularly important.For example,adding 0.01to the 0 value of precipitation,multiplying the small value of precipitation less than 1 by 10,and performing the normal distributions transform(e.g.,Yeo–Johnson)on the data can improve the simulation quality. | Xiaochen ZHU Qiangyu LI Yan ZENG Guanjie JIAO Wenya GU Xinfa QIU Ailifeire WUMAER | 2023 | Journal of Meteorological Research2023，37，5： | 0 |
| 8 | Epidemiological Survey of Primary Angle-Closure Glaucoma in Doumen显示文摘Purpose:To determine the prevalence of primary angle-closure glaucoma(PACG)in Doumen Countty,Guangdong province.Methods:Four villages from eight districts in doumen were selected by stratified,cluster and random sampling.Of a total of 1055people aged 45years or over,932(88.62)were examined.The examination and diagnostic criterion were similar to those of shunyi survey.Results:The prevalence of PACGin subjects over 45year of eye is0.64%,in those of shunyi survey.Results:The prevalence of PACG in subjects over 45year of eye is 0.64%,in those over 50years of age is 0.85%in Doumen,which is significantly lower than the corresponding figure of 1.99%inshunyi(P<0.05).Conclusion This study identifies the prevalence of PACG in Doumen is lower than in Shunyi. | QiangYu JingjingXu | 1995 | 眼科学报1995，11，1： | 0 |
| 9 | Enzymatic preparation of mono-and diacylglycerols:A review显示文摘Monoacylglycerols(MAGs) and diacylglycerols(DAGs) are partial glycerides widely used in food industry. They are safe and non-toxic food emulsifiers, especially for MAGs. MAGs account for approximately 75% of the total emulsifiers in food industry worldwide. DAGs are recognized as functional cooking oils, they can suppress body fat accumulation and postprandial serum triacylglycerols(TAGs) level. The traditional production of MAGs and DAGs is based on the chemical method, which requires high reaction temperature usually up to 200–260 ℃. Such high temperature is not suitable for oil containing heat sensitive polyunsaturated fatty acids. Enzymatic approach has been received increasing attentions. Enzymatic production of partial glycerides to replace chemical processes has been in industry, particularly for DAGs production as the products have been claimed as a functional and nutritional oil. Enzyme technology for the processing of oils and fats has been moved to industry step by step and case by case during the last 20 years. More and more applications are particularly moving into bulky oils and fats processing. At the same time, the cost of enzymes as a commercial product is reducing steadily. This review summarized the recent 15 years advances on the the enzymatic preparation of MAGs and DAGs. The critical process parameters under different reaction routes were presented and emphasized. The reaction media not only increased the homogeneity of the reaction system, but also shifted the reaction equilibrium towards the target product generation, and this part was stated in detail. In addition, the patent evaluation was included, and the application of MAGs and DAGs was covered. | Jiawei Zheng Yudong Liang Jiaxi Li Shuping Lin Qiangyue Zhang Kanghua Zuo Nanjing Zhong Xuebing Xu | 2023 | Grain & Oil Science and Technology2023，6，4： | 0 |
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