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Finite-time composite learning control for nonlinear teleoperation systems under networked time-varying delays

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Science china(Information sciences) 2024年第6期67卷 279-296页

作者： Yana YANG Huixin JIANG changchun HUA Junpeng LI institute of Electrical Engineering Yanshan University

The robust finite-time synchronization control problem is investigated for master-slave networked nonlinear telerobotics systems(NNTSs) in this article. Although there have been some research achievements on finite-time control for the NNTSs, these studies are based on the strong assumptions of communication time delays or can only achieve finite-time bounded convergence even when the external forces are *** and in view of the importance of these issues, a novel robust composite learning adaptive control scheme rendering the finite-time master-slave synchronization is proposed in this paper. In particular, the influence of time delays on finite-time convergence of the system is analyzed by employing the multi-dimension finite-time small-gain framework. Meanwhile, in order to achieve accurate and fast estimation of uncertain parameters of the system, both the online historical and the instantaneous data of the estimation data are explored to derive the new parameter adaptive law under a more realizable interval-excitation(IE) ***, the convergence of the position/force synchronization errors and the adaptive parameter estimation errors is obtained in finite time, and enhanced robustness of the closed-loop system will also be ***, the superior performance of the proposed control algorithms is validated by numerical simulations and hardware experiments.

关键词： networked teleoperation systems finite-time control exact parameter estimation small-gain theorem unknown communication delays

Characterizing structural variants based on graph-genotyping provides insights into pig domestication and local adaption

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Journal of Genetics and Genomics 2024年第4期51卷 394-406页

作者： Xin Li Quan Liu Chong Fu Mengxun Li changchun Li Xinyun Li Shuhong Zhao Zhuqing Zheng Key Lab of Agricultural Animal Genetics Breeding and Reproduction of Ministry of Education and Key Laboratory of Swine Genetics and Breeding of Ministry of AgricultureCollege of Animal Science and TechnologyHuazhong Agricultural UniversityWuhanHubei 430070China institute of Agricultural Biotechnology Jingchu University of TechnologyJingmenHubei 448000China The Cooperative Innovation Center for Sustainable Pig Production WuhanHubei 430070China Hubei Hongshan Laboratory WuhanHubei 430070China

Structural variants(SVs),such as deletions(DELs)and insertions(INSs),contribute substantially to pig genetic diversity and phenotypic *** a library of SVs discovered from long-read primary assemblies and short-read sequenced genomes,we map pig genomic SVs with a graph-based method for re-genotyping SVs in 402.*** results demonstrate that those SVs harboring specific trait-associated genes may greatly shape pig domestication and local *** characterization of SVs reveals that some population-stratified SVs may alter the transcription of genes by affecting regulatory *** identify that the genotypes of two DELs(2.6-bp DEL,chr7:52.172.101e52.172.397;2.8-bp DEL,chr18:2.,840,143 e2.,840,42.)located in muscle-specific enhancers are associated with the expression of target genes related to meat quality(FSD2.and muscle fiber hypertrophy(LMOD2.and WASL)in *** results highlight the role of SVs in domestic porcine evolution,and the identified candidate functional genes and SVs are valuable resources for future genomic research and breeding programs in pigs.

关键词： Pigs Structural variation Selection signatures Regulatory elements

Study on green power supply modes for heavy load in Remote Areas

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Global Energy Interconnection 2024年第4期7卷 475-485页

作者： Yu Li Yixi Cuomu Yiming Gao Guoqin Lv Weiwei Lin Sirui Li changchun Zhou State Grid Xizang Electric Power Co. Ltd.Lhasa 850010Tibet Autonomous RegionP.R.China Global Energy Interconnection Development and Cooperation Organization Beijing 100031P.R.China State Grid Fujian Power Economic Research institute Fuzhou 350012P.R.China Eindhoven University of Technology Eindhoven.5621 AENetherlands

In this study,the present situation and characteristics of power supply in remote areas are *** studying the cases of power supply projects in remote areas,the experience is analyzed and described,and the applicability of related technologies,such as grid-forming storage and power load management,is studied,including grid-connection technologies,such as grid-forming converters and power load *** this basis,three power-supply modes were *** application scenarios and advantages of the three modes were compared and *** on the local development situation,the temporal sequences of the three schemes are described,and a case study was *** study of the heavy-load power supply mode in remote areas contributes to solving the problem of heavy-load green power consumption in remote areas and promoting the further development of renewable energy.

关键词： Remote area Renewable energy Grid-forming storage Power load management Power supply mode

Portable fluorescence instrument for detecting membrane integrity in membrane bioreactor (MBR)

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Frontiers of Environmental Science & Engineering 2024年第2期18卷 121-131页

作者： Yang Yu changchun Xin Yuxiang Liu Fei Gao Lei Zhang Hui Jia Jie Wang State Key Laboratory of Separation Membranes and Membrane Processes Tiangong UniversityTianjin 300387China School of Environmental Science and Engineering Tiangong UniversityTianjin 300387China School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China Shenyang academy of Environmental sciences Shenyang 110167China Cangzhou institute of Tiangong University Tiangong UniversityCangzhou 061000China

This study proposed the design, fabrication, and assembly of membrane integrity detection instruments in membrane bioreactors (MBR) based on fluorescence spectroscopy. Based on the PARAFAC model, we found that the peak at 2.0/335 nm strengthened after membrane breakage. The peak at 340/430 nm reflected the sludge concentration in the MBR and reduced the influence of internal filtration effects on detection. Therefore, we determined that the dual-LED light source excitation detection system can detect tryptophan-like substances at 2.0 nm (T-peak) and humic acid at 340 nm (C-peak). T-peak was identified as the core index indicating membrane integrity. Moreover, the C-peak is the reference indicator factor for a sensitive response to changes in the sludge concentration. The portable fluorescence instrument exhibited high sensitivity and good feedback accuracy compared to particle counting and turbidity detection, where the log reduction value was greater than 3.5. This overcomes the disadvantage of false alarms in particle counters and is not affected by the position of the pump system. This portable instrument provides a flexible and highly sensitive method for the assessment of industrial membrane integrity.

关键词： Membrane integrity Fluorescence spectrum Portable instrument Membrane bioreactor

A STUDY ON DESERTIFICATION OF WEST JILIN PROVINCE BASED ON REMOTE SENSING AND GIS TECHNIQUES

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chinese Geographical Science 2002年第1期12卷 73-79页

作者： ZHU Jin hua, LI Jin song(changchun institute of {2., the chinese academy of sciences, changchun 13.02., P.R. china) changchun institute of {2. the Chinese Academy of Sciences Changchun P. R. China

'West Jilin Province' in this paper means Zhenlai, Baicheng, Taonan, Da'an,Tongyu, Fuyu, Songyuan, Qian'an, Changling, also includes Gongzhuling, Shuangliao, Lishu, Siping andNong' an which have been suffered from desertification. In west Jilin Province there are three sandzones passing through, they are Xiang (Xianghai) -Wu (Ulan Tug) sand zone, Hai-Feng sand zone, andTao'er River right bank sand zone. The desertification area of west Jilin Province is 819 100 ha,making up 12. 5% of the total land area. Among desertification types, in Jilin Province lightdesertification is the major, then is medium decertification, hevey desertification is the *** to the comparison of the interpretation results of the Landsat images of the 1980s and the1990s by remote sensing and GIS techniques, it can be seen that the desertification area in westJilin Province basically didn't change on the whole, only increased 6130 ha, making up 0. 8% of thedesertification area, change scale is less than 1%. Evidently, desertification is controlled mostly,but some areas are continuing deterioration. The desertification process of china can be dividedinto three types according to origin nature, they are sandy steppe desertification, fixed sandarea(sand land) activation and dunes transfer invasion. Reasons of desertification of West JilinProvince are analyzed, they include natural factors (such as material source factors, chimatefactors) and artificial factors (such as destroying grass to reclaim, steppe decreasing greatly,illegally feeling shelter forest stands, constructing reservoir to influence eco-environment etc. ).Some suggestions are put forward as follows: establishing the social project for ecologicalreconstruction of degenerated land; intensifying planning and management of land use, revertingfarmland into forestland or pasture in a planned way. The key desertification control is to dependmainly on policy and management, then control techniques.

关键词： remote sensing (RS) and GIS techniques desertification west jilin province

Landscape planning and ecology construction of wetland comprehensive protected area system in the Sanjiang Plain

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Journal of Environmental sciences 2000年第3期12卷 361-366页

作者： LIU Hong\|yu, LU Xian\|guo, LIU Zhen\|qian (changchun institute of {2., chinese academy of sciences, changchun 13.02., china) 中科院长春地理所吉林长春 1 3 0 0 2

Wetland is one of the richest biodiversity areas in the earth. The main purpose of establishing wetland protected area is to protect biodiversity, and the protection of ecosystem diversity and landscape diversity is the key to protect biodiversity. In order to protect regional ecosystem and landscape, it is a good way to establish wetland comprehensive protected area which connected wetland nature reserves by habitat corridors. The Sanjiang Plain as a study area, its landscape evaluation index system on wetland protected area was studied, and some problems on landscape planning and ecology construction were further approached in this *** showed that establishing wetland comprehensive protected area is very important to protect regional wetlands, to maintain ecological balance, and to improve the sustainable development of agriculture and industry in this region.

关键词： landscape planning ecology construction wetland protected area

FEASIBLE STUDY ON THE INTEGRATION SYSTEM FOR THE SPACE MONITORING OF MAJOR EARTHQUAKES AND VOLCANOES IN TERRESTRIAL LAND

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chinese Geographical Science 2002年第4期12卷 350-353页

作者： BO Li-qun(changchun institute of {2.,t he chinese academy of sciences,changchun 130012.P.R.china) changchun institute of {2. the Chinese Academy of Sciences Changchun P. R. China

With the rapid development of space technology,earth observation tech nology and sky observatory technolo-gy,they have played a more and more im portant part in monitoring and predi cting of earthquakes and volcanoes i n the terres-trial *** recent years,the rela ted agencies have done the experimen ts and researches on monitoring and p redicting of earthquakes and volcanoes in the forewarning period by means of many appr oaches,such as satellite thermal in frared re-mote sensing(TIRS),Global Positioning System(GPS),differential interferometric syn thesis aperture radar(D-INSAR),astronomical time-latitude residual anomaly,and Geographic Information Systems (GIS),etc.A quite large number of re-search foundation has been built in t he fundamental theories and applica tion *** experiments and re searches have shown that these technology is e fficient methods for high frequency crust *** the existed separate scientific forces and results are possibly asse mbled together to form a more complete integration monitoring system wit h the combina-tion of space,sky observation,grou nd,deep geology and macro anomaly,i t will come into a new stage of monitoring and predicting of earthquakes and volca nic eruptions.

关键词： space technology integration system earthquake and volcano

Lead content of urban soils in china

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Journal of Environmental sciences 1994年第3期6卷 355-360页

作者： Zhang Xuelin(changchun institute of {2.,chinese academy of sciences,changchun 13.02.,china) Meng Ke(Department of Environmental sciences,Qingdao Univereity,Qingdao 2.6003,china)

This paper presents the background value of Pb content in soils from Wuhan,Lanzhou,changchun andQingdao cities in china,the soils were contaminated by either of smelter,automo- bile,chemical industries,and traffic road. The degree of Pb pollution in the four cities is different,Wuhan >Qingdao > changchun>Lanzhou. The heavier pollution is where it is nearer to the pollution source. The Pb pollution in Wuhan,Qingdao and changchun is similar to that of Ber- mingham.

关键词： lead urban soil pollution

Synthesis,characterization,properties and crystal structure of heterometallic 1D coordination polymers {[CuLZn·CuLZn(H_2.)]·H_2.}_n

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Science china Chemistry 2006年第4期49卷 338-344页

作者： TAO Ruojie1, LI Fu’an1, ZANG Shuangquan1, CHENG Yanxiang2.& NIU Jingyang1 1. Chemistry and Chemical Engineering College of Henan University, Kaifeng 475001, china 2. changchun {2. of Applied Chemistry, chinese academy of sciences, changchun 13.02., china 1. Chemistry and Chemical Engineering College of Henan University Kaifeng 475001 China 2. changchun institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

Copper-zinc heterometallic 1D chain coordination polymer has been synthesized and characterized by elemental analysis, and IR spectra etc. The crystal structure was determined by single-crystal X-ray diffraction analyses. The title complex is 1D chain coordination polymer with the chemical formula {[CuLZn·CuLZn(H2.)]·H2.}n, where H4L=N-(2.hydroxybenzamido)-N’-(3-carboxy- lsalicylidene)ethylenediamine. Its structural unit is comprosed of two tetranuclear cycles formed by two dissymmetrical tetranuclear units. These units polymerized each other to form 1D chain coordi- nation polymer.

关键词： copper, zinc, heterometallic coordination polymer, crystal structure.