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Simulation and analysis of wastewater stabilization Pond system

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Journal of Environmental sciences 1994年第1期6卷 42-51页

作者： Wen Xianghua(research center for Eco-Environmental sciences. chinese academy of sciences, Beijing 100085, China)Qian Yi Gu Xiasheng(Department of Environmental Engineering,Tsinghua Univeisity. Beijing 100084, China)

in this study, an ecological model established by the authors is used to simulate the ge-neral operation characteristics of wastewater stabilization pond system. Some conclusions are useful for understanding the mech... 详细信息

关键词： ecological model simulation wastewater stabilization pond.

MAGNETOSPHERIC PHYSICS

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空间科学学报 1998年第S1期18卷 27-38页

作者： LIU Zhen-xing(center for Space Science and Applied Researeh, The chinese academy of sciences,Beijing 100080)PU Zu-yin (Department of Geophysics, Peking University)

Magnetospheric physics has been one of the most active areas in chinese space research in past two years. The major project "Energy Transport Processes in the Solar-Terrestrial system" (1993-1997) sponsored by the National Natural Science Foundation in China (NSFC) has been successfully completed. Prestudies relevant to the key scientific engineering program "Meridian Chain at One Hundred Twenty Degree East Multi-Station and Multi-Instrument Observatory system" have started. A new key project "Study of Auroral Magnetospheric and Ionospheric Physics" (1997-1999) sponsored by the NSFC has begun. The Space Active Experiment Program has been carrying on *** between chinese and international magnetospheric physicists have proceeded forward. More than 40 papers covering a variety of subjects in the magnetospheric physics were published in chinese and international academic journals. Most of these works were supported by the NSFC. This report provides a brief summary of aforementioned advances made in China in the past two years.

关键词： Magnetospheric physics Magnetopause Magnetic reconnection Substorm Magnetospheric modeling Magnetospheric waves and instabilities

Indicator system and evaluation framework for sustainable development

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Journal of Environmental sciences 1999年第4期11卷 492-497页

作者： ZHAO Jing\|zhu\+1, Johannes Baptist Opschoor\+2 (1. Department of systems Ecology, research center for Eco\|Environmental sciences, chinese academy of sciences, Beijing 100085, China 2. Economics Faculty, Free University, De Boelelaan 1105, 1081 HV Am 中科院生态环境研究中心北京 Free University Natherlands 荷兰

An indicator system of sustainable development was established and an evaluation framework for sustainable development was drawn in this study.

关键词： sustainable development indicator system evaluation framework

Test of membrane bioreactor for waste water treatment of a petrochemical complex

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Journal of Environmental sciences 1998年第3期10卷 14-20页

作者： Fan Yao bo, Wang Ju si, Jiang Zhao chunDepartment of Water Pollution Control and Water Reuse, research center for Eco Environmental sciences, chinese academy of sciences, Beijing 100085, China

Membrane bioreactor (MBR) used in water and waste water treatment is a developing technique for water pollution control and water reuse. This paper described a membrane bioreactor for treatment of waste water in a petrochemical complex. The experimental MBR was a lab scale one composed of an activated sludge bioreactor unit and an ultrafiltration membrane unit. The relationship of COD removal with MLSS and HRT in this MBR was studied. The effects of crossflow velocity, backwash interval and volume of flush liquid on the flux were discussed. The results showed that average removal of COD, oil, SS and turbidity in petrochemical waste water by the MBR was 91%, 86%, 92% and 99%, respectively. The average removal of NH 3 N and total phosphorous was 85% and 82% respectively. A coefficient of COD removal, k , was 0017—0080 L/(mg.d). The membrane flux maintained higher than 60 L/hm 2 bar for 34 days without chemical cleaning when the velocity of crossflow was 35—39 m/s and the backwash interval was 30 minutes and backwash duration at 20 seconds. The results indicated that it is feasible for MBR technology to be used in petrochemical waste water treatment. The treated water could be considered as a source of to make up water for industrial cooling system or to be reused for other purposes. 

关键词： membrane bioreactor petrochemical waste water biological process water treatment activated sludge.

Parameter Identification of LuGre Friction Model in Servo system Based on Improved Particle Swarm Optimization Algorithm

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Parameter Identification of LuGre Friction Model in Servo Sy...

Decolorization and kinetics of photo oxidizing cationic blue X-GRL by UV/H_2O_2 system

第二十六届中国控制会议

作者： Zhang Wenjing Integrate Information system research center Institute of Automation,chinese academy of sciences,Beijing 100080.P.R.China

LuGre friction model can describe dynamic characteristics of friction in servo system accurately,but because of its high nonlinearity,it is very difficult to estimate the parameters of the *** this paper,based on particle swarm optimiza- tion algorithm,a two-step off-line identification methodology of the LuGre friction parameters is presented to compensate the dynamic ***,four static parameters are identified via Stribeck ***,two dynamic parameters are esti- mated by stick-slip response *** swarm optimization is used in both steps to minimize the identification errors,which can avoid local convergence problem existing in the many linear identification *** main advantage of this method in comparison with classical ones,as the least-squares approach,is that it provides not only estimation of the parame- ters but also precision with which the estimated values is guaranteed,and at the same time it can avoid the problem of local *** last,the identification results are applied to a ship-borne gun servo *** verify the effectiveness of the proposed scheme for high-precision motion trajectory tracking.

关键词： AC Servo system LuGre Friction Model Parameter Identification Particle Swarm Optimization

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Journal of Environmental sciences 2000年第1期12卷 28-34页

作者： HU Chun, WANG Yi\|zhong (SKLEAC, research center for Eco Environmental sciences, chinese academy of sciences, Beijing 100085, China) Foundation item: National Key Natural Science Foundation of China (No. 29637010)

Azo dye cationic blue X GRL, which is non biodegradable toxic organic compound, is decolorized and subsequently mineralized by UV/H 2O 2/N 2 or UV/H 2O 2/air (O 2) system. The effects of initial solution concentration, initial solution pH, and some ions produced during the degradation on the rate of decolorization of cationic blue X GRL were investigated. The photodegradation of cationic blue X GRL approximately follows first order kinetics. The regression curve of the natural logarithm of concentration verus reaction time becomes less linear with initial concentration increasing. Oxygen and appropriate OH\+· generator can accelerate reaction rate. The effect of reaction atmosphere, initial concentration, light intensity on the optimal dosage of H 2O 2 were studied. It was found that the optimal H 2O 2 dosage was determined by UV light intensity. These intermediates of cationic blue X GRL decolorization are biodegradable.

关键词： decolorization cationic blue X GRL kinetics photooxidation ultraviolet hydrogen peroxide CLC number: X703 Document code: A

An Effective Method to Determine the Moving Direction of the Objects for Video Surveillance

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An Effective Method to Determine the Moving Direction of the...

Display of aggregation-prone ligand binding domain of human PPAR gamma on surface of bacteriophage lambda

2012电子信息与电气工程国际学术会议(EIEE2012)

作者： Guoqing Li center for Space Science and Applied research, chinese academy of sciences CSSAR Graduate University of chinese academy of sciences, GUCAS Bo Liu center for Space Science and Applied research, chinese academy of sciences CSSAR Beijing, China Xiujie Jiang center for Space Science and Applied research, chinese academy of sciences CSSAR Beijing, China

Motion detection plays an important role in video surveillance system. The sign distribution features will be covered up by the use of the absolute differential image. In this article, a method to determine the motion direction of moving objects by using the sign distribution features in the differential image of two consecutive frames is proposed. The proposed method is much lower in computational complexity than the method for calculating the motion vectors and better than the method based on more than three consecutive frames for real-time video surveillance system. Experimental results show that algorithm of the method is suitable for computer processing.

关键词： motion direction video surveillance differential image signs distribution

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Acta Pharmacologica Sinica 2006年第1期27卷 91-99页

作者： Bo KONG~(2,4) Wei-jun MA~(2,3,5)2 Institute of Health sciences.Shanghai Institutes for Biological sciences,chinese academy of sciences and Medical School of Shanghai Jiao Tong University.Shanghai 200025.China 3 Shaughai research center of Biotechnology,Shanghai Institutes for Biological sciences,Chiese academy og sciences,Shanghai 200233.China 4 Graduate School of the chinese academy of sciences InstituteofHealthsciences ShanghaiInstitutesforBiologicalSciencesChineseAcademyofSciencesandMedicalSchoolofShanghaiJiaoTongUniversityShanghai200025China

Aim:To display the aggregation-prone ligand binding domain (LBD) of the hu-man peroxisome proliferator-activated receptor gamma (PPARγ) on the surface ofbacteriophages to establish an easy screening assay for the identification of PPARγ***:Plasmids were constructed for the expression of the PPARγLBD as a fusion to the N-terminus of the g3p protein of filamentous phage or theC-terminus of the capsid protein D (pD) of phage *** fusion proteinswere expressed in E coli and solubility characteristics were *** against the LBD as well as the pD protein were prepared for Westernblot analysis and phage capture ***:The pD-LBD fusion protein waspartially soluble,whereas the LBD-g3p fusion protein was detected only in theinsoluble *** pD-LBD fusion protein was efficiently incorporated inphage ***,the LBD was shown to be displayed on the surfaceof bacteriophage *** average,the pD-LBD fusion protein accounted for28% of the total pD protein in the lambda head ***:The hydro-phobic PPARγ LBD was expressed as a soluble form of fusion protein in E coli anddisplayed on the surface of bacteriophage lambda when it was fused to the lambdapD *** lambda pD fusion system could be used for improving the solu-bility of proteins that tend to form inclusion bodies when expressed in E *** phage particles displaying the LBD of PPARy may be of great value for theidentification of novel PPARγ ligands.

关键词： protein expression lambda phage surface display nuclear receptor peroxisome proliferator-activated receptors ligand binding domain

An Adaptive Sliding Mode Compensation for Friction and Force Ripple in PMSM AC Servo system

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An Adaptive Sliding Mode Compensation for Friction and Force...