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Quality Evaluation and Its Application to Surface Water Ecosystem Based on Maximum Flux Principle

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Transactions of Tianjin university 2010年第5期16卷 336-341页

作者：刘年磊毛国柱赵林 school of environmental science and {3. Tianjin University

Based on the maximum flux principle(MFP),a water quality evaluation model for surface water ecosystem is presented by using self-organization map(SOM) neural network simulation algorithm from the aspect of systematic structural *** evaluation model is applied to the case of surface water ecosystem in Xindu District of chengdu City in *** values reflecting the water quality of five cross-sections of the system at different developing stages are obtained,with stable values of 1.43.,2.952,1.86...

关键词： evaluation model maximum flux principle surface water ecosystem self-organization map

Calculation of Other-Cell-Interference Factor for Multimedia CDMA Networks with Imperfect Power Control

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Calculation of Other-Cell-Interference Factor for Multimedia...

第一届中国高校通信类院系学术研讨会

作者： Hui Zhang Xuming Fang Dandan Zhang school of Information science and Technology,southwest jiaotong university,{3.,sichuan 61003.,china.

＜正＞Generally,for the complexity and difficulty of calculation,the interference from other-cell is simplified to be a certain proportion of intra-cell *** proportion is called other-cell-interference factor （f）,which is considered as a constant *** in practice,especially in multimedia CDMA networks with imperfect power control,this factor is not a constant for the channel fading,user’s mobility and traffic characteristic of variable bit *** analysis and simulation results show that the interference factor is approximated as a lognormal random variable,and it is heavily affected by the traffic load and the proportion of VBR traffic in the system.

关键词： Imperfect Power Control Interference Factor Logarithm Normal Distribution

A New Soil Infiltration Technology for Decentralized Sewage Treatment:Two-Stage Anaerobic Tank and Soil Trench System

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Pedosphere 2008年第3期18卷 401-408页

作者： YE Chun HU Zhan-Bo KONG Hai-Nan WANG Xin-Ze HE Sheng-Bing school of environmental science and {3. Shanghai Jiaotong University Shanghai 200230 （China） school of Light Industry and Food engineering Guangxi University Nanning 530004 （China） Research Center of Lake Ecological Environment Chinese Research Academy of Environmental Sciences Beijing 100012（China）

The low removal efficiency of total nitrogen （TN） is one of the main disadvantages of traditional single stage subsurface infiltration system, which combines an anaerobic tank and a soil filter field. In this study, a full-scale, two-stage anaerobic tank and soil trench system was designed and operated to evaluate the feasibility and performances in treating sewage from a school campus for over a one-year monitoring period. The raw sewage was prepared and fed into the first anaerobic tank and second tank by 60% and 40%, respectively. This novel process could decrease chemical oxygen demand with the dichromate method by 89%-96%, suspended solids by 91%-97%, and total phosphorus by 91%-97%. The denitrification was satisfactory in the second stage soil trench, so the removals of TN as well as ammonia nitrogen （NH4^＋-N） reached 68%-75% and 96% 99%, respectively. It appeared that the removal efficiency of TN in this two-stage anaerobic tank and soil trench system was more effective than that in the single stage soil infiltration system. The effluent met the discharge standard for the sewage treatment plant （GB18918-2002） of china.

关键词： decentralized treatment nitrogen removal soil trench system subsurface infiltration

Quantitative Analysis of Greenhouse Gas from Organic Refuse in Landfill

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Quantitative Analysis of Greenhouse Gas from Organic Refuse ...

The Second International ISCRAM Workshop on Information Systems for Crisis Response and Management

作者： Jun Yang Tao Huang 1.Institute of environmental science and engineering,{3., chengdu 61003.,china 2.1nstitute of environmental and municipal engineering,Lanzhou jiaotong university, Lanzhou 73.070,china

＜正＞Landfill site is one of the most important sources of greenhouse gas *** gas emitted from the landfill sites are important component of the total greenhouse gas emissions in the *** it is primarily important to predict the production of methane and carbon dioxide in order to control greenhouse gases emitted from *** on the mechanism of anaerobic degradation process of organic refuse,a detailed calculating method was proposed to work out the quantity of greenhouse gas emitted from *** result shows that, 0.3.84,0.1192,0.2182 and 0.2297 kilograms of methane,and 0.3.95,0.2264,0.5191 and 0.543. kilograms of carbon dioxide are generated from the waste meat,plant,paper and wood（per kilogram refuse by wet weight） respectively during the anaerobic degradation process in *** conclusion accords closely with the experimental result from available *** on the conclusion,quantity of greenhouse emission from landfill can be predicted if organic component of refuse is measured.

关键词： Landfill Greenhouse Gas Generation Quantitative Analysis Control

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国民性理论的形象学反思——从明恩溥到鲁迅

四川大学学报（哲学社会科学版） 2003年第3期 82-88页

作者：苏志宏西南交通大学人文学院四川成都610041

从形象学角度分析中国现代文化史上的国民性理论中固有的矛盾性,描述自明恩溥至鲁迅的国民性理论发展过程中的形象学内涵的演变,并以此对"国民性神话论"提出质疑。

关键词：国民性明恩溥鲁迅形象学

Construction and evaluation of reference standards for detection and quantification of Klebsiella pneumoniae using real-time PCR

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Journal of Pharmaceutical Analysis 2010年第3期22卷 183-187页

作者： Fei-Long Sun1,2,Min Jin3.Zhi-Gang Qiu3.Zhi-Qiang Shen3.Xin-Wei Wang3.Jun-Wen Li3..school of Life science and Technology,Xi’an jiaotong {3.,Xi’an 710049 2.school of environmental and Chemical engineering,Xi’an Polytechnic {3.,Xi’an 710048 3.Institute of Environment and Health,Tianjin 3.0050,china school of Life science and Technology Xi'an Jiaotong University Xi'an 710049 China school of environmental and Chemical engineering Xi'an Polytechnic University Xi'an 710048 China Institute of Environment and Health Tianjin 300050 China

Objective To construct reference standards for detection and quantification of Klebsiella pneumoniae(***)with SYBR Green I-based real-time PCR *** Primers were designed based on the published sequence of the phoE gene of *** standard was prepared by cell culture,PCR and T-A clone methods,and was identified by colony PCR and DNA *** The standard curve showed a very good linear negative regression between threshold cycle(Ct)and Log starting quantity of copy *** detection range was from 5.2 to 5.2×106 copies per reaction,and the detection limit was 6 copies per *** coefficients of variance(CVs)of three parallel experiments were in the range of 0.05%-0.91%.Conclusion The reference standards have high stability and *** can be used in the quantitative detection of ***.

关键词： cloning vector Klebsiella pneumoniae real-time PCR standard

Theoretical analysis of the conversion from electrical into thermal energy in piezoelectric-conductive damping composites

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Journal of Modern Transportation 2011年第2期19卷 143-146页

作者： Wei WEI Cheng HUANG Zuowan ZHOU Key Laboratory of Advanced Technologies of Materials （Ministry of Education） School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 China

Based on the principles of electrical conduction and transformation, a model was put forward for the electrical conversion of piezoelectric damping composites, and a related formula was derived. The results show that the best effect of conversion can be achieved by reducing the imaginary part of the impedance and matching the frequency. The optimal damping effect at a certain frequency requires resistance of conductive phase （R） satisfying the condition of R=I/（ωC）, but this condition may cause the damping effect at other frequencies to deviate away from the optimum condition. It is suggested that in order to make the damping effect more efficient and objective, frequency matching should be considered during the design of piezoelectric damping composites.

关键词： electrical analysis piezoelectric damping composites.

Modulation characteristic of vertical-cavity surface-emitting lasers subject to external optical feedback

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Modulation characteristic of vertical-cavity surface-emittin...

第十届全国青年通信学术会议

作者： Xiaofeng Li, Wei Pan, Dong Ma, Bin Luo (school of Information science & Technology, southwest jiaotong university, {3., sichuan 61003., china)

＜正＞The small-signal modulation characteristics of vertical-cavity surface-emitting lasers （VCSELs） subject to both weak and strong external optical feedback are studied numerically. For weak feedback case, the oscillation amplitude of the laser output, the modulation bandwidth and the frequency chirp are affected simultaneously by the light reflected by the external mirror. The variation directions of them are determined by the relative phase of the reflected optical field and the in-cavity one, which is ultimately decided by the external cavity length. For strong feedback case, however, the laser behaviors might be influenced dramatically. When the optical feedback dominates the modulation effects, rich nonlinear dynamics, such as the periodic, multi-periodic, quasi-periodic, and chaotic oscillations, are excited. When both effects are equivalent, however, the nonlinear dynamics induced by the optical feedback as well as the periodic envelope introduced by the current modulation is simultaneously found in the laser output.

关键词： VCSELs current modulation external optical feedback chaos.

Discussion on the Special Significance of Passive Control Technology for the Nuclear Reactor

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Discussion on the Special Significance of Passive Control Te...

2012 International Conference on Power and Energy Systems(ICPES 2012)

作者： Xiangwei Zeng 1,2,a , Xiaoping Qiu 1,3.b,* , Kun Chen 1,4,c and Xiaoge Zeng 1,5,d 1 sichuan Passive Control Technology R&D Center, chengdu(610041), sichuan, P.R.china 2 sichuan science and Technology Association, chengdu(610041), sichuan , P.R.china 3.school of Transportation and Logistics, southwest jiaotong university, chengdu(61003.), sichuan, P.R.china 4 school of Manufacturing science and engineering, sichuan university, chengdu(610065), sichuan, P.R.china 5 sichuan Fluid Technology Development Co. Ltd, chengdu(610041), sichuan , P.R.china

On the background of the leakage of Fukushima nuclear power plant resulted from 3.11 earthquakes in Japan, this paper discussed the failure causes of the reactor core cooling system, the pressure releasing system and the residual heat removal system in Three Mile Island, Chernobyl, Fukushima nuclear power plant in fatal accidents. Then the passive emergency water cooling system for reactor fatal accident is put forward for the existing and future unclear power plant with the characteristics of infinite source, independent, powerful, submerge, through flow and circulation followed by the introduction of the main devices, the circulation principle and the links to the two existing reactor of this system for better feasibility.

关键词： Nuclear reactor, Passive control, Cooling water circulation system, Fukushima.