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wuhan university Journal of Natural Sciences 2007年第4期12卷 669-676页

作者： ZHANG Ji1,2,YU Sujun3.. Key Laboratory of Mountain Hazards and Surface Process,Chinese Academy of Sciences/Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,Sichuan,china 2. Graduate university of the Chinese Academy of Sciences,Beijing 100049,china 3. School of Environmental Science and Engineering,Southwest Jiaotong university,Chengdu 610041,Sichuan,china Key Laboratory of Mountain Hazards and Surface Process Chinese Academy of Sciences/Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 Sichuan China

Blind numbers of evaluation indices about groundwater resources carrying capacity are defined from the concomitancy of randomness, fuzziness, grey property and unascertainment of groundwater system. Based on fuzzy theory, a comprehensive evaluation model on groundwater resources carrying capacity is constructed with blind information. Then a risk assessment model of surcharge about groundwater resources carrying capacity is established on blind reliability theory. The probable value ＂＊＂ matrix of fuzzy membership degree about carrying capacity corresponding to each judgment level can be obtained with the aid of blind algorithm as well as the subjective reliability ＂×＂ matrix. And then a graph of ＂groundwater carrying capacity v.s. accumulative reliability＂ can be gained Based on the graph, fuzzy membership degree of groundwater resources carrying capacity to each judgment level under different risk probability can be got. Thus, a comparatively reasonable judgment to groundwater resources carrying capacity might be obtained, with comprehensive analysis to the state of society, economy technology and ecology.

关键词： blind number theory groundwater resources carrying capacity evaluation risk analysis

LOW TEMPERATURE ALUMINUM FLOATING ELECTROLYSIS IN HEAVY ELECTROLYTE Na_3.lF_6-AlF_3.BaC1_2-NaCl BATH SYSTEM

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Acta Metallurgica Sinica(English Letters) 2000年第4期13卷 949-954页

作者： H.M. Lu and K.M. Fang Metallurgy School, university of Science and technology Beijing, Beijing 100083. china Z.X. Qiu Department of Nonferrous Metallurgy, Northeastern university, Shenyang 110006, china Beijing Univ of Science and Technology Beijing China

Multiple regression equations of liquidus temperature, electrical conductivity and bath density of the Na_3.lF_6-AlF_3.BaC1_2-NaCl system were obtained from experiments by using orthogonal regression method. The experiments were carried out in 100A cell with low melting point electrolyte, the influences of cathodic current density, electrolytic temperature, density differences of bath and liquid aluminum on current efficiency (CE) were studied; when the electrolyte cryolite ratio was 2.5, w(BaC1_2) and w(NaCl) were 48% and 10%, respectively, CE reached 90% and specific energy consumption was 10.97k Wb/kg/kg. Because of the fact that aluminum metal obtained floated on the surface of molten electrolyte, this electrolysis method was then defined as low temperature aluminum floating electrolysis. The results showed that the new low temperature aluminum electrolysis process in the Na_3.lF_6-AlF_3.BaC1_2-NaCl bath system was practical and promising.

关键词： low temperature aluminum floating electrolysis Na_3.lF_6- AlF_3.aC1_2-NaCl bath system current efficiency physico-chemical property

A Robot Soccer Obstacle Avoidance Strategy with Local Region

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A Robot Soccer Obstacle Avoidance Strategy with Local Region

MODEL OF CLEAVAGE CRACK PROPAGATION ACROSS BOUNDARY

2010 ETP/IITA Conference on Telecommunication and Information(TEIN 2010)

作者： WENTAO LIU Department of Computer and Information Engineering wuhan Polytechnic university wuhan Hubei Province 43.023.{3.

The collision occurs when robot pass and shoot a ball and they are located in the same horizontal area and the direction is opposite. It may lead to own goal and other results which are conducive to the whole strategy. In this paper, a mathematical model about robot soccer obstacle avoidance is provided and some conditions of collision are discussed and the geometric analysis is presented. On this basis, an algorithm for robot soccer obstacle avoidance based on local region is provided and it is designed by the local region planning around ball and the local region can changed with relative position between robot and ball using four parameters. An experiment is made and it shows that the algorithm can get shorter path and smooth transition between local and whole strategy.

关键词： robot soccer obstacle avoidance local region

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Acta Metallurgica Sinica(English Letters) 1990年第4期3卷 282-286页

作者： HUANG Zheng Institute of physics,Academia Sinica,Beijing,chinaYAO Mei Harbin Institute of technology,Harbin,china Correspondent:HUANG Zheng Post-doctorial Assistant,Institute of physics,Academia Sinica,Beijing 100080,china

In the light of analysis of the features of cleavage fractographs of low carbon steel,the stress criterion for cleavage crack propagation across ferrite grain boundary was established on the supposition that resistance to the propagation results from an arbitrary mutual orientation of the cleavage plans in the neighbouring *** the basis of concept of statistical distribu- tion of cleavage plane in space,the probabilistic characteristic of cleavage process was ex- pounded,and the fracture stress of the cracked specimen over temperature range in which fracture is initiated by cleavage mechanism was calculated by means of finite element analysis program and the calculated result was found to be in agreement with that measured.

关键词： cleavage fracture mechanism finite element analysis criterion

Numerical Simulation of Air-cooling Tower

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Journal of Thermal Science 2003年第3期12卷 264-269页

作者： Lijuan Hao Huanzhi Li Zhaohu Sun Lige TongThermal Energy Department, Beijing university of Science and technology, Beijing 100083. china Thermal Energy Department Beijing University of Science and Technology Beijing China

A mathematic model for packed air-cooling tower thermodynamic calculation is set up in this paper on the basis of fundamental heat and mass transfer equations. Based on the Double Film theory, direct equation-solving method is used to simulate air-cooling tower, and variation of parameters is taken to analyze the data and results of the program.

关键词： packing air-cooling tower computer simulation mathematic model

An improved network layer protocol based on mobile IPv6

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Journal of Central South university 2001年第4期8卷 263-267页

作者： WANG Jian xin 1,HUANG Guo sheng 2,CHEN Song qiao 1,CHEN Jian er 1 (1.college of Information Science and Engineering, Central South university, Changsha 410083. china 2.Department of {3. and Electronic Engineering, Jishou university, Jisho college of Information Science and Engineering Central South University Changsha China Department of physics and Electronic Engineering Jishou University Jishou China

The mobile IPv6 proposed by the IETF aims at providing mobility support on the next generation Internet. First, the authors described the basic principle of mobile IPv6 in brief and analyzed the advantages and disadvantages of it, presented a new idea of allocating a specific address space for mobile node (MN) and developed a new extension header and two ICMP message types for mobile IPv6. Lastly the authors proposed an optimization strategy for mobile IPv6 based on these extensions of protocol, which has the following advantages: 1) It is more convenient to manage the MNs because MN can be judged from its IP address; 2) When the correspondent node (CN) is not actively communicating with a MN, the MN and its home agent (HA) need not send Binding Update to the CN, and the CN need not send Binding Request to the MN. Only when the CN really wants to send a packet to the MN, will the CN voluntarily send a MN Discovery Request message to acquire the MN′s care of address. In this way,the transmission of Binding Update and Binding Request is greatly reduced, consequently the network overhead is also decreased; 3. While sending packets, the CN simply uses a MN Home Address Extension Header without using IPinIP encapsulation and routing header, which can reduce the redundant information in the packet and the message delay; 4) All the packets sent by the CN can be directly routed to the MN and the triangle routing can be completely avoided. By using these protocol extensions, the overhead of the network is greatly reduced and the network quality of services (QoS) is improved.

关键词： mobile IP home agent mobile node care of address binding

3.4-oxo-isopropylidene-shikimic acid inhibits adhesion of polymorphonuclear leukocyte to TNF-α-induced endothelial cells in υitro

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Acta Pharmacologica Sinica 2004年第2期 120-124页

作者： Yi MA, Jian-ning SUN2, Qiu-ping XU, Zi-li YOU3. Ya-jian GUO Department of Pharmacology, Beijing university of Chinese Traditional Medicine, Beijing 100102 3.chool of Life Science and technology, university of Electronic Science and technology of china, Chengdu 610054, china

AIM: To examine the effect of 3.4-oxo-isopropylidene-shikimic acid (ISA) on human polymorphonuclear leuko- cyte (PMN) adhesion to human umbilical vein endothelial cells (HUVEC) and explore its mechanism. METHODS: Adhesion of PMN to HUVEC was measured by rose bengal staining assay. Cell-ELISA and RT-PCR methods were used to examine the expression of adhesion molecules ICAM-1. Cell viability was detected with MTT assay. RESULTS: ISA (1-100 μmol/L) effectively reduced PMN adhesion to TNF-α-induced HUVEC with the inhibitory rate from 17.2 % to 53.5 %, and exerted no effect on PMN adhesion to normal HUVEC. Adhesion molecule ICAM-1 surface protein and mRNA expression induced by TNF-α (400 kU/L) were significantly inhibited by ISA. In addition, the cell viability of HUVEC was unchanged 48 h after treatment with ISA. CONCLUSION: ISA inhibited TNF-α-stimulated PMN-HUVEC adhesion and expression of ICAM-1.

关键词： oxo-isopropylidene-shikimic acid adhesions vascular endothelium neutrophils intercellular adhesion molecule-1

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基于财税政策的经济增长质量实证研究

武汉理工大学学报 2010年第7期32卷 187-192页

作者：赵祖新华中科技大学管理学院武汉430074

改革开放后,伴随着我国经济的快速增长,经济增长质量高低的讨论日益增多。调控宏观经济、引导产业发展的重要手段是财税政策;我国改革开放后以每年平均8%的速度增长,在经济增长数量提高的同时,经济增长质量的提高使我国能够实现可持续发... 详细信息

改革开放后,伴随着我国经济的快速增长,经济增长质量高低的讨论日益增多。调控宏观经济、引导产业发展的重要手段是财税政策;我国改革开放后以每年平均8%的速度增长,在经济增长数量提高的同时,经济增长质量的提高使我国能够实现可持续发展,着重探讨了我国财税政策与经济增长质量的关系,并以TFP为经济增长质量的代理变量,选取财政教育支出、财政科技投入来反映财政政策的变化来研究他们与经济增长质量的关系,并给出了完善的政策建议。

关键词：经济增长质量财税政策产业优化

A Novel MPR Approach Based on Inverse-Traversing of Multi-Labeled Tree

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A Novel MPR Approach Based on Inverse-Traversing of Multi-La...