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Structure parameters and function of hydraulic elastic bulging roller

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中国有色金属学会会刊：英文版 2001年第2期11卷 188-191页

作者：李纬民刘助柏赵长才刘国晖 li wei-min School of Mechanical Engineering Yanshan University

The fundamental principle and method of the determining of structure parameters for the hydraulic elastic bulging roller were discussed. The relationship among crown of roller, hydraulic pressure and thickness of roller sleeve was studied. Aluminum was chosen as experimental material to accomplish the dynamic load experiment. The hydraulic elastic bulging roller exerts good effect on shape control and therefore has a broad application prospect in engineering. [

关键词： hydraulic bulging roller shape control structure parameters

Numerical simulation of a combined oxidation ditch flow using 3D k-ε turbulence model

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Journal of Environmental Sciences 2005年第5期17卷 808-812页

作者： LUO lin li wei-min DENG Yong-sen WANG Tao State Key Laboratory of Hydraulics Sichuan University Chengdu 610065 China College of Municipal Construction and Environmental Engineering Chongqing University Chongqing 400045 China

The standard three dimensional（3D） k-ε turbulence model was applied to simulate the flow field of a small scale combined oxidation ditch. The moving mesh approach was used to model the rotor of the ditch. Comparison of the computed and the measured data is acceptable. A vertical reverse flow zone in the ditch was found, and it played a very important role in the ditch flow behavior. The flow pattern in the ditch is discussed in detail, and approaches are suggested to improve the hydrodynamic performance in the ditch.

关键词： oxidation ditch 3D simulation turbulence flow

Mechanical Analysis of Dead Load Crown and Structure Parameter of Hydraulic Elastic Bulging Roll

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Journal of Iron and Steel Research International 2003年第3期10卷 28-31页

作者： ZHAO Chang-cai li wei-min liU Zhu-bai Yanshan University

The dead load crown of hydraulic elastic bulging roll was discussed using the theory of elastically supported beam,and the dead load experiment was carried out. The theoretical calculation is consistent with the experimental result. The structure parameters for the thickness of roll sleeve,the length of the oil groove and the crown of roll were discussed. The fundamental principle of determining the parameters was put forward. The theoretical basis of the application of the hydraulic elastic bulging roll was established.

关键词： hydraulic elastic bulging roll bulging crown dead load

Analysis on the time-domain characteristics of botnets control traffic

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The Journal of China Universities of Posts and Telecommunications 2011年第2期18卷 106-113页

作者： li wei-min MIAO Chen liU Fang LEI Zhen-ming School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Botnets are networks composed with malware-infect ed *** are designed and organized to be controlled by an *** victims are infected through their inappropriate network behaviors in most cases,the Internet protocol（IP） addresses of infected bots are ***,a bot can get an IP address through dynamic host configuration protocol（DHCP）,so they need to get in touch with the controller initiatively and they should attempt continuously because a controller can＇t be always *** whole process is carried out under the command and control（C＆C） *** goal is to characterize the network traffic under the C＆C channel on the time *** analysis draws upon massive data obtained from honeynet and a large Internet service provider（ISP） *** extract and summarize fingerprints of the bots collected in our ***,with the fingerprints,we use deep packet inspection（DPI） Technology to search active bots and controllers in the ***,we gather and analyze flow records reported from network traffic monitoring *** this paper,we propose a flow record interval analysis on the time domain characteristics of botnets control traffic,and we propose the algorithm to identify the communications in the C＆C channel based on our *** that,we evaluate our approach with a 3.4 GB flow record trace and the result is *** addition,we believe that our work is also useful information in the design of botnet detection schemes with the deep flow inspection（DFI） technology.

关键词： botnet detection netflow record time domain analysis deep flow inspection

Fuzzy Evaluation of Coal Seam Geological Condition of Fully-Mechanized Face in Ten-Million-Ton mine

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Journal of China University of mining and Technology 2005年第3期15卷 208-212页

作者： li wei-min DONG Guo-wei WANG Hong-sheng FENG Mei-mei School of mineral and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Jisan mine of Yanzhou mining Group Jining Shandong 272100 China

Based on coal seam geological condition and mining technological characteristic in Jisan mine, coal seamgeological condition is quantitative evaluated by using fuzzy evaluation with the view of coal mining and coalfaceproduction. The structure and index system of evaluation factor, the membership functions and weights of evaluationfactor, evaluation model and reliability in the coal seam geological conditions are expounded in detail. Eighty-twocoalfaces which will be exploited is classified. All of these have provided a theoretical foundation for the selection ofcoal mining technology and for sustainable development of the coal mine.

关键词： fuzzy evaluation membership function ten-million-ton mine

Ion-Induced Beam Instability in an Electron Storage Ring

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Chinese Physics Letters 2000年第12期17卷 877-878页

作者： li Yong-Jun JIN Yu-ming li wei-min liU Zu-Ping National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029

In a small electron storage ring,such as the Hefei light Source(HLS)ring,the newly generated ions,which can not escape from the beam potential and then are trapped from turn to turn,will lead to the beam *** ions created by the leading bunches can perturb the trailing bunches and also themselves during their subsequent passage,which will make the amplitude of beam oscillation be damped and anti-damped periodically.A computer simulation based on the strong-weak model shows a good agreement with our analytical model using the linear theory.

关键词： theory beam Electron

Development of a first-order kinetics-based model for the adsorption of nickel onto peat

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mining Science and Technology 2009年第2期19卷 230-234页

作者： liU Zhi-rong CHEN Xiao-song ZHOU li-min wei Peng Department of Applied Chemistry East China University of Technology Fuzhou Jiangxi 344000 China

The use of peat for the removal of nickel from aqueous solutions has been investigated at various pH values by means of static conditions. The present research shows that the ability of Ni to bind to peat increases as the pH value increases. The solutions reach adsorption equilibrium rapidly. A reasonable kinetic model, first-order in nickel concentration, has been developed and fitted to the adsorption of nickel （Ⅱ） onto peat. The first-order model provides a good correlation to the experimental data. The characteristic parameters of the Langmuir isotherm were determined at various temperatures. The relationship between kinetics and equilibrium isotherms was established through the forward- and backward-rate-constants, k~ and k2, and the equilibrium constant, K.

关键词： peat nickel adsorption first-order rate model pH isotherm

Tenascin-x facilitates myocardial fibrosis and cardiac remodeling through transforming growth factor-β1 and peroxisome proliferator-activated receptor γ in alcoholic cardiomyopathy

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Chinese Medical Journal 2011年第3期000卷 390-395页

作者： JING ling ZHOU li-jun ZHANG Feng-min li wei-min SANG Ying Department of Cardiology First Clinical College of Harbin Medical University Harbin Heilongjiang 150001 China Department of Pathogen Biology Laboratory Harbin Medical UniversityHarbinHeilongjiang 15001Chin

Background Tenascin-x, an extracellular matrix glycoprotein exclusively expressed in fibroblasts, can mediate fibrosis in the presence of collagen. Therefore, we have investigated its potential role in facilitating myocardial fibrosis and cardiac remodeling via the transforming growth factor-lβ1 and peroxisome proliferator-activated receptor γ（TGFβ1-PPARγ） pathway in alcoholic cardiomyopathy （ACM）.Methods Experimental animals were divided into control （group A） and tenascin-x knock-out groups （group B）receiving alcohol. Six months post treatment, cardiac ejections fraction （EF）, fractional shortening （FS）, left ventricle end-diastole internal diameter （LVEDd） and collagen column fraction （CVF） were observed. Tenascin-x, smad-3, TGFβ1,smad-7 and PPARγ protein expression levels were detected by Western *** Six months post treatment, EF and FS values were higher in group B than in group A （P 〈0.05 and P 〈0.01,respectively）, while LVEDd and CVF were lower in group B （P 〈0.05 and P 〈0.01, respectively）. Tenascin-x, smad-3 and TGFβ1 protein expression levels were higher in group A, while smad-7 and PPARY levels were lower than in group B （P〈0.01）, as measured by immunohistochemistry and Western blotting. Tenascin-x protein expression was negatively correlated with EF, FS, smad-7 and PPARγ, and positively correlated with LVEDd, CVF, smad-3, and TGFβ1 （P 〈0.001）.Conclusion Tenascin-x is an initiator of myocardial fibrosis and ACM development via upregulation of TGFβ1 and downregulation of PPARγ.

关键词： tenascin-x myocardial fibrosis cardiac remodeling TGFβ1-PPARy, alcoholic cardiomyopathy

The Intrusion Detection Based on Genetic Algorithms

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Journal of Shanghai University(English Edition) 2001年第z1期5卷 66-69页

作者： li wei-min