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The Design of Technical System for Software Project Team Sharing Knowledge

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The Design of Technical System for Software Project Team Sha...

Two-dimensional thermoelasticity solution for functionally graded thick beams

第24届中国控制与决策会议

作者： Zhixin zheng 1.1. College of Computer Science, Liao Cheng University , Liao Cheng 252059

The software project team is a knowledge intensive team, team members share knowledge can improve development efficiency. The knowledge sharing activity needs support of the powerful information technology, the application of information technology can promote the realization of the knowledge sharing activity. This paper points out that the knowledge sharing technology is not one technology, but one technology system, including knowledge acquisition technology, knowledge presentation technology, knowledge transfer technology, knowledge storage technology and so on. This paper also summarizes a variety of tools and methods which can be used in the knowledge sharing process, various technical tools may have functions of knowledge acquisition, presentation, or transfer at the same time. Many tools have been applied to practice obtained very good knowledge sharing effect.

关键词： Knowledge sharing Technology system Software project team

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Science China(Physics,Mechanics & Astronomy) 2006年第4期49卷 451-460页

作者： Lü Chaofeng1. CHEN Weiqiu1.& ZHONG zheng2 1. Department of Civil Engineering, Zhejiang University, Hangzhou 31.027, China 2. Key Laboratory of Solid Mechanics of Ministry of Education, School of Aerospace Engineering and Ap- plied Mechanics, Tongji University, Shanghai 200092, China Department of Civil Engineering Zhejiang University Hangzhou China Key Laboratory of Solid Mechanics of Ministry of Education School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai China

Two-dimensional thermoelasticity analysis of functionally graded thick beams is presented using the state space method coupled with the technique of differential quadrature. Material properties vary continuously and smoothly through the beam thickness, leading to variable coefficients in the state equation derived from the elasticity equations. Approximate laminate model is employed to translate the state equation into the one with constant coefficients in each layer. To avoid numerical instability, joint coupling matrices are introduced according to the continuity conditions at interfaces in the approximate model. The differential quadrature procedure is applied to discretizing the beam in the axial direction to make easy the treatment of arbitrary end conditions. A simply-supported beam with exponentially varying material properties is considered to validate the present method. Numerical examples are performed to investigate the influences of relative parameters.

关键词： state equation differential quadrature approximate laminate model joint coupling matrices thermal stresses.

Research on Risk Assessment for Security System Based on Effectiveness Evaluation Theory

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Research on Risk Assessment for Security System Based on Eff...

The Second Critical Exponent for a Fast Diffusion Equation with Potential

201. 3rd IEEE International Conference on Computer Science and Information Technology—ICCSIT 201.

作者： Yujie zheng 1.1. School of Computer GuangXi Economic Management Cadre College GuangXi Nanning 530007.

With the development of security system information degree and protection capability format, it is important to evaluate its effectiveness precisely to prevention and control of social order based on these changes. According to the operational characteristics of security system, protection format is divided into personal protection, physical protection, and electronic protection. Effectiveness evaluation theory is used to measure how the risks were in each protection capability format. Meanwhile a method is put forward to evaluate security system effectiveness, then the conclusion is clear that security system risk is not directly proportional to protection capability, but the speed raising process of "fast-slow-down-stable 0".

关键词： security system risk assessment effectiveness evaluation theory protection capability

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Journal of Mathematical Research with Applications 2012年第6期32卷 715-722页

作者： Chunxiao YANG1.2, Jin’ge YANG1. Sining zheng1. 1. School of Mathematical Science, Dalian University of Technology, Liaoning 1.6024, P. R. China 2. Department of Mathematics, Xi’an University of Architecture and Technology,Shaanxi 71.055, P. R. China School of Mathematical Science Dalian University of Technology Liaoning 116024

This paper considers a fast diffusion equation with potential ut= um V (x)um+upin Rn×(0,T), where 1.2αm+n 1. n ≥ 2, V (x) ～ω|x|2with ω≥ 0 as |x| →∞,and α is the positive root of αm(αm + n 2) ω = 0. The cr... 详细信息

This paper considers a fast diffusion equation with potential ut= um V (x)um+upin Rn×(0,T), where 1.2αm+n1. p > 1. n ≥ 2, V (x) ～ω|x|2with ω≥ 0 as |x| →∞,and α is the positive root of αm(αm + n 2) ω = 0. The critical Fujita exponent was determined as pc= m +2αm+nin a previous paper of the authors. In the present paper,we establish the second critical exponent to identify the global and non-global solutions in their co-existence parameter region p > pcvia the critical decay rates of the initial *** u0(x) ～ |x| aas |x| →∞, it is shown that the second critical exponent a =2p m,independent of the potential parameter ω, is quite different from the situation for the critical exponent pc.

关键词： the second critical exponent fast diffusion equation potential global solutions blow-up.

OSCILLATION RESULTS RELATED TO INTEGRAL AVERAGING TECHNIQUE FOR EVEN ORDER NEUTRAL DIFFERENTIAL EQUATION WITH DEVIATING ARGUMENTS

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Annals of Differential Equations 2010年第4期26卷 414-421页

作者： Lianzhong Li 1.2 , Fanwei Meng 1., Zhaowen zheng 1.(1. School of Mathematical Sciences, Qufu Normal University, Qufu 2731.5, Shandong 2. School of Math. and System Sciences, Taishan College, Tai’an 271.21. Shandong)

In this paper, we study an even order neutral differential equation with deviating arguments, and obtain new oscillation results without the assumptions which were required for related results given before. Our result... 详细信息

关键词： oscillation neutral differential equation deviating argument integral average

Palaeoclimate simulation of Little Ice Age

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Progress in Natural Science:Materials International 2004年第8期 68-76页

作者： LIU Jian 1. CHEN Xing 2, WANG Sumin 1.and zheng Yiqun 1. (1. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 21.008, China 2. Department of Atmospheric Science, Nanjing University, Nanjing 21.093, China) Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China Department of Atmospheric Science Nanjing University Nanjing 210093 China

Little Ice Age (LIA) is a typical cold climate period in global scope with a profound impact upon human society. In this study, a coupled global atmospheric circulation model including the land processes (AGCM + SSiB) is used to perform the simulation of LIA climate. Under the control of solar radiation reduction mechanism, the decrease of temperature is more obvious in summer than in winter; meanwhile, there is regional difference in the change of winter temperature. But the temperature decrease is the main characteristic of the annual mean temperature. Volcanic dust has an evident effect on the winter temperature decrease, but to a less extent than the solar radiation. The synchronous function caused by the reduction of solar radiation and the increase of optic depth of volcanic dust has a superposed strengthening effect on the temperature decrease in large regions. Promotion of the vegetation cover rate profits the increase of temperature, and vise versa. Certain decrease of solar radiation will favor the increase of summer monsoon precipitation in East Asia. The increase of optic depth of volcanic dust does not have a significant effect on the annual precipitation in most parts of Eurasian continent. The composite effect of the decrease of solar radiation and the increase of volcanic dust makes the summer monsoon precipitation in East China increase, and that in South Asia decrease. Together with vegetation change, the result shows that precipitation increases with the increase of vegetation coverage (e.g. East Asia), and when the vegetation coverage reduces (e.g. North Africa) the precipitation will decrease, too.

关键词： Little Ice Age model simulation East Asia.

Analysis of sea surface height variabilities in the Kuroshio Current region by using Geosat altimeter data

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Acta Oceanologica Sinica 1999年第2期18卷 177-189页

作者： Pan Jiayi Yuan Yeli and zheng Quan’an 1. First Institute of Oceanography, State Oceanic Administration, Qingdao 266003, China 2. Center for Remote Sensing, University of Delaware, Newark, DE1.71., USA (Received May 8, 1.98 accepted June 1., 1.98) First Institute of Oceanography State Oceanic Administration Qingdao 266003 China Center for Remote Sensing University of Delaware Newark DE 19716 United States

The Geosat altimeter ERM T2-GDRs data were used to analyze sea surface height (SSH) variabilities in the Northwest Pacific region of 1.°- 45°N, 1.0°-- 1.0°E covering all the Kuroshio Current. After processing the Geosat GDRs data, the 50 gridded SSH anomaly fields were acquired. The comparison between the SSH anomalies and tidal gauge sea levels showed that the altimeter data accorded with the tidal gauge data especially in the low frequency scale and in open sea. The mesoscale variability energy distribution obtained from the SSH anomalies was controlled by the position of the Kuroshio, bottom topography and the stationary meander of the Kuroshio. The relative transports of the Kuroshio Extension and the Kuroshio south of Japan, represented by the difference between the SSH anomalies on two sides of the current, had strong interannual and seasonal cycles, which was related to the Kuroshio large meander. When the Kuroshio meander occurred, the transport of the Kuroshio east of the Tokara Strait decreased, but that northeast of Taiwan Island increased. The variability of the transport east of the Philippines reflected the effects of the ENSO. The EOF analysis of the SSH anomaly fields showed that the first three EOFs accounted for 25.3%, 1..1.% and 1..7% of the total variance, and represented the meander mode, the ENSO mode and season mode respectively.

关键词： Kuroshio Current seasonal and interannual cycles Geosat altimeter data

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微小花蝽对小菜蛾捕食控制的能力

应用生态学报 2017年第10期28卷 3403-3408页

作者：孙丽娟衣维贤郑长英青岛农业大学山东省植物病虫害综合防控重点实验室山东青岛266109 黄岛出入境检验检疫局山东青岛266555

为了明确微小花蝽以小菜蛾卵做为饲料的适宜性及其对小菜蛾的控制能力,在室内以桃蚜作为参比猎物,研究捕食小菜蛾卵对微小花蝽生长发育、繁殖的影响,并结合捕食功能反应评价微小花蝽对小菜蛾的捕食能力.结果表明:微小花蝽取食小菜蛾卵... 详细信息

为了明确微小花蝽以小菜蛾卵做为饲料的适宜性及其对小菜蛾的控制能力,在室内以桃蚜作为参比猎物,研究捕食小菜蛾卵对微小花蝽生长发育、繁殖的影响,并结合捕食功能反应评价微小花蝽对小菜蛾的捕食能力.结果表明:微小花蝽取食小菜蛾卵能够完成世代发育,并能够正常繁育后代.取食小菜蛾卵时,微小花蝽雌、雄若虫的历期(♀:1..3 d,♂:1..2d)、成虫体长[♀:(2.1.±0.01.mm,♂:(1.91.0.00)mm]、体宽[♀:(0.87±0.01.mm,♂:(0.71.0.01.mm]、单雌产卵量(1..7±1.1.、产卵前期[(5.1.0.6)d]和产卵期[(3.7±0.4)d]均与桃蚜处理组无显著差异;雌、雄成虫寿命[♀:(1..7±1.4)d,♂:(9.1.1.3)d]显著长于桃蚜处理组[♀:(8.5±0.5)d,♂:(6.4±0.3)d];若虫存活率[(65.0±6.8)%]不及桃蚜处理组[(80.0±8.2)%],且雌性比例偏低.微小花蝽对小菜蛾的捕食功能反应符合HollingⅡ型方程.微小花蝽1.5龄若虫对小菜蛾卵的日均最大捕食量(N_(max))分别为7.5、1..3、23.3、29.1.38.7粒;雌、雄成虫的日均最大捕食量分别为39.0和26.9粒;5龄若虫对小菜蛾低龄幼虫的日均最大捕食量为41.3头;雌、雄成虫的日均最大捕食量分别为40.8和23.9头.单头雌、雄微小花蝽一生中最多可捕食小菜蛾卵(71..3±58.1.和(535.4±30.6)粒,小菜蛾低龄幼虫(371.9±52.0)和(253.9±32.3)头.微小花蝽以小菜蛾卵饲养可行,且对小菜蛾具有良好的控制作用.

关键词：微小花蝽小菜蛾桃蚜生长发育繁殖捕食功能反应

非设计工况下叶片扩压器与离心叶轮间非定常流动的二维数值模拟

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上海交通大学学报 2003年第12期37卷 1937-1941页

作者：王彤谷传纲刘正先上海交通大学机械与动力工程学院上海200030 天津大学力学系天津300072

以一实验用离心压气机内叶片扩压器与叶轮间耦合流动为研究对象,采用动静部件统一的计算方法,对叶片扩压器与离心叶轮间二维流场在非设计工况下的非定常流动进行了数值模拟,并与无叶扩压器与离心叶轮间定常流场进行比较.与测量结果比较... 详细信息

以一实验用离心压气机内叶片扩压器与叶轮间耦合流动为研究对象,采用动静部件统一的计算方法,对叶片扩压器与离心叶轮间二维流场在非设计工况下的非定常流动进行了数值模拟,并与无叶扩压器与离心叶轮间定常流场进行比较.与测量结果比较表明,本文的计算结果具有一定的可信度,并由此说明了非设计工况下,动静部件干涉对流动的影响.

关键词：非定常流动非设计工况数值模拟