New Algorithms for Data Discretization Based on Rough Set Theory

The discretization of real values is always one of the key problems to be solved in the domain of machine learning for its great contribution to speeding up the followed learning algorithms, cutting down the real demand of algorithms on running space and time, and improving the clustering capability of the ultimate learning results. The basic characteristics and framework of discretization approaches based on rough set model are analyzed at first, then the different measurements of the importance of candidate cuts are discussed and researched. Two new heuristic algorithms are put forward to finally select the useful cuts from a candidate set. The selected cuts of the two algorithms will adequately maintain the discernible relation of information systems for their full considering the specialty of rough set, which perfectly embodies the advantages of this theory. Moreover, excellent discretization results may be expected through these heuristic algorithms.     

Resolvent and Application of Policy Control for QoS

With the rapid increase of the Internet user and widely application of Web,the current network technology is facing great challenge. More and more multimedia operations occupy plenty of bandwidth,and result in the network congestion. Therefore,people begin to use QoS to utilize the bandwidth effectively,and ensure the transport of the emergent operation data. The paper introduces the protocols and basic components of QoS,then expatiates the conception and the basic principles of policy control QoS, moreover,emphasizes the structure model of policy control QoS and how it runs. At last,it introduces the transport process of data packets under the control of policies in a policy control QoS system,and how to make the policies in the real world.     

Parameter Design for the Power Train and Simulation of the Dynamic Performance of Elctrical Vehicle

The method and principle of the parameter design for the power train of EV is explored and discussed,then the parametersof EV. based on SC7101 are reasonably selected.The method of calculating the SOC of Lead_acid battery is provided and the relation among the electromotive force,the interior resistance, the polarized resistance and the SOC are analyzed. The capacity is compensated according to the relation between the capacity and the temperature, which is the basis on which the energy management system is designed and improved. The dynamic model which reflects the dynamic characteristics of the power train is established,then the dynamic performance of the EV based on SC7101 is simulated, and the factors that affect the continuous mileage of EV are analyzed,the measures to increase the continuous mileage are provided.The result shows that the analysis of the electric characteristics of battery and the dynamic model are correct,and the dynamic performance perfectly meets the need of the design target.     

Incentive Mechanism for Team Cooperation Based on Implicit Side Contract

Aiming at the free-riding problem in team incentive, this paper designs a dynamic incentive mechanism based on implicit side contract with dynamic game theory by introducing the reasonable assumption that there is horizontal monitor in team production. The theoretic analysis indicates that the dynamic incentive mechanism, in which a strict group incentive compatibility contract is taken at the first stage and an individual incentive compatibility contract is taken at the second stage, can implement team cooperation uniquely in the general condition of risk aversion and stochastic production by only two stage repeated game.     

酿酒葡萄延迟栽培方式的研究

利用西昌地区丰富的光热资源，以3年生真芳德和梅尔诺为试材，2000年在西昌正大葡萄试验园进行了酿酒葡萄延迟栽培的研究。摘除一次花序，对新梢分别在花后20、40、60、80d进行中梢修剪，逼迫冬芽萌发结果。结果表明：真芳德具有较强的冬芽副梢结果能力。在延迟栽培条件下，两品种的果实成熟期可推迟到11月上中旬。单株产量、果实可溶性固形物含量和总糖的最大值均出现在花后60d的处理中；各处理滴定酸均高于对照；出汁率随处理时间延迟而降低。两品种花后40、60和80d处理的果实黑痘病和白腐病的发生均低于对照。冬芽副梢成熟度良好。结果表明，延迟栽培能够有效调节葡萄成熟期并改善原料质量，但同时也造成产量的下降和生产周期的加长。     

低能离子注入后小麦苗期损伤效应研究

以鉴54、豫农118及豫麦18号为材料,研究了不同剂量率、剂量离子注入对小麦幼苗生长的影响。结果表明,随着剂量率和剂量的增加小麦幼苗损伤程度逐渐加剧,具体表现在苗高降低、第一叶长变短。剂量率间差异显著,品种间有辐射敏感性差异。另外苗期还发现了一些变异,主要表现为主叶脉失绿和形态畸形。离子束诱变的合适剂量在6×1017ions/cm2以上。     

单株幼龄苹果树修剪仿真研究

修剪是果树生产中重要的技术手段,要想研究更加合理的修剪技术体系,就必须保证能够对修剪反应有准确、直观和及时的判断,而仿真模拟技术提供了这种可能。以幼龄苹果树为研究对象,采用不同修剪处理对比的方法,在田间试验的基础上,总结修剪反应规律,构建苹果树结构和修剪模型。在此基础上基于Qt框架和OpenGL图形库,开发了单株苹果树修剪仿真软件平台。结合优化算法,通过仿真平台模拟了给定生产目标的修剪方案优化,优化结果对虚拟学习和实际生产提供了可视化指导。     

液压自由活塞发动机的节能方式研究

液压自由活塞发动机是将内燃机和液压泵集成于一体，实现动力非刚性传输的复合发动机。本文从其内部能量转换及外部能量回收两个方面，详细地分析和阐明了液压自由活塞发动机各种节能方式和实现途径，以液压挖掘机为例，强调液压自由活塞发动机作为中心液压站，结合二次调节及液压变压器技术，简单方便地实现群控节能。     

三维复合材料复合裂纹特殊边界元法

利用两相复合材料位移基本解，将受复合载荷作用下复合材料三维裂纹问题，归为求解一组超奇异积分方程，并分析了对裂纹尖端应力奇性和方程组求解理论方法；进而以反映裂纹前沿应力奇性的密度函数基本解表示位移间断，根据Taylor积分及其特征展开特性，给出方程组数值求解方法；最后，以三维矩形裂纹为例，讨论了应力强度因子（SIFs）收敛性及其变化规律。