Simulation Propagation of Partial Discharge UHF Signals in Transformer

Many factors affect the propagation of ultra high frequency(UHF) signals caused by partial discharge(PD) on the waveforms and energy of signals in transformer.To investigate the relationshi Pof factors and UHF signals,simulation model of transformer for PD study are established.UHF signals in simulation model of transformer caused by PD are calculated using finite difference time domain method.By means of amplitude and cumulative energy plot of simulation signals,and combing the measured result,the following factors:distance between PD source and detection position,different metallic conductor position around detection position and iron core and winding are researched,which contribute to comprehend the propagation characteristic of UHF signals and detect UHF signals accurately.     

Inspiration to Reuse of Old Industry Building with SOHO

This paper analyzes the SOHO and the reuse of old industry building, and deeply explores the creation and application of SOHO mode in the reuse of old industry building, furthermore, it points out the four inspirations to the reuse of old industry building, at the end, a general judgment of the development logic of SOHO is given.     

Analysis of Project Audit''s Function and Civil Action

Audit takes a unique status and has obvious function in financial surveillance system.The Audit is used to superintend the factuality,validity and virtue of fiscal and financial income and expenses.In the renewed China Audit law the functions and status of official audit have been intensified,and the qualification and status of Audit department as executing office is confirmed.This paper analyzed the official construction project audit's function and legal status.     

On a New Lower Order Exact Penalty Function

For the inequality constrained nonlinear programming problem, the antnors propose a new lower order penalty function, which combines the classical l1 penalty function and the lower order exact penalty function introduced in thoy some papers, and then illustrate that it has the merits of the two penalty functions. In additional, we propose a solution method for solving the inequality constrained nonlinear programming problem and prove its global convergence.     

黄淮夏大豆形态性状的遗传研究

本文以黄淮地区6个夏大豆品种(系)通过双列杂交保留下来的F_3代材料,研究大豆6个形态性状的遗传特性.结果表明,株高、有效分枝数、主茎节数、主茎荚丛数和茎粗5个性状均符合加性—显性模型.而底荚高则存在非等位基因之间的互作效应.株高、有效分枝数、主茎节数和主茎荚丛数为部分显性,茎粗存在超显性现象.主茎节数和主茎荚丛数可能有相似的遗传特点.豫豆8号大豆带有较多的控制株高的显性基因,油84-30大豆带有较多的控制分枝和茎粗的显性基因,而尖顶大白角大豆控制主茎节数和美丛数的显性基因较多.     

热泵式节能烘干机的设计

热泵是一种使热量从低温介质流向高温介质,以对高温物体进行供热的装置.为此,利用热泵原理研究设计了一种小型高效节能烘干机,并介绍了该机的主要特点、总体结构等,尤其对热泵、烘干床进行了详细介绍.该机具有结构简单新颖、造价低廉、使用寿命长、高效节能等优点,不仅可以烘干多种农产品,还可以烘干茶叶、蘑菇等多种农副产品.     

梯级水电站补偿效益分摊方法研究

为了真实地体现梯级水电站的补偿效益，从分析影响梯级水电站补偿效益分摊的主要因素入手，提出了几种单因子分摊方法、综合分析法以及模糊综合评判法，建立了分摊数学模型，以汉江支流岚河梯级补偿效益分摊为例，将不同方法计算结果进行对比，提出了不同条件下梯级水电站补偿效益的合理分摊方法。     

减弱光照强度对水稻叶片气孔性状的影响

采用改良刮制法研究了典型粳稻，典型籼稻，偏籼型，偏粳型和陆稻等10个水稻品种的气孔性状，研究结果发现，剑叶的气孔密度在水稻类型间和品种间具有明显差异。是一个品种特性，光照强度减弱使各品种上三叶的气孔密度明显减少。其原因是由于叶面积增大，气孔行数减少和每一行中相邻气孔间距离增大共同作用的结果。品种不同，其气孔密度对光强变化的反应亦不同，光照强度减弱对剑叶气孔大小有显影响。     

分布式异构数字资源整合概述

 

对分布式异构数字资源的整合检索模式、整合协议、资源连接方式、编码等几个方面

进行了概括介绍。