加强企业能力建设向国际型工程公司模式发展

华北电力设计院工程有限公司在改制过程, 全面加强企业能力建设, 实现从“改革效益型”企业向“素质效益型”企业转变, 走国际型工程公司之路, 使企业竞争力不断提高。     

某电厂扩建工程桩基分析和治理

某电厂扩建工程厂区因地质条件极为复杂,部分桩基出现了桩端位于陡坎处或位于鹰嘴岩上、桩底沉渣过厚等问题。通过多种检测手段查清了桩基问题的类型,并提出了“结构连、浆液灌、基桩补、碎石铺”的综合治理方案。     

电力需求侧管理(PDSM)综述

介绍了电力需求侧管理(PDSM)的基本概念和国外的实施情况,阐述了我国实施电力需求侧管理(PDSM)的紧迫性和可行性,分析了在我国实施电力需求侧管理(PDSM)的支持环境和技术支持措施,提出了有待进一步研究的问题。     

Engineering Properties of Expansive Soil

The components of expansive soil were arwdyzed with EDAX, and it is shown that the main contents of expansive soil in the northern Hubei have some significant effects on engineering properties of expansive soil. Furthermore, the soil modified by lime has an obvious increase of Ca^2 and an improvement of connections between granules so as to reduce the expansibility and contractility of soil. And it also has a better effect on the modifted expansive soil than the one modified by pulverized fuel ash.     

Influence of Heating on the Structure of Hyaluronan

1Introduction Hyaluronan(HA)isakindofpolysaccharideofa highmoleculeweightcommonlyexistingintheextra cel lularmatrix(ECM)ofthevertebrate.Recentlymuchre searchhasbeendoneonapplyinghyaluronantothescaf foldintissueengineering[14].Preliminaryresultsofheat degradationhavebeenreportedforHA[5],howeverthe selectingofheatingtemperatureseemsabitrandom.In thisarticle,theauthorselectedtheheatingtemperature fromtheDTAcurve.Sincehyaluronaniscommonlyused underanimalheat(36.5℃40℃),thisstudydoesnot havec…     

两用燃料汽车的振动噪声特性

试验研究了捷达LPG/汽油两用燃料汽车的振动噪声特性。主要测量了发动机缸体和座椅的振动情况 ,对比分析了匀速和加速时燃用汽油和LPG的噪声特性。试验结果表明 :两用燃料汽车使用LPG时 ,发动机机体振动幅值比使用汽油时小 ;而加速过程中 ,在较低转速下使用汽油噪声较大 ,在较高转速下使用LPG噪声较大     

Large Deployable Space Antennas Based on Usage of Polygonal Pantograph

This paper describes large space antenna projects based on application of a closed polygonal pantograph truss used for transforming, deploying, and prestressing the reflector structure. Their reflecting surfaces represent a flexible mesh fabric. Two means of maintaining the surface are discussed herein. The first technique is associated with employment of forces of the gravity field gradient. The second is based on the use of a flexible carcass prestressed by internal forces applied to the pantograph. Reflectors of the second kind have a rather complicated mechanical structure depending on the way of their attachment to a carrier. Provisions are made for supporting the reflector by an articulated arm linked with its central interface and through the use of tube beams, supporting the reflector periphery structures. During the design of the reflectors, special attention was paid to the problems of their structural simulations at the stages of their launching, deployment, and orbital motion. The deployable antennas considered can be enabling elements for many space missions ranging from communications to other satellite systems, including radar, remote sensing, interferometry, wireless power transmission, etc. They exhibit an enhanced stiffness of structure, required for the digit tele- and radio-communication and navigation, which makes it possible to diminish ray scattering, to raise the power of the accepted signals, and to prevent frequency losses.     

Material Control System for the Manufactured Housing Industry

A manufactured home is a factory-built house constructed in a controlled factory environment according to federal standards known as the Department of Housing and Urban Development (HUD) code. The manufactured home shares approximately 20% of the total housing units in the United States and plays an important role in providing affordable housing. However, in terms of material engineering, advanced techniques are scarcely used in the manufactured housing (MH) industry. The current material flow and control systems are characterized as independent demand systems that are based on the personal experience of the material managers. Although independent inventory control systems are widely used in many manufacturing industries, these systems lead to a large amount of inventory and have many drawbacks for the MH industry. On the other hand, dependent inventory systems can reduce unfavorable inventory levels using new techniques and present substantial benefits for the MH industry. This paper applies lean inventory control systems and supply chain management techniques to the current systems of the MH industry and proposes a new framework of material control systems as one of the system management tools.     

空间网格结构分析设计软件MSTCAD的应用

介绍了空间网格结构分析设计软件的特点,阐述了其设计要点,提供了4个工程应用实例,可供工程设计参考。     

基于JAVA技术的工程图学网络习题系统的设计与实现

以工程图学网络化教学为目的,针对目前各种工程图学网络习题系统的优势和不足,提出一种引入移动教育的系统构建方案。系统是以 JAVA 技术为开发手段,依据工程图学教学的特点而设计的网络习题系统。系统包括了运行于因特网上的有线部分和运行于无线网络上的无线部分,有文件上载、数据库和文件系统、图形平台等几大模块,能实现绘图,自动批改等多种功能,涉及到的技术包括无线上网技术,J2ME 无线应用等。