移动通信2G向3G演进分析与策略

本文在描述ＧＳＭ和窄带ＣＤＭＡ向３Ｇ演进过程之后,从电信制造和移动运营两个市场层面上对３Ｇ国际市场演进情况进行了分析。在我国巨大的移动市场上,作者认为目前网络情况出发,向ＷＣＤＭＡ演进在网络覆盖、保护投资、国内支持等方面具有优势。     

刀片服务器技术与标准分析

分析了刀片服务器的发展沿革以及当前的技术、专利和标准状况，以期为将来我国高性能计算机自主标准的制定工作提供参考。     

电子认证与授权管理标准体系研究

以国际上在标识、鉴别与授权标准方面已有的工作为基础，提出了我国电子认证与授权管理标准体系框架。     

1300V,1600V高压IGBT的实现

本文基于理论分析和实验研究，分别在ｎ＾－／ｎ＾＋／ｐ＾＋外延和硅单晶基片上实现了１３００Ｖ及１６００Ｖ高压ＩＧＢＴ；并进而证实了获得高压ＩＧＢＴ相互联的关键技术──器件纵向横向几何结构及工作参数的准确计量优化，低缺陷密度高性能厚层硅材料的工艺生长技术，和复合高压终端结构的叠加组合形成。     

生物薄试样电镜X射线显微定量分析法进展

本文重点介绍应用Hall理论进行生物薄试样电镜X射线定量分析的原理和近年来运用此理论进行分析所采用的有关扣除背底、峰剥离、外源性背底校正以及标样等技术。文中还描述了“薄试样”的条件,介绍了近年运用Link公司开发的分析软件测定各元素的标样参数(FST)、根据标样参数对生物薄试样进行元素分析的方法。     

现代电信网运行维护的技术支持系统

在电信网达到一定规模，网路建设速度放慢之时，在设备 应商的名费技术支持到期后，数千万端口多种型号的交换设备和大量传输设备的技术支持由谁来承担？中国电信将采用什么策略 技术手段来保障维护部门能及时得到优质高效的技术支持？本文作者长期从事本地网网管和集中监控系统的开发和工程实施，深深感到与网管配套的运行维护技术支持系统在电信支撑网的建设中的重要性。     

Quality measurement and use of pre-processing in image compression

Traditional quality measures for image coding, such as the peak signal-to-noise ratio, assume that the preservation of the original image is the desired goal. However, pre-processing images prior to encoding, designed to remove noise or unimportant detail, can improve the overall performance of an image coder. Objective image quality metrics obtained from the difference between the original and coded images cannot properly assess this improved performance. This paper proposes a new methodology for quality metrics that differentially weighs the changes in the image due to pre-processing and encoding. These new quality measures establish the value of pre-processing for image coding and quantitatively determine the performance improvement that can be thus achieved by JPEG and wavelet coders.     

Policy recommendations to promote shale gas development in China based on a technical and economic evaluation

Because of its resource potential and clean burning advantages, the development of shale gas can significantly increase the supply of cleaner energy while offering the associated benefits. To foster shale gas development, many policy incentives have been introduced in China. However, the current incentives have not been sufficiently aggressive, and the shale gas industry has been slow to develop. Existing policies thus need to be further improved. To provide effective support for decision makers in China, a technical and economic evaluation is performed in this study to explore the profitability of shale gas production in pilot zones. The results show that shale gas production is subeconomic under the current technical and economic conditions. Based on this evaluation, a policy analysis is conducted to investigate the profitability improvement offered by the major policies available in China to elucidate a path toward improving incentive policies. The results indicate that policy instruments related to gas prices, financial subsidies, corporate income taxes or combinations thereof could be used as priority options to improve policy incentives. Based on these results, recommendations are presented to improve the current incentive polices aimed at accelerating shale gas development.     

不对称盒形件落料拉伸复合工艺及其模具设计

通过工艺分析，对传统工艺进行了改进，采用了落料拉伸的复合结构应用于不对称的盒形零件的加工，解决了单工序模由于零件形状不规则而产生的定位不可靠、下料繁琐等问题。介绍了复合模具的结构设计及工作过程.经生产验证，该模具性能可靠，运行平稳，提高了产品质量和生产效率，降低了劳动强度和生产成本。     

Southern spanish windmills: Technological aspects

This paper shows the study carried out in a doctoral thesis about windmills in south-east Spain, in the area of Campo de Níjar in the province of Almeria. It intends to pay homage to Spanish windmills as a way of commemorating the fourth centenary of the masterwork of Spanish Literature, ‘Don Quixote’ in which the silhouette of the windmill is a pervading symbol.Wheat milling has been an important factor in the socio-economic development of rural Spain for centuries. The type of mill used depended on the energy resources available, wind or water. In the Campo de Níjar (Almeria, Andalusia, Spain), wind is the principal energy source, and therefore, windmills were widely used, as in other areas of Spain. In this paper, we study the technological conditions of these old windmills, we carry out a wind evaluation of the area, and we calculate the power and momentum of these windmills with a discussion of the results found.