Adsorption and decomposition of NO on carbon and carbon-supported catalysts

The interactions of NO with carbon and carbon-supported catalysts have been investigated by means Fourier transform infrared spectroscopy. Nitric oxide direct decomposition over carbon-supported catalysts (Cu, Pt) was studied in a temperature ranging from 473 to 623 K. NO conversion increased with increasing reaction temperature in the whole temperature range. The carbon-supported Pt catalyst has a very high activity for the decomposition of NO in the absence of oxygen. As a result of NO chemisorption isocyanate (-NCO) species on the surface of carbon containing Cu were observed. When the reaction temperature was increased, the -NCO band at 2229 cm⁻¹ became more intense.     

烧结钕铁硼永磁体的镍及镍磷合金镀层

综述了钕铁硼永磁体材料的表面电镀镍及化学镀镍磷合金的研究进展，提出了从铵铁硼材料的特殊性来选择恰当的前处理和镀覆工艺，就有获得优质的保护镀层。     

基于WEB和C/S的教务管理系统的分析与设计

本文是以河南经贸职业学院教务管理工作实现网络化管理的需求为背景而展开讨论的。文中详细阐述了基于WEB和C/S模式相结合的总体设计方案,通过分析系统功能的需求,阐述了系统功能模块的设计思想。     

Consumer preference not to choose: Methodological and policy implications

Residential consumers remain reluctant to choose new electricity suppliers. Even the most successful jurisdictions, four US states and other countries, have had to adopt extensive consumer education procedures that serve largely to confirm that choosing electricity suppliers is daunting. Electricity is not unique in this respect; numerous studies find that consumers are generally reluctant to switch brands, even when they are well-informed about product characteristics. If consumers prefer not to choose, opening regulated markets can reduce welfare, even for some consumers who do switch, as the incumbent can exploit this preference by raising price above the formerly regulated level. Policies to open markets might be successful even if limited to industrial and commercial customers, with residential prices based on those in nominally competitive wholesale markets.     

Prediction of the elastic behaviour of hybrid and non-hybrid woven composites

A micromechanical model called MESOTEX is presented for prediction of the elastic behaviour of composites reinforced with non-hybrid weave (plain weave, satin weave and twill weave) and hybrid weave (hybrid plain weave and hybrid twill weave) fabrics. By using the classical thin laminate theory applied to each woven structure, this analytical model takes into account the strand undulations in the two directions and also integrates the geometrical and mechanical parameters of each constituent (resin, fill and warp strands). A representative volume is chosen for each woven composite and the fibre architecture is described by several functions. To determine the effectiveness of this analysis, the elastic properties predicted for each woven composite are compared with experimental results and results extracted from the literature. This correlation shows excellent agreement between measured and predicted values, with a very low calculation cost (CPU time of less than 0·01 s).     

基于B/S网上教学资源管理平台的分析与设计

随着信息化技术的不断发展,网上教学资源管理平台已经成为目前高校教学中非常重要的工具,尤其是在当前信息技术和计算机网络技术飞速发展的时代,高校开始充分利用现有网络资源来进行教学资源管理。区别于传统的C/S模式,B/S开发模式使得高校内部用户通过校园网或者互联网就可访问本平台。本文就基于B/S模式的网上教学资源管理平台进行详细分析。     

BOSCH伺服控制系统在ZJ19B卷接机组中的应用

介绍BOSCH伺服控制系统成功应用于ZJ19B卷接机组传动系统中,使机器供丝、供纸、刀头、嘴机部分各个电机的运行更加稳定,控制精度显著提高;减少因控制精度不够而引起的非正常停机次数,提高机器的有效作业率,节约原料;同时使烟支的重量、圆周、紧头等各项指标合格率显著提高。     

基于DMT的1553B带宽扩展研究

由于传统的MIL-STD-1553B总线难以满足高速数据传输需求且更换现有总线代价过高,因此迫切需要在不影响现有基带通信的条件下升级1553B系统以提供高速通信接口。本文分析1553B的信道特性并据此选择频谱利用率高、抗频率选择性衰落的离散多音调制(DMT)作为扩展带宽的技术,基于离散多音调制,提出一个与现有通信相互兼容的扩展方案以显著提高传输速率,并对该方案涉及的关键技术进行介绍。     

高职学院财务管理信息系统的设计与实现

阐述了基于B/S模式开发湖南高速铁路职业技术学院财务管理信息系统,并详细介绍了系统的功能需求和数据库设计,以及主要功能模块的设计与实现代码。该系统将Web技术和数据库技术很好的融合在一起,使数据库成为Web的重要组成部分,实现了数据库技术和网络技术的有机结合。     

基于ASP.NET的图书馆志愿者考勤系统

针对图书馆志愿者管理工作需要,利用ASP.NET开发平台和SQL后台数据库开发出一套便于操作和维护的图书馆志愿者考勤系统,系统从需求分析、柜架设计、数据库设计、数据流程图及模块的实现等方面进行介绍。