浅析新形式下开设电子设计实验公共选修课

为适应高校实验教学改革的要求,我们面向全校开设了“电子设计实验”公共选修课,此举在全校同学中引起了强烈反响。作为实验教学的一种尝试。本文仅对在我校开设电子设计公共选修课的意义和实验方法等进行了探讨。     

V－V联接三相全波整流电路的探讨

本文在对三相十二脉冲全波整流电路和三相六脉冲全波整流电路分析的基础上，对Ｖ－Ｖ联接电路做了探讨．对Ｖ－Ｖ联接电路的两种输入方式：三相电源输入方式和两线一地制输入方式进行了比较．实验结果表明：以三相电源输入方式输入的Ｖ－Ｖ联接电路加一电容滤波后可获得满足要求的紊波因子     

生产过程控制和管理集成系统概要

介绍集成系统发展的要求，建立了生产过程控制和管理集成系统的体系结构主要框架，为分析和设计这类集成系统奠定基础。     

Do males and females think in the same way? An empirical investigation on the gender differences in Web advertising evaluation

Informativeness and entertainment are regarded as two types of advertising value that can influence consumers’ attitudes toward Web advertising. Despite of many studies on these two factors, there are two research gaps in extant literature. First, the effects of informativeness and entertainment on attitude are considered separately, yet their interaction effect is neglected. Second, the role of individual characteristics (e.g., gender) in the advertising evaluation process is far from clear. To address these two issues, a laboratory experiment was conducted to investigate the interaction effect between informativeness and entertainment, and also the moderating role of gender. The results indicate that informativeness can help form a more positive attitude for males than for females, and entertainment can lead to a more positive attitude for females than for males. It is also found that there is a three-way interaction among informativeness, entertainment, and gender. More specifically, the interaction effect between informativeness and entertainment is significant for females, but insignificant for males. Results, research contributions, and limitations are discussed, and implications for future studies are suggested.     

Utilization of beet molasses as a grinding aid in blended cements

This paper investigates the viability of using beet molasses as a grinding aid for blended cements with high volumes of mineral admixtures. Different ratios of beet molasses (0.01–0.05% by weight of cement) were added into a blended cement containing 41% of fly ash and GBFS. The influence of beet molasses on performances of blended cement was studied by comparing with one commercially available, triethanolamine-based grinding aid (TA). The results show that when comparing with the blank cement mixture, the cement containing 0.02–0.03% molasses shows a higher compressive strength at 3 days and 28 days, even exceeding the TA mixture. The improved microstructure of the molasses modified cement paste was also demonstrated by the pore structure and SEM measurements. These improvements are attributed to the better particle size distribution induced by the addition of molasses, indicating the potential application of beet molasses as a good grinding aid.     

汶川地震灾区城市供水的水质风险和应急处理技术与工艺

对汶川大地震后震区饮用水水源存在的次生污染风险进行分析,其中微生物浓度升高是首要风险,同时还存在大量使用消杀剂引起的杀虫剂污染和水源臭味增强的风险。针对这些风险,开展了一系列应急处理技术的验证性试验,提出了保障性应急处理工艺、强化吸附应急处理工艺和强化氧化应急处理工艺三种方案,以应对可能出现的震后次生水源污染,确保城市饮用水水质安全。     

丝绸科技产学研结合模式的探讨

随着我国社会主义市场经济的不断深入和发展，丝绸工业的科技开发体制也发生着深刻的变化，产学研结合的模式正在市场经济的浪潮中迈开坚实的步伐。１观念的转变 计划经济体制下，提到搞科技项目，无非是政府部门拨一部分经费给科研院所（包括高校，下同），完成一项科技项目，鉴定结束，最后到底有多少实效，能创造多少经济效益则很少有人关心，科研与生产两张皮，科技成果游离于企业之外，难以形成生产力。一方面，企业本身自主创新开发能力薄弱，另一方面，由科研院所牵头承担的科技项目，企业只作为协作方，而这种作为协作方的角色，还…     

对电容型试品末屏绝缘试验结果的分析与建议

通过大量的统计分析,提出了对电容型试品末屏绝缘试验结果正确判定的建议。     

我公司为适应新标准采取的一系列措施

为适应2001年水泥新标准的实施，对原材料的选用、熟料率值的调整、生料系统的管理加强及水泥粉磨的工艺改进第一系列措施进行了 介绍。     

DESIGN OF POLYPHASE WAVE DIGITAL FILTERS WITH APPROXIMATELY LINEAR PHASE

It is well known that IIR digital filters require quite fewer computations,comparedwith FIR filters,in order to meet stringent magnitude specifications when the phase distortioncan be tolerated.An approximately linear phase,however,can be also obtained with the IIRfilter by making use of a technique without increasing the complexity.Based on a certain numberof attenuation zeros in the pass band,a new approach is developed for the design of polyphasewave digital filters with exact magnitude responses and Chebyshev approximation of the desiredphase responses.The minimum number of attenuation zeros is estimated,and some examples areincluded.