台山电厂DEH系统转速逻辑问题的分析及处理

针对台山电厂3、4、5号机组DEH系统转速逻辑中存在的问题，对问题进行详细的分析研究并制定出相应的对策和处理方法，彻底解决转速逻辑中存在隐患，确保机组安全稳定运行。     

解决分布式数据库2PL执行-提交冲突的一种改进的乐观方法

分布式数据库系统通常采用2PL(两阶段锁定协议)来维护其一致性.本文运用Shadow-Opt方法,通过区分写操作将新旧算法结合从而保证一致性并提高性能.     

基于SiPESC.OPT的透平低压排汽缸优化设计

针对提高蒸汽透平机组效率的需求,基于SiPESC.OPT集成软件平台,集成SolidWorks,ICEM和CFX等多个软件构建透平低压排汽缸优化设计系统.系统采用参数化建模、三维黏性流体分析和蚁群算法等多种手段,对某型号透平低压排汽缸模型进行优化设计.结果表明,优化后平均压力恢复因数提升188.31%,出口气流不均匀分布因数明显下降.该优化设计系统能有效提高透平低压排汽缸气动性能.     

冗余传感器故障诊断的最优奇偶向量法与广义似然比检验法的等效性

通过分析用于冗余传感器量测系统故障检测与隔离(FDI)的广义似然比检验(GLT)方法和最优奇偶向量检验(OPT)方法，指出用OPT方法进行FDI所存在的问题，并进行修正。证明了GLT方法和修正后的OPT方法进行FDI是完全等效(一致)的。     

免疫荧光定量分析仪设计

设计了免疫荧光定量分析仪,用以对人体血液和尿液中的各种分析物(CRP、PCT、NTpro BNP、c Tn I等)含量进行快速准确的定量分析。光源采用大功率LED灯珠,采用窄带干涉滤光片对激发光和荧光进行滤光,采用内置运放的光电转换芯片OPT101进行荧光强度的检测。采用步进电机驱动,皮带传动方式带动双排滚珠宽体滑块在单根精密直线导轨上滑动,实现对检测样品的扫描式检测。通过与标准仪器进行对比试验,结果表明样机在小型化、快速性以及低成本的基础上,测量结果准确,测量精度高,稳定性好,能满足临床应用要求。     

Mutations in the N‐terminal region of the Schizosaccharomyces pombe glutathione transporter pgt1+ allows functional expression in Saccharomyces cerevisiae

Pgt1p encodes a glutathione transporter in Schizosaccharomyces pombe, orthologous to the Saccharomyces cerevisiae glutathione transporter, Hgt1p. Despite high similarity to Hgt1p, Pgt1p failed to display functionality during heterologous expression in S. cerevisiae. In the present study we employed a genetic strategy to investigate the reason behind the non‐functionality of pgt1⁺ in S. cerevisiae. Functional mutants were isolated after in vitro mutagenesis. Several mutants were obtained and four mutants analysed. Among these, three yielded different point mutations in the N‐terminal region (301–350 bp) of the transporter before the first transmembrane domain, while one mutant contained a deletion of 42 nucleotides within the same region. The mutant pgt1⁺ proteins not only expressed and localized correctly, but displayed high‐affinity glutathione transport capabilities in S. cerevisae. Comparison of wild‐type pgt1⁺ with the functional mutants revealed that a loss in protein expression was responsible for lack of functionality of wild‐type pgt1⁺ in S. cerevisiae. The mRNA levels in wild‐type and mutants were comparable, suggesting that the block was in translation. The formation of a strong stem–loop structure appeared to be responsible for inefficient translation in pgt1⁺ and disruption of these structures in the mutants was probably permitting translation. This was confirmed by making silent mutations in this region of wild‐type pgt1⁺, which led to their functionality in S. cerevisiae. This genetic strategy to relieve functional blocks in expression should greatly facilitate the study of these and other transporters from more intractable genetic organisms in a heterologous expression system. Copyright © 2012 John Wiley & Sons, Ltd.     

光电式电压互感器的设计与实现

光电式电压互感器是一种用于电力测量系统的新型传感器。本文简要介绍了用这种互感器测量直流电压的原理,分析了系统组成的各个部分,并讨论了影响光电式互感器实用化的一些问题。     

基于OPT的生产作业计划与控制系统设计

建立符合我国企业实际情况的生产作业计划与控制系统是我国企业现代化改造和适应新的生产方式的主要问题之一。论述了建立生产作业计划与控制系统模型的基本方法,以最优化生产技术（ＯＰＴ）的基本原理为基础,结合我国企业的实际情况,对现代制造系统生产作业计划与控制系统的编制方法进行了探讨和开发应用。     

最优生产技术在企业资源整合中的运用

本文阐述了最优生产技术(OPT)的概念及主要思想,并在其理念的指导下结合我国家具企业的现状,探讨了通过设计标准化、计划平准化、生产均衡化,重新整合家具企业资源,增加企业的运作柔性,提高企业对市场的反应能力和生产效率。     

Changes in chemical composition and antioxidative properties of rye ginger cakes during their shelf-life

Changes in chemical composition and antioxidative properties of rye ginger cakes during their shelf-life were investigated in this study. In particular, the changes in antioxidants content, antioxidative and reducing capacity, and Maillard reaction development in rye ginger cakes after long-term storage were addressed. Ginger cakes produced according to the traditional and current recipe were stored for 5 years at room temperature in a dark place. The total phenolic compounds (TPC), inositol hexaphosphate (IP6), reduced (GSH) and oxidised glutathione (GSSG) contents, antioxidant and reducing capacity and Maillard reaction products (MRPs) were determined in ginger cakes after storage and then compared to those measured after baking. After long-term storage a decrease in TPC and IP6 contents in cakes was noted. In contrast, an increase in antioxidative and reducing capacity of stored cakes was observed. Long-term storage induced formation of furosine, advanced and final Maillard reaction products and caused changes in both reduced and oxidised forms of glutathione. After long-term storage the modest changes in furosine, FAST index and browning in ginger cake formulated with dark rye flour may suggest that this product is the healthiest among others. Therefore, traditional rye ginger cakes can be considered as an example of a healthy food that is also relatively stable during long term storage as noted by the small chemical changes observed in its composition.