炼钢合金成分优化调控及应用软件系统

根据合金钢的冶炼特点,设计了炼钢过程中调整合金成分的最优化数学模型,并研制出实时运行的计算机软件系统。运行结果表明,该系统性能良好,经济效益显著,具有较高的应用价值。     

用单片机实现电动大门速度控制

本文根据电动大门对速度的要求，给出了由８０３１单片机、变频器电路及其驱动电路等组成的电动大门控制系统．本控制系统的特点是硬件线路比较简单．所设计的软件只用一个定时器即可产生频率变化的ＳＰＷＭ信号．采用本控制系统可比较经济地使电动大门按给定的速度曲线运动．因此可解决现有电动大门所普遍存在的，由于速度单一而带来的各种问题．     

参数自调整Fuzzy＋I调节器

本文针对常规模糊控制系统存在的稳态误差，对设定值的跟踪性能差等缺陷，提出一种参数自调整Ｆｕｚｚｙ＋Ｉ调节器，用智能积分器来消除稳态误差，在线自调整调节器参数以改善动态特性。计算机仿真表明这种调节器有良好的动态特性，静态特性与很强的鲁棒性。     

S-Nitrosylation of proteins

The transfer of a nitric oxide group to cysteine sulfhydryls on proteins, known as S-nitrosylation, is increasingly becoming recognized as a ubiquitous regulatory reaction comparable to phosphorylation. It represents a form of redox modulation in diverse tissues, including the brain. An increasing number of proteins have been found to undergo S-nitrosylation in vivo. These proteins are called S-nitrosothiols, and may play an important role in many processes ranging from signal transduction, DNA repair, host defense, and blood pressure control to ion channel regulation and neurotransmission. This review focuses on the importance of the S-nitrosylation reaction and describes some recently identified S-nitrosothiols in various fields of research.     

Postembryonic sensory axon guidance in Drosophila

The peripheral sensory system of the Drosophila adult has been used for the genetic analysis of axon guidance because of its accessibility for experimental manipulation and mutant screens. Wing, leg, antenna, or eye sensory axons are able to pathfind normally under different perturbations, indicating that sensory axon guidance is a highly canalized process. Similarly to other model systems, sensory growth cones seem to use multiple, simultaneous cues for guidance. In addition, sensory axons from peripheral structures seem to be capable of using alternative substrates for pathfinding. Developmental regulation could account for the high stability of axon guidance under experimental and natural perturbation conditions. Despite this flexibility, functional characterization of genes involved in sensory axon guidance is being carried out in situations where there appears to be less system redundancy.     

论宏观调控主体的法律规制

宏观调控主体是宏观调控法中的重要范畴，对其的法律规制，能够使主体的行为制度化、规范化．保障宏观调控权的实现，从而进一步完善宏观调控。     

关于行政处分的几点思考

行政处分作为管理机构对其内部成员违反法律法规或者纪律规定追究责任的一种内部具体行政行为，无论在国家机关还是企事业单位的管理工作中均普遍存在。作为一种制裁手段和惩戒措施，如果适用不当，必然会对被处分人的权益造成一定的损害，并产生负影响。现实管理工作中，管理机构性质不同，对内部成员的行政处分的依据则有所不同，处分责任类型也有差异，容易引起管理者在行政处分与政纪处分以及行政处罚之间的认识混淆。     

Oxygen intervention in the regulation of gene expression: the photosynthetic bacterial paradigm

The means by which oxygen intervenes in gene expression has been examined in considerable detail in the metabolically versatile bacterium Rhodobacter sphaeroides. Three regulatory systems are now known in this organism, which are used singly and in combination to modulate genes in response to changing oxygen availability. The outcome of these regulatory events is that the molecular machinery is present for the cell to obtain energy by means that are best suited to prevailing conditions, while at the same time maintaining cellular redox balance. Here, we explore the dangers associated with molecular oxygen relative to the various metabolisms used by R. sphaeroides, and then present the most recent findings regarding the features and operation of each of the three regulatory systems which collectively mediate oxygen control in this organism.Received 26 June 2003; received after revision 30 July 2003; accepted 8 August 2003