我国项目管理的现状分析与对策

本文对项目管理的意义和现状进行了分析,对我国项目管理中存在的问题进行了探讨,并提出了针对性的建议。     

标杆管理的精髓及其应用的探讨

本文从理论的视角对标杆管理的精髓进行了探讨,从实践的结果对标杆管理在电力勘察设计行业及其企业中的应用进行了分析,对应用中出现的主要问题提出了建议。     

On Weakly Semicommutative Rings

A ring R is said to be weakly scmicommutative if for any a, b ∈ R,ab ＝ 0 implies aRb (∈) Nil(R), where Nil(R) is the set of all nilpotcnt elements in R.In this note, we clarify the relationship betveen weakly semicommutative rings and NI-rings by proving that the notion of a weakly semicommutative ring is a proper generalization of NI-rings. We say that a ring R is weakly 2-primal if the set of nilpotent elements in R coincides with its Levitzki radical, and prove that if R is a weakly 2-primal ring which satisfies α-condition for an endomorphism α of R (that is, ab ＝ 0 (→) aαα(b) ＝ 0 where a, b ∈ R) then the skew polynomial ring R[x; α]is a weakly 2-primal ring, and that if R is a ring and I is an ideal of R such that I and R/I are both weakly semicommutative then R is weakly semicommutative.Those extend the main results of Liang et al. 2007 (Taiwanese J. Math., 11(5)(2007),1359-1368) considerably. Moreover, several new results about weakly semicommutative rings and NI-rings are included.     

双重分离全自动控制空气分离器工作过程分析

讨论分析双重分离全自动控制空气分离器的工作过程及影响因素。     

甲醇储罐开车前的化学清洗

报道了某一煤化工项目中甲醇储罐及连接管线的清洗实践。     

酯化法合成丙酮酸乙酯的研究

论述了以丙酮酸、乙醇为原料,离子交换树脂作催化剂,催化合成丙酮酸乙酯的新工艺。考察了催化剂种类、用量、原料配比、反应时间以及催化剂使用次数等因素对酯化率的影响,确定了催化剂种类和最佳工艺条件。结果表明,732强酸性离子交换树脂具有良好的催化活性和选择性,可多次重复使用,酯化率可达85.7%,产品质量符合国家标准。     

Carrying capacity for the electromagnetic suspension low-speed maglev train on the horizontal curve

Aiming at the lateral dislocation between the electromagnets and the rails on a horizontal curve,we investigated a single magnetic bogie of the maglev train in this paper.The magnetic levitation and guidance forces supplied by the suspension modules were deduced by the flux tube method.According to the dynamic equilibrium equations of the maglev train on the curved track with cant,several major factors that influence the carrying capacity were analyzed,and the formula of the carrying capacity was presented....     

盾构移位调头时钢珠型重载移动装置的应用

当盾构在封闭式竖井内移位调头时,采用钢珠重载移动装置,相比传统的解体、吊装再组装的方法,可以明显缩短工期,减少工程费用。此方法对于盾构移位调头施工有很大的借鉴意义。     

实践技能教学方法的探索

根据高等职业技术教育培养目标的要求,在电力类专业教学计划中,增设了"电气工程图阅读实训"教学内容.在教学实践中,率先引进"引导探究"教学法,剖析了它在职业技术教育中应用的优越性.实践证明,引导探究教学法的引进是必要的,具有可行性.     

基于IP的互连互通系统的设计和实现

移动式互连互通系统能够在IP层上实现多种通信网络的互连,具有良好的移动性以及强大的连通能力,在自然灾害、紧急事故、突发安全事件中起着重要的应急通信作用。文章结合具体的电力行业工程实施方案．研究了互连互通系统的构成、原理以及涉及到的关键技术,分析了系统的实现方法,介绍了系统的功能。