大学教育内容的发展趋势

随着社会的进步和人类的发展,大学教育内容的确定问题日益复杂和迫切.面对现代世界和其中发生的各种迅速变化向教育体系提出日益增多的要求,如何避免课程的超载?按照哪些标准来选择教学的科目与教学模式?怎样在重要的科目之间保持平衡?怎样为每个科目选定最基本的、首要的和较次要的内容?在教育内容中加强理论和实践之间的联系可采取什么途径与办法?设计教育内容等等都是构筑教育内容新体系之前首先要思考的又是特别棘手的问题.……     

就业结构的变化趋势与高等教育结构的调整(上)

就业结构是一个动态的概念,其影响的因素是多方面的. 　　一、影响就业结构的主要因素 　　就我国目前的状况分析,影响就业结构的主要是:世界经济社会发展的宏观大背景;我国刚刚加入世贸组织;我国社会主义初级阶段的基本国情三大因素. 　　……     

A calcium sensor in the sodium channel modulates cardiac excitability.

Sodium channels are principal molecular determinants responsible for myocardial conduction and maintenance of the cardiac rhythm. Calcium ions (Ca2+) have a fundamental role in the coupling of cardiac myocyte excitation and contraction, yet mechanisms whereby intracellular Ca2+ may directly modulate Na channel function have yet to be identified. Here we show that calmodulin (CaM), a ubiquitous Ca2+-sensing protein, binds to the carboxy-terminal 'IQ' domain of the human cardiac Na channel (hH1) in a Ca2+-dependent manner. This binding interaction significantly enhances slow inactivation-a channel-gating process linked to life-threatening idiopathic ventricular arrhythmias. Mutations targeted to the IQ domain disrupted CaM binding and eliminated Ca2+/CaM-dependent slow inactivation, whereas the gating effects of Ca2+/CaM were restored by intracellular application of a peptide modelled after the IQ domain. A naturally occurring mutation (A1924T) in the IQ domain altered hH1 function in a manner characteristic of the Brugada arrhythmia syndrome, but at the same time inhibited slow inactivation induced by Ca2+/CaM, yielding a clinically benign (arrhythmia free) phenotype.     

复线电气化区段施工感应电对人体的危害及防护对策

感应电会对人体造成伤害。从电磁感应和静电感应原理入手，分析了产生感应电的过程，并就如何防止感应电的危害提出了防护对策，有一定实用价值。     

PB在企业管理系统中与多种数据库的连接

分析了使用面向对象数据库软件Power Builder开发煤气公司一表一卡管理系统过程中，对SQL Server和Visual Foxpro两种不同数据库的连接，提出了解决新系统与旧系统的数据兼容问题。     

链条炉存在的问题及解决方法

从炉排横向配风不均、风室压火、煤层厚度阻力及锅炉燃烧等方面分析了链条锅炉存在的问题，并针对存在的问题提出了相应的解决办法。     

Modeling and Control of Active Suspensions for MDOF Vehicle

The conventional method for analyzing active suspension control for a vehicle is only to analyze a quarter or half car with a lower order degree-of-freedom (DOF) model, but such models do not actually model practical applications. Accurate models of a suspension control system require a multi-degree-of-freedom (MDOF) vehicle model with a detailed model of the controller. An MDOF model was developed including the influence of factors such as the engine, the seats, and the passengers to describe vehicle motion using a reduced order model of the controller designed by using the H∞ control method. The control system performance has been investigated by comparing the H∞controller with a linear quadratic (LQ) controller.     

Microbial degradation of bitumen

Summary A blown bitumen Mexphalte R 90/40 with a high content of saturated hydrocarbons was degraded by several microorganisms to the same extent. In batch cultures ofSaccharomycopsis lipolytica, maximal biodegradation was estimated to be about 9% w/w, 3.2·10^–3 g/cm² and 3.1·10^–3 cm of degraded bitumen. The Mexphalte R 90/40 degradation rate was closely coupled to biofilm formation. The microbial activity concerned predominantly the oxidation of saturated hydrocarbons. A direct distillation bitumen 80/100 with a low content of saturated hydrocarbons and a high content of aromatic hydrocarbons and resins was more resistant to biodegradation.     

关于毛泽东的反对错误倾向的分析与思考

毛泽东关于反对错误倾向的思想是非常深刻、非常系统的。完全可以说,毛泽东关于反对错误倾向的思想是一整套严密的理论。我们应该学习和继承这一理论。但在反对错误倾向的问题上,毛泽东有沉重的经验教训值得我们记取。