基于负反馈理论的半导体激光器驱动器的设计与仿真实验研究

本文设计出了一种实用的大功率半导体激光器驱动器,它可提供恒流和恒功率两种驱动方式,采用深度负反馈控制原理实现稳定控制。重点介绍了恒流驱动电路原理,并应用Multisim7进行软件仿真实验研究。在此基础上还设计了保护电路。     

不断改革教学方法,努力提高实验课质量

本文针对学生的实际问题,联系实际,在植物生理学实验的教学过程中,不断改进教学方法,并介绍了提高实验课质量的具体做法。     

Language roulette – the effect of random placement on refugees’ labour market integration

Placement of refugees and subsequent labour market integration within a host country represents a key challenge for policymakers and has emerged as one of the most divisive topics in the public debate. Immigration policy in Switzerland adopts random placement of asylum seekers across its different language regions. Hence, this policy allows to estimate the causal effect of language skills on employment chances, as refugees are exogenously placed across regions where the spoken language could either match or deviate from individual language skills. The results of this ‘natural experiment’ indicate substantially higher probabilities of finding employment when asylum seekers are placed in regions with a lingua franca that matches their individual language skills. Additionally, the findings suggest that language course participation can offset the reduced likelihood of employment in cases of a language mismatch. While random placement of refugees may be desirable for political reasons, it is detrimental to the economic integration process. Thereby, the study draws relevant conclusions for a larger European immigration policy.     

包头师范学院有机化学实验教学改革探索

本文介绍了有机化学实验课程教学中存在的问题,初步探讨了包头师范学院化学、应用化学专业在有机化学实验教学过程中对实验教学内容、实验教学方式、实验室三废处理、学生成绩评定等方面进行的改革以及取得的成果。     

信息技术与高中数学课程整合探究

信息技术与数学课程整合已成为必然趋势,各种教学辅助软件的出现使教师应接不暇。数学软件Maple凭借其简单的操作和强大的功能等优势被越来越多的数学教师作为辅助教学软件。本文用数学实验的方法介绍了Maple在高中数学教学中的几个应用实例,并对信息技术与课程整合与传统教学法之间的优缺点进行了比较。     

How Sunday, price, and social norms influence donation behaviour

We describe a natural field experiment investigating donation behaviour. The setting was an art gallery where donations could be deposited into a transparent box in the foyer. Two aspects of the donation environment were manipulated: signs on the donation box and the initial contents of the box. We used three sign treatments: a control with no sign, a sign that thanked donors, and a sign that indicated donations would be matched. We used two initial contents treatments: one with relatively little money ($50) and one with four times as much. The average donation per donor was significantly larger in the $200 treatments but this was offset by a decrease in the propensity to donate. In the matching treatments donations were significantly larger both at the per donor and per visitor level. A control variable turned out to have the largest influence on donation behaviour: the day of the week. The average donation per visitor was 51% higher on Sundays, when compared to every other day of the week.     

建立教育实习基地的实践与思考

本文主要就高等师范院校的实习方式进行探讨,并以我院为例,说明了建立教育实习基地和专业教育教学研究试验基地是解决高等师范院校实习难和提高教育实习质量行之有效的方法     

基于B/S的机房动力和环境监控模拟实验系统

探讨基于B/S结构的网络化模拟实验室的构建,并以机房动力和环境监控系统为实验对象,用网际组态软件W ebAccess实现集数据采集、视频监控、安防消防等综合模拟实验平台的开发。     

论教师在物理实验教学中的作用

结合当前实验教学情况,分析教师在实验教学中所起的作用,提出在整个教学过程中教师应作为设计者、促进者、组织管理者、反思者和研究者,以确保实验课的教学效果。     

《水文地质学》实验教学改革的探索

水文地质学实验是水文地质学课程教学体系中的一个重要组成部分。面对新形势下高等专业人才培养的要求,从实验教学内容、教学方法和实验考核评价机制等方面,探索出水文地质学实验教学改革的思路和方法,使其有利于提高实验教学效果弄口学生的动手能力及创新能力,从而为培养优秀的水文地质专业人才提供服务。