负反馈放大器计算分析

以射极输出器为例分析负反馈放大器的各种计算方法;方框图分解法之商榷．     

用Excel绘制挥发性双液系相图

本文论述了利用Excel绘制双液系相图的方法.     

Teachers’ career ladder policy in Ethiopia: an opportunity for professional growth or “a stick disguised as a carrot?”

In response to the ever-declining status of the teaching profession, and its adverse effects on the country's educational system, the Federal Ministry of Education in Ethiopia introduced a policy of the teachers’ career ladder in 1994. While reformers believe that the introduction of the policy has improved the condition of the teaching profession, the net gains of the policy remain deceptive and even, in part, reduce some of the benefits teachers used to enjoy in the single salary scheme in the past. Among other things, central to the claims of the policy's advocates stands an improved salary scale for teachers. While this was admittedly true by the time the policy was introduced, the gain in salary raise has gradually been lost to the bureaucratic hurdles and watchdog structures erected to screen teachers’ eligibility at each stage of the career ladder. After critically assessing the major aspects of the policy, along with the voices of Ethiopian teachers, the current study argues that the policy of the teachers’ career ladder in Ethiopia is another prototypical case of a failed experiment both in terms of improving the lives of teachers and maintaining their professional rights.     

利用专利文献识别新兴技术主题的技术框架研究

解析新兴技术主题的概念,同时结合专利文献的特点,利用专利文献提出识别新兴技术主题的初步技术框架,并以工业生物技术领域的专利文献为数据来源,采用文本聚类技术、共词战略坐标分析、共词网络分析、专利分析等方法对该技术领域的新兴技术主题进行实证分析。     

Teaching profession career ladder programme in Turkey: implementation,outcomes and challenges

Turkey has implemented various programmes to increase the quality of in-service training for K–12 teachers with varying success. One of the most recent state-wide implementations of these programmes is the Teaching Profession Career Ladder Programme (TPCLP) that was put into practice in 2005. This study investigates teachers’ views related to the implementation of the TPCLP. A detailed account of the application process and teachers’ views towards the implementation will generate suggestions to raise the effectiveness of the implementation. Data were collected through semi-structured in-depth interviews. Analysis of data revealed that teachers hold direct intensive criticism towards many criteria of the TPCLP, particularly the examination. Furthermore, they have mixed perspectives as to whether the programme is effective. This study shows that career ladder implementation failed to contribute to continuous professional development of teachers and the quality of the education process in K–12 schools.     

基于词频分析的大学团队研究主题动向探析

本文在已有研究基础上,以知识管理为视角,采用词频分析法对某大学团队十年间的科研发文进行统计分析,并通过聚类分析和战略坐标图对该团队研究所形成的主题领域及热点进行战略情报分析,旨在厘清该团队的研究领域及各研究主题领域的发展趋势,从而为团队知识库的构建及团队建设与发展提供决策帮助。     

用“轨道相图”分析有心力场轨道及其稳定性

利用由比尼公式得到的“轨道相图”分析有心力为轨道的稳定性,证明平方反比有心力作用下的轨道,不论其形式如何都是稳定的,并用线性稳定性方法证明在有心力F=K~2m/r~2的作用下,质点运动轨道稳定与不稳定分界点n的取值范围为2相似文献   

基于AutoCAD的轴测图的绘制

轴测图是一种在二维模式下用线段构成的具有立体感的图形。轴测图的绘制主要依据构图原理,利用CAD工具中的相关功能实现。轴测图在进行尺寸标注时,不能直接运用标注工具进行标注,要根据所标注的尺寸类型进行必要的设置,才能得到立体感的标注效果。     

智能化模拟仿真开关量控制过程

本文提出一种智能化模拟仿真开关量控制过程的方法,以逻辑展开图作为编制模拟仿真组态程序的"脚本";区别两种开关量输入:对人工操作输入用触摸屏窗口的软元件改变PLC对应输入通道状态;对控制过程输入依照逻辑展开图确定由此输出作用而产生的输入状态,智能化设定为逻辑展开图中所要求的状态。PLC根据输入通道状态,执行梯形图程序,产生相应的输出驱动;对仿真结果进行自动判断和提示。     

导游职业能力层次构建与递进式培养策略探析

导游职业能力层次直接决定了导游的个体素质,关系到导游职业发展前景。文章对导游岗位职业能力要求进行了分析,细分了导游职业能力结构的三个层次,从职业特定能力、关键能力以及核心能力三个方面提出了导游职业能力阶梯塑造的策略。