网络信息流量测量仪技术研究

目前网络通信的计量计费主要采用基于电信运营商服务器端的软件集中计量计费方式。本文研究的“网络信息流量测量仪”,可适应用户端信息流量计费,连接在用户端计算机与电信网络之间,弥补了电信运营商统一后台计费方式存在的诸多缺陷。     

基于AT89C51单片机的简易频率计的设计

为了解决市场上各种多功能、高精度数字频率计高价格的问题,本文通过综合分析实际工作的要求,选择市场上低价格的常用元件,由单片机产生闸门时间与时钟等基准信号以减少外围电路,从而提出了一种基于单片机(AT89C51)为主控制核心、LCD1602为显示界面的频率计设计方案。本方案可满足简易频率计体积小、成本低、精度高、可测频带宽的市场需求。     

城市电力抄表人员的最优路径选择问题研究

本文针对城市中有单行道情况下的电力抄表人员的最优路径选择问题,将该问题与广义中国邮递员问题进行了类比分析。在确定了两者的类比关系后,对广义中国邮递员问题的整数规划模型进行了改进和修正,并用于求解抄表人员的路径选择问题,最后通过算例分析演示了该模型的求解效果。     

基于M—BUS接口电路的研究

M—BUS（MeterBus）仪表总线是一种低成本的户用电子系统,可以实现公共事业表的联网和远程抄表功能。公共事业表包括户用电表、水表、热量表等计量仪表。本文讨论仪表总线M—BUS和TTL（Transistor—Transistor Logic）电平之间的接口电路的设计,论述了其通信中的发送和接收机制,并提出了硬件上的设计方案。所设计的接口电路传输距离远、带负载能力强、可靠性高、抗干扰能力强。     

方言中的虚词"溜溜"

“溜溜”在官话方言区普遍被使用，它在各地方言中的共时存在反映着它的历时演变。本文立足于方言材料，探讨了“溜溜”的起源及词义引申的状况，并从韵律学的角度解释了“溜溜”使用中的一些特殊现象。     

A Competency-Based Approach to Secondary Student Teaching in Physical Education

Abstract

The purpose of this study was to investigate the effects of a competency-based approach to secondary student teaching in physical education. Secondary physical education student teachers (N = 7) were observed along with one class of students from each teacher's assignment during baseline and intervention conditions. Seven categories of teacher behavior and two categories of student behavior were observed with an interobserver reliability of 94%. Behaviors were observed by event and placheck recording procedures and were converted to rates per minute and percentages. These rates per minute and percentages were analyzed by behavior profiles and a multiple baseline design. Teacher behaviors included positive reactions to on-task behavior, negative reactions to off-task behavior, positive instructional feedback both general and specific, corrective instructional feedback both general and specific, and pupil contacts using the pupil's first name. The student behaviors included appropriate/inappropriate behavior and active/inactive behavior. Intervention consisted of a competency-based learning module, instructions, graphic feedback, cuing, reinforcement, weekly goals, and terminal goals. The module contained specific definitions of the behaviors, examples of when to emit the behaviors, baseline means for the behaviors, and a final, terminal goal for each behavior. Results indicated that the intervention strategy appeared to have a large positive effect on the following teacher behaviors: positive general feedback, positive specific feedback, specific corrective feedback, and the use of pupil's first names. Smaller increases occurred in the categories of positive reactions to on-task pupil behavior and general corrective feedback. A small decrease occurred in the negative reactions to off-task pupil behavior. Both categories of pupil behavior showed a small increase in the desired direction. Based on these results and the limits of the study, the data-based observation system combined with the competency-based format appeared to exert a measure of accountable control over the behavior of seven teachers and the behavior of their classes.     

住宅电能表的发展浅析

在分析感应式电能表存在问题的基础上，重点论述了全电子式电能表的特点、类型、功能及选用．着重指出，以全电子式电能表取代感应式电能表已势在必行，而集中式多用户全电子式电能表符合我国国情，具有很好的发展前景．     

对影响男子110 m栏成绩因素的分析

通过查阅文献资料，对中外优秀男子110m跨栏运动员的技术特征进行分析。研究表明：平跑速度、过栏技术和跨栏节奏是影响110m栏成绩的重要因素。     

近体诗校读中的“依律辨误”——以河西方志著录艺文为例

地方史志中收录的历代艺文,因各种原因,在文字上多有讹误。其中的近体诗,因属依律而作,所以我们在编辑校阅过程中,可以依据基本的格律知识来发现其中的错谬。现以河西方志为主,举例分析近体诗校读中的"依律辨误"问题。     

影响中师女生800m成绩因素的灰色关联分析

本文应用灰色系统理论和方法，以太谷师范1983—2002年历届女生800m跑成绩最优者的身体形态、机能和素质为数据序列，分析影响中师女生800m跑成绩的因素，为教学和科学选材、运动训练提供依据。