在学生中实行核心读者制的初步尝试

<正> 去年,我们在学生中实行了核心读者制,深受同学们的欢迎.所谓核心读者,就是一部分思想品质较好,热爱学习,热心图书馆工作,办事认真负责的学生读者.核心读者应履行的义务是每周定日定时到图书馆工作一定时间(暂定     

西南联大办学奇迹背后的原因探析

西南联大堪称为中国现代高等教育史上的一个奇迹。本文分别从思想、办学理念、管理、师资、人才培养等方面对西南联大在极端艰苦的条件下却取得如此巨大成就的原因进行了探析。     

攻防技击在简化太极拳教学中的应用初探

文章结合简化太极拳教学特点,对在教学中讲解、演练动作攻防含义的教学效果作了比较性研究,并从生理和心理的角度探讨了其在教学实践中的有效作用,得出结论:讲解、演练攻防动作在简化太极拳教学中具有较强的可行性。     

体育教师非权力性影响力探析

体育教师对学生的影响力有权力性和非权力性之分。结合体育教学实践活动，阐述了教师非权力性影响力的内涵，强调了其在体育教学中的意义；认为体育教师非权力影响力的构成因素包括：品格因素、情感因素、知识因素和才能因素。     

洛克惩罚教育的心理学诠释

惩罚教育是洛克教育思想的组成部分,他在《教育漫话》中对惩罚教育进行了相关的阐述。从心理学的角度诠释洛克对惩罚教育的态度及惩罚教育的方法,挖掘其中所蕴涵的心理学思想,对现今学校的品德教育有一定的启迪意义。     

“食品检验分析”教学改革的探讨

“食品检验分析”课程存在行动指导性,内容能够与日常生活中常见的问题结合在一起。为此,本文阐述了教学改革中实施的要点和取得的效果。扩大了学生的知识面,激发了学生的学习兴趣,培养了学生实际动手操作和思考的能力,为学生今后踏上工作岗位打下基础。     

大学教育对创新人才培养的分析

从分析培养创新精神所需的保障条件出发,结合现代大学教育所能提供的资源,通过层次分析法建立模型,利用专家调查法确定各层次因素间的相对权重,对大学生创新性的培养进行了分析,使大学教育可以根据自身的资源条件为创新人才的培养提供支持和保障。     

Microcalorimetry studies of the antimicrobial actions of Aconitum alkaloids

The metabolic activity of organisms can be measured by recording the heat output using microcalorimetry. In this paper, the total alkaloids in the traditional Chinese medicine Radix Aconiti Lateralis were extracted and applied to Escherichia coli and Staphylococcus aureus. The effect of alkaloids on bacteria growth was studied by microcalorimetry. The power-time curves were plotted with a thermal activity monitor (TAM) air isothermal microcalorimeter and parameters such as growth rate constant (μ), peak-time (T_m), inhibitory ratio (I), and enhancement ratio (E) were calculated. The relationships between the concentration of Aconitum alkaloids and μ of E. coli or S. aureus were discussed. The results showed that Aconitum alkaloids had little effect on E. coli and had a potentially inhibitory effect on the growth of S. aureus.     

Optimal linear attitude estimators via geometric analysis

Three optimal linear attitude estimators are proposed for single-point real-time estimation of spacecraft attitude using a geometric approach. The final optimal attitude is represented by modified Rodrigues parameters (MRPs). After introducing incidental right-hand orthogonal coordinates for each pair of measured values, three error vectors are obtained by the use of dot or/and cross products. Corresponding optimality criteria are rigorously quadratic and unconstrained, which do not coincide with Wahba’s constrained criterion. The singularity, which occurs when the principal angle is close to π, can be easily avoided by one proper rotation. Numerical simulations show that the proposed three optimal linear estimators can provide a precision comparable with those complying with the Wahba optimality definition, and have faster computational speed than the famous quaternion estimator (QUEST).     

基于步进电机的流苏丝线绕制机智能控制器的设计

针对流苏丝线绕制过程中对动力机构的控制要求,系统设计以ATMEL89S52系列单片机为核心控制器,采用SANY0步进电机作为动力机,利用东芝公司的TB6560AHQ步进电机细分驱动器和ATMEL公司的I2C总线器件AT4C02芯片对系统掉电时的实时速度、圈数和转向等数据进行保护,实现了丝线绕制过程中对力矩、转向、速度、圈数和捻度等参数的精确控制,减轻了工人的劳动强度,提高了流苏的生产质量和效率.