基于96单片机控制的现场仪表研究

现场总线（Fieldbus）是一种全数字化、双向、多站的通信系统。开放性、分散性与数字通讯是现场总线系统最显著的特征。CAN总线是现场总线中比较容易实现、价格低廉的一种．其性能却不比其他现场总线差,在众多领域被广泛应用。基于96单片机控制的现场仪表就是基于CAN总线的现场仪表。概述了现场总线和CAN总线的发展以及技术特点,并给出具体的软硬件设计。     

论转型期农民政治冷漠现象成因与乡村治理分析

当前,农民的政治参与存在着一种较普遍的政治冷漠现象,这种状况将成为村民自治进程的障碍和困境。分析了农民政治冷漠成因,对于改善村庄治理,推进村民自治,构建农村和谐社会提出了一些建议性措施,希望能为促进中国农民更广泛和更真实的政治参与提供启示。     

对分课堂教学模式(PAD)在教学过程实施中的影响因素研究

对分课堂教学模式以教与学的师生权责对分以及清晰易操作的明确环节在近几年被较多应用在课堂教学中,对教与学产生了许多积极的影响,具体在对分课堂教学实施过程中哪些因素起到较多作用是个值得探究的问题。本文通过问卷调查法和文献资料法针对对分课堂教学过程实施中的影响因素进行研究,分析得出教师教学理念和精力投入、学生学习理念和自主性以及学校政策支持等重要影响因素。     

关于搞好离异家庭子女教育的几点思考

现代教育教学过程中对离异家庭子女这一特殊群体的教育工作是班主任工作的重点，也是难点。因此只有管理好离异家庭背景的学生，才能完善班主任工作，从而更好的完成教书育人的工作。     

Evaluation of Energy Saving Operational Modes for Industrial Fracture Connected Processes on the Basis of Incubation Time Fracture Criterion

A problem for a central crack in a plate subjected to plane strain conditions is investi-gated. Mode Ⅰ crack loading is created by a dynamic pressure pulse applied at a large distance from the crack. It was found that for a certain combination of amplitude and duration of the pulse applied, the energy transmitted to the sample has a strongly marked minimum, meaning that with the pulse amplitude or duration moving away from the optimal values, minimum energy required for initiation of crack growth increases rapidly. The results obtained indicate a possibility to optimise energy consumption of different industrial processes connected with fracture. Much could be gained in, for example, drilling or rock pounding where energy input accounts for the largest part of the process cost. Presumably further investigation of the effect observed can make it possible to predict optimal energy saving parameters, i.e. frequency and amplitude of impacts, for industrial devices, e.g. bores, grinding machines, and hence significantly reduce the process cost. The pre-diction can be given based on the parameters of the media fractured (material parameters, preva-lent crack length and orientation, etc.).     

Um Compasso Para Aprender: A Randomized Trial of a Social-Emotional Learning Program in Homicide-Affected Communities in Brazil

Despite global demand, the large-scale effects of social-emotional learning (SEL) programming in developing countries remain underexplored. Using a randomized control trial, this study examined the effectiveness of a school-wide SEL intervention—Programa Compasso (PC)—among 3,018 sociodemographically diverse, Portuguese-speaking children (M_age = 9.85 years) attending 90 public primary schools across Rio de Janeiro, Brazil in 2017. Average impacts of PC on children’s executive function, emotion knowledge, and behavior problems after one school year were null. Moderation analyses did, however, reveal evidence for positive impacts of PC on children’s labeling of emotional expressions and inhibitory control within low-homicide communities (d = 0.15 SDs), and null effects on these same outcomes in high-violence areas. Implementation and cultural considerations are discussed.     

西方金融创新研究综述及评析

20世纪70年代以来,金融创新层出不穷,并极大地改变了国际金融体系。Van Horne(1985)认为金融创新是金融系统发展的根基,是高效且反应快捷的资本市场的生命之源。随着金融创新重要性的不断提升,越来越多的学者对此产生了研究兴趣。目前     

我国科技创新极化度的区域比较——兼论区域科技和谐度的构建

科技创新极化是科技资源优先聚集形成的极点，并与周边落后地区形成两个极端的现象。科技创新极化度作为对极化现象测度的指数，与科技发展非和谐性具有对应性，因此科技创新极化度对科技和谐度的构建具有重要启示。对我国东、中、西部科技创新极化度进行了实证研究，并得出了我国区域科技和谐度总体上升的基本认识。     

中国细辛属花粉形态研究

本文对中国细辛属Asarum27种及4变种、1变型的花粉形态分别做了光学显微镜和扫 描电镜的观察和照相，发现该属花粉的萌发孔变异较大，可作为分亚属及分种的重要依据之 一。花粉粒外壁纹饰主要分两类：瘤状纹饰下为网状纹饰，或瘤状纹饰下为脑纹状纹饰。细辛 亚属与杜衡亚属间的界限较明显，与植物形态分类的结果基本一致。本文还讨论了国产及日 本产双叶细辛A．caulescens Maxim和华细辛A．sieboldii Miq．在花粉形态上的差异，并对植物外部形态上彼此相似的几个种的花粉的形态特征做了比较。