开设数学实验提高学生素质

众所周知,中学物理、化学、生物等学科的学习包含了实验,并且实验给学生提供了建构并发展该学科认知结构的良好环境。在发达国家中,数学实验已经成为常见的教学形式,美国的中学里有专门的数学实验室,而我们的教师对数学实验则显得认识不足、缺乏经验。全日制义务教育《数学课程     

脑脊液中单纯疱疹病毒抗原检测和临床评价

本文采用ELISA双单克隆抗体夹心法检测14份拟诊为中枢神经系统病毒感染患者脑脊液(CSF)标本中单纯疱疹病毒(HSV)抗原。结果表明:有8份标本出现阳性,即约57％可测出HSV抗原。其中7份标本结果与间接ELISA检测CSF和血清HSV-Ⅰ～Ⅱ型抗体结果比较,两者有较好的一致性。提示ELISA双单克隆抗体夹心法检测临床标本中HSV抗原,具有简便、特异、敏感等优点,4h内即能获得检测结果,适用于HSV性脑炎(HSE)的早期诊断。     

论城市林业是构建生态城市的重要组分

城市林业是建设生态城市的内容之一,而城市绿化又是城市林业建设过程中的主要环节,它所具有的生态、社会和经济效益与城市植被构建体系中植物种类、布局和生长状况密切相关。在城市植被系统构建过程中不仅要重视绿地数量,更要注重绿地质量,注重园林植物多样性及发挥最佳观赏和防护功能。     

对高职教学中理论知识“够用适度”的几点认识

在高职教学中，理论知识“够用适度”具有一定的前提条件，相关范畴、实质内涵和评价方式等。笔将对此进行探讨。     

Density functional theory study of the adsorption of elemental mercury on a 1T-MoS<Subscript>2</Subscript> monolayer

Elemental mercury has become a global concern because of its significant impact on human health and the ecosystem. A lot of effort has been put towards the removal of elemental mercury from the 2H-MoS₂ (prismatic structure of MoS₂). However, the mechanism of 1T-MoS₂ (polytype structure of MoS₂) in Hg⁰ capture remains unexplored. In this study, density functional theory (DFT) was adopted to investigate the adsorption mechanism of Hg on a 1T-MoS₂ monolayer. The different possible adsorption positions on the 1T-MoS₂ were examined. For different adsorption configurations, the changes in electronic property were also studied to understand the adsorption process. The results elucidated that chemisorption dominates the adsorption between Hg⁰ atoms and the 1T-MoS₂. It was found that the T_Mo (on top of the Mo atom) position is the strongest adsorption configuration among all the possible adsorption positions. The adsorption of Hg⁰ atoms on the 1T-MoS₂ monolayer is influenced by adjacent S and Mo atoms. The adsorbate Hg0 atom is found being oxidized on the T_Mo position of the 1T-MoS₂ with an adsorption energy of ?1.091 eV. From the partial density of states (PDOS) analysis of the atoms, the strong interaction between Hg⁰ and the 1T-MoS₂ surface is caused by the significant overlap among the d orbitals of the mercury atom and the s orbital of the S atom and p and d orbitals of the Mo atom.     

Science Letters：Mask synthesis and verification based on geometric model for surface micro-machined MEMS

INTRODUCTION When designers develop microelectromechani- cal system (MEMS) devices with the traditional ap- proach, they should devise the mask-layouts and fabrication process instead of the function and shape of the MEMS device. The geometric model of the MEMS device is then derived based on the simulated fabrication according to the devised mask layout and the process. This is analogous to generating a geo- metric model from the NC tool paths in the macro world. Obviously it is uni…     

走出职业的迷航——读《哈佛职业生涯设计》

最近,你是否产生过这样的念头啊,如"现在我这个公司好象出现了一些问题,我要提前做些准备再换一份新工作"、"在这个岗位我做的很不舒心,我怎么才能找到合适的工作啊"等等这类问题,当今的时代是不断变革的时代,人们普遍感到竞争的激烈和工作的不稳定,这就要求我们要精心策划我们的未来,建立以职业市场为导向的职业规划,只有这样我们才不会被社会所淘汰。     

成人学习研究考略--基于梅里安的追述

从“Andragogy”(成人教育学)到“Self-Directed Learning”(自我导向学习)渗透着有关成人学习问题的重要思考。本文主要试图基于美国著名成人教育理论家梅里安对于“Andragogy”和“Self-Directed Learn-ing”的追述,来对成人学习研究的变化脉络做一简略的考察。     

生理学“线粒体DNA突变”研究的新进展

生理学中“线粒体DNA(mtDNA)”研究近年来取得重大进展 ,学者们十分关注它的突变与人类疾病的关系。本文综述了mtDNA的结构 ,遗传特点 ,突变类型和几种常见的综合症及临床症状 ,力求展示出研究的新进展     

《精细化学品工艺学》网络课程的设计与开发

《精细化学品工艺学》网络课程是利用Vclass平台和多种软件工具，开发出的具有交互性、共享性、自主性等特点的，以职业技术教育和成人教育为使用对象的网络课程。在此，主要介绍了该网络课程的设计开发思想、特点及其它相关问题