使用物理化学试题库的实践及一些建议

以物理化学为例，讨论了本单位使用自编试题库的体会，分析该题库的优点以及存在的问题，并对试题库的建设提出了一些建议。     

环境工程核心课程大气污染控制工程试题库的开发与运用

考试作为教学质量评价的基本形式,在教学考核中占有不可替代的地位。文章针对大气污染控制工程课程的特点,从题库软件选择、考核题型和内容设计、工程教育理念践行、题库内涵提升等方面展开论述。建设的大气污染控制工程试题库具备章节训练与课程考核的双重功能,且初步接轨环境专业执业资格考试。该试题库运用于环境工程专业2017级学生的课程教学中,取得了满意的考核效果,对提升课程教学质量具有较大的推动作用。     

化工热力学课程试题库的建设与改革探讨

本文对试题库建设中的建设思路、组织方法、题目选择原则、出卷原则等进行了介绍,并分析了所用化工热力学试题库平台的优势和劣势。完成建设的题库有助于解决目前国内化工热力学试题库不足的问题,为更加全面科学地考察学生的学习效果打下了基础。     

基于知识技能点的《塑料配混技术》课程试题库建设探索

试题库的建设和应用有助于提高教学质量、实现教考分离,本文以高分子材料加工技术专业课程为例,探讨了基于知识技能点构建《塑料配混技术》题库的理念、思路与建设过程,以期为高分子材料加工技术专业课程题库及职业教育等级证书考核题库建设提供借鉴。     

化工分离课程试题库编制与软件开发

为便于学校和教师能够对教与学的效果进行科学考察和实施教考分离,我们编制了化工分离课程试题库软件。本文介绍了该试题库软件编制的作用、方法与步骤。根据有关试题库建设的理论,讨论了试题库软件设计与实现的主要环节,说明了试题库参数的优化、试卷组织算法与策略的实现过程。     

工程制图课程与三维CAD软件并行开设的教学效果研究

工程制图是工科学生的一门专业基础课。随着三维 CAD软件的快速发展,其在工程制图教学中的应用越来越多。文章以两组学生为样本,研究了三维 CAD 软件的教学对学生工程制图能力的影响。 A 组为同时学习工程制图课程和三维 CAD软件的大一新生,B组为只学习工程制图课程的大一新生。研究发现,三维 CAD软件的教学对工程制图的学习有促进作用,能够提高学生的工程制图能力和创新能力。     

一个非常实用的LSP绘图工具程序

ＡＵＴＯＣＡＤ是工程设计中广泛使用的制图软件。本文叙述了有关ＡＵＴＯＣＡＤ知识、程序、安装与执行以及使用效果。     

农林院校无机及分析化学课程试题库建设

部分农林院校无机及分析化学课程试卷仍为人工命题,显现出诸多弊端,随着信息网络科技的发展,应该建立试题库系统。本文就此进行了建设该课程试题库系统的探讨,就系统基本结构、软件功能、试题采集等方面做了可行性、必要性的讨论。     

浅论《画法几何学与工程制图》试题库

随着高等教育改革的深入发展,课程考试的标准化、程序化势在必行,而试题库的建立是标准化的必由之路。基于这个观点,我们开展了《试题库》的研究,下面就试题库的建立、使用谈一点看法。 一、试题库的建立方法 试题库的建立方法有两种基本形式:一种是以试题作为基本单元;一种是以试卷作为基本单元。 (一)以试题作为基本单元 根据教学大纲的基本要求,我们把本课程的基本内容分为七个部分:     

Revit 2017在水泥厂三维设计中的应用探讨

Revit作为一款优秀的三维制图设计软件对推动BIM在设计院推广使用具有重要作用,本文介绍了Revit 2017在水泥厂三维设计中的应用。实践应用表明在项目设计开发过程中,无论是机械设备、电气设备还是建筑构件等都是利用族工具创建的,熟练掌握族的创建和使用是有效利用Revit系列软件的关键。     

乙苯,苯乙烯的生产及合成乙苯,苯乙烯催化剂的研究进展

苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况，合成乙苯，苯乙烯所用的催化剂种类，并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。     

Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile

Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, ¹³C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc.     

生物质气化及生物质与煤共气化技术的研发与应用

总结了生物质原料的特点及生物质单独气化的缺点;介绍了国内外生物质气化技术及生物质与煤共气化技术的研发与应用现状;分析了在此领域国内外的发展趋势与前景;概括了开展生物质与煤共气化技术研发的意义。     

Comparison of the Adhesion and Cohesion of Triblock and Random Copolymers of Styrene and Butadiene

A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength.     

责任和责任心的涵义与结构

责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体.     

二甲基二烯丙基氯化铵和丙烯酰胺的合成及应用

用复合引发体系(过硫酸盐-偶氮类引发剂)和脂肪胺类氧化还原体系引发,在实验室获得了单体转化率≥98%,特性粘数高于13.6 dL/g的阳离子共聚物PDA,探讨了控制聚合物分子量的影响因素.     

钾盐资源及钾肥供需情况分析及预测

阐述了国内外钾盐资源及钾肥生产现状,对国内外钾盐的供需形势进行了分析及预测,从资源、原材料、国际市场三方面提出了解决我国钾盐短缺的措施。     

Electronic structures and reactivities of monometallic and bimetallic clusters of Au and Cu

The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu₃Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu₃Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters.     

Wetting properties of homopolymers and copolymers of pentafluorostyrene and methylacrylate and homopolymer blends

Polypentafluorostyrene (PPFS), polymethylacrylate (PMA), and poly(pentafluorostyrene-co-methylacrylate), poly(PFS-co-MA) were prepared and the wetting characteristics of polymer blends of PPFS and PMA were compared with that of poly(PFS-co-MA) via contact angle measurements. The critical surface tension of polypentafluorostyrene was found to be 22.6 dyne/cm, which is comparable to the value reported for polytrifluoroethylene (22 dyne/cm). The critical surface tension of poly(PFS-co-MA) is not linearly related to its composition. The polymer blends of PPFS and PMA exhibit significant surface enrichment of the fluoropolymer. The harmonic-mean method¹ was employed to determine surface tensions of these polymers and many known polymers. It is found that the method produces useful surface tension data provided the contact angle values are derived from testing liquids of dissimilar polarity.