常用化学绘图软件对比分析

介绍了常用化学绘图软件ChemWindow、ChemDraw、ChemSketch、ISIS/Draw,并对这四种化学绘图软件在界面、模板、化学结构绘制、分子结构的检测、绘图操作进行了比较。     

CorelDraw7

Corel Draw7是一个仅运行于Windows95和NT4的软件包,该软件不再支持以前的操作系统。不过,Corel Draw7通过提高性能和增强功能对此予以补偿,这将使用户忘记早期的版本。当许多公司使其软件具有Internet功能来进行软件升级时,Corel公司则彻底改进了它的界面并充分利用32位操作系统的功能。 在Corel Draw7中改进最大的就是界面,想必你已感觉到。Corel Draw6是一个由滚动条、菜单和工具条组成的迷宫,而Corel Draw7则实现了属性工具条,利用它毋需通过繁琐的     

ChemOffice软件在超分子化学教学中的应用

介绍了Chem Office软件中Chem Draw与Chem3D组件在绘制大环分子结构式、分子间弱相互作用力、模拟大环主体分子空腔大小等方面的优势,探讨了其在教学方法改革方面的应用。通过Chem Draw软件可将传统单调、枯燥的化学结构和抽象的化学概念变得形象生动,激发学生学习兴趣,帮助学生更好地掌握知识。同时希望能有助于超分子化学多媒体课件的制作,进一步提高超分子化学多媒体教学的效果。     

使用ISIS建立化学数据库

使用美国MDL公司的ISIS系列产品ISIS／Base、ISIS／Host构建化学数据库，该数据库可以满足科研工作需求和商业需求。     

第三讲 专用化学数据库的设计与建立

<正>在第二讲"化学数据库系统的设计策略"中,介绍了化学数据库系统的设计策略。在本期讲座中,将介绍如何利用化学数据库管理系统ISIS/BASE(MDL信息系统有限公司的产品,目前该公司已并入其他公司。)~([1])和CISOC-ChIMS~([2])分别建立专用的数据库系统——防腐剂数据库和农药代谢数据库。     

高职《化学软件应用》教改探讨

化学软件应用对于化工专业的学生已经成为必备的技能,以项目化教学的方式来讲授化学软件Ex-cel、Origin、ChemDrawI、SIS/Draw和Internet上化学化工信息检索,并对这门课程的教学作一个探讨。     

聚醚型网状聚氨酯软泡的制备

本文介绍了聚醚型聚氨酯网状软质泡沫的制备过程及其影响因素;网状软质泡沫的孔数为7～8孔/2.5cm到20孔/2.5cm。     

AutoCAD与FEAS的集成技术研究

结合有限元分析的建模模块(Super Draw Ⅱ)及 AutoCAD绘图功能的特点,通过采用数图交换格式将二者集成化使用,为设计、分析产品结构提供了一种新途径.     

世界广告素材光盘大系

加拿大COREL公司因Corel Draw而享誉世界,而其Corel Stock Library光盘大系则是广告设计、电于出版的资源宝库。     

LDJ-240/MMA接枝胶粘剂的试制

本文介绍了LDJ-240/MMA接枝胶粘剂的性质、试制机理及试验过程。反应转化率在40％左右,产品剥离强度达83N/2.5cm以上。     

用ISIS/Draw 2.4轻松绘制化学图形

概述了专业化学绘图软件ISISDraw2.4的功能和特点,通过几个典型例子介绍了ISISDraw2.4的应用和使用方法。     

Cable tray FIRE tests simulations in open atmosphere and in confined and mechanically ventilated compartments with the CALIF3S/ISIS CFD software

Fire hazard in nuclear power plants (NPPs) is particularly often investigated as potential cause of safety equipment failure and confinement loss. Many fire events recorded in NPPs involve electric cables, widely used throughout facilities. IRSN is developing the CALIF3S/ISIS computational fluid dynamics software devoted to fire simulation in large‐scale confined and mechanically ventilated compartments. This paper presents two aspects of the CALIF3S/ISIS code ability to simulate fires. The first one concerns vertical and horizontal spreading of a cable tray fire in open atmosphere using an approach based on the FLASH‐CAT cable fire spread model. Resorting to the suitable parameters of the FLASH‐CAT model based on video fire analyses of tests enables to properly compute the heat release rate of the fire. The second aspect concerns the ability to simulate the evolution and consequences of fires in confined and mechanically ventilated compartments. For these cases, the heat release rate measured during the corresponding experiment is used as input data for the calculations. The predicted evolutions of pressure or gas temperatures are in relatively good accordance with the experiments. The major discrepancy concerns gas concentrations in the fire room which is attributed to a lack of information about the properties of the fuel material.     

聚氯乙烯(PVC)装置干燥工段蒸汽消耗量设计

介绍了聚氯乙烯(PVC)装置干燥工段工艺流程和在干燥过程中所需蒸汽量的计算方法。计算出1万t/a聚氯乙烯(糊树脂)喷雾干燥过程中使用蒸汽值为1.87 t/h。     

A relational database of protein structures designed for flexible enquiries about conformation

A relational database of protein structure has been developedto enable rapid and flexible enquiries about the occurrenceof many aspects of protein architecture. The coordinates of294 proteins from the Brookhaven Data Bank have been processedby standard computer programs to generate many additional termsthat quantify aspects of protein structure. These terms includesolvent accessibility, main-chain and side-chain dihedral angles,and secondary structure. In a relational database, the informationis stored in tables with columns holding the different termsand rows holding the different entries for the terms. The differentrelational base tables store the information about the proteincoordinate set, the different chains in the protein, the aminoacid residues and ligands, the atomic coordinates, the saltbridges, the hydrogen bonds, the disulphide bridges and theclose tertiary contacts. The database was established underORACLE management system. Enquiries are constructed in ORACLEusing SQL (structured query language) which is simple to useand alleviates the need for extensive computer programs. A singletable can be searched for entries that meet various criteria,e.g. all protein solved to better than a given resolution. Thepower of the database occurs when several tables, or the entriesin a single table, are cross-correlated. For example the dihedralangles of proline in the fourth position in an -helix in highresolution structures can be rapidly obtained. The structuraldatabase provides a powerful tool to obtain empirical rulesabout protein conformation. This database of protein structuresis part of a joint project between Birkbeck College and LeedsUniversity to establish an integrated data resource of proteinsequences and structures (ISIS) that encodes the complex patternsof residues and coordinates that define protein conformation.The entire data resource (ISIS) will provide a system to guideall areas of protein modelling including structure prediction,site-directed mutagenesis and de novo protein design. The availabilityof ISIS is described in the paper.     

国产KJKV518-SM型拉伸络筒机与新产品开发

本文介绍了国产KJKV518—SM型拉伸络筒机的性能和特点,同时介绍了开发各种新产品的方法.该机对改进国内拉伸机品种单调的状况有现实意义.     

巨型工程子午线轮胎内外轮廓的测量

设计制作了一种便携式的巨型工程子午线轮胎内、外轮廓测量工具,通过对轮胎内、外轮廓各点角度、深度的测量,利用CAD画出所测轮胎的内、外轮廓曲线,轮胎各点厚度可以在轮廓曲线上测得,从而实现在不割断面的情况下标定轮胎各部位材料分布是否合理,也可以测量国外名牌厂家轮胎,作为巨型胎研发改进的借鉴数据,测量误差1～2mm。     

含不同钾盐消焰剂的NC/TMETN推进剂熄火表面特征研究

利用扫描电镜（SEM）和能谱仪研究了含不同钾盐的NC／TMETN推进剂熄 火表面特征，研究结果表明，有机钾盐KD使用进剂熄火表面上Cu元素的含量降低，导致Pb和Cu的复合催化作用减弱，而KNO3使推进剂熄火表面碳含量降低，铅球尺寸增大，导致催化活性组分减少，催化作用减弱；K3AlF6与铅的氧化物在推进剂熄火表面形成了PbF4，从而完全破坏了铅化物的催化作用。     

VAC含量对EVA防水卷材性能的影响

探讨了EVA作为防水卷材,其材料中VAC含量对其物理性能、施工性能和产品成本的影响,得出VAC含量在5％-7％时既能保证产品成本较低而各项性能又能达到国家规定的指标值,对降低生产成本、提高企业经济效益具有一定的实际意义。