紧密牵伸压力抱合纺纱技术的机理分析(二)

通过与国内外紧密纺纱牵伸机构的对比,介绍了紧密牵伸压力抱合纺纱机构的技术创新点,并对在生产应用过程中大幅度改善成纱质量的机理进行了深入剖析。指出紧密牵伸压力抱合纺纱技术是一项投入少、见效快、质量优良、效益好、符合中国国情并且在我国具有自有知识产权和长远发展前景的创新项目,对全面提升我国纱线产品质量具有意义。     

紧密牵伸压力抱合纺纱技术的机理分析(三)

通过与国内外紧密纺纱牵伸机构的对比,重点介绍了紧密牵伸压力抱合纺纱机构的技术创新,并对在生产应用过程中大幅度改善成纱质量的机理进行了深入剖析,指出紧密牵伸压力抱合纺纱技术是一项投入少、见效快、质量优良、效益好、符合中国国情并且在我国具有自有知识产权和长远发展前景的创新项目,对全面提升我国纱线产品质量具有深远意义。     

AutoCAD精确作图在机构运动分析中的应用

在AutoCAD制图环境下,利用其精确的几何作图和图形实际尺寸的方法进行机构运动参数分析,与机械原理中机构运动分析解析法相对照.结果表明:AutoCAD的高精度几何作图和查询图形实际尺寸方法具有简单、直观、精度完全满足分析要求.     

静电纺定向排列微/纳米纤维束的湿热牵伸

静电纺射流在溶液浓度相对较大的情况下鞭动不稳定性较小,而且会以电势梯度最大方向为轴发生高速旋转,基于该基本原理,借助于常规平面铝板作为接收装置,获得了高度定向排列的微/纳米纤维集合体。为了将该定向排列微/纳米纤维束作为原丝通过预氧化和炭化处理制备微/纳米炭纤维,研究了湿热牵伸处理对定向排列微/纳米纤维结晶度和力学性能的...     

Computer-aided design of rolling mills

Computers have been used for design of rolling mills since 1960s. Easy access to high speed digital computers has facilitated use of more accurate rolling theories for design work and comprehensive computer simulations have been developed for all types of mills. These simulations include optimization of roll pass sequence, calculation of roll force, torque and temperature and detailed time studies for productivity calculations. These aspects of mill simulation are examined with specific examples. In the design of rolling mills equipment, computer-aided design has been widely used. The available software, which covers both steady state and dynamic analysis of items such as mill stands, drive systems, manipulators, cooling beds, roll cooling, and automatic gauge control systems, is reviewed with special reference to the nature of analysis and range of applications. Computer drafting is being increasingly used by rolling mills designers for both interactive and non-interactive applications. The integration of computer graphics with the design software holds promise for improving the productivity and creativity of designers and is an active area of development in rolling mills design organizations. A specific application where such integration has been achieved is discussed.     

新建铁路项目中竣工资料的收集、整理与编制

结合赣龙铁路第十八合同的施工实际，对铁路建设项目中种类繁多、数量庞大的施工技术资料的收集、整理归档和最后竣工资料的编制工作进行探讨。     

模糊控制在滤毒通风系统中的应用

介绍了模糊控制在滤毒通风系统中的应用、基本算法和设计步骤。     

CAD and Management of Construction Projects

The increasing interest in computer‐aided design (CAD) has prompted research that is aimed at identifying the opportunities for construction managers and building contractors. It has been found that the use of CAD systems in the U.K. is mainly confined to the production of detailed drawings. Indeed, most of the systems used are 2‐D drafting tools and incapable of supporting the integration of even modest amounts of nongraphical (construction) data. On the other hand, many 3‐D modeling systems have the potential to integrate construction data, although they appear to be almost ignored. The use of 3‐D modeling systems is considered to be the most suitable vehicle for successfully integrating these data. However, this is likely to necessitate the introduction of separate databases, preferably of the relational type. The use of 3‐D modeling systems in assessing the construction implications of outline designs also presents interesting possibilities and is discussed.     

通用炮兵地图符号库的算法设计及实现

从符号库的算法入手 ,提出了一套通用炮兵地图符号的划分方案、结构设计及相应的实现方法     

异面绉组织矩阵的设计与计算机实现

为了加快异面绉组织的设计过程,提出了一种基于随机分组法的异面绉组织纹板矩阵和穿综矩阵生成方法.对十片综绉组织纹板矩阵、穿综矩阵的构造过程进行了分析,并运用计算机验证了所提出方法的有效性.研究结果表明,提出的异面绉组织矩阵的设计方法可以快速产生效果较好的异面绉组织.