混合硫醇催化共氧化反应过程催化剂的有效因子研究

用室内实验的方法对气-液-固三相催化反应体系中不同粒径催化剂催化下混合硫醇的氧化反应动力学进行了研究,并依据球形催化剂假设,采用薄膜理论对反应体系中硫醇浓度分布进行了分析,计算出不同粒径催化剂的有效因子.结果表明,随着催化剂粒径减小,催化剂的有效因子增大,表观反应速率常数增加.     

基于曲线段对称点的辅助射击训练系统的靶心定位

提出了一种基于曲线段对称点的射击系统靶心定位算法,该算法通过计算靶图的对称点,能够准确地计算靶心,具有对边界噪声不敏感的优点,速度上满足实时处理的要求,即使在信息量严重丢失情况下,也可以得到良好的效果.仿真实验证明了所提算法的有效性.     

对我国中小企业实施ERP系统的几点思考

ERP系统作为一种先进的管理工具,得到了越来越多企业家的重视,但这样一个先进的管理系统,却难以在广大的中小企业中普及与推广,主要原因是中小企业自身和ERP供应商两个方面存在一些问题,主要问题有对ERP系统认识不到位、内部管理跟不上、领导重视不够、企业缺乏ERP系统人才、系统价格过高、技术支持人员变动大等。我们可以通过加强学习、加强企业内部管理、争取领导的重视和支持、加强对员工素质的培养工作等措施来提高ERP系统实施效果。     

剪力墙截面厚度设计研究

文章主要研究剪力墙结构体系中剪力墙截面厚度变薄对承载力、轴压比、结构刚度、墙体稳定性和地震作用的影响;分析了墙体变薄可能带来的问题,并提出了相应的处理措施。     

让溺爱远离孩子——从《高老头》透视家庭教育的弊端

高老头在女儿身上倾注了所有的爱，到头来却遭到女儿的抛弃。这种家庭教育方式的失败对现代家庭的父母在教育子女的问题上极具教育和启迪意义。家庭教育不应是无原则的爱，溺爱会使孩子失去独立意识和承受挫折的能力，影响健全人格塑造，对个人、家庭及社会都会产生不利影响。父母应通过正确的方式策略教育孩子，这样才能收到良好的效果。     

亚洲企业家:迈向成功的52步

你是否会经常有想自己做生意念头但又不知从何做起?放弃一个稳定而又安全的工作而自谋出路会使人产生一种发自内心的胆怯。“做,还是不做”,这是一个问题。无论作出怎样的选择,生活都将不再相同。 中国有句古话叫做“千里之行始于足下”。勇敢地迈出第一步是战胜胆怯的关键。《亚洲企业家》杂志整理了52项意见,恰好在一年中一     

Adhesion of PBO Fiber in Epoxy Composites

The high mechanical and thermal performance of poly p-phenylene- 2, 6-benzobisoxazole ( PBO ) fiber provides great potential applications as reinforcement fibers for composites. A composite of PBO fiber and epoxy resin has excellent electrical insulation properties, therefore, it is considered to be the best choice for the reinforcement in high magnetic field coils for pulsed magnetic fields up to 100 T.However, poor adhesion between PBO fiber and matrix is found because of the chemically inactive and/or relatively smooth surface of the reinforcement fiber preventing efficient chemical bonding in the interface, which is a challenging issue to improve mechanical properties. Here, we report the surface modification of PBO fibers by ultraviolet (UV)irradiation, O2 and NH3 plasma, as well as acidic treatments. The interfacial adhesion strength values of all the treatments show the similar level as determined for aramid fibers by pull-out tests, a significant impact on fibermatrix-adhesion was not achieved. The surface free energy and roughness are increased for both sized and extracted fibers after plasma treatments together with maleic anhydride grafting. The sized fiber shows marginal improvement in adhesion strength and no change in fiber tensile strength because of the barrier effect of the finish.For the extracted fiber, different surface treatments either show no apparent effect or cause reduction in adhesion strength. Atomic force microscopy (AFM) topography analysis of the fracture surfaces proved adhesive failure at the fiber surface. The fiber surface roughness is increased and more surface flaws are induced, which could result in coarse interface structures when the treated fiber surface has no adequate wetting and functional groups. The adhesion failure is further confirmed by similar adhesion strength and compression shear strength values when the fiber was embedded in various epoxy resins with different temperature behavior. The tensile strength of fiber is sensitive to surface treatment conditions as revealed by a bimodal Weibull statistical distribution analysis. Considerable strength reduction occurred, particularly for cases of acidic and plasma treatments, while UV irradiation shows the better ability to retain fiber strength.     

用集值统计方法对高校教师量化考核探讨

利用集值统计方法对高师院校教师量化考核做了探讨。     

微机控制设备部件检测技术的新思路--以产品自身资源为平台的自动检测技术

从对DISA-II设备的印制板组件的自动检测系统的分析入手,提出以产品自身软、硬件资源为平台的自动检测技术的新思路,并分析了其实用价值,介绍了设计要点.     

浅谈自然界能量·转化·守恒·成矿

自然界的形成、发展及其演化源于物质本身具有的能量,源于物质能量的转化和物质能量的守恒.具体而言与天地生的发展演化密切相关,主要是地质作用(包括内力地质作用和外力地质作用)产生的能量(热能、风能、水能)转化、守恒变化的结果.该文从多方面论述了能量、转化、守恒与成矿之间的关系,对地质找矿及其思维有一定的指示意义.