Interfacial adhesion measurement of a ceramic coating on metal substrate

The interfacial adhesion measurement of a ceramic coating on a metal substrate is studied by three-point bending (3PB) technique. In the measurement, interfacial cracks are induced during the 3PB test, and the interfacial energy release rate is calculated from the released energy per unit crack surface area during crack extension under the fixed displacement conditions. A finite element analysis (FEA) model encompassing the plastic behavior of the metal substrate is developed to simulate the 3PB test and extract the energy data. The inputs to the FEA model include the crack length, the maximum and critical loads corresponding to crack initiation, and the mechanical properties of the coating and substrate. A MoB/CoCr ceramic coating/stainless steel substrate system is investigated by the technique for demonstrating the utility of the technique.     

基于Ansys的相变墙体节能效果分析

基于Ansys软件建立数学模型,计算分析不同厚度的混凝土分别与不同厚度定形相变材料组成的相变墙体的传热特性和节能效果。计算结果表明,相对于两种不同厚度混凝土墙体,增加定形相变材料起到了很好的节能效果;定形相变材料的最优厚度需要从各方面综合考虑确定;随着定形相变材料的厚度的增加,墙体内表面温度波动幅度近似呈线性减小。     

SCR脱硝催化剂活性的测量和应用

选择性催化还原(SCR)技术的催化剂活性K是体现催化反应系统传质和化学反应速率的综合性特征值,它不仅与催化剂材料组分有关,而且与其几何结构以及应用中的流动条件等因素相关.K作为评价催化剂性能的重要指标,已广泛应用于催化剂产品质量认证及运行中催化剂的剩余活性评估中.催化剂活性测量装置主要有中试装置和小试装置2种.在催化剂质量认证及评价中均需要使用催化剂活性K的绝对值,因此K必须采用中试装置测量.SCR反应器潜能P是评价SCR装置性能的综合性指标,定期测量P值,追踪其变化趋势对SCR装置的经济运行大有裨益.     

Detection of aflatoxins in tea samples based on a class‐specific monoclonal antibody

An enzyme‐linked immunosorbent assay (ELISA) using a monoclonal antibody was established to detect aflatoxin B₁ (AFB₁) in tea. The antibody was prepared from a hybridoma derived by fusing Sp2/0‐Ag14 myeloma cells and immunised spleen B cells. The effects from pH, ionic strength, and organic solvents on immunoassay were optimised and the 50% inhibition (IC₅₀) value was 0.057 ± 0.007 ng mL^?1. Spiked black and green tea samples at 10, 20 and 50 ng g^?1 levels of AFB₁ were detected with this proposed ELISA. The recoveries for black tea samples ranged from 68.5% to 117.7% and 73.5 to 114.3% for green tea samples. This immunoassay showed no cross‐reactions with other mycotoxin family but good recognition with related aflatoxins. These results indicate that the ELISA assay could be used as a screening method for aflatoxin detection in tea samples.     

太原市电力供给与经济发展依从关系探讨

探讨太原市电力供给与经济发展相互依存关系，分析电力消耗对各产业的经济价值，为太原市产业结构调整和经济可持续发展提供科学依据。     

Rhodia opened R＆D centre in Chinc

Engineering plastics supplier Rhodia has inaugurated its International Research ＆ Development Centre in Shanghai. It is the company＇s fifth such facility and is intended to spearhead its innovation into the Asia-Pacific zone.     

10%吡虫啉可湿性粉剂防治柑桔褐圆蚧田间药效试验

应用吡虫啉防治柑桔褐圆蚧，结果表明，１０％吡虫啉可湿性粉剂１０～３０ｇ／６６７ｍ＾２对该虫具有较强的控制作用，尤以２０～３０ｇ效果最为理想，控制期长达３０天以上，对柑桔及其主要天敌瓢虫和草蛉安全性好。     

浙江省建筑强省体系的构建

通过对浙江省建筑业发展现状与存在问题的分析,以及国际建筑业的比较研究,提出了建筑强省的概念和基本特征,构建了浙江省建筑强省规划指标以及发展目标,设计了构建建筑强省的政策保障体系。     

微混凝土抗滑模型桩的地震动力弹性反应试验研究

为研究原型钢筋混凝土抗滑桩的加固效果和地震动力反应,采用微混凝土抗滑模型桩制作了高位单排抗滑桩加固边坡模型,进行了动力离心模型试验,测量了地震作用下边坡变形、反应加速度和在较高桩位条件下抗滑桩静动力弯矩等反应规律.结果表明:在地震作用下,微混凝土模型桩在加固边坡模型中有足够的抗弯承载强度,仍处于弹性工作范围内.进一步分析而表明,抗滑桩对周围土体的约束和由此形成的土拱效应使得桩体附近土体的反应加速度略有减小,抗滑桩加固是有效的.     

交流励磁机改装为副发电机的分析研究

安康水电厂装有 4台 2 0 0MW的水轮发电机组 ,并同轴装有 10 0 0kW的交流励磁机。由于该电厂设计年代较早 ,近期准备对机组进行增容改造 ,原交流励磁机容量偏小 ,需更换为静止可控硅励磁 ;同时 ,拟将交流励磁机改造为 3 0 0 0kW的副发电机 ,以发挥其效益。经委托东方电机厂对交流励磁机改装为副发电机的可行性进行论证 ,并经有关专家研究分析 ,认为该项改造技术是可行的 ,并具有明显的经济效益。