72 research outputs found
Static Characteristics and Simulation of the Electro Magnetic Proportional Multi-way Direction Valve in the Scope of Micro-regulation
根据电磁比例多路换向阀的结构及工作原理,建立其微调区间的静态特性数学模型,并借助MATlAb语言进行计算机仿真.结果表明,电磁比例多路换向阀的微调特性良好,先导阀输入电流与多路阀输出流量接近线性比例关系,有利于工程机械的精确控制.According to the structure and working principles of electro magnetic proportional multi-way direction valve,its mathematical model with static characteristics in the scope of micro-regulation was set up,and MATLAB language was employed in computer simulation,with the result that the electro magnetic proportional multi-way direction valve had good micro-regulation characteristics,and there was a linear proportion relationship between the input electric current of the pilot valve and output flow rate of the multi-way direction valve,which was advantageous for the accurate controlling of engineering mechanism.福建省科技厅重点项目(2006H0032
孔雀疏螺旋体病的诊疗报告
疏螺旋体病是鸡、火鸡、鹅和鸭的一种急性败血性传染病,这早有资料记载。但孔雀患螺旋体病尚属罕见,也未见报导。我地区公园90年初从外地引进孔雀4只,8月4日发病2只,8月5日死亡1只,相隔5天,第2只死亡。经临床观察,剖检变化及实验室检验,确诊为疏螺旋体病。现将诊疗情况报告如下
Production of ethylbenzene by alkylation of benzene with dilute ethylene obtained from ethane oxidative dehydrogenation with CO2
丙烯与苯烷基化反应分子筛催化剂的研究进展
介绍了丙烯与苯烷基化生产异丙苯的工艺及催化剂进展,在工艺上采用论蒸馏;在催化剂 使用丝光沸石、ZSM系列Y、β、MCM系列等分子筛催化剂催化丙烯与苯烷基化,已取得一定成果
Debris Flow Disaster Prevention Education for Residents in the 921 Earthquake Reconstruction Area:A Case Study of Chung-Liao Village Nantou County
用于低温下由乙烯和丁烯制丙烯用催化剂及制法和应用
一种用于低温下由乙烯和丁烯通过反歧化反应制丙烯的催化剂,组成为活性组份和载体,活性组份为钼的氧化物和/或钨的氧化物,其重量担载量为0.5-20%,载体为氧化铝或含氧化铝的混合物,载体中氧化铝的重量含量至少为50%。该催化剂的制备方法为:首先用常规方法制备颗粒状混合物载体,然后用提供钼和/或钨元素的溶液浸渍前述粒子,干燥后于400-850℃焙烧,制得所需催化剂。还可以任意重复上述浸渍和焙烧步骤。在压力为0.1-10.0MPa,温度为0-200℃的条件下,该催化剂用于由乙烯和丁烯制丙烯的反歧化反应中,可以在固定床或流化床或浆态床反应器中进行。带填
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