Study on organic Rankine cascade refrigeration system powered by medium-grade geothermal energy

To utilize medium-grade geothermal energy, a thermodynamic model of organic Rankine cycle cascade refrigeration system was developed, in which R245 fa,R600a,R141 b were used as the refrigerant of high temperature stage（HTS） and R744 was used as the refri

Energy-saving Technologies Based on Positive and Inverse Cycle

Energy is one of the pillars of the social development, and it is an important factor in the economic development and social progress of human society. In recent years, for the energy demand is more and more huge, the energy supply has become a bottlenec

线驱动连续型机械臂设计与运动学仿真

面向复杂空间环境的需求，设计了一种新型线驱动连续型机械臂。基于几何分析方法提出了一种简单的线驱动连续型机械臂建模方法，分析了单级柔性关节的关节空间、驱动空间和操作空间之间的运动学映射关系，给出了三级柔性关节的解耦运动学算法，利用改进的蒙特卡洛法描述其工作空间，并用Matlab对机械臂进行运动学仿真，通过对原理样机的实验研究验证了运动学算法的正确性，同时展示了机械臂良好的弯曲能力

2,5-二甲基-2,4-己二烯与重氮乙酸酯环丙烷化反应及催化剂

一种２，５－二甲基－２，４－己二烯与重氮乙酸酯环丙烷化反应合成２－（２'－甲基丙烯基）－３，３－二甲基环丙烷羧酸酯的催化剂，其特征在于所述催化剂是芳胺类水杨醛席夫碱铜（Ⅱ）络合物。本发明催化剂催化２，５－二甲基－２，４－己二烯与重氮乙酸酯环丙烷化反应合成菊酸酯，无诱导期，平稳易控制，反应收率以重氮酯计可达９５％，该催化剂易合成，成本低，适于在工业生产中采用。带填