摘要：The heat exchanger network(HEN) synthesis problem based on entransy theory is analyzed. According to the characteristics of entransy representation of thermal potential energy, the entransy dissipation represents the irreversibility of the heat transfer process, the temperature difference determines the entransy dissipation, and four HEN design steps based on entransy theory are put forward. The present study shows how it is possible to set energy targets based on entransy and achieve them with a network of heat exchangers by an example of heat exchanger network design for four streams. In order to verify the correctness of the heat exchanger networks design method based on entransy theory, the synthesis of the HEN for the diesel hydrogenation unit is studied. Using the heat exchange networks design method based on entransy theory, the HEN obtained is consistent with energy targets. The entransy transfer efficiency of HEN based on entransy theory is 92.29%, higher than the entransy transfer efficiency of the maximum heat recovery network based on pinch technology.

摘要：　采用一维拉格朗日磁流体力学(MHD)程序研究了等离子体喷射轴心单丝的物理现象,给出了碰撞后铝丝受热膨胀和最后箍缩到轴心的整个过程图像,指出这一设计方法能在轴心丝上获得较高的电流上升率和较高的轴心压缩密度,并还给出了箍缩所得的功率和能量曲线。

摘要：在分析地球同步轨道目标光学特性和位置特性的基础上,确定了天基可见光(Space-Based Visible,SBV)传感器监视整个地球同步带目标的搜索栅栏位置以及搜索策略,导出搜索栅栏与观测时间和观测次数之间的关系.根据航天任务需求和SBV传感器特性,确定了监视轨道的类型和参数约束条件,给出了约束条件下监视轨道的选取范围,并对其轨道观测效能进行仿真分析.仿真结果表明,通过适当选取监视轨道参数,监视轨道对地球同步带的覆盖率均可达到90%以上.如果SBV传感器视场达到4°×4°以上或搜索栅栏宽度大于40°,其覆盖率高达95%以上.