摘要：陕西省西安市某商住楼工程采用太阳能-空气源热泵组合热水系统,该系统已运行近两年,运行效果良好。详细介绍了太阳能系统及空气源热泵系统的设计计算、设计参数、设备选型及系统运行控制方式,并总结了设计及运行经验,可供参考。

摘要：To provide an accurate prediction of the product component dependence of temperature and pressure in vacuum distillation and give convenient and efficient guidance for the designing of the process parameters of industrial production, according to the molecular interaction volume model(MIVM), the separation coefficient(β) and vapor-liquid equilibrium composition of Au-Ag alloy at different temperatures are calculated. Combined with the vapor-liquid equilibrium(VLE) theory, the VLE phase diagrams, including the temperature-composition(T-x) and pressure-composition(p-x) diagrams of Au-Ag alloy in vacuum distillation are plotted. The triple points and condensation temperatures of gold and silver vapors are calculated as well. The results show that the β decreases and the contents of gold in vapor phase increase with the distillation temperature increasing. Low pressures have positive effect on the separation of Ag and Au. The difference between the condensation temperatures of gold and silver is about 450 K in the pressure range of 1-10 Pa.

摘要：在应用型本科高校开展主题班会时,应当基于建构主义教育理念的启示,充分运用团体辅导相关技术,为大学生构建起合理的教育环境,并与新媒体时代学生所处的媒介环境形成正向共鸣,实现涵化教育效果,以期发挥主题班会在落实思政教育立德树人根本使命,端正学风反哺第一课堂,全面提升学生综合素质的作用。

摘要：设计了一个基于STM32的老人摔倒检测系统用于检测老年人摔倒。充分考虑了摔倒检测设备的便携性,提供了详细的软硬件构建方案。采用STM32F103RCT6单片机为平台,MPU6050作为获取运动参数的传感器。通过卫星导航模块检测老年人位置信息,传感器模块获取老年人的姿态信息,微控制器对数据进行特征处理,通过和设定的阈值进行比较来确定是否符合摔倒特征。符合摔倒特征则向紧急联系人手机端发送报警信息。测试表明,所设计的系统具有便于携带、定位精准、识别率高的特点。