Research on spraying process of flexible electrode for dielectric elastomer sensors

Journal of Materials Science: Materials in Electronics - Compared to rigid sensor dielectric elastomer sensors (DESs) demonstrate better conformability for human skin, and therefore, DESs become...     

相变式U形管太阳能集热器的性能

通过结合太阳能集热器与相变材料（石蜡）搭建相变式U形管太阳能集热器性能测试平台,探究和对比与普通的U形管太阳能集热器在产水量和集热性能的表现。实验结果表明：石蜡的应用可以使U形管集热器的产水量增加462g,持续时间延长0.5h。在测定的工况条件下,相变式U形管太阳能集热器集热效率在夏季和过渡季节分别可以达到54.6%和28.51%。此外,随着工作介质流量的提高,夏季的有用热的提高率从38.26%降至14.66%,过渡季节有用热的提高率从38.67%降至13.85%。在实际应用中应考虑工作流量对相变式U形管集热器的影响。     

Static validation of WS-CDL documents

This paper presents an approach to validate WS-CDL documents statically. To deal with those constraints appeared in CDL documents, which cannot be captured by its meta model (XML Schema) totally, we design a machine-based constraint language based on B Method, which uses abstract machines to represent the constraints of the relations among XML nodes. After modelling the constraints, the corresponding checking algorithm can be designed to implement the static validation of CDL documents. Meanwhile, the checking algorithm is integrated into the WS-CDL editor plug-in for Eclipse project. The case studies show that our approach is effective for real examples in practice.     

邯郸地区某空气源热泵供暖系统运行性能分析

为提高空气源热泵供热系统的实际运行性能,在2019—2020 年供暖季对邯郸地区某老旧小区空气源热泵供热系统进行了现场测试,根据室外空气温湿度、系统供回水温度及流量、耗电量的实测数据和变水温运行调节方式,对系统长期运行性能进行了分析,对比了4 种工况条件下的系统运行特性。测试分析结果表明：对于整个供暖期的能耗而言,分阶段变水温调节有利于促进空气源热泵节能运行。邯郸地区冬季室外相对湿度较高,容易导致空气源热泵运行效果不佳、供热量不足。此时在分阶段变水温调节的基础上采用分时段变水温调节,有利于改善系统运行效果,供暖期第Ⅱ阶段的COP′由1.63提高至第Ⅲ阶段的1.76,提高了8%。     

Web Services事务非阻塞2PC模型的实现与测试

在改进BTP 2PC with timeouts的timeout设定及相关时序的前提下，提出了一类面向细粒度事务终止特性的非阻塞扩展2PC模型（Tx2PCt）。提供了Tx2PCt事务处理模型于主要商业开发平台环境（Microsoft .Net）上的测试实例及分析。测试结果支持了Tx2PCt 事务协议的前提设定的合理性，印证了Tx2PCt在事务吞吐量方面的表现与预期相吻合。