This study compares the test results of the FAST (Fabric Assurance by Simple Testing) with those of the KES - F (Kawabata Evaluation Systems for Fabrics) for a range of nineteen light weight wool and wool blend fabric...This study compares the test results of the FAST (Fabric Assurance by Simple Testing) with those of the KES - F (Kawabata Evaluation Systems for Fabrics) for a range of nineteen light weight wool and wool blend fabrics in terms of the low - stress mechanical properties of bending, shear, and tensile deformation. It is found that there are very significant correlations between the corresponding parameters for extensibility and shear rigidity obtained from the test results of the two systems. The correlation between the values of bending rigidity obtained from the two systems is only moderate. Furthermore, for the fabrics tested in this study, the values of bending rigidity, shear rigidity, and extensibility measured using the KES - F instruments are higher than those of the corresponding parameters measured using the FAST instruments. The linear regression equation is given for each pair of corresponding parameter.展开更多
如何提高嵌入式软件产品的测试效率,提高软件质量,已经成为当下重要的研究课题,而目前出现的典型开源测试框架主要针对通用嵌入式软件产品或者通用web领域软件产品,并不能满足轻量级操作系统资源受限的特定需求(例如内存占用少、节能效...如何提高嵌入式软件产品的测试效率,提高软件质量,已经成为当下重要的研究课题,而目前出现的典型开源测试框架主要针对通用嵌入式软件产品或者通用web领域软件产品,并不能满足轻量级操作系统资源受限的特定需求(例如内存占用少、节能效率高);针对这种状况设计并实现一种称为ACore Lite Test轻量级测试框架,并以轻量级操作系统内核中的计数信号量模块为例,说明了测试框架的使用方法,并对其设计和实现的正确性进行了验证。展开更多
IDP(Integrated Data Platform,综合数据业务平台)是开放的、模块化的、基于标准的基础平台,为移动运营商提供了连接底层各种基础服务以及连接上层各种业务的通用平台。基于JBoss的IDP2.0系统在应用过程中,遇到了占用资源多,性能差,维...IDP(Integrated Data Platform,综合数据业务平台)是开放的、模块化的、基于标准的基础平台,为移动运营商提供了连接底层各种基础服务以及连接上层各种业务的通用平台。基于JBoss的IDP2.0系统在应用过程中,遇到了占用资源多,性能差,维护成本高等问题。为了解决上述问题,介绍了一种IDP轻量级业务框架的总体设计方案,并重点介绍了业务逻辑模块DSP(Data-service Script Processor,数据业务脚本处理器)的设计。该框架具有高性能,易于维护,便于快速开发业务逻辑等优点。展开更多
This paper focuses on an estimation of light weighting opportunities for the frame structure of com- mercial road vehicles. This estimation is based on simpli- fied static load cases which play a predominant role for ...This paper focuses on an estimation of light weighting opportunities for the frame structure of com- mercial road vehicles. This estimation is based on simpli- fied static load cases which play a predominant role for the dimensioning of a frame structure and therefore these simplifications are not putting the general validity of the conclusions into question. A comparison of different ma- terials under this scenario shows that light metals do not show any weight reduction advantage in comparison to steel while a material-independent topology optimization has more weight reduction potential for the frame structure than a simple change of materials. Considering the con- straints of part complexity which is directly linked with production and assembly cost, the ladder frame structure has become the current state of the art design. Thus the paper also puts a spotlight on basic rules of node design and vertical load induction in order to keep the weight of such a design as low as possible. Practical examples from manufacturers show that the weight of a commercial vehicle could be reduced by 10%, and main parts of the frame structure could be reduced by 30% using high strength steel in combination with innovative production methods like roll forming.展开更多
基金This project was generously funded by International Wool Secretariat
文摘This study compares the test results of the FAST (Fabric Assurance by Simple Testing) with those of the KES - F (Kawabata Evaluation Systems for Fabrics) for a range of nineteen light weight wool and wool blend fabrics in terms of the low - stress mechanical properties of bending, shear, and tensile deformation. It is found that there are very significant correlations between the corresponding parameters for extensibility and shear rigidity obtained from the test results of the two systems. The correlation between the values of bending rigidity obtained from the two systems is only moderate. Furthermore, for the fabrics tested in this study, the values of bending rigidity, shear rigidity, and extensibility measured using the KES - F instruments are higher than those of the corresponding parameters measured using the FAST instruments. The linear regression equation is given for each pair of corresponding parameter.
文摘如何提高嵌入式软件产品的测试效率,提高软件质量,已经成为当下重要的研究课题,而目前出现的典型开源测试框架主要针对通用嵌入式软件产品或者通用web领域软件产品,并不能满足轻量级操作系统资源受限的特定需求(例如内存占用少、节能效率高);针对这种状况设计并实现一种称为ACore Lite Test轻量级测试框架,并以轻量级操作系统内核中的计数信号量模块为例,说明了测试框架的使用方法,并对其设计和实现的正确性进行了验证。
文摘IDP(Integrated Data Platform,综合数据业务平台)是开放的、模块化的、基于标准的基础平台,为移动运营商提供了连接底层各种基础服务以及连接上层各种业务的通用平台。基于JBoss的IDP2.0系统在应用过程中,遇到了占用资源多,性能差,维护成本高等问题。为了解决上述问题,介绍了一种IDP轻量级业务框架的总体设计方案,并重点介绍了业务逻辑模块DSP(Data-service Script Processor,数据业务脚本处理器)的设计。该框架具有高性能,易于维护,便于快速开发业务逻辑等优点。
文摘This paper focuses on an estimation of light weighting opportunities for the frame structure of com- mercial road vehicles. This estimation is based on simpli- fied static load cases which play a predominant role for the dimensioning of a frame structure and therefore these simplifications are not putting the general validity of the conclusions into question. A comparison of different ma- terials under this scenario shows that light metals do not show any weight reduction advantage in comparison to steel while a material-independent topology optimization has more weight reduction potential for the frame structure than a simple change of materials. Considering the con- straints of part complexity which is directly linked with production and assembly cost, the ladder frame structure has become the current state of the art design. Thus the paper also puts a spotlight on basic rules of node design and vertical load induction in order to keep the weight of such a design as low as possible. Practical examples from manufacturers show that the weight of a commercial vehicle could be reduced by 10%, and main parts of the frame structure could be reduced by 30% using high strength steel in combination with innovative production methods like roll forming.
