汽车综合性能检测的量值溯源

详细阐述了汽车综合性能检测的量值溯源。     

Democratic group signatures with linkability from gap Diffie-Hellman group

Democratic group signatures(DGSs) attract many researchers due to their appealing properties, i.e., anonymity, traceability and no group manager.Security results of existing work are based on decisional Diffie-Hellman(DDH) assumption.In this paper, we present a democratic group signature scheme based on any gap Diffie-Hellman(GDH) group where DDH problem is easily but computational Diffie-Hellman(CDH) problem is hard to be solved.Besides the properties of ordinary DGSs, our scheme also provides the property of linkability, i.e., any public verifier can tell whether two group signatures are generated using the same private key.Security properties of our scheme employ a new and independently interesting decisional product Diffie-Hellman(DPDH) assumption which is weaker than DDH one.     

条码生产制造系统(MES)在铝合金车轮生产中的应用(1)

条码技术为生产制造执行系统(MES)提供了最佳数据采集手段。生产现场作业员使用条码阅读器或带有条码扫描功能的手持数据终端,进行现场数据采集,替代人工完成大量工作,使之能准确、及时地采集到过程信息,帮助企业极大地提高生产作业效率和管理水平。     

焊接质量追溯系统应用

对海工企业焊接质量追溯管理现状进行分析并指出其弊端,将企业微信平台与海工企业原焊接质量追溯流程相结合,在此基础上设计并开发集生产信息记录、共享、报表分析等多功能于一体的焊接质量追溯系统。通过实际应用,该系统实现焊接全过程质量信息和数据的追踪与管理。在信息化背景下,为企业进行焊接质量追溯提供有益参考。