DZ55冷拔地质钻探钢管的试制

采用４０ＭｎＶＢ合金结构钢管坯，严格控制生产中的温度制度和轧（拔）制工艺参数，可以生产出符合标准和用户要求的ＤＺ５５冷拔地质钻探无缝钢管。     

地铁列车客室车门故障的QC分析

根据上海轨道交通AC01／02型地铁列车客室车门的故障实际情况，运用质量控制(QC)的理论和分析方法，分析了导致客室车门故障的主要因素，并制定了有效的解决措施，取得了显著的经济效益。     

军用软件测试文档生成设计与实现

软件测试是软件研发过程中非常重要的环节,是保证软件质量,提高软件可靠性的重要手,使用HP公司的测试管理工具Quality Center(以下简称QC),在测试过程中对测试用例和测试缺陷进行有效管理,确保了测试资产的积累和重用,为了使其应用更加适应军用软件的测试过程,针对QC软件进行二次开发,实现可自动化生成符合军用软件测试要求的测试文档.在二次开发过程中,追求以用为主的指导技术路线,使测试过程管理、测试产品管理和测试人员管理更加符合我们的实际工作,使测试工作的效率显著提升,起到事半功倍的效果.     

FPGA implementation of highly secure,hardware‐efficient QC‐LDPC code–based nonlinear cryptosystem for wireless sensor networks

This paper presents the design and implementation of an integrated architecture for embedding security into quasi‐cyclic (QC) low‐density parity‐check (LDPC) code–based cryptographic system through a nonlinear function of low hardware complexity. Instead of using standard S ‐boxes for implementation of nonlinear function, this paper considers a method on the basis of maximum length cellular automata (CA), so that enhanced security can be achieved with simple hardware structure. The proposed system adopts a lightweight random bit stream generator on the basis of linear feedback shift register (LFSR) for generating random error vectors, so that a large number of vectors with very good cryptographic properties can be made available with low hardware cost. Different permutation patterns generated for different message blocks help to provide good degrees of freedom for tuning security with reasonable key size. The hardware architecture for the proposed system is developed and validated through implementation on Xilinx Spartan 3S500E. Analytical and synthesis results show that the proposed scheme is lightweight and offers very high security through continuously changing parameters, thus making it highly suitable for resource‐constrained applications.     

时间窗下单船岸桥调度——基于数学规划和规则的启发式算法

在考虑任务属性中的任务优先顺序和不可同时执行要求,岸桥属性中的岸桥时间窗、转移时间、初始位置、安全距离和装卸速度等因素下,以单艘船舶的最短岸桥作业时间为目标函数,建立单艘船舶岸桥调度的混合整数线性模型P1。计算数据采集于宁波某集装箱港口,通过简化模型P2求解岸桥调度模型P1的下限边界值和排程数据,在此基础上,运用基于规则的启发式算法求解模型P1的岸桥调度时序表。计算结果表示本组合算法能较好地得到满意解,而且比较符合港口实际。     

26t/26t-30m电磁盘起重机制造

介绍了太重集团与德国DSD公司合作生产的为“宝钢宽厚板项目”提供的26t／26t-30m电磁盘起重机及其钢结构制造的一些新特点、QA／QC文件、工艺设计的转化。     

施工企业进一步加强全面质量管理的思考

本文对目前施工企业全面质量管理存在的问题进行了剖析，阐述了自己的观点。     

基于QC法的印刷品质量控制研究

为了提高印刷品质量,提出将QC法应用于印刷流程的新思路。研究表明,印刷流程中引入QC法不仅可行,而且能直观、准确、及时地发现印制过程中存在的问题并找到解决办法,使印刷品质量得到控制和提高。     

运用QC方法确保植筋质量

结合春天商业广场的工程概况，介绍了QC小组的活动制度及选题，并对PDCA循环的现状做了分析，总结了影响植筋质量的主要因素，并制定了相应对策，通过QC活动，取得了良好的效益。     

Tribological and Corrosion Behavior of Vacuum Plasma Sprayed Ti-Zr-Ni Quasicrystalline Coatings

This investigation deals with a study of the friction, wear, and corrosion behavior of vacuum plasma sprayed quasicrystalline (QC) Ti_41.5Zr_41.5Ni₁₇ coatings. During pin on disc experiments, a change in the mode of wear has been found to occur with corresponding changes in normal load and sliding velocity. The low thermal conductivity of quasicrystals and its brittleness play a vital role in determining the friction and wear behavior of such materials. When these coatings are subjected to rubbing for a longer period of time, wear occurs by subsurface crack propagation, and subsequent delamination within the coated layer. By comparing the QC to its polycrystalline counterpart during potentiodynamic measurements according to ASTM G 31, higher currents were found over the whole range of potentials for QC when immersed in 1 M HCl solution. This article is an invited paper selected from presentations at the 2007 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Global Coating Solutions, Proceedings of the 2007 International Thermal Spray Conference, Beijing, China, May 14-16, 2007, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2007.