基于AVR单片机的可燃气体报警系统设计

讨论了以AVR单片机为控制器的可燃气体报警系统的设计,并以MC系列可燃气体传感器为例具体分析了报警器的工作原理。实验证明该气体报警系统具有检测气体浓度响应速度快的特点。     

盐渍土机场毛细水迁移试验研究

通过室内模拟毛细水迁移试验,对盐渍土地区机场地基中不同压实度、不同含水量以及不同含盐量的毛细水上升进行了研究。结果表明,其含水量、含盐量、压实度不同,则毛细水上升速度、高度均有所差异。     

如何消除水泥混凝土的表面气泡

该文分析了水泥混凝土产生气泡的原因,同时从材料、工艺两方面进行了机理分析,并提出了解决措施。     

斜拉桥与其他桥型的协作研究

结合国内外代表性的工程实例,介绍斜拉桥同其他桥型协作的形式、特点和研究情况,包括斜拉桥同连续梁或刚构的协作、斜拉桥同拱桥的协作、斜拉桥同悬索桥的协作、斜拉桥同上承式索桥的协作等;对比不同协作体系的荷载分配方式,并根据各个基本结构体系承受的荷载有无明显几何界限,将桥型间的协作区分为共载协作和分载协作,其中分载协作体系结构长度比例的确定、连接部位的设计以及共载协作体系中刚度比例的优化对结构特性影响较大,是设计的关键.     

Multi-Step Model Predictive Control Based on Online Support Vector Regression Optimized by Multi-Agent Particle Swarm Optimization Algorithm

As optimization of parameters affects prediction accuracy and generalization ability of support vector regression (SVR) greatly and the predictive model often mismatches nonlinear system model predictive control, a multi-step model predictive control based on online SVR (OSVR) optimized by multi-agent particle swarm optimization algorithm (MAPSO) is put forward. By integrating the online learning ability of OSVR, the predictive model can self-correct and adapt to the dynamic changes in nonlinear process well.     

RTG发动机调速节能改造

为了能够既保留RTG作业灵活、效率高等优点,又能解决其高油耗、高污染的问题,各种节能改造方案陆续推出,包括油改电、发动机调速、飞轮储能、超级电容储能等。在众多的改造方案中,发动机调速节能方案因为具有节能效果好、改造施工简单、设备整体改动小、改造成本较低廉等优点,成为我公司RTG节能改造的首选。     

Multi-objective optimal approach for injection molding based on surrogate model and particle swarm optimization algorithm

An integrated optimization strategy based on Kriging model and multi-objective particle swarm optimization(PSO) algorithm was constructed.As a new surrogate model technology,Kriging model has better fitting precision for nonlinear problem.The Kriging model was adopted to replace computer aided engineering(CAE) simulation as fitness function of multi-objective PSO algorithm,and the computation cost can be reduced greatly.By introducing multi-objective handling mechanism of crowding distance and mutation oper...     

Strong key-insulated signature in the standard model

The only known construction of key-insulated signature (KIS) that can be proven secure in the standard model is based on the approach of using double signing. That is, the scheme requires two signatures: a signature with a master key and a signature with the signer’s secret key. This folklore construction method leads to an inefficient scheme. Therefore it is desirable to devise an efficient KIS scheme. We present the first scheme with such a construction. Our construction derives from some variations of the Waters’ signature scheme. It is computationally efficient and the signatures are short. The scheme is provably secure based on the difficulty of computational Diffie-Hellman (CDH) problem in the standard model.     

排水式沥青混凝土面层应用研究与总结

该文通过排水式沥青混凝土路面在"一纵三横"道路整治工程中的具体应用,对设计参数选择、拌和具体要求、摊铺施工要点、施工质量控制和评价内容等提出了具体数据和方法。     

浅谈EPC总承包管理模式在川杨河桥工程中的应用及相关探索

该文首先介绍了EPC总承包管理模式的优点及其在上海川杨河桥工程建设中的运用。接着,就如何发挥EPC总承包单位的积极性,监理单位如何适应EPC管理模式,以及完善法律法规等问题予以探索。