南京鼓楼地下立交工程建设的若干问题

介绍了南京鼓楼地下立体交通工程的特点，工程建设管理经验，以及基于工期效应而产生的不良后果。最后总结了该工程建设的经验教训。     

Thermal placement optimization of multichip modules using a sequential metamodeling-based optimization approach

The study attempts to seek the optimal thermal design of planar multichip module (MCMs) under natural convection through optimal chip placement design. To attain the goal, a sequential metamodeling-based optimization approach is introduced. This approach incorporates a response surface methodology (RSM)-based design of experiment (DOE), three-dimensional (3D) thermal finite element analysis (FEA) and an updating scheme. Essentially, the RSM is used to construct, via quadratic polynomial approximation, the global RS of the chip junction temperature in terms of design variables. For speeding up the DOE and the solution of the optimization, several dynamic experimental design strategies using move limits and different proposed sampling techniques are introduced. The feasibility of the strategies is demonstrated, and their solution accuracy and efficiency are also compared with each other. By the explicit RS-based performance function together with geometry constraints, a constrained thermal optimization subproblem is formed. The optimum of the subspace optimization is sought, which is considered as the nominal starting point of next iteration. The iterative process continues with a new defined design subspace and factorial design plan until convergence is attained. The applicability of the proposed design optimization technique is demonstrated through several design case studies involving various planar MCMs.     

低场核磁共振技术在水泥基材料研究中的应用及展望

阐述了低场核磁共振技术在水泥基材料研究中的应用现状,认为现有的研究主要集中于水泥水化进程和水在硬化浆体中的扩散特征,也包括对硬化水泥浆体孔结构和比表面积的测试。分析了低场核磁共振技术在实际应用中面临的挑战,展望了该技术在新拌水泥浆体结构性能研究中的应用前景。     

深圳市福田交通综合枢纽换乘中心双向预应力张弦梁结构施工

介绍双向预应力张弦梁结构的施工过程。根据有限元分析软件MIDAS的施工阶段分析结果,控制每个阶段的结构位移量,以实现最终的建筑形态,结合现场试验段的实际测量位移值,修正各施工阶段的预应力值,指导后续单元的施工。     

外墙带副框铝合金窗防水技术

外墙带副框铝合金窗周圈渗漏水现象较常见,在窗口两侧使用1.5 mm厚SAM-920自粘卷材防水,将整个副框包贴,配以其他细部处理措施,可以取得良好的应用效果.     

大型地下商业建筑防火分隔方案优化

以某大型地下商业建筑为例,从安全疏散时间、阻烟效率、分隔物可靠性和经济性分析等方面对其6种防火分隔方案进行分析评价,并应用消防价值工程法优选出最佳防火分隔方案.结果表明,采用消防价值工程法能将防火分隔方案的功能与工程成本相结合,有助于防火设计过程中设计方案的选择优化.     

NEW APPROACH TO ELECTROMAGNETIC SCATTERING FROM A CONDUCTIVE DISC-RING STRUCTURE

A one-dimensional modified integral equation for electromagnetic scattering from a metallic concentric disc-ring structure is derived by using Fourier expansion and separating the contribution of charge density from conventional EFIE. In the case of normal incidence, the derived equation is very simple and easy to be solved numerically regardless of the electric dimension of the structure. The comparison between the data of RCS of a disc by using this method and analytical method shows the effectiveness of this approach. Numerical results are also given for current distributions and the scattered fields for a disc-ring structure.     

用于变压器的特种无励磁分接开关研发

介绍了几种特殊无励磁分接开关的结构、研发特点及原理。     

室内光环境节能优化控制研究

目前室内光环境控制大多侧重于室内灯光的智能化控制,但单纯从照明的能量消耗角度来考虑,最大化利用自然光照是最节能的.针对这一问题,提出了一种基于自然光和人工照明结合控制的室内先环境模糊控制方法,合理分配了自然光与人工光照的比例,最大限度满足节能要求的同时,又能为人们的工作、学习、生活提供良好的室内环境.实验结果表明,该控制方案不仅可以最大限度满足用户对日光的需求和舒适度,更比传统照明方式节约了大约30%的能耗.     

化学试剂数据库设计和检索过程中针对别名的解决方案

国内已有多个化学试剂信息网建立了自己的化学试剂数据库,但这些数据库建立时都遇到了"别名"的问题.就"上海试剂资源共享服务协作网"建设过程中,针对化学试剂数据库检索中的别名问题提出了解决方案.