川江及三峡库区变吃水干散货船的优化论证

川江及三峡库区航道水深季节性变化大,为了充分利用水深条件,船舶多采用变吃水设计,船舶航行时载况的变化会引起主机、螺旋桨的工况发生变化,因而船舶营运经济性的计算有别于常规船舶,对船舶营运经济计算中载货量、航速及经济参数进行分析,实例计算结果令人满意。     

合(肥)裕(溪口)航道整治工程--裕溪船闸公路桥改造工程设计

考虑合(肥)裕(溪口)航道整治裕溪船闸公路桥改造工程既受长江大堤、裕溪节制闸,船闸等建筑物的限制,又须满足船闸的营运要求,文章介绍了该公路桥的方案设计,桥梁结构设计及施工工艺。     

城市轨道交通预制箱梁设计概算编制

以北京市和广州市轨道交通工程为例，详细介绍了大吨位整孔预制箱梁预制和架设的概算编制方法，指出机械地套用地方市政定额是不科学和不切实际的，应根据工程的具体工艺工法借用铁路工程定额，达到合理确定工程造价的目的。     

2万吨级多用途船船型试验研究

对2万吨级多用途船船型进行了试验研究，该船与相近吨位船舶相比，傅氏数高，方型系数大，船型优化设计有一定的难度，在吸收国内外先进经验，分析上海船研所同类型多用途船船型研究资料的基础上，先后设计了2个方案的球艏线型，通过试验分析比较，优选出推荐船型。优选船型有效地解决了该船的快速性问题，性能优良，可供船舶设计及建造部门使用。     

MZ32型移动模架造桥机在秦沈客运专线的应用

秦沈客运专线小凌河特大桥主河槽 3 2m双线预应力混凝土箱梁施工采用中铁大桥局自行研制的MZ3 2型移动模架造桥机原位整孔现浇的方案 ,在铁路桥梁施工中尚属首次。简要介绍该造桥机的构造、原理、施工工艺     

铁路客票营销分析系统的研究

随着铁路客票系统的建成及全国联网售票的实现,铁路客运业务管理逐步走向规范化、制度化、科学化。建立铁路客票营销分析系统是一项新的重要任务,作者对有关问题进行了探讨,研究了系统建设的整体框架和数据组织原则,论述了数据采集,数据优化和数据展现的技术实现方案。     

SS7型客货运电力机车 3：总体布置及通风系统

介绍了Ｂ０－Ｂ０－Ｂ０轴式的ＳＳ７型电力机车的总体布置和通风系统，并给出设备设置和通风系统示意图。     

应用蒙特卡罗方法优化任务包的作业安排

在现代造船模式下，合理地安排众多的任务包的生产，满足资源限制要求，并做到资源利用的均衡，是生产计划的基本要求。面对复杂的造船生产，仅靠计划制订者个人的经验很难制订出合理的生产计划。通过引进蒙特卡罗方法，实现计划制订、计划平衡及计划调整的计算机处理。以一分段生产的计划安排为例，在保证分段建造周期及在资源限制条件下，应用蒙特卡罗方法确定较优的任务包作业顺序。通过计算结果分析，证明该方法可行。     

Development of a hull form definition tool with a related knowledge-based advisory system

The development of a parametric hull form design system utilizing combined knowledge-based and objectoriented methodologies, approaches, and techniques is the major purpose of this research. One objective was the development of a powerful, intuitive, and parameter-based hull definition system with a related hull definition advisory system that would provide useful and necessary advice to the user. Object and knowledge modeling activities were conducted during the analysis and design stage to facilitate the implementation of a hull design program and advisory system. The hull design system includes the generation of a geometric model from a process of aggregating simple user-selected shapes representing different boundaries. Design involves the capability to vary simple parameters such as entrance angles, length-breadth ratios, and radii to define local and general surface geometries. Hydrostatic calculations are included for analysis; results are referred to an advisory system for evaluation and the determination of the acceptability of parameters and analysis results. The advisory system includes a knowledge bases consisting of hull form databases, results of the statistical analysis of data, design parameter constraints, and expert knowledge acquired from designers, reference materials, and technical reports. Use of the design tool with the advisory system results in the rapid generation of hull forms and associated design evaluations. Flexibility in decision making results from the separation of the design system from the advisory system. The independence of the two systems allows for a wide range of user experience with experts using the design tool with minimal reference to the advisory system. On the other hand, the expertise and knowledge stored in the advisory system is fully available to inexperienced designers and users.