西门子公司为越南制造的“亚洲飞人”号（AR15VR／D20E型）内燃机车

介绍西门子公司为越南制造的"亚洲飞人"号(AR15VR/D20E型)内燃机车的主要参数、总体结构、主要部件和系统的设计特点。     

支持发动机开发的智能滑动轴承

采用智能滑动轴承,可以在运行期间监测高负荷组件的磨损状态。Miba公司开发了自带电源的新型轴承传感器,以此对在工作状态下的发动机轴承状况进行监测,从而降低维护成本和排放。     

俄罗斯真空造型工艺的发展

经过对真空膜造型(V法造型)技术30多年的探索,铸造专家们研究了该工艺的参数及其对钢铁和黑色金属合金铸件的影响。设计制造了设备样机。并在此基础上建立了铸造厂。通过实践,掌握了生产铸件和陶瓷、聚合物混凝土和石膏产品的工艺。根据俄罗斯和独联体国家的现状和原材料供应情况,制定了真空膜造型工艺及设备的设计和工艺文件。     

Deutz公司满足第4i阶段排放标准的新型柴油机（第2部分）——性能与排放

Deutz公司新一代柴油机面临日趋严格的废气排放法规挑战。介绍130kW以上功率档的柴油机运行性能和排放性能，以及为达到这一性能所采取的技术措施。考虑到了农用机械和工程机械等不同应用领域的特殊要求。     

兰台人叙兰台事

年华似水流,转眼春风柔!匆忙间本人从事档案工作已近30年,真切地见证了我所档案工作从小到大、从弱到强,档案文件的库存量不断完善、不断丰富的过程。面对一排排的档案文件资料,这里不仅仅聚集着广大科技人员、科研管理人员的心血结晶,也反映了档案管理人员对他们所从事的档案事业及档案成果的光荣写实,是未加修饰、最原始、最客观与最真实的历史记录与历史折射。     

两种直接波浪能转换系统性能的比较:阿基米德波浪摆和波能浮筒(英文)

Many wave energy conversion devices have not been well received. The main reasons are that they are too complicated and not economical. However, in the last two decades direct conversion systems have drawn the attention of researchers to their widely distributed energy source due to their simple structure and low cost. The most well-known direct conversion systems presently in use include the Archimedes Wave Swing (AWS) and Power Buoy (PB). In this paper, these two systems were simulated in the same conditions and their behaviors were studied in different wave conditions. In order to verify the simulations, results of the generator of the finite element computations were followed. An attempt was made to determine the merits and drawbacks of each method under different wave conditions by comparing the performance of the two systems. The wave conditions suitable for each system were specified.     

双通线加热的热力学及实验分析(英文)

The present investigation deals with process analysis of oxy-acetylene flame assisted double pass line heating for varying plate thickness. oxy-acetylene flame as the heat source for multi pass line heating to achieve 3-D bending of plates with varying thicknesses was studied. The oxy-acetylene flame was modeled as the moving heat source in the FEM analysis. The transient thermal histories were predicted taking into account the temperature dependent thermo-mechanical properties. A comparative study between single pass and double pass line heating residual deformation was also carried out. The temperature distribution and residual deformations predicted by the numerical model developed in the present work compared fairly well with those of the experimental ones.