NK颁发世界首个原油油轮货油舱耐蚀钢型式认可证书

日本船级社（NK）日前对Nippon钢厂生产的NSGP－1号钢颁布了世界首个原油油轮货油舱耐蚀钢型式认可证书。这种专门针对适应原油油轮货油舱内侧底部使用的新型钢材而颁布的认可证书符合IMO耐蚀钢的最新执行标准。     

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.     

Experimental Investigation of TARMAX Model for Modeling of Hydrodynamic Forces on Cylinder-like Structures

A new approach that models lift and drag hydrodynamic force signals operating over cylindrical structures was developed and validated. This approach is based on stochastic auto regressive moving average with exogenous (ARMAX) input and its time-varying form, TARMAX. Model structure selection and parameter estimation were discussed while considering the validation stage. In this paper, the cylindrical structure was considered as a dynamic system with an incoming water wave and resulting forces as the input a...     

水平对置柴油机的开发

水平对置发动机具备较高的动力性能,同时在配装车辆后,还能使车内空间更为舒适宽敞,同时,柴油机因排放二氧化碳更少而广受关注。为此,日本富士重工开发了配装量产乘用车的水平对置柴油机。该款发动机不仅具备优异的动力输出性能和响应性,而且在低噪声、低振动和低燃油耗方面都获得了不错的成绩。同时,由于配装了带氧化催化器和柴油颗粒滤清器的排气后处理装置及废气再循环冷却器,新发动机的排放水平达到了欧4标准。     

北京援助新疆10辆BRT公交车亮相边城

9月18日,10辆来自北京的大容量公交车亮相边城乌鲁术齐。当天,承载着北京人民的深情厚谊．10辆BRT公交车正式上线运营．支援乌鲁木齐客流骤增的BRTI号线公交运力。     

市学习贯彻党的十七届六中全会精神宣讲启动仪式暨首场报告会在石家庄公交举行

11月15日,石家庄市学习贯彻党的十七届六中全会精神宣讲启动仪式暨首场报告会在我公司举行。市委常委、宣传部长孙万勇,市国资委党委书记、主任毕拉祥,国资委副书记赵康彪及市委宣讲团全体成员、国资委系统部分企业的领导和总公司领导班子、中层以上干部、基层路队刚书记共计200余人参加了启动仪式。张玉锁总经理主持了肩动仪式。     

宾夕法尼亚铁路的百年成长历程

古老的宾夕法尼亚铁路已为人们服务近百年。百年之后的今天,规划者已为宾夕法尼亚铁路的下个一百年做好了规划。     

谁来打败红牛 F1大奖赛2011赛季前三站总结

三战比赛之后,红牛已经收获了2个分站冠军,1个分站亚军和1个分站季军,这样的成绩让很多车队已经开始绝望了。F1中国站的比赛后,马克·韦伯在接受采访时说出了很多车手的心声:"在某种程度上讲看到迈凯轮夺冠自然很遗憾,但是我们也不想维特尔一人跑太远。我认为,今天对于F1这项运动是有利的。"而对于其他车队而言,韦伯的话颇有得了便宜卖乖的嫌