一览众山小——试驾HONDA ST1300 Pan European

就是这辆世界顶级的重量级运动旅行车,伴我征服了无数条曲折山道之后,带我驶上燕山之巅。俯视着连绵的山脉在我与它的脚下,豪迈之情不尽油然而生,这种“一览众山小”的豪情,是我从事试车工作四年多以采无法忘怀的     

新一代“洋务运动”

由于特定的历史原因,中国曾一度缺失了与世界共享科技飞跃的黄金时期。由此造成了中西方在科技与观念上的落差。敏锐者洞察到了这点,便引导了“洋务运动”的兴起。尽管最终以失败告终,却使“师夷长技以治夷”的思想深入人心。直到今天,洋务运动仍在各种行业中进行着。一次成功的“洋务运动”,必须走完三个阶段,首先是购买拥有,其后是学习提高,最终融汇贯通。将其投影到A1GP里,处于“发展中车队”的A1中国队就是一个很好的例子。从将汽车世界杯引入中国的第一步,到开始整合国际化精英团队的第二步,新一代“洋务运动”已经悄悄打响。     

英国皇家海军和海军工业

1 英国皇家海军 1981年,出台厂臭名昭著的John Nott评论,英国国防部的某些官员提出取消两栖作战部队,并卖掉—艘“无敌”级航母,将前线的军事力量减至十二艘核攻击潜艇。 这个“总体规划”由于福克兰群岛战争的爆发而中止,但这危险刚一过去,这些政府官员又提出要继续实施上述规划。     

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...     

四分之一比例改进的双层壳体设计的有限元分析

单向加筋以层壳体水面舰船的改进设计由于经济、军事、民用和环境的考虑而得到发展，主要考虑方面包括经济上的可生产性、减少特征、提高生存能力和抗浅破坏能力。需要解决的问题包括验证结构分析的可能性、证实破损机理和评定结构的完整性。     

基于对称测量方程的多目标跟踪

就测量是目标位置的对称函数而论,本文介绍了多目标跟踪中航迹保持的一种新方法。在这一方法里,数据相关问题被嵌入目标状态估计过程中,所以没有必要考虑潜在目标/测量相关。对于三维空问中的N个运动目标,其目标状态估计的一阶模型是一个扩充的6N维卡尔曼滤波(器)。在本文中,注意的焦点在假定(一个给定座标系中)测量数(目)等于目标数(目)的等速目标情形。     

对船舶操纵性标准的急迫需求——休斯敦水道实船操纵性试航的经验

我认为,造船师和轮机师考虑海上环境设计的船舶,它们99.9%的时间在海上渡过。但他们忘了,这些船舶还必须进入河道装卸货物。当某件引起公众高度关注的事故发生,船舶建造者或许会进入公众视线,发现他们犯有疏忽罪,要为建造了动力不足和操纵不良的船舶负责。一位引航员的观点国际     

采用微气泡缩减高速船拖曳阻力(英文)

Ship hull form of the underwater area strongly influences the resistance of the ship.The major factor in ship resistance is skin friction resistance.Bulbous bows,polymer paint,water repellent paint(highly water-repellent wall),air injection,and specific roughness have been used by researchers as an attempt to obtain the resistance reduction and operation efficiency of ships.Micro-bubble injection is a promising technique for lowering frictional resistance.The injected air bubbles are supposed to somehow modify the energy inside the turbulent boundary layer and thereby lower the skin friction.The purpose of this study was to identify the effect of injected micro bubbles on a navy fast patrol boat(FPB) 57 m type model with the following main dimensions:L=2 450 mm,B=400 mm,and T=190 mm.The influence of the location of micro bubble injection and bubble velocity was also investigated.The ship model was pulled by an electric motor whose speed could be varied and adjusted.The ship model resistance was precisely measured by a load cell transducer.Comparison of ship resistance with and without micro-bubble injection was shown on a graph as a function of the drag coefficient and Froude number.It was shown that micro bubble injection behind the mid-ship is the best location to achieve the most effective drag reduction,and the drag reduction caused by the micro-bubbles can reach 6%-9%.     

机车修理工作中的新技术

近来开发了一些机车或司乘人员的诊断系统。文内介绍了在谢尔巴科夫展览会展出的几种机车修理中使用的诊断设备，简要地了这些诊断设备的用途、工作原理、外形尺雨和外形归咎。