车辆自动定位导航系统

ＧＰＳ接收机与电子地图配合使用在汽车上，中使驾车人时刻知道自己所处的位置。     

危险品运输的安全决策

危险品通常来源于消费品或工业副产品,包括易燃、易爆、有毒、易氧化、传染性、放射性和具腐蚀性的物品等。在世界范围内,每年产生的危险品约在40亿吨左右,这些物质在储藏和运输时,存在着巨大的潜在危险性,一旦发生事故,将造成严重后果。从事故的影响程度来看,由于危险品的储藏位置比较固定且一般远离人们生活区,事故造成的后果严重性程度相对较小。而对于危险品在运输中发生的如火灾、爆炸、泄露、中毒、污染等事故将是跨地区、跨行业的,而且由于设备的大型化,一旦事故发生都将产生灾难性的影响,给人员、社会、环境造成严重危害。因此,人们…     

福莱尔轿车变速器故障一例

前不久一辆福莱尔轿车变速器手操纵杆只能在空档位置摆动，挂不进任何档位，强行搬手操纵杆能听到较重的摩擦声。     

舰船环形区域配电结构及可靠性分析

舰船电网形式的选择直接关系到电力系统供电的可靠性，其重要性不亚于电站。本文首先对舰船电网形式进行了分析研究，然后利用基于可靠性框图的网络分析法，对几种典型的船舶电网进行了可靠性计算，通过对四种船舶电网的对比分析，得到环形区域配电的可靠性水平高于辐射网结构和电源环形网结构，是舰船电网结构发展的方向。     

Research on probability distribution of port cargo throughput

In order to more accurately examine developing trends in gross cargo throughput, we have modeled the probability distribution of cargo throughput. Gross cargo throughput is determined by the time spent by cargo ships in the port and the operating efficiency of handling equipment. Gross cargo throughput is the sum of all compound variables determining each aspect of cargo throughput for every cargo ship arriving at the port. Probability distribution was determined using the Wald equation. The results show that the variability of gross cargo throughput primarily depends on the different times required by different cargo ships arriving at the port. This model overcomes the shortcoming of previous models： inability to accurately determine the probability of a specific value of future gross cargo throughput. Our proposed model of cargo throughput depends on the relationship between time required by a cargo ship arriving at the port and the operational capacity of handling equipment at the port. At the same time, key factors affecting gross cargo throughput are analyzed. In order to test the efficiency of the model, the cargo volume of a port in Shandong Province was used as an example. In the case study the actual results matched our theoretical analysis.     

大宽度吃水比干支直达汽车运输船型研究

本文提出了一种大宽度吃水比干支直达汽车运输新船型。试验结果表明,这是一种很好的内河汽车运输船型,具有良好的经济效益,并已被郧阳地区交通局作为汽车运输船型采用。     

乙氨芴酮对大鼠实验性矽肺的疗效观察

矽肺发病机制至今仍在探讨中,Hahon和Echerts发现矿物粉尘影响细胞的完整性和干扰素系统的功能。某些矿尘对组织培养中单层细胞在病毒影响下产生的干扰素起抑制作用。Hahon     

柴油机摩擦功率影响因素的试验研究

本文阐述了转速、润滑油温度,增压压力和压缩比等因素对柴油机摩擦功率的影响程度,分析了Nm、Pm与n三者之间的实值关系,给出了相应的试验结果和用回归法求得的关系式。文中对有关问题还作了物理上的解释。