深层搅拌桩在软基处理中的应用

通过对成都铁路局北编组站软基加固处理实例,结合水泥深层搅拌桩的加固机理,对水泥深层搅拌桩在软土地基、特别是成都平原地区的软土地基的加固应用提出一些看法。     

Establishment of Model for Tire Steady State Cornering Properties using Experimental Modal Parameters

Modeling of tire cornering properties using experimental modal parameters is studied. With tire lateral experimental modal parameters, the distribution of side force and lateral deformation under total adhesive and sliding conditions are obtained. Side force, self-aligning, cornering stiffness and relaxation length under different loads and friction coefficients are also calculated. The calculated results are in correspondence to experimental results in the references qualitatively. The non-dimensional side force obtained from the calculated results is compared with the Fiala model, its modified expression by experiments and also the widely used empirical Magic Formula model. The calculated results tally well with the fitted results obtained using Magic Formula model. It can be seen that the tire steady state cornering model using experimental modal parameters proposed in this paper is better for an in-depth study of tire natural characteristics, and the labored experimental work can be avoided.     

电子计算机售票系统维护经验

1 电话费固定(专线)或不考虑电话费支出的电脑售票代售点,电脑取票后,不立即售出,挂在电脑售票屏幕上,不立刻打票等待旅客前来购票时才打票——即所谓的电脑屏幕扣票。如何解决? 答:这种现象有诸多不利,一是大家都挂票的话,造成公共网上票不流通;二是若开车了还没旅客前来购票,此时释放后造成票浪费;三是造成主机开销大。目前的smart2.0版不控制挂票时间,有待新版来解决     

46500t化学品船研制开发

本文简要描述了广船国际化学品船开发的现状，具体介绍了46500t化学品船的技术特点及优势。     

公路长隧道纵向通风的数值模拟

采用有限元法求妥二维定常不可压缩Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程的方法,进行隧道射流通风和具有射流调压的竖井吸出式通风系统的空气动力学特性数值研究,给出在不同工况条件下,实际隧道中风速的分布特征。数值解和试验结果进行比较,证明数值解是有效和可靠的。     

合江长江一桥拱座大体积砼温度裂缝控制研究

大体积混凝土施工中的温度监控是预防裂缝产生的关键。文章以合江长江一桥拱座混凝土施工为例，介绍了优化混凝土的配合比、合理分层浇筑混凝土及采用水管冷却混凝土三种温度控制方法。     

Container port systems in China and the USA: a comparative study

This study compares the evolution of container port systems in China and the USA in terms of port throughput, number of container ports and the concentration level in the container port system, based on the time-series data on these three features over the period 1979–2009 for China and 1970–2009 for the USA. The results show that the densities of container ports in the two countries are similar, and their evolutionary processes are alike, which has led to a comparable market structure in the port industries of the two countries. In addition, the disparities between container ports closely represent the unevenness in the regional economic development. We further compare the port management regimes of the two countries in terms of the administrative processes for port development and expansion, the ownership structure and the providers of port functions, which offer some explanation on the dynamics of port evolution in the two countries. In conclusion, it can be seen that the evolution of the container port system and the management regime in the USA can be a de facto reference for the future development of the Chinese container port system.     

Maritime legislation: new areas for safety of life at sea

This study reveals areas where IMO regulations of safety of life at sea can be improved upon. After examination of 5389 mortality and 3559 accident cases of UK seamen and 6878 fatalities of worldwide seamen, it finds fatalities due to personal accidents on board ship constitute ～90% of all mortality cases. Therefore, prevention of personal accidents should be given a higher priority. It reveals also that accidents involving coastal (domestic) ferries were another concern in the safety of life in shipping, e.g. in 1996 alone more than 2562 fatalities occurred in this sector. As a case study, the nationalities of 364 deceased seamen in bulk carrier disasters (1990–1998) are identified. Fatalities to British and worldwide seamen are based on the data obtained from various sources. However, fatalities to seamen working on board open registry ships are the best estimation, based on the information available to the authors.     

物联网技术对港口生产力的影响

为提高我国港口的竞争力,从港口管理的角度出发分析物联网的关键技术和工作原理,从生产力角度对物联网技术在我国港口生产管理领域的应用现状进行评析,并根据生产关系的转变,提出物联网在我国港口生产管理领域的发展方向和推广方案,最后,从物联网技术对港口生产业务流程的影响出发,分析由此引发的生产关系的转变和生产力的发展。     

船舶承运人加强货运质量管理的措施

船舶承运人为提高在客户中的信誉,增强企业在国际航运市场上的竞争能力,在承运过程中应尽量防止货损货差事故的发生。文章着重介绍了船舶承运人在货运质量管理当中应采取的各种措施,以此为货主提供安全、优质的运输服务,从而达到双赢的目的。