高速公路路基沉降影响因素分析及预测

对高速公路软土变形和沉降的特点和影响因素进行了理论分析,阐述了公路软土路基沉降预测的基本方法,并对高速公路软土地基处理方法进行介绍,对新演变的小桩法的实例分析结果对比,验证其应用的可行性.     

铁通数字集群共网的运营策略探讨

数字集群的发展是我国移动通信的新亮点，将弥补我国专用移动通信的空白。在简要介绍了数字集群系统及其在国内外的发展后，对数字集群共网的运营策略进行了探讨。     

我国铁路融资制度改革方向探讨

我国《中长期铁路网规划》的制定和实施，每年需要巨额的资金投入，传统的融资方式已经制约了铁路的又好又快发展。此文通过对我国铁路当前融资制度存在问题的剖析，提出了铁路融资制度改革的关键点在于铁路的分类建设和分类经营。以期通过改革当前的制度，实现铁路融资渠道的拓宽，广泛吸引民间资本，加快铁路建设的进程。     

哈尔滨铁路局旅客运输市场调查分析

针对铁路旅客运输中不同的旅行需求,哈尔滨铁路局对吸引区范围内铁路旅客市场进行客流调查、信息解读,对旅客用户群的特点和其他交通方式进行比对分析。根据铁路既有客运产品的调查分析,提出铁路客运市场营销策略和既有客运产品改进的建议。     

Simulation of the mean zero-up-crossing wave period using artificial neural networks trained with a simulated annealing algorithm

The aim of this work was to develop a predictive model to forecast the mean zero-up-crossing wave periods (T _z ) for 3-hourly sea states at a location in the Pacific using artificial neural networks (ANNs). Seven multilayer ANNs were trained with a simulated annealing algorithm. The output of each trained ANN was used to estimate each of the seven parameters of a new distribution called the hepta-parameter spline proposed for the conditional distribution of T _z , given some mean zero-up-crossing wave periods and significant wave heights. After estimating the parameters of the distribution, the model was used to simulate and predict future values of T _z . Forecasting a sea state and developing the joint distribution of sea state characteristics with the help of the simulated characteristics are also discussed in this article.     

沈阳北站无站台柱雨棚钢管桁架的制作与安装

介绍沈阳北站无站台柱雨棚及大跨度三维曲面钢管桁架的施工过程,以及“场外制作—铁路运输—站内安装”的制作、运输、安装主要施工方法和技术,同时介绍了超限运输和大跨度构件吊装方法。     

工业企业火灾和爆炸事故的预防

工业企业火灾、爆炸事故具有原因复杂、后果严重、事故突发、难以控制的特征，必须要采取消除和控制点火源、控制可燃物与助燃物的结合、防止燃烧释放有毒有害气体的扩散、防止反应失控型火灾爆炸事故、建立完善的消防灭火系统等对策，按照“预防为主，防消结合”的消防工作方针，依据《中华人民共和国消防法》，切实加强工业企业防火防爆及消防安全管理工作。     

Performance Design of an Exhaust Superheater for Waste Heat Recovery of Construction Equipment

Although fuel cost has been the largest portion of annual operating costs of construction equipment, it is possible to save the energy and reduce cost using fuel economy enhancement technology. In this study, an organic Rankine cycle is applied to an excavator in order to recover waste heat, reproduce it into electrical energy, and consequently reduce the fuel consumption by 10 %. A design process was carried out to develop an exhaust gas superheater that recovers the waste heat from exhaust gas through a composite-dimensional thermal flow analysis. A one-dimensional code was developed to perform a size design for the exhaust gas superheater. The ranges for the major design parameters were determined to satisfy the target of the heat recovery, as well as the pressure drop at both fluid sides. Performance analysis was done through onedimensional design code results, which were compared with three-dimensional CFD analysis. By utilizing a 3D commercial code, the arrangement of the tubes was selected and the working fluid pressure drop was reduced through a detailed layout design. The design procedure was verified by a performance evaluation of the prototype, which yielded only a 7 % tolerance in heat recovery.     

Research on the coefficient of sound absorption in turbid water

China’s coastal waters are turbid and the properties of the seabed are complex. This negatively impacts the performance of underwater detection equipment. The properties of sound absorption in turbid water are not well understood. In this paper, the coefficient of sound absorption in turbid water was measured by the reverberation technique. All work was done in a reverberation barrel made of seamless aluminum. First, pure water was poured into the reverberation barrel and its reverberation time measured. Next, various concentrations of turbid water were poured into the barrel and their reverberation time measured. After all data had been gathered, the coefficient of sound absorption in turbid water of different concentrations was calculated. From this we determined a law of sound absorption in turbid water as summarized in the paper.     

使用PHOTOSHOP进行卫星影像光谱增强的方法和优势

利用TM、SPOT、ALOS卫星数据制作不同比例尺真彩色影像的关键步骤在于获得色彩柔和、反差适中的底图.而在遥感信息软件平台(如ERDAS)以及地理信息软件平台(如ARCGIS)上对单幅卫星数据进行细微的、局部的光谱增强往往捉襟见肘.使用PHOTOSHOP这一大众化软件进行卫星影像光谱增强方便快捷,且容易掌握.研究使用该工具进行光谱增强的一般规律及优势,通过探讨得出大面积卫星影像快速解译的普遍方法.