72.5 kV GIS系统在松花江大顶子山航电枢纽工程水电站的应用

着重介绍全封闭组合电器的特点、安装方法和安装过程中应注意的事项,增加对全封闭组合电器的掌握,有利于设备更加安全稳定运行。     

谈工程设计中的限额设计

限额设计体现了设计标准、规模、原则的合理确定 ,以及有关概、预算基础资料的合理取定。进行多层次的控制与管理 ,步步为营 ,层层控制 ,才能最终实现控制投资的目标 ,同时 ,实现对设计规模、设计标准、工程数量与概算指标等各个方面的多维控制     

火电厂化学吸收CO2捕获工艺的应用与能耗分析

从火力发电厂烟气特性出发,分析了化学吸收CO2捕获工艺流程,评估了醇胺吸收剂和改进型吸收剂的特点及适用性,总结了吸收剂在国内外CO2捕获示范工程中的应用情况,提出了化学吸收工艺能耗分析参数体系,通过工程和理论研究两个路径对化学吸收CO2捕获工艺的能耗水平进行了分析.分析结果表明化学吸收工艺吸收剂以胺和混合胺为市场主导,CO2捕获吸收剂的再生能耗一般介于3.0～4.2GJ/t之间.     

The Added Value of Accounting For Users’ Flexibility and Information on the Potential of a Station-Based One-Way Car-Sharing System: An Application in Lisbon,Portugal

Car-sharing systems are an alternative to private transportation whereby a person may use an automobile without having to own the vehicle. The classical systems in Europe are organized in stations scattered around the city where a person may pick up a vehicle and afterward return it to the same station (round trip). Allowing a person to drop off the vehicle at any station, called one-way system, poses a significant logistics problem because it creates a significant stock imbalance at the stations, which means that there will be times when users will not have a vehicle available for their trip. Previous mathematical programming formulations have tried to overcome this limitation by optimizing trip selection and station location in a city in order to capture the best trips for balancing the system. But there was one main limitation: The users were assumed to be inflexible with respect to their choice of a station, and held to use only the one closest to their origin and destination. If the user is willing to use the second or even the third closest station the user could benefit from using real-time information on vehicle stocks at each station and be able to select the one with available capacity. In this article we extend a previous model for trip selection and station location that takes that aspect into account by considering more vehicle pick-up and drop-off station options and then apply it to a trip origin–destination matrix from the Lisbon region in Portugal. Through the extended formulation we were able to conclude that user flexibility allied with having information on vehicle stocks increases the profit of the company, as people will go directly to a station with a vehicle available, thus making the use of the fleet more efficient. Observing the size of the stations resulting from the model, we also concluded that the effect of information is enhanced by large car-sharing systems consisting of many small stations.     

波长对桩基透空式防波堤透浪性的影响

桩基透空式防波堤的透浪性主要受波浪水深条件、挡浪板入水深度、桩基结构布置等因素的影响,并且各种因素相互作用,较为复杂。结合两个实际工程的断面物模试验,着重分析了波长对防波堤透浪性的影响,试验结果对类似工程的设计具有较好的参考价值。     

3S技术在土地利用调查中的应用

基于无人机遥感图像的分类精度和高分辨率的图像特征,得出面向对象的遥感影像分类方法,即应用无人机遥感技术进行土地利用的快速详查信息提取。运用GIS技术,着重研究土地利用数据库的建立方法及构建过程,通过该数据库构建的时空模型,可有效地避免数据冗余问题,建立的数据库还可实现土地的详查追溯,通过图像的层次叠加获取历史土地详查的全区土地信息。     

一种后支撑桥提升的电动液压控制系统的设计

随着汽车电子控制技术和液压控制技术的迅猛发展,一种后支撑桥提升的电动液压控制装置应运而生,此方法操纵控制简便,自动化程度高。     

韧性理念在道路交通规划中的应用研究

道路交通系统在城市日常运行中承担着重要的作用,频发的意外事件会对交通系统产生不可逆的影响.尤其是新冠肺炎疫情的爆发,突出了韧性交通基础设施的重要性.基于韧性的理念,从冗余性和脆弱性2个维度提出连接度指数和节点关键度2个量化指标.以佛山三龙湾片区路网为例,在道路交通规划应用中,通过评估现状道路网络韧性识别现状症结,以韧性...     

鱼山作业区规划调整方法与对策

针对舟山绿色石化基地最新的产业规划和总体布局，开展了鱼山作业区规划调整的工作。通过分析鱼山作业区规划实施的效果，进行运输需求分析和设计船型预测，提出规划调整的范围和重点，并总结出规划调整的原则，包括根据液体化工船小型化特点合理布置泊位；专业化集装箱码头可以有效提供码头装卸效率，节省岸线资源；根据泊位等级合理布置码头形式。结果表明，调整后的规划方案能够节省工程投资，提高装卸效率，节约港口岸线资源。     

Causality between performance and traffic: an investigation with Indian ports

This paper attempts to find out the causal relationship between port performance and port traffic by using Indian data. The use of cointegration analysis has come out with the result that performance precedes traffic in most of the ports of India. Hence, government policy towards performance augmenting facilities should be given priority so that higher efficiency induces higher traffic