Application of BIM technology in refrigeration station design

This paper mainly discusses the problems existing in the traditional design process of the refrigeration station and tries to solve them with BIM technology. Considering the characteristics of BIM technology, BIM design process is presented based on the traditional design process to achieve the goal of improving design quality and efficiency.

A bi-level optimization framework for charging station design problem considering heterogeneous charging modes

Purpose–The purpose of this paper is to optimize the design of charging station deployed at the terminal station for electric transit,with explicit consideration of heterogenous charging modes.Design/methodology/approach–The authors proposed a bi-level model to optimize the decision-making at both tactical and operational levels simultaneously.Specifically,at the operational level(i.e.lower level),the service schedule and recharging plan of electric buses are optimized under specific design of charging station.The objective of lower-level model is to minimize total daily operational cost.This model is solved by a tailored column generation-based heuristic algorithm.At the tactical level(i.e.upper level),the design of charging station is optimized based upon the results obtained at the lower level.A tabu search algorithm is proposed subsequently to solve the upper-level model.Findings–This study conducted numerical cases to validate the applicability of the proposed model.Some managerial insights stemmed from numerical case studies are revealed and discussed,which can help transit agencies design charging station scientifically.Originality/value–The joint consideration of heterogeneous charging modes in charging station would further lower the operational cost of electric transit and speed up the market penetration of battery electric buses.

Structural Design and Protective Methods for the 100 kW Shoreline Wave Power Station

The structural design and protective methods for the 100 kW shoreline wave power station in China are described in detail. The proper structural type is designed for effective minimization of wave loads and bending stress. Various protective devices are adopted to protect the station in the extreme conditions against excessive power of airflow, excessive torsion of the shaft, over-pressure of the chamber, over-speed of rotation, power failure, and so on. It turns out that the structural design and protective methods for the 100 kW shoreline wave power station are successful.

Design scheme for fast charging station for electric vehicles with distributed photovoltaic power generation

The demand for fast charging is increasing owing to the rapid expansion of the market for electric vehicles. In addition, the power generation technology for distributed photovoltaic has matured. This paper presents a design scheme for a fast charging station for electric vehicles equipped with distributed photovoltaic power generation system taking the area with certain conditions in Beijing as an example construction site. The technical indexes and equipment lectotype covering the general framework and subsystems of the charging station are determined by analyzing the charging service demand of fast charging stations. In this study, the layout of the station is developed and the operation benefits of the station is analyzed. The design scheme realizes the design objective of "rationalization, modularization and intelligentization" of the fast charging station and can be used as reference for the construction of a fast charging network in urban area.

First large charging station with typical design put into operation

On March 31, in accordance with the typical design requirements of the State Grid, the f irst large electric vehicle (EV) charging station, built by the North China Grid,

Planning and Design of Dashuigou Reserve Station in Fengtongzhai Nature Reserve of Sichuan Province

Characteristics of Fengtongzhai Nature Reserve were analyzed from the perspective of animal and plant resources and cultural type. Design concepts of Dashuigou Reserve Station were proposed by combining with site characteristics, and key design points were summarized.

Design and development of infrastructure of the Dome A Kunlun Station(2005–2015)

To enable further advanced study of Antarctica, a new station called Kunlun Station has been built by China in the Dome A region of the inland East Antarctic ice sheet. This paper describes the Antarctic station building design system that was developed with consideration of factors that may affect Kunlun Station, such as environment and climate, construction work and transport, environmental protection and energy conservation, psychological requirements and functional requirements. The design system included site selection, station planning, external building form, construction work, function and indoor environment, energy conservation, environmental protection, and material strategy. We also describe the experience acquired during the transportation and construction phases of Kunlun Station.

Impression Remolding: On Design of Lijiang Railway Station

This paper takes "impression remolding" as the hint of design concept, analyzes uniqueness and correlation of Lijiang Train Station, and also multiple design techniques of integrating regional cultural elements, such as roofi ng cluster.

Study on Urban Design of Luohu Railway Station Area from the Perspective of Integrated Urban Design

Traffic hub in modern cities has gradually evolved into a multi-functional, all-around and three-dimensional complex. Based on the integrated thinking and relevant urban design theories, this paper took Shenzhen Luohu Railway Station for example, evaluated the status quo of the study area from the perspectives of spatial form and public space, including traffic space, square, walking space, green space and waterfront system, and put forward corresponding suggestions.

Artistic Space Design of Subway Station Based on Regional Characteristics

On the basis of existing problems in the spatial design of subway station, this paper explored the principles that regional culture involves in the artistic space design of subway station; based on the analysis of three main design sections and site cases-spatial interface, public art and color, the paper also discussed the artistic application and design embodiment of regional culture characteristics reflected in every element of subway station space design, so as to provide a consolidated design example for subway station space design featuring regional characteristics in the future.

Design of the Pumping Stations and the Gas Puffing Systems for the Superconducting Tokamak HT-7U

The design of the pumping stations and the gas injection systems for the inner Chamber and the cryostat on HT-7U superconducting tokamak is described in this paper.

Concept Design,Modeling and Station-keeping Attitude Control of an Earth Observation Platform

The stratosphere airship provides a unique and promising platform for earth observation. Researches on the project design and control scheme for earth observation platforms are still rarely documented. Nonlinear dynamics, model uncertainties, and external disturbances contribute to the difficulty in maneuvering the stratosphere airship. A key technical challenge for the earth observation platform is station keeping, or the ability to remain fixed over a geo-location. This paper investigates the conceptual design, modeling and station-keeping attitude control of the near-space earth observation platform. A conceptual design of the earth observation platform is presented. The dynamics model of the platform is derived from the Newton-Euler formulation, and the station-keeping control system of the platform is formulated. The station-keeping attitude control approach for the platform is proposed. The multi-input multi-output nonlinear control system is decoupled into three single-input single-output linear subsystems via feedback linearization, the attitude controller design is carried out on the new linear systems using terminal sliding mode control, and the global stability of the closed-loop system is proven by using the Lyapunov theorem. The performance of the designed control system is simulated by using the variable step Runge-Kutta integrator. Simulation results show that the control system tracks the commanded attitude with an error of zero, which verify the effectiveness and robustness of the designed control system in the presence of parametric uncertainties. The near-space earth observation platform has several advantages over satellites, such as high resolution, fast to deploy, and convenient to retrieve, and the proposed control scheme provides an effective approach for station-keeping attitude control of the earth observation platform.

Space Resources Planning and Design of Rail Transit Station in Chongqing

According to the study on 39 sites of rail transit Line 3 in Chongqing, the sites are classifi ed into three types: residential type, business center type, traffi c hub type in this paper. The study shows that the sites have many problems such as discordance of land use, severity of spatial segregation, low rate of site utilization. To solve these problems, development approaches of site space resources within 1,000 m around the site area are further explored. The approaches include four aspects: characteristics of land use, functional composite, walking guide and shuttle transportation. In addition, appropriate planning and design methods are proposed.

Design of Ground Control Station for Operation of Multiple Combat Entities

Recently, if you look at the trend of the Unmanned Combat Entities (UCE) on the world that are actually operational, a large number of personnel per one UCE has been operating the GCS. However, UCEs to perform the attack/reconnaissance mission are very expensive assets and require a considerable amount of time to train for UCE operations. Accordingly, the future battlefield environment has become important to develop multiple UCE ground control station. In this study, we developed a multiple UCE GCS that one operator can operate up to four UCEs. The software was built with a total of 6 displays using a Lockheed Martin Corporation’s prepar3D. Scenario of research takes into account the operation of the South Korea-type future multiple UCEs, to take advantage of the simulation system, in this paper, we propose for each of the concepts and technologies.

基于PowerDesigner的通信台站数据库的设计

介绍了通信台站数据库的设计过程。通过对通信保障业务流程的了解,结合通信台站的组织结构特点和其在通信保障体系中的作用,在分析了系统实际需求的基础上,总结出其涉及的实体对象及关系。利用建模工具PowerDesigner建立了概念数据模型,进而生成物理数据模型,并在物理层让它们与SQL Server 2000建立了连接,最终在SQL Server 2000中成功生成了数据库。

Rock mechanical problems and optimization for the long and deep diversion tunnels at Jinping Ⅱ hydropower station

According to site-specific environments such as high water pressures, high in-situ stresses and strong rockbursts, the design scheme of the long and deep diversion tunnels at Jinping II hydropower station was optimized to ensure construction safety. New drainage tunnels were considered. Furthermore, lining structures and grouting pressures were modified during the excavation of tunnels. The construction scheme was updated dynamically based on the complex geological conditions. For instances, the diversion tunnels were first excavated by drilling and blasting method at the first stage of construction, and then by the combination method of tunnel boring machine （TBM） and drilling and blasting, and finally by drilling and blasting method. Through optimized scheme and updated construction scheme, the excavation of diversion tunnel #1 was successfully completed in June, 2011. This paper summarizes the key issues in rock mechanics associated with the construction of the long and deep diversion tunnels at Jinping II hydropower station. The experiences of design and construction obtained from this project could provide reference to similar projects.

Analysis of the Development of the Commercial Space Around Metro Stations in Urban Core Areas Based on Place Making: A Case Study of Chunxi Road Metro Station in Chengdu

The metro is the most efficient and convenient public transport system in modern cities. For urban core areas in China, in which the metro was built later, there was more consideration for meeting the traffic needs of cities. However, there are few studies of collaborative planning for metro stations and their surrounding space. Thus, there is an urgent need to conduct research on collaborative planning for metro stations and their surrounding commercial space in urban core areas. Unlike conventional methods of integrated design of stations and cities, this paper, based on the theory of place spirit, took Chunxi Road Metro Station in Chengdu and its surrounding commercial space for example. It explored the pattern and characteristics of the place in the commercial space around the metro station, analyzed the strategies of cultural and commercial integration, as well as architecture, street, landscape and other aspects of the design method in the space, and explored the strategies of place-making and infiltration, providing a reference point for the development and place-making of the commercial space around metro stations in urban core areas.

大型封闭空间中UWB定位基站拓扑的通用设计方法

超宽带(ultra-wide band,UWB)技术是无人装备在巡检具有多障碍物的大型封闭空间时获取定位坐标的主要方法之一。目前主要依赖人工方式设计UWB定位基站拓扑的构型、位置和数量。这种方式存在设计效率低下,设计效果未知,性价比难以确定等问题。为此,本文提出了一套较为科学完善的定位基站拓扑评价体系,并提出了一种在大型封闭空间中自动设计定位基站拓扑的通用方法。该方法以仿真模拟为基础,通过遗传算法结合拓扑评价体系,自动生成贴合实际应用场景的最优拓扑方案,包括最优的基站布设数量以及布设位置信息。实验结果表明:1)经通用设计方法生成的拓扑相比使用基站数量最多的拓扑,综合性能提高了6.2%;相比使用基站数量最少的拓扑,综合性能提高了21.2%。2)经通用设计方法生成的拓扑相比人工设计的锯齿形拓扑,综合性能提高了11.4%,设计效率提高了92.9%。可见,针对具有多障碍物的大型封闭空间场景,本文的方法可以在较短的时间内设计出综合性能较优,性价比较高的定位基站拓扑,为无人装备在此类大型封闭空间中开展全自主定位和巡检奠定了基础。

铁路隧道紧急救援站站台设计标准研究

目前防灾救援疏散规范的站台设计标准是针对带列车门梯的列车制定的,而紧急救援站站台宽度、高度、位置等设计标准关系到人员从事故列车疏散到安全区域的时间及效率,对于现行动车组列车,客室地面较高及门梯数量有限导致疏散时间偏长及存在次生安全隐患风险是亟待解决的问题。首先详细调研现行紧急救援站站台的设计现状,归纳现行标准存在的问题;然后结合铁路公司应急演练实际情况,深入研究隧道紧急救援站站台标准方案,提出“现行站台+列车配门梯”“不侵限高站台”“不侵限中高站台”“修改限界高站台”及“高站台加翻板”5种设计方案,对各自优缺点进行详细分析并进行方案比选;最后推荐“修改限界高站台”与“高站台加翻板”方案,以此为基础对隧道防灾疏散救援规范进行修正,为我国铁路隧道防灾救援工程标准全面制定提供参考。

PE station三维设计软件一体化应用研究

对管路及设备工厂三维设计软件现状做了介绍,指出了PE station三维设计软件一体化应用研究的目的和意义,并从PID、OPENPLANT(modeler)、PLANTFLOW、ISO 4个模块详细介绍了一体化应用方案。利用PE station一体化应用平台软件可以从前期可研阶段系统图设计,到招标技施阶段三维建模设计、管路系统损失和水锤计算分析、高效出图及材料统计,再到竣工验收阶段三维数字化移交设计,均利用三维设计手段实现设计的全生命周期管理,提高设计质量和效率,节约人力资源,为EPC等模式的工程项目管理、智能化、智慧型电站建设提供有力支撑。