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.

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.

BIM技术在绵泸高速铁路泸州站设计建设中的应用

大中型铁路客运站是高速铁路设计和施工中的复杂节点,其建设直接影响整条线路的施工质量和进度。本文以绵泸高速铁路泸州站为例,将BIM技术运用到车站的工程设计、施工和项目管理中。结果表明:利用BIM技术完成站场内路基、桥涵、轨道、接触网、综合管线及站房结构的系统建模,可发现结构间存在的干扰问题,及时对相关结构进行综合调整,优化站场设计,避免因站内各构筑物交叉干扰引起的设计和施工质量问题,达到在施工过程中规避风险、提升质量、缩短工期的目的。

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。

城市轨道交通大型换乘车站应急防灾设计

[目的]鉴于大型城市轨道交通(以下简称“城轨”)换乘车站数量不断增加,以及该类车站具有埋深较大、人员密集、逃生救援场地受限的特征,应急防灾难度和压力十分突出,因此需要对此类型车站的应急防灾进行设计。[方法]以武汉光谷广场综合体工程作为实际案例,从火灾防护、大客流防护、洪涝防护、恐袭防护及突发疫情防护等5个重点方面,分析大型城市轨道交通车站所面临的灾害特征,结合方案设计、模拟仿真、计算分析等方式,对不同类型的灾害提出解决方案。[结果及结论]采用开放式的建筑布局和贯通的人行交通层,结合自然排烟与下沉广场设置准安全区,是困难条件下大型地下空间的有效消防措施;结合车站特点分析客流高峰情况,对不同时段、不同类型的使用人群进行分类,并设置相对独立、交叉少的流线,以有效地进行大客流防护;除常规的洪涝防护措施外,提高与周边地下空间的硬隔离措施,如增加防淹门是作为洪涝防护的必要手段;提高站内的通透性,快速疏解乘客,避免堵塞滞留可有效防护恐怖袭击;对于突发疫情防护,应严格按照我国相关管理规定,落实日常防控管理,适时采取一般疫情或较大疫情响应措施。

绿色视角下的高铁站房腔体植入策略与模拟验证研究

由于体量和形式的特殊性,高铁站房的舒适度问题比一般建筑更为突出,以绿色视角审视其设计具有较大的优化潜力。近年来建筑学界对腔体的关注增多,而高铁站房方案设计中针对性地设置腔体、操作方法等方面的研究尚显不足。立足于方案设计阶段,针对空间特征与现存问题,从宏观层面上构建了对候车环境品质多重导控的腔体层级,探讨了“结构腔”、“功能腔”和“绿景腔”三类腔体的植入方式。构建典型模型并生成研究方案用于量化研究。通过性能模拟技术,验证了腔体植入对室内气流、采光质量有显著提升的效果。腔体植入策略打破了当前高铁站房固定的空间模式,为我国高铁站房的绿色创新提供参考,在实践中具有广泛的应用价值。

合肥市地下两层标准车站主体结构设计分析

文章结合合肥市2~7号线地下两层标准车站主体结构设计情况,从主要结构构件尺寸、配筋率、梁柱节点、诱导缝等方面进行总结,在统计已经成功实施的11座地下两层标准车站主体结构设计参数的基础上,根据站台宽度和结构的不同,从板、墙、梁、柱等主要受力构件的尺寸和配筋率等方面进行统计分析,得出规律和指导性指标,并对部分细节做法提出了完善建议。

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.

长距离输水泵站中空气罐参数敏感度分析及正交优化设计

为了探讨长距离输水泵站中空气罐的优化设计方法,以西北某长距离输水工程为例,以泵站水击最大正压水头和最小负压水头作为优化目标,以初始气体压力、高度直径比、连接管直径、进口阻力系数和出口阻力系数为优化变量,基于正交优化设计方法和KYPipe软件,采用极差分析法获得空气罐各参数对于水击最大正压水头和最小负压水头的影响,同时对得到的结果进行排序,比较并找到最优参数组合.结果表明:初始气体压力、连接管直径和出口阻力系数等因素对于水击最大正压水头和最小负压水头的影响程度较大,其中初始气体压力是最敏感的参数,对于最大正压水头和最小负压水头的影响程度最大;经过比较发现最优方案的参数组合为初始气体压力水头50 m、高度直径比4、连接管直径250 mm、进口阻力系数10、出口阻力系数5;相比原始方案,优化方案使泵站的水击最大正压水头降低4.98%、最小负压水头升高64.00%.