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基于行人仿真技术的地铁车站疏散能力模拟测试方法分析 被引量:2
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作者 王九州 李耿旭 《市政技术》 2023年第6期107-110,120,共5页
城市轨道交通车站疏散能力是车站设计过程中的重点之一,车站设施能力设计要满足紧急情况下的乘客疏散要求。交通运输部要求地铁线路初期运营前应编制大客流车站的通过能力模拟测试报告,但对于具体技术方法和编制深度等并没有统一要求。... 城市轨道交通车站疏散能力是车站设计过程中的重点之一,车站设施能力设计要满足紧急情况下的乘客疏散要求。交通运输部要求地铁线路初期运营前应编制大客流车站的通过能力模拟测试报告,但对于具体技术方法和编制深度等并没有统一要求。基于行人仿真技术并结合天津地铁8号线一期工程,提出了地铁车站疏散能力模拟测试工作要点,评价了实例中疏散时间指标和人流密度指标,分析了疏散方案优化前、后情况,为类似工程提供了参考。 展开更多
关键词 地铁车站 行人仿真技术 疏散能力 模拟测试方法
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转毂模拟实际道路行驶排放(RDE)试验方法 被引量:4
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作者 闵浪 刘爽 +1 位作者 王猛 顾王文 《时代汽车》 2021年第10期8-9,30,共3页
本文针对国六排放法规中真实驾驶污染物排放试验(II型试验)的要求,研究了将道路试验过程中采集到的多维工况转化到转鼓试验室,利用全流排放测试系统(CVS)和PEMS串联同时进行车辆的RDE测试,并研究分析RDE测试在实验室复现与路试结果的等... 本文针对国六排放法规中真实驾驶污染物排放试验(II型试验)的要求,研究了将道路试验过程中采集到的多维工况转化到转鼓试验室,利用全流排放测试系统(CVS)和PEMS串联同时进行车辆的RDE测试,并研究分析RDE测试在实验室复现与路试结果的等效性和差异性,为下一阶段的RDE排放标定开发转移至试验室内给出了代表性方法。 展开更多
关键词 实际行驶污染物排放 转毂 模拟测试方法
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GIS设备开关操作对其传感器和智能组件端口骚扰电压的模拟试验研究 被引量:11
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作者 刘骁繁 崔翔 +4 位作者 吴恒天 雷林绪 赵波 赵鹏程 焦重庆 《智能电网》 2015年第1期67-73,共7页
GIS变电站结构紧凑,因电子设备与一次设备高度融合,使得电子设备的电磁兼容问题显得尤为重要。GIS设备开关操作产生的特快速瞬态电磁过程主要由传感器–电缆–智能组件这段电路对电子设备产生电磁影响。针对变电站电磁环境的复杂性,且... GIS变电站结构紧凑,因电子设备与一次设备高度融合,使得电子设备的电磁兼容问题显得尤为重要。GIS设备开关操作产生的特快速瞬态电磁过程主要由传感器–电缆–智能组件这段电路对电子设备产生电磁影响。针对变电站电磁环境的复杂性,且现场测量是获得传感器和智能组件端口电磁骚扰数据的主要手段,提出一种GIS设备传感器和智能组件端口瞬态电磁骚扰的模拟测试方法,该方法无需改变变电站原有的传感器和智能组件,且在变电站现场具有很强的可操作性,然后分别将该方法应用于实验室GIS设备试验研究平台及智能变电站现场,并获得GIS设备传感器和智能组件端口电磁骚扰的时域和频率特性。研究结果表明,采用有效的屏蔽措施和接地技术后,220 kV电压等级GIS变电站开关操作产生的电磁骚扰对传感器和智能组件的正常工作不构成严重威胁。 展开更多
关键词 GIS设备 开关操作 模拟测试方法 智能组件 电磁骚扰
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Advance in Application of Regional Climate Models in China
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作者 ZHANG Wei YAN Minhua +1 位作者 CHEN Panqin XU Helan 《Chinese Geographical Science》 SCIE CSCD 2008年第1期93-100,共8页
Regional climate models have become the powerful tools for simulating regional climate and its change process and have been widely used in China. Using regional climate models, some research results have been obtained... Regional climate models have become the powerful tools for simulating regional climate and its change process and have been widely used in China. Using regional climate models, some research results have been obtained on the following aspects: 1) the numerical simulation of East Asian monsoon climate, including exceptional monsoon precipitation, summer precipitation distribution, East Asian circulation, multi-year climate average condition, summer rain belt and so on; 2) the simulation of arid climate of the western China, including thermal effect of the Qinghal-Tibet Plateau, the plateau precipitation in the Qilian Mountains; and the impacts of greenhouse effects (CO2 doubling) upon climate in the western China; and 3) the simulation of the climate effect of underlying surface changes, including the effect of soil on climate formation, the influence of terrain on precipitation, the effect of regional soil degradation on regional climate, the effect of various underlying surfaces on regional climate, the effect of land-sea contrast on the climate formulation, the influence of snow cover over the plateau regions on the regional climate, the effect of vegetation changes on the regional climate, etc. In the process of application of regional climate models, the preferences of the models are improved so that better simulation results are gotten. At last, some suggestions are made about the application of regional climate models in regional climate research in the future. 展开更多
关键词 regional climate model model application research advance China
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Adding Pseudo-Random Test Sequence Generator in the Test Simulator for DFT Approach
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作者 Afaq Ahmad Dawood Al-Abri Sayyid Samir AI-Busaidi 《Computer Technology and Application》 2012年第7期463-470,共8页
This paper presents modified version of a realistic test tool suitable to Design For Testability (DFT) and Built-ln Self Test (BIST) environments. A comprehensive tool is developed in the form of a test simulator.... This paper presents modified version of a realistic test tool suitable to Design For Testability (DFT) and Built-ln Self Test (BIST) environments. A comprehensive tool is developed in the form of a test simulator. The simulator is capable of providing a required goal of test for the Circuit Under Test (CUT). The simulator uses the approach of fault diagnostics with fault grading procedures to provide the optimum tests. The current version of the simulator embeds features of exhaustive and pseudo-random test generation schemes along with the search solutions of cost effective test goals. The simulator provides facilities of realizing all possible pseudo-random sequence generators with all possible combinations of seeds. The tool is developed on a common Personal Computer (PC) platform and hence no special software is required. Thereby, it is a low cost tool hence economical. The tool is very much suitable for determining realistic test sequences for a targeted goal of testing for any CUT. The developed tool incorporates flexible Graphical User Interface (GUI) procedures and can be operated without any special programming skill. The tool is debugged and tested with the results of many bench mark circuits. Further, this developed tool can be utilized for educational purposes for many courses such as fault-tolerant computing, fault diagnosis, digital electronics, and safe-reliable-testable digital logic designs. 展开更多
关键词 Digital system testing built-in self test design for testability test vector pseudo-random test sequence linear feedbackshift registers fault diagnosis fault collapsing realistic test fault cover iteration.
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Experimental investigation of clam water impact on flatted-bottom seafloor mining tool
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作者 胡小舟 刘少军 《Journal of Central South University》 SCIE EI CAS 2014年第2期533-539,共7页
A test rig for constant velocity water entry experiments was developed that drives a flatted-bottom section attached on six degree of freedom(6-DOF) platform to enter the water vertically at near constant velocity.The... A test rig for constant velocity water entry experiments was developed that drives a flatted-bottom section attached on six degree of freedom(6-DOF) platform to enter the water vertically at near constant velocity.The experiment system,which consists of drive and actuation system,water pool,model test sections,load cell,and control system,was presented.Water entry forces of different velocities were measured during impact process,and for each test case,three runs were performed with the same motion program to check the repeatability of the force readings.The experiment results are compared with two-dimensional(2D) CFD simulation methods for flatted-bottom rigid bodies with constant entry velocity.Experimental results indicate that the impact forces mainly depend on water entry velocities.It is concluded that the feasibility and accuracy of simulation methods has been validated. 展开更多
关键词 water entry water impact constant velocity DEPLOYMENT
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