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Prototype Engineering Test Platform of ITER Magnet Gravity Support 被引量:2
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作者 廖敏 李鹏远 +3 位作者 侯炳林 杨淑娟 付猷昆 R. GALLIX 《Plasma Science and Technology》 SCIE EI CAS CSCD 2013年第2期192-195,共4页
ITER magnet gravity support (GS) has been redesigned as a structure of pre- assembled nmlti-flexible plates instead of the original welded structure. In the past several years, engineering tests of the new structure... ITER magnet gravity support (GS) has been redesigned as a structure of pre- assembled nmlti-flexible plates instead of the original welded structure. In the past several years, engineering tests of the new structure have been proposed. A prototype engineering test plat- form is being developed. In order to apply the loads/load combinations onto the test mock-up, seven hydraulic bolt tensioners in three directions have been applied to simulate various loads (forces and moments), through which the deformation of bolts, flexible plates and clamp blocks, the stress distribution in the flexible plates, the friction between the contact surface, etc. can be monitored/tested. The measurement and control system includes seven sets of synchronization controller, a 16-channel strain gauge, 25 sets of displacement sensors, etc. Principles of EDC220 digital controller and development of multi-channel control software are also demonstrated. 展开更多
关键词 ITER gravity support engineering test FEM analysis measurement andcontrol system
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Flue Gas Desulfurization Testing andIts Engineering Practice
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作者 LuoYonglu 《Electricity》 1999年第4期21-25,共5页
关键词 OH In SO Flue Gas Desulfurization testing andIts engineering Practice
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Prestage Engineering for Dacheng Coalbed Gas Test Completed
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《China Oil & Gas》 CAS 1998年第3期168-168,共1页
关键词 test Prestage engineering for Dacheng Coalbed Gas test Completed
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120-ton Thrust Liquid-Oxygen/Kerosene Engine Passed Acceptance Test
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《Aerospace China》 2012年第2期24-24,共1页
On May 28, the 120-ton thrust liquid-oxygen/kerosene engine developed by the Academy of Aerospace Liquid Propulsion Technology (AALPT) passed the acceptance test organized by China National Space Administration (CNSA)... On May 28, the 120-ton thrust liquid-oxygen/kerosene engine developed by the Academy of Aerospace Liquid Propulsion Technology (AALPT) passed the acceptance test organized by China National Space Administration (CNSA). The 120-ton thrust liquid-oxygen/kerosene engine is a non-pollution, non-toxic, high performance and reliable basic pro- 展开更多
关键词 engine ton Thrust Liquid-Oxygen/Kerosene engine Passed Acceptance test high
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AN HIERARCHICAL OCCLUSION TEST ALGORITHM FOR GLOBAL ILLUMINATION SOLUTION
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作者 孙济洲 吴奇 +1 位作者 邢昌玉 GrimsdaleRL 《Transactions of Tianjin University》 EI CAS 1998年第1期37-41,共5页
This paper presents an efficient hierarchical occlusion test algorithm to support the global illumination solution such as Ray Tracing and Radiosity. This method, which is based on a cone volume intersection examinati... This paper presents an efficient hierarchical occlusion test algorithm to support the global illumination solution such as Ray Tracing and Radiosity. This method, which is based on a cone volume intersection examination, can rapidly remove the irrelevant parts in a scene and find the vertices which fall into the shadow area of a given object. It is an effective alternative to the conventional shadow feeler method. 展开更多
关键词 global illumination RADIOSITY occlusion test Information engineering
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Design of comprehensive test system for detecting overlying strata mining-induced fractures on surface with radon gas 被引量:1
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作者 Zhang Wei Zhang Dongsheng Fan Gangwei 《Mining Science and Technology》 EI CAS 2011年第6期823-827,共5页
Based on radon gas properties and its existing projects applications, we firstly attempted to apply geo- physical and chemical properties of radon gas in the field of mining engineering, and imported radioac- tive mea... Based on radon gas properties and its existing projects applications, we firstly attempted to apply geo- physical and chemical properties of radon gas in the field of mining engineering, and imported radioac- tive measurement method to detect the development process of the overlying strata mining-induced fractures and their contained water quality in underground coal mining, which not only innovates a more simple-fast-reliable detection method, but also further expands the applications of radon gas detection technology in mining field. A 3D simulation design of comprehensive testing system for detecting strata mining-induced fractures on surface with radon gas (CTSR) was carried out by using a large-scale 3D solid model design software Pro/Engineer (Pro/E), which overcame three main disadvantages of ''static design thought, 2D planar design and heavy workload for remodification design'' on exiting design for mining engineering test systems. Meanwhile, based on the simulation design results of Pro/E software, the sta- bility of the jack-screw pressure bar for the key component in CTSR was checked with a material mechan- ics theory, which provided a reliable basis for materials selection during the latter machining process. 展开更多
关键词 Mining engineering Radon gas detection technology Mining-induced fractures Comprehensive test system Pro/engineer 3D simulation
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Research on cooling-temperature control strategy of fuel-cell engine test bench
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作者 Chang Du Tiancai Ma +2 位作者 Weikang Lin Kaihang Song Yonghao Liang 《Clean Energy》 EI CSCD 2023年第1期42-52,共11页
As one of the important ways to utilize hydrogen energy,fuel cells are receiving more and more attention and research from countries and institutions.To meet the practical needs of testing the performance of high-powe... As one of the important ways to utilize hydrogen energy,fuel cells are receiving more and more attention and research from countries and institutions.To meet the practical needs of testing the performance of high-power fuel-cell systems and simulate the actual application environment as much as possible,a fuel-cell system test bench is usually used to test the system performance,in which the cooling-temperature control of the test bench has a great impact on the results of the performance of the fuel-cell system.This paper studies the cooling-temperature control strategy of a 150-kW-class fuel-cell engine test platform,proposes a new test-bench cooling-system structure with a thermostat and heat exchanger as the main heat-dissipation components,and compares and analyzes the impact of coordinated thermostat and heat-exchanger control on the fuel-cell system test performance.The test results show that the control strategy of the coordinated operation of a thermostat and heat exchanger can maintain the steady-state error to within±0.3℃and maintain the temperature variation to within±1.5℃during the loading-condition test,so as to avoid the limitation of system output performance due to excessive cooling-temperature fluctuation and ensure that the fuel-cell engine performance-test process is carried out smoothly and efficiently. 展开更多
关键词 fuel-cell engine test bench cooling-temperature control strategy THERMOSTAT heat exchanger
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Numerical simulation of tritium behavior under a postulated accident condition for CFETR TEP system
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作者 Hai-Xia Wang Xue-Wei Fu +2 位作者 Wei-Ping Liu Tao-Sheng Li Jie Yu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第7期206-218,共13页
China Fusion Engineering Test Reactor(CFETR)is China's self-designed and ongoing next-generation fusion reactor project.Tritium confinement systems in CFETR guarantee that the radiation level remains below the saf... China Fusion Engineering Test Reactor(CFETR)is China's self-designed and ongoing next-generation fusion reactor project.Tritium confinement systems in CFETR guarantee that the radiation level remains below the safety limit during tritium handling and operation in the fuel cycle system.Our tritium technology team is responsible for studying tritium transport behavior in the CFETR tritium safety confinement systems of the National Key R&D Program of China launched in 2017,and we are conducting CFETR tritium plant safety analysis by using CFD software.In this paper,the tritium migration and removal behavior were studied under a postulated accident condition for the Tokamak Exhaust Processing system of CFETR.The quantitative results of the transport behavior of tritium in the process room and glove box during the whole accident sequence(e.g.,tritium release,alarm,isolation,and tritium removal)have been presented.The results support the detailed design and engineering demonstration-related research of CFETR tritium plant. 展开更多
关键词 China Fusion engineering test Reactor(CFETR) Tokamak Exhaust Processing(TEP)system Numerical simulation Tritium transport behavior Tritium confinement system Accident condition
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3D fluid model analysis on the generation of negative hydrogen ions for negative ion source of NBI
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作者 邢思雨 高飞 +3 位作者 张钰如 王英杰 雷光玖 王友年 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第10期105-116,共12页
A radio-frequency(RF) inductively coupled negative hydrogen ion source(NHIS) has been adopted in the China Fusion Engineering Test Reactor(CFETR) to generate negative hydrogen ions.By incorporating the level-lumping m... A radio-frequency(RF) inductively coupled negative hydrogen ion source(NHIS) has been adopted in the China Fusion Engineering Test Reactor(CFETR) to generate negative hydrogen ions.By incorporating the level-lumping method into a three-dimensional fluid model,the volume production and transportation of H^(-) in the NHIS,which consists of a cylindrical driver region and a rectangular expansion chamber,are investigated self-consistently at a large input power(40 k W) and different pressures(0.3–2.0 Pa).The results indicate that with the increase of pressure,the H^(-) density at the bottom of the expansion region first increases and then decreases.In addition,the effect of the magnetic filter is examined.It is noteworthy that a significant increase in the H^(-) density is observed when the magnetic filter is introduced.As the permanent magnets move towards the driver region,the H^(-) density decreases monotonically and the asymmetry is enhanced.This study contributes to the understanding of H-distribution under various conditions and facilitates the optimization of volume production of negative hydrogen ions in the NHIS. 展开更多
关键词 negative hydrogen ion sources China Fusion engineering test Reactor three-dimensional fluid model(Some figures may appear in colour only in the online journal)
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具有测试功能的机载雷达软件仿真系统
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作者 杨润亭 《现代雷达》 CSCD 北大核心 1998年第1期22-27,共6页
描述供机载雷达应用软件调试、测试用的软件仿真系统。它不但能仿真雷达应用软件的运行环境,可用于设计、调试应用软件,还实现了对雷达软件的功能及性能测试,提高了机载雷达软件的质量。
关键词 雷达计算机 机载雷达 软件 软件测试
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机械工程测试技术实验教学改革的实践与体会 被引量:7
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作者 李运红 张习加 李占贤 《实验室科学》 2011年第5期24-26,共3页
针对实验教学中存在的问题,对实验内容、设备以及实验教学模式进行了一系列的改革,建立了基于虚拟仪器的测控实验室,为学生提供了一个开放式、综合性、设计性测试实验场所。通过教学实践表明,这一改革使学生的综合能力、创新能力等方面... 针对实验教学中存在的问题,对实验内容、设备以及实验教学模式进行了一系列的改革,建立了基于虚拟仪器的测控实验室,为学生提供了一个开放式、综合性、设计性测试实验场所。通过教学实践表明,这一改革使学生的综合能力、创新能力等方面得到了培养和提高。 展开更多
关键词 机械工程测试技术实验 实验教学改革 DRVI虚拟仪器 多媒体教学
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Experimental investigation of power output and soot emission for micro-emulsification diesel oil using for vehicle 被引量:2
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作者 韩大明 李美成 +3 位作者 吴保国 韩宁 吴勃生 李少岩 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2008年第4期525-527,共3页
The micro-emulsification diesel oil with water dopant of 5%, 10% and 15% was prepared using the NAA micro-emulsification compound developed by the authors. The engine bench testing was carried out on the 485QB diesel ... The micro-emulsification diesel oil with water dopant of 5%, 10% and 15% was prepared using the NAA micro-emulsification compound developed by the authors. The engine bench testing was carried out on the 485QB diesel engine. From the testing results of velocity, loading and exhaust gas, it can be seen that the power decreases and the fuel consumption increases using the micro-emulsification diesel oil. But based on the actual fuel consumption, the use of emulsification diesel with water dopant of 10% can get the effect of oil saving; while with water donant of more than 15% , it doesnt work evidently. The investigation shows that using the micro - emulsification diesel oil, we can reduce the exhaust gas pollution and receive better environment benefit. 展开更多
关键词 micro-emulsification diesel oil power outnut soot emission engine bench testing
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Optimization of technical measures for improving high-temperature performance of asphalt-rubber mixture 被引量:2
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作者 Chuan Xiao Tianqing Ling Yanjun Qiu 《Journal of Modern Transportation》 2013年第4期273-280,共8页
Asphalt-rubber pavements often become dam-aged in high-temperature regions and appear rutted or wavy, and experience slippage. To improve the high-temperature performance of the asphalt-rubber mixture, technical measu... Asphalt-rubber pavements often become dam-aged in high-temperature regions and appear rutted or wavy, and experience slippage. To improve the high-temperature performance of the asphalt-rubber mixture, technical measurements, such as, the optimal adjustment of gradation, technique of composite modification, and control of compaction were investigated. An optimal adjustment of aggregate gradation based on stone matrix asphalt improves the high-temperature stability of the asphaltrubber mixture significantly. Through composite modifi- cation, the effect of asphalt-rubber modification was enhanced, and the dynamic stability and relative defor- mation indices of the asphalt-rubber mixture were improved significantly. Furthermore, compaction parame- ters had a significant influence on the high-temperature stability of the asphalt-rubber mixture. The rolling times for compacting the asphalt-rubber mixture should be controlled to within 18-20 round-trips at a molding temperature at 180℃; if the rolling time is a 12 round-trip, the compaction temperature of the asphalt-rubber mixture should be controlled between 180 and 190℃. 展开更多
关键词 Road engineering test Asphalt-rubber mixture performance Optimization Laboratory High-temperature
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Preparation and Characterization of Zireonia Oxygen Sensors
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作者 罗志安 肖建中 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第4期612-616,共5页
A thimble zirconia oxygen sensor electrolyte and their interface were observed with was prepared with YSZ. The surfaces of the Pt electrode, a scanning electron microscope (SEM).The sensor was examined with engine b... A thimble zirconia oxygen sensor electrolyte and their interface were observed with was prepared with YSZ. The surfaces of the Pt electrode, a scanning electron microscope (SEM).The sensor was examined with engine bench test to evaluate the essential performance. The basic function such as electromotive force output and response time was discussed. The oscillograph trace was also obtained and analyzed with four different frequencies. The experimental results reveal that the oxygen sensor has high performances meeting the demands of practical applications.. 展开更多
关键词 zirconia oxygen sensor engine bench test performance characterization
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精密基准源的ATE测试开发
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作者 周建中 张莉 《电源技术应用》 2014年第5期37-39,共3页
根据LM199精密直流电压基准源基于自动测试系统的工程实践,阐述解决问题的思路和方法。同时根据被测器件的特点,改进测试方法,利用脉冲供电预热器件,提高了测试效率。
关键词 自动测试工程 精密直流电压 LM199 间接测量 脉冲供电
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Influence studyof flow separation on the nozzle vibration response 被引量:1
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作者 Geng Li Qin Liu +1 位作者 Xuequn Han Yunqiang Guo 《Propulsion and Power Research》 SCIE 2016年第2期108-117,共10页
In the present paper,the vibration response difference of the upper stage nozzlewith higher expansion ratio between ground and altitude simulation hot-firing test is analyzed.lt indicates that the acceleration respons... In the present paper,the vibration response difference of the upper stage nozzlewith higher expansion ratio between ground and altitude simulation hot-firing test is analyzed.lt indicates that the acceleration response of the nozzle under ground hot-firing test is muchhigher than that of the altitude condition.In order to find the essential reason,the experimentaland numerical simulation studies of the flow separation are developed by using the test enginenozzle.The experimental data show that the nozzle intemal flow occurred flow separation andthe divergence cone intemal wall pressure pulsation increased significantly downstream fromthe separation location.The numerical simulation and experimental results indicate that theincrease of internal wall pressure and turbulence pulsating pressure are the substantial reason ofvibration response increasing aggravatingly during the ground firing test. 展开更多
关键词 Solid rocket motor Flow separation Oscillation response Spectrum analysis test engine nozzle
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Model-Based Embedded Compiled Software Fault Positioning
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作者 LIU Jinshuo CHEN Jian +2 位作者 ZHANG Weixin XU Xiangyang YAN Jingjing 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2017年第3期263-268,共6页
Software fault positioning is one of the most effective activities in program debugging. In this paper, we propose a model-based fault positioning method to detect the faults of embedded program without source code. T... Software fault positioning is one of the most effective activities in program debugging. In this paper, we propose a model-based fault positioning method to detect the faults of embedded program without source code. The system takes the machine code of embedded software as input and translates the code into high-level language C with the software reverse engineering program. Then, the static analysis on the high-level program is taken to obtain a control flow graph(CFG), which is denoted as a node-tree and each node is a basic block. According to the faults found by the field testing, we construct a fault model by extracting the features of the faulty code obtained by ranking the Ochiai coefficient of basic blocks. The model can be effectively used to locate the faults of the embedded program. Our method is evaluated on ST chips of the smart meter with the corresponding source code. The experiment shows that the proposed method has an effectiveness about 87% on the fault detection. 展开更多
关键词 code reverse engineering model-based test fault positioning
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