搜索结果: 1-15 共查到“工学 leakage”相关记录21条 . 查询时间(0.093 秒)
WATER LEAKAGE DIAGNOSIS IN METRO TUNNELS BY INTERGRATION OF LASER POINT CLOUD AND INFRARED THERMAL IMAGING
Tunnel Infrared Thermal Imaging Laser Scanning Intensity Data Water Leakage Diagnosis
2018/5/16
Diagnosis of water leakage in metro tunnels is of great significance to the metro tunnel construction and the safety of metro operation. A method that integrates laser scanning and infrared thermal im...
Practical Leakage-Resilient Pseudorandom Objects with Minimum Public Randomness
Practical Leakage-Resilient Pseudorandom Objects Minimum Public Randomness
2016/1/23
One of the main challenges in leakage-resilient cryptography is to ob-tain proofs of security against side-channel attacks, under realistic assumptions and for efficient constructions. In a recent wor...
GIS-Based Toxic-Gas-Vessel Leakage, Dispersion and Simulations
Decision Support Systems Modeling Simulation Toxic-Gas Dispersion
2015/12/17
People have been becoming serious of more and more accidents of toxic-gas-vessel leakage and dispersion (TLD) recently. This paper describes a TLD model derived from Gaussian instantaneous leakage mod...
A spatial-spectral approach for visualization of vegetation stress resulting from pipeline leakage
pipeline hydrocarbon vegetation
2015/8/20
Hydrocarbon leakage into the environment is a major problem with large economic and environmental impacts. Traditional methods for
investigating seepage and pollution, such as drilling, are time cons...
Quantitative risk assessment model of hazardous chemicals leakage and application
Quantitative risk assessment Risk identification,Influence range Probability calculation Loss calculation Acceptable risk level
2012/3/19
The hazardous chemical accidents remain a matter of major concern. However, there is a dearth of practical measures about the emergency management of hazardous chemicals leakage. Therefore, in order t...
Characteristics of Leakage Pollution of Longpan Road Gas Station and Its Enlightenment
Gas Stations Leakage Contamination Geological Penetrating Radar Nanjing
2013/3/11
Geological penetrating radar combined with drilling and chemical analysis has been applied to investigate leakage pollution of Longpan Road gas station in Nanjing, China. The results indicate that rad...
Research on Leakage Detection and Analysis of Leakage Point in the Gas Pipeline System
Leakage Detection Transient Simulation Leakage Location SCADA
2013/1/28
Recently, with large-scale use of natural gas and massive constructions of gas pipelines, more and more public concern is focused on pipeline leakage. The leakage caused by holes on gas pipelines gene...
多级离心泵叶轮级间泄漏对轴向力的影响（Influence of Interstage Leakage on the Axial Force of the Multistage Centrifugal Pump）
多级离心泵 叶轮 级间泄漏
2010/12/29
理论分析了叶轮级间泄漏对叶轮前后盖板外侧腔体内液体流动状态的影响，指出轴向力的实际大小与计算值之间存在着差异。通过离心泵轴向力试验装置，对液流速度分布和轴向力进行了试验，研究结果表明：叶轮前后盖板外侧腔体内液体并不是以叶轮0.5倍的角速度进行运转，前盖板外侧大于0.5倍，后盖板外侧小于0.5倍；叶轮两侧的压力分布不一致，前盖板外侧压力小，后盖板外侧压力大；轴向力计算值小于实际轴向力，应对行业应用的...
Octagonal Large-Mode-Area Leakage Channel Fiber with Reduced Bending Loss
Fiber design and fabrication Fiber properties Lasers fiber Photonic crystal fibers
2015/6/10
We investigate a novel design for high-power large-mode-area leakage channel fibers(LCFs) with a single octagonal dual-diameter air-hole ring encircling a nine-cell pure-silica core,having a tenfold d...
高压直流阀冷系统漏水检测功能的改进（Improvement of Leakage Detection in Valve Cooling System for HVDC Transmission Systems）
高压直流输电 阀冷系统 漏水检测
2010/8/17
分析了南方电网中3回高压直流输电系统中的阀冷系统漏水检测与保护功能，发现均存在一定设计漏洞，装置有可能因此出现误动和拒动，建议在天广直流系统以及高肇直流系统的阀冷控制系统中增加判据，使之功能更完善。
Modeling of Pipeline Leakage Detection and Prewarning System for Locating Error Analysis Based on Jones Matrix
Pipeline leakage detection Coherence optics Fiber vibration sensor
2009/8/4
The detecting and locating principle of the distributed optical fiber pipeline leakage detecting and prewarning system is proposed in this paper. In allusion to gross error which often occurred in th...
Research on Recognition Algorithm of Offshore Oil Pipeline Defect Inspection Based on Magnetic Flux Leakage Method
Magnetic flux leakage Pipeline inspection WBF neural network Multiresolution
2009/7/24
Pipeline safety evaluation is an important issue in the industry. Based on magnetic flux leakage (MFL) method, this paper presents an automated inspection device to inspect pipeline defects, analyzes...
Three-dimensional Finite Element Analysis of Magnetic Flux Leakage Signals Caused by Transmission Pipeline Complex Corrosion
Finite element analysis Magnetic flux leakage Non destructive testing
2009/7/24
The most commonly used and cost effective method of transmission pipeline non destructive testing (NDT) utilizes the magnetic flux leakage (MFL) technique. The corrosion pits occur in many and comple...
Automatic Data Acquisition System for Offshore Oil Pipeline Magnetic Flux Leakage On-line Inspection
Pipeline inspection Magnetic flux leakage Adaptive filter Data compression
2009/7/24
In order to assure the safety of oil pipeline transmission, it is very important to continue routine inspection of offshore pipelines to identify defects or corrosions as early as possible. A high-sp...
Influence of Corrosion Products on Magnetic Flux Leakage Signals in Inspection of Far-side Metal-loss Defects in Oil Storage Tank Bottom Floors
Non-destructive testing Magnetic leakage field Oil storage tank
2009/7/24
Magnetic flux leakage testing (MFLT) is a reliable inspection method for far-side metal loss type flaws. Corrosion products of ferromagnetic substances are generated in wet environments, so may affe...