Application of the Pulse Electro-Osmosis Technology in the Control of Seepage of the Underground Structure

2011 ◽  
Vol 255-260 ◽  
pp. 752-756 ◽  
Author(s):  
Jiang Miao Zhu ◽  
Zhi Xin Li ◽  
Ying Wang ◽  
Ran Li
Keyword(s):  
Electric Pulse ◽  
Underground Structure ◽  
Pulse Signal ◽  
Economic Loss ◽  
Production Engineering ◽  
Safety Hazard ◽  
Construction Engineering ◽  
Water Seepage ◽  
Potential Safety ◽  
Electro Osmosis

The water seepage of underground structure is the serious problem in the construction engineering, and becomes one of the most harm in current infrastructure with the huge potential safety hazard and economic loss. The electro-osmosis technology is once widely used in the fields of soft ground stabilization of rock engineering, the biological pharmacy and the oil production engineering in China. This paper referred experiences of overseas, combined electric pulse signal and the electro-osmosis technology to reduce seepage of the underground structure, and solved underground structure water seepage problems. The paper comprehensively analyzed the research status of the technology at home and abroad and its feasibility in theory, also introduced the general implementation methods of projects, and carried on the comparison of the pulse electro-osmosis technology and the traditional moisture-proof technology in application.

scholarly journals A Hybrid Temporal-Spatio Forecasting Approach for Passenger Flow Status in Chinese High-Speed Railway Transport Hub

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Zhengyu Xie ◽  
Limin Jia ◽  
Yong Qin ◽  
Li Wang
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Distribution Center ◽  
Railway Transport ◽  
High Speed Railway ◽  
Safety Hazard ◽  
Passenger Flow ◽  
Potential Safety ◽  
Correlation Degree ◽  
The Status

With the rapid development of high-speed railway in China, high-speed railway transport hub (HRTH) has become the high-density distribution center of passenger flow. In order to accurately detect potential safety hazard hidden in passenger flow, it is necessary to forecast the status of passenger flow. In this paper, we proposed a hybrid temporal-spatio forecasting approach to obtain the passenger flow status in HRTH. The approach combined temporal forecasting based on radial basis function neural network (RBF NN) and spatio forecasting based on spatial correlation degree. Computational experiments on actual passenger flow status from a specific bottleneck position and its correlation points in HRTH showed that the proposed approach is effective to forecast the passenger flow status with high precision.

Simulation of New Wet Duster’s Nozzle Based on Fluent

2014 ◽  
Vol 556-562 ◽  
pp. 1133-1135
Author(s):  
Shan Shan Tang ◽  
Kai Song Wang ◽  
Chao Kun Wei ◽  
Teng Fei Ma
Keyword(s):  
3D Model ◽  
Water Pressure ◽  
Cone Angle ◽  
Wind Pressure ◽  
Safety Hazard ◽  
Field Simulation ◽  
Working Surface ◽  
Potential Safety ◽  
Normal Work ◽  
Nozzle Structure

Overweight of dust concentration is a common problem happened in most coal mine that not only affects workers’ normal work ,but also brings a great potential safety hazard to mine.New wet duster’ operating principle is that wind pressure and water pressure which generated in working surface pipeline network go through the nozzle jet and produce negative pressure leading the dust into dust catching pipe, and then the dust removed.According to optimizing the nozzle structure can increase spray’s cone Angle inside the shower nozzle,then the dust removal ability will be improved.The paper built the nozzle’ 3D model and the water’ the river basin model in SolidWorks ,then meshed them in Gambit and finally analysis the pressure and nozzle size’s influence on fluid’s pressure and velocity with Fluent’s flow field simulation.

A Method for Substation Equipment Temperatue Prediction

2014 ◽  
Vol 631-632 ◽  
pp. 580-584
Author(s):  
Qian Zhao ◽  
Yong Qian Li ◽  
Tian Li
Keyword(s):  
Time Series ◽  
Bp Neural Network ◽  
Power Transmission ◽  
Prediction Method ◽  
Power Transmission Line ◽  
Equipment Failure ◽  
Safety Hazard ◽  
Potential Safety ◽  
Temperature Forecasting ◽  
Substation Equipment

The temperature change of the power transmission line and substation equipment can reflect their potential safety hazard caused by their aging and overload. Based on the nonlinear analysis of forecasting substation equipment temperature data can realize effectively early warning of equipment failure and avoid huge losses caused by the accident. This paper puts forward a method for temperature forecasting, based on the chaotic time series and BP neural network. It collects data from wireless temperature sensors to establish a time series of substation equipments’ temperature. Software simulation results showed that the prediction method has higher prediction accuracy than that of the traditional method.

Study on Locating a Master Station of Gas Station

2014 ◽  
Vol 505-506 ◽  
pp. 894-897
Author(s):  
Bing Su ◽  
Na Jia ◽  
Yang Xu ◽  
Xin Feng Cheng
Keyword(s):  
Genetic Algorithm ◽  
Theoretical Basis ◽  
Safety Hazard ◽  
Gas Stations ◽  
Decision Points ◽  
Potential Safety ◽  
Master Station ◽  
Gas Station

Gas station has a potential safety hazard, which would affect lives and property security of residents around it, once an accident occurs, it needs to be rescued immediately. We focus on locating a master station of gas station from the perspective of rescue, add a class of decision points (rescue points) and take rescue costs after the accident into consideration. The model for location is established, and show genetic algorithm for computing it. This provides a theoretical basis for relevant departments planning gas stations location.

The Fatigue Life Analysis of Prestressed Wire-Wound Super-High Pressure Vessel Based on ANSYS

2014 ◽  
Vol 552 ◽  
pp. 8-14 ◽  
Author(s):  
Jun Fei Wu ◽  
Jun Bin Lan ◽  
Kai Hu ◽  
Qing Ling Li
Keyword(s):  
High Pressure ◽  
Fatigue Life ◽  
Pressure Vessel ◽  
Design Theory ◽  
Safety Hazard ◽  
Fatigue Design ◽  
Potential Safety ◽  
Fatigue Life Analysis ◽  
Winding Wire ◽  
Bearing Structure

With the the development of super-high pressure technology such as the super-high biological treatment processing, the wire-wound prestressed vessel was widely used as the main pressure bearing structure. It’s proved that the stress was well-distributed along thickness direction and the carrying capacity was improved comparing with traditional pressure vessel. But the deign of wire-wound pressured vessel so far only checks out the fatigue strength margin of winding wire according to the design theory, and lacking of fatigue design of inner cylinder could causes potential safety hazard. So a stress analysis was carried out for prestressed wire-wound vessel with the help of ANSYS, and the fatigue life of the whole prestressed vessel was validated by means of theoretical calculation and the Fatigue Tool .

scholarly journals Vibration Control on Multilayer Cable Moving through the Crossover Zones on Mine Hoist

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Xia Peng ◽  
Xian-sheng Gong ◽  
Jin-jun Liu
Keyword(s):  
Differential Geometry ◽  
Friction Coefficient ◽  
Crossing Over ◽  
Central Angle ◽  
Safety Hazard ◽  
Deep Mine ◽  
Analysis Study ◽  
Potential Safety ◽  
Severe Shock ◽  
Mine Hoist

Mine hoist is an important piece of equipment in mine hoist systems, and we achieve deep mine hoist through the multilayer winding, but the cable always undergoes severe shock and vibration during the winding process, and the dynamic load and wear would greatly reduce the lifetime of the cable and cause potential safety hazard. In this paper, we start from the course of crossing over of winding cable, use the methods of differential geometry, mechanics, and mathematical analysis, study the movements of the crossover, and derive the important formula that can reduce the vibration of cable during the course of crossover: the formula about central angle of the crossover arc. The results display that four factors contribute to central angle of the crossover arc, that is, the gap of the rope grooves, friction coefficient of the cable, and diameter of the drum and the cable. The result can provide valuable information for designing multilayer winding mine hoist.

scholarly journals Spatiotemporal visibility characteristics impacted by forest and land fire over airports in sumatera and borneo Island, Indonesia

2019 ◽  
Vol 38 (3) ◽  
pp. 5-16 ◽  
Author(s):  
Heri Ismanto ◽  
Hartono Hartono ◽  
Muh Aris Marfai
Keyword(s):  
Severity Index ◽  
Spatiotemporal Analysis ◽  
Safety Hazard ◽  
Flight Operations ◽  
Weather Model ◽  
Time Period ◽  
Potential Safety ◽  
Low Visibility ◽  
Severity Class ◽  
Very High

AbstractSmoke can reduce the airport’s visibility and is related to the aviation safety and efficiency. Low visibility has potential safety hazard, such GA-152 crashed in 1997, and thus there is a need to find out the visibility characteristics in airports over Sumatra and Borneo Island caused by 2015 forest fire. This research aims to analyse the spatiotemporal visibility characteristics over airports in Sumatera and Borneo Island using flight rule visibility below minima criteria and hazard probability. The analysis of smoke was characterized using visibility severity index (VSI) that is a function of visibility severity class and its probability level. Spatiotemporal analysis of severity index combined with hotspot and wind numerical weather model indicates that the worst impact visibility occurred in September and October 2015. The lowest visibility was occured over night until afternoon time period. The spread of VSI impact has a tendency to northward and northwestward. The very high VSI levels occurred at airports such: WIJJ (Jambi), WIBB (Pekanbaru), WAGG (Palangkaraya) which were impacted up to 70% of flight operations time with IFR visibility below minima; while the WIOS (Susilo-Sintang), which operates only on VFR, experienced about 92% of VFR visibility below minima at smoke climax period.

Research on Wireless Monitoring System of Gypsum Mine Goaf Based on LabVIEW

2014 ◽  
Vol 608-609 ◽  
pp. 281-285 ◽  
Author(s):  
Hai Na Zhang ◽  
Yuan Hao Liu ◽  
Xuan Zhou ◽  
Gao Feng Ren
Keyword(s):  
Monitoring System ◽  
Programming Language ◽  
Virtual Instrument ◽  
Wireless Transmission ◽  
Sensor Technology ◽  
Failure Characteristics ◽  
Safety Hazard ◽  
Wireless Monitoring ◽  
Potential Safety ◽  
Instrument Technology

According to the gypsum mine goaf disaster formation mechanism and failure characteristics, wireless monitoring system of gypsum mine goaf was designed successfully by using virtual instrument technology, modern sensor technology, wireless transmission technology and the LabVIEW programming language. By using high-precision sensors to acquire dynamical data of monitoring projects, combined with wireless transmission technology to realize the automatic wireless real-time telemetry, using the graphical programming language LabVIEW to develop a software with friendly interface and convenient operation, the monitoring system can timely reflect the dynamic changes of the goaf and forecast the potential safety hazard, to ensure the safety in production of gypsum mine.

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