Deposition Thickness Detection Method based on Dust Distribution Law of Ventilation Dust Removal Pipeline

2019 ◽  
Author(s):  
Zheng Zhao ◽  
Guoqing Liu ◽  
Dewen Li
Keyword(s):  
Detection Method ◽  
Dust Removal ◽  
Distribution Law ◽  
Deposition Thickness ◽  
Dust Distribution

Wall-Attachment Fan Drum Enclosed Dust Removal Theory and Technology of Mechanized Working Face

2013 ◽  
Vol 807-809 ◽  
pp. 653-662
Author(s):  
Wei Min Cheng ◽  
Yun Wang ◽  
Gang Zhou ◽  
Hao Wang
Keyword(s):  
Ventilation System ◽  
Simple Algorithm ◽  
Field Application ◽  
Dust Removal ◽  
Distribution Law ◽  
Two Phase ◽  
Suppression Effect ◽  
Working Face ◽  
Dust Distribution ◽  
Removal System

FLUENT software and SIMPLE algorithm which was based on parity grid was used to carry out the numerical simulation of spraying dust gas-particle two-phase flow field of the mechanized working face with a single pressure pumping hybrid ventilation system. The dust distribution law of the mechanized working face was mastered and the main dust prevention area was determined to be the middle of the roadway and wall-attachment fan drum enclosed dust removal system of mechanized working face was also planned to be established according to the simulation result. It had been proved that fully-mechanized coal winning machine enclosed dust removal system had a large advantage in reducing dust by computer simulation and field application, the dust suppression effect was remarkable.

Simulation of Wind Speed in Campus Based on FLUENT

2013 ◽  
Vol 671-674 ◽  
pp. 2631-2635
Author(s):  
Yu Jin Chao ◽  
Xiao Mei Hu ◽  
Tao Yu
Keyword(s):  
Wind Speed ◽  
Air Pollutants ◽  
Three Dimensional ◽  
Urban Surface ◽  
Optimized Design ◽  
Three Dimensional Model ◽  
Distribution Law ◽  
Surface Dust ◽  
Fluent Software ◽  
Dust Distribution

In order to study urban surface dust distribution, a three-dimensional model is proposed and the distribution of wind and the distribution law of air pollutants are researched. 3D campus of Shanghai University as a typical area is selected. The standard height (Twenty two meters) of teaching building for reference has been chosen. In different distances such as Eight、Twelve、Fifteen、Twenty meters, the amount and distribution of wind speed were obtained from simulation using FLUENT software. Combined with the particulate of air pollution’s distribution in urban surface, the optimized design of the main campus’s building spacing is analyzed. The results show that when the building space is about Fifteen meters, the concentration of pollutants and the distribution of wind speed is optimized.

Solid-phase immunoelectron microscopy for rapid diagnosis of enteroviruses

1984 ◽  
Vol 42 ◽  
pp. 226-227 ◽  
Author(s):  
K. Pegg-Feige ◽  
F. W. Doane
Keyword(s):  
Electron Microscopy ◽  
Cell Culture ◽  
Immunoelectron Microscopy ◽  
Detection Method ◽  
Solid Phase ◽  
Protein A ◽  
Plant Viruses ◽  
Rapid Diagnosis ◽  
Virus Diagnosis ◽  
Antiviral Antibody

Immunoelectron microscopy (IEM) applied to rapid virus diagnosis offers a more sensitive detection method than direct electron microscopy (DEM), and can also be used to serotype viruses. One of several IEM techniques is that introduced by Derrick in 1972, in which antiviral antibody is attached to the support film of an EM specimen grid. Originally developed for plant viruses, it has recently been applied to several animal viruses, especially rotaviruses. We have investigated the use of this solid phase IEM technique (SPIEM) in detecting and identifying enteroviruses (in the form of crude cell culture isolates), and have compared it with a modified “SPIEM-SPA” method in which grids are coated with protein A from Staphylococcus aureus prior to exposure to antiserum.

A Fault Detection Approach Based on Sound Signal Analysis for Equipment Monitoring

2020 ◽  
pp. 129-139
Author(s):  
Weihai Sun ◽  
Lemei Han
Keyword(s):  
Fault Detection ◽  
Signal Analysis ◽  
Energy Analysis ◽  
Detection Method ◽  
Sound Signal ◽  
Practical Significance ◽  
Time Frequency ◽  
Detection Approach ◽  
Machine Fault ◽  
Learning Data

Machine fault detection has great practical significance. Compared with the detection method that requires external sensors, the detection of machine fault by sound signal does not need to destroy its structure. The current popular audio-based fault detection often needs a lot of learning data and complex learning process, and needs the support of known fault database. The fault detection method based on audio proposed in this paper only needs to ensure that the machine works normally in the first second. Through the correlation coefficient calculation, energy analysis, EMD and other methods to carry out time-frequency analysis of the subsequent collected sound signals, we can detect whether the machine has fault.

Development and Application of Quality Control System for Highway Subgrade Construction

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Detection Method ◽  
System Development ◽  
Effective Control ◽  
Construction Process ◽  
Development Mode ◽  
The Road ◽  
Whole Process

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.

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