Research on Flow Measurement Technology in the Field Test of Pumping Station Engineering

2013 ◽  
Vol 475-476 ◽  
pp. 75-81
Author(s):  
Jian Gang Feng ◽  
You Wei Xu
Keyword(s):  
Field Test ◽  
Flow Measurement ◽  
Measurement Technology ◽  
Measuring Instruments ◽  
Pumping Station ◽  
Key Factor ◽  
Working Principle ◽  
Main Basis ◽  
Technical And Economic Indicators ◽  
Selection Of

Pumping station engineering field test is the main basis of pumps technical renovation and the assessment of technical and economic indicators. Flow measurement is a key content of pumping station in the engineering field test. How to choose a reliable and applicable, economic and effective measurement method and measuring instruments is the key factor of success for flow measurement. In this paper, starting from the characteristics of pumping station engineering field test technology, to research it in three aspects .They are the method of flow measurement classification, working principle and characteristics of common measuring instruments, measurement methods and the selection of instruments and equipment. It also analyzes the different types of pumping station flow measurement technologies in engineering field test, and makes some explanation combined with typical examples pumping station project flow measurement.

scholarly journals Procedure for the Selection of Rubber Compound in Rubber-Metal Springs for Vibration Isolation

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1737
Author(s):  
Milan Banić ◽  
Dušan Stamenković ◽  
Aleksandar Miltenović ◽  
Dragan Jovanović ◽  
Milan Tica
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Vibration Isolation ◽  
Correct Selection ◽  
Virtual Experiment ◽  
Rubber Compound ◽  
Key Factor ◽  
Railway Engineering ◽  
Selection Of

The selection of a rubber compound has a determining influence on the final characteristics of rubber-metal springs. Therefore, the correct selection of a rubber compound is a key factor for development of rubber-metal vibration isolation springs with required characteristics. The procedure for the selection of the rubber compound for vibration isolation of rubber-metal springs has been proposed, so that the rubber-metal elements have the necessary characteristics, especially in terms of deflection. The procedure is based on numerical simulation of spring deflection with Bergström-Boyce constitutive model in virtual experiment, with a goal to determine which parameters of the constitutive model will lead to spring required deflection. The procedure was verified by case study defined to select rubber compound for a rubber–metal spring used in railway engineering.

The Technical Development for Increasing ROP with Particle Impact Drilling in China

2014 ◽  
Vol 904 ◽  
pp. 292-295 ◽  
Author(s):  
Jian Zhao ◽  
Yi Ji Xu
Keyword(s):  
Field Test ◽  
Hard Rock ◽  
Rock Breaking ◽  
Particle Impact ◽  
Sound Effect ◽  
Deep Well ◽  
Working Principle ◽  
Hard Formation ◽  
Field Test Result ◽  
Test Result

Field test of particle impact drilling (PID) technology was firstly carried out in deep well and hard formation in Sichuan province china on Oct. 2013. The test formation was named Xu Jiahe, which was very difficult to penetration. Field test result shows that the ROP (rate of penetration) was nearly doubled by this technology. It indicates that there is a profound application prospect of particle impact drilling, especially for hard rock formation. In this paper, the equipment and working principle was analyzed. The experiment and simulation results showed that the rock breaking efficiency was highly increased by this technology. The details of this field test were presented too in this paper that proved the sound effect of PID.

Research and Application of High-Efficiency Multi-Cyclone Dust Removal

2011 ◽  
Vol 109 ◽  
pp. 400-404
Author(s):  
Yan Hong Yang ◽  
Da Fu Ni
Keyword(s):  
Structural Design ◽  
High Efficiency ◽  
Dust Removal ◽  
Working Principle ◽  
Selection Of

Performance and working principle of high-efficiency multi-cyclone were analyzed, and the structural design shortage of original high-efficiency multi-cyclone was pointed out. Its structure was researched and designed, including determination of setting chamber and pipe number, selection of material and the design of cyclones.

scholarly journals Selection of Adequate Species for Degraded Areas by Oil‐Exploitation Industry as a Key Factor for Recovery Forest in the Ecuadorian Amazon

2016 ◽  
Vol 27 (7) ◽  
pp. 1771-1780 ◽  
Author(s):  
Jaime Villacís ◽  
Cristina Armas ◽  
Susana Hang ◽  
Fernando Casanoves
Keyword(s):  
Oil Exploitation ◽  
Ecuadorian Amazon ◽  
Key Factor ◽  
Selection Of

scholarly journals SURVEYING IN THE STUDIES OF THE STABILITY OF EARTHY CONSTRUCTIONS, FOCUS ON SELECTED HISTORICAL MOUNDS IN KRAKOW (POLAND)

2016 ◽  
Vol 22 (2) ◽  
pp. 324-341
Author(s):  
Rafał Gawałkiewicz ◽  
Anna Szafarczyk
Keyword(s):  
Landslide Monitoring ◽  
Measurement Technology ◽  
Degree Of Deformation ◽  
Soil Creep ◽  
Measurement Series ◽  
Efficient Protection ◽  
The Stability ◽  
The Impact ◽  
Measurement Base ◽  
Selection Of

Mounds, as anthropogenic constructions of a very delicate structure, are subdued to constant changes, which, due to the impact of external factors (prolonged precipitation, tremors) are subdued to deformations in the form of mass movements. These phenomena usually have the character of mild soil creep in time and sometimes, as a result of rapid loss of stability, they are seriously damaged by landslide. This phenomenon causes temporary exclusion of the object from use. In the framework of the protection of these objects, the maintenance was carried out within the preventive measures referring to the construction and surveying monitoring of the geometry changes in time, as a result of phenomena taking place in the ground medium under the influence of environmental factors causing strains. The process of the deformation of mounds is similar to the characteristic, according to the Terzagie's theory. The application of surveying technologies of high precision allows the monitoring of changes in their geometry in time. The properly defined study area and the proper selection of measurement technology in the aspect of the accuracy of the prediction of changes, can efficiently help in defining the scale of deformations in the decisive process referring to the way of efficient protection of barrows. The article presents the results of point monitoring carried out with surveying technologies within 11 measurement series carried out on the selected measurement base of the Wanda Mound. The use of measurement technologies of integrated and specialist software, allows complex assessment of the degree of deformation and the trends of these changes in time, as well as identifying anomaly zones in the framework of the landslide monitoring.

The Techniques of Flow Measurement

1982 ◽  
Vol 15 (12) ◽  
pp. 458-463 ◽  
Author(s):  
R. S. Medlock
Keyword(s):  
Flow Rate ◽  
Flow Measurement ◽  
Volumetric Flow Rate ◽  
Large River ◽  
Scientific Basis ◽  
New Techniques ◽  
Flow Metering ◽  
The Subject ◽  
Selection Of

Flow measurement has a long history extending over a period of about 3000 years, but it was only just over 200 years ago that the subject was first studied on a scientific basis and it was only 20 years ago that a surge of new techniques became available. Today there is a wide selection of methods and equipment to enable flow to be measured whether the medium is in the form of a liquid, gas, vapour or solid, or any combination thereof. According to the application, volumetric flow rate can be measured over a range exceeding 10−5m3/h to 106m3/h which in everday terms is equivalent to a cupful per day to the flow of a very large river. The price of a flowmeter can be as small as a few pounds or in excess of £1 million depending on the accuracy and capacity required. References are made to about 50 types of flow metering devices which can be classified into 11 groups.

scholarly journals Why We Go Where We Go: Profiling User Decisions on Choosing POIs

2020 ◽  
Author(s):  
Renjun Hu ◽  
Xinjiang Lu ◽  
Chuanren Liu ◽  
Yanyan Li ◽  
Hao Liu ◽  
...  
Keyword(s):  
Key Factors ◽  
Real World Data ◽  
Decision Factors ◽  
Point Of Interest ◽  
Learning Factor ◽  
Poi Recommendation ◽  
Key Factor ◽  
Selection Of ◽  
Decision Structures

While Point-of-Interest (POI) recommendation has been a popular topic of study for some time, little progress has been made for understanding why and how people make their decisions for the selection of POIs. To this end, in this paper, we propose a user decision profiling framework, named PROUD, which can identify the key factors in people's decisions on choosing POIs. Specifically, we treat each user decision as a set of factors and provide a method for learning factor embeddings. A unique perspective of our approach is to identify key factors, while preserving decision structures seamlessly, via a novel scalar projection maximization objective. Exactly solving the objective is non-trivial due to a sparsity constraint. To address this, our PROUD adopts a self projection attention and an L2 regularized sparse activation to directly estimate the likelihood of each factor to be a key factor. Finally, extensive experiments on real-world data validate the advantage of PROUD in preserving user decision structures. Also, our case study indicates that the identified key decision factors can help us to provide more interpretable recommendations and analyses.

Comparison and Selection of Different Types of Boiler Soot-Blowers

2014 ◽  
Vol 1008-1009 ◽  
pp. 934-937 ◽  
Author(s):  
Xiu Yan Wang ◽  
Ye Xuan Chen
Keyword(s):  
Different Types ◽  
Primary Means ◽  
Working Principle ◽  
Application Scope ◽  
Selection Of

The application of soot-blower is the primary means for solving the fouling and slagging of coal-fired boilers. And appropriate soot-blowing will greatly improve the efficiency of boilers. Therefore, selecting the appropriate type of soot-blower is surely important. This paper analyzes the working principle, technical characteristics, and application scope of steam soot-blowers, gas pulse shock soot-blowers, acoustic soot-blowers and air shock soot-blowers which are common in boilers. It raises a proposal that different types of soot-blowers should be used in different positions of boilers.

The envelope method in the problem of choosing a rational composition of measuring instruments

2021 ◽  
pp. 68-72
Author(s):  
Il'ya A. Meshchikhin ◽  
Sergej S. Gavryushin
Keyword(s):  
Mathematical Model ◽  
Monitoring Systems ◽  
Measuring Instruments ◽  
Key Points ◽  
Envelope Method ◽  
Loaded State ◽  
The Mathematical Model ◽  
Selection Of ◽  
Rational Composition

As part of the development of monitoring systems for the operation of technical objects, the problem of improving the quality of monitoring systems for the loaded state is considered. Based on the analysis of the mathematical model of the structure and its loading, a methodology for the selection of measuring instruments was developed. The urgency of the problem of calculating substantiation of the choice of key points of the structure is shown, at which it is possible to measure deformations for the subsequent restoration of the existing loads with maximum accuracy. An approach based on the envelope method for determining the rational composition of measuring instruments for restoring the loads acting on the structure is stated.

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