After 40 years of water flooding development, Putaohua oil formation of Xingshugang oil field had already entered the stage of high water cut, and the comprehensive water cut has been more than 92%. Not only the distribution relationship of oil and gas becomes more complex, but also the fluid property...

Many factors that affect the safety behavior of miners, it mainly focus on four major aspects of the accident caused by personal behavior factors, operating environment, equipment and facilities, economic benefits and so on. The principal component analysis method and factor analysis method are used...

This paper presents the intrinsic fluorescence characteristics of vitamin B1, B2 and B6 measured with 3D fluorescence Spectrophotometer. Three strong fluorescence areas of vitamin B2 locate at ?ex/?em=270/525nm, 370/525nm and 450/525nm, one fluorescence area of vitamin B1 locates at ?ex/?em=370/460nm,...

This paper presents the theoretical and experimental performance of MR-deDuster as an axial entry multi-cyclone system. Collection efficiency and pressure drop across the unit were measured under various operational conditions of inlet velocity and dust loading. Two different diameters of vortex finder...

This paper presents breakdown test of Polyvinyl chloride hard (PVC), Polymethyl methacrylate (PMMA) under non-uniform electric field in transformer oil. PVC and PMMA are placed between point-plate electrodes. The result of the experiment shows that the breakdown voltage of point-plate electrodes is lower...

The liner of a high speed combustion chamber is subjected to high thermo-mechanical loads. Active cooling of the high speed combustor liner by using hydro carbon fuel is seen as a viable option due to its weight efficiency. But choice of the channel configuration has to be optimum. Two channels shape...

Damaged rolling contact bearings generate vibration. These vibrations may be measured and separated from other vibrations in a machine to analyze and interpret the condition of the bearings and other associated problems. The envelope technique is used to measure the magnitude or energy distribution of...

The surface chemistry of anisotropic etching of p-type Si-wafer (400) is reviewed and the anisotropic chemical etching of silicon in alkaline solution using wetting agent were discussed. The main factors which affect the production of silicon dioxide layer on crystalline silicon as a result of wet alkali...

In modern cities, power distribution systems are very complicated systems consisted of 3-phase lines, 3-phase transformers, electric poles, etc. and those facilities are distributed among lots of buildings, roads, and trees. Tracing technology of transformers and wires is a challenging issue. Power line...

The corona discharge of EHV transmission lines in high altitude area is very serious. Based on the Jiantang-Yulong 500kV power transmission project, we using Ansys software to calculate the surface electric field of 500 kV double circuit AC transmission line insulator and fittings. We get the voltage...

This experiment used high-efficiency, wide-coverage and long-range power sprayers to spray pesticide solution during the later stage of rice growth. It measured the quantity of pesticide sediment, then analyzed and studied the distribution pattern of pesticide sediment on the rice plants and the sediment...

Traditional forms of Hydraulic Clamping System is applied in the Automatic Machining System of machine tool in the past , however its defects are obviously such as relatively complex speed control circuit , large loss of pressure keeping and so on. Aiming at these defects in this paper puts forward a...

In this paper, the parameter estimation of thermal dynamic discrete-time system for heating, ventilating and air conditioning (HVAC) is studied using recursive least square method. Parameters are estimated by using recursive least square method. Thermodynamic model of indoor test bed is formulated by...

At first, this article summarizes several methods of the current multi-robot formation control and introduces the basic idea of formation control algorithm based on leader-follower. Then the control algorithm is introduced into switching control process (the forming of the initial formation, maintenance...

In order to research the torque converter lockup process and improve the quality, the lockup process system of Electronic Automatic Transmission is analyzed. The lockup process is analyzed detailed and the rule of lockup process is gotten and at the same time the rule of clutch fill-time/ramping off...

In this study I-V characteristic, temperature dependence of resistivity, thermopower, were investigated for thin films on the basis of Ge2Sb2Te5 doped by Bi. Resistivities, ratio of the resistivities of amorphous and crystalline states, activation energies of conductivity, temperature of phase transition,...

This paper investigates a method to locate important facial feature points with small training samples. Firstly, the facial feature points are divided into several categories, then these various feature points are trained by LMBP neural network to get each sub-network. Outputs of these sub-networks can...

Article briefly describes the application of CFD simulation technique and experimental validation in the development, improvement and optimization of flotation machine, meanwhile the paper designs an injector used for compound flotation machine according to working principle. The conical injector with...

In order to solve the problem of low-frequency vibration isolation, a new vibration isolator with quasi-zero-stiffness characteristic was designed and the relationship among design parameters was analyzed. Dynamic behavior was calculated based on harmonic balance method and simulation of the vibration...

Electric inertia unit can have an impact on electromagnetic force generated by induced current through regulating the value of load resistance. The electromagnetic force can be precisely controlled to restraint the motion of the piston. The proper electric inertia unit for the Free-piston linear alternator...

In the social life, people often face a wide range of scheduling problems, such as appraisal of excellence, race rankings. These are often hot and sensitive issues, so the research of this type of problems has practical and economic value. But due to socio-cultural diversity and pluralism of values,...

Human thirst for exploring their body's internal structure for a long time, but it was the invention of CT and MRI technology which appeared until in 1970, that made the desire of people exploring the internal data of their bodies come true. And the basic method so-called chromatography imaging rely...