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Start Over Author "Song, Jing" Journal advanced materials research
50 results on '"Song, Jing"'

1. Visual Modeling and Simulation of Plant Leaves

Author

Yi Neng Chen, De Hong Ding, Kui Fang, and Song Jing

Subjects
business.industry, OpenGL, General Engineering, Leaf water, Edge detection, Quadratic equation, Computer vision, Visual modeling, Artificial intelligence, L-system, Biological system, business, Mathematics, B spline curve
Abstract

Based on the original image of plants leaves, the edge detection method will be used to extract the geometrical morphology of leaves. The characteristic points of the contour can be calculated by Harris method. The contours of plant leaves is constructed by the quadratic B-spline interpolating curve, the leaf vein is generated by L system. The simulation of plant leaves is realized in OpenGL.

Published
2013

2. Study on Public-Private Partnerships Financing Structure in Hydropower Project

Author

Song Jing Wang and Min Zhu

Subjects
Finance, Safeguard, Energy development, business.industry, Return on investment, General Engineering, Cash flow, business, China, Hydropower, Stock (geology), Renewable energy
Abstract

The hydropower, as the renewable energy, the development strategy of which is the important part of China’s whole energy development strategy in the 12th Five-Year Plan. The insufficient capital injection of government is the main restriction factor of the hydropower development. The paper introduces the Public-Private-Partnerships (PPP) theories and practices, combining with the situations of China’s tight financing policies, sufficient private capital stock and so on, analyses the main problems on China’s hydropower financing and then builds the PPP structure to solve the problems, expounds the advantages, supports and safeguard measures of PPP structure. The paper puts forward the ideas that considering the hydropower project is quasi commonweal infrastructure, it is necessary for the governments to give rational compensation or Taxes and dues preferential policies to the SPC in order to guarantee stable cash flow and reasonable return on investment.

Published
2012

3. Visualization of Flow-Field between the Flapper and Nozzle in a Hydraulic Servo-Valve

Author

Song Jing Li, Sheng Zhuo Zhang, and Jacob M. Mchenya

Subjects
Flow visualization, Engineering, business.industry, Nozzle, General Engineering, Mechanical engineering, Video camera, Electrohydraulic servo valve, law.invention, Vortex, Visualization, Flow (mathematics), law, Stage (hydrology), business, Simulation
Abstract

In order to understand the mechanism and get rid of the high-frequency self-excited noise in a hydraulic servo-valve, in this paper, the flow field distribution in the pilot stage of a hydraulic flapper-nozzle servo-valve is investigated. An assembly is prepared representing the construction and working principle of the flow field inside the pilot stage of a hydraulic flapper-nozzle servo-valve. A method of visualization is developed by taking videos for the flow field inside the transparent assembly with a high speed video camera. In this study, at different inlet pressure the high speed video camera was utilized for flow visualization together with computer-assisted image measurement. The shape of the jet flow, the cavitations and vortex flow inside the flow field can be visualized clearly. The proposed method enables to analyze the flow-field in the pilot stage of a hydraulic flapper-nozzle servo-valve by giving useful information for better design.

Published
2011

4. Depression of Self-Excited Pressure Oscillations and Noise in the Pilot Stage of a Hydraulic Jet-Pipe Servo-Valve Using Magnetic Fluids

Author

Song Jing Li, Jing Hui Peng, Sheng Zhuo Zhang, and Jacob M. Mchenya

Subjects
Jet (fluid), Materials science, Torque motor, Oscillation, Astrophysics::Instrumentation and Methods for Astrophysics, General Engineering, Mechanics, equipment and supplies, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Electrohydraulic servo valve, Magnetic field, Computer Science::Robotics, Physics::Fluid Dynamics, Quality (physics), Control theory, Magnetic pressure, Physics::Atomic Physics, human activities, Noise (radio)
Abstract

Magnetic fluid (MF) shows an increased saturation magnetization when exposed to a magnetic field. In order to improve the quality of servo-valve products by depressing and overcoming the self-excited high-frequency pressure oscillations and noise appearing in pilot stage of a hydraulic servo-valve, application of magnetic fluid in a hydraulic servo-valve is developed in this paper. Large damping can be introduced by the magnetic fluids into the servo-valve if magnetic fluids are filled into the working gaps of the hydraulic servo-valve torque motor. After the construction and working principle of a hydraulic servo-valve with magnetic fluids are introduced, the high-frequency pressure oscillation signals are tested and recorded when magnetic fluids are applied or not in the servo-valve. Experimental results are compared and analyzed by using FFT analysis method. It is shown that pressure oscillations of the servo-valve are depressed when magnetic fluids are applied.

Published
2011

49. Study of the Fouling Characteristics of Arc Pipe Based on Principal Component Analysis and Partial Least Squares

Author

Song, Jing Dong and Wen, Xiao Qiang

Abstract

An experimental platform of arc pipe was built to measure the corresponding parameters of fouling and the equation of fouling characteristics was built based on principal component analysis and partial least squares, in which there are several input variables such as input and output temperature, wall temperature, flow rate and so on, and there is only one output variables—fouling resistance. In order to compare with the five-input-variables equation, the six-input-variables equation was also built. The prediction results show the model built in this paper is reasonable and feasible.

Published
2012
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50. Electrochemical Promotion Catalytic Oxidation of NO over Mn/TiO2 and Mn-Fe Catalyst

Author

Song, Jing Hao, Tang, Xiao Long, Yi, Hong Hong, Ning, Ping, Li, Kai, Yu, Qiong Fe, and He, Dan

Abstract

A new type electrochemical reactor was designed for electrochemical promotion catalytic oxidation of NO, which was a flat-plate fixed-bed reactor. The experimental results showed that the process of NO catalytic oxidation could be promoted though this electrochemical reactor with Mn/TiO2 and Mn-Fe, which were two kinds of selected catalysts for NO oxidation. Approximately 70% NO could be converted to NO2 at 50 ℃ when the input voltage of electrochemical reactor was 0.5v. Moreover, the reaction rates can be adjusted with the input voltage varying.

Published
2011
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