Liaoning Institute of Science and Technology

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Xiaoshi, China

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Ling L.,Liaoning Institute of Science and Technology
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2017

The composition and working principle of variable speed constant frequency doubly fed wind power generation system is discussed in this thesis. On the basis of theoretical analysis and control on the modeling, the doubly fed wind power generation simulation control system is designed based on a TMS320F2407 digital signal processor (DSP), and has done a large amount of experimental research, which mainly include, variable speed constant frequency, constant pressure, Grid connected control experiment. The running results show that the design of simulation control system is reasonable and can meet the need of experimental research. © 2017 SPIE.


Liu X.-H.,Liaoning Institute of Science and Technology | Zhang G.-J.,Liaoning Institute of Science and Technology
Journal of Iron and Steel Research | Year: 2012

The production of materials saving products such as Longitude Profile Plates (LP plate) and Tailor Rolled Blanks (TRB) needs to solve the problem of the calculation of variable gauge rolling (VGR) parameters. For this reason, differential equations of force equilibrium for both upwards rolling and downwards rolling were built by means of analyzing the force equilibrium relationship on a micro slab inside the deformation zone, that is to say VGR equation. The effect of rolls rigid displacement velocity v y was considered during the derivation. Besides , Karman differential equation of force equilibrium for common rolling was proved to be a special case of VGR equations when v y = 0. The VGR equation provides a base for theoretical research on VGR parameters.


Wang X.G.,Liaoning Institute of Science and Technology
Applied Mechanics and Materials | Year: 2014

To investigate the settlement deformation of subgrades, we used fractal theory and soil section technology to study the original foundation soil, and soils filled with 4%, 8%, 12%, 16%, 20% and 24% of A material. The results show that under consolidation pressure of 500 KPa and after one dry-wet circulation, the fractal dimension was 1.7 in the original soil, 1.78 in the soil filled with 4% A material, and 1.93 in the soil filled with 24% A material. Along with the increased dopant amount of A material, the fractal dimension of soil mass gradually increased, but after the dopant amount reached 24%, the increasing rate was very slow. With the increased addition of A material, the compression deformation gradually weakened, but after the dopant amount reached 24%, the changing rate was very small. We derived a prediction model between the dopant amount at a certain particle size and the fractional dimension. This model can be used to predict the dopant amount at a certain size. The reasonableness of this model when using single size was validated via engineering practice. © (2014) Trans Tech Publications, Switzerland.


E Y.S.,Liaoning Institute of Science and Technology
Advanced Materials Research | Year: 2014

Fluorene is a basic chemical raw material, which has wide applications.This paper introduces the current fluorene technology of extration and purification from wash oil. Use the after-cut of wash oil as raw material, get fluorene by distillation and solvent crystallization. The content of fluorene is higher than 97%.The total yield is 72.24%, which is higher than current domestic production levels. © (2014) Trans Tech Publications, Switzerland.


Wu Y.D.,Liaoning Institute of Science and Technology
Advanced Materials Research | Year: 2014

The paper evaluate asphalt modified effects by PPA.The relationship of performance is compared between SBS modified asphalt and modified asphalt with different proportion SBS and different proportion PPA by tests such as the Penetration, Softening point, Ductility, viscosity and performance index of after aging RTFOT and after aging PAV. Results showed that 4%SBS and 1.5% PPA modified asphalt binder provided road performance as well as 5%SBS only binder. It is remarkable effect for improving road performance of PPA modified asphalt on high temperature, anti-aging, storage stability. © (2014) Trans Tech Publications, Switzerland.


Tong Y.,Liaoning Institute of Science and Technology
Applied Mechanics and Materials | Year: 2012

The thesis introduces a new design for liquid mixing system, which can replace the liquid mixing system based on the PLC or numerous meters. The fact proves the new design have lower cost, smaller volume, higher control accuracy and quick response. © (2012) Trans Tech Publications, Switzerland.


Zhang Y.,Liaoning Institute of Science and Technology
Applied Mechanics and Materials | Year: 2014

This paper discusses the effect of pole-slot combination as well as phase number on performance of PM generator direct-driven by wind turbine, on these basis, based on the equivalent circuit model, 3MW and 78poles and 324slots permanent magnet generator direct-driven is designed. The characteristics of the permanent magnet generator direct-driven under condition of no load and rated load are analyzed by means of coupled field-circuit method. The simulation and experiment results show that the designed permanent magnet generator direct-driven is feasible in wind power generation. © (2014) Trans Tech Publications, Switzerland.


Chen Y.G.,Liaoning Institute of Science and Technology
Applied Mechanics and Materials | Year: 2014

Converter gas has plenty of heat energy and its recycle is very meaningful. The paper introduces the classical gas recycle outline. The system mainly consists of the converter and electrical control unit. The electrical control unit employs different devices to get rid of the moisture or dust and PLC and analyzers to accomplish gas recycle. © (2014) Trans Tech Publications, Switzerland.


Li R.S.,Liaoning Institute of Science and Technology
Applied Mechanics and Materials | Year: 2014

Due to the high ground fault resistance and the complexity of power distribution network structure(such as too many nodes, branches and too long lines), adopting common traveling wave method and ac injection method can not effectively locate the single-phase grounding fault in the distribution network system.To solve above problems and determine the position of the point of failure prisely, this paper adopted the dc location method of injecting the dc signal from the point of failure under the power outage offline. This paper introduces the single phase dc method and the method of three phase dc, and the simulation shows that the dc location method is effective and feasible. © (2014) Trans Tech Publications, Switzerland.


Zhou X.,CAS Shenyang Institute of Metal Research | Zhou X.,Liaoning Institute of Science and Technology | Yang H.,CAS Shenyang Institute of Metal Research | Wang F.,CAS Shenyang Institute of Metal Research
Corrosion Science | Year: 2012

A pentaerythritol glycoside (PG) was synthesized and then its corrosion inhibition for carbon steel in 3.5% NaCl saturated Ca(OH)2 solution was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), as well as atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). Results indicated that the PG compound acted as an anodic inhibitor by strong chemical interaction with the carbon steel surface according to the Langmuir adsorption isotherm. The inhibition efficiency and pitting potential on carbon steel increased with increasing concentrations of the inhibitor. Zero charge potential measurements and quantum chemical calculations provided insight into the inhibition mechanism, which are discussed. © 2011 Elsevier Ltd.

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