LIAONING Technical University
Fuxi, China

Liaoning Technical University is located in Fuxin, Liaoning, China, administered by the provincial government and State Administration of Work Safety. Wikipedia.

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Zhang X.,Dalian University of Technology | Zhang X.,LIAONING Technical University | Wang X.,Dalian University of Technology
Signal Processing | Year: 2013

An embedded partial encryption technique of compressed color images based on chaos is proposed. Modifying the bit values of different types which are obtained by Color-SPIHT (CSPIHT) compression algorithm leads to varying degradation degree of retrieved images. This signifies that the six bit types have various contributions to decoding. As long as the most important bits that have the greatest contribution are encrypted, we can ensure no information leaking out and minimal computation. The piecewise linear chaotic map (PWLCM) is appropriate for generating random number sequence used in proposed cryptosystem for its perfect ergodicity and confusion. Thorough performance and security analysis as regards to diverse evaluation metrics ascertains that the scheme has less computational amount than 0.49%, resists against common cryptanalytic attacks, and preserves the scalability property of the encoder. © 2013 Elsevier B.V. All rights reserved.

Cai C.,Central South University | Gao Y.,LIAONING Technical University | Gao Y.,University of Calgary
GPS Solutions | Year: 2013

A combination of GPS and GLONASS observations can offer improved reliability, availability and accuracy for precise point positioning (PPP). We present and analyze a combined GPS/GLONASS PPP model, including both functional and stochastic components. Numerical comparison and analysis are conducted with respect to PPP based on only GPS or GLONASS observations to demonstrate the benefits of the combined GPS/GLONASS PPP. The observation residuals are analyzed for more appropriate stochastic modeling for observations from different navigation systems. An analysis is also made using different precise orbit and clock products. The performance of the combined GPS/GLONASS PPP is assessed using both static and kinematic data. The results indicate that the convergence time can be significantly reduced with the addition of GLONASS data. The positioning accuracy, however, is not significantly improved by adding GLONASS data if there is a sufficient number of GPS satellites with good geometry. © 2012 Springer-Verlag.

Li Z.-X.,LIAONING Technical University
Meitan Xuebao/Journal of the China Coal Society | Year: 2010

Based on the problem of ventilation network expressing in 3D ventilation work of coal mine when the foreign gas emits (gas emission, fire, etc.), proposed the concept of active ventilation network, established the mathematical model which was based on active ventilation network. The model and conversion method of the point source and line source of air source were given. Compiled with the MATLAB for active ventilation network simulation computer program referred to as TFM. Through the simulation of ventilation system two examples of gas emission and gas outburst, the results still meet three basic laws: the balance of air volume, pressure balance and ventilation resistance.

In the current practice, to determine the safety factor of a slope with two-dimensional circular potential failure surface, one of the searching methods for the critical slip surface is Genetic Algorithm (GA), while the method to calculate the slope safety factor is Fellenius' slices method. However GA needs to be validated with more numeric tests, while Fellenius' slices method is just an approximate method like finite element method. This paper proposed a new method to determine the minimum slope safety factor which is the determination of slope safety factor with analytical solution and searching critical slip surface with Genetic-Traversal Random Method. The analytical solution is more accurate than Fellenius' slices method. The Genetic-Traversal Random Method uses random pick to utilize mutation. A computer automatic search program is developed for the Genetic-Traversal Random Method. After comparison with other methods like slope/w software, results indicate that the Genetic-Traversal Random Search Method can give very low safety factor which is about half of the other methods. However the obtained minimum safety factor with Genetic-Traversal Random Search Method is very close to the lower bound solutions of slope safety factor given by the Ansys software. © 2014 Wen-jie Niu.

Zhang Y.-J.,LIAONING Technical University
Physica A: Statistical Mechanics and its Applications | Year: 2011

It is known that the thermal conductivity of a dilute gas can be derived by using kinetic theory. We present here a new derivation by starting with two known entropy production principles: the steepest entropy ascent (SEA) principle and the maximum entropy production (MEP) principle. A remarkable feature of the new derivation is that it does not require the specification of the existence of the temperature gradient. The known result is reproduced in a similar form. © 2011 Elsevier B.V. All rights reserved.

Niu W.-J.,LIAONING Technical University
Civil Engineering and Urban Planning 2012 - Proceedings of the 2012 International Conference on Civil Engineering and Urban Planning | Year: 2012

The confined aquifer within irregular water boundary can not be evaluated with Dupuit equation. This paper intends to determine the water heads in a confined aquifer within irregular boundary when a single well is pumping water with an approximated solution and a full implementation in a numerical code. This paper also intends to give more information of the precision of the approximated analytical solution. Results indicate that the proposed equivalent analytical solution is reasonable when the pumping rate Q is very little. However when pumping rate increases to a certain value, the proposed equivalent analytical solution is not applicable. © 2012 ASCE.

Xiujie L.,LIAONING Technical University
International Journal of Digital Content Technology and its Applications | Year: 2012

Equipment quality management integrated plan is a planning management job of systemic, synthetically, competitive and comprehensive characteristic. It deals with equipment quality management total process integration (demonstrate phase, manufacture and production phase, trial and appraisal phase, use and support phase, retire and scrap phase), total hierarchy integration (stratagem level, battle level and tactics level), total member integration (military unit, supplier and consultation institution).Firstly, actuality of equipment quality management system must be fully considered at present. Secondly, differences and relations between quality planning and quality management planning must be recognized. Thirdly, solving equipment quality management problems must be regarded as the study goal. Hence, this paper establishes equipment quality management integrated plan model based on the total system and life-cycle equipment quality management idea, and presents the new mode of equipment quality management planning.

Zhang Y.-J.,LIAONING Technical University
Physica A: Statistical Mechanics and its Applications | Year: 2012

It is known that the viscosity of a dilute gas can be derived by using kinetic theory. We present here a new derivation by using two entropy production principles: the steepest entropy ascent (SEA) principle and the maximum entropy production (MEP) principle. The known result is reproduced in a similar form. © 2012 Elsevier B.V. All rights reserved.

Wang X.-B.,LIAONING Technical University
Journal of Mechanics of Materials and Structures | Year: 2010

A new method for predicting the peak temperature evolution in the adiabatic shear band (ASB) of steel is proposed to overcome the drawback of the traditional method's underestimation of the peak temperature in the ASB. The average shear strain of a thin-walled tube in torsion is divided into three parts: the elastic shear strain, the average plastic shear strain outside the ASB, and the average plastic shear strain of the ASB. The relation between the shear stress acting on the tube and the average shear strain of the tube is established. The postpeak shear stress-average shear strain curve of the ASB is found to be dependent on the gage length. As an example, the shear stress-average plastic shear strain curve of the ASB is backcalculated from the measured shear stress-average shear strain curve of an AISI 1018 cold rolled steel tube. The peak temperature and average temperature in the ASB are calculated and compared with the experimental result. It is found that the calculated peak temperature is closer to or slightly higher than the experimental result. The latter is a satisfactory result due to the underestimated peak temperature in the ASB in experiments. © 2010 Mathematical Sciences Publishers.

Wang X.-B.,LIAONING Technical University
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2011

Based on the expression proposed by WANG for the local plastic shear deformation distribution in the adiabatic shear band (ASB) using gradient-dependent plasticity, the effects of 10 parameters on the adiabatic shear sensitivity were studied. The experimental data for a flow line in the ASB obtained by LIAO and DUFFY were fitted by use of the curve-fitting least squares method and the proposed expression. The critical plastic shear strains corresponding to the onset of the ASB for Ti-6Al-4V were assessed at different assigned ASB widths. It is found that the proposed expression describes well the non-linear deformation characteristics of the flow line in the ASB. Some parameters in the JOHNSON-COOK model are back-calculated using different critical plastic shear strains. The adiabatic shear sensitivity decreases as initial static yield stress, work to heat conversion factor and strain-rate parameter decrease, which is opposite to the effects of density, heat capacity, ambient temperature and strain-hardening exponent. The present model can predict the ASB width evolution process. The predicted ASB width decreases with straining until a stable value is reached. The famous model proposed by DODD and BAI only can predict a final stable value. © 2011 The Nonferrous Metals Society of China.

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