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Dandan H.,Liaoning Institute of Science and Technology
International Journal of Simulation: Systems, Science and Technology | Year: 2015

As the computer technology improves rapidly, the scale of software has increased greatly, which makes it more and more difficult to find a bug in software. As a result, the enhancement of software quality and reliability has become an important task in the field of software engineering. Test is an important step that guarantees software quality and reliability. We put forward a novel multi-objective optimization scheme based on improved multi-objective particle swarm optimization. Then software test case optimization method is investigated based on proposed multi-objective particle swarm optimization. The experiment results show that the proposed software test case optimization method has high efficiency. © 2015, UK Simulation Society. All rights reserved. Source

Guo Z.,University of Electronic Science and Technology of China | Lu D.,Liaoning Institute of Science and Technology | Shao F.,Northeastern University China
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2012

Image reconstruction for electrical capacitance tomography (ECT) is an inherently nonlinear and ill-posed inverse problem. Reconstruction methods based on a linear approximation are widely adopted. The relation between the nonlinear degree of measured capacitances versus permittivity distribution and the gradient of the sensitivity distribution function was explored, and the gradient magnitude of the sensitivity was used for sensitivity normalization process to improve the fidelity of the linear approximation. Then, a new sensitivity normalization model based on the difference of the sensitivity was proposed, which combines both parallel and series normalization models to construct the normalized sensitivity matrix according to the central difference of the sensitivity, and it gains better linear approximation model of image reconstruction. Numerical experiments were given to compare the difference among the three sensitivity normalization models, the features of sensitivity associated with the difference models were discussed. The results show that to construct normalization sensitivity matrixes with the new method instead of conventional ones, the reconstruction performance of those conventional iterative algorithms using sensitivity maps, such as Landweber iteration method and iterative Tikhonov regularization (ITR), is improved significantly without increasing computational burden. © 2012 Chin. Soc. for Elec. Eng. Source

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. Source

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. Source

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. Source

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