Liaoning Petrochemical Vocational and Technology College

Jinzhou, China

Liaoning Petrochemical Vocational and Technology College

Jinzhou, China
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Chen M.,Liaoning University of Technology | Xu J.,Liaoning Petrochemical Vocational and Technology College | Xin L.,Liaoning University of Technology | Zhao Z.,Liaoning University of Technology | And 3 more authors.
Optics and Lasers in Engineering | Year: 2017

This paper experimentally investigates the relationship between laser keyhole characteristics on the porosity formation during pulsed laser-GTA welding of magnesium alloy. Based on direct observations during welding process, the influences of laser keyhole state on the porosity formation were studied. Results show that the porosities in the joint are always at the bottom of fusion zone of the joint, which is closely related to the keyhole behavior. A large depth to wide ratio always leads to the increase of porosity generation chance. Keeping the keyhole outlet open for a longer time benefits the porosity restriction. Overlap of adjacent laser keyhole can effectively decrease the porosity generation, due to the cutting effect between adjacent laser keyholes. There are threshold overlap rate values for laser keyholes in different state. © 2017 Elsevier Ltd


Wu H.,Liaoning Petrochemical Vocational and Technology College | Yan S.,China Institute of Technology | Yi D.,China Institute of Technology
Liaoning Gongcheng Jishu Daxue Xuebao (Ziran Kexue Ban)/Journal of Liaoning Technical University (Natural Science Edition) | Year: 2010

A 3D aluminum alloy wheel hub is normally modeled using UG tool in CAD software. In this study, the wheel hub models with different sizes and shapes are constructed using center plate's thickness and the angle between two plates as variables. With the analysis on FEM calculation results, the optimal ranges for center plate's thickness and the angle between two plates are found. The study demonstrates that the method can shorten design cycle and reduce cost.


Chen M.,Liaoning University of Technology | Xu J.,Liaoning Petrochemical Vocational and Technology College | Xin L.,Liaoning University of Technology | Zhao Z.,Liaoning University of Technology | Wu F.,Liaoning University of Technology
Optics and Lasers in Engineering | Year: 2016

This paper describes an investigation on differences in interactions between laser and arc plasma during laser-gas tungsten arc (LT) welding and laser-gas metal arc (LM) welding. The characteristics of LT heat source and LM heat source, such as plasma behavior, heat penetration ability and spectral information were comparably studied. Based on the plasma discharge theory, the interactions during plasma discharge were modeled and analyzed. Results show that in both LT and LM welding, coupling discharge between the laser keyhole plasma and arc happens, which strongly enhance the arc. But, the enhancing effect in LT welding is much more sensitive than that in LM welding when parameters are adjusted. © 2016 Elsevier Ltd. All rights reserved.


Ma W.,Liaoning University of Technology | Geng D.,Liaoning University of Technology | Yan Y.,Liaoning Petrochemical Vocational and Technology College
International Journal of Innovative Computing, Information and Control | Year: 2012

Single intersection in the traffic system is a complex system which has the nonlinear and uncertain characteristics. If the traffic states in the single intersection become more complex, the traditional timing control of the traffic lights is not suitable for the traffic control. A multi-phase fuzzy controller of the single intersection is proposed in this paper, by using the integration of the multi-phase control, and incorporating genetic algorithm into fuzzy control design to optimize fuzzy membership functions. The proposed control method is suitable for the different traffic states in the different times, and can achieve satisfactory control performance. The simulation experiment is implemented to prove the effectiveness of the proposed multi-phase fuzzy controller. ©2012 ICIC International.


Hou H.-J.,Liaoning Petrochemical Vocational and Technology College | Gao Q.-M.,Liaoning Petrochemical Vocational and Technology College
Advanced Materials Research | Year: 2012

With the development of science and technology, especially the development of computer technology, visual technology on the base of digital image processing technology provides the means of observation for the medical objective. On the other hand, the computer aided design and computer aided manufacturing which are widely used in mechanical processing industry provide the effective method for complex shape precision machined. This image recognition software is designed mainly aimed at conformal lead mould CAD/CAM system, and it is the part of the system. The result of the final implementation is that target area edge data is outlined in a single pixel extracted from the form and is stored in the form of text style file. © (2012) Trans Tech Publications, Switzerland.


Yi S.,Liaoning Petrochemical Vocational and Technology College
Advanced Materials Research | Year: 2014

The effect of different concentrations of Pr on the microstructure and tensile properties of cast Al-18 wt.%Mg2Si in situ metal matrix composite was investigated. The results show that the addition of proper amount of Pr has significant modification effect on primary Mg2Si in the Al-18 wt.% Mg2Si composite. With the increase of Pr content from 0.1 to 0.7%, the morphology of primary Mg2Si is changed from irregular or dendritic to polyhedral shape, and its average particle size is significantly decreased from 65 to 17 μm. When the Pr content exceeds 1.0%, the primary Mg2Si become coarse again. Tensile tests reveal that the Pr addition improves the tensile strength and ductility of the material. Comparing with those of unmodified composite, the ultimate tensile strength and percentage elongation with 0.7% Pr are increased by 36.5% and 161.6%, respectively. © (2014) Trans Tech Publications, Switzerland.


Ma W.,Liaoning University of Technology | Yan Y.,Liaoning Petrochemical Vocational and Technology College | Geng D.,Liaoning University of Technology
ICIC Express Letters | Year: 2010

In view of actual traffic status of China and the typical intersection layout, to research the optimizing algorithm of signal timing of urban intersection is based on realtime mixed traffic volume under 2∼6 changeable phases. Firstly, according to an examined directional traffic flows, short-term traffic flow is forecasted with unified method of the artificial intelligence and the forecast model. Then, ant colony algorithm is used to carry on the dynamic timing to optimize isolated. This model becomes more adaptability on intersection control. It can reduce delay measurements, and enhance traffic capacity. © 2010 ICIC International.


Ma W.,Liaoning University of Technology | Yuan Q.,Liaoning University of Technology | Yan Y.,Liaoning Petrochemical Vocational and Technology College
ICIC Express Letters, Part B: Applications | Year: 2012

This paper designs new algorithms optimization of fuzzy control system. On the basis of multi-phase adaptive fuzzy controller, we use ant colony algorithm and genetic algorithm to optimize the fuzzy control rules and membership functions separately, in order to reduce the number of control rules and adjust membership functions constantly to adapt the variations of traffic condition. The simulation proved that this design adapts to the complex traffic environment and reduces traffic delays effectively. © 2012 ICIC International.


Yan Y.,Liaoning Petrochemical Vocational and Technology College | Ma W.,Liaoning University of Technology
ICIC Express Letters | Year: 2012

In this paper, a new two-direction green wave band coordinate fuzzy control strategy is proposed to solve current congested situation of the urban arterial traffic. This strategy can make the up-run and down-run vehicle keep running without stop in the arterial streets, and thus the two-direction green wave was formed, which can reduce parking rate and average delay time of the vehicle. The public cycle, the offset and the green ratio are derived in this paper. The factual application results show that the strategy performs well. © 2012 ISSN 1881-803X.


Wang X.G.,Northeastern University China | Jin Y.J.,Liaoning Petrochemical Vocational and Technology College | Zhang Y.M.,Northeastern University China
Applied Mechanics and Materials | Year: 2013

Under continuous cutting conditions, the reliability of alumina-based ceramic cutting tool's wear life with abrasion wear was discussed extensively. An ultimate state equation of alumina-based ceramic cutting tool's wear life was proposed according to stress-strength interference theory. Based on the premise that the probability distribution of random parameters has been known, the fracture toughness KIC and the hardness H which obey Weibull distribution were transformed into normal distribution by means of the equivalent normal distribution method, and then the reliability of alumina-based ceramic cutting tool's wear life was analyzed by saddle point approximation method. The probability density function and cumulative distribution function of the ultimate state equation were accurately and quickly obtained by way of saddle point approximation, as a result, the saddle point approximation method was proved accurate with high computing speed in comparison with the Monte-Carlo method. Therefore, the application of the saddle point approximation method developed the reliability analysis theory of alumina-based ceramic cutting tool's wear life. © (2013) Trans Tech Publications, Switzerland.

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