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Tangshan, China

Hebei Polytechnic University is a university in Hebei, China under the provincial government. The university currently has about 30,000 students and about 800 faculty members.Hebei Polytechnic University is situated in Tangshan, a rapidly developing city closed to Beijing, Tianjin within Bohai Economic Rim. It is a comprehensive university which specializes in engineering technology, science as backbone and develops humanities and social science as supplements. The current enrolment contains overseas students, postgraduates, undergraduates and adult students. It has 900 teachers with about 138 professors and 350 associate professors. More than 60% teachers have postgraduate qualifications . The university consists of 17 departments, 1 teaching section. The university offers undergraduate courses in 46 areas and two of them are provincial key disciplines.In recent years, many teaching achievements of the university have gained public acclaim. These achievements include: more than 40 Excellent Teaching Results Award of Hebei Province; more than 20 provincial Excellent Courses Since 2000, the university has undertaken more than 500 research projects, among which more than 32 research projects have reached international and national level, about 200 ranked foremost in China. The university's researchers have gained a lot of scientific awards of all kinds. In 2004, the university has undertaken 5 projects of National Natural Science Commission, 1 national level project.The university thinks highly of the communication with national and international organizations. It often invites guest lecturers from other countries. Every year, experts and young teachers from the university are sent to visit universities abroad. The university has actively explored various possibilities to run schools jointly and has established cooperative relationships with several foreign universities, such as the Leeds University in Britain, the University of Missouri, the Tokyo University in Japan,the South Australia University, the Adelaide Secondary School of English in Australia and the Universidade Federal de Ouro Preto in Brazil. Such exchanges with educational organizations abroad highly increased the university's quality and level of education. Wikipedia.

Zhang Y.-B.,Hebei Polytechnic University | Liu S.-J.,Northeastern University China
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

The hole rock is selected as a spesimen, and the thermal infrared radiation variation features of hole rock are experimentally studied in the process of loading by using uniaxial loading system and thermal imager, as well as combining the numerical simulation. It is revealed that the distribution of compression stress and tension stress on hole rock are symmetrical, which results in the symmetrical distribution of thermal image. The surface radiation temperature in tension stress area decreases and the radiation temperature in compression stress area increases. There is a fine corresponding relation between stress field and infrared radiation temperature field. In the later period of loading, rock appears fractures and the radiation temperature on shearing fracture is increasing; but the radiation temperature on the position of tension fracture is almost not changed. The fracturing type is closely related to the infrared radiation temperature variation. The rock fails finally along the shearing fracture; and the temperature-increase strip is the important infrared precursor of rock fracture and destabilization. The experimental results indicate again that the thermal imaging technology can detect the stress and catastrophe of rock.

An L.,Hebei Polytechnic University
Advanced Materials Research | Year: 2011

In this paper, the parameter optimization problem for multi-pass turning operations is studied. A mathematical model based on the minimum production cost criterion is developed. The unwanted material is removed by one finishing pass and at least one roughing passes depending on the total depth of cut. Maximum and minimum allowable cutting speeds, feed rates and depths of cut, as well as tool life, surface roughness, cutting force and cutting power consumption are constraints of the model. Optimal values of machining parameters are found by three methods: integer programming, nonlinear programming, and genetic algorithms. An example is presented to illustrate the effectiveness of the optimization model and solution methods. The model generates lower unit production costs compared with the results from the literature and machining data handbook. © (2011) Trans Tech Publications, Switzerland.

Chen J.,Hebei Polytechnic University
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011 - Proceedings | Year: 2011

The credibility of system simulation models has a direct influence on its reliability, security and combination property, and dynamic consistency test of validating simulation models is a hotspot and difficulty in the fields of system simulation. According to the results of comparison analysis of three main test methods, namely Theil's Inequality Coefficient method (TIC), spectrum analysis method and distance test method, it can be concluded that distance test method can realize quantitative test and has no limitation for test data in the time domain, and reach a high credibility of test results. At the same time, the comparison conclusion is beneficial to choosing rational methods for concrete simulation results and giving advices for forming national standards in the future. © 2011 IEEE.

Xie S.-M.,Hebei Polytechnic University
Advances in Intelligent and Soft Computing | Year: 2012

In this paper, we have proposed a new method based on genetic algorithms and the learning by partial injection of sequences for solving the Flexible Job-shop Scheduling Problem (FJSP). Computational experiments show that the AGAIS (II) algorithm outperforms the performance of the AGAIS (I). In fact, the AGAIS (II) gives better solutions than AGAIS (I) in a reasonable computation time. © 2012 Springer Science+Business Media Dordrecht.

Wang L.,Henan Polytechnic University | Li S.-B.,Hebei Polytechnic University
Gongcheng Lixue/Engineering Mechanics | Year: 2011

The study of damage pattern growth in brittle materials is of fundamental importance for understanding the gestation mechanism and the occurrence conditions of catastrophe in some key project constructions. It is especially important in understanding the dynamic catastrophe in rock, such as seismic, rock burst, and the three kinds of outburst which are the outburst of water, gas and coal in coal underground mining. A great many studies showed that the mechanism of formation of the dynamics catastrophe in rock can be explained in the same mode that irreversible evolution of damage in material induces catastrophe in structure. So the study of the growth of damage pattern is a great important method to understand the course of gestation and occurrence of the catastrophe, and the simulation of growth of damage pattern is a good way to demonstrate the course of gestation and occurrence of the catastrophe. In the paper, damage pattern growth in a 2-D sample of quasi-brittle material is simulated, which is based on the principle that the damage evolution is irreversible, and the lattice finite element is used for the numeric model. The simulation displayed that the damage pattern in the 2-D sample grows in a way of irreversible expandedness from a point to large scale cracks, which are fractals formed of lines and planes. The damage mechanism is based on the strength theory of tension strain for brittle materials, and the computer program is developed on the platform of ANSYS. The conclusion showed that the complex shape of a damage pattern can be deduced from the simple dynamic rule of the meso-element and the interaction between the meso-elements, and the boundary of the pattern moves forth in fractal shape. In the end of the paper, some inspirations for catastrophe prediction are discussed.

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