Luoyang Institute of Science and Technology
Luoyang, China

Luoyang Institute of Science and Technology is an educational institute in the Chinese city of Luoyang. It has three campuses: Wangcheng, Kaiyuan and Jiudu, covering an area of 2229 acres, contains 17 departments. The school is founded as Sanmenxia Hydroelectric School in 1956, and merged with Luoyang University in 2007. Training bases founded by China Building Materials Federation and China Metallurgical Machine Building Materials Union are located in the school. Wikipedia.

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Zhang Q.,Luoyang Institute of Science and Technology
International Journal of Emerging Technologies in Learning | Year: 2017

In order to adapt to the needs of the rapid development of social networks, how to effectively improve college students' English comprehensive application ability, and rapidly improve listening and speaking skills has become an important research goal of college English teaching. This paper describes the main problems to be solved, and makes full use of the network and multimedia technology to build an open, interactive network English teaching platform. The platform provides students with abundant videos, images, voices, texts and other resources, so that the students can get help from teachers and other partners to improve their English ability.

Sun Z.,Luoyang Institute of Science and Technology
Journal of Chemical and Pharmaceutical Research | Year: 2014

A new path optimization algorithm based on ant colony— ant colony algorithm has showed great strengths in large scale optimization problem. This paper solved the optimization problem in the area coverage and barrier coverage based on ant colony algorithm. An improved basic ant colony algorithm is proposed. During the process that wireless sensor network try to cover its target area, a lot of redundant nodes are generated, resulting in excessive network energy consumption and incomplete node coverage. Against this problem, an efficient covering algorithm based on point set optimization is proposed. In the algorithm, the Gaussian normal density function and coverage area probability function are utilized during optimization of the point set, so that an optimal point set which meets certain coverage requirements is given through the quantitative relationship between the node sensing radius and number of nodes in the network, and furthermore, the network resource is optimized, the lifetime and Qos of the network are improved, and the network overhead is also reduced. Simulation result shows that: during test results against different coverage area and comparison to PEAS algorithm and GAF algorithm, the effectiveness and stability of the algorithm are verified. © 2014, Journal of Chemical and Pharmaceutical Research. All Rights Reserved.

Li B.,Luoyang Institute of Science and Technology
International Journal of Refractory Metals and Hard Materials | Year: 2014

Fractal theory is widely used to analyze the topography of machined surfaces, but the relationship between fractal dimensions and tool flank wear has hardly been reported. In this paper, the fractal dimensions of tool flank wear are described based on the surface roughness Ra rather than the conventional worn width VB to evaluate tool wear, thus providing better fractal identification in evaluating tool performance. © 2013 Elsevier Ltd.

Li B.,Luoyang Institute of Science and Technology
International Journal of Refractory Metals and Hard Materials | Year: 2014

TiB2-based ceramic composites with different amounts of ZrB 2 and SiC were prepared by spark plasma sintering at 1700 °C with an initial pressure of 40 MPa and a holding time of 10 min. The (Ti xZry)B2 solid solution was found in the sintered TiB2/ZrB2/SiC composites by XRD. The microstructural and mechanical properties of the prepared samples were investigated. The composite with the addition of 30 vol.% ZrB2 shows better comprehensive performances, and the bending strength and the fracture toughness of the composite are 780.5 MPa and 7.34 MPa m1/2, respectively. The generation of the (TixZry)B2 solid solution makes the microstructures of the composites finer and more homogeneous, which has played a very important role in grain refinement and interface fusion. © 2014 Elsevier Ltd.

Li B.,Luoyang Institute of Science and Technology
International Journal of Refractory Metals and Hard Materials | Year: 2012

A thorough understanding of the material removal process in cutting is essential in selecting the tool material and in design, and also in assuring consistent dimensional accuracy and surface integrity of the finished product. Tool wear in cutting process is produced by the contact and relative sliding between the cutting tool and the workpiece, and between the cutting tool and the chip under the extreme conditions of cutting area. This paper presents the information on development of study on theoretical analysis and numerical simulation of tool wear in all over the world. Hidden Markov models (HMMs) were introduced to estimate tool wear in cutting, which are strongly influenced by the cutting temperature, contact stresses, and relative strains at the interface. Finite element method (FEM) is a powerful tool to predict cutting process variables, which are difficult to obtain with experimental methods. The objective of this work focuses on the new development in predicting the tool wear evolution and tool life in orthogonal cutting with FEM simulations. © 2012 Elsevier Ltd. All rights reserved.

Li B.,Luoyang Institute of Science and Technology
International Journal of Refractory Metals and Hard Materials | Year: 2011

Dry cutting tests in air and nitrogen atmospheres with a ceramic cutting tool were carried out on normalized AISI 1045 steel. SEM and EDX techniques are employed to observe the chip morphology and tribological mechanisms are simultaneously discussed. The finite element model of chip formation was created to determine the effective stress and strain distributions in the chip and workpiece. Compared in nitrogen, the friction coefficient in air was reduced when the cutting speed is at 160 m/min and the feed rate is 0.1 mm/r. Experimental data and observation revealed the formation of a lubricating film at the tool-chip interface, which related to the difference chip morphology in air and nitrogen. © 2011 Elsevier Ltd. All rights reserved.

Hai Y.,Luoyang Institute of Science and Technology
Lecture Notes in Electrical Engineering | Year: 2012

The Distributed Denial of Service (DDoS) attack is one of the most common intrusions in the network violence. The failure for the DDoS detection and prevention may cause terrible destruction and make huge loss to the network users. As a result, the early detection and protection for the DDoS is imperative for the internet and computer security. The intelligent artificial neural network (ANN) can provide effective DDoS detection performance and make it reliable for the efficient operation of the network. However, the DDoS detection precision is heavily influenced by the structure parameters of the ANN. Inadequate design of the ANN detection model may lead to a low detection rate. To overcome these problems, a new DDoS detection approach based on PCA, improved genetic algorithm (GA) and ANN is proposed in this paper. The Principle Component Analysis (PCA) was firstly used to obtain the most important characteristics of the attack data to sweep away the redundancies. Thus, the input of the ANN is concise enough. Then the improved GA based on the energy entropy selection was used to optimize the structure of the ANN, and efficient ANN detection model with proper structure was hence attained. The efficiency of the proposed method was tested with the practical data. The analysis results show that the proposed new method can give satisfactory DDoS detection rate, and outperforms the standard GA-ANN method with respect to the detection accuracy. Hence, the proposed new DDoS detection approach has application importance. © 2012 Springer Science+Business Media B.V.

Pang Y.,Luoyang Institute of Science and Technology
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

Hybrid Learning is becoming one of important applications by integrating e-learning and traditional face-to-face instruction together. As an introduction to the reader the challenges in hybrid learning of physical education and architecture of Physical Education Hybrid Learning Platform (PEHLP) are firstly provided. The main character of PEHLP is using video instead of textual information as learning material. Then Video Review Module (VRM) is presented. Through the annotation composing functionality of VRM, the teacher can review the student's actions video, pick out the wrong actions and add still annotations, which for now are either text or specific graphic symbols or audiorecording. And through the annotation viewing/browsing functionality, the student can watch annotated video, find out mistakes and get instructions. In order to control over bandwidths and promote video annotation, the geometry primitives of video annotation graphic symbols are presented in Geometry Primitive Language (GPL) in XML. The experiment shows that the annotation data is 0.37% of the annotation data in JPG format. The user case of this paper shows that 80.9% out of students think that the video review can afford the hybrid learning of physical education, but only 66.7% of them think the hybrid learning instruction mode can attain the same teaching effect in contrasted F2F instruction mode. So we suggest that the proportion of e-learning should be less than 60% in hybrid learning of physical education course. © 2010 Springer-Verlag Berlin Heidelberg.

Wang Y.,Luoyang Institute of Science and Technology
Advanced Materials Research | Year: 2013

The corrosion rates of rebar HRB335 and the tensile mechanical properties before and after corrosion in 1.5 wt.% NaCl solution were studied. The results showed that, with increasing corrosion time from 30 days to 90 days, the corrosion rate of rebar HRB335 increases. With increasing corrosion time (corrosion rate), the yield strength and tensile strength of rebar HRB335 decrease, but the elongation increases at first and then decreases. © (2013) Trans Tech Publications, Switzerland.

Jun M.,Luoyang Institute of Science and Technology
International Journal of Advancements in Computing Technology | Year: 2012

With the rapid development of the Internet and E-business, the security problem causes more and more attention. How to insure authentication, integrity, confidentiality, and non-repudiation of information has became a predominant task in domain of information security and E-business. The paper presents public key encryption ways and its affect on E-business online, discoursing the application in this area along with its advantages and disadvantages, and analyzing PKI(Public Key Infrastructure) technology to enhance security in E-business transactions. This paper also shows the public key encryption methods cryptographic technologies can be useful in various points in the Ebusiness.

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