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Zhang L.,Henan University | Xue M.,Kaifeng Institute of Education | Cui Y.,Henan University
Journal of Applied Polymer Science | Year: 2010

Polyvinyl chloride-triethylene-tetramine supported palladium complex (PVC-TETA-Pd) was prepared from polyvinyl chloride via simple method and the production cost of the complex was remarkably low. The complex was an efficient catalyst for Heck reaction. It was active for low activity substrates such as aryl bromides and aryl chlorides. The coupling of bromobeneze with styrene catalyzed by PVC-TETA-Pd afforded 99.8% yield of stilbene under the optimized reaction conditions. PVC-TETA-Pd could catalyze the Heck reactions in the presence of several different kinds of acid-binding agents. Furthermore, the good reusability of PVC-DTA-Pd was also found for Heck reaction. © 2009 Wiley Periodicals, Inc. Source


Zhang X.,Kaifeng University | Huang Y.,Kaifeng Institute of Education
Sensors and Transducers | Year: 2013

The non-orthogonal fusion frame plays an important role in the applications such as sensor networks, coding theory, compressed sensing, and so on. In this paper, the definition of non-orthogonal fusion frame is given and their properties are in detail discussed. These results generalize some existing properties of orthogonal fusion frame and classical frame. © 2013 IFSA. Source


Miao L.,Kaifeng Institute of Education | Li X.,Kaifeng University
Communications in Computer and Information Science | Year: 2011

The paper mainly illustrated how to develop the test resourse database in teaching software under the guidence of learning object theory and technology. By a systematic analysis to test learning object, the specific design method was found. A true/false question was listed as an example through Flash ActionScript3.0 technology and practice shows that the development efficiency has been greatly improved. © 2011 Springer-Verlag. Source


Zhang X.,Kaifeng Institute of Education
Advanced Materials Research | Year: 2013

The multiwavelet has more desired properties than any single wavelet, such as short support, symmetry, and smoothness. In this paper, symmetric multiwavelet frames with general lattice and with any symmetric points are constructed from multiwavelet frames given. The existing result is generalized to the case of general lattice. © (2013) Trans Tech Publications, Switzerland. Source


Miao L.,Kaifeng Institute of Education | Sui C.-R.,Xingtai University
Proceedings - 2011 International Conference on Computational and Information Sciences, ICCIS 2011 | Year: 2011

In order to adapt to the demand of actual ability of development of multimedia technology, this paper presents a new course structure. For professional training objectives, we studied the focus and difficult points in multimedia technology and applications, and built the knowledge modules system of courses and a platform for teaching practice. This course structure is supported by network resources to build a three-dimensional self-learning environment. Practice shows that this system can fully arouse students' sense of innovation, foster professional accomplishments of students and get good teaching results. © 2011 IEEE. Source

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