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Luoyang, China

Henan University of Science and Technology is a comprehensive teaching and research university which ranks top three in Henan Province. The university has 26 colleges, 77 undergraduate programs, 69 master degree programs, covering science, engineering, agriculture, medicine, economics, management science, literature, law, history, education and other 10 disciplines, with the MBA, Master of Engineering, Master of clinical Medicine, veterinary Medicine master's and professional master's degree in agricultural extension. It is granted the right to authorize a joint Ministry of Education to recruit, train units of doctoral students. The university is located in Luoyang, Henan province, China. Wikipedia.

Jingzhuo J.,Henan University of Science and Technology | Liu B.,Harbin Institute of Technology
IEEE Transactions on Industrial Electronics

The operational efficiency of ultrasonic motor motion control systems is much lower than that of traditional electromagnetic motors, which badly restricts the application of ultrasonic motor in portable devices. Lower efficiency, robustness, and wear condition are the main problems of ultrasonic motor systems. This paper studies on the optimum efficiency control strategy of an ultrasonic motor system and selects the commercially used ultrasonic motor Shinsei USR60 as the experimental motor. To provide a basis for the optimum efficiency control, the control characteristic of system efficiency is studied first under speed closed-loop control condition. Then, a novel feedforward speed controller compounded with a pole-assignment controller is designed to compensate the disturbance caused by the efficiency optimization process. After that, the optimum efficiency control strategy with varying step length based on fuzzy reasoning is proposed. Experiments show that the proposed optimum control methods can greatly increase the operational efficiency of the ultrasonic motor system. © 2011 IEEE. Source

Li H.,Henan University of Science and Technology | Wang Y.,Shandong University
Optics and Lasers in Engineering

A novel double-image encryption algorithm is proposed, based on discrete fractional random transform and chaotic maps. The random matrices used in the discrete fractional random transform are generated by using a chaotic map. One of the two original images is scrambled by using another chaotic map, and then encoded into the phase of a complex matrix with the other original image as its amplitude. Then this complex matrix is encrypted by the discrete fractional random transform. By applying the correct keys which consist of initial values, control parameters, and truncated positions of the chaotic maps, and fractional orders, the two original images can be recovered without cross-talk. Numerical simulation has been performed to test the validity and the security of the proposed encryption algorithm. Encrypting two images together by this algorithm creates only one encrypted image, whereas other single-image encryption methods create two encrypted images. Furthermore, this algorithm requires neither the use of phase keys nor the use of matrix keys. In this sense, this algorithm can raise the efficiency when encrypting, storing or transmitting. © 2011 Elsevier Ltd. All rights reserved. Source

Guo X.,Henan University of Science and Technology
Journal of Convergence Information Technology

Compared with the traditional transaction, the characteristic of a typical e-commerce is that there is greater uncertainty. This article summarizes the factors from websites, online operator characteristics, consumer personal factors. And it established trust model for providing consumers purchase basis when in the "information inaccuracy" and "information incomplete" condition. This trust model is established by using DS evidence theory. Source

Jing H.,Henan University of Science and Technology
Sensors and Transducers

In ultrasonic testing of concrete structure quality, in order to obtain an accurate evaluation to concrete quality, the high imaging accuracy is needed. Because of the non-uniformity of concrete structure, classic algorithm is difficult to meet the requirement of high accuracy tomography computation, and even disabled result will be obtained. An improved simulated annealing (SA) algorithm based on chaos search and natural weight function is presented. Firstly, curve ray tracing method is applied to determine the final propagation path, and then chaos search and natural weight function are introduced to modify the path and improve the accuracy of simulated annealing-backfire algorithm, and the CT image of structure is calculated and obtained by the algorithm. It is shown from numerical simulation that the improved algorithm is more effective and accurate, and imaging resolution is improved obviously. © 2014 IFSA Publishing, S. L. Source

Fang Q.,Wuhan University | Fang Q.,Henan University of Science and Technology | Huang S.-Q.,Wuhan University

Community studies have shown that plant species are often pollinated by multiple pollinators; however, networks of heterospecific pollen transfer (HPT) in natural communities remain largely unexplored. We analyzed pollen deposition on stigmas of 57 flowering species to build a picture of plant-plant interactions via HPT in a biodiverse alpine meadow in southwest China. Plant species were categorized as pollen donors or recipients by their link numbers and link qualities. We identified 3609 heterospecific pollen grains, representing 410 links among 69 pollen species. Each plant species received on average 7.2 pollen species and donated its pollen to 5.5 species; only a few species donated or received large amounts of pollen or pollen from a large number of species. Compared to specialized plants, generalized plants tended to receive more heterospecific pollen but exported no more pollen to other species. Plant position in the network was related to both floral traits (stigma position) and pollinator generalization level. When different species share the same pollinator, bidirectional HPT may occur, but this was rarely observed in the species-rich community, indicating that interspecific pollen interference was largely unidirectional. Our study highlights the importance of understanding how sympatric flowering plants reduce deleterious effects of HPT, for example via stigma position. This study is the first to present a pollen transfer network for an entire community and to unravel its properties using directed network analysis. © 2013 by the Ecological Society of America. Source

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