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 | Year: 2011
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.
Fang Q.,Wuhan University |
Fang Q.,Henan University of Science and Technology |
Huang S.-Q.,Wuhan University
Ecology | Year: 2013
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.
Li H.,Henan University of Science and Technology |
Wang Y.,Shandong University
Optics and Lasers in Engineering | Year: 2011
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.
Jingzhuo S.,Henan University of Science and Technology |
Dongmei Y.,Henan University of Science and Technology
Ultrasonics | Year: 2014
In general, the design and analysis of ultrasonic motor and motor's control strategy are based on mathematical model. The academic model is widely used in the analysis of traveling wave ultrasonic motor (TWUSM). But the dispersive characteristic of piezoelectric ceramics and other complicated process, such as the friction, make the model's precision not so accurate. On the other hand, identification modeling method, which is built based on the tested data, has obtained increasing application in the study of ultrasonic motor's control technology. Based on the identification model, many control strategies can be designed easily. But the identification model is an approximate model, so if a more accurate model of ultrasonic motor can be obtained, the analysis and design of motor control system will be more effective. Characteristic model is a kind of identification model which can accurately describe the characteristics of TWUSM. Based on the tested data, this paper proposes the modeling method of ultrasonic motor's characteristic model. The paper also makes a comparison of the effectiveness of different identification algorithms. Aiming at the speed control of ultrasonic motor, the influence of the parameter's initial values on the precision of model is discussed. The calculating results indicate the availability of this characteristic model. © 2013 Elsevier B.V. All rights reserved.
Xia X.,Henan University of Science and Technology
Quality and Reliability Engineering International | Year: 2012
For costly and dangerous experiments, growing attention has been paid to the problem of the reliability analysis of zero-failure data, with many new findings in world countries, especially in China. The existing reliability theory relies on the known lifetime distribution, such as the Weibull distribution and the gamma distribution. Thus, it is ineffective if the lifetime probability distribution is unknown. For this end, this article proposes the grey bootstrap method in the information poor theory for the reliability analysis of zero-failure data under the condition of a known or unknown probability distribution of lifetime. The grey bootstrap method is able to generate many simulated zero-failure data with the help of few zero-failure data and to estimate the lifetime probability distribution by means of an empirical failure probability function defined in this article. The experimental investigation presents that the grey bootstrap method is effective in the reliability analysis only with the few zero-failure data and without any prior information of the lifetime probability distribution. Copyright © 2011 John Wiley & Sons, Ltd.
Guo X.,Henan University of Science and Technology
Journal of Convergence Information Technology | Year: 2011
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.
Jing H.,Henan University of Science and Technology
Sensors and Transducers | Year: 2014
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.
Li J.-Y.,Henan University of Science and Technology |
Ma X.,Henan University of Science and Technology |
Zhang C.-B.,Henan University of Science and Technology
International Journal of Clinical and Experimental Pathology | Year: 2014
Introduction: Long non-coding RNAs (lncRNAs) have been shown to have important regulatory roles in cancer biology, and the lncRNA UCA1 is upregulated in several cancers such as bladder cancer, breast cancer and colorectal cancer, however, the contributions of UCA1 to esophageal cancer remain largely unknown. Methods: Expression levels of lncRNA UCA1 in esophageal squamous cell carcinoma (ESCC) patients and esophageal cancer cell lines were evaluated by quantitative real-time PCR (qRT-PCR), and its association with overall survival of patients was analyzed by statistical analysis. Small interfering RNA was used to suppress UCA1 expression in esophageal cancer cell line. In vitro assays were conducted to further explore its underlying roles in tumor progression. Results: The relative level of UCA1 was significantly higher in ESCC tissues compared to the adjacent non-tumor tissues, and remarkably higher expression of UCA1 was found in esophageal cancer cell lines compared with the immortalized esophageal epithelial cell line NE1. The ESCC patients with higher UCA1 expression had an advanced clinical stage and a poorer prognosis than those with lower expression. In vitro assays, our data indicated that downregulation of UCA1 decrease cell proliferation, migration, and invasion ability. Conclusions: lncRNA UCA1 might be considered as a novel molecule involved in ESCC progression, which provides a potential prognostic biomarker and therapeutic target.
Guo D.L.,Henan University of Science and Technology
Genetics and molecular research : GMR | Year: 2011
Simple sequence repeat (SSR) molecular markers based on 18 primers were employed to study the genetic relationship of Japanese persimmon (Diospyros kaki) specimens. Two hundred and sixty-two bands were detected in 30 Japanese persimmon samples, including 14 Japanese and 10 Chinese genotypes of Japanese persimmon (Diospyros kaki) and six related species, D. lotus, D. glaucifolia, D. oleifera, D. rhombifolia, D. virginiana, and Jinzaoshi (unclassified - previously indicated to be D. kaki). All SSR primers developed from D. kaki were successfully employed to reveal the polymorphism in other species of Diospyros. Most of the primers were highly polymorphic, with a degree of polymorphism equal to or higher than 0.66. The results from the neighbor-joining dendrogram and the principal coordinate analysis diagram were the same; i.e., the Chinese and Japanese genotypes and related species were separated and the relationships revealed were consistent with the known pedigrees. We also concluded that 'Xiangxitianshi' from Xiangxi municipality, Hunan Province, China, is actually a sport or somaclonal variant of 'Maekawa-Jirou', and that 'Jinzaoshi' should be classified as a distinct species of Diospyros. We found that SSR markers are a valuable tool for the estimation of genetic diversity and divergence in Diospyros.
Guo X.,Henan University of Science and Technology
Molecular Biology Reports | Year: 2014
Although the relationships between endothelial nitric oxide synthase (eNOS) gene polymorphisms (including G894T, VNTR and T786C) and risk of ischemic stroke (IS) have been extensively studied, controversial results have been reported. The aim of this study was to assess the relationships between them by using a meta-analysis. Literatures were retrieved through the following databases: Medline, Embase and Wangfang (updated to January 1st, 2013). Fixed- or random-effects model was used to calculate pooled odds ratio and 95 % confidence interval (OR and 95 % CI). A total of 31 case-control studies including 8,547 patients and 9,117 controls were included in this meta-analysis eventually. For eNOS G894T polymorphism, the results indicated that TT genotype was significantly associated with increased risk of IS incidence compared to G allele (OR and 95 % CI 1.25 (1.09-1.42) for TT vs. GT+GG, P < 0.001). When subgroup analysis was conducted according to ethnicities, T allele was significantly associated with risk of IS for Asians rather than for Caucasians. For eNOS VNTR polymorphism, 4aa genotype was significantly associated with risk of IS incidence compared to 4bb genotype (OR (95 % CI) 2.22 (1.66-2.97) for aa vs. bb, P < 0.001). Similarly, when subgroup analyses were conducted, 4aa was closely associated with increased risk of IS for Asians rather than for Caucasians. For eNOS T786C polymorphism, it was not associated with risk of IS incidence. In conclusion, this study indicated that eNOS 894T and VNTR 4a allele was significantly associated with risk of IS incidence for Asians. However, eNOS T786C polymorphism was not a likely risk factor for IS incidence. © 2014 Springer Science+Business Media Dordrecht.