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Pingyuan, China

Shangqiu Normal University , formerly known as Shangqiu Teachers' College, is a public university in the city of Shangqiu, in Henan Province of China. As a key university in Henan Province, it is a comprehensive local university with salient features of teacher training and particular strength in liberal arts. The main undertakings of the university are undergraduate education with the chief aim of producing high level application-oriented talents.The institution has a student population of about 12, 000 students, and is divided into two campuses: the Old Campus, and the New Campus. The Old Campus is about 100 years old and houses the University's technical and science related majors: mathematics, computer science, etc. The New Campus, which is finishing construction at the time of this writing, lies less than 1 km away; it houses the University's liberal arts: English, History, Music, etc. Over the next few years, the University plans to acquire land from a military training center on its western boundary, further increasing its size and eventually classifying it as a full-fledged University. Wikipedia.

Gao X.,Shangqiu Normal University
International Review on Computers and Software | Year: 2012

Due to noise and low gradient response, medical image segmentation often demands as much prior information as possible to extract the Region of Interest (ROI). In this paper we propose a novel level set image segmentation model, in which prior shape statistical knowledge of ROI is introduced into the improved Chan-Vese's model [1]. A shape prior level set image segmentation method mainly consists of the constructions of the prior shape model and the shape energy term. Aiming at these two parts, two pieces of work are mainly done: (1) A image feature alignment transformation scheme is proposed, which can construct the prior shape simplify based on statistical image information; (2) A new construction method of shape energy term is presented, which considers the global and local shape information at the same time, so it is no longer need to introduce pose parameters to keep evolving surface stable. The experiments are taken on abdomen CT series and the results reveal that our shape prior level set method can overcome the leakage and over-segmentation problems and can segment liver shape precisely. © 2012 Praise Worthy Prize S.r.l. - All rights reserved. Source

Ren J.,Nanjing Southeast University | Ren J.,Shangqiu Normal University | Sun Z.-Z.,Nanjing Southeast University | Zhao X.,Nanjing Southeast University
Journal of Computational Physics | Year: 2013

An effective finite difference scheme is considered for solving the time fractional sub-diffusion equation with Neumann boundary conditions. A difference scheme combining the compact difference approach the spatial discretization and L 1 approximation for the Caputo fractional derivative is proposed and analyzed. Although the spatial approximation order at the Neumann boundary is one order lower than that for interior mesh points, the unconditional stability and the global convergence order O(τ 2 - α + h 4) in discrete L 2 norm of the compact difference scheme are proved rigorously, where τ is the temporal grid size and h is the spatial grid size. Numerical experiments are included to support the theoretical results, and comparison with the related works are presented to show the effectiveness of our method. © 2012. Source

Zeng Q.-G.,Shangqiu Normal University
Nuclear Physics B | Year: 2016

The quintuplet heavy leptons are the typical particles predicted by the TeV scale seesaw model which is proposed as a viable and testable solution to the neutrino masses problem. The observation of these particles might be regarded as a direct evidence of the new model. In this paper, we investigate production and detection prospects of the quintuplet heavy leptons in the processes e+e-→σ++σ++(σ+σ+) and e+e-→Zσ++σ++(Zσ+σ+) at the ILC. We present the production cross sections and the main kinematic distributions of the various observables. Our numerical results show that the values of cross sections can reach a few hundreds of fb. We also study the possible final state signals of quintuplet heavy leptons and relevant SM backgrounds. Due to high produced rate and small SM backgrounds, the possible signals of quintuplet heavy leptons might be detected via some processes in the future ILC experiments. © 2016 The Author. Source

Zheng A.,Shangqiu Normal University
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2012

Cadmium (Cd) is among the most widespread and toxic pollutants in the surface soil layer. Its toxicity in soil is becoming a severe threat to organisms worldwide. It is the most dangerous carcinogen for the human body, and readily accumulates in kidneys and bones, leading to disruption of kidney function, osteomalacia and bone breakage. Wide areas of agricultural soil across China are heavily contaminated by Cd and thus it enters the food chain. In soil, Cd is distributed mainly in the topsoil and, without deposited by soil organic compounds, it is more easily assimilated by crop roots compared with other heavy metals. However, vegetable cultivars accumulate much more Cd in the shoot, the portion eaten by humans. In China, total vegetable production is 3. 45 million tones, which ranks as the highest in the world, and most of the vegetable-farming land is located in suburban areas where highly intensive industries are located and thus the lands are widely contaminated by heavy metal pollutants. As a result, vegetables in most city markets contain Cd at levels two-to three-fold, or in extreme cases 5. 2-fold, higher than the National Sanitary Criteria of Cd content in vegetable products. Economically, the heavy metal problem weakens the international competitiveness of the Chinese vegetable industry, therefore decontamination of heavy metals from polluted soils, as well as lowering of Cd residues in vegetables, is of great urgency both for human health and the national economy. Hydroponic experiments were conducted in a greenhouse to study the effects of Cd on lipid peroxidation and membrane proton pump activity of Chinese kale (Brassica alboglabra Bailey) roots, and to explore the toxicity of Cd stress on plants. Plants were grown under controlled environmental conditions, and subjected to different Cd concentrations ranging from 0 to 8 mg/ L. We determined the root activity, rate of O-2 generation, H2 O2 and malondialdehyde (MDA) contents as well as activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), H+-ATPase and Ca2+-ATPase of Chinese kale roots exposed to five different Cd concentrations for 10 days. The root activity decreased with increasing Cd concentration, which resulted in a significant increase in O-2 and H2 O2 concentrations and MDA content, compared with the control (CK). Increasing Cd concentration enhanced activities of SOD, POD, and CAT (P < 0. 05), which indicated that the Chinese kale plants were stressed by Cd. No significant difference in H2 O2 content was observed among the CK, 1. 0 and 2. 0 mg/ LCd treatments, while a similar trend was observed in rate of O-2 generation between the CK and 1. 0 mg/ L Cd treatment. The activities of H +-ATPase and Ca 2+- ATPase first increased and then decreased with the increase in Cd concentration. In addition, the activities of H +-ATPase and Ca 2+-ATPase showed no obvious change (P > 0. 05) in response to 1. 0 mg/ L Cd, but significantly decreased with stress induced by 2. 0, 4. 0 and 8. 0 mg/ L Cd (P < 0. 05). A negative correlation existed between the level of membrane lipids and the two enzymes. We concluded that there was no noticeable change under a low Cd concentration of ATPase activity in the plasma membrane of Chinese kale roots, whereas under relatively high Cd stress activity dropped markedly and root growth was suppressed. Source

Gao X.,Shangqiu Normal University
International Journal of Biomedical Engineering and Technology | Year: 2013

This paper proposes an effective retinal vessel segmentation method based on a combination of line detectors at different scales. To decrease the influence of optic disc and enhance retinal vessel (especially small vessel) response for each retinal image, the proposed method first applies a top-hat transform and a line filter to the background homogenised retinal image. Then an improved multi-scale detection is used to produce a vascular response image for each retinal image. Since the contribution of different lengths of line detectors to vessel response is not equal, the improved multi-scale detection combines all line responses at varying scales by their contribution to vessel response. The performance of the proposed method is evaluated on two publicly available DRIVE, STARE databases. Experimental results demonstrate that our method achieves high accuracy and approximates the average accuracy of a human observer without a significant degradation of sensitivity and specificity. © 2013 Inderscience Enterprises Ltd. Source

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