Huanghe Science and Technology College

www.hhstu.edu.cn
Zhengzhou, China

Huanghe Science and Technology College is a private four-year university located in Zhengzhou, Henan, People's Republic of China. Wikipedia.

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Wang X.,Huanghe Science and Technology College
International Journal of Simulation: Systems, Science and Technology | Year: 2016

Skin color is one of the essential attributes of human body surface. For gesture with complicated background, skin color features of human hands are more obvious and intuitive than other features. In addition, color information is not influenced by object zooming, rotating, translation and other deformations, so it has good invariance. At present, skin color detection plays a significant role in gesture recognition, but it’s easy for skin color detection to mix other body parts and other objects with similar color and skin color in gesture detection. Based on skin color detection and combining improved Visual Background Extractor VIBE moving object detection algorithm, segmented gestures were put under morphological processing in this paper to obtain relatively complete gesture image. © 2016, UK Simulation Society. All rights reserved.


Wang S.,Huanghe Science and Technology College | Yang B.,Huanghe Science and Technology College | Yuan J.,Huanghe Science and Technology College | Si Y.,Huanghe Science and Technology College | Chen H.,State University of New York at Buffalo
Scientific Reports | Year: 2015

Understanding the effect of defects on mechanical responses and failure behaviors of a graphene membrane is important for its applications. As examples, in this paper, a family of graphene with various 5-8-5 defects are designed and their mechanical responses are investigated by employing molecular dynamics simulations. The dependence of fracture strength and strain as well as Young's moduli on the nearest neighbor distance and defect types is examined. By introducing the 5-8-5 defects into graphene, the fracture strength and strain become smaller. However, the Young's moduli of DL (Linear arrangement of repeat unit 5-8-5 defect along zigzag-direction of graphene), DS (a Slope angle between repeat unit 5-8-5 defect and zigzag direction of graphene) and DZ (Zigzag-like 5-8-5 defects) defects in the zigzag direction become larger than those in the pristine graphene in the same direction. A maximum increase of 11.8% of Young's modulus is obtained. Furthermore, the brittle cracking mechanism is proposed for the graphene with 5-8-5 defects. The present work may provide insights in controlling the mechanical properties by preparing defects in the graphene, and give a full picture for the applications of graphene with defects in flexible electronics and nanodevices. © 2015 Macmillan Publishers Limited.


Li L.,Huanghe Science and Technology College
Journal of Chemical and Pharmaceutical Research | Year: 2014

By researching on table tennis competition, it is found that paddlers inevitable would apply game theory thoughts in competition process. Utilizing mathematical model method in researching some data in competition, it gets paddlers left serve or right serve influences on score probability, then carries out normal distribution examination on the data, it gets that its P value is conform to variance analysis request, after that make single-factor variance analysis. By researching, it is clear that when making left serve, it can improve score probability, and their left and right serve times have no significant influence.


Li R.,Huanghe Science and Technology College
Agro Food Industry Hi-Tech | Year: 2017

With the rapid development of information technology, computer aided translation technology was applied to the production operations and operation management process in every field, the same was applied to English teaching. The computer aided translation technology makes the English teaching more convenient. The students can use this learning tool to make English learning more flexible and very helpful for the teachers. With the help of computer translation technology, the English teachers should teach the students the correct use of computer translation technology, which can greatly improve the English teaching. This paper, based on the combination of computer translation technology, investigates the application of computer translation technology in English teaching, and then makes researches on the application. I hope this paper can promote the development of related industries.


Zhang R.,Huanghe Science and Technology College
Nonlinear Dynamics | Year: 2013

In this paper, a three-dimensional autonomous nonlinear system called the T system which has potential application in secure communications is considered. Regarding the delay as parameter, we investigate the effect of delay on the dynamics of T system with delayed feedback. Firstly, by employing the polynomial theorem to analyze the distribution of the roots to the associated characteristic equation, the conditions of ensuring the existence of Hopf bifurcation are given. Secondly, by using the normal form theory and center manifold argument, we derive the explicit formulas determining the stability, direction and other properties of bifurcating periodic solutions. Finally, we give several numerical simulations, which indicate that when the delay passes through certain critical values, chaotic oscillation is converted into a stable steady state or a periodic orbit. © 2013 Springer Science+Business Media Dordrecht.


Wireless Sensor Networks (WSN) produce a large amount of data that need to be processed, delivered and assessed according to the application objectives. A WSN may be designed to monitor the working state of power transformer timely, efficiently and remotely by virtue of the sensor nodes placed in transformer oil, gathering the real-time data of the dissolved multi-component gases in oil. The way these data are manipulated by the sensor nodes is a fundamental issue and information fusion arises to process data gathered by sensor nodes and benefits from their processing capability. This paper presents a novel method to diagnose transformer fault making comprehensive use of extension theory and multivariate optimization of fusion theory, which can effectively and intelligently diagnose transformer fault types, providing more convenience for the workers on remote monitoring and improving the intelligent degree of the fault diagnosis. © 2011 Published by Elsevier Ltd.


Xiao M.,Chinese University of Hong Kong | Zhao C.,Huanghe Science and Technology College | Chen H.,Chinese University of Hong Kong | Yang B.,Huanghe Science and Technology College | Wang J.,Chinese University of Hong Kong
Advanced Functional Materials | Year: 2012

Noble metal nanostructures are grown inside hollow mesoporous silica microspheres using "ship-in-a-bottle" growth. Small Au seeds are first introduced into the interior of the hollow microspheres. Au nanorods with synthetically tunable longitudinal plasmon wavelengths and Au nanospheres are obtained through seed-mediated growth within the microspheres. The encapsulated Au nanocrystals are further coated with Pd or Pt shells. The microsphere-encapsulated bimetallic core/shell nanostructures can function as catalysts. They exhibit high catalytic performance and their stability is superior to that of the corresponding unencapsulated core/shell nanostructures in the catalytic oxidation of o-phenylenediamine with hydrogen peroxide. Therefore, these hollow microsphere-encapsulated metal nanostructures are promising as recoverable and efficient catalysts for various liquid-phase catalytic reactions. Different monometallic Au and bimetallic Au-cored nanostructures are grown using a "ship-in-a-bottle" technique in hollow mesoporous silica microspheres. The microsphere-encapsulated Au nanorod core/Pt shell nanostructures exhibit both high catalytic performance and superior recyclability in the oxidation reaction of o-phenylenediamine with hydrogen peroxide, while the conversion percentage in the presence of the corresponding unencapsulated nanostructures decreases rapidly with the recycle number. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Hu A.,Huanghe Science and Technology College
Proceedings - 4th International Congress on Image and Signal Processing, CISP 2011 | Year: 2011

According to the hidden danger of environmental security in substations, by combining with the characteristics of wireless sensor network (WSN), this paper aims at analyzing the application of WSN in monitoring the environmental parameters and equipment conditions in substation. And the structure of the monitoring system is proposed. The system is useful to the substation. © 2011 IEEE.


Chen H.,Chinese University of Hong Kong | Shao L.,Chinese University of Hong Kong | Man Y.C.,Chinese University of Hong Kong | Zhao C.,Huanghe Science and Technology College | And 2 more authors.
Small | Year: 2012

A fano resonance is observed in highly symmetric nanostructures comprising Au nanosphere cores and dielectric shells. It arises from the interference between the narrow plasmon resonance of the Au nanosphere core and the broad scattering background of the dielectric shell. The Fano resonance behavior is dependent on the gap distance between the core and shell and the shell material. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Chen H.,Chinese University of Hong Kong | Ming T.,Chinese University of Hong Kong | Zhang S.,Huanghe Science and Technology College | Jin Z.,Chinese University of Hong Kong | And 2 more authors.
ACS Nano | Year: 2011

Understanding the electromagnetic interactions between plasmonic noble metal nanocrystals and different substrates is very important because a number of plasmon-based devices and applications, such as chemical and biological sensing, metamaterials, subwavelength waveguides, plasmon-enhanced photovoltaic cells, plasmon-enhanced spectroscopy, and photoswitches, require the attachment of metal nanocrystals onto various substrates. In this study, we focused on the effect of the dielectric properties of substrates on the far-field scattering patterns of supported Au nanorods. Seven types of substrates, including metals, semiconductors, and insulators, were examined. The far-field scattering patterns from individual Au nanorods were found to exhibit a doughnut shape when the modulus of the dielectric constant of the substrate is above ∼7, while they appear as solid bright spots when the modulus is below ∼7. This finding was validated by numerical electrodynamic calculations. Moreover, the doughnut-shaped scattering patterns are very sensitive to the spacing between the nanorod and substrate. For the nanorods supported on silicon wafers, when the spacing is increased above ∼14 nm, the scattering patterns change from the doughnut shape to the solid bright spot. These results will be useful for the understanding of the plasmonic properties of noble metal nanocrystals supported on substrates and the development of a number of plasmon-based optical and optoelectronic devices at different size scales. © 2011 American Chemical Society.

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