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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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.


Zhang Y.,Huanghe Science and Technology College
Advanced Materials Research | Year: 2014

The ancient Chinese architecture after two thousand years of development, formed the unique architectural style and aesthetic implication of Chinese traditional culture, this kind of architectural style and aesthetic connotations mainly reflected in the structure of the structure, roof shape, layout and color, etc. Appreciate the ancient Chinese architecture, can give a person very special aesthetic pleasure. © (2014) Trans Tech Publications, Switzerland.


Dong Z.L.,Huanghe Science and Technology College
Advanced Materials Research | Year: 2014

The element of Chinese characters should be applied, inherited and developed in the landscape design, demonstrating its superiority, reflecting the cultural differences of nations and highlighting the national characteristics. The Chinese character applied in the landscape not only shows the visual image but more importantly, it is also the accumulation of traditional historical culture and the expression carrier of it. Landscape design conducts in-depth inquiries and studies of various aspects of regional culture, landscape environment and material element, explores representative elements of the local area, takes the relationship between form and posture of Chinese character as an important part of the artistic thinking with implication as a core, which reveals the inner beauty of Chinese characters to a larger extent. Due to the development and progress of society, people live under the imperceptible influence of western culture. It is difficult for some of the traditional customs and legacies to keep a foothold in the contemporary society which are gradually losing its functional characteristics. Chinese characters involve very strong enlightenment significance and exert invisible effects on people, so in contemporary times, the evolutionary forms of Chinese characters are not only decorative, but also with strong cultural significance. Landscape design should follow the laws and principles of the beauty of form so as to present the sense of rhyming and rhythm. Various visual elements in design should utilize the spirit of Chinese characters in addition to their own essential requirements of forms so as to achieve the coordination and harmony among various elements in the landscape. © (2014) Trans Tech Publications, Switzerland.


Dong Z.L.,Huanghe Science and Technology College
Advanced Materials Research | Year: 2014

The colors carried in squares or outdoor resting areas such as buildings, architectural opuscules, pavements and waters are major component parts of colors used in gardening and landscape design, with plant colors in close second. No matter what kind of colors play the dominant roles, the basic principles of chromatics such as the color contrasting and blending should be followed in gardening and landscape design to realize the harmonious and graceful incorporation of colors. © (2014) Trans Tech Publications, Switzerland.


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.


Li K.,Huanghe Science and Technology College | Yang S.,Henan University of Technology
Pakistan Journal of Pharmaceutical Sciences | Year: 2014

In present study, we prepared a novel galantamine hydro bromide sustained-release capsules with the new manufacturing technology, extrusion-spheronization method, and the optimized preparative formulation. A simple, rapid and accurate high performance liquid chromatography method (HPLC) was developed and validated for the quantification and release evaluation of galantamine hydro bromide. Experimental results showed that the method was specific, sensitive and reliable, could be effectively applied to the in vitro release study of galantamine hydro bromide sustained-release capsules. Our resulting samples had superior properties, worked better as sustained-release carriers and lasted longer hours to release drugs compared with the marketed control, Razadyne ER. The in vitro releasing characteristics of different batches of preparations are quite similar with each other, the total release proportions of galantamine hydro bromide from sustained-release capsules reached higher than 90% within 12 h. The testing sustained-release preparation may be a promising new product for curing the related diseases.

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