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Search Results: 1 - 10 of 104183 matches for " ZHANG Rungang "
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Paper-like graphene-Ag composite films with enhanced mechanical and electrical properties
Rungang Gao, Nantao Hu, Zhi Yang, Qirong Zhu, Jing Chai, Yanjie Su, Liying Zhang and Yafei Zhang
Nanoscale Research Letters , 2013, DOI: 10.1186/1556-276X-8-32
Abstract: In this paper, we have reported that paper-like graphene-Ag composite films could be prepared by a facile and novel chemical reduction method at a large scale. Using ascorbic acid as a reducing agent, graphene oxide films dipped in Ag+ ion aqueous solutions can be easily reduced along with the decoration of different sizes of Ag particles distributed uniformly. The results reveal that the obtained films exhibit improved mechanical properties with the enhancement of tensile strength and Young's modulus by as high as 82% and 136%, respectively. The electrical properties of graphene-Ag composite films were studied as well, with the sheet resistance of which reaching lower than approximately 600 Omega/[white square]. The graphene-Ag composite films can be expected to find interesting applications in the area of nanoelectronics, sensors, transparent electrodes, supercapacitors, and nanocomposites.

YE Ruizeng,XU Zhichao,GE Zhanying,GAO Liang Beijing University of Iron,Steel Technology,YU Tongfeng,ZHANG Rungang,LI Lijia,ZHANG Peihuan Xingdu Machine Works,

金属学报 , 1985,
Study on the Antiwear Behavior of Ni Base Alloy Chromium Carbide Composite Coating

Lin Huachun,Ding Rungang,

摩擦学学报 , 1996,
Abstract: The Ni base alloy chromium carbide composite coating was prepared on the surface of 45 # steel using vacuum fusion sintering method. The microstructure and phase construction of composite coating were analyzed by means of SEM and x ray diffraction,and the antiwear property was investigated. The results showed that the composite coating is firmly adhered to substrate,and contains the hard phase with higher ratio. Adding chromium carbide can obviously increase the antiwear property of coating. In the given conditions,the antiwear property of Ni base alloy chromium carbide composite coating is 5 fold and 20 fold higher than those of 45 # steel under dry or 20 # machinery oils lubrication respectively.
The Influence of Family Supportive Supervisor Behavior on Employee Helping Behavior: From the Perspective of Family-Like Exchange Relationship

WANG Sanyin
,LIU Hong,LIU Rungang

- , 2018,
Abstract: 摘要 基于中国本土文化情境建立了一个被中介的调节模型,考察了家庭支持型主管行为对员工帮助行为的影响机制,检验了类亲情交换关系的中介作用和员工传统性的调节作用。研究结果发现,家庭支持型主管行为对员工的帮助行为有着积极的影响,并且这种积极的影响是通过类亲情交换关系的完全中介作用实现的。此外,较高的员工传统性能够增强家庭支持型主管行为对员工类亲情交换关系的积极影响;同时,较高的员工传统性还能增强类亲情交换关系的中介效应,即员工传统性越高,类亲情交换关系的中介效应越大
An Efficient and Concise Algorithm for Convex Quadratic Programming and Its Application to Markowitz’s Portfolio Selection Model  [PDF]
Zhongzhen Zhang, Huayu Zhang
Technology and Investment (TI) , 2011, DOI: 10.4236/ti.2011.24024
Abstract: This paper presents a pivoting-based method for solving convex quadratic programming and then shows how to use it together with a parameter technique to solve mean-variance portfolio selection problems.
Investigation and Analysis of Sexual Harassment in Corporate Workplace of China  [PDF]
Xiaobing Zhang, Zewei Zhang
Sociology Mind (SM) , 2012, DOI: 10.4236/sm.2012.23038
Abstract: At present, sexual harassment in domestic workplace has a high probability of occurrence, which causes more and more attention. In this paper, the form of sexual harassment in workplace, and how to solve the sexual harassment were investigated and analyzed through questionnaires; and countermeasures and management suggestions were put forward from three aspects of corporate, employees and family.
Chaos Control in a Discrete Ecological System  [PDF]
Limin Zhang, Chaofeng Zhang
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2012, DOI: 10.4236/ijmnta.2012.13011
Abstract: In research [1], the authors investigate the dynamic behaviors of a discrete ecological system. The period-double bifurcations and chaos are found in the system. But no strategy is proposed to control the chaos. It is well known that chaos control is the first step of utilizing chaos. In this paper, a controller is designed to stabilize the chaotic orbits and enable them to be an ideal target one. After that, numerical simulations are presented to show the correctness of theoretical analysis.
Crystallization and Characterization of a New Fluorescent Molecule Based on Schiff Base  [PDF]
Dehua Zhang, Xiaoyan Zhang
Journal of Crystallization Process and Technology (JCPT) , 2013, DOI: 10.4236/jcpt.2013.31004

In this analysis, the single crystal of schiff base has been synthesized and the purity of material has been increased by repeated recrystallization process. Single crystal was grown by adopting the method growing in a slow evaporation solution using ethanol as solvent at room temperature. A new fluorescent molecule based on Schiff base has been synthesised and its binding properties investigated by fluorescence spectroscopy to show that it can selectively bind Cu2+ with fluorescence quenching.

Mathematical Reasoning of Economic Intervening Principle Based on “Yin Yang Wu Xing” Theory in Traditional Chinese Economics (I)  [PDF]
Ziqing Zhang, Yingshan Zhang
Modern Economy (ME) , 2013, DOI: 10.4236/me.2013.42016

By using mathematical reasoning, this paper demonstrates the economic intervening principle: “Virtual disease is to fill his mother but real disease is to rush down his son” and “ Strong inhibition of the same time, support the weak” based on “Yin Yang Wu Xing” Theory in Traditional Chinese Economics (TCE). We defined generalized relations and generalized reasoning, introduced the concept of steady multilateral systems with two non-compatibility relations, and discussed its energy properties. Later based on the intervening principle of TCE and treated the economic society as a steady multilateral system, it has been proved that the intervening principle above is true. The kernel of this paper is the existence and reasoning of the non-compatibility relations in steady multilateral systems, and it accords with the oriental thinking model.

Influence Factor Analysis on Strength of Lime-Fly Ash Loess  [PDF]
Yufen Zhang, Zhiquan Zhang
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.56068
Abstract: Lime-fly ash loess is composed of fly ash, lime and loess. It is a new material in subgrade backfill. Main factors to influence the strength of lime-fly ash loess are age, amount of fly ash and lime, ratio of fly ash to lime (1:K), and moisture content. In order to observe the effect of each factor influencing the strength of lime-fly ash loess and find out the relationship between each other, this paper adopted orthogonal test design to conduct unconfined compression tests. The result shows that 90d strength can be considered to calculate the strength of lime-fly ash loess in practice. And the most important factor to influence the 90d strength of lime-fly ash loess is the amount of fly ash and lime, the second is moisture content, and then is the ratio of fly ash to lime (1:K). These achievements are significant to the design and application of lime-fly ash loess in subgrade construction of loess areas.
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