oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 28 )

2019 ( 328 )

2018 ( 1787 )

2017 ( 1714 )

Custom range...

Search Results: 1 - 10 of 104532 matches for " XiaoGang Zhang "
All listed articles are free for downloading (OA Articles)
Page 1 /104532
Display every page Item
Spectra of subdivision-vertex and subdivision-edge joins of graphs
Xiaogang Liu,Zuhe Zhang
Mathematics , 2012,
Abstract: The subdivision graph $\mathcal{S}(G)$ of a graph $G$ is the graph obtained by inserting a new vertex into every edge of $G$. Let $G_1$ and $G_2$ be two vertex disjoint graphs. The subdivision-vertex join of $G_1$ and $G_2$, denoted by $G_1\dot{\vee}G_2$, is the graph obtained from $\mathcal{S}(G_1)$ and $G_2$ by joining every vertex of $V(G_1)$ with every vertex of $V(G_2)$. The subdivision-edge join of $G_1$ and $G_2$, denoted by $G_1\underline{\vee}G_2$, is the graph obtained from $\mathcal{S}(G_1)$ and $G_2$ by joining every vertex of $I(G_1)$ with every vertex of $V(G_2)$, where $I(G_1)$ is the set of inserted vertices of $\mathcal{S}(G_1)$. In this paper we determine the adjacency spectra, the Laplacian spectra and the signless Laplacian spectra of $G_1\dot{\vee}G_2$ (respectively, $G_1\underline{\vee}G_2$) for a regular graph $G_1$ and an arbitrary graph $G_2$, in terms of the corresponding spectra of $G_1$ and $G_2$. As applications, these results enable us to construct infinitely many pairs of cospectral graphs. We also give the number of the spanning trees and the Kirchhoff index of $G_1\dot{\vee}G_2$ (respectively, $G_1\underline{\vee}G_2$) for a regular graph $G_1$ and an arbitrary graph $G_2$.
Supercritical CO2-based solvents in next generation microelectronics processing
ZHANG XiaoGang,
ZHANG
,XiaoGang,Keith,P.,JOHNSTON

科学通报(英文版) , 2007,
Abstract: Large amount of chemicals and highly purified-water are needed in microelectronic manufacture. The ability of solutions to penetrate tiny spaces will become significantly more challenging as the feature size of semiconductor devices decreases to nanoscale dimensions and the functional complexity of integrated circuitries (ICs) ever increases. Supercritical fluids (SCFs) possess a unique combination of properties (no surface tension and gas-like viscosity) that can potentially be exploited for application in microelectronics manufacturing and processing in response to needs for material-compatible cleaning systems, small-dimension developing solvents, and low chemical-use processes. Recent microelec- tronics processes for cleaning and rinsing of patterned porous low-k dielectrics and drying of photo- resist in CO2-based solvents are the main focus of this review. Additional topics in supercritical fluid processing include spin coating of photoresists, development with nanoscale dimensions, metal deposition and silylation.
Supercritical CO2-based solvents in next generation microelectronics processing
XiaoGang Zhang,Keith P. Johnston
Chinese Science Bulletin , 2007, DOI: 10.1007/s11434-007-0002-x
Abstract: Large amount of chemicals and highly purified-water are needed in microelectronic manufacture. The ability of solutions to penetrate tiny spaces will become significantly more challenging as the feature size of semiconductor devices decreases to nanoscale dimensions and the functional complexity of integrated circuitries (ICs) ever increases. Supercritical fluids (SCFs) possess a unique combination of properties (no surface tension and gas-like viscosity) that can potentially be exploited for application in microelectronics manufacturing and processing in response to needs for material-compatible cleaning systems, small-dimension developing solvents, and low chemical-use processes. Recent microelectronics processes for cleaning and rinsing of patterned porous low-k dielectrics and drying of photoresist in CO2-based solvents are the main focus of this review. Additional topics in supercritical fluid processing include spin coating of photoresists, development with nanoscale dimensions, metal deposition and silylation.
Research on the Improvement of Competitiveness of Chain Business Enterprises with the System Theory  [PDF]
Xiaogang Yang
Open Journal of Business and Management (OJBM) , 2016, DOI: 10.4236/ojbm.2016.43051
Abstract: Chain business enterprises face increasing competition. With the system theory, the competitiveness structure of chain business enterprises is analyzed, and practical methods and measures for the improvement of their competitiveness are provided.
The Advantages and Measures of Constructing Logistics Strategic Alliance for Chain Marketing Enterprises  [PDF]
Xiaogang Yang
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.67077
Abstract: The results indicated that the logistics strategic alliance has obvious advantages and benefits to economies of scale, and building strategic alliance of logistics is an effective way for the chain marketing enterprises to achieve economies of scale, which can enhance their core competitiveness. In this paper, the author pointed out the specific measures of the chain marketing enterprises to construct and consolidate logistics strategic alliance.
Education Marketing Research  [PDF]
Xiaogang Yang
Theoretical Economics Letters (TEL) , 2016, DOI: 10.4236/tel.2016.65111
Abstract: “Education marketing” is a new concept used in high frequency interiorly in recent years, but it has significantly different interpretations in the educational circles and business circles, extremely easy to cause the misuse and mix, which is not conducive to the development and application of this new subject of marketing. The analysis of this paper shows that: there are four essential differences in the understanding of “educational marketing” in the education and business circles and two suggestions are put forward to solve the problem.
Three Important Applications of Mathematics in Financial Mathematics  [PDF]
Xiaogang Yang
American Journal of Industrial and Business Management (AJIBM) , 2017, DOI: 10.4236/ajibm.2017.79077
Abstract: This paper analyzes the basic connotation of financial mathematics, financial mathematics through research development, control theory, differential game theory and capital asset pricing model from stochastic optimal, and discusses three important applications of mathematics in the financial field.
On the Emergence, Development and Prospect of Financial Mathematics  [PDF]
Xiaogang Yang
Modern Economy (ME) , 2017, DOI: 10.4236/me.2017.89078
Abstract: Since its emergence in 1980s, financial mathematics has developed into an interdisciplinary subject with independent theoretical system. On the one hand, financial mathematics has become the key technology that can be seen everywhere in finance. On the other hand, the development of Finance provides an important platform for the application of mathematics. The purpose of this paper is to analyze and summarize the emergence and development of financial mathematics, and to analyze the future of financial mathematics.
Effect of feeding ratios on the structure and electrochemical performance of graphite oxide/polypyrrole nanocomposites
YongQin Han,Bing Ding,XiaoGang Zhang
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4646-1
Abstract: Graphite oxide (GO)/polypyrrole (PPy) nanocomposites (GPYs) were synthesized using in situ polymerization. The effect of the feeding ratios of pyrrole and GO on the structure and electrochemical performances of GPYs was investigated. The structure was characterized via Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The electrochemical performance was characterized via cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The results indicate that the more pyrrole is added to GO (with GO concentrations of 20% and 50%), the more agglomeration of both PPy and GO layers occurs. This is detrimental to the capacitance utilization of PPy. When the feeding ratio of GO:pyrrole is 80:20, PPys with nanofibrils are dispersed homogenously in/on the exfoliated layer of GO and the conductivity is enhanced. The capacitance utilization of PPy in a composite with a GO concentration of 80% (383 F/g) is higher than that of pure PPy (201 F/g), which indicates the presence of a synergistic effect between GO and PPy.
Enhanced electrochemical properties of manganese dioxde doped with Ag3BiOx
Yang Wenjian, Li Juan, Zhang Xiaogang
International Journal of Electrochemical Science , 2006,
Abstract: In this work, Ag3BiOx was prepared and characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrochemical properties of electrolytic manganese dioxide (EMD) cathodes doped with Ag3BiOx were studied by galvanostatic charge/discharge and cyclic voltammetry. The results indicated that the electrochemical performance of EMD electrode was effectively improved by doping of Ag3BiOx. EMD electrode doped with Ag3BiOx possessed remarkably higher discharge voltage, larger capacity and better reversibility than that of pure EMD electrode.
Page 1 /104532
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.