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Search Results: 1 - 10 of 64396 matches for " Yong Xu "
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Successful Factors and Prediction of Crowdfunding on WeChat  [PDF]
Yong Xu, Ni Zhu
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.84065
Abstract: Taking crowdfunding projects on WeChat for research object, including Tencent Charitable Foundation and Qingsongchou, empirical study has used the multivariate analysis of variance, logistic regression and data mining to analyse the influence factors of final funding and the result (success or failure), and then build a model to forecast the result. The empirical study indicates that user participation, user trust and project characteristics have significant influence on crowdfunding projects success. The forecast model based on data mining has good prediction accuracy.
Quaternion-Based Discriminant Analysis Method for Color Face Recognition
Yong Xu
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0043493
Abstract: Pattern recognition techniques have been used to automatically recognize the objects, personal identities, predict the function of protein, the category of the cancer, identify lesion, perform product inspection, and so on. In this paper we propose a novel quaternion-based discriminant method. This method represents and classifies color images in a simple and mathematically tractable way. The proposed method is suitable for a large variety of real-world applications such as color face recognition and classification of the ground target shown in multispectrum remote images. This method first uses the quaternion number to denote the pixel in the color image and exploits a quaternion vector to represent the color image. This method then uses the linear discriminant analysis algorithm to transform the quaternion vector into a lower-dimensional quaternion vector and classifies it in this space. The experimental results show that the proposed method can obtain a very high accuracy for color face recognition.
A Hybrid Key Management Scheme Based on Clustered Wireless Sensor Networks  [PDF]
Pengcheng Zhao, Yong Xu, Min Nan
Wireless Sensor Network (WSN) , 2012, DOI: 10.4236/wsn.2012.48029
Abstract: According to the weakness of session key construction based on node’s own location, we propose a hybrid key management scheme which based on clustered wireless sensor networks. The use of hierarchical thinking, reducing the amount of key storage and computing, while supporting network topology, dynamic key management for which aims to prevent leakage. Through analyzing, it shows that the scheme have certain advantages in key connectivity, security, communication and energy consumption.
The Effect of Different Price Promotion Ways on Consumers’ Purchasing Intention  [PDF]
Yong Zhang, Jiayue Deng, Yuxin Xu
American Journal of Industrial and Business Management (AJIBM) , 2017, DOI: 10.4236/ajibm.2017.710085
Abstract: Price promotion, as one of the most popular promotions on the Internet, has a certain influence on consumers’ purchasing intention. It is great significance to explore the relationship and related factors between price promotion and consumers’ purchasing intention.?The study explores the impact of two common kinds of online price promotion on consumers’ purchasing intention, and examines the moderating effects of product complementarity in the above relationship. The study finds that the interaction between complementary products and price promotion has a significant impact on consumers’ purchasing intention, mental account plays a mediating role in the process. Specifically, in the case of complementary products, perceived promotional risk has greater influence on consumers’ purchasing intention, and consumers tend to choose “price deduction over a given purchase amount”. Under the condition that the product does not exist complementary, perceived promotional benefit has greater effect on consumers’ purchasing intention, and consumers tend to choose “unveiling promotion price” promotion. The conclusion of this study enriches the theoretical research of the related online promotion, and also can help the network
Decision-Making in Dual-Channel Green Supply Chain Considering Market Structure  [PDF]
Yong-Mei Xu, Ping Zhang
Journal of Service Science and Management (JSSM) , 2018, DOI: 10.4236/jssm.2018.111011
Abstract: With the increasing awareness of environmental protection among consumers, green products are increasingly favored by the general public. The rapid development of e-commerce has increased the channels for consumers to contact and purchase green products. In this paper, consumers’ perceived differences in product greenness among different channels are considered and three models of manufacturer-dominated Stackelberg game, retailer-dominated Stackelberg game and Nash equilibrium with equal power are constructed based on the difference pricing between online and offline channels. Also, the results of dual-channel structure are compared with those of single-channel respectively. The results show that when the green R & D costs are relatively high, manufacturers and retailers are motivated to compete as channel leaders, but for the entire supply chain, Nash’s decision-making can improve product greenness and profitability of the supply chain. When green R & D costs are low, manufacturers’ profits are higher under asymmetric power supply chains and lowest under vertical Nash decisions. Under the three kinds of power structure, product greenness and manufacturer’s profit are higher than single channel under dual-channel structure. The comparison of retailer’s profit in dual channel and single channel depends on green R & D costs.
On Weighted Hadamard-Type Singular Integrals and Their Applications
Yong Jia Xu
Abstract and Applied Analysis , 2007, DOI: 10.1155/2007/62852
Abstract: By means of an expression with a kind of integral operators, someproperties of the weighted Hadamard-type singular integrals are revealed. As applications, thesolution for certain strongly singular integral equations is discussed and illustrated.
Nash Equilibria on Soft Information Control Games--Based on Banking Industry in China
Fei Xu,Yong Jiang
International Journal of Financial Research , 2012, DOI: 10.5430/ijfr.v4n1p84
Abstract: In the competition of banking sector in China, to maximize the amount of soft information control is an important goal. In an n-dimensional Euclidean space, there exists Nash equilibrium for two different banks in the competition of soft information control. Keeping the same competitive strategy is the best response to each other's actions of the two banks. Further analysis is based on the incomplete information dynamic game between various branches of the same bank. The Nash equilibrium solution for the first mover is to design strategy based on market information, while the followers’ optimal strategy is to imitate the first mover’s policy, whatever knowledge that they may obtain.
Photophysical Property and Photocatalytic Activity of New Gd2InSbO7 and Gd2FeSbO7 Compounds under Visible Light Irradiation
Jingfei Luan,Yong Xu
International Journal of Molecular Sciences , 2013, DOI: 10.3390/ijms14010999
Abstract: Gd 2InSbO 7 and Gd 2FeSbO 7 were synthesized first, and their structural and photocatalytic properties were studied. The lattice parameters and the band gaps for Gd 2InSbO 7 and Gd 2FeSbO 7 were 10.449546 ?, 10.276026 ?, 2.897 eV and 2.151 eV. The photocatalytic degradation of rhodamine B was performed with Gd 2InSbO 7 and Gd 2FeSbO 7 under visible light irradiation. Gd 2InSbO 7 and Gd 2FeSbO 7 had higher catalytic activity compared with Bi 2InTaO 7. Gd 2FeSbO 7 exhibited higher catalytic activity than Gd 2InSbO 7. The photocatalytic degradation of rhodamine B followed with the first-order reaction kinetics, and the first-order rate constant k was 0.01606, 0.02220 or 0.00329 min ?1 with Gd 2InSbO 7, Gd 2FeSbO 7 or Bi 2InTaO 7 as photocatalyst. Complete removal of rhodamine B was observed after visible light irradiation for 225 min or 260 min with Gd 2FeSbO 7 or Gd 2InSbO 7 as photocatalyst. The evolution of CO 2 was realized, and it indicated continuous mineralization of rhodamine B during the photocatalytic process. The possible photocatalytic degradation pathway of rhodamine B was proposed.
Mathematical Model of Dynamic Games of Imperfect Agency--Based on Conspiracy of SMEs and Bank Managers
Yong JIANG,Ruijie XU
Progress in Applied Mathematics , 2012, DOI: 10.3968/2660
Abstract: : In China, state-owned commercial banks have monopoly position on the banking loan market. This paper constructs a two-stage dynamic game model to analyze the conspiracy in decision-making of bank loans, based on the establishment of relationship lend between SMEs and managers in large banks. Results indicate the existence of an optimal equilibrium as the solution of conspiracy. A revised mathematical model analysis with relaxed assumption shows that: if the state-owned banks have the mastery of large amounts of capital, supervision of SMEs lending are weak, and bank manager has the control of complete information of enterprises, the conspiracy tendencies for both parties will be more obvious. The conspiracy based on relationship lends between banks and enterprises will greatly damage the interests of banks and extrude high-quality SMEs. Key words: Mathematical Model; Dynamic Game; Conspiracy;Relationship Lend
Effects of sophoricoside and genistein on biological characteristics of osteoblasts
Yong XU,Ning DU
Zhong Xi Yi Jie He Xue Bao , 2009,
Abstract: Objective: To observe the effects of sophoricoside and genistein on the biological characteristics of osteoblasts.Methods: Osteoblasts were isolated from parietal bone of the newborn SD rats (less than 24 hours) and cultured in minimum essential medium (MEM). The effects of different concentrations of sophoricoside and genistein (10, 1 and 0.1 μmol/L) on the bone formation of osteoblasts in vitro were observed by cell proliferation rate. Differentiation of osteoblasts was evaluated by detecting the activity of alkaline phosphatase (ALP) using 4-nitrophenyl phosphate disodium salt (PNPP) method and by measuring the mineralized nodiform dyed by alizarin bordeaux. And the activity of osteoprotegerin (OPG) promoters of human beings was tested by using gene cloning and reporter gene.Results: Sophoricoside at 1 and 0.1 μmol/L could promote the proliferation of osteoblasts (vs control group, P<0.05). Genistein at 10 μmol/L could inhibit the cell proliferation, while genistein at 0.1 μmol/L showed promotion to cell proliferation (vs control group, P<0.05). The activity of ALP of osteoblasts was increased by sophoricoside at concentrations from 0.1 μmol/L to 10 μmol/L, but genistein only at concentration of 0.1 μmol/L could make it. The total areas of mineralization of the osteoblasts in 10, 1 and 0.1 μmol/L sophoricoside groups increased by 73%, 138.6% and 114.3% as compared with the control group, respectively, but those in different concentrations of genistein groups decreased. The activity of LacZ was increased by sophoricoside at concentrations from 0.1 μmol/L to 10 μmol/L, as well as by genistein at concentration of 0.1 μmol/L.Conclusion: Sophoricoside can stimulate the proliferation, differentiation and mineralization of osteoblasts. And it shows no inhibition to bone formation of osteoblasts compared with genistein. Sophoricoside can also increase the activity of osteoprotegerin promoter and is more effective than genistein.
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