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In this paper, a kind of modified adaptive group recommender based on overlapping community detection (GROCD) is proposed. Different from existing recommenders, GROCD takes both of group members' preferences and their complex internal interactions into account. In this research, both of overlapping community integration strategy and contribution-based collaborative filtering are employed to explore group members' interests and provide the predicted group ratings on movies. The authors discuss the effectiveness of the proposed approach on Movielens dataset. The results show that the proposed recommender can achieve comparatively accurate prediction with a comparatively low computation complexity.

In SNS, users with different privacy concern levels exhibit different private information posting behavior. To investigate and contrast the effects of personal and interpersonal influence on private information diffusion for different levels of privacy concern of users, we establish a survival analysis model and examine influence factors, including micro-blog features, user features, and social network features. The findings indicate that these three types of factors are very important and have a significant impact on the diffusion time of private information, especially the social network features. The influence factors differ for users with different levels of privacy concern. The results aid in our understanding and prediction of users' performance in SNS, with implications for social marketing and so on.

With the 3G explosive growth, telecom operators pay more and more attention to traffic management. Based on the key elements analysis of traffic operation, the paper proposes the ATNE model of traffic management, which content four key element "application, terminal, network, experience", and it can provide valuable reference of traffic management strategy.

The paper reviews research achievement of multi-source information service system based on cloud computing both at home and abroad, and presents a multi-source information service system four-layer architecture. This system architecture is characterized by openness and user-oriented ideas.

With the approaching of Mobile Internet period, M-Business has been developing with a brilliant future, driving the industry developing and seizing the opportunity are the common aspiration of all participants. This paper deeply analysed M-Business value chain, extracted the key nodes of this chain as Mobile Operators, Content and Service Providers, Mobile Portals and Government. Finally, this paper gave some advice about the development of M-Business.

First, on the basis of analyzing the features, current situation and development trend of mobile TV industry, the paper indicates its technology reform, channel expansion and business model innovation brought by triple play. Second, it proposes building a "Xinhua-oriented mobile TV industry chain", and explores main strategies for the development of mobile TV: to create TIME strategy together with the telecom operators; to develop broadcast services under "pareto principle" to focus on unicast business under the guidance of the "long tail" to develop multicast business, so as to achieve the integration of new media; to create innovative content and business models and make full use of mobile TV interaction; to design outstanding mobile TV components with software vendors; to launch "Xinhua Video Phone" with handset manufacturers; and to launch "Xinhua Inside" with IT vendors, etc.

Aiming at research in mobile phone software supermarket, this paper introduced the definition and industrial chain of mobile phone software supermarket, as well as the comparison between mobile phone software supermarket, physical commodity supermarket and internet supermarket. More importantly, based on the analysis of consumer market and supply market, modeling in game theory was used to demonstrate the choices of each player involved. Last but not least, suggestion on business model was given for platform provider.

With the development of network technology and the increasing popularity of the network, the Internet Word-of-Mouth is gradually replacing its traditional counterpart. People increasingly prefer to collect product information using the network exchange in order to make consumption decisions. Involvement theory plays an important role in the theory of consumer behavior; it explains why people sometimes did not follow the rational model-information collection, screening, and assessment to do purchase decision. Researching the role of involvement to IWOM is significant to the development of marketing theory and effective marketing communications. This paper regards college students as survey subjects, focuses on the impact of variables of involvement to IWOM, and conducts the demonstration to get conclusions so as to recommend appropriate management recommendations to help the corporation better carry out the publicity and marketing of product.

With its billions of dollars to search engine providers, sponsored search has been one of the hot topics of electronic commerce not only in practice but also in academy in recent years. We present some main progresses in sponsored search theory, including auction mechanism and click fraud. We also propose some suggestions to the future research.

At present, the research on the problem of social information process has transferred from the qualitative descriptions to the quantitative assessments. And evaluation theories and methods has become the integral and important part with the theory of information process. This dissertation points out a theoretical model used at the level evaluation for the social information process, through analyses of connotation of convergence of Informatization and Industrialization and the simple comparisons and analyses for the severally including main methods.

Synchronization is a crucial task and big challenge for ultra-wideband (UWB) systems, especially in the presence of inter-symbol interference(ISI) and inter-frame interference (IFI). This paper proposes a blind synchronization and demodulation algorithm that is capable of mitigating ISI and IFI for noncoherent UWB system. Employing a series of codeword matching and averaging operations, the proposal can suppress interference and noise effectively. Moreover, it can acquire synchronization rapidly and improve the bit error rate (BER) performance significantly thanks to efficiently exploiting the observed signals. Simulation results demonstrate the substantial performance improvement compared to existing methods.

In this paper, firstly we establish the dynamic game model between owner and contractor in the bidding process of the construction project. Then we make analysis of the 24 situations when owner and contractor take different behaviors and demonstrate their payment function separately under different situation. Finally we make suggestions on what kind of strategy should the owner take in order to avoid the contractor submitting a low price malignantly and make sure the contractor performance better after the acceptance of the bid.

Spectrum is a valuable and scarce natural resource. Regulators assign spectrum usage rights to holders mainly by issuing licenses. With gradual introduction of spectrum trading and liberation, problems of tenure and assignment of spectrum licenses have attracted increasing attention. This paper does not only do lots of empirical research on existing license types in countries that have introduced spectrum trading, but also do in-depth study on the new license type- perpetual license that scholars have proposed. Then, it classifies spectrum licenses into unrenewable licenses, renewable licenses and perpetual licenses according to usage duration and renewal expectancy. Finally, both initial and secondary assignment processes of three kinds of spectrum licenses are put forward.

Traditional collaborative filtering algorithm is a weighted average prediction algorithm based on nearest neighbors' ratings. Besides similarity between users, trust and credit are also parameters to affect recommendation. This paper proposes a computational model of credit factor and then a collaborative filtering algorithm based on it. This model is based on trust factor and takes credit model as the basic elements. This proposed algorithm further improves the validity and accuracy of the recommendation.

Radio spectrum is a valuable and scarce natural resource and the introduction of spectrum trading can optimize the use and improve the efficiency of this scarce resource. This paper gives a brief analysis of incentives to spectrum trading from both macro and micro perspectives, in which it focuses on the relationship between initial spectrum assignment processes and secondary spectrum trading. Furthermore, it is found that initial spectrum assignment approaches in combination with the frequency fee system have an influence on the potential to gain windfall profits in secondary spectrum trading market and then affect incentives to spectrum trading. Finally, on the basis of earlier research results, some recommendations about the development of China's secondary spectrum market are put forward.

RFID (Radio Frequency Identification) technology has a huge market potential in China. Spectrum management of RFID will therefore play an important role. The specificities of frequency resource decide that the government must be responsible for spectrum management and ensure a sound market order. However, excessive control of government could hinder the development of RFID industry, which needs to be promoted by all participants. This paper considers the experiences of the United States and Japan. It proposes that the practice of RFID spectrum management in China should be guided by the government, led by enterprises, planned scientifically, unified in standards, and encourage innovations. During this period of financial crisis, the government should expand domestic demand, accelerate the restructuring and upgrading of China's industry, and promote the fast development of RFID industry.

Being at the primary stage, China mobile payment industry cries for a proper business mode between mobile operator and finance organization which are the keys in the industry chain. In this paper, we study this issue by using game theory. First, we present a three-person game model among these three players, i.e., government, mobile operator and finance organization. Then, we obtain the Nash equilibrium of this model. Finally, we propose some management insights and suggestions to mobile payment industry in China.

With the development of Internet, the concept of Web2.0, which kernel is personalization and active participation, has popularized gradually. Common consumers can product all kinds of digital products and upload on Internet. The boundary between producers and consumers are becoming obscure. Therefore, the value chain of electronic commerce, which originally starts with producers and ends with consumers, is bending progressively to become a loop of value system. Based on the actualities of electronic commerce, this paper innovatively puts forward a value loop model of it, which is helpful to forecast and analyze the trend of Internet electronic commerce.

This paper investigates China's efforts to develop its indigenous standard - TD-SCDMA and mainly focuses on the subsequent competition between TD-SCDMA & WiMax. By drawing upon actor-network theory (ANT), two counter-networks are setup and the competitions on technology, IPR, industry chain are presented. Furthermore, the social and institutional elements that effected their respective commercialization in China are also considered. Finally, the possible compromises of the two and respective suggestions on Telecom policies are proposed.

On the transformation of China's telecommunication operators, this paper builds a structure of the industry's ecosystem and value-net model, and further identifies key resources in this ecosystem, including standardization, core technology, customer base and brand names. The conclusion is that an operator's competitive advantage not only depends on its own strength, but also on its capability of collaboration. That is, whichever operator can best collaborate with others in the ecosystem, will also be able to best integrate resources, and thus establish a self-centered ecosystem and obtain a sustainable advantage.

The networks literature suggests a network's value increases in the number of locations it serves (the ldquonetwork effectrdquo) and the number of its users (the ldquoproduction scale effectrdquo). In this article we discuss one of the technology innovation in optical industry- photonic integrated circuit (PIC) technology. We show that, in one hand, consumers (traditional carriers) would be very careful to adopt a new technology or product in presence of network effect, which results in new technology adoption delays increasing in the size of traditional networks. In the other hand, if benefit from this new technology is not certain, dominant suppliers (equipment vendors) prefer waiting and collecting information to make further decision, so in some time network effect reduce innovation incentives.

3G has already been put into business, but the killer application of M-commerce has not been found out. The root cause is because the value transfer system of M-commerce has not been thoroughly researched or analyzed. Through a series of empirical study, this paper points out that the value loop in E-commerce is right the key problem of killer application in mobile value-added service. Accordingly we established a related model and gave the critical factors and methods for creating the M-commerce value loop; they are referable for the development of M-commerce.

This paper makes a discussion on supply chain finance from the angle of commercial banking business service in E-commerce environment. First of all, supply chain is briefly introduced, E-commerce is introduced too, and then impact of E-commerce on supply chain management, supply chain finance and its solution are emphatically discussed based on epsiv-commerce. Coming up is the research on designs and processes for account receivable financing.

This paper analyses the problems deal with the mobile commerce and enterprise information, discusses the key technology and technology the road map of enterprise information.