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This paper proposes a combination of data mining and natural language processing technology, try to analyze students' learning behavior and content in MOOCs interactive part, to dig their learning interest, difficulty, tendencies, to evaluate their homework effect, through the interaction between teachers and students, students posting, homework or answer content, preventing of cheating behavior,...
Traditional reliability analysis of complex machinery involves statistical modeling of historical data on part failures from warranty claims, using distributions from exponential family such as the Weibull or log-normal distribution. When observed failures (in one or more parts) across a population of machines exceed the number expected based on such a model, this may serve as an early warning of...
Aiming at the limitation that the interruption event recordings are simply used to calculate the reliability indexes in the reliability management of distribution network at present, this paper proposes a practical method of reliability weak links mining for distribution network based on multidimensional analysis. Firstly, a complete multidimensional cube model of interruption recording is built according...
Emerging technologies such as the Internet of Things generate huge amounts of network traffic and data which lead to significant challenges in a) ensuring availability of resources on-demand, b) recognizing emergent and abnormal behavior, and c) making effective decisions for efficient network operations. Network traffic data exhibit spatiotemporal patterns. Learning and maintaining the currently...
To solve united process customization and collaboration problems of various organizations, service process models fragmentation approaches based multiple BPEL execution engines were proposed. Firstly, a whole consistent model is partitioned as several self-contained implementation sub-chips which are sent to a number of BPEL execution engines respectively based on the different organizations and roles...
One of the fundamental challenges for Peer to Peer (P2P) systems is the ability to manage risks involved in interacting and collaborating with prior unknown and potentially malicious parties. Reputation-based trust management systems have proven to be essential to enforcing cooperative behavior in P2P networks. However, in many existing reputation-based trust models, the validity of peers' trust valuation...
The information technology is rapid growing in e-era, service providers introduced the convenient self-service technologies (SSTs). These new technologies can increase service efficiency and save cost mainly due to the fact that the customers can complete their check-in procedures by themselves. However, the introduction of SSTs was not widely utilized immediately. Therefore, the major challenge presented...
Asynchronous discussion forum can provide a platform for online learners to communicate with one another easily, without the constraint of place and time. This study explores the analysis process of online asynchronous discussion. We focus upon content analysis and social network analysis, which is the technique often used to measure online discussion in formal educational settings. In addition, Soller's...
To evaluate security in the context of software reliability engineering, it is necessary to analyse security problems, actual exploits, and their relationship with an understanding of the operational behaviour of the system. That can be done in terms of the effort involved in security exploits, through classic reliability factors such as calendar and inservice time, etc. Existing studies focus primarily...
There are working, fail-safe and fail-dangerous states in safety-critical manufacture systems. This paper presents three typical safety-critical manufacture system architecture models: series, parallel and series-parallel system, whose components lifetime distributions are general forms. Also the reliability related indices, such as the probabilities that the system in these states and the mean times...
An improved function block based redundancy approach is proposed in this paper. The structure, link organization and data synchronization of improved function block are described. Furthermore, the non-redundancy model, the corresponding device-level redundancy model and improved function block based redundancy model are analyzed in quantitatively. For 1-0-2 type system, improved function block based...
FPGAs are applicable to implementation of fault tolerant systems due to their reconfigurability. Such fault tolerant systems can be classified according to recovering methods: fail-soft and standby-redundant systems. In this work, we propose a probabilistic model for both FPGA-based fault tolerant systems, and analyze the reliability and performance of the systems. Analytical results show that there...
Research on psychological contract theory has developed originally from organizational behavior, human resources management to the new research area of marketing and other related field. Based on the relative maturity of the two former areas, applied research of psychological contract in marketing especially in the brand relations has become a new direction for psychological contract study and at...
We identified in-role and extra-role customer service and developed the scale for each based on Chinese retailing industry. Evidence suggested that both in-role and extra-role customer service were positively associated with customer satisfaction and loyalty. Opposite to our assumption, the in-role customer service had a stronger effect on customer satisfaction and loyalty than extra-role service...
In order to solve the problem of trust in C2C e-commerce better, a history and future information based trust model is proposed in this paper. In this model the historical evaluation and future information are all considered. Thus, the entitiespsila historical behaviors are reflected in the trust value, and the starvation effect is prevented effectively. Based on the research achievements of trust...
Life cycle cost is the total cost incurred in the life cycle of a product, including design, development, production, operation, maintenance, support and disposal. Life cycle cost analysis can help engineers to identify equipment and process selection not on the initial purchase cost but rather on the total cost. A reasonable life cycle cost model can lead to a reliable design. In this paper, several...
The running equipment of industrial system may be affected by not only the conditions of the system but the operating state itself, so that the risk of equipment failure was considered as dynamics. During researching the possibility and severity of the failure risk, it is necessary to understand and investigate the dynamic characteristics of equipment failure in the system life cycle. In this article,...
Current work in digital preservation (DP) is dominated by the ldquoOpen Archival Information Systemrdquo (OAIS) reference framework specified by the international standard ISO 14721:2003. This is a useful aid to understanding the concepts, main functional components and the basic data flows within a DP system, but does not give specific guidance on implementation-level issues. In this paper we suggest...
The traditional FMEA method cannot describe the complex system clearly nor serve well for design of system when face to complex system. Aim at these questions, the FMEA method based on functional modeling has been put forward and given its process of analyzing. Take some warship voyaging system for example, analyzing the complex system by FMEA method based on functional modeling and validating the...
On the basis of psychological contract studies at home and abroad this paper analyses service enterprises and draws a psychological contract model for the service enterprise and customer through defining customer psychological contract concept under the marketing situation. Also, it explores the composition of various structural dimensions. It remains to see if contract model can be applied to service...
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