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Trust plays an important role in helping social network user make appropriate decision from abundant social information about products. A variety of social review information (e.g. ratings, voting and tags) emerge with the huge number of products on the Web. How they are utilized for searching and finding appropriate item is investigated. In this paper we propose a user credibility calculation method,...
Cloud computing has become an important scientific computing and commercial application paradigm. There are many computing resources and data in public clouds, but there exist some threats caused by unreliable services due to malicious providers or unacceptably poor service performance. Traditional trust computing requires a high overhead and thus decreases the performance of a cloud system. To address...
Based on a previously detailed data mining about primary renewable sources concerning solar radiation and wind speed, the authors present some results related to reliability of supply using Bayesian networks (BNs). The paper focuses on how the structure and parameters of BN can be obtained from the data. A short review of learning methods, scoring function types and specific algorithms is included...
Muscle synergies have reached great popularity in the last years, to explain how the central nervous system (CNS) reduces the dimensionality of muscle activation in the execution of a specific motor task. The aim of the present paper is the quantification of the intra-subject and inter-subject variability related to the factorization of EMG data via muscle synergies. The activity of twelve muscles...
The assessment of board level solder joint reliability during thermal cycling is very important for electronic packages. During thermal cycling, the mismatch in Coefficient of Thermal Expansion (CTE) between the materials used in the package induces stress on the solder interconnects and results in deformation and stresses. Finite element tools are widely used for rapid design optimization and also...
The rapid improvement of systems that surround us such as automotive vehicles brings new challenges for system designers and manufacturers. New functionalities like advanced driver assistants leverage some responsibilities from the driver to an autonomous system. Being able to provide such functionalities requires a safety certification for the system, namely the reliability of the communication backbone...
The role of electronic packaging is becoming more important and now constitute a much bigger percentage of the development of package with high evolution due to strong and competing demands for increased functionality and performance, further miniaturization, heightened reliability, and lower costs. Various types of packages like BGA and Quad Flat No-Lead (QFN) are widely used. Ball Grid Array package...
Object tracking is an important capability for robots tasked with interacting with humans and the environment, and it enables robots to manipulate objects. In object tracking, selecting samples to learn a robust and efficient appearance model is a challenging task. Model learning determines both the strategy and frequency of model updating, which concerns many details that can affect the tracking...
To increase mobile ad hoc network reliability, virtually decrease the packets loss to zero, and to support multimedia communications multi-route is required. In order to ensure the availability of two routes, node density must be above a certain value. To the best our knowledge, this paper is the first paper that mathematically determines the required node density to ensure the availability of two...
Mathematical dependencies for calculation of main parameters of vacuum gripping devices have been derived with the purpose of increasing efficiency of devices developed for handling of flexible containers during filling with free-flowing products. Computer modelling of the process of gripping and holding of flexible containers made with air-penetrating materials with the help of vacuum gripping devices...
In this investigation the authors have conducted an experimental research into the information processing systems incorporated into up-to-date neural network computing devices. The research aims to study the computational processes running in such systems. The authors have addressed the issue of ensuring the target reliability indices of neural network computing systems built with the use of nanoscale...
Verifying that hardware design implementations adhere to specifications is a time intensive and sometimes intractable problem due to the massive size of the system's state space. Formal methods techniques can be used to prove certain tractable specification properties; however, they are expensive, and often require subject matter experts to develop and solve. Nonetheless, hardware verification is...
Modern mining approaches should be able to properly deal with the increased availability of structured data. Here we focus on the problem of processing streams of trees. Specifically, we cope with classification tasks. We show that by adopting a double concept drifting reaction mechanism in the context of a kernel-based ensemble of classifiers, it is actually possible to have an effective and efficient...
High performance computing (HPC) systems frequently suffer errors and failures from hardware components that negatively impact the performance of jobs run on these systems. We analyzed system logs from two HPC systems at Purdue University and created statistical models for memory and hard disk errors. We created a small-scale error injection testbed—using a customized QEMU build, libvirt, and Python—that...
The reliability life assessment of electronic packages is a key issue to ensure the mass production quality of packaging components. To meet the time-to-market and long term reliability requirements, using finite element to predict a precise life cycle of solder joints becomes the main trend of electronic packaging product development. Thermal cycling test is a standard test and has been widely used...
A vast majority of the existing crowd opinion aggregation models deal with independent opinions of the crowd workers, where the annotators (crowd workers) provide their opinions unanimously and these opinions are not visible to everyone. But in real life, it is seen that there are many applications in which an annotator can see others' opinions. As a result, there is a high chance that the opinion...
Modeling the dynamic, time-varying behavior of systems and processes is a common design and analysis task in the systems engineering community. A popular method for performing such analysis is the use of Markov chains. Additionally, automated methods may be used to automatically determine new system state values for a system under observation or test. Unfortunately, the state-transition space of a...
Aiming at the problem of large error between simulation data and empirical data. The paper based on the combination of empirical data and simulation data, put forward the research method of the new army ordnance equipment support needed analysis in wartime, build up the experimental core calculation model based on ammunition support demand analysis. Taking wartime munitions demand as an example, the...
In this search; Bayesian analysis of the two parameter Lomax distribution reliability has been considered, and the estimation has been obtained under logarithm loss function for three different prior distributions (Quasi distribution, Exponential distribution and Gamma distribution). they has been made under complete data analyses. The simulation study has been conducted to compare by mean squared...
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