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Nowadays, with the rapid development of distributed computing, message distribution has been more and more important to distributed systems. Kafka was developed to collect and distribute massive messages for distributed systems. It is a high-throughput distributed messaging system. Kafka can always keep stable performance even if it processes millions of messages per second. Messages are persistent...
During the past ten years, cloud computing gradually becomes mature which is a current research hotspot. OpenStack is currently one of the most popular open source cloud platforms that developed by Rack space and NASA. It provides some toolkits to deploy cloud environment and implement cloud infrastructure like Amazon EC2. In this paper, we describe OpenStack architecture in detail and introduce its...
With the rapid development of modern astronomical observational technology, the processing and analyzing of massive astronomical data bring us an unprecedented challenge. As an effective approach, Visualization Technology (VT) is becoming a hotspot for analyzing massive data. In this paper, in the lights of previous lieratures of visualization technology, we further discuss the possibilities of using...
Due to the high demands for productivity and quality of bearing and the shortage of traditional detection methods, this paper proposes an automatic detection system based on machine vision technique. The detection system uses digital image processing technology to process the images collected by CCD camera and finish identification for the surfaces of bearing quickly and accurately. Firstly, least...
The full capacity of roundabout is the maximum value of the sums of all entry flows. On the assumption that the traffic operation characteristics are remained unchanged which include critical gap, the minimum headway, the following headway and the turn-orientation proportion of each entry, the sum of all entry flows is the full capacity of roundabout when each entry flow is equal to the entry capacity...
Network-grid computing is widely adopted in complex data computing and distributed data processing. In order to construct loosely-coupled application, the scientific workflow technique was used to invoke distributed services and data. However, there are many drawbacks in current scientific workflow system such as the complexity of manipulation and the difficulty of system deploy. In this paper, aims...
Optical mark recognition (OMR) is a traditional data input technique and an important human computer interaction technique which is widely used in education testing. Aimed at the drawbacks of current OMR technique, a new image-based low cost OMR technique is presented in the paper. The new technique is capable of processing thin papers and low-printing precision answer sheets. The system key techniques...
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