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The capability of prognostics and health monitoring of spacecraft such as satellites and spaceships is of key importance for their correct operation and the success of their mission. Before launching, various experiments are usually carried out on the spacecraft to thoroughly examine its performance and reliability, resulting in a large amount of experiment/test data. During its operation in orbit,...
Telecare Medicine Information System enables patients to get healthcare services at home expediently and efficiently. Authentication and key agreement protocol suited for TMIS protect patient's privacy via the unsecure network. Recently, numerous protocols have been proposed intend to safeguard the communication between patients and server. However, most of them have high computation overhead and...
Energy and cooling cost is becoming the main cost of data centers. Many studies focused on how to schedule job and migrate Virtual Machine between servers to save energy. An accurate energy consumption model is the basic of energy management. Most past studies show that energy consumption has linear relation with resource utilization. We found that different servers have different energy consumption...
Energy cost becomes a major part of data center operational cost. Computer system consume more power when it runs under high workload. Many past studies focused on how to predict power consumption by performance counters. Some models retrieve performance counters from chips. Some models query performance counters from OS. Most of these researches were verified on several machines and claimed their...
As enterprising customers are increasing storage capacity at the growth of 50% every year, the storage of energy become to be a urgent problem that the IT management facing. The researching energy consumption of network storage system architecture and establishing energy consumption model which relates to system expansion and workload is the key point to solve the problem of energy consumption. This...
With the repaid development of multi-media and network, information are generated and spread quickly than before. New application such as search engine, video share depends on the scale and access speed of huge data set. Data-intensive computing became a hot point of computer science. In Data-intensive environments, data access ability is the bottleneck instead of computing ability. In this paper,...
As the latest development of the distributed storage technology, Cloud storage is the product of the integration of distributed storage and virtual technologies. Cloud storage is a method that allows you to use storage facilities available on the Internet. Relative to the current Commercial cloud storage file systems, introducing P2P network of interest groups put forward the idea of a P2P model based...
With the repaid development of multi-media and network, information are generated and spread quickly than before. The industry is expected to meet the needs by producing high performance CPU and high-density disk. But dramatic increase in energy requirements becomes a new challenging. Energy and human cost become the major parts of data center. More and more vendor provides efficiency products, such...
LZpack is a general file system benchmark tool conforming to POSIX.1. It provides an effective method to evaluate different file systems. It also offers reliable data to the developers who use POSIX.1 file system API to design applications. With the cluster testing structure, LZpack can make precise evaluations of file IO performance and file system metadata operation performance. This paper not only...
The quality of certificate/report is the most important thing for the measurement technology institutions as the final products in the process of metrological verification, calibration and test. This paper presents a dynamic management system for measurement certificate/report based on SOA. In accordance with the analysis of the measurement certificate/report elements, three aspects of the effectiveness...
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