In a cluster or a database server system, the performance of some data intensive applications will be degraded much because of the limited local memory and large amount of interactions with slow disk. In high speed ne...
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In a cluster or a database server system, the performance of some data intensive applications will be degraded much because of the limited local memory and large amount of interactions with slow disk. In high speed network, utilizing remote memory of other nodes or customized memory server to be as second level buffer can decrease access numbers to disks and benefit application performance. With second level buffer mode, this paper made some improvements for a recently proposed buffer cache replacement algorithm-LIRS, and brings forward an adaptive algorithm-LIRS-A. LIRS-A can adaptively adjust itself according to application characteristic, thus the problem of not suiting for time locality of LIRS is avoided. In TPC-H benchmarks, LIRS-A could improve hit rate over LIRS by 7.2% at most. In a Groupby query with network stream analyzing database, LIRS-A could improve hit rate over LIRS by 31.2% at most. When compared with other algorithms, LIRS-A also show similar or better performance.
Different realistic humanoid motion can be used in vary situations in animation. It also plays an important role in virtual reality. In this paper, we propose a novel method to generate different realistic humanoid mo...
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3D models are a new kind of cross-media resource which can be frequently seen in the network. Since the amount of them is very huge now, content-based retrieval can help to recognize a certain object or retrieve simil...
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3D models are a new kind of cross-media resource which can be frequently seen in the network. Since the amount of them is very huge now, content-based retrieval can help to recognize a certain object or retrieve similar ones from the giant database. This paper presents a new method for deriving 3D moment invariants and uses them as shape descriptors for the representation of 3D models. They are insensitive to surface noise and can be used in pervasive environment conveniently. We also illustrate how to build up experimental system and simulate 3D shape retrieval in wireless environment
The Control Laws Expert Assistant for Rotorcraft (CLEAR) project, which is being performed at Temple University and the Boeing Helicopters Company, is described. CLEAR will assist flight control engineers to design a ...
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The Control Laws Expert Assistant for Rotorcraft (CLEAR) project, which is being performed at Temple University and the Boeing Helicopters Company, is described. CLEAR will assist flight control engineers to design a specific set of flight control systems. The resulting interactive knowledge-based system will analyze mathematical models representing rotorcraft and will design any compensation required to enable the system to meet specifications. There are two major roles that CLEAR plays in the design of a rotorcraft flight control system. First CLEAR determines what kind of compensation, if any, is needed. It then places the compensator at an appropriate location within the system and designs the required compensator. The authors focus on the work being performed at Temple University to give CLEAR its design capability. The rationale for using a knowledge-based system is presented, and the CLEAR architecture is described.< >
This paper addresses the problem of how to develop an expert system that is able to design or to assist in the design of a control system. The discussion includes how to structure the expert system, how to choose the ...
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