In this paper, the backward two-dimensional nonlinear Klein-Gordon equation is solved by using a Lie-group approach. Because the solution does not continuously depend on the presenteddata, the inverse problem is famo...
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In this paper, the backward two-dimensional nonlinear Klein-Gordon equation is solved by using a Lie-group approach. Because the solution does not continuously depend on the presenteddata, the inverse problem is famous for seriously ill-posed. A numerical example of the backward nonlinear Klein-Gordon equation demonstrates that this method is applicable, and the computational cost is quite cheap. Although the recovery of a presently wave is from the final time and under a large noise imposed on the final time data, this algorithm still works effectively and accurately. These numerical results are rather important in the computations of backward nonlinear Klein-Gordon equation.
In this paper we present a covariance based tracking algorithm for intelligent video analysis to assist marine biologists in understanding the complex marine ecosystem in the Ken-ding sub-tropical coral reef in Taiwan...
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ISBN:
(纸本)9789898565044
In this paper we present a covariance based tracking algorithm for intelligent video analysis to assist marine biologists in understanding the complex marine ecosystem in the Ken-ding sub-tropical coral reef in Taiwan by processing underwaterreal-time videos recorded in open ocean. One of the most important aspects of marine biology research is the investigation of fish trajectories to identify events of interest such as fish preying, mating, schooling, etc. This task, of course, requires a reliable tracking algorithm able to deal with 1) the difficulties of following fish that have multiple degrees of freedom and 2) the possible varying conditions of the underwater environment. To accommodate these needs, we have developed a tracking algorithm that exploits covariance representation to describe the object's appearance and statistical information and also to join different types of features such as location, color intensities, derivatives, etc. The accuracy of the algorithm was evaluated by using hand-labeled ground truth data on 30000 frames belonging to ten different videos, achieving an average performance of about 94%, estimated using multiple ratios that provide indication on how good is a tracking algorithm both globally (e.g. counting objects in a fixedrange of time) and locally (e.g. in distinguish occlusions among objects).
Two models are herein presented to derive at-site hourly basedrainfall depth-duration-frequency (ddF) relationships by incorporating daily rainfall information. The model development is motivated by the desire to uti...
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An intercontinental network of supercomputers spanning more than 10000 miles andrunning challenging scientific applications was realized at the Supercomputing’99 (SC’99) conference in Portland, Oregon, USA using PA...
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A parallel 2d3v PIC-MCC (particle-in-cell plasma simulations and Monte Carlo collisions) code is developed with message passing language PVM to simulate the electron cyclotron resonance plasma source in this research....
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A parallel 2d3v PIC-MCC (particle-in-cell plasma simulations and Monte Carlo collisions) code is developed with message passing language PVM to simulate the electron cyclotron resonance plasma source in this research. This code has been run on a PC cluster with a cluster system we developed called "diskless remote Boot in Linux (drBL)", which is a centralized boot and management environment. By using drBL, it's easier for us to integrate some PCs to a cluster system. Once we have some computing power, with the grid technology, we can harvest more by sharing the computingresources with others. This is a new approach to harvest more computing power. With the PIC-MCC simulation of ECr plasma source, the results and benchmark fordifferent cluster architectures are given anddiscussed.
In this paper, we propose a p2p network based location search algorithm which can be used to establish connections in Internet telephony. By using the location search algorithm, the caller can identify the peer it is ...
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ISBN:
(纸本)9781424404636
In this paper, we propose a p2p network based location search algorithm which can be used to establish connections in Internet telephony. By using the location search algorithm, the caller can identify the peer it is calling. The algorithm is based upon the concept of gradient search and is applicable upon unstructured networks. It is inspired by a biological phenomenon called haptotaxis. The algorithm performs at par with dHT-based location search algorithms, however it is much more robust than such structured algorithms. We also present some initial analysis to explain the reason behind the superiority of the algorithm
Large amount of video data is stored anddistributed in wide variety of application. due to the fast video material increases, manage and query of video become more and more important. In this paper, we address a temp...
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A 3d two-phase flow numerical model based on the large eddy simulation is developed to deal with the free surface problems by using the surface capturing method. This numerical model is employed for simulations of 3d ...
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ISBN:
(纸本)9780889866829
A 3d two-phase flow numerical model based on the large eddy simulation is developed to deal with the free surface problems by using the surface capturing method. This numerical model is employed for simulations of 3d flow fields in a fish-bone-type fishway. The specific flow patterns induced by fish-bone-type obstructions at the bottom of the channel is illustrated. For assessment of fishway suitability, comparisons of flow fields at different swimming speeds of fishes are made to investigate the potential influences of the flow fields on the migration behaviors of fishes.
A 3d composite stent model, which consists of thestent, plaque, and artery wall, is generated to characterize stenttransient expansion anddeflection behavior using Finite ElementMethod (FEM) approach. Two types (flat...
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A 3d composite stent model, which consists of thestent, plaque, and artery wall, is generated to characterize stenttransient expansion anddeflection behavior using Finite ElementMethod (FEM) approach. Two types (flat and central-thicker) ofplaque models have been employed to evaluate the geometricaleffects of atherosclerotic artery on the cardiovascular stentdeployment system. Simulation results demonstrated that theartery wall sustained a higher value of stress near the distal endof stent for both plaque models. In addition, the dog-boningfactor increased significantly (more than 20-fold) and arteryinjury index was much higher for the central-thicker ***, the effects resulted from the foreshortening,recoil rate and expansion rate were much less profound for bothplaque models. However, the expansion rates for both plaquemodels did not meet the requirement of clinical *** study to include plaque rupture mechanics forovercoming the shortcoming of the current models is currentlyproceeding.
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