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The Research of Virtual Heart Parallel Computing Method Based on Cluster System

Author: GuoXiaoHua
Tutor: WangKuanQuan
School: Harbin Institute of Technology
Course: Computer Science and Technology
Keywords: Cardiac Electrophysiology Simulation Adaptive time step method Message communication model Parallel computing
CLC: TP338.6
Type: Master's thesis
Year: 2011
Downloads: 36
Quote: 0
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Abstract


Virtual heart is the integrated use of computer powerful computing power and graphics capabilities to simulate the real heart of the anatomical structures , electrophysiological characteristics . Myocardial cell model and the reaction-diffusion form virtual cardiac electrophysiology simulation mathematical model consists of ordinary differential equations , partial differential equations cardiac tissue model composed of two parts . With the myocardial cell model has become increasingly diverse , and more and more sophisticated model of heart tissue , increasing the size of the virtual heart simulation . The huge amount of computing has become a bottleneck in the development of the Virtual Heart Study . In order to improve the virtual heart model calculation speed , from fast numerical calculation method and parallel computing has carried out research . First , the reaction-diffusion process is relatively independent of the characteristics of the signal feature of cardiac myocytes and cardiac tissue model proposed a variation of the time step size adaptive numerical methods , and compared with the Runge-Kutta method in terms of efficiency and accuracy analysis . Secondly, the model for the three-dimensional heart tissue contains millions of myocardial cell model , a parallel computing method , two sub-regional decomposition method and the standard deviation of the weight adjustment method two domain decomposition method , and the acceleration performance analysis . Finally , in the 32 CPU cluster environment , using MPI technology variable time-step adaptive method , and the cardiac electrical activity of preliminary simulation research . The simulation results show that the proposed method to improve the computational efficiency of the heart tissue model by an order of magnitude , and be able to correctly simulate ventricular electrical conduction process . Virtual Heart Study provides an efficient means of research .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Electronic digital computer (not a continuous role in computer ) > A variety of electronic digital computer > Parallel computer
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