本文選題：水質(zhì)預(yù)報(bào)　切入點(diǎn)：并行計(jì)算　出處：《河北工程大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：海洋水質(zhì)預(yù)報(bào)的核心任務(wù)是快速準(zhǔn)確地預(yù)測未來海水環(huán)境狀況。隨著業(yè)務(wù)海洋學(xué)的發(fā)展,水質(zhì)預(yù)報(bào)系統(tǒng)所考慮的過程越趨完善,計(jì)算量也越來越大。基于單處理器的串行預(yù)報(bào)程序已漸不能勝任海洋水質(zhì)預(yù)報(bào)的任務(wù)。為此,將串行程序改為并行程序,在高性能集群計(jì)算機(jī)系統(tǒng)上運(yùn)行,已是大勢所趨。 本文利用消息傳遞接口(Message Passing Interface,簡稱MPI)技術(shù)對膠州灣水質(zhì)預(yù)報(bào)系統(tǒng)中串行的生態(tài)模式進(jìn)行了并行化處理,主要工作如下： 1.闡述了膠州灣水質(zhì)預(yù)報(bào)系統(tǒng)結(jié)構(gòu),主要針對水質(zhì)模式部分的設(shè)計(jì)模型以及代碼進(jìn)行了詳細(xì)的分析,在此基礎(chǔ)上,使用并行模式子區(qū)域劃分的方法。 2.分別采用聚合通信技術(shù)和非阻塞通信技術(shù)對原串行程序進(jìn)行了并行化處理,并編制相應(yīng)代碼。從代碼實(shí)現(xiàn)的角度來看,聚合通信方式編程簡單易懂,但不能達(dá)到通信與計(jì)算時(shí)間同步；而非阻塞通信方式能夠最大限度的達(dá)到通信與計(jì)算相同步,但代碼編寫相對要復(fù)雜。 3.對系統(tǒng)的并行化程序進(jìn)行了效能測試與評估。采用聚合通信方式,系統(tǒng)的運(yùn)行時(shí)間比串行程序的運(yùn)行時(shí)間可縮短29%,且并行效率最大可達(dá)55%；采用非阻塞通信方式,系統(tǒng)的的運(yùn)行時(shí)間可縮短35%,且并行效率最大可達(dá)88%。所以,非阻塞通信方式在對系統(tǒng)的并行化改進(jìn)中是很有優(yōu)勢的。 膠州灣水質(zhì)預(yù)報(bào)系統(tǒng)采用非阻塞通信方式對其進(jìn)行并行化處理,大大的縮短了運(yùn)行時(shí)間,有效的改善了水質(zhì)預(yù)報(bào)系統(tǒng)的預(yù)報(bào)能力。
[Abstract]:The core task of marine water quality prediction is to predict the future marine environment quickly and accurately. With the development of operational oceanography, the process of water quality forecasting system is becoming more and more perfect. The serial prediction program based on single processor is no longer competent for ocean water quality prediction. Therefore, it is the trend to change the serial program into a parallel program and run on a high performance cluster computer system. In this paper, the serial ecological model in Jiaozhou Bay water quality prediction system is parallelized with message Passing Interface (MPI) technology. The main work is as follows:. 1. The structure of water quality prediction system in Jiaozhou Bay is expounded. The design model and code of water quality model are analyzed in detail. On the basis of this, the method of sub-region partition of parallel model is used. 2. The parallel processing of the original serial program is carried out by using the aggregate communication technology and the non-blocking communication technology respectively, and the corresponding codes are compiled. From the point of view of the code realization, the programming of the aggregate communication mode is simple and easy to understand. But it can not achieve the synchronization of communication and computing time, and the non-blocking communication mode can maximize the synchronization of communication and calculation, but the code writing is relatively complex. 3. The efficiency test and evaluation of the parallelization program of the system are carried out. The running time of the system can be shortened by 29% than that of the serial program, and the maximum parallel efficiency can reach 55%, and the non-blocking communication mode is adopted. The running time of the system can be shortened by 35%, and the parallel efficiency can be up to 88%. Therefore, the non-blocking communication mode has the advantage in the improvement of the system parallelization. The water quality prediction system of Jiaozhou Bay adopts non-blocking communication to process it in parallel, which greatly shortens the running time and effectively improves the forecasting ability of water quality forecasting system.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：X834;TP338.6

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