In order to select proper ground improvement method for this kind of special soil , the flac numerical software was used to analyze the stress train when treated by different methods 為合理選擇該類型軟土的地基處理方案,結(jié)合實際工程,運用flac數(shù)值分析軟件對濕軟黃土地基不同處理情況下的應(yīng)力應(yīng)變進行了模擬,得出合理結(jié)論。
The multi - branchout with the pipeline further complicates the calculation . the successful development of numerical software is one of achievements of this research project . this software will provide facility for the optimization on further constructed pipeline 管道的多點分輸,使得計算更為復(fù)雜,計算程序的編制是本課題完成的又一成果,程序的編制為今后從管理者角度探討此類管道建設(shè)的優(yōu)化問題提供了便利。
For the high - precision - oriented manipulator the accuracy is the crucial performances target . so the error sources is given a full consideration from the performances target . so the error sources is given a full consideration from the geometric errors , and combined with the characteristic of the micromanipultor the error model which can represent the accuracy of the micromanipulator , then the accuracy index is difmed and the relations between the errors and the mechanism parameters have been given by numerical software and the conclusion drawn out may act as the guide of the development of the trial prototype of the micromanipulator 面向高精度操作的微動機器人,精度是其最重要的性能指標。論文從幾何誤差出發(fā),全面考慮誤差來源,并結(jié)合微動機器人的特點,建立起反映微動機器人精度的誤差模型,定義了評價這些誤差的精度指標,并運用數(shù)值分析軟件分析了誤差與機構(gòu)參數(shù)之間的關(guān)系。所得結(jié)論可用于指導(dǎo)微動機器人實驗樣機的研制。
The application of parallel computing cannot exist without the support of related software . however , the design of a high - performance parallel program usually requires much more efforts than a sequential one , especially in case of complex problems . therefore , there is an urgent need of the development and improvement of high - performance numerical software 并行計算的應(yīng)用離不開并行軟件的支持,在新的科學(xué)計算形勢下,人們對高性能數(shù)值軟件的嚴重依賴和迫切需求基于這樣一個事實:并行數(shù)值程序的設(shè)計遠比串行程序設(shè)計來得困難,尤其面對復(fù)雜應(yīng)用問題時,大規(guī)模并行數(shù)值程序的開發(fā)和性能優(yōu)化非常具有挑戰(zhàn)性。
Particularly , the established form , efficiency and methodology and principles of petsc , give us a proper direction in numerical software development which is extremely important . with the explicit intention , the main contributions of this dissertation are : give a general description of the research background . the main research content are classified as numerical modeling , programming and software design 以petsc為主線,本文的主要工作及貢獻包括: ?對當前高性能數(shù)值軟件領(lǐng)域的研究內(nèi)容、現(xiàn)狀及發(fā)展趨勢做了較為詳細的調(diào)研與分析整理,歸納了數(shù)值建模與算法研究、程序設(shè)計與性能優(yōu)化、軟件開發(fā)思想與系統(tǒng)設(shè)計等三大數(shù)值軟件研究范疇。
Developing high - performance numerical software is a difficult task . it needs deliberate efforts from design to implementation , which often takes a long period of time . under this condition , obtaining technical and empirical knowledge through understanding , using and analyzing some existing well - designed software has become a shortcut to achieve our goal 在這種情況下,了解、使用、解構(gòu)剖析一些已有的優(yōu)秀數(shù)值軟件成果,以獲取在開發(fā)經(jīng)驗及技術(shù)方面更多的認識,成為了我們迅速提高數(shù)值軟件開發(fā)水平的一條捷徑。
First of all , for uncertain systems and state - delayed uncertain systems , the residual generators are constructed based on full - order filters , and the fault detection and isolation problems for these two classes of systems are reduced to h filtering problems by using h control theory . the fault detection filter design is formulated as convex optimization problem subject to lmi constraints in terms of linear matrix inequalities , which can be solved readily by using standard numerical software 首先,針對非時滯不確定系統(tǒng)和具有狀態(tài)時滯的不確定系統(tǒng),采用全階濾波器構(gòu)造殘差產(chǎn)生系統(tǒng),利用h控制理論將這兩類系統(tǒng)的故障檢測與分離問題轉(zhuǎn)化為h濾波問題,采用線性矩陣不等式技術(shù)將魯棒故障檢測濾波器的設(shè)計轉(zhuǎn)化為具有線性矩陣不等式約束的凸優(yōu)化問題,可利用標準的數(shù)學(xué)軟件求取。