象限自差 的英文怎麼說
中文拼音 [xiàngxiànzìchā]
象限自差
英文
intercardinal deviation-
The object of the paper is wavefront aberrometer produced by nanjing university of aeronautics and astronautics and su zhou 66 vision - tech co., ltd. the principle of aberrometer are detailedly introduced, image processing and automatic track techniques are also researched. according to research result, relevant control software has been developed in this paper, the conceptions of aberration are firstly described, synchronously, image processing and automatic track system are analyzed
論文以南京航空航天大學與蘇州六六視覺科技股份有限公司合作研製開發的人眼波前像差儀為研究對象，系統論述了人眼波前像差儀原理，重點對其中的關鍵技術? ?圖像處理與自動跟蹤進行了詳細研究，並開發出了相應的系統控制軟體。There still have not mature standard, every research institution have his own point of view and develop the product for their own business needs, all of those system have much limitation, for example, they base on the technology of windows, the common use and expansibility is very limited etc. in our country, the research still begin now, most of the existing modeling system base on the structure modeling and can not sustain the new modeling standard such as uml etc. the author disscuss the object - oriented modeling support environment in this dissertation with the he lp of research result in recently years and the technology at present and in future, some modeling standard and views have been bringed forward, at the same time this dissertation has also introduced the umlware system which is the product of the reseach, including the technology of development for the umlware system and it " s strategies of modeling
面向對象建模支持環境研究及其工具的研製成為當今國際領域的研究熱點，何為優秀的面向對象建模支持環境，目前國際上並沒有統一的標準，各個研究機構對其亦持有不同的觀點，並根據自己的商業需要開發出符合自己特點的建模產品，這些系統仍存在著眾多的弊端，比如幾乎都是基於windows技術，通用性差，擴展性方面受到限制等。國內在這方面的研究仍處于起步階段，已有的建模系統大都基於結構化建模技術或者無法支持最新的面向對象建模技術如uml標準。本文根據作者近幾年的研究結果，結合目前和未來的技術從理論上探討了面向對象建模支持環境，提出了一些建模標準和觀點，並詳細介紹了基於這種研究成果下自行開發的面向對象建模支持系統umlware ，論述涉及該系統的研製技術、開發思路和建模策略。Based on the navier - stockes equation, the finite difference method was applied to variance the simplified n - s equation on cylindrical coordinate system. then, 3 - d model of the spiral flow locally generated in circular pipe with steady and axial - symmetry condition was founded. the ordinary iterative method of gauss - seidel was induced
太原理工大學碩士學位論文本文以局部起旋條件下的圓管螺旋流為模擬對象，從以速度和壓強為自變量的微分方程一navier一5tokes方程出發，利用有限差分法對柱坐標系下簡化后的n一s方程進行離散，建立定常的、軸對稱的三維計算模型。According to different water phenomena, we use two different method to produce waves source : the first method is by specifying the boundary conditions and initialization conditions, this method simulate the dam breaking, reflection and diffraction of water waves ; the second method is by specifying disturbance model, this method simulate water droplets, waterfall, waves of ship ; in the first part of this thesis, we discuss the prevalent methods of the simulation of water scenes, in the second part of this thesis, we describe the numerical methods of solving the shallow water equations using the finite difference method and the finite volume method respectively, in the third part of this thesis, we simulate some realistically liquid phenomena such as rain droplets, the waves of ship, dam breaking etc
產生水波首先要有波源，設置不同的波源便可以得到不同的水流情形，我們用兩種方法來產生波源：一種是通過設置邊界條件和初始條件產生，這種方法用於模擬潰壩波的反射、折射等現象；另一種是通過擾動控制產生，這種方法用於模擬雨滴、瀑布、船波等自然現象。本論文的第一部分我們討論了目前水動畫模擬常用的幾種方法；在第二部分討論了我們所使用的兩類數值方法：有限差分方法和有限體積方法；在第三部分我們模擬了雨滴、船波、潰壩波等一些水流現象。There are many plants that have the character of time - varying, large delay, large inertia in the process of production of modern power station such as the superheated steam temperature, the reheated steam temperature, the water treatment of boiler and the load regulation. some of them have the strong character of nonlinear and some of them are multivariable coupling systems it is very difficult to obtain good effect of control by conventional pid control. it is necessary to set up the mathematics models of controlled plants if applying control means of modern control theory such as self - adaptive control, optimal control ， decoupling control and predictive control. and these control systems have large calculation and bad character of real time in general. these disadvantages make them be not able to meet the need of real production process and limit the application of them in modern power station. now the generator units are developing towards large capacity and high parameters. many new kinds of generating electricity means are coming into being. the characers of production units of power station become more and more complex but the demand to quality of control becomes more and more strict. the new control means are in bad need to control them effectively
現代電站的生產過程中存在過熱汽溫、再熱汽溫、鍋爐水處理、負荷調節等許多大遲延、大滯后、特性時變的對象，它們中有些還是具有強非線性特性的對象或多變量耦合系統，採用常規的pid控制手段很難取得良好的控制效果。若應用現代控制理論中的自適應控制、最優控制、解耦控制、預測控制等控制手段，則需要建立被控對象的數學模型，而且往往控制系統的計算量大、實時性差。這些缺點使其很難滿足實際生產過程的需要從而極大地限制了其在現代電站中的應用。D finite element local analysis is done for hv porcelain post insulator by abaqus finite element software. the stress distribution of one - piece structure under dead weight, erection deviation, temperature change, wind load and short - circuited load is analyzed, which provides the scientific basis for security assessment of post insulator
以高壓瓷瓶支柱絕緣子為研究對象，採用abaqus有限元軟體進行三維有限元局部分析，分析了整體結構在自重、安裝偏差、溫度變化、風載以及短路電流載荷作用下的應力分佈，為支柱絕緣子的安全性評定提供了科學的依據。Also combining strategy management theory, this paper presents the analysis on both external environment ( including macroscopic environment, trade state, trade chance, challenges and prospect ) and internal conditions ( including resources, operation, competitive force ) on some qualitative and quantitative methods such as pest analysis, swot analysis, five - competitive force model, line chart model, value chain, etc. the conclusion is that external environment and the operative condition of donghua is well presently, it is competitive among competitors in this domestic field depending on its strong basement. but enterprise management upon the going one at the same time, there exists some defects such as the lack of market exploitation ability and human resource management, the jump to the track of information technology, the inchoateness of core competitive force, the lagging of financial management, the needing improve of enterprise culture and so on
本文以武漢東環車身系統有限公司為研究對象，結合戰略管理理論，採用pest分析、 swot分析、五種競爭力模型、折線圖模型、價值鏈等定量與定性的方法對其外部環境（包括宏觀環境，行業狀況，行業機會、威脅及前景）和內部條件（包括資源，經營管理，競爭能力）進行了分析，總結出東環公司目前外部環境和經營狀況良好，自身擁有堅實的基礎，在國內同行中具有一定的競爭實力；但同時公司經營管理中存在著市場開拓能力差、與信息技術脫軌、核心競爭力尚未形成、人力資源管理缺乏、財務管理體系滯后、企業文化急待改進等問題。Fde and dde have been extensively developed since 1959, and each branch has been set up a complete theory system. now, more and more scholars study fde and explore further developments. also, fde with infinite delay is one of the fields of great interest to people. in fact, fde with infinite delay has undergone a rapid development since 1870s. hale and kato gave a normal and set up the b phase space theory in 1978. under the basic theory, people studied the stability, boundedness and periodic solution of rfde. for example : in [ 4 ], huang qichang introduced the concept of uniformly forgetful functional, discussed the boundedness and stability of solution ; [ 5 ] - [ 8 ] discussed the existence of periodic solutions, generalized the results of rfde with finite delay. however, for nfde with infinite delay, few people discuss it, and many problems have not been solved. so there are some very interesting developments. lt is worth while generalizing the results of fde with fini te delay or rfde with infinite delay to nfde with infinite delay. because of the difficulty of infinite delay, we may discuss neutral volterra integro - differential equations, and obtain simple results
自1959年以來，無論是一般的泛函微分方程還是具體的微分差分方程，其發展是非常迅速的，在每一分支中都形成了一套完整的理論體系，如今越來越多的學者涉足這一領域探求更新的發展，無窮時滯泛函微分方程就是他們研究的主要對象之一。準確地說，無窮時滯泛函微分方程興起於19世紀七十年代， 1978年hale與kato提出b空間的公理體系。在此體系下建立了方程的基本理論，並研究了解的穩定性、有界性、周期解等問題，如[ 4 ]利用一致健忘的liapunov泛函討論了解的有界性和穩定性， [ 5 ] - [ 8 ]討論了周期解的存在性，推廣了有限時滯的相關結果。分享友人