象散象差 的英文怎麼說

中文拼音 [xiàngsǎnxiàngchā]
象散象差 英文
astigmatic aberration
  • 散 : 散動詞1. （由聚集而分離） break up; disperse 2. （散布） distribute; disseminate; give out 3. （排除） dispel; let out
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  1. Astigmatic image error

    象散象差
  2. With the appearance of component object mode, it is possible to realize the multi - tier application system, which can easily handle the problems appeared in the 2 - tier architecture, such as poor maintainability and security, high cost, weak retractility and so on

    組件對象模型的出現使多層的分散式應用系統成為了可能，從而較好地解決了兩層客戶端/服務器結構中存在的維護性差、安全性差、運行成本高和不可伸縮等問題。
  3. The globalization has become the seedbed for terrorism which accompanies the globalization all the way : it accelerates the difference between the south and the north, the polarization of the wealth ; hastens the conflicts of different cultures and religious beliefs ; speeds up the promotion of high technology and advanced weapon technology, which modernizes the terrorist ’ s weapons ; places the western countries under the stress of shifting their development priority to the east, as a result, worsening the “ modernization frustration ” situation in underdeveloped countries. america ’ s short - sighted behaviour may be the remote cause for the wild

    全球化成為滋生恐怖主義的新溫床，恐怖主義是全球化的一種伴生物:全球化加劇了南北差距和貧富分化;全球化促進不同文化、宗教觀念的沖突;全球化加速了高科技的普及與先進武器技術的擴散，使得恐怖手段日益現代化;全球化使西方發展模式「東移」的壓力和速度加大，使發展中國家出現「現代化挫折」現象加劇;美國缺乏遠見的作為是全球化進程中的恐怖主義泛濫的重要誘因。
  4. In order to make clear the changing situation about various meteorological element fields during the heavy rain. the diagnostic analysis in three aspects was done in this text : the vapor conditions, in which the difference of the temperature and dew point, relative humidity, vapor flux and the divergence of vapor flux were discussed ; the dynamic and thermodynamic conditions, vorticity, divergence and vertical velocity were analyzed ; the vertical layer condition, which included potential temperature, static stability, convective ( potential ) instability and the vertical profile of eight physical fields over the observatory of shenyang

    為了弄清這次暴雨過程各氣象要素場的演變情況，分三方面對暴雨的水汽條件（使用了溫度露點差、相對濕度、水汽通量和水汽通量散度） 、動力條件（使用了散度、渦度和垂直速度）和垂直層結條件（使用了位溫、靜力穩定度和潛在不穩定度以及沈陽單站的8個物理量的垂直廓線）等的變化，分別進行了診斷分析。
  5. 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。
  6. Two typical examples analyses are conducted for the average conditions both of winter and summer climates under vapor diffusion and air leakage. a further discussion is set forth to determine the main factors that the moisture accumulation in wall is affected. it is found that the factors are the relative humidity at the wall surface, indoor temperature, permeability, air pressure difference and rate of the infiltrative or exfiltrative airflow

    本文首先研究了墻體內的濕氣遷移過程，詳細分析了濕積累現象形成的原因，通過對夏、冬兩季平均氣候下墻內溫度、水蒸氣壓力、相對濕度及濕積累在僅有擴散、擴散與空氣滲透同時存在等情況所作的具體計算，發現墻內、外表面的相對濕度、室內溫度、滲透率、空氣壓差以及空氣的滲流速度是影響墻內濕積累的主要因素。
  7. The main part and key technique of the cpa system is study : the generation of the femtosecond laser pulse is study, the modulation and maintenance of the ti : s laser is learned ; the types of the measurement for ultrashort laser pulse is generalized and the interferometric autocorrelation is expatiated ; the varieties of the stretchers is sum up and aberration - free stretcher is calculated and optimized to improve the stretching ratio ; the pulse selection is analyzed and a single pulse can be selected successful from the pulse train at a repetition rate of 82mhz ; the kinds of the amplifier in cpa system is gathered up, the eight - pass pre - amplifier and a good many effects in it is investigated. finally, the second, third and fourth - order dispersions in cpa system is analyzed systemicly, and the according means for dispersion compensation is worked out

    對cpa系統的主要環節及關鍵技術進行了研究：掌握了鈦寶石激光器的調節和維護技術，較深入地研究了飛秒激光脈沖產生的機理，其中對群速色散、自相位調制、自鎖模等問題進行了詳盡的分析；總結了超短激光脈沖的測量技術，重點研究了干涉自相關測量法；在總結展寬器類型的基礎上，對無象差展寬器進行了理論計算、優化設計，提高了展寬倍數；深入論述了脈沖列的選單問題，熟練掌握了脈沖選單技術。
  8. This paper proposes the occasional coupling synchronization scheme of the active - passive decomposition ( active - occasional coupling ). this scheme consists of synchronization and autonomous phases. in the former, the synchronization scheme is used to synchronize the drive and the response systems ; in the latter, small errors will lead to the two systems separated from each other and desynchronization. but if the synchronization phases are large enough, the full synchronization will be obtained. the synchronization condition is discussed theoretically. the spatiotemporal chaos in coupled map lattice system is achieved and the synchronization condition is given. moreover, the relation between the synchronization phases and the coupling strength is investigated numerically

    提出了離散系統中的主動-間隙耦合同步方法.該方法由同步相和自治相組成.在同步相，同步方案使得混沌系統趨于同步，而在自治相，兩系統間的誤差將迅速放大，導致失同步.但只要同步相足夠大，最終可實現系統的準確同步.還從理論上討論了同步條件，並利用該方法實現了耦合映象格子時空混沌系統中的混沌同步，給出了同步條件以及同步相與耦合強度的關系
  9. Finite difference method can deal with regular boundary conditions. in this paper, we discrete the water domain into rectangular meshes, and simulate the propagation, reflection and diffraction of water waves. we just specify waves source, the movement of water waves can be simulated automatically

    有限差分方法能夠處理具有規則邊界水域的水流現象，在本文中，我們把求解的水域離散成結構矩形網格，對水流的折射、反射、繞射等水流現象進行了動畫模擬，我們僅僅指定產生水流動畫的波源，水流動畫的細節均由數值方法產生，不需要人工的干預。
  10. Finite volume method can deal with irregular boundary conditions. in this paper, we discrete the water domain into triangular meshes, and simulate dam breaking, water droplets. the same as finite difference method, we just specify waves source, the movement of water waves can be simulated automatically

    有限體積方法能夠處理具有不規則邊界水域的水流現象，在本文中，我們把求解的水域離散成無結構三角形網格，對潰壩問題、雨景等水流現象進行了模擬，和有限差分方法一樣，我們僅僅指定產生水流動畫的波源，水流動畫的細節均由數值方法產生，不需要人工的干預。
  11. Setting forth the concept of scattering model mismatch, we make a detailed analysis of their effects on radar imaging, that is, resulting in one - and two - dimensional artifacts or dispersion in radar image which we view as a kind of focus - out effect on the focusing process in radar imaging

    論文闡述了目標散射模型失配的概念及其產生根源，針對其在isar成像中造成的兩維模糊展布現象，提出了二維等效散焦誤差的概念，確立了以散焦效應的觀點來系統描述和分析上述現象的理論基礎。
  12. In chapter one, we propose a new mixed method called characteristics mixed finite element method for a convection - dominated diffusion problems with small parameter e : we handle the convection part whth backward difference scheme along the characteristics, obtain much smaller time - trunction errors and avoid numerical dispersion on the front of the peak curve of the flow : we use a lowest order mixed finite element method to deal with the diffusion part, so this scheme can approximate the unknow function and its following vector with high accuracy at the same time

    第一章中我們對小參數對流占優擴散問題提出了新的數值方法? ?特徵混合有限元方法，即對方程的對流部分採用沿特徵線的後退差分格式求解，以保證較小的截斷誤差限並避免了在流動的鋒線前沿數值彌散現象的出現；對流動的擴散部分採用最低次混合元方法求解，以保證格式對未知函數及伴隨向量的同時高精度逼近。由於該方法中檢驗函數可取分片常數，此格式在某種意義上具有局部守恆性質。
  13. As the fact that nanoparticles from orginal reaction solution have much wider size distribution with deviation larger than 15 %. size - selective precipitation was applied to sharpen the size distribution of those nanoparticles. a size series of qds with improved monodispersity can be achieved just from one sampling solution

    3 .由於生長原液中納米粒徑分佈的單分散度較差的現象，採用合成后尺寸選擇性沉澱工藝對納米顆粒尺寸分佈進行銳化，能夠從一個樣品中選出尺寸大小分佈，單分散性明顯改善的納米量子點。
  14. The new method is a combination of characteristic approximation to handle the convection part, to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion, a smaller time truncation is gained at the same time, and a mixed finite element spatial approximation to deal with the diffusion part, the sealer unknown and the adjoint vector function are approximated optimally and simultaneously

    此方法即為對方程的對流項沿流體流動的方向即特徵方向進行離散，從而保證格式在流動鋒線前沿逼近的高穩定性，消除了數值彌散現象，並得到了較小的時間截斷誤差；另一方面，對方程的擴散項採用混合元離散，可同時高精度逼近未知函數及其伴隨向量函數，理論分析表明，此方法是穩定的，具有最優的l ~ 2逼近精度。
  15. Secondly, the human body is simulated by a model with inhomogeneous dielectric constant and conductivity hi the fdtd program to calculate the effect of stable plane wave to the human body, hi the same time the mode can be used hi ( fd ) 2td programmed to calculate the effect of electromagnetic pulse to the human body by using debye parameter

    主要包括以下幾部分內容：首先，編制fdtd （時域有限差分法）和（ fd ） ~ 2td （色散時域有限差分法）程序，並驗證了這兩個軟體的有效性。其次，建立了解析度分別為4 . 25mm和1 . 31cm的實際人體電磁參數模型和色散電磁模型，建模過程中採用了圖象處理技術。
  16. Abstract : iterative learning control is an effective approach to the control of processes that are repetitive in nature. in this paper, an open - closed - loop pi - type iterative learning control scheme for the precise tracking control of a class of discrete nonlinear time - varying systems over a finite time interval is presented. the scheme updates control input with tracking errors of both current and last iterations simultaneously. sufficient and necessary conditions which guarantee the convergence of the scheme are given and then proved with inductive method. finally, the conditions are verified with simulation results

    文摘:對于具有重復運動性質的對象，迭代學習控制是一種有效的控制方法.針對一類離散非線性時變系統在有限時域上的精確軌跡跟蹤問題，提出了一種開閉環pi型迭代學習控制律.這種迭代律同時利用系統當前的跟蹤誤差和前次迭代控制的跟蹤誤差修正控製作用.給出了所提出的學習控制律收斂的充分必要條件，並採用歸納法進行了證明.最後用模擬結果對收斂條件進行了驗證
  17. Because localization of vrml2. 0 on moving functions and more embodiment of vitality and reality, i use java language. bcause it has points of mutuality, safety and credibility, smallness and agility, facing object, distributed network communications, multithreading and so on, and makes up difference between bandwidth and m anagement ability, and transmitts rich and colorful and alternant media on actual bandwidth condition

    由於vrml2 . 0版本語言在運動功能上的局限性，同時也為了更好體現逼真性、生動性的特點。我引入了java語言。由於它具有廣泛移植性，面向對象，交互性，分散式的網路通信，安全可靠，小巧靈活，多線程等一系列優良性能，同時彌補了帶寬與處理能力之間的差距，可在當前的帶寬狀態下傳送豐富多彩及互動式媒體。
  18. In this thesis, through the analysis of the whole economy of these two regions and their own important economic elements since the large scale development of the western region was carried out in 1999, it was found that the economic gap between these two regions was not narrowing, the spillover effects of the western regions economy and the polar effect of the eastern region ' s economy was conspicuous, but the sign of the gradient transfer was not evident

    本文通過對1999年西部大開發進入實際階段以來東、西部整體經濟和各項經濟要素的分析，發現東西部經濟與東部經濟的差距並沒有縮小，西部經濟的擴散效應和東部經濟的極化效應明顯，梯度轉移跡象並不明顯。
  19. In this essay, firstly the author analyzes the predictability of time series from china ' s stock exchange using three kinds of methods : arma model, neural network model and non - parametric estimation and gives evaluation on their performances while at the same time puts forward some conclusions deserving attention from both stock exchange supervising department and stock traders. secondly, the author examines the assumptions closely on which the above - said methods base and gives a detailed discussion on them, especially using garch model to test quantitatively the stability of china ' s stock exchange, afterwards drawing the conclusion that it is hard to make accurate prediction of price or return rate of china ' s stocks for none of the assumptions fully holds ground. thirdly, taking account of the difference between chinese stock traders as a whole and that of developed countries, the author gives a thorough analysis on the complexity and volatility of its ( traders " ) reaction to information and points out that the intrinsic heterogeneous and volatile reaction to information is an important reason for the almost unpredictability of the price or return rate in china ' s stock exchange

    本文首先採用arma模型、非參數模型以及神經網路模型對我國股市時間序列進行研究，對三種方法在分析我國股市時間序列的表現進行評價，並得出了一些對監管部門以及股票交易者有借鑒意義的結論；其次作者對三種模型分析我國股市時間序列的前提進行了討論，特別是利用garch模型對我國股市的系統穩定性進行了量化檢驗，得出了前提難以滿足導致準確預測我國股市價格或收益率困難的結論；第三，考慮到中國股市股票交易者群體與發達國家股市股票交易者群體之間的差異，作者借用行為金融學的理論成果對我國股票交易者對信息反應的復雜性和易變性進行了詳細分析，指出股票交易者對信息反應的異質性和易變性是造成難以準確預測我國股市的一個重要原因，考慮到我國股市以散戶為主導的特性將長期存在，因此將行為金融學的研究結論納入對我國股市時間序列的量化研究具有重要的意義；最後，作者從唯理預測與唯象預測之間差異的角度出發，指出了唯象預測的缺點並對我國股市時間序列的研究方向進行了展望。
  20. To meet the practical requirements for distributed - memory parallel computing of numerical forecasting models, we study on the parallel characteristics of spectral element and finite difference methods. on this basis, we develop fast and parallel computations for three meteorologic models, including 2 - d shallow water equations, the new generation multi - scale weather forecasting model and the ocean general circulation model

    本文從氣象預報數值模式分散式存儲并行計算的實際需要出發，著眼于譜元素方法和有限差分的并行計算性能，研究了二維半隱譜元素淺水波模式、中國科學院大氣物理研究所第三代海洋環流模式和中國新一代多尺度預報模式等三個氣象預報模式的高效并行計算，設計實現了相應的應用軟體。
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