時間離散化 的英文怎麼說

中文拼音 [shíjiānlísǎnhuà]
時間離散化 英文
time discretization
  • 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
  • 間 : 間Ⅰ名詞1 （中間） between; among 2 （一定的空間或時間里） with a definite time or space 3 （一間...
  • 離 : Ⅰ動詞1 （離開） leave; part from; be away from; separate 2 （背離） go against 3 （缺少） dispens...
  • 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
  • 時間 : time; hour; 北京時間十九點整19 hours beijing time; 上課時間school hours; 時間與空間 time and spac...
  • 離散 : dispersed; scattered about; separated from one another; spread; debunching; straggling; fringing;...
  1. Comparing numerical character of above two models, it shows that the variance of atmosphere motion must be modified so the time step used in numeric simulation has no effect on numerical character of chaff clouds

    對數值模擬模型的分析表明必須對大氣的運動方差進行時間離散化補償，進行離散化補償后箔條雲團的數字特徵不受模擬時時間步長的影響。
  2. Fist ly, use mass equivalent method to predigest the original rotor system. secondly, use transfer matrix arithmetic to have finished the relative program to calculate the critical speed of flexible multi - tray rotor bearing system by matlab language. thirdly. finish program the unbalance response using riccati - transfer matrix arithmetic and finity buck arithmetic. fourthly, answer to the high vibration of uncontroled system when cross the critical speed, come out to adopt changing clearance damper bearing to control the viberation

    本文對多柔盤轉子-支承系統的振動現象做了以下初步探索：用質量離散化方法把原轉子系統簡化；採用matlab語言編制了對傳遞矩陣法計算多柔盤轉子-支承系統的臨界轉速；用matlab語言對riccati傳遞矩陣法和有限元法編制了程序計算系統的不平衡響應；並針對其過臨界轉速時振動較大的現象，提出採用變間隙控制油膜剛度和阻尼，從而使原系統的在特定轉速（臨界轉速）的一段范圍內不平衡響應減小；並從被動控制與主動控制兩方面進行數值模擬，取的了較好的控制效果。
  3. By use of - perturbation method with spatial discretization, the hydraulic transient system controlled by quasilinear partial differential equation was converted to a time - continuous linear system, so that the inverse problem of hydraulic transients under limited pressure could be sol ed with the optimal control theory for time - continuous systems

    採用-攝動法並經過空間離散，將由擬線性偏微分方程式控制制的有壓瞬變流系統轉化為時間連續線性系統，從而使有壓瞬變流限壓控制反問題能應用時間連續系統最優控制理論來求解。
  4. We study the time evolution law of the atomic response in an open - type inversionless lasing system when the probe or driving field is off - resonance, and compare the law with that obtained when the probe and driving fields are resonant. we find that the detuning has considerable effects on the time evolution law : when the probe or driving fields is off - resonance, the dispersive responses for the probe and driving fields are no longer 0 and the two - photon coherence is no longer a pure real ; the variation of the probe detuning can make the time evolution law of the population distributions and the gain ( absorbtion ) of the driving field changing obviously ; with detuning increasing, the time evolution behavior of the gain ( absorbtion ), dispersion of the probe field and the two - photon coherence will gradually diviate from the evolution law of the standard damped oscillator ; with the driving detuning increasing, the oscillating time of the dispersion of the driving field becomes longer, the amplitude and the stationary value increase

    研究了探測場或驅動場失諧情況下開放的型無粒子數反轉激光系統中原子響應的時間演化規律，並與探測場和驅動場都共振時的演化規律進行了比較.我們發現失諧對時間演化規律有顯著的影響;當驅動場或探測場失諧時，原子對探測場和驅動場色散的響應不再為零，雙光子相干不再是純實量;探測場失諧的變化將使粒子布居和驅動場增益（吸收）的時間演化規律明顯改變;隨著失諧的增大，探測場增益（吸收） 、色散和雙光子相干隨時間的演化行為逐漸偏離標準阻尼振子的演化規律;驅動場色散驅動場失諧量的增加而振蕩時間變長，振幅和穩定值變大
  5. Abstract : the attitude error performance of electrostatic gyro should be understood and the relevant error equations must be set up in order to ensure the navigation precision of esgm. the relation between the navigation errors and the attitude errors of gyro was derived by use of spherical triangle. the simulation results show that the temporal performances of the longitudinal and distance errors which come from the initial alignment errors are periodically variational. they also show that the longitudinal and distance errors resulted from gyro drifts are not convergent in time. thus, the effects of initial alignment errors and gyro drifts can not be neglected and must be estimated and compensated

    文摘:為了保證靜電監控器的導航定位精度，需要了解靜電陀螺的姿態誤差特性，建立相應的誤差方程.本文採用球面三角形原理推導了導航定位誤差與陀螺姿態誤差的關系式.模擬結果表明，由初始定向誤差引起的經度誤差和距離誤差的時間特性是周期變化的；由陀螺漂移引起的經度誤差和距離誤差是隨時間發散的.因此，初始定向誤差和陀螺漂移的影響不能忽略，必須對其進行估計和補償
  6. There is difference frequency measurement requirement for every part of pid regulating, difference between dynamic quality and static quality in response time and accuracy. according to these, it use the interrupt functions and high - speed counter of the simens s7 - 200 plc cpu226 basic unit and some peripheral circuit to measure frequency ; in software designed, the procedure frame of hydraulic - turbine governor and disperse process of parallel pid are analyzed, an improved pid algorithm is adopted to realize a pid regulation mode with variable structure and parameters ; the mechanical liquid - pressure system of the hydraulic - turbine governor is with electric - hydraulic converter unit of step motor. according to the drive character of five phase of response step motor, a variable frequency regulated voltage driver unit is designed in order to realize interface between plc and driver of step motor

    本文利用s7 - 200plc自身的特點設計了頻率測量單元，根據pid調節各個環節的特點，以及調速器動態特性、靜態特性對頻率測量的實時性和精度要求的不同，利用s7 - 200plc基本單元中內置的高速計數器以及相應的外圍放大整形、分頻電路，實現了水輪發電機組頻率的測量；在軟體上，對微機調速器的整個程序框架、並聯pid的離散化過程進行了分析，選用改進的pid演算法實現了變參數、變結構的pid調節模式；調速器的機械液壓隨動系統具有步進電機電液轉換元件，採用五相反應式步進電機，根據其驅動特性設計了變頻調壓驅動器，實現plc與步進電機驅動器之間數字介面。
  7. ( 4 ) a nonlinear model including the loss of cross - sectional area of corroded rebar, the reduction of mechanical properties of corroded steel and the degradation of the bond strength between concrete and corroded rebar was presented

    氯離子擴散系數是一個隨時間、擴散深度和氯離子濃度變化的變量。 （ 4 ）建立了考慮銹蝕鋼筋截面面積減小、力學性能下降以及混凝土與鋼筋之間粘結性能退化的非線性模型。
  8. Water cement ratio and mixing fly ash or slag into concrete effect on ability of resisting chloride penetrating that are considered in the model. the effect of environment that include temperature, relative humidity and cumulating of surface chloride concentration of concrete are also considered. moreover, chloride diffusion changing with time is included in this model as well as

    模型中考慮水灰比和混凝土配合比（摻入不同量的粉煤灰和礦渣）變化對混凝土抵抗氯離子侵蝕能力的影響，同時考慮溫度、相對濕度和表面氯離子濃度累積變化等環境因素對氯離子侵入混凝土過程的影響，以及氯離子擴散系數隨時間的變化。
  9. Hence analysis and design of nonlinear sampled - data systems has been, in recent years, a subject of growing interest in the international community of control research. when a continuous - time plant is controlled using a digitally implemented controller, it is often faced that a continuous - time plant is transformed into its equivalent discrete - time model. a digital controller is usually designed on the base of approximate discrete - time models of the continuous - time nonlinear systems because it is difficult to obtain the closed form of the exact discrete - time model for nonlinear control systems

    利用計算機等一類離散控制裝置來控制連續時間的受控對象時，都會遇到把連續時間系統化為等價的離散時間系統的問題，通過采樣器和保持器來實現離散時間的采樣控制，對于非線性連續受控系統，由於連續系統的時間離散化后一般得不到其等價的精確離散化模型表示的有限形式，實際上由其近似離散化模型代替來設計控制器，而近似會引起信號失真，那麼基於近似離散化模型上設計的采樣控制器，它是否同樣對原連續受控系統有效
  10. On the base of analysis of hydrologic geology from aquifer distribution, boundary conditions and dynamic characters etc. in the research area, the paper sums up the hydrologic geologic condition, builds up the conceptual model of groundwater resource evaluation and presents 2d calculation model, as well as numeric solution and computing flow chart. after introducing general solutions of mathematic models and implementation method of rectangular grid, the paper realizes the automatic technique of spatial dispersion rectangular grid of evaluation models based on gis. finally, the paper fulfills the integration of gis with groundwater resource evaluation models from gis - based basic management information, spatio - temporal dispersion of models, definition of subprogram and visual evaluation of parameters, as well as models simulation etc., and visualizes the results of evaluation models

    論文以地下水超采?地下水降落漏斗?地面沉降現象較為嚴重的常州、武進地區作為研究評價區域，在對評價區域的含水層分佈、邊界條件和動態特徵等水文地質條件分析的基礎上，概化了其水文地質條件，構建了相應的地下水資源評價概念模型與數學模型，並給出其數值解法和相應的計算流程；論文在介紹數學模型的兩種常用數值解法和模型空間離散的矩形網格生成技術的基礎上，實現了基於gis的評價模型空間離散矩形網格的自動生成；最後，論文從基於gis的評價模型基本信息管理、模型空間時間離散方法、子程序包與模型計算參數可視化賦值、模型的擬合等方面實現了gis與評價區域的地下水資源評價模型的集成，並將模型評價結果可視化。
  11. We used the icr and kunming mice and got the embryos of 3. 5dpc by means of superovulation, then cultured the embryos on the feeder layer derived from icr or kunming mice, dispersed the inner cell masses ( icms ) or es cell colony in the appropriate time. in this period, we analized the effects of feeder layer, trypsin and embryos isolated from uteri of different varietal mice on the es cell lines

    以icr小鼠和昆明小鼠為實驗對象，採用超數排卵的方法獲得小鼠胚胎，培養在用絲裂黴素c處理過的icr小鼠和昆明小鼠mef細胞飼養層上，選取適當時間離散增殖的icm和類es細胞集落，分析了在小鼠es細胞建系過程中，飼養層細胞、消化液及不同品系來源的胚胎的影響。
  12. ( 3 ) we bring bdf method of order two forward as time discrete method for the two - dimension three - temperature heat conduction equations

    （ 3 ）提出使用二階bdf方法作為二維三溫熱傳導方程的時間離散化方法。
  13. Because of continuity of load effects in time and space, displacement effects of previous time period in the latter time period and effects in various places have been taken into accounts. it is on these basis that the paper puts forward the dispersed counting way discrete algorithm based on such relationship, takes time - stepping integration to calculate rails " dynamic response, uses fortran language to write counting program, and conducts computer mock tests about rails " power response

    由於荷載作用在時間和空間上的連續性，因此考慮了前一時間段所產生的位移對后一時間段的影響以及不同位置的相互影響，在此基礎上提出了基於車輪、軌道、枕木相互關系的離散化演算法，採用時間步長積分計算了軌道的動力響應，使用fortran語言編制計算程序對軌道動力響應進行了模擬。
  14. In general, ca are idealization of physical systems in which both space and time are assumed to be discrete and each of the interacting units can have only a finite number of discrete states

    在元胞自動機模型中，空間、時間都被離散化，每一個相互作用的單元僅為有限的狀態。
  15. In this paper, we address the single machine scheduling problem with discretely controllable processing times, our objective is to minimize the makespan plus the total processing cost

    摘要考慮工件加工時間離散可控的單機分批排序問題，目標函數是極小化最大完工時間與加工費用之和。
  16. Then the mathematical problem of nonlinear heat diffusion with temperature dependent thermal conductivity has been derived during laser irradiation of two - layer structures. to solve this problem, a kirchhoff transformation and further time variable transformation has been used

    於是，文中還用有限容積法將溫度場定解問題離散化，選擇合適的空間網格和時間網格，通過matlab編程實現對四維溫度場的數值模擬。
  17. The moving loads and reaction caused by rail are discrete by stepwise constant functions in time domain. the calculation of load effects is simply, but the calculation of the effect of react force is complicated. the calculation of the vibration caused by react force is discussed in detail, and compared with continuous model

    在時間域內，將移動荷載和其引起的軌道的響應利用階躍函數進行離散化，簡化了荷載作用的計算，但是由於反力的計算十分復雜，所以本文對由反力引起的振動的計算進行了詳細的分析，並與連續性模型進行了對比。
  18. At first, buck - boost circuit is detailed analyzed and derived strictly in the theory, and on the base, the current of the inductance and the output voltage are analyzed elaborately. when the input voltage is the ac voltage with the nomal frequency, the two variable quantity are analyzed and some conclusions are concluded by means of equal length separation methods and introducing function methods and derivative - equation methods. and this is the basis of the next proceeding

    首先，對buck - boost電路進行了嚴謹地理論推導，先對buck - boost電路在輸入為直流電壓時的工作情況進行了分析；在此基礎上，對輸入為工頻交流電壓時的電感電流、輸出電壓作了詳細分析，利用等間距離散化方法、引入函數法、微分方程法分別對變量進行了推導和總結，為下一步工作奠定了理論基礎。
  19. ( 2 ) damage detection based on wavelet transformation using the principle of time - frequency analysis based on orthonormal discrete wavelet transformation, it can detect damage by analyzing how the frequency content of observation signal changes with time

    該方法利用基於離散正交小波變換的信號時頻分析原理，通過分析觀測信號的頻譜隨著時間的變化情況來檢測破損。
  20. For visualization geometrical data generated in numerical simulations, two subdivision methods are used and described in full detail. the two methods, which are triangular subdivision and quadrilateral subdivision, are incorporated into the visualization system with vtk for surface and volume rendering. the system supports a wide variety of visualization algorithms including scalar, vector, tensor, texture, and volumetric methods ; and advanced modeling techniques such as implicit modeling, polygon reduction, mesh smoothing, cutting, and contouring

    針對數值計算時被計算的幾何外形，即三維空間離散的數據所確定的幾何外形需要顯示出來特性，本文詳細介紹了兩種常用的剖分技術，即三角形剖分和四邊形剖分原理、方法；將現有的、特定的可視化演算法和技術與vtk類庫充分結合，設計了能讀取、存貯三角形或四邊形剖分的數據組織以及實現其幾何體繪制的類庫。
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