時間流變換 的英文怎麼說

中文拼音 [shíjiānliúbiànhuàn]
時間流變換 英文
time stream transformation
  • : 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...
  • : Ⅰ動1 (液體移動; 流動) flow 2 (移動不定) drift; move; wander 3 (流傳; 傳播) spread 4 (向壞...
  • : 動詞1. (給人東西同時從他那裡取得別的東西) exchange; barter; trade 2. (變換; 更換) change 3. (兌換) exchange; cash
  • 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...
  1. [ scene change to conan, time passed ] jodie protects camel ' s safety

    [場景柯南,逝過去]朱蒂保障卡梅爾的安全
  2. Firstly, in spherical coordinate system, the sovp formulation for the time - harmonic electromagnetic fields of the current dipole in conductive infinite - space is derived, using reciprocity theorem and transforming relations between special functions. then, selecting appropriate coordinate system, using superposition principle, the boundary - value problem of modified magnetic vector potential on the problem of a time - harmonic current dipole in spherical conductor is solved and analytical solution is obtained. finally, by means of the addition formulas of legendre polynomial and spherical harmonics function of degree n and order 1, the analytical solution in spherical coordinate system specially located is transformed into that in spherical coordinate system arbitrarily located

    首先利用特殊函數的轉化關系和互易定理推導得到了無限大導體空中球坐標下諧電元電磁場的二階矢量位形式:然後利用疊加原理,選擇合適坐標系,求解了導體球中諧電元的修正磁矢量位邊值問題,得到了問題的解析解;最後依據不同坐標系下電磁場解的轉化原理,藉助勒讓德多項式和n次1階球諧函數的加法公式,將坐標系特殊安放的電磁場解析解到坐標系一般安放的解析解,給出了球內電場和球外磁場的並矢格林函數。
  3. A transfer model is established, which can be used to study the interaction between the land surface physical processes of inhomogeneous region and the structure of atmosphere boundary - layer over urban and rural terrains. the model has simulated surface heat flux, surface temperature, temperature profiles, height of mixture layer and so on. and the differences between urban area, suburban area and rural area have been compared. this model mainly depends on the parameters below : surface albedo, surface roughness coefficient, moisture available coefficient of soil, thermal capacity and thermal diffusion coefficient of errain, cloudage. the result shows that this model can simulate the structure and eigenvalues of atmosphere boundary layer and their changes in a day. parameters used in this model aim at beijing city, and the time is at the beginning of september. to other cities, or other time, the parameters should be adjusted accordingly. in addition, being adjusted, the model can also be used for other homogeneous and inhomogeneous terrains

    模式主要依賴于以下參數和物理量:地面反照率下墊面粗糙度土壤的可含水量下墊面的熱容量和熱擴散系數雲量等參數。結果表明,本模式能合理地模擬不同地表熱量平衡地表氣溫混合層高度湍系數湍動能位溫廓線等,以及它們的日化。該模式所取參數主要針對北京市,為九月初,對于其他城市,參數應作相應的調整。
  4. After completing the mctf using db2 wavelet, it is well integrated with discrete wavelet transform ( dwt ) and embedded zero tree wavelet. it uses atom structure to organize the coded bit - stream to achieve the brilliant combination of three scalabilities : temporal, spatial and psnr scalabilities. and the software platform is based on vc + + 6. 0

    在基於db2小波的運動補償域濾波方法實現之後,本文將之和離散小波( dwt ) 、嵌入式零樹編碼進行有機結合,並採用基於基本原子粒的數據組織結構將分層后的數據有效地組織起來,實現了具有、空、質量三方面的完整可伸縮性的編解碼系統,系統的軟體平臺基於vc + + 6 . 0實現。
  5. In the digital inverter, we adopt the technology of digital dynamic waveform correction, which can compensate the delay between control signal and output waveform, and ensure the accuracy of control. at the same time, the technology of digital dc component adjustment was introduced, by which we can exactly compensate the control signal, and realize adjusting dc component of output on the premise of output performance

    在基於dsp的數字器平臺中,採用全數字波形校正技術,完全補償了控制信號延、功率管開關延以及死區對輸出spwm波形所產生的畸,充分保障了器控制的準確性;採用數字直分量調節技術,可以精確地對控制信號進行補償,在充分保證輸出性能的前提下,實現了輸出直分量的調節。
  6. High - frequency link power converters are receiving increasing attention. when the input frequency of ac - ac converter is quite high, such as 20khz or above, in order to make sure the converter switching action is restricted to the zero crossing point of the link voltage, the switching cycle becomes discrete pulse spectrums, however, the conventional pwm converters are ruled out because they would fail either to the efficiency or the low - distortion criteria

    當交-交頻器的輸入頻率非常高,通常為20khz,為了在零電壓條件下實現逆器開關管的通斷,器的開關刻必須選擇在高頻交電壓脈沖為零,這意味著器開關刻在軸上成為不連續的點,而常規的硬開關pwm器是將開關刻選擇在任意刻。
  7. Thirdly, it simulated the pumping circuit & dividing circuit with the widely used software matlab / simulink. the displacement of the rod piston and the impact of hydraulic are analyzed in the different input flow ( frequency of pump ) and different reversing time. it found out the cause of hydraulic impact ( one - to - one incorrespondence between the response time of dividing circuit and the operation time of rod piston ), and gave some methods to weaken hydraulic impact. in the final part of the paper, the reliability of the theory analysis is further verified by the experiment of hydraulic system

    首先在學原理的基礎上,深入分析混凝土在輸送管道內的動狀態,得出混凝土泵的負載特性方程;然後根據功率鍵合圖的建模方法,建立泵送迴路和分配迴路的數學模型,並運用模擬軟體matlab simulink對泵送和分配迴路模型進行了模擬,分析了在不同的輸入量(泵送頻率)和下,活塞桿的位移和系統的液壓沖擊情況,找到了引起液壓沖擊的根本原因(即分配迴路的響應(固定值)與活塞桿的運動化值)不相匹配) ,並提出了相應的改進方法。
  8. There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not

    首先引入開關函數概念,建立了正弦脈寬調制( spwm )逆器供電異步電動機,考慮主磁路飽和頻調速系統整體數學模型,模擬系統的低頻振蕩;其次從逆器-異步電動機系統能量轉角度出發,提出通過檢測逆器輸入電中負電是否大於1 / f _ c ( f _ c為逆器載波頻率)來判定系統是否出現低頻振蕩;最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。
  9. According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system

    針對研製任務的要求,課題期研製了下位機系統硬體和軟體,開發了上位機監控軟體,其中所作的具體工作包括:測量原理的研究和在系統中的實現,在本次設計中用三種方法來進行水位測量,分別是旋轉編碼器法、液位壓力傳感器法和可電阻器法;主控晶元的選擇,我們選用了高集成度的混合信號系統級晶元c8051f021 ;實現了信號的採集和處理,包括信號的轉和在單片機內的運算;高集成度16位模數轉晶元ad7705在系統中的應用,我們完成了它與單片機的介面設計及程序編制任務;精確鐘晶元ds1302在系統中的應用,在此,我們實現了用單片機的i o口與ds1302的連接和在軟體中對序的模擬,該晶元的應用給整臺儀器提供了基準,方便了儀器的使用;另外,針對研製任務的要求,還給系統加上了一路4 20ma模擬信號電環的輸出電路來提供系統監測,該部分的實現是通過採用ad421晶元來完成的,本設計中完成了ad421與單片機的spi介面任務,協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系,並完成了程序設計;與上位機的通信介面設計,該部分通過兩種方法實現: rs232通信方式和rs485通信方式;系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。
  10. Cool wall wizard dreaming to automatically download various colors wallpaper to work intensely all day into your computer, no longer feel monotonous and boring ; extremely rich in the network wallpaper, the 12 classification, support manually download new wallpaper ; intelligent frame rapid trimming technology, adaptive various popular display size ; timing can be manually or replacement of desktop wallpaper, different timing of the transformation also supports random transform mode ; circle player in the process, support the insertion of local wallpaper, wallpaper and local networks of pictures that turn ; to hide / show desktop icons, wallpaper and user - friendly viewing ; since the launch set to boot, the first time you gave surprise ; cool wall wizard provide three kinds of styles console skin ( white fashion, classic black, gray and elegant ) ; wallpaper borders can set the color to the background transparent desktop text

    雪狐酷壁精靈自動下載各類絢麗的壁紙,讓整天對著電腦埋頭工作的你,不再感到單調、無聊;極豐富的網路壁紙庫,十二大分類,支持手動下載新壁紙;智能邊框快速切邊技術,能自適應各種行的顯示器尺寸;可以定或手動更桌面壁紙,提供不同的選擇,還支持隨機模式;循環播放過程中,支持插入本地壁紙,實現網路壁紙和本地圖片的交替顯示;可隱藏/顯示桌面圖標,方便用戶觀賞壁紙;允許設定開機自啟動,第一就給你驚喜;酷壁精靈提供有3種風格的控制臺皮膚(白色尚、黑色經典、灰色典雅) ;還能設置壁紙邊框的顏色,讓桌面文字的背景透明。
  11. Wavelet transform of velocity - time data for the analysis of turbulent structures in a trayed bubble column

    數據的小波研究篩板式鼓泡塔中的湍結構
  12. The algorithm is also applied in the broken rotor bars detection in squirrel cage induction machines, which is dependent on detecting the twice slip frequency modulation due to the speed or torque in the stator current, and the rotor bar faults can be detected effectively without some preprocessing

    指出可以利用信號的小波脊線來提取頻率隨連續的信號的瞬頻率,並將該瞬頻率提取演算法成功地應用到異步電動機定子起動電信號的分析中,有效地提取出了轉子斷條故障特徵。
  13. Abstract : in the internal circulating fluidized bed, there exist the moving zone, fluidizing zone and heat transferring zone with different fluidized air velocities. the convection heat transfer coefficient of immersed tube in the heat transferring zone is impacted by the velocity of the moving zone nearby and its data and change trend are obviously different with those of the common bubbling bed. the maximum heat transfer coefficient is evidently higher than that of the bubbling bed. as the bed materials have not been fluidized in the heat transfer zone, the coefficient has increased highly. the curve of that changes gently, feasilble to control the combustion intensity in the fluidizing zone

    文摘:垃圾焚燒系統中,內旋化床存在不同布風速度的移動區、動區和熱區,處于熱區的埋管的對熱系數受附近動區氣參數的影響,其化趨勢及數值大小與普通鼓泡型化床之有明顯不同:最大的對熱系數明顯高於鼓泡床;熱區尚未,對熱系數已經大幅提高;整條熱曲線的化比較平緩,易於化床濃相床內熱。
  14. To reduce the inductor and the phase displacement between the input current and the input voltage simultaneously, multi - level ( ml ) converters are adopted as the pfc topologies in this thesis

    為了同減小電感和輸入電與輸入電壓的相位差,本文提出採用多電平器作為pfc器的拓撲。
  15. Based on the investigation with several voltage control methods, such as venturini method, instantaneous double - voltage synthesis method and space vector modulation method ( svm ), three new control strategies are put forward. firstly, a time - varying modulation coefficient svm method is proposed to improve mc ' s anti - disturbance performance under the asymmetry input voltage. secondly, a 5 - state switching strategy is presented for mc controlled by the svm method, which reduces the commutation number and switching losses remarkably

    在分析了venturini控製法、瞬雙電壓法、空矢量法等電壓控制方法的基礎上,提出了在非對稱輸入條件下矩陣器空矢量法的調制比改進控制策略,提高了器的抗干擾性能;對空矢量法的開關策略進行了研究,提出了新型5狀態開關策略,在保證其他性能不受影響的條件下,減少了器的次數和開關損耗;提出了一種矩陣器單電壓合成的新方法,它不僅使得器的控制簡單,計算量減少,而且使得開關損耗達到最少。
  16. The sms representation scheme allows a given specification to be decomposed into an ordered sequence of sub - sms, and attempts to match each sub - sms with one or more stored basic mechanical units. thus, the possible solutions are generated. the data structures, the decomposing and the synthesis algorithm are presented according to the established mathematical models and the data base system

    ,結合關系型數據庫系統對運動方案設計知識庫的組織管理(包括基本單元信息的存儲、提取操作及數據的復雜關系建立) ,提出了方案設計的綜合求解演算法,實現了在計算機上進行方案設計的可計算自動求解。
  17. And power loss analysis of srs and the layout design related to srs are very important to the proper design. with a small signal mathematic model of half - bridge converter, the relationship between performance of power supply and frequency domain characteristics of the system is analyzed. based on the above study and some simulation the system design is completed

    文中在給出了結合單繞組自驅動方案的對稱半橋器穩態原理分析、同步整管損耗分析暨選擇原則、同步整管相關電路的布局設計后,建立了對稱半橋器的小信號數學模型,分析了電源系統域性能指標與頻域特性之的聯系,在此基礎上完成了系統的設計。
  18. One is to use fourier transformation to convert the source signal from time domain to frequency domain and to discard high frequency harmonious components upwards of 19 ( gb / t14953 - 93 d5. 3 demanding ), then to have static huffman coding to the quantized char array which is composed of reserved direct current component and basic wave and each high frequency " s amplitudes and angles. the other is to use discrete wavelet transformation to convert the source signal from time domain to frequency domain and to set the high frequency coefficients that its absolute value is smaller than the given threshold to zero, then to have dynamic huffman coding to the quantized char array which is composed of multiple, wavelet ' s level, datum length, low frequency coefficients and reserved high frequency coefficients. mass simulinks and analyses under the two circumstances have done to show that data compression ratio is small and the relative error is also small and within the permission of engineering and the compression problem can be solved in theory of measured datum of power system

    第一種情況的壓縮方法為:採用傳統的傅立葉把原始信號從到頻率域,舍棄20次及其以上的高次諧波成分(保證了gb / t14953 ? 93d5 . 3要求) ,然後對保留的直分量、基波和各次諧波的幅值和相角數據量化后和量化分別乘以的倍數系數構成一個數組,以字元形式保存,採用靜態huffman編碼對數據進行壓縮;採用離散小波把原始信號從到頻率域,然後對分解得到的高頻系數進行閾值量化處理,對乘以的倍數系數、小波的階數、小波后的低頻、各級高頻以及原始數據長度、量化后的低頻系數以及保留的高頻系數大小、位置構成一個數組,以字元形式保存,採用動態huffman編碼對這個文件進行壓縮。
  19. Paths from start point to end point are founded, and the max - flow of boolean network is got by this way, which avoid conversion of graphics, and time complexity is lowered as well

    本論文利用標號法尋求起始點到終點的通路的方法,來求得布爾網路的最大,使得圖的減少,復雜度也隨之減少。
  20. 2. tow different types of power loading condition were applied on chips respectively. the transient thermal analysis was conducted to determine temperatures vary over time

    2 .以兩種不同功率加載方式進行自然對熱條件下的封裝瞬態熱分析,得出封裝體溫度隨化規律。
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