振蕩指數 的英文怎麼說

中文拼音 [zhèndàngzhǐshǔ]
振蕩指數 英文
index of oscillation
  • 振 : 動詞1. （搖動; 揮動） shake; flap; wield 2. （奮起） brace up; rise with force and spirit
  • 蕩 : Ⅰ動詞1 （搖動; 擺動） swing; sway; wave 2 （無事走來走去; 閑逛） loaf; wander; roam; loiter; go a...
  • 指 : 指構詞成分。
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 指數 : 1. [經] （比數） index number; index 2. [數學] exponent
  1. During flood years, the center of negative anomaly is around ural mountains, the center of positive anomaly is around high - latitude of east asia and another negative and positive center are over okhotsk sea and the north - west pacific, respectively

    通過對夏季旱澇等級指數的morlet型和mexicanhat型小波變換分析，發現山東夏季旱澇指數主要存在著2 5年和7年左右的周期振蕩。
  2. The designs of the pfd, digital filter ocxo and fractional - n counter in the frequency synthesizer unit are discussed, based on the pll theory. in order to improve the precision of pll, some design methods of pfd are given, and its feasibility is validated by the fpga hardware implement

    2 .在鎖相理論指導下，第三章討論了頻率合成器設計中的鑒頻鑒相器、數字濾波器、恆溫壓控振蕩器和分頻電路設計。為了進一步提高頻率合成的精度，文中給出了提高鑒頻鑒相器性能的一些設計思想，結合fpga的硬體設計驗證了其可行性。
  3. ( 2 ) in the condition of quasi - quadrennial or quasi - biennial oscillation, monthly mean anomaly fields of slp, ssta, x and f have the most important effect on the linear response of nino3. 4, and there exists obvious spatial symmetry among cold and warm events of enso oscillation

    （ 2 ）在準4a或準2a振蕩下， slp 、 ssta 、 _ x 、和_ y的月平均距平場對于nino3 . 4指數的線性響應佔主導地位， enso振蕩的冷暖事件間具有明顯的空間的對稱性。
  4. The limitations of such methods based on forced oscillation tests are also pointed out

    文中還指出了類似的基於受迫振蕩圓柱體實驗數據的預報模型存在的缺陷。
  5. According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

    本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。
  6. So if missed open quotation strong, should discover in time cast off exponential oscillation and can with be being mixed firmly the kind of to the limit of one ' s capacity runs share price upper part of yu jun price, be in as far as possible all stock with goods is more reliable near valence

    所以假如錯過了開盤強勢的個股，要及時發現擺脫指數振蕩而能以穩和放量的方式將股價運行於均價上方的個股，盡量在均價四周進貨比較穩妥。
  7. To avoid high frequency oscillation in the course of autopilot design, damping coefficient value was treated as a constraint, the rise time was taken as objective, and the other performance criteria were taken as constraints, then the robustness design problem was solved by multi - objective optimization method

    摘要在導彈控制系統設計過程中，考慮了自動駕駛儀的高頻振蕩問題，將其轉化為系統的一個約束條件，同時把上升時間轉化為目標函數，其他設計指標視為約束條件，採用有約束多目標優化的方法解決了系統魯棒性設計問題。
  8. In this text we make a diagnosis of linear and nonlinear response of quasi - quadrennial ( qq ) and quasi - biennial ( qb ) component of nino3. 4 index by using reanalyzed ncep / ncar data of sst, wind stress ( pseudo stress ) field, ssp, then have a time and spatial analysis of wind stress field by using mssa, and finally find the importance and contrast the effect of different wind stress field forcing the sea so as to find the cause ofenso irregularity

    本文首先分析海表溫度（ sst ） 、風應力場、海表面氣壓（ slp ）等ncep ncar再分析的月距平場對于nino3 . 4指數的準4a （ qq ）和準2a （ qb ）振蕩成分的線性和非線性響應，接著用mssa （多通道奇異譜分析）對風應力場進行時空特徵分析，最後用一個熱帶太平洋動力海洋模式研究具有不同振蕩性質的風應力場對海洋強迫作用的重要性及差異，尋找enso不規則性的原因。
  9. All these changes, which are of importance to subsynchronous oscillation analysis, cannot be described with the quasi steady state ( qss ) model any more. therefore, the deficiency of qss - model - based eigenvalue method is pointed out and a novel method named complex torque coefficient - test signal method is adopted to analyze the subsynchronous oscillation caused by hvdc or facts devices

    基於此，指出了採用準穩態模型進行hvdc系統次同步振蕩分析的局限性，並引入了分析hvdc或含有facts裝置的系統次同步振蕩問題的方法：復轉矩系數- - - -測試信號法。
  10. For the amplitude - frequency response at the self - oscillation frequency is one, a method to calculate the dynamic accuracy and the index of the servo system is provided, by comparing them, the scheme to design the verifying unit is presented

    利用伺服系統在自振蕩頻率點的幅頻特性為1這一特點，將輸入信號頻率、幅值、系統的自振蕩狀態和系統的參數聯系起來，構建了伺服系統動態精度的計算公式和指標估算經驗公式，並根據兩者的關系提出動態精度校正方案。
  11. If we apply the same input to an unstable system, the output will never settle down to a steady - state phase ; it will increase in an unbounded manner, usually exponentially or with oscillation of increasing amplitude

    如果我們將同樣的輸入作用於不穩定的系統，其輸出將不會回到穩態，而是以無界的方式增長，通常其幅值是指數增長或者振蕩增長。
  12. In this dissertation, the method to design and realize the digital receiver in the field programmable gate array ( fpga ) has been discussed ; combining coordinate rotation digital compute ( cordic ) to design nco, we get a efficient structure without multiplications

    本論文正是運用現場可編成邏輯器件（ fpga ）設計與實現數字接收機問題開展研究，結合坐標旋轉數值計算（ cordic ）演算法實現數控振蕩器（ nco ） ，得到一種免乘法器高效可移植性好的數字接收機fpga實現結構，並在現有的硬體平臺上進行了接收機系統的調試，測試結果表明該接收機能夠達到系統指標要求。
  13. In addition the h. kantz method is applied to analyze the time series of the motor current, the maximal lyapunov exponent calculation is realized, the criterion for the motor chaos is brought forward, the existence of chaotic phenomenon in the induction motor is verified by the characteristic exponents, which proves theoretically that the chaotic movement is one of the reasons that results in the low frequency oscillation of the induction motor system

    應用h . kantz方法對電機電流信號的時間序列分析，實現了最大李亞普諾夫指數的具體演算法，提出了電機出現混沌運動的判定根據，通過特徵指數驗證了異步電動機現象的存在，從理論上說明混沌運動是異步電動機系統產生低頻振蕩的原因之一。第三部分深入研究了系統低頻振蕩的主要影響因素。
  14. It can been predicted by morlet wavelet transform that the 10 years after 2000 would appear an increasing rainfall trend in summer in northwest china. ( 5 ) the drought and flood have obviously interannual oscillatory variabilities. the climate is moist from 1980 ' s to early 1990 ' s. it ' s the extremely dry period in the 40 years when the rainfall is plentiful while drought happened now and then after 1995

    （ 5 ）西北地區夏季旱澇異常區區域旱澇指數的時間演變特徵表明：青藏高原東北側和渭水流域的夏季旱澇以20a與8a的年代際變化為主，北疆主要存在8 9a的周期振蕩，河西走廊即有15a周期振蕩，又有8 10a的周期振蕩。
  15. Furthermore, aqm also need to avoid sending congestion notification to too many sources and consequently decreasing the utilization of bottleneck link. therefore the sending rate of congestion notification should relate to the traffic load but red does n ' t take this factor into consideration thereby resulting in queu e size oscillate which arose queuing delay and jitter

    具體說來， red演算法中擁塞指示的發送速率主要是由參數max _ p來體現的，並且max _ p值是靜態設置的，所以當流量負荷發生改變時red演算法難以適應這種變化，從而會引起隊列振蕩，導致不必要的傳輸延遲和抖動現象。
  16. These conditions can be used both to design globally exponentially stable and periodical oscillatory neural networks with time - varying delays, and to enlarge the area of designing neural networks. our work has important significance in related theory and it ' s application

    這些條件可用於設計全局指數穩定的和周期振蕩的具可變時滯的神經網路，大大擴展了神經網路設計的范圍，這在理論上和應用中都有著重要意義。
  17. In this chapter, the suitable devices and circuit structure have been choosed to design a second order multiplier, a fifth order multiplier, a sixth order harmonics mixer and a dro operating in 9. 4ghz. the forth chapter is a section of system realization and test, in this chapter, the system of low phase noise frequency source has been constructed and tested. the results show that the targets of the system have been achieved

    第三章的系統分器件與實驗數據部分，主要是以上述第二章的分析為基礎，以所推導的理論公式為指導選取必要的器件和合適的電路拓撲結構，分別設計實現了一個二次倍頻器，五次倍頻器， 6次諧波混頻器和一個9 . 4ghz的介質振蕩器，為後述整個系統的實現在硬體上做了必要的準備。
  18. By means of analysis and classification of historical time series data of shanghai composite index, this paper creates yield distributions that belong respectively to rising market, dropping market and non - trend market

    對上證綜指的歷史時間序列數據進行分析分類，建立分屬上漲市場、下跌市場、振蕩市場的收益率分佈。
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