過零周期 的英文怎麼說

中文拼音 [guòlíngzhōuqī]
過零周期 英文
zero crossing period
  • 過 : 過Ⅰ動詞[口語] （超越） go beyond the limit; undue; excessiveⅡ名詞（姓氏） a surname
  • 零 : Ⅰ數詞1 （零數） zero2 （數的空位） zero sign （0）; nought 3 （表示沒有數量;無） nil; nought 4 （...
  • 周 : Ⅰ名詞1 （圈子; 周圍） circumference; periphery; circuit 2 （星期） week 3 [電學] （周波的簡稱） c...
  • 期 : 期名詞[書面語]1. （一周年） a full year; anniversary 2. （一整月） a full month
  1. The initial vsd process uses two main characters, the average instantaneous energy and the average instantaneous zero crossing rate ( zcr ). to make the first recognition for the start and the end, the emphasis of which is to select the appropriate value of the threshold and the length of frame. in the final vsd process, the author compares several characters and confirms the new recognition character

    初步分段過程使用了能量和過零率這兩個主要特徵進行端點檢測，重點是合理選擇兩個重要參數? ?門限和統計幀長度的取值；在最終分段過程中，筆者首先通過比較幾種特徵的識別效果，選擇卡爾曼濾波參數作為再次分段的識別特徵，還提出了一種新的識別特徵? ?周期性緩變特徵，使用這兩個特徵分別在子語音段內進行端點檢測。
  2. The mutual inductor of electric current and voltage mutual inductor play an important role in relay protection. prevent from ct differential to protect and miss movement an important subject that the generatrix is protected on the saturation, put forward two electric current pass zero hour linear to spread person who become put into differential to protect in ct in recent years, avoid ct saturation district, can judge the bus bar trouble correctly

    但是在母線區外發生短路故障（特別是故障電流含有大量非周期分量）時， ct會出現飽和現象， ct飽和后，不能正確地傳變一次側電流，從而使二次電流發生嚴重畸變，產生很大的差電流，這樣就容易引起誤動作。防止ct飽和時差動保護誤動作一直是母線保護的一個重要課題，近年來提出的在ct二次電流過零時的線性傳變區投入差動保護，避開ct飽和區，能對母線故障做出正確判斷。
  3. The price is likely to be reduced again by the weekend as retailers compete to have the best advertised price

    由於零售商期望通過競爭贏得最佳廣告價，本周末書價將有可能再次下降。
  4. As the salvage of perished products is almost zero, and the demand is uncertainty, retailers usually set the product ' s price dynamically to influence the demand

    由於需求的不確定性，短生命周期產品的零售商們常常通過動態定價的方式來影響需求，實現自身收益最大化。
  5. In the process of large - scale electromechanical equipment manufacturing, the degree of organization and management as well as measures of technique during the course of cutting stock, which do a great effect to produce cost and produce cycle

    大型機電設備的生產製造過程中，零件毛坯下料生產的組織管理水平和技術手段，對設備的製造成本和生產周期有很大的影響。
  6. As the main research institute of ring laser gyroscopes in china, teaching and research section 208, nudt, is always puzzled by the problem of null - shift in the process of developing mechanically dithered ring laser gyroscopes ( mdrlg ). the problem is that the mdrlg ' s null shift equal to the integral times of dither periods when the sample time is set as integer dither periods

    作為國內激光陀螺主要研製單位的國防科大208室，在機械抖動激光陀螺（機抖陀螺）研製過程中一直為零漂問題所困擾：實驗測得機抖陀螺零漂為抖動周期（采樣時間取整數個抖動周期）的整數倍。
  7. The aircraft ' s longitudinal motion short period poles and long period zeros in right plan e may make the aircraft control system be not got by only using qft. so pole and zero assignment by state feedback is needed to change this circumstances and then qft is used to get the control system. simulink results are given to prove at the system meets the requirements.

    飛機縱向運動方程的短周期和長周期的右半平面可能存在零極點對問題，這對飛機控製造成不利影響，直接利用定量反饋理論不能滿足要求。本次論文首先進行短周期狀態反饋極點配置，然後利用定量反饋來解決這個問題。通過模擬分析得到滿意的結果。
  8. Chapter two and chapter three analyze the requirements of different types of enterprises, including mass production, middle and small batch production, single production. based on this, the main function frame of master production scheduling and job shop scheduling is established. four methods of drawing master production scheduling and four modes of formulating job shop scheduling are proposed, and most of them are discussed in details at aspects such as theory, realization and data store, etc. not only is it important for master production scheduling and job shop scheduling to support different types of enterprises, but also for other support functions

    第二章通過對不同類型企業（包括大量生產、多品種中小批量生產、單件小批生產）的主生產計劃編制方式和功能的需求分析，提出了能夠適應多種生產類型企業需求的主生產計劃管理子系統的總體功能框架，重點研究了分別適應不同生產類型企業需求的固定周期計劃、滾動計劃、零部件預投計劃、投產計劃等四種主生產計劃編制方式，並實現了數據庫的設計。
  9. The ball mill load - control apparatus adopted the assembly language and the c51 language to program and its concerned software was designed, including the data collection, the wave - percolation, the short - time average over - zero ratio, the estimation of the power chart and the average - period chart

    磨機負荷控制儀軟體使用匯編和c51編程，本文進行了相關軟體的設計，包括數據採集、濾波、短時平均過零率、功率譜估計和平均周期圖等。
  10. It was demonstrated that this sort of load - control apparatus has superior performance. we used a electric transmitter as the transducer to collect the sound signal, using the daq toolbox of the matlab to achieve the collection of the sound signal, and using the dsp toolbox of the matlab and the sound - launch technology to analyze the time - domain characteristic and the frequency - domain characteristic of the signal, chiefly analyze its short - time average amplitude, its short - time over - zero ratio and its estimate of the power chart and the average - period chart

    實驗中使用了駐極體話筒作為球磨機聲音拾取傳感器，利用matlab中的數據採集（ daq ）工具箱實現對磨音的採集，利用matlab信號分析（ dsp ）工具箱和聲發射技術對磨音進行時域和頻域分析，主要分析磨音的短時平均幅度和能量、短時平均過零率、功率譜估計和平均周期圖。
  11. This thesis first compares the difference between the physical retailing and the e - retailing, and then discusses the advantages in e - retailing, which expand the content of service in e - retailing products through the innovation of product, the innovation of management technology and the innovation of contracting environments. as the procedure of e - retailing, the thesis considers the e - retailing as the life - cycle of a product. based on this, the thesis gives the basic conditions and fundamental environments supporting the e - retailing, which includes the improved infrastructure and internet network, the enough number of consumers, the upgrading of ' management technology, the convenient logistic conditions and the popularity of internet payment tools

    對網路零售的發展過程，本文理解為以社會經濟環境的變遷所決定的網路零售生命周期，依此為參照，通過與美國等發達國家網路零售環境的比較，探討網路零售進入成長期的臨界條件和環境，即社會經濟環境的發展和變遷帶來的交易成本的下降是網路零售得以實現的基礎，包括：基礎設施和通訊設施的完善、網路零售消費者群體的發展壯大、管理技術條件的進步和提升、良好的物流配送環境、網路支付手段和網路銀行的普及。
  12. By using phase shifting control between right bridge leg and left bridge leg, the output cy cloconverter commutating while the bi - polarity three - state high frequency ac volage from the input cycloconveter is zero, . and commutation overlap of the output cycloconverter and polarity selection of the input voltage, the leakage inductance energy and the output filtering inductance current are naturally commutated, and zvs switching of the output cycloconverter are realized, the surge voltage and surge current of the output cycloconverters are overcome

    通過輸入周波變換器右橋臂相對左橋臂的移相，讓輸出周波變換器功率開關在輸入周波變換器輸出的高頻交流電壓為零期間進行換流，並藉助輸出周波變換器換流重疊和輸入電壓極性選擇，從而實現了變壓器漏感能量和輸出濾波電感電流的自然換流、輸出周波變換器的zvs開關，解決了輸出周波變換器固有的電壓過沖和環流問題。
  13. Secondly, on the basis of the research on the characteristics of the wavelet coefficients, the combination of the ezw ( embedded zerotree wavelet ) and advanced rle ( run length encode ) is presented to realize the efficient codes of the wavelet coefficients. finally, the improved periodic extension algorithm is used to solve the boundary problem appeared in wavelet transform. the algorithm is realized by software and the good processing results are obtained

    論文選取cdf （ 2 ， 2 ）小波基，取得了較好圖像壓縮效果；二、通過對小波系數的特點的研究，提出了將嵌入式零樹編碼和改進的遊程編碼相結合的方法，實現了小波系數的有效編碼；三、採用改進的周期延拓法解決圖像進行小波分解時出現的邊界問題，並通過軟體實現，取得較好的處理效果。
  14. Ds signal is twice modulated with the rapid pseudorandom noise sequence and the carrier. so it appears cyclostationary. in the field of spectral correlation, ds signals appears its characteristic as fallows : for the amplitude of spectral correlation, the information of carrier frequency and pn code rate are contained on the spectrum frequency equal to zero sheet, and also the pn code rate is contained on the sheet of spectrum frequency equal to carrier frequency ; for the phase of spectral correlation, the information of carrier initial phase is contained on the sheet of cyclic frequency equal to double carrier frequency

    Ds信號是經過高速偽隨機序列和正弦載波二次調制的寬帶信號，因此具有周期平穩特性，它在譜相關域表現為:幅頻特性在譜頻率等於零截面切片上包含了載頻和偽碼速率信息特徵，在譜頻率等於載頻截面切片上包含了偽碼速率信息特徵;相頻特性在循環頻率等於兩倍載頻截面切片上包含了載波初相信息特徵。
  15. Assembly fixture is a large scale tooling for orientation and clamping in aircraft ' s assembly, and directly affects the period and quality of aircraft production

    型架是飛機裝配過程中，對零件、組件進行定位夾緊的一類大型的夾具，其設計製造周期和質量直接影響到飛機研製的周期和質量。
  16. The use of wave packet to analyze the dynamics of quantum mechanical systems is an increasingly important method to the study of the classical - quantum correspondence. using the quantum gaussian wave packet analysis method, we calculate the autocorrelation function of the rectangular billiard, the peak positions of the autocorrelation function match well with the periods of the classical periodic orbits, which show that the period of the classical orbits can be produced by the time - dependent quantum wave packet method. we also discuss wave packet revivals and fractional revivals in the rectangular billiard, the results show that there are exact revival for all wave packet at each revival time. we find additional cases of exact revivals with short revival times for zero - momentum wave packets initially located at special symmetry point inside the billiard

    利用波包分析量子力學體系的動力學行為在研究經典和量子的對應關系方面越來越成為一個非常重要的方法.利用高斯波包分析方法，我們計算了矩形彈子球體系的自關聯函數，自關聯函數的峰和經典周期軌道的周期符合的很好，這表明經典周期軌道的周期可以通過含時的量子波包方法產生.我們還討論了矩形彈子球的波包回歸和波包的部分回歸，計算結果表明在每一個回歸時間，波包出現精確的回歸.對于動量為零的波包，初始位置在彈子球內部的特殊對稱點處，出現一些時間比較短的附加的回歸
  17. The core of scm is to optimize and combine enterprises " internal and external business procedures by realizing information sharing, data exchanging and coordination among the enterprises, such as manufacturers, suppliers, retail traders, retailers and final customers, in the supply chain. it realizes higher efficient production, distribution, sell and service activity on the whole and increases the profit of enterprises by ways of shortening the cycle of delivering goods, reducing the turnover stock and reducing the response time of customers

    供應鏈管理的核心，是在生產商、供應商、分銷商、零售商和最終客戶之間，通過實現供應鏈環節中各企業的信息溝通、數據互換和協同工作，改造和整合企業的內部和外部業務流程，從而實現整體上更為高效的生產、分銷、銷售和服務活動，通過縮短交貨周期、降低周轉庫存、縮小客戶響應時間，增加企業的盈利能力。
  18. Based en the time frame of parts machining, this paper discusses the effect of process optimization under different time organizations en the shortening of processing cycle and gives practical suggestions for geisha kaizen in enterprises

    基於零件加工中的時間結構，探討不同時間組織下工序優化對縮短生產過程加工周期的不同效果，為企業正確開展現場改善活動提供參考。
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