rotating time 中文意思是什麼
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The integral equations governing the three - dimensional viscous flow inside the turbo - machinery in the rotating coordinate system are presented in this paper, the viscous effects are simulated by the distributed body force described by professor denton j. d. the time - marching method and explicit finite volume difference scheme are employed to solve the flow inside the turbo - machinery
本文給出了相對旋轉坐標系下葉輪機械內部三維粘性流動的守恆型積分型方程組，利用dentonj . d .教授的粘性體積力法來模擬粘性對葉輪機械內部流動的影響，採用時間推進法和有限體積差分格式對葉輪機械內部的流動進行求解。 -
Rotating laser is used in earth measurement, mechanical engineering installation and building widely. especially in the upholstery, it can offer a real time standard plane for upholsterer on the walls using rotating laser
激光掃平儀廣泛應用於大地測量、機械工程安裝及建築業等施工過程中，特別是在建築內部的裝修中，旋轉的激光束在墻面上形成光束水平面，實時提供一個共同的施工基準。 -
The particle size can be controlled by adjusting processing conditions such as milling time, rotating speed of milling pan, static pressure between milling pans and milling temperature, etc. average article size of the powder reduced to micrometer scale in relatively short time and a fraction of which even reached nano scale
利用聚丙烯和尼龍6之間約60oc的熔點差，在200oc左右加ippch6復合粉體，可以使pa6保持固體超細粒子狀態， pp則熔融成為連續相，得到了pa6超細粒子均勻分散的ppch6共混體系。 -
The growth of f - 16 and the production of enzyme were affected by microbial medium, including c source, n source, mineral, initial ph of medium, rotating rate, culture time and culture temperature. the results showed that the optimal n sources were peptone, corn steep liquor and yeast extract ; the optimal c sources were sucrose, glucose and maltose ; the optimal minerals were mgso4 7h2o, khpcu and cuso4 5h2o
實驗表明，氮源中蛋白腖、玉米漿、酵母粉比較好；碳源中蔗糖、葡萄糖、麥芽糖這三種糖對產酶和生物量提高效果顯著；無機鹽中mgso _ 4 ? 7h _ 2o ， k _ 2hpo _ 4 ， cuso _ 4 ? 5h _ 2o對產酯酶的酶活及其反應后所得水解液的光學純度有較好的作用。 -
The analysis results show that the palcement styles and the rotating angles of such a large scale deployable boom systems are functional importantly. the motions and damps of the boom systems also take importance. if motions become larger, the time for the booms to reach their spreaded states is shorter, and the impact velocities become larger, the impact accelerations become larger too
分析結果表明，對于大尺度的伸桿機構，其布置方式和展開角度對其展開運動有重要的影響；同時也研究了鉸鏈處外力矩對展開運動的影響，隨著該力矩的增大，伸桿到達鎖定狀態的時間減少，碰撞時的速度增加，由此產生較大的加速度；分析了伸桿彈性和阻尼對伸桿展開過程的影響，彈性增大碰撞加速度增大，阻尼增大加速度減小，因此可將鉸鏈處外力矩和伸桿阻尼作為伸桿展開運動調節的手段。 -
Since the starry heaven is rotating from east to west, exposure time has to be limited in order to obtain a point image. the limiting exposures are as follows
由於星空不斷由東向西轉動，若要保持星點在底片上呈點狀，最長曝光時間如下： -
The main works are shown as followings : in order to get best economic benefits and quickest time response, the advantages and shortages of existing methods for machining twin - screws are analyzed. in view of the production of co - rotating twin - screw is various and mostly in small batch, a new approach for forming cylinder helical surface with milling cutter is put forward. it presents the theoretical foundation for machining of twin - screw
論文主要工作有如下幾點：針對同向雙螺桿產品零件的多品種、小批量的生產特點，為了取得最佳經濟效益和快速地時間響應，在查閱了雙螺桿加工有關的國內外文獻資料，研究分析了雙螺桿各種現有的加工方法的優缺點，提出了一種新的加工方法? ?用圓柱立銑刀成形加工雙螺桿螺旋面。 -
Intelligent counter digital frequency rotating speed line velocity display control transmit instruments are all adopt used advanced microprocessor for smart control. input is pulsed quantity or contect switch quantity signal, after cpu operation processing, count, rotating speed or line velocity will be clearly intuitional indicated by high brightness led numeral tube, at the same time, these signals can be changed into standard voltage current signal to transmit output. and have the functions of super - limited alarm, standard serial communication function
簡易后備操作器接收從dcs系統或pid調節器給定的模擬量信號，正常控制時，操作器輸入輸出相當于直通的，以實現dcs系統或pid調節器對執行機構的自動控制，當前級dcs系統或pid調節器發生故障時，操作器接收到故障狀態信號，即轉為手動控制狀態，由按鍵控制操作信號的輸出，當故障解除，儀表自動恢復自動狀態。 -
Are all adopt used advanced microprocessor for smart control. input is pulsed quantity or contect switch quantity signal, after cpu operation processing, count, rotating speed or line velocity will be clearly intuitional indicated by high brightness led numeral tube, at the same time, these signals can be changed into standard voltage current signal to transmit output. and have the functions of super - limited alarm, standard serial communication function
接收從dcs系統或pid調節器給定的模擬量信號，正常控制時，操作器輸入輸出相當于直通的，以實現dcs系統或pid調節器對執行機構的自動控制，當前級dcs系統或pid調節器發生故障時，操作器接收到故障狀態信號，即轉為手動控制狀態，由按鍵控制操作信號的輸出，當故障解除，儀表自動恢復自動狀態。 -
With compensation of signal ’ s time delay from different radiating element by phase shifters, phased - array antenna can control array beam easily. because there are no mechanical devices for rotating beam, the phased - array antenna system can scan everywhere in beam covered areas in millisecand by stepping the phase shifters. it improves the tracking velocity of antenna towards the object, and becomes the development trends of weapon system antennas
相控陣天線利用移相器補償信號到達輻射單元時間的差異，從而控制波束方向;天線沒有機械旋轉問題，只需改變移相器的設定值，波束便可以在毫秒級內掃描其覆蓋空域內的任何地方，提高了天線對目標的跟蹤速度，是目前武器系統天線的發展方向。 -
The adding of process - control agent can effectively keep the powder from sticking to the milling ball and the inner wall of containers. the increase of rotating velocity and the ratio of ball to powder can accelerate the phase transformation and thus shorten the alloying time
加入過程式控制制劑，可以有效地防止粉末粘覆磨球和罐內壁；球磨轉速的提高和球粉比的增加，都會加速相轉變過程，從而縮短合金化時間。 -
According to the time variation and feature extraction difficulty of rotating machinery vibration signals, the rule of choosing wavelet basis function and wavelet denoising soft - thresholding value is proposed after making further research on wavelet transform technique, using for denoising rotating machinery vibration signals the conception of " energy " is proposed, based on the theory that signals energy in all frequency can be affected by faults deeply, to construct feature vectors of rotating machinery vibration signals which can give a convenient disposal way to fault feature extraction and fault intellectual diagnosis
針對旋轉機械振動信號的非平穩性及特徵難以提取的特點，通過對小波變換技術的進一步研究，提出旋轉機械振動信號處理的小波基函數選擇原則及小波包消噪的軟閥值原則。利用小波包變換對旋轉機械振動信號進行消噪處理和特徵提取。並以「能量」為元素，構造旋轉機械振動信號的特徵向量，從而為旋轉機械振動信號的故障特徵提取以及后續的故障智能診斷提供了一種便捷的處理方法。 -
Fourth, the membrane recovering method was found within stationary tubular membrane elements and was compared with rotating flow by using experiment, that is, the unloading pressure recovering method is one of the most efficient method, it may reduce the auxiliary time, such as washing, backflush, reverse filtration, but the tubular membrane is washed or backflush or changed after the cycle period are accumulated numerous times
第四、對旋轉流靜止管式膜的再生進行了實驗比較，並提出了旋轉流膜管可以通過卸壓再生，以減少膜管每次使用后的沖洗、反吹等輔助時間，採用該種方法再生的膜管其滲透通量完全能滿足要求，當循環使用一定次數后再進行或沖洗或反吹或更換新膜管。 -
Based on the " research on the new method for rotating machine faults diagnosis based on independent component analysis " ( national nature science fund project, no : 50205025 ) and " study on the new method of corba - based distributed calculation tactics construction in remote condition monitoring and diagnosis " ( zhejiang province nature science fund project, no : 501061 ), this paper aimed to the rotating machinery faults diagnosis oriented time - frequency analysis. the emd - based basic theories and methods were studied ; to weaken the emd method ' s end effect, some new data extention means were proposed ; to improve the emd method ' s precision and efficiency, some new algorithms were proposed ; the emd based time - frequency analysis software was designed and developed ; a experiment system at the base of rotor test bed was built to study the ro tor faults diagnosis using the new time - frequency analysis method, then studed several typical faults
本文結合「基於獨立分量分析的旋轉機械故障診斷新方法的研究」國家自然科學基金項目（ 50205025 ）和「基於corba分佈計算策略構建遠程監診的新方法研究」省自然科學基金項目（ 501061 ） ，以面向大型旋轉機械故障診斷的時頻分析為目標，研究了該方法的基本原理和演算法：針對其端點效應等不足，提出了新的數據延拓技術；針對emd演算法的精度和速度上的不足，提出了新的改進演算法；設計和開發了基於emd時頻分析的軟體系統；以模擬轉子實驗臺為基礎構建了實驗系統，並進行了實驗研究。 -
The experimental results show that the method can accurately extract variable amplitude and frequency order in time domain, and is suitable for vibration response character extraction of rotating machinery
實驗結果表明，該方法能夠在時域中準確地提取幅值和頻率變化的階比，適合於旋轉機械振動響應特徵提取。 -
The tunable performance is obtained by rotating the grating. the disadvantages of the mechanical tunable filter are high control voltage, slow response time and big volume. the electro - optic tunable filters are obtained by the alteration of the birefringence of the electro - optic material applied voltage
電子光學濾光片則是通過施加電壓使各種電子光學材料的雙折射率發生變化來實現透射波長的調諧，也可以利用電光晶體在電場中的旋轉來實現波長的調諧。 -
Specially designed for the cylinder of the carding machine, fsm model motor is suitable for big rotating inertia and long staring time under the working conditions of plentiful dust, short fibers, high temperature and high humidity
本型電動機專為梳棉機錫林（大滾筒）配套設計，主要適用於轉動慣大、起動時間要求長、多塵埃、短纖維、溫濕度較高的條件下工作。 -
Ill the time - varying sliding surface is obtained by rotating and / or shifting the initial sliding mode surface, and the existence of sliding mode with the time - varying sliding surface is proved
通過旋轉和平移初始滑模面得到一個時變的滑模面，並證明了在此滑模面條件下滑動模態的存在性。 -
At last, the valid data based fast emd algorithm was proposed. chaper five aimed to the requirement of the emd based time - frequency analysis in the field of rotating machinery signal analysis and fault diagnosis. studied the method of rotatory speed prediction to improve the precision of complete period sampling of vibration signals in rotating machinery, then, discussed the phenomenon of mode fission in noise signal anlysis by emd and provided the filter method to weaken the phenomenon. after then, found a process to analysis the signals using emd - based method in the field of rotating machinery signal analysis and fault diagnosis
第五章針對旋轉機械信號進行emd時頻分析的要求，提出了提高整周期采樣精度的預測演算法和適合於單片機計算的近似公式；論述了模態裂解現象，並通過模擬信號和實際信號的研究，提出了使用濾波技術來減弱模態裂解現象的方法；給出了適合於旋轉機械振動信號基於emd時頻分析的工作步驟；研究了基於emd的旋轉機械振動信號自適應濾波技術。 -
The function of the controlling system comprise time sequence control of rotating field, data collection and serial communication etc. it avails the automation of finishing process and the interface to other system by using micro - controller
本文採用單片機來實現脈沖控制的旋轉磁場，實現的功能有旋轉磁場的時序控制、數據採集和通信等。採用單片機有利於加工過程的自動控制和與其它系統的介面。
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