預分頻 的英文怎麼說
中文拼音 [yùfēnbīn]
預分頻
英文
gptmtnpr-
We discuss the forecast method which based on wavelet neural networks by combining good time and frequency local analysis ability which wavelet analysis possesses with learning ability which neural networks possesses, and bring forward a frondose, banausic algorithm in this dissertation0 also, a essential thinking of combined forecast based on wavelet neural networks is described and a essential trait of combined forecast based on wavelet neural networks is pointed out
結合小波分析所具有的良好的時頻局部化分析能力和神經網路所具有的學習能力，討論了小波神經網路預測方法，並給出了其具體、實用的演算法。文中還描述了基於小波神經網路組合預測的基本思想，指出了利用小波神經網路進行非線性組合預測的特點。First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in ug software. the elastic contact problem is analyzed in finite element method ( fem ) and is used to the parameters " distribution and contact stress of the joint are obtained on the base of ansys code. with the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high / low cycle complex load is proposed
本文介紹了微動損傷的機理和微動疲勞壽命的研究方法；利用ug軟體對燕尾榫聯接結構創建了參數化實體模型；基於ansys軟體平臺求解彈性接觸問題，獲得了榫聯接結構接觸應力及接觸狀態量的分佈；在已有微動疲勞壽命預測模型的基礎上，引入載荷頻率影響因子，對低周、高低周復合載荷作用下的燕尾榫聯接結構進行了微動疲勞壽命的預測，與試驗結果對比表明採用本文提出的方法預測榫聯接結構的微動疲勞壽命是有效的。The system comprises three modules : the first is the ccd driver module, which controlled with cpld. programming the cpld to produce ccd driving pulses and synchronized communication signals. after preprocessing, the output video signals are transmitted into high resolution adc module, in which they are converted into digital signals, and then processed in arm processing module
整個系統分為三個模塊: ccd驅動模塊的核心是一片復雜可編程邏輯器件（ cpld ） ，對其編程產生ccd的驅動脈沖及同步控制信號;視頻輸出信號經預處理后，由高精度ad轉換模塊進行采樣，將ccd輸出的模擬信號轉換成數字量;最後，將數據送入arm處理系統中進行后續處理。In consideration of the crises of both the industrial water and the domestic water in the estuarial areas of the yangtze river caused by the decrease of the channel runoff and the intrusion of the sea water during the dry season in dry year, the concept, method and planning framework of the water resources allocation for the areas mentioned above along the main stem of the river are put forward herein based on the preliminary prediction of the future water demands by taking the water resources allocation therein during the dry seasons as the actual case in combination with the status quo of the water environment and water resources utilization concerned
摘要針對枯水年枯水季，因河道徑流量較少，鹽水入侵的頻率和強度顯著提高而引起的長江河口沿岸地區生產生活用水安全，文中結合長江口地區水資源利用和水環境現狀，以大通以下長江幹流地區在枯水季水量分配為實例，在初步預測未來河口地區水資源需求的基礎上，提出長江口地區水資源配置的思路、方法及方案框架。The prestress and harmonic response analysis method is used to study the unbalance response of a turbo - generator rotor and the displacement - frequency curve at a point of the rotor as well as the sress and strain at an appointed frequency are provided
摘要利用預應力及諧響應分析的方法研究了轉子的不平衡響應，得出在某頻率范圍內，轉子在指定點處位移對頻率的響應曲線以及在指定頻率處，整個轉子上的應力、應變響應的影響等。Hi this thesis, the technique of detector array is used to obtain the location of anomalous infrasound, it is the basic of the study of prediction of earthquake. to derive useful information by using spectrum analysis on infrasonic signal. then combing with other methods a forecast could be made
本課題主要是利用數字技術，採用用傳感器陣列計算異常次聲波波源的方位，這是今後預測震中位置研究的前提；並對次聲信號進行頻譜分析，提取有用的關于臨震次聲方面的信息，再結合其他的預報方法，作出準確的地震預報。Software - practice and experience, mar. 1994, 24 : 327 - 336. 13 han d, xiao c, zhou r et al. load shedding for window joins over data streams
分別採用了窗口計數器預估數組和頻率數組來維護相應統計信息，並在實際中使用樹狀數組取代頻率數組以提高計算效率Prescalar divider division ratio
可預置分頻器分頻比A new bit rate control strategy with both global pre - allocation and local segmentation ( glas ) for low bit rate application is proposed. first, it allots bit date to every frame in advance according to possessive rate of buffer, and then distribute different quantization parameters according conctete detail. by means of this method, buffer is controlled more particularly. and the quality of decoded image is improved, the traditional video image coding method, that is to say, the intraframe coding based on dct and the interframe prediction coding based on motion compensation, is not suitable for low bit rate compression and aside from this, the encoder is too complicated
它首先在總體上根據緩存器的佔有率給每幀預分配比特數，然後再根據具體細節給予不同的量化參數。使緩存器得到了更細致的控制，解碼圖像的質量有所改善。針對傳統的視頻圖像編碼方法，即幀內基於dct的編碼加幀間基於運動補償的預測編碼存在不適于低比特率壓縮，編碼器復雜等不足，討論了基於3 - ddct的xyz視頻圖像壓縮編碼方法，提出了3 - ddct系數的三維「 z 」形掃描方案，大大提高了編碼效率。In the paper, prescale technology, interpolate method, averaging method and multiple period synchronization method are used to measure the frequency accurately. diode demodulating technology, and power attenuated method or probe coupling & water load technology are employed to measure the power of high power microwave. isothermal technology is used to improve the stability of demodulator and to expend the range of square linear region
本文採用預分頻法、內插法、多周期同步法、平均法實現了頻率的精確測量;利用二極體檢波技術，結合衰減法或探針耦合+水負載技術實現了大功率微波功率的測量;採用恆溫技術提高了二極體檢波器穩定度;完成了單片機串口通信協議設計和系統電磁兼容的分析和設計。Secondly, we bring statistic coding, prediction coding, transform coding and analysis & synthesis coding into radar area. according to the properties of radar data, we take 4 methods, which are huffman coding ; prediction error model and lzw coding ; fft, uniform quantization in each frequency bank and huffman coding ; wavelet transform, uniform quantization in each frequency bank and lzw coding, to compress the genuine ground clutter radar data and give the corresponding results
根據雷達回波的特性，分別採用了huffman編碼法，預測誤差模型和lzw編碼法， fft 、分頻帶均勻量化和huffman編碼的壓縮演算法，小波變換、子帶均勻量化和lzw編碼的壓縮演算法等四種演算法，並給出了用這些演算法對真實的地雜波雷達回波數據進行壓縮的實驗結果。The adaptive front - end has the adaptive ability for the magnitude and frequency of input signals. it can prefilter for the input signals, eliminate the useless signals, and improve the dynamic range of receiver system. it can lessen the burden of digital signal processing in the back - end of receiver, and improve the performance of receiver system
自適應接收機前端對輸入信號有自適應能力? ?頻率自適應和幅度自適應，這樣的前端就可將系統的接收中心頻率和帶寬自適應到輸入信號的頻率和帶寬，其實就是對輸入信號進行一次預分選、預濾波，剔除對接收系統毫無作用的信號;同時對大信號自動減小增益，對小信號增加增益，提高系統的動態范圍;而且可以對干擾信號進行壓制。My time log laid it all out for me, showing me all the time drains i wasn consciously aware of - - checking email too often, excessive perfectionism doing tasks that didn need to be done, over - reading the news, taking too much time for meals, succumbing to preventable interruptions, etc
我的日程表清楚地顯示出時間在我無意識的狀態中流失? ?過分頻繁地檢查郵件、在那些實際上沒有必要的事情上苛求完美、通讀新聞、就餐時間過長、被其實可預防的干擾打斷等等。My time log laid it all out for me, showing me all the time drains i wasn ' t consciously aware of - - checking email too often, excessive perfectionism doing tasks that didn ' t need to be done, over - reading the news, taking too much time for meals, succumbing to preventable interruptions, etc
我的日程表清楚地顯示出時間在我無意識的狀態中流失? ?過分頻繁地檢查郵件、在那些實際上沒有必要的事情上苛求完美、通讀新聞、就餐時間過長、被其實可預防的干擾打斷等等。My time log laid it all out for me, showing me all the time drains i wasn ' t consciously aware of - - checking email too often, excessive perfectionism doing tasks that didn ' t need to be done, over - reading the news, taking too much time for meals, < font color = # 0000ff > succumbing < / font > to preventable interruptions, etc
我的日程表清楚地顯示出時間在我無意識的狀態中流失? ?過分頻繁地檢查郵件、在那些實際上沒有必要的事情上苛求完美、通讀新聞、就餐時間過長、被其實可預防的干擾打斷等等。This thesis discussed approaches of fault diagnosis based on the sensitivity analysis which is a new test method of analog circuits. main objects are described as follows : first, there exists a problem which the existence of solutions can not intuitively be predicted by choosing test frequency in the first - order sensitivity method on fault diagnosis
在此理論基礎上，本文從以下兩個方面進行嘗試:首先，一階靈敏度故障診斷方法存在這樣一個問題，即測試頻率的選擇不能直觀地對故障診斷方程解的存在性進行預分析。Based on dct domain r - d analysis, we provide a new constant bitrate ( cbr ) rate control algorithm, which can cure tm5 algorithm " two limitations, buffer conformance and scene cut problem. for variable bitrate ( vbr ) rate control, we proposed a single - pass vbr rate control algorithm for real - time video coding application
對于vbr碼率控制，作者還提出了一種面向實時視頻編碼應用的單通道vbr碼率控制演算法，它避免了多通道vbr演算法的多次編碼或預分析的開銷，減小了量化步長波動，可提供穩定的視頻質量。The voltage - controlled oscillator and the dual - modulus prescaler are the most crucial blocks in the pll frequency synthesizer. two kinds of voltage - controlled oscillator ( the quadrature voltage - controlled oscillator based on symmetrical spiral inductors and differential varactors, and the voltage - controlled oscillator with wide tuning range based on mos varactors ) and two kinds of prescaler ( the prescaler using phase - switching techniques, and the prescaler using dynamic circuit techniques ) are proposed. then, the complete pll frequency synthesizer is implemented, in which
壓控振蕩器和雙模預分頻器是鎖相環型頻率合成器中最關鍵的兩個模塊，本論文分別實現了兩種類型的壓控振蕩器（採用對稱螺旋型電感和差分二極體型容抗管的正交壓控振蕩器和使用mos型容抗管的大調諧范圍壓控振蕩器）和兩種類型的雙模預分頻器（使用相位開關技術的雙模預分頻器和使用動態電路技術的雙模預分頻器） 。Mature embryo - derived calli of japonica rice ( oryza sativa l. ) cultivars nipponbare were transformed using agrobacterium tumefaciens strain agl1 carrying a binary vector pcas04 harboring the marker gene, neomycin phosphotransferase gene ( nptii ), driven by a promoter from the ubiquitin gene in maize, a promoterless p - glucuronidase gene near to the left border of t - dna for trapping gene and a strong promoter, rice actin - gb promoter, near to the right border of t - dna as activation tagging. in this system, co - cultivation was simplified, special selection stages and pre - regeneration stage were omitted, the whole process was almost under continuous light at 30 ? except co - cultivation and transgenic plants began to generate only after 7 weeks calli were induced
在一步轉化系統中，光照高溫條件下培養的水稻愈傷組織從誘導開始經過4周時間就可以達到轉化實驗的要求，並且簡化、優化了整個共培養過程，省去了一篩、二篩和預分化步驟，只用7周的時間就可以初步得到再生轉化植株；共191塊愈傷組織得到125塊抗性愈傷組織，轉化頻率達到65 . 4 ，最後共得到99棵獨立來源的再生植株，抗性愈傷組織再生頻率達到79 . 2 。Next, mathematical models concerning the bullwhip effect are set up to analyze this effect. models presented here reveal how the lead time, frequency of demand forecast and the price fluctuation affect the bullwhip effect and prove that information sharing can mitigate the bullwhip effect. in addition, a variety of corrective actions are recommended to reduce the bullwhip effect and improve the efficiency of supply chain management
接下來，用定量的方法建立起了相應的數學模型對「長鞭效應」進行了深入分析，揭示了訂貨提前期、企業需求預測頻率的變化以及價格波動對長鞭效應的影響，並且證明了供應鏈的信息共享可以弱化「長鞭效應」 。分享友人