front ratio 中文意思是什麼
front ratio
解釋
比移值-
Also call to pour the type to open the bore box a box for, department on the box the front - panel openning having pouring the bore. because of openning to there is bore, voice in the box to can then radiate the outside. pour the type the box the low frequency extension for ratio closeness type box to be good friends with the amount, but the bass usually and not and so fructify the tightly packed. comparison " infinite baffle " infinite baffle
也稱倒相式開孔箱，系在音箱面板上開有倒相孔槽的一類音箱。由於開有孔，箱內的聲音便可以輻射到外面來。倒相式音箱比密閉式音箱的低頻延伸要好些，但低音往往不那麼結實緊湊。 -
With the established rf front - end system simulation platform, adding the digital modulated baseband signal, this paper simulated the multifold digital modulated signal ’ s transmission, such as 2ask, qpsk, and 16qam. then researches of power compression and phase noise of local oscillation influence the bit error ratio for different modulated system. the designing is satisfied multifold functions request with the high - powered and integrated broadband rf front - end
隨后在建立的寬帶射頻前端通用模擬平臺上，加入基帶數字調制信號，對多種數字調制格式的信號在該通用平臺上的傳輸作了研究，模擬了2ask 、 qpsk和16qam等調制格式信號的發射與接收，研究了功率壓縮和本振相位噪聲對不同調制的誤碼率影響，實現了滿足多種功能要求的寬帶高性能綜合射頻前端的設計。 -
Owing to complicated earth ' s surface condition such as the steep stratum outcropping of front - zone of mountain or the huge thick gravel stratum ' s overlay and earth ' s surface large undulation, complicated underground geology structure developed extremely such as thrust and overthrust nappe, and violent change of the lateral velocity, etc. in front - zone of mountain there are a series of problems such as serious secondary disturbance and low signal - to - noise ratio in seismic exploration gathering
由於山前帶高陡巖層出露或巨厚礫石層的覆蓋、地表起伏大等復雜的地表條件、逆沖和逆掩推覆等復雜地下地質構造發育、速度橫向變化劇烈等原因，造成了山前帶地震勘探資料採集存在次生干擾嚴重和信噪比低等一系列問題。 -
The thermal visualizations of jet impingement cooling with single or double row holes inside semi - enclosed channel are measured by using infrared camera and then the impingement cooling heat transfer coefficients are deduced. the effects of flow and geometry parameters on convective heat coefficients are obtained. the results show that : for a single row normal impingement, the impingement cooling effectiveness is enhanced with the increase of impinging reynolds number or the decrease of hole space to diameter ratio, and the best effectiveness is achieved under the jet - to - surface spacing equals to 2 ; when the jet is oblique to the confined wall, the cooling effectiveness is weaken especially under the jet - to - surface spacing ratio is greater than 2 ; for double rows normal impingement cooling, the cooling effectiveness of rear row jet is weaker than the front row under lower impinging reynolds number or bigger jet - to - surface spacing
對于單排垂直射流，沖擊冷卻效果隨射流雷諾數的增加、孔間距與直徑比的減小而得到提高，沖擊間距比為2時換熱效果最好;沖擊孔中心線向通道封閉一側傾斜后，射流沖擊冷卻的范圍變窄，當沖擊間距比大於2時駐點區的對流換熱能力明顯降低;對于雙排沖擊射流，孔排間距與直徑比的增加使沖擊冷卻范圍變大，但在兩排孔之間區域的對流換熱系數有所下降;在較小的沖擊射流雷諾數和較大的沖擊間距比下，後排射流的沖擊換熱效果要遜於前排射流。 -
Generally, tidal bore is wave alignment moving upstream estuary, and its surface will break when the wave alignment is strong, which leads to water roll tracing the source. the velocity, which is between small - disturbed wave velocities before tidal bore happens and the one after tidal bore happens, increases with the ratio of tidal bore height to the water depth in wave front
涌潮一般是向河口上游推進的波列，強度大時，表面破碎，進而發展成溯源推進的水滾，其傳播速度隨涌潮高度與波前水深比值增加，大小介於涌潮前後小擾動波波速之間。 -
Speech enhancement as the front - end processing module is used to improve the signal - to - noise ratio ( snr ) of the input signal for recognition in the latter stages
為了讓語音識別系統在安靜的環境和有噪聲的環境中都獲得令人滿意的工作性能，研究了一個將語音增強器和語音識別器級連起來的系統。 -
( 2 ) on the leading edge, the film cooling effectiveness at the zone immediately downstream of the cooling holes is affected by blowing ratio and mainstream reynolds number, while the effects are not important in the downstream zone far from the cooling holes. ( 3 ) on the front half of pressure surface, the effectiveness increases with decreasing blowing ratio at the downstream near the cooling row and it is contrary at the downstream far from the cooling row. ( 4 ) on the rear pare of the pressure surface, the effectiveness decreases with increasing blowing ratio and does not vary so much downstream in the cases of higher blowing ratio
研究結果表明葉片吸力面端壁附近區域壓力系數分佈呈現出較強的三維特性，動葉吸力面尤其明顯；氣膜孔流量系數隨吹風比的增加而增大，在高吹風比情況下，流量系數逐漸趨于常數；在不同型面區域，冷卻效率分佈有較大的差異，而且吹風比與主流雷諾數的影響程度也不盡相同；低吹風比下，孔出口下游附近可以得到較好的冷卻，中、高吹風比下，冷氣射流在加速流動主流的作用下返回壁面進行二次冷卻，孔下游較遠區域可以得到較好的冷氣覆蓋。 -
( 2 ) learning from the related study results of the scholars home and abroad, 14 micro factors influencing residential land price in hangzhou and shaoxing have been defined through interview and delphi method, including the distance from the city center, public transportation, hospitals, colleges & universities, junior high schools, primary schools, environmental quality, the distance from the city ' s main artery, geology, the means of the land grant, front foot, floor area ratio, building density and green coverage
（ 2 ）借鑒國內外學者的有關研究成果，通過訪談和專家評分，確定了杭州摘要浙江大學博士學位論文和紹興兩城市的14個居住用地價格微觀影響因素，包括城市中心影響度、公共交通因素、醫院因素、大學因素、初中因素、小學因素、環境質量、到城市主幹道距離（杭州為到城市快速道路距離） 、自然條件、土地交易方式、樣本項目沿街長度、容積率、建築密度和綠化率。 -
In the paper, some key technique such as low - order modes correction for wave - front error, normalized phase power spectrum, atmospheric turbulent phase structure function, the residual phase structure function after low - order correction and strehl ratio are all analyzed
提出了利用自適應光學系統校正低階模式波前誤差的方法與理論依據，引入規格化的相位譜，推導了大氣湍流相位結構函數、低階模式校正後的殘余相位結構函數以及斯特列爾比。 -
When streams have high arrival rates, we propose an approach incorporating front - shedding and rear - shedding, and find an optimal trade - off between them. as for the scenarios of variable speed ratio, we develop a plan reallocating cpu resources and dynamically resizing the windows
例如在數據流上作連接操作時，因為流數據的在線無界速度可變等特性，通常採用的做法是改變連接的語義，將參與連接的元組集合限制在滑動窗口上進行。 -
Though the desalinized depth was different under different cumulative infiltration, the ratio of desalinized depth and wetting front distance was about 0. 342 and the ratio of desalinized depth and cumulative infiltration was 0. 862
盡管不同濕潤深度對應脫鹽深度不同，但脫鹽深度與濕潤深度的比值卻近似為0 . 342 。且脫鹽深度與入滲水量的比值也近似為0 . 862 。 -
When running at a steady speed, the load is divided between the car ' s front and rear wheels in a fixed ratio
重心轉移當你的車子在以一個固定的速度行駛時，車子的重量是以一個固定的比例分配在前輪和后輪上的。 -
The ratio of mach number between lateral jet and free flow induce intensity degree of jet interaction. it has no obvious difference between two interactions with two types of nozzle exit configuration, rectangle and ellipse. the shock in front of jet results in increase of shock resistance and the jet ejection causes increase of base resistance
研究表明，側噴流與來流馬赫數之比是影響繞流場的重要因素，該值越大則側噴干擾越強烈，矩形和橢圓形兩種側噴口形狀對側噴流場干擾波系的影響並不明顯。 -
The experimental results of low - order modes correction for wave - front error and the enhancement of strehl ratio in detector and the improvement of wave - front tilt are also established
通過低階校正模式波前誤差提高了探測器接收光強，並有效校正了波前傾斜。 -
With its minimized structure, the path provides an optimal light - amplifying ratio ; ( iii ) the position sensitive detector ( psd ) is just located in front of the visual sight of operator, this makes the observation and operation more easily
該系統設計有特殊的光路，結構簡潔，體積小，通過多次反射提高反射臂的光程，保證了最佳的光杠桿放大比；同時，檢測系統中的位置敏感元件（ psd ）光敏面位於正對視線的方向，易於afm系統的操作和觀察。 -
Ratio of the front to back wave
波束前後向比值 -
The i for according to front or p proceeds estimate, because of but compress ratio to want higher than i, the data measure the average to attain the i of 1 3 or so. p p for b for is rightly in front and back with subsequencep a basis of front for iswhich have error marginning, if p is also p, can result in the error margin to spread
P幀根據前面的i幀或p幀進行預測，因而壓縮比要比i幀高，數據量平均達到i幀的1 3左右。 p幀是對前後的b幀和后繼的p幀進行解碼的基準幀。 p幀本身是有誤差的，如果p幀的前一個基準幀也是p幀，就會造成誤差傳播。 -
Based on the macneille design and the basic principle optical thin film, we improve the extinction ratio of pbs through changing the structure and interference that can erase the p polarizing refractive both on the front and back side
從棱鏡的設計原理和薄膜光學的理論基礎為出發點，通過改變棱鏡的結構形式提高其消光比：利用干涉方法消除了前後通光面p光的反射。 -
The research work of the thesis include mainly : ( 1 ) observe a phenomenon which the two fracture modes are simultaneously found near crack tip of a four - point - bend specimen when the ratio of m / q is close to 3. 0mm, criteria m / q, when the fracture mode of four - point - bend specimen transits from void - mode to shear - mode. intensely location plastic distortion is observed in the front of crack tip and the macro - fracture of the specimen with the same m / q belongs to shear - mode fracture
本文主要在以下幾個方面取得了一定的進展：通過四點彎試件的斷口和切片試驗，觀察到裂紋尖端同時存在兩種斷裂機制? ?在兩種斷裂模式相互轉化的臨界狀態附近，裂紋前方既有鈍化和延伸區中的空穴形核擴張，又有銳化角前劇烈的集中剪切變形。
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