propagation rate 中文意思是什麼

propagation rate 解釋
傳播速率
  • propagation : 持續培養
  • rate : n 1 比率,率;速度,進度;程度;(鐘的快慢)差率。2 價格;行市,行情;估價,評價;費,費用,運費...
  1. Firstly, second harmonic component ratio and dead angles of two phase inrush ' s dispersion in three - phase transformes are acted as input variable. secondly, the method applies improved algorithm based on the original algorithm of multi - layer forward back propagation network, that is to say, adding last variational effect of weight value and bias value to this time and making use of variable learning rate. at the same time, this method also adopts dynamic form in the number of hidden floor node

    首先,文中將三相變壓器兩相涌流差流的二次諧波含量比和間斷角作為網路的輸入變量;其次,利用對原有bp網路訓練演算法基礎上的改進型演算法(即在計算本次權值和閾值的變化時增加上一次權值和閾值變化的影響以及採用變學習率,與此同時隱含層神經元個數採用動態形式) ,通過樣本訓練使網路結構模型達到最優。
  2. Procreant knowledge expression and forward inference engine are adopted in the method of fault diagnosis based on expert system theory. in the fault diagnosis applying neural network theory, six kinds of improved arithmetic of back - propagation arithmetic, including gradient descent with momentum, variable learning rate back - propagation, resilient back - propagation, quasi - newton, levenberg - marquardt and conjugate gradient, are applied to diagnose the faults of electric load manage center and solid state power controller. different diagnostic results gotten by simulation are compared at last

    在基於專家系統的故障診斷方法中,採用了產生式知識表達和正向推理機制;在基於神經網路的故障診斷方法中,則分別採用了bp神經網路的附加動量法、自適應學習速率、彈性bp演算法、擬牛頓法、共軛梯度法和levenberg - marquardt法對電氣負載管理中心和固態功率控制器的故障進行診斷,並對由模擬得到的不同診斷結果進行比較。
  3. Ignored the amplified spontaneous emission ( ase ) and esa, rate equations and propagations equations for continuous wave er ~ ( 3 + ) / yb ~ ( 3 + ) co - doped phosphate glass waveguide laser were calculated using runge - kutta algorithm. propagation characteristics of signal and pump light in the waveguide were analyzed too

    利用fd - bpm法,對在平板波導以及波導折射率為漸變折射率分佈的溝道波導和掩埋型波導內傳播的波長為980nm的泵浦光和1540nm的信號光的光場進行了模擬。
  4. The general nonlinear propagation equations of four - lightwaves in birefringent fibers are deduced. the characteristics of polarization mode dispersion in 4 + 10gb / sdwdm system in dispersion - flattened fibers is studied. our results show that pmd exerts a detrimental influence on 4 x logb / sdwdm system in limiting transmission rate and the channel numbers

    本論文研究波分復用( wdm )系統中偏振模色散的影響,主要工作包括下面兩個部分:一、導出了四波長光波在雙折射光纖中傳輸所滿足的一般非線性耦合方程;在此基礎上,研究色散平坦光纖中4 10gb sdwdm系統的偏振模色散特性,並且進一步研究了偏振模色散對不同通道間隔的4 10gb sdwdm系統的影響。
  5. The contrast experiment of twig propagation of fast - growing castanopsis fissa by four treatments in three different cutting medium indicated : the cutting medium has a significant effect on the survival rate, the interaction of the cutting treatment and the cutting medium has evident effect on the survival rate. castanopsis fissa twig which is cut and planted at once has the best survival rate in the cutting medium of garden soil mixed with sands. it reaches 87. 5, but in the garden soil, it reaches only 70, and in other mixture, it is below 20. therefore, had better be planted in the medium of garden soil mixed with sands, and be planed after cutting at once

    速生菇木樹種? ?黧蒴栲嫩枝經過3種插床基質和4種插條處理的扦插對比試驗,結果表明:插床基質對其扦插成活率有極顯著影響;插條處理及其插床基質的交互作用對扦插成活率存在顯著影響;黧蒴栲嫩枝扦插在園土十河砂混合基質上現剪現插最好,成活率可達87 . 5 ,在園土基質上現剪現插次之,成活率可達70 ;而其它組合成活率都不到20 ,黧蒴栲嫩枝扦插生產上應選用園土或園土+河砂作為插床基質,並要現剪現插。
  6. The ultrasonic quenching of medium carbon alloy high strength steel 35crmnsi was conducted, using h66025t ultrasonic generator. the result showed the mertensite lath was fined obviously and the nucleation rate was improved. it proved the theory that the propagation of elastic wave in austenite can promote the nucleation of martensitic transformation

    採用h66025t超聲波發生儀,對中碳合金高強度鋼35crmnsi進行超聲波淬火,發現馬氏體板條明顯細化,提高了馬氏體相變形核率,證實了彈性波在奧氏體中傳播促進馬氏體相變形核理論。
  7. Approximate calculation of crack propagation rate of metal corrosion fatigue

    金屬腐蝕疲勞裂紋擴展速率的近似計算
  8. Then, after computing xpd induced by rain, its forecast model at different propagation distance is found. this paper also discusses the relation of reflectivity of rain with rainfall rate, taking different polarization wave into account, and that of fog with visibility

    在研究了雨、霧介電特性的基礎上,計算了雨的去極化解析度,得到了不同頻率、不同傳播距離的去極化解析度預報模型;計算了不同極化狀態的波的反射率隨降雨率的變化規律。
  9. There is connection between the corrosion expansion force and the corrosion rate of rebars, the corrosion of rebars and its propagation process can be known by monitoring the change of resistance of cfrc, and corrosion of rebars can also be monitored on real time, on line and undamaged with compression sensitivity of cfrc

    鋼筋銹脹力與鋼筋的銹蝕率有一定的關系,監測cfrc的電阻變化就可以定量地了解鋼筋銹蝕的發展,利用cfrc的壓敏性實時地、在線地、無損地監測鋼筋的銹蝕情況。該方法靈敏度高,是行之有效的。
  10. Studies on the fatigue crack propagation rate ( fcpr ) indicate that load ratio ( r ) has a great effect on the fcpr : the greater load ratio is, the higher the fcpr becomes, and the lower kth shows. compared with load ratio, the thickness of the specimen has a lower effect on the fcpr

    對鎂合金的疲勞裂紋擴展特性的研究表明:載荷比r對鎂合金az91 , am50裂紋擴展行為具有很大的影響。 r值越大,裂紋擴展速率越高,疲勞門檻值k _ ( th )越小;試樣厚度t對鎂合金az91 、 am50穩態裂紋擴展速率的影響沒有r值那麼明顯。
  11. After the treatment of multi - layers magnetization, far infrared ray radiation and the incandescence light effect, the sterilization rate can reaches 80 %, and can effectively reduce the bacteria ' s propagation space

    水通過多層磁化及遠紅外線輻射及白熾光的作用,使水中的細菌殺死率達到80 %以上,減少細菌的繁殖空間。
  12. The gain characteristics of edwa have been investigated by solving numerically propagation equations and rate equations at pump wavelength 980nm. the gain characteristics are functions of waveguide length, erbium concentration and pump light power, so the relations between them are analyzed in detail in this paper. the size of edwa is also discussed here, which has some reference value for the following study and the design of waveguide amplifier

    通過解析速率方程和傳輸方程,在波長為980nm泵浦光作為泵浦源的條件下,對摻鉺光波導放大器的增益特性進行了分析,由於波導放大器的增益是波導長度、摻鉺濃度和泵浦功率的函數,因此本論文對三者與信號增益的關系分別進行了討論。
  13. The error propagation path is changed because that the different substream sets are selected for specific spatial and temporal resolution, but this rate - distortion model is adaptive with different error propagation paths. we can easily estimate the distortion at different error propagation situation

    盡管在復雜的可擴展視頻編碼技術中,誤差傳遞路徑會隨著選擇播放的子碼流集不同而變化,本文建立的模型卻能夠自適應誤差傳遞路徑的變化,估計出較為準確的失真信息。
  14. Standard test method for linear flame propagation rate of lubricating oils and hydraulic fluids

    潤滑油和液壓液線性火焰傳播速度的測試方法
  15. Testing method for crack initiation and propagation rate in steam turbine metals at elevates temperature

    汽輪機.金屬高溫裂紋開裂和擴展速率試驗方法
  16. In this paper, through the statistical analysis of the random factors in the stage of sub - critical propagation of cracks, the statistical correlation equations between the two material coefficients are obtained and can be generalized. furthermore, it can be concluded that cracks propagation rate is influenced greatly by material coefficients in the condition considered in this study

    本文主要通過對亞臨界裂紋擴展階段各種隨機因素的統計分析,找到了可以推廣應用的,體現兩材料系數之間具有強負相關性的統計相關式,並驗證了在一定條件下,材料系數是影響裂紋擴展速率的主要因素。
  17. The time serial of short fatigue cracks ' propagation rate is modeling and predicting by using neural network in this article, and the good result is achieved

    文中利用神經網路對短裂紋擴展速率進行時序數據建模與預測,取得較好的效果。
  18. The initiation and growth of short fatigue cracks is a nonlinear kinetic process, and the short fatigue cracks ' propagation rate is characterized as chaos and self - organized

    摘要短裂紋的萌生與擴展是一復雜的非線性動力學過程,短裂紋擴展速率具有非線性動力學系統的混沌現象和自組織特徵。
  19. The report of determination for interface delamination propagation rate of real flip chip packages is hardly found up to now

    目前,測定實際倒裝焊封裝界面分層傳播速率報道尚少見。
  20. New test method for linear flame propagation rate of lubricating oils and hydraulic fluids

    潤滑油和液壓液的線性傳播速率的測試新方法
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