decay rate 中文意思是什麼

decay rate 解釋
衰變率
  • decay : vi. 1. 朽，腐爛。2. 衰減，衰退。3. 凋謝，枯。vt. 使朽壞；使衰退。n. 1. 衰微，衰退。2. 朽，腐爛。3. 【無線電】衰變。
  • 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. Given the decay rate of 26al, the lower initial ratio in the chondrules implies that these objects formed between one million and two million years after the creation of the refractory inclusions ( assuming that the radioisotope was indeed homogeneously distributed in the early solar system )

    以鋁26的衰變速率估計，這些球粒的初始比值較低，表示它們是在耐火包體產生后100 ~ 200萬年才形成（假設鋁26在早期太陽系中確實是均勻分佈的） 。
  2. The hyperbolic conservation laws with relaxation appear in many physical systems such as nonequilibrium gas dynamics, flood flow with friction, magnetohydrodynamics, etc. firstly, the thesis proves that there exists a unique global smooth solution for the cauthy problem to the hyperbolic conservation laws system with relaxation ; secondly, in the large time station, the thesis proves that the global smooth solutions of the hyperbolic conservation laws system with relaxation converge to rarefaction waves solution at a determined l ( p > 2 ) decay rate

    帶鬆弛項的雙曲型守恆律組出現在諸多的物理系統中。例如，非平衡態的氣體動力學、帶摩擦的水流、磁動力學等。本文首先證明，帶鬆弛項的雙曲型守恆律組的柯西問題的整體光滑解的存在唯一性；其二，證明了帶鬆弛項的雙曲型守恆律組的解與相應的平衡態守恆律的稀疏波解在大時間狀態下的l ~ p衰減率。
  3. The actual rate of decay may be somewhat greater or less than this expected rate.

    衰變的實際速率可以比這個預期速率稍大些或稍小些。
  4. In section one, we analyze the mechanism of lwi gain, and study the effects of the rabi frequency q of the driving field, the injection rates ratio rb / r ~, the exit rate r0, the decay rates ~ and rab between atomic levels, as well as 3 incoherent pump rate r on the gain without inversion, dispersion and population difference of the system. in section two, we discuss the effects of the detuning of the driving field and the probe field on the gain

    在第一節中分析了無粒子數反轉激光增益產生的機制、研究了驅動場的rabi頻率、粒子注入速率比值r _ b / r _ c 、粒子退出速率r _ o 、能級間的自發衰減速率r _ （ c - b ） 、 r _ （ a - b ）和非相干泵浦速率r對增益、色散和粒子數差的影響；第二節討論了驅動場和探測場的失諧對無粒子數反轉激光增益的影響。
  5. Optimal decay rate of a homogeneous euler - bernoulli beam with boundary control

    梁邊界控制的最優衰減率
  6. Global exponential stability of hopfield neural networks with time - varying delay and the estimation of decay rate

    神經網路的全局指數穩定性及衰減速度估計
  7. Most of the ice age spans a period of time for which no element has an appropriate decay rate

    冰川期的大部分期間都找不到具有合適衰變率的元素。
  8. We find the decay rate of 7be in be is smaller than that in au. the change of decay rate ( 0. 71 + 0. 32 ) %, indicates that the environment can indeed alter the decay rate, and the electronic affinity is not the only factor affecting the decay rate, so that one has to take the structure of the host materials into account in explaining the change of the decay rate

    本工作將反應p + 7li 7be + n產生的7be分別注入至預計電子親和勢相差較大的材料be和au中，測量7be在這兩種材料中的衰變率的變化，發現7be在be中的衰變率要小於在au中的衰變率，其相對變化為（ o
  9. Chapter 3 consider the initial - boundary value problem utt - where q is a bounded demain in rn with smooth boundary 3q ; with m ( s ) is a nonnegative c1 - function for s > 0 satisfying with we show that under certain conditions the solution blow up in finite time. chapter 4 consider the initial - boundary value problem and < ? > 2. we show the decay rate of the solutions of the equation

    第三章我們考慮了定義在具有光滑邊界的有界區域上的kirchhoff型方程初邊值問題其中0 ， r ， p 1 ， q 1 ， 1 ；當s 0時， m （ s ）是空間c ~ 1中的非負函數，且滿足其中， 0 ， 2這章我們給出了上述方程解的有限時刻爆破條件。
  10. Because of the continuous decay, the quantity of radioactive material and the rate of emission of radiation decrease steadily.

    由於連續衰變的結果，放射性物質的數量，輻射發射率都逐漸下降。
  11. This limited condition not only depends on the rabi frequencies of the coupling field and the signal field, but also depends on the detuning or the decay rate of the additional transition

    這個限制條件不但依賴禍合場和信號場拉比頻率，而且依賴于附加躍遷的失諧量或者衰減速率。
  12. In detail, one - photon detuning for large kerr nonlinearity and photon switching via eit should be far less than the product of the ratio of intensity of the coupling field to the intensity of the signal field, and the detuning or the decay rate of the additional transition

    具體來說，單光子失諧量的取值范圍應遠小於禍合場和信號場的強度比與微擾躍遷的失諧量或者衰減速率之積。
  13. Starting with the research on the characteristics of frequency spectra of the ip field as well as charging - discharging time and based on experiment results, the authors summed up frequency spectra, time spectra and decay rate characteristics of sulfide mineralized bodies ( chalcopyrite ) and graphite - bearing dolomitic marble, and detected new parameters for qualitative evaluation of ip anomalies

    摘要從研究激電場頻譜特徵及充、放電時間特徵出發，根據實驗觀測結果，總結了硫化物礦化體（黃銅礦）及含石墨白雲質大理巖等巖性的頻譜特徵及充放電時間特徵，探索到新的定性評價激電異常源參數頻率譜及時間譜、視衰減速度。
  14. The results proved the feasibility of this enrichment technique. the enriched nitrifying bacteria can directly store in a lucifugal condition for a long time, the nitrifiers decay at a rate of 0. 0138d - 1. but the decay rate of the nitrifiers stored in phosphate buffer ( ph 7. 2 ) is 0. 023d - 1

    硝化細菌富集培養后直接避光保存是一種較佳的保存方式，經3個月的保存其硝化細菌存活率為26 . 7 ，其比衰減率為0 . 0138d ~ （ - 1 ）硝化細菌。
  15. Compare with the rate of suffering decay tooth for the primary and high school students in the world, the rate of china is not that higher, but people gets decay tooth and doesn ' t replace it immediately, which is a serious problem

    與大城市孩子營養不良問題有相似之處，這種貧血不是沒有相應食物造成的，而與飲食習慣和營養知識缺乏有關
  16. It contains the problems of local existence of weak solutions, global existence and finite time blow - up of the first equation and decay rate of solutions of the second equation

    內容包括前者退化時的弱解的存在唯一性、解的整體存在性與衰減估計、非退化時解的有限時刻爆破和後者解的能量衰減。
  17. To the first equation, the banach contraction mapping theorem is used to show the local existence of the solutions, we use potintial well method to prove the global existence and the decay rate of the solutions, to the blow - up of the solution we use the energy method

    本文主要採用bananch壓縮映射原理來獲得解的局部存在性；採用勢井方法來獲得解的整體存在性和衰減估計；對解的爆破結論的證明主要採用能量方法；對解的能量衰減估計主要採用能量擾動方法。
  18. In chapter 1, the thesis studys the following cauthy problem to hyperbolic system with nonlinear relaxation term we prove that for the initial value with bounded c1 norm, there exists a unique global smooth solution for the cauthy problem ( 1 ), ( 2 ) ; in chapter 2, the thesis considers the following hyperbolic system with relaxation term and the sclar conservaton law equation when e is fixed, for a certain class of initial data, in the large time station, the thesis gets a determined lp ( p > 2 ) decay rate between the golbal smooth solutions of system ( 3 ) and the rarefaction waves solution of equation ( 4 )

    在第一章中，研究如下帶非線性鬆弛項的雙曲組的柯西問題證明了，對c ~ 1模有界的初值，柯西問題（ 1 ） ， （ 2 ）存在唯一的整體光滑解。在第二章中，考慮如下帶鬆弛項的雙曲組和單守恆律方程u _ t + f （ u ） _ x 0 ， （ x ， t ） r r ~ + 。 （ 4 ）當固定時，對一類初值，得到方程組（ 3 ）柯西問題的整體光滑解與方程（ 4 ）的稀疏波解間在大時間狀態下的l ~ p （ p 2 ）衰減率。
  19. There are three parts in this thesis : chapter 2 consider the initial - boundary value problem where q is a bounded demain in rn with smooth boundary < 3q ; with we show the local existence, the golbal existence and the decay rate of the solutions of that kirchhoff equation

    第二章我們考慮了定義在具有光滑邊界的有界區域上的kirchhoff型方程初邊值問題其中0 ， r ， p 1 ， q 1 ， 1 。這章給出了上述方程解的局部存在性、整體存在性和衰減估計。
  20. And, to the second equation, we use a so - called energy perturbation method to show decay rate of the solution

    Q ）給出了一類kirchhoff型方程非退化時解的有限時刻爆破和對有限時刻的估計。
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