a-coefficient 中文意思是什麼

a-coefficient 解釋
自發發射系數
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  • coefficient : adj. 共同作用的。n. 1. 共同作用；協同因素。2. 【數，物】系數，率；程度。
  1. 2 the theoretical values of the second virial coefficient are precisely fitted into some simple expressions. according to one of them, a new temperature function for the quadratic terms in cubic equations was derived : the function is simple, general, without acentric factor, truly predictive, theoretically sound, and applicable to all the van der waals - type equations

    2將第二維里系數的理論值較精確地擬合為幾種簡單的表達式，並據此導出了立方型狀態方程中二次項溫度函數的新形式該式簡單、通用，不含偏心因子，具有真正的預測功能和堅實的理論基礎，原則上適用於所有vanderwaals型方程。
  2. A method to calculate quantitatively the adsorption volume or adsorption space of per mass of adsorbent derived from both the adsorbed molecule volume and the maximum adsorbance of a solute in an adsorption isotherm under a given experimential condition is presented firstly for a solid / liquid adsorption system of the solute in a dilute aqueous solution. this method is suitable for not only mono - layer adsorption, but also mani - layer adsorption and micelle adsorpion of surfactant constructed by hydrophile and lipophile groups. therefore, the surface concentration of the adsorbate, cs, deduced from the adsorption volume is possessed of the meaning of true concentration, and the value of the patition coefficient of the adsorbate between solid and liquid phass, p, attained by the cs and the c, solution concentration of the adsorbate, can be accurate. the foregoing a set of calculations are presented for the solid - liquid adsorption systems consisted of the wool fiber and separately dodecyltrimethyl - ammonium bromide ( dtab ) and hexadecyltrimethyl - ammonium bromide ( ctab ) in this paper. this provides a strong basis for adsorption thermodynamic investigation of adsorbate

    對稀溶液中溶質的固/液吸附體系，首次提出了根據吸附分子體積和實驗條件下吸附等溫線中的最大吸附量計算單位質量吸附劑的吸附體積或吸附空間的方法.此法適用於單層吸附，也適用於多層吸附和具有親水親油結構的表面活性劑分子的膠團吸附.由此，吸附質的表面相濃度cs具有真實濃度的含義，相應地，計算得到的溶質的固/液分配系數p就有了準確值.分別計算由溴代十二烷基三甲銨（ dtab ）和溴代十六烷基三甲銨（ ctab ）與羊毛纖維構成的液/固體系分配系數等，為溶質吸附的熱力學研究奠定了基礎
  3. A variety of methods including the tabular comparison of data, the tabular comparison of similarity coefficient, the nearest neighbor method and the group - average method of hierarchical agglomerative classification were applied to investigate the forest communities in meizi lake area

    森林植被樣地中以喬木層樹種的重要值為指標，採用紙條排隊法、群落相似系數分類法、最近鄰體法、組平均法對梅子湖森林植被樣地進行數量分類。
  4. A test analysis of open canal bottom coefficient of roughness anticlimax on turbulent velocity of flow and intensity of turbulence influence

    明渠渠底糙率突減對紊流流速及紊動強度影響的試驗分析
  5. It was suggested that eric - pcr could substitute for rapd in research related to the genetic identification and genetic diversity in auricularia and other edible and medicinal fungi : 2 to a certain extent, genetic differences among auricularia strains tested in this study did not have necessary relativity with their geographical origins respectively ; 3 in this study, genetic diversity in a. polytricha was higher than that in a. auricula : 4 in this study, a. fuscosuccinea had a higher homology to a. auricula than to a. polytricha ; 5 morphological characteristics validated the results from eric - pcr and provided a potential explanation for the higher similarity coefficient between a. auricular and a. fuscosuccinea ; 6 southern hybridization was employed by choosing a strain from a. auricula as a probe which hybridized with a. auricula and a. fuscosuccinea except a. polytricha, further confirming the veracity of the results from eric - pcr ; 7 in this study, isozyme analysis could not cluster the 7 strains from three auricularia species to different groups efficiently ; 8 2 strains from two auricularia species revealed high conservative degree and the restriction fragment patterns by 4 kinds of restricted enzymes showed no diversity

    本研究中，木耳屬2個種的2個菌株在its區域表現出較高的保守性， 4種限制型內切酶的酶切圖譜沒有顯示出多態性；增加內切酶種類及供試菌株數量，有可能獲得具有多態性的限制性內切酶酶切圖譜； 9本實驗中， its區域的真菌特異性引物與真核生物通用引物對于擴增效果無較大差異，擴增片段長度均為650bp左右； 10根據形態學實驗、 eric - pcr實驗以及southern雜交實驗的結果分析，紫木木耳屬種質資源的遺傳鑒定和遺傳多樣性評價耳極有可能是毛木耳種的一個變種; n .本研究中所用的gutc法是一種適用於木耳屬菌株基因組洲a快速提取的方法; 12 .傳統的形態學分類法和現代的分子生物學分類法，兩者的關系是相輔相成，互為驗證
  6. The results are as following : 1 eric - pcr was for the first time applied in differentiating strains from edible fungi and proved to be more rapid and reliable than rapd in auricularia identification study. taken the similarity coefficient as 75 %, 29 strains of three auricularia species were grouped into 6 and 9 clusters by rapd and eric, respectively. eric - pcr clearly distinguished a. auricula from a. polytricha while rapd failed

    在75的分類水平上， eric - pcr把29個菌株分為9組，黑木耳種和毛木耳種可以明顯區分開；而rapd只能分為6組，不能將黑木耳和毛木耳分開，說明eric - pcr是比rapd更快捷可靠的分子標記，可以有效用於木耳屬的種質資源及遺傳分類的研究，也適合於其它食藥用菌種質資源的研究； 2
  7. Pascal published a treatise on binomial coefficient.

    帕斯克發表了關於二項系數的論文。
  8. ( 5 ) it was more precise for using darcy - weisbach formula to calculate the hydraulic pressure slope curve in the lateral line, but too complexity. although i - pm wu formula is simple, the estimated results were not agreement with the measured data. a coefficient including irrigation uniformity was presented to modify i - pal wu formula, and the results were agreement after using the coefficient

    （ 4 ）利用達西?韋斯巴赫公式計算微孔毛管的沿程水頭損失具有較高的精度，但計算復雜，吳義伯公式計算雖較簡單，但在灌水均勻度較差時誤差較大，為此對吳義伯公式進行了修正，提出了修正系數的計算經驗公式，取得了良好的結果，為簡易地下滴灌工程設計中水力計算建立了簡化公式。
  9. The characteristic and essentiality of structural damage alarming are discussed. a method which applied two different wavelet bases to decompose and recompose measure signals is proposed to detect structural damage. by a coefficient of damage alarming which is defined as k and a threshold which is specified as u, information of emergence and damage time are obtained

    探討了結構損傷預警的特點和重要性，提出了一種應用兩種小波進行分解和重構的損傷預警方法，並定義了一個多尺度信號損傷奇異點搜尋的指標_ k ，以預警指標閾值能有效識別結構是否發生損傷。
  10. Who calculating the condensing heat transfer, the algorithm uses the nusselt w. method and used a coefficient of correction. by this coefficient the contradiction between the actual condition and the assume condition of nusselt is solved

    為此，演算法在計算凝結換熱時採用nusseltw .方法並加入了修正系數，解決了復雜且變化的實際工況與nussen所假設的條件不完全相符的矛盾。
  11. A coefficient and split - half reliability coefficient of this scale reach into 0. 8774 and 0. 8286. at last, the author measured 450 criminals with it

    該量表的a系數和分半信度系數分別達到0 . 8774和0 . 8286 。
  12. Test - retest reliability, split - half reliability, internal concordance coefficient ( cronbach a coefficient ), content validity, construct validity and index validity of the mental self - supporting questionnaire of university students were good

    對自編的《大學生心理自立問卷》進行了盡可能多角度、多指標的信效度檢測。
  13. Split - half coefficient and internal concordance coefficient ( cronbach a coefficient ) were used to test reliability of the questionnaire. coefficient of all the factors was significant that shows the questionnaire has good internal concordance and high split - half reliability

    （ 2 ）本研究用分半信度和內部一致性系數（ cronbacha系數）檢驗問卷的信度，信度系數均達到顯著水平，說明中學校風問卷具有較好的信度。
  14. In most cases in which a coefficient has been calculated the experimental situation was remote from practical processing conditions.

    大多情況是，計算摩擦系數的試驗條件與實際生產加工條件間，存在有很大的差別。
  15. A coefficient of 0. 9 can be multiplied to ensure the safety of structures. by and large, the back covered porous brick wall with constructional column and gird beam has the same shearing strength under low circulated load as other porous brick wall, so the shear resistance and aseismatic capability can be calculated by the standard method. the experiment indicates that the back covered porous brick wall has good energy absorbing as well as deforming capability, and it can satisfy the requirement of aseismatic structures

    盲孔多孔磚砌體的通縫抗剪強度略低於規范計算值，為保證結構安全，建議設計時乘以系數0 . 9 ；盲孔多孔磚墻片在低周反復荷載作用下抗剪承載力與其它多孔磚墻片基本相當，可按規范方法計算其抗震抗剪承載力；試驗證明帶構造柱及圈樑的盲孔多孔磚墻片有較好的吸能、變形能力，可以滿足抗震結構的要求。
  16. Different like classical pca, which objects at minimizing the reconstruction error and treats equally each feature, the weighted pca associates each feature with a coefficient according to its role in the recognition task and minimizes the weighted reconstruction error. then classify new samples by calculating the point from weighted subspace distance for classification

    與傳統主元分析不同，加權主元分析根據特徵的分類能力進行加權，通過最小化加權重建誤差來尋找加權子空間，並利用點到加權子空間的距離進行分類。
  17. 3 ) when computing the resultant force of each interior spring point, farc andffairare multiplied by a coefficient k. thus, abnormal case will be avoided. 4 ) smoothing between patches is performed

    通過對經過至少兩次catmull - clark子剖分后的網格應用pccm演算法，它生成了大片、光滑拼接的雙三次b樣條曲面。
  18. Some researches have been done as follows : 1. in the study of percolation model, a coefficient, which is used to describe " conduction " rule, is defined

    重整化群方法處理滲流模型時， 「導通」規則的選取至關重要，我們定義一個描述「導通」規則的系數（簡稱規則系數） 。
  19. If your product has the following specification : glass with a coefficient of inferior or equal linear expansion to 5 xs 10 - 6 by kelvin, between 0 degrees and 300 degrees celsius

    客戶問我我們的玻璃有沒有以下的規格，好象跟耐熱有關，可是具體的我也不懂，大家幫忙看一下什麼意思好嗎
  20. Since 3d - pcw tackles the coefficients as a whole, the context of a coefficient is computed only once, and the coefficient is encoded only once. but in 3d - escot the context has to be computed once and the coefficent has to be encoded once on every bit plane. therefore, 3d - pcw has much lower time complexity than 3d - escot

    由於3d - pcw把系數作為一個整體進行編碼，每個系數只需要計算一次上下文，並編碼一次，而ebcot的擴展3d - escot每個系數在每個平面上都需要計算一次上下文並編碼一次，因而3d - pcw比3d - escot演算法的時間復雜度更低。
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