超現值指數 的英文怎麼說

中文拼音 [chāoxiànzhízhǐshǔ]
超現值指數 英文
epvi excess present value index
  • 超 : Ⅰ動詞1 （越過; 高出） exceed; surpass; overtake 2 （在某個范圍以外; 不受限制） transcend; go beyo...
  • 現 : Ⅰ名詞1 （現在; 此刻） present; now; current; existing 2 （現款） cash; ready money Ⅱ副詞（臨時; ...
  • 指 : 指構詞成分。
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 現值 : present value; current value; present worth
  • 指數 : 1. [經] （比數） index number; index 2. [數學] exponent
  1. In the chapter two we discussed that the server would first use speed - 1 to serve customers when the system entered the busy state from the empty state, but when the server found the number of customers in the system exceeded the thresh - n during serving, after finishing the service of current customer it would use speed - 2 to serve the next customer till there is no customer. by the method of supplementary variable, l - transition and constructing vector markov, we attained the distribution of the queue length, the distribution of wait - time, the distribution of stay - time, the utility and etc. in the last part of this chapter, we discussed the optimal n * for thresh n which minimizing the cost function and we illustrate the cost function behaves for various parameter selections by a numerical study

    在本文第二章討論了當系統從空閑進入忙期時是服務臺以速度1進行服務，但一旦對某顧客服務完畢時如發現系統中的顧客數超過n值時就以速度2服務后續顧客直到系統變空的可修排隊系統，通過構造各種向量馬氏過程和吸收向量馬氏過程，獲得了瞬態、穩態隊長分佈、等待時間分佈、逗留時間分佈、更新周期分佈等一系列排隊指標以及可用度、可靠度等一些可靠性指標，在本章最後又從系統如何更好節省費用角度出發討論了門限n的最優取值問題，並利用mathematic軟體對費用函數進行了數值模擬。
  2. Meanwhile, the study also shows that the diversity of studied cave animals is inversely proportional to human population density and water quality ; and bio - diversity, to some extent, is proportional to soil fertility and amount of chemical fertilizer, but inversely when excessive ; the correlativity between bio - diversity and vegetation cover rate is not obvious, when ground vegetation is strongly interfered by human being ; the amount of diestrammena marmorata is proportional to the d iversity of plant, and inversely proportional to soil fertility, and in a way, to water quality ; and the correlativity between community and water quality and soil fertility, and between water quality and the amount of mosquito and fly, is not as good as expected. the author points out that diestrammena marmorata, bat, mosquito, fly, oreolalaxrhohostig metus ( or cudata ), and fish can be chosen as in

    同時，研究還表明：調查洞穴的物種多樣性與人口密度、水質成負相關；在一定范圍內，物種多樣性與化肥施用量、土壤肥力成正相關，超過一定的值則成負相關;在人類對地表植被的高強度作用下，物種多樣性與植被覆蓋率的相關性不明顯;蚊蠅數量與土壤肥力基本上呈正相關;斑灶馬數量與植物種數呈正相關，斑灶馬數量與在一定水質范圍內與水質呈負相關，與土壤肥力呈負相關;群落數與水質和土壤肥力、蚊蠅數量與水質都不能表現較好的相關性;研究認為，可以選擇斑灶馬、蝙蝠、蚊蠅、紅點囊蟾（或有尾類） 、魚類等作為指示動物對洞穴環境進行監測。
  3. In the chapter 4, we make an extension to the model of the chapter - 2. the service speed change is instant, that is say, during the service using speed - 1 to serve, if the number exceeds the threshold n, then the server should immediately use speed - 2 not speed - 1 to serve current customer and the next till entered the empty state. we especially point out that the classical m / g / 1 queuing model and the m / g / 1 queuing with n - policy are the particular cases of model discussed in chapter - 4

    第四章對第二章討論的模型進行了進一步的擴展，其服務速度1到速度2的轉移規則是瞬間轉移，也即當服務臺以速度1服務顧客的過程中如發現系統中的顧客數已超過門限n值時就即刻調整為以速度2服務當前顧客和后續顧客直到系統變空的可修m g （ m g ） 1排隊系統，並指出經典的m g 1和具有n -策略的m g 1排隊是本章研究的兩種特例。
  4. For both newtonian flow and non - newtonian flow, the vortices are generated when the waviness of the bottom profile is beyond a critical number. by increasing the waviness, a second vortex can be generated. with the increasing of reynolds number, the symmetry of the streamlines at re = 0 is destroyed and the vortices are sloped and become larger

    當波形板的波動度超出臨界值，波形板壁面上的流動出現流線分離，流動中有渦生成;增大波動度，流動中出現第二個渦; re = 0 ，流線在流場中對稱分佈;雷諾數增大，流線駐點在水平方向出現位置偏移，渦的范圍增大;對于非牛頓流體，隨著剪切變稀指數的減小，渦的作用范圍減小。
  5. The best dosage of dispersant and disperse medium, and the best time of ultrasonic disperse. secondly, the bp neural network process parameters model which describes the relationship between the important process parameters of the preparation of superfine quartz powder and the important evaluate guidelines was built, based on experimentation data. the forecast of the important guidelines was achieved with this model

    其次，本文以試驗數據為基礎，基於bp神經網路建立了球磨法制備超細石英粉體的關鍵工藝參數（轉速，時間，裝樣率，料球比）與粉體的關鍵評價指標（中值粒徑，粗端粒徑，均勻性系數）之間多目標多變量的bp網路工藝參數模型，該模型的建立實現了粉石英制備的關鍵指標預測。
  6. In this work, after giving the selective method of the time window width and the minimum time window width required for corrected calculations of optical pulse propagation in fibers, the shapes of various incident pulses after passing through different fiber lengths have been simulated by selecting different time window widths

    在此基礎上，對不同的光脈沖在光纖中的傳輸進行了數值模擬，發現前人得出的超高斯光脈沖在光纖中傳輸會由於色散而產生脈沖形狀扭曲這一結論是錯誤的，並指出了錯誤的原因所在。
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