壽命指數 的英文怎麼說

中文拼音 [shòumìngzhǐshǔ]
壽命指數 英文
life exponent
  • 指 : 指構詞成分。
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 指數 : 1. [經] （比數） index number; index 2. [數學] exponent
  1. It is easy to show, for an exponential decay, that the uncertainty in the life time is also z.

    很容易證明，對于指數衰減來說，壽命的不確定性也是z。
  2. In chapter3, we discuss the multiplicate progressive stresses accelerated life test. under the weibull distribution and an invers power law model we first present a necessary and sufficient condition for the existence and uniqueness of mle for the exponential distribution, then give estimators and confidence intervals of the parameters based on the blue. finally, we study them by using monte - carlo simulation

    第三章首先指出了一組序進應力加速壽命試驗下weibull分佈分佈參數的mle不唯一，然後給出了p組序進應力加速壽命試驗下指數分佈的mle存在和唯一的一個充要條件，並用隨機模擬的方法研究比較了參數估計的優良性，最後給出了p組序進應力加速壽命試驗下weibull分佈中參數的點估計和區間估計，討論了有關問題，給出模擬實例。
  3. Moment estimation of the progressive stress accelerated life testing under exponential distribution censored samples

    指數分佈場合下序時應力加速壽命試驗的矩估計
  4. The design and analysis of vertical pnp transistor was accomplished through the relationship between carriers lifetime of epitaxy layer and current gain, rate of surface combination and leakage current, carriers lifetime of epitaxy layer and switch speed

    從外延層載流子壽命與晶體管放大倍數，表面復合率與漏電流，以及外延層載流子壽命與晶體管開關速度等方面對于輸出級縱向pnp管進行了較為詳細的設計與分析，達到了電路中對輸出級縱向pnp管主要參數指標的要求。
  5. It is just because there are something wrong in the management strategy in many chinese mid - min enterprises, the average life of chinese mid - min enterprise is about 10 years. few enterprises can sustain 100 years

    中國中小企業正是由於戰略管理不到位，成長戰略方向失誤，才出現企業普遍壽命較短，百年老企業屈指可數，企業平均壽命不到10年這一現象。
  6. Then, probability prediction model of durable life is founded. through discussing the probability characteristics of influencing factors, the law of durable reliability is analyzed, and the prediction method is validated by the experimental data

    建立了基於規定可靠指標的混凝土耐久壽命的隨機預測模型，通過探討影響因素的概率分佈，分析了耐久可靠性的發展規律，運用工程實際檢測數據對本文提出的耐久壽命方法進行了驗證。
  7. Based on the current research achievements on durability under chloride environment, probability theory, structural reliability theory, concrete structures theory, neural network theory and structure dynamic theory are employed comprehensively in this dissertation. some problems of durability of reinforced concrete structures under chloride environment were studied through the exploitation of experimental data, the rule of chloride ingress and steel bar corrosion, the performance of corroded member, and residual life prediction. the main issues and results in this dissertation are as follows : 1 、 the probability method for the prediction of durable life based on the stipulated reliability index for concrete structures under chloride environment is presented in this dissertation

    本論文在國內外對氯離子侵蝕環境下混凝土結構耐久性研究成果的基礎上，綜合運用概率理論、結構可靠性理論、混凝土結構理論、神經網路理論、結構動力學理論等基本理論和方法，結合實際檢測數據，按照氯離子侵蝕、鋼筋銹蝕、銹蝕構件性能、銹蝕構件壽命預測的思路對氯離子侵蝕環境下鋼筋混凝土結構耐久壽命預測的有關問題進行了深入系統地研究，完成以下主要研究工作並取得相應成果: 1 、提出了氯離子侵蝕下基於規定可靠指標的混凝土結構耐久壽命的概率計算方法。
  8. Its applications include in the fields of information engineering, electronics industry, theory of controls and economic, etc. for example, we use geometric distribution to describe the life distribution of runs of a species in transect surveys of plant populations and inventory demand distributions. in the theory of reliability, geometric distribution is one of the most important discrete probability distributions because of its loss of memory

    在可靠性理論中，由於幾何分佈的無記憶性，使得其是離散型壽命分佈中最為重要的壽命分佈之一，其相當于指數分佈在連續型壽命分佈中的地位，這正如程侃研究員在文獻[ 5 ]中所指出的「在離散壽命的情形，幾何分佈起著連續情形下指數分佈所起的作用」一樣。
  9. Guide for the statistical analysis of thermal life test data

    熱壽命測試數據統計分析指南
  10. During the course of the life estimation, if the experimental parameters can be carefully chosen, aircraft structure life estimation has a positive effect on the structure fatigue des ign

    在壽命估算過程中，只要比較精確地選取各方法所需的經驗參數，飛機結構所估算的最終結果對飛機結構抗疲勞設計和型號定壽有很大的指導意義。
  11. And my well column in science times last month pointed out that there ' s no data to show that statins prolong the lives of many people who use them

    並且《科學時代》中我的健康專欄指出：沒有數據顯示他汀類藥物延長使用者的壽命。
  12. The life expectancy at birth, the press criticism index, the index of current economic conditions and the public expenditure on education as a proportion of the gdp were higher in 2004

    出生時平均預期壽命、報紙批評指數、經濟現況指數及教育的公共開支占本地生產總值的百分比均比前一年上升。
  13. Expectancy of life at birth, age participation rate for first - degree programmes and post - graduate programmes in local universities and index of current economic conditions were higher in 2003

    而出生時平均預期壽命、教資會資助學院的第一年學士學位及研究院課程的適齡學生入讀率及香港的經濟現況指數，則較二零零二年上升。
  14. The endurance function of the insulation field is widely concerned in the power system. according to the equality between the two dimensional weibull distribution and the law of electrical aging, after the method for estimation of the voltage endurance coefficient is presented by the maximum likelihood estimation and the minimum square estimation of the two dimensional weibull distribution parameters, on the basis of the analysis of the test disadvantages under invariable voltage, the method of obtaining the voltage endurance coefficient under the intension increased by degrees is considered

    電氣絕緣電老化性能是電力系統普遍關注的問題，由於二元weibull分佈與電老化定律在評價絕緣老化特性上存在等價性，本文首先介紹了二元weibull分佈參數採用極大似然法和最小二乘法估計獲得電壓壽命指數的方法，同時在分析其在恆定電壓下試驗容易出現，由於電壓選擇不當導致試驗時間過長現象的基礎上，討論了利用場強遞增方式確定電壓壽命指數的方法。
  15. Hereafter being the forecasting to the old age population coefficient, this text has been applied two kinds of regression model, namely univariate linear model and logarithmic model, and thought over three kinds of economic speed of development ( high, middle, low ) in the logarithmic model to forecast the old age population coefficient respectively. finally, by analyzing the forecasted value and the inertia law of population development, the paper points out the lengthening of the population equally expected life span will push forward the aging of population step by step to the advanced age development ; the development trend of the population aging continues to be clear, and just appears a stage characteristic ; furthermore, the population aging speed in rural area will be faster than in the city

    此後是對老年人口系數的預測，本文應用了兩種回歸模型，即一元線性回歸模型和對數擬合模型，並在對數擬合模型中考慮了經濟發展速度的高、中、低三種方案，對老年人口系數分別進行預測；最後在分析預測值和人口發展慣性規律基礎上對山東省未來人口老齡化發展趨勢作了較深入分析，指出人口平均預期壽命的不斷延長，將逐步推動人口老齡化向高齡化發展；人口老齡化繼續發展趨勢明顯，且呈現出階段性特徵；農村人口老齡化速度將快于城市。
  16. Factors influencing service life of nc punch die have been analysed with emphasis on important role of proper use and maintenance on life and substantial guiding for operation

    摘要分析了影響數控沖床模具使用壽命的因素，重點闡述了正確的使用與維護保養對模具壽命的重要作用，給出了模具使用及保養的具體操作指導。
  17. The minimum square method was used in regressing analysis for the result of treatment in a supposed distribution function, the " d " examination method was used for weibull distribution and index distribution, and obtained the distribution type in the life of the main shaft bearings, appraised the reliability life, the mean life and the reliability in 500hours of the main shaft bearings with theoretical distribution function

    用殘存比率法、平均故障法和累積故障法對主軸軸承可靠壽命進行了評估，用最小二乘法對現場數據統計處理結果進行了假設分佈的回歸分析，並用d檢驗法對威布爾分佈和指數分佈進行了分佈檢驗，得出主軸軸承壽命分佈類型。利用理論分佈函數，對主軸軸承可靠壽命、平均壽命、 500小時的可靠度進行了評估。
  18. The article takes the whole - life experimentation of the gear for example, points out that the sustainable development of whole - life design must base on the study of few sampling, and brings forward two kinds of strategies of the study on the few sampling : the study on the numerical simulations and the study on the virtual prototype technology

    摘要以齒輪全壽命試驗為例，指出全壽命設計可持續發展必須依賴于小子樣系統研究，並提出小子樣系統的2種研究策略，即數值模擬研究和虛擬樣機研究。
  19. Abstract : analyzed the demands of capacitor specific parameters in modernpst, emphatically discussed specific parameters demands of filter capacitor and absorber capacitor. pointed to take care of voltage rating and conditions of life test in use

    摘要：分析現代電源技術的發展對電容器特殊參數的要求，著重討論濾波電容器、吸收電容器，指出在使用時應注意額定電壓與壽命試驗的條件。
  20. " morbid obesity " is referring to patients with body weight doubling the ideal body weight or bmi exceeding 40. the life expectancy of these patients will be severely affected by their obese - related diseases and their mortality rate is twice that of the healthy people

    如果體重超過理想體重一倍或身體體積指數大於40 ，達到所謂病態肥胖（ morbidobesity ）時，更會因上述疾病而影響到肥胖者的壽命，其死亡率為正常人兩倍以上。
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