特徵壽命 的英文怎麼說
中文拼音 [tèzhǐshòumìng]
特徵壽命
英文
characteristic life-
It can be seen from the results that the control beam had good plastic property in the static failure experiment after two million fatigue loading circles. all specimens with corroded main bars were failure under the fatigue loads within one million fatigue circles. fatigue lifespan of reinforced concrete beam was sharply shortened after main bars corroded in it and the beam was destroyed bristly without any prediction
試驗結果表明，振動測試不能夠對銹蝕鋼筋混凝土梁的疲勞破壞做出可靠的預測;對比梁在經過200萬次疲勞循環加載后的靜力試驗中仍表現出良好的延性破壞特徵;銹蝕梁在100萬次疲勞循環內均因主筋疲勞斷裂而破壞;主筋銹蝕使得梁的疲勞壽命急劇縮短;梁發生脆性破壞而沒有徵兆。For rotor steel ( 30crlmolv steel ), the tests of low - cycle fatigue property are done under different temperatures. the fatigue life under different temperatures is researched to make up for the defects of the testing for foreign similar materials. when pull - stretch data is attempted to evaluate low - cycle fatigue data, the result shows that four - point associated method in middle - low life zone is done well under room temperature, but there are large errors of four - point associated method and general - slope method under other temperatures
在本文中，通過與國外同類材料的性能進行比較，國產材料與國外材料共有的材料特徵基本相同；對轉子鋼（ 30crlmolv鋼）進行了不同溫度下的低周疲勞性能實驗，研究其在不同溫度下疲勞壽命，以彌補國外對同類鋼材測試的不足；採用拉伸數據預測低周疲勞壽命時發現，室溫條件下用四點關聯法在中低壽命區預測較好，在高溫條件下四點關聯法和通用斜率法都有較大誤差，需要進行改進。Most existing constitutive models do not take into account the interactions between different phases of pearlitic steel and cannot illustrate why such kind of materials has excerllent mechanical properties. it is, therefore, necessary to develop a new method, which can describe the macroscopic behavior, damage and failure of the materials and their micro structural dependence. in this paper, based on a non - classical theory of plasticity and the continuum damage mechanics, a damage evolution based on an ellipsoidal void model for mixed hardening materials is obtained
已有的關于珠光體鋼的本構模型多難以考慮珠光體材料的微結構及其相互作用，難以解釋珠光體材料何以具有較好的綜合力學性能，因此有必要發展一種多層次的細觀力學分析方法以研究此材料在復雜加載條件下計及微結構特徵的宏觀響應特性，使材料的強度、疲勞壽命的預測與其微結構及各組成相的損傷及微觀應力應變演化規律聯系起來，進而為材料微結構的設計提供依據。The dependable theory regards the life - span characteristic of products as the main research object. usually, we describe the life - span of products with the extraneous variable which is nonnegative
可靠性理論以產品的壽命特徵為主要研究對象，通常用一個非負隨機變量來描述產品的壽命。The principal environmental characteristic of concern for pfcs is that they have long atmospheric lifetimes and high global warming potentials
我們最關注全氟化碳的重要環境特徵是它們有較長的大氣壽命和很高的導致全球變暖的潛力。This is a group of astringent, organic compounds derived from grape skins, stems and pips that dissolve into wine during fermentation and imbue it with depth, character and increased longevity
這種有機物來自葡萄皮、梗和籽實，在發酵過程中溶解，它使葡萄酒有內涵、特徵和壽命。In brand life perspective, brand is a life system that grows and changes continuously ; its growth and development have its own rules and characteristics
從品牌壽命的角度出發，品牌是一個不斷的成長變化的生命系統，品牌成長與發展有其自身規律與特徵。Effect on the characteristics of fatigue life of composite soils and dynamic modulus were discussed. the deformation behavior of stabilized soil on static and dynamic loading were compared. the characteristics of frequency spectrum of composite soils were analyzed in the thesis
對水泥?水玻璃加固土進行循環荷載下的疲勞試驗研究，分析水泥?水玻璃加固土的疲勞壽命及其影響因素，以及固結土的動模量特徵，並對水泥土在動、靜荷載作用下的變形特徵進行比較，分析對比不同振幅與頻率的動荷載作用下的水泥加固土的應變響應及其頻譜特性。In this analysis procedure, the mean stress is accounted for by obtaining the equivalent stress derived from goodman formula or not and the difference between the two cases are discussed
由於在譜分析方法中考慮到了由波高、特徵周期及浪向確定的不同海況，所以本文也分析了各海況對疲勞壽命的影響。From some characteristics observed, such as the short lift time, narrow frequency band, fast frequency drift, quasi - periodic pulsation, spike event and complex magnetic structure, it is considered that the radiation mechanism of these events may be principally due to the electromagnetic waves magnified directly by the instable electronic cyclotron
從它們的觀測特徵：短壽命，窄頻帶，頻率快速漂移，及尖峰事件與磁結構復雜的大黑子活動區密切相關等，認為這些事件的輻射機制可能是電子迴旋脈澤不穩定直接放大電磁波所致。Two integrally cast lugs on the disc prevent the disc from spinning in service. this exclusive feature helps extend valve life in difficult services by eliminating disc spinning
閥瓣上的兩個整體鑄造的耳柄防止閥瓣在運行期間出現旋轉現象。這個獨特的特徵通過消除閥瓣在嚴酷的應用中出現旋轉的現象，來幫助延長閥門的使用壽命。With the acceleration of extinction of species, biodiversity conservation is extensively concerned. the extinction of species is concerned with the degree of threat by biotic and abiotic factors. so, taking action to preserve plant species is very necessary and paramount before their extinction. one of the most effective biological techniques to conserve the biodiversity is the establishment of genebanks, i. e. ex situ conservation. the elucidation of various factors that regulate seed viability and vigor in storage is essential. an ideal condition to prolong the longevity is mainly depended on seed water content, temperature, humidity and types of containers used during storage. the optimum stage of seed maturity, harvesting techniques and processing, in addition to physiological features such as degree of dormancy, also play key roles in seed storage. certainly, desiccated seeds deteriorate with time even under extremely good genebanking conditions. according to seed storage behavior, it is necessary to consider three principal factors : storage environment, storage duration and plant species which will affect seed survival under good genebanking conditions. the present review is an attempt to discuss the importance of the aforementioned aspects of seeds in detail in order to conserve plant germplasms ( especially wild rare and endangered plants ) for ex situ conservation through seed - gene bank
一個物種的滅絕是與其受生物因子和非生物因子的威脅程度相關的.隨著物種的加速絕滅，保護生物多樣性受到廣泛地關注.保護生物多樣性的最有效的生物技術之一是建立種子基因庫，進行遷地保護.種子庫理想的貯藏條件主要取決于種子含水量、貯藏環境（如溫度和濕度）和貯存種子的容器.進行種子貯藏，了解種子生命力和活力的影響因子的作用機理是十分重要和必要的.除了種子自身的生理特徵外，種子的貯藏壽命與種子成熟度、收獲技術、加工處理方法也是息息相關的.即使在最適的庫存條件下，種子也會隨時間發生劣變.因此，必須根據種子特定的貯藏行為，加以考慮影響種子存活的3個主要方面（貯藏環境、貯藏期和植物種類）而選擇有效的貯藏方案.本文試圖討論種子貯藏生理的幾個重要方面及其需解決的技術問題，以便更好地通過種子基因庫，長期有效地保存植物種質資源The count of failure includes that of failure classification and failure pattern ; reliability indicator includes mean time to first failure ( mttff ) and mean time between failure ( mtbf ) ; life indicator includes feature life, center life, and specified life
其中，故障統計包括故障類別的統計和故障模式的統計；可靠性指標包括平均首次故障里程mttff和平均故障間隔里程mtbf ；壽命指標包括特徵壽命、中位壽命、額定壽命等。Two new methods have been put forward to estimate the reliability characteristic parameter. a software package has been developed to process the data obtained from reliability testing for electric apparatus. it consists of both the determination of failure distribution and the estimation of reliability characteristic parameter
最後，設計出電器可靠性試驗數據處理軟體包，此軟體包含了產品失效分佈類型的確定和可靠性試驗結果為大子樣、小子樣、無失效數據時可靠性特徵量的估計方法，以及恆定應力加速壽命試驗數據下的可靠性特徵量的估計方法。By doing this, the writer try to inform industrial policy makers of cluster ' s living mechanism and provide them with an analysis mode. this article conclude seven chapters, the first and second chapter give a brief review of industrial cluster theories, the third chapter analyze how a cluster appear, the fourth chapter analyze industrial cluster ' s drives and action mechanism, the fifth chapter research industrial cluster ' s growing pattern and reasons, the sixth chapter give some advices on how to accelerate cluster ' s growing and on how to maintain a cluster ' s vital. the last chapter reveal problems faced by industrial clusters in china and put forward some advices
本文共分六章，第一章首先對產業群的概念進行界定並簡述產業群的特徵，接著對產業集聚機理的相關理論做了簡單回顧；第二章對產業群的形成條件和萌芽動因進行了分析；第三章重點研究產業群成長的動力機制；第四章對產業群壽命周期各階段的生長特點及其動因進行了分析；第五章是在前幾章對產業群形成機制研究的基礎上得出的幾點啟示；第六章利用本文建立的分析框架對我國三類典型產業群當前面臨的動力問題進行了分析並提出了相應的對策建議。Specimens ’ cracking load under dead - load, fatigue failure characteristic, fatigue life, deflection of span - centre, fatigue flexural rigidity, maximal crack width, development of cracks and strain of concrete and steel bars have been investigated. the influence of fatigue cycle characteristic, ratio of reinforcement, kinds of aggregate and concrete compressive strength on the specimens ’ fatigue behavior has been also investigated
對試件的靜載下開裂荷載、疲勞破壞特徵、疲勞壽命、疲勞荷載作用下的跨中撓度、截面疲勞抗彎剛度、裂縫開展情況及最大裂縫寬度、鋼筋及混凝土在循環荷載作用下應變等內容進行了研究，分析了疲勞循環特徵值、縱筋配筋率、骨料種類、混凝土抗壓強度等因素對試件疲勞性能的影響。The aeronautic weapon project is a kind of special project. it has characteristics of hi - technology, high investment, high risk, and long cycle etc. generally total lifecycle of aeronautic weapon embraces project demonstration, project design, project development, design conformation and production conformation stage, there are a large number of risks during each stage, the quality of aeronautic weapon project risk management directly influences the result of the aeronautic weapon project. how to identify every risk and analyze the influence of risk factors in different stage directly affects the result of risk management
航空武器裝備項目是一種特殊項目，它具有高科技、高投入、高風險、長周期等特徵，一般地，航空武器裝備全壽命周期包括項目論證、方案設計、工程研製、設計定型和生產定型階段，在每個階段里都存在著大量的風險，對航空武器裝備項目風險管理的好壞直接影響著航空武器裝備項目的成敗，而如何準確識別各階段面臨的風險以及分析不同階段各風險因素的影響程度直接影響著風險管理的效果。After briefly describing the damage mechanism of electromigration, noises theories and signal processing methods, many kinds of experimental assessing methods of electromigration, such as the traditional mtf test, the test of changes of resistance and noise measurement, etc., are reviewed in this paper, and its research on the technology of noises detection has been studied emphatically
本論文在簡要介紹電遷移失效機理、噪聲理論和1 / f信號表徵方法的基礎上，對各種電遷移可靠性實驗評估方法（傳統的壽命測試法、電阻變化測量法、噪聲測量法）的特點作了分析對比。重點研究了vlsi金屬互連電遷移噪聲檢測技術。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。Moreover, the data processing method of accelerated life test is used to solve the problem of the reliability data conversion under different operating status to liquid rocket engine. and the counter power law model is introduced as the relation model between the characteristic life and the combustion chamber pressure, the accelerated life equation of the constant stress accelerated life test for the weibull distribution is obtained, through the accelerated life equation, the reliability estimate of different combustion chamber pressure is calculated
再次，採用加速壽命試驗的數據處理方法對液體火箭發動機不同工況下可靠性數據折算的問題進行了研究，引入逆冪律模型作為特徵壽命與燃燒室壓力之間的關系模型，得到了weibull分佈下恆定應力加速試驗的加速壽命方程，並通過加速壽命方程折算出不同室壓下的可靠度估計。分享友人