economic span 中文意思是什麼
economic span
解釋
經濟跨度-
The studies of this paper is a beneficial porker to the cable - stayed bridges with long span, which will bring about a good social or economic benefit
本課題研究與實橋應用，對大跨度斜拉橋施工監測監控做出了有益的探索，取得了較好的社會經濟效益。 -
Rubber tree ( hevea brasiliensis ) is an important economic woody - crop in tropical areas. its latex is the unique source of crude rubber used in current industry. because of its special and important use, the rubber tree has been extensively planted in tropical areas. increase production is always the main target in rubber tree cultivation. since the ethrel was applied in increasing latex production in 1968 for the first time as a chemical stimulant, not only the latex production had been increased largely, but also a new set of rubber tapping system had been established, leading to a series of economic benefit. owing to ethrel " s extensive application, its side effects had been found more and more obviously, such as tapping dry, speeding up senescence, shortening the life span of rubber tree etc. in order to overcome the side effects and increase production more availably, for a long time, people had carried out lots of research work on cell level, membrane level, physiology and biochemistry of laticifer contents. but the mech anism why ethrel increased latex production was not yet understood completely. this study had cloned the ethylene receptor gene ( efrl ) from rubber tree, and researched the relationship between etrl expression in laticifers and ethrel stimulation on transcription level and protein translation level. the results were as follows : 1
但是，由於乙烯利應用的普及，乙烯利刺激割膠引起橡膠樹發生死皮病及加速膠樹衰老，縮短膠樹壽命等副作用也越來越明顯。為了克服這些副作用，使乙烯利能更有效地刺激增產，長期以來，人們在細胞水平、膜水平和乳管細胞內含物的生理生化層面上進行了大量的研究，但仍未完全了解乙烯對膠樹的作用機制。本研究從分子水平入手，克隆橡膠樹的乙烯受體基因（ etr1 ） ，並在轉錄水平和蛋白質翻譯水平上研究etr1基因在乳管細胞中的表達及與乙烯刺激的關系，取得了以下結果： 1 -
According to the principle of the interaction between the beam and the cwr ( continuously welded rails ) that the longitudinal forces of cwr on railway bridges are passed on to the piers by the span structures of the bridge, the intensity of piers is checked up by calculating and the safety reservation is analyzed so that the design of the cwr on railway bridges is optimized and is safer and more economic
摘要根據梁、軌相互作用原理（橋上無縫線路的縱向力通過橋跨結構傳遞到橋梁的墩臺上， ）檢算橋墩的強度，進行安全儲備量分析，進而優化新建橋上無縫線路設計，使設計既安全又經濟。 -
Whatever weak the present image of europe may be in comparison of the global us dominant force, its advantage is to exist and to offer an alternative that, at least on the economic front, has brought gains in prosperity and wealth redistribution on a massif scale in the relatively short time span of 50 years to a war ridden europe, unprepared in the fifties to make the necessary political and sovereignty concessions
在相較於美國獨強全球的軍事能力，歐洲看起來確實無法與其抗衡，但是歐洲模式的優點在它的存在提供了一個新的選擇，經過戰火蹂爛的歐洲，在短短的五十年之後，歐洲統合的模式在經濟上帶來繁榮，以及財富的平均分配，政治上也達成必要的政治和主權的讓步。 -
In view of special resource and ability in constructing core competence, obtaining of economic benefits and pursuit of a long life span, it draws out the basic way ? knowledge innovation. the leading thought in constructing core competence is to seek truth from facts and try to be realistic and practical
本部分從構成企業核心競爭力的資源和能力的獨特性、獲取經濟利潤以及謀求長壽之道等三個角度，提出了知識創新是構建核心競爭力的基本手段，並指出實事求是、一切從實際出發是構建核心競爭力的指導思想。 -
Under present social economic condition, bridge design should satisfy criterions of design load and increase bearing capacity in order to strengthen service performance. these are contents of bridge structural optimization. diseases in superstructure make the life - span of bridges shortened
在現今社會的經濟條件下，橋梁設計應該在滿足現行《橋規》設計荷載標準的前提下，適當提高橋梁的承載能力，增強其使用性能，而不是一味地強調造價最低，這就是橋梁結構優化的內涵。 -
The economic benefits to be brought about by the cwb is significant. in the first year alone, the cost of the time saved is estimated to be $ 2. 2 billion. over its 40 - year life span, the net benefit will accrue to a significant sum of $ 122 billion
假設中環灣仔繞道可運作四十年，落成后首年所節省的時間成本估計達二十二億，而最終可帶來約一千二百二十二億的凈效益。 -
Based on the system engineering theory, and through detailed analysis of economic techniques of the engineering work plan examples of the common used long span steel truss structures, utilizing the sequenced layer analysis, the current paper will establish the long span engineering work plan index system. also by the fuzzy mathematical principles, it builds multi - layer fuzzy complex mathematics judgment and calculate the weight coefficient of each index by application of fuzzy power duality method ; and based upon the experts investigation method builds each index judgment matrix. finally applying the current popular update system tool - power builder 8. 0 developed the " optimization system of ( construction ) fuzzy work plan " to solve and carry out the multi - layered fuzzy combination judgment ; then step on the analysis and research on the reliability of the optimal solution for further achievement of the final objective of the fuzzy optimization in selecting the construction work plan of long - span steel truss realization
本文以系統工程學的理論為基礎，通過工程實例對常用大跨度鋼桁架結構施工方案進行詳細的技術經濟分析，運用層次分析法建立起大跨度鋼桁架結構施工方案的指標體系，利用模糊數學原理建立了多層次模糊綜合評判數學模型，採用模糊權重二元對比法計算出各指標的權重系數，並採用專家調查法建立各指標的評判矩陣，利用目前最流行的工具系統- powerbuilder8 . 0編制了《建築施工方案模糊優選系統》求解計算，進行多層次模糊綜合評判；調整權重和隸屬度，對數學模型最優解的可靠性作了進一步的分析和研究，從而達到模糊優化選擇大跨度鋼桁架結構施工方案的最終目的。 -
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。 -
When qr - method is used to analyzing the long - span cfst arch bridges, the result show that this method is not only computed simply but also high accuracy and has better convergence performance, so it is a effective and economic new method
計算結果表明，利用qr法分析大跨度鋼管混凝土桁架拱橋靜力和動力問題，不僅計算簡便，而且精度高，收斂性好，是一種經濟有效的新方法。 -
The determination of the economic span of fixed assets
關于固定資產經濟壽命的確定方法 -
Research on economic life span of air defence missile weapon and equipment
地空導彈武器裝備經濟壽命研究 -
With the development of economy, more and more large - span, tall and complicated structures are built. and the damage of such structures could lead to economic loss
隨著經濟的發展，大跨、高層及復雜工程結構的建設，使結構失效帶來的損失風險增大。 -
Because they are two - - way ribbed and with re1ative1y smal1 rib spacing, reinforced concrete waff1 e s1abs exhi b it higher st if fness and smaller deflections and behave we11 under 1oads. because of their architectura1 benefits for 1ower structura1 height and l ight weight as we1l as economic benefits, they are best suited for 1arge span structures as wel1 as tal1 bui1dings
鋼筋混凝土雙向密肋樓蓋由於兩向帶肋，肋間距較小，因此不但受力性能好，而且剛度大，整體性好，變形小，結構自身高度小，材料省，自重輕，經濟性好，特別適合於在跨度較大的多層和高層建築樓蓋中採用。 -
Project design explicitly concerns technical approaches as well as consideration of the existing built environment, natural environment, economic and social factors, and expected life span
在專案設計中不僅明確地關注技術層面的方法同時也考慮現有的房屋建造環境、自然環境、經濟和社會因素以及預定設計年限等。 -
The lower density and higher strength are the most obvious characteristics of lightweight aggregate concrete ( lwac ). this new material has significantly economic and social value when it is applied to some special projects such as large - span bridges and high buildings
輕集料混凝土的輕質高強等顯著優點，使其在大跨度橋梁，高層建築等工程中應用中具有巨大的技術經濟優勢和突出的社會效益，正成為現代混凝土的一個重要發展方向。 -
The realization of this scheme not only can improve the working and living condition on the platform but also can prolong its operational life span. this is bond to bring huge economic profit to offshore engineering, so it has a promising future. to validate the effectiveness of this vibration control method experimentally, a real control system is made to control the vibration of an oil platform model under simulated wave loadings and the experiment will be conducted in the next term
根據理論分析結果，本文後面又針對一個近海平臺的實驗模型給出了該模型在模擬波浪載荷作用下的振動控制系統設計方案，並進行了系統設計，用於將來的實驗模型振動控制實驗，以驗證文中所設計變剛度調諧質量阻尼器對由波浪載荷引起的平臺振動的控制效果。 -
With the quick boom of economy and the rapid development of construction, modem buildings call for better and better material than before. steel tube confined concrete ( stcc ) has been applied in building widely and has acquired economic benefit largely for its excellent quality in structure of big span, height, and loads, good quality of behavior in bad environment, fine gift in industrialization produce. so, it " s a good material of building
鋼管混凝土能夠適應現代工程結構向大跨、高聳、重載發展並滿足承受惡劣條件的需要，符合現代施工技術工業化要求；而且具有承載高、塑性和韌性好、施工方便、耐火性能和經濟高效等優點；因而正被越來越廣泛地應用於土木工程中；並已取得良好的經濟效益和建築效果，是結構工程科學的一個重要發展方向；有著廣闊的應用前景。 -
Shafts are the important part of large hydroelectric machines. its dynamic characteristic is bound up with the reliability, life - span and economic index of the entire machines. therefore, it is important to analysis the large hydroelectric machines from the aspect of theory
軸系是水輪發電機組的重要組成部分，它的動力特性優劣直接關繫到整個機組運行可靠性、壽命和經濟指標，因此對大型水輪發電機組進行理論分析具有重要意義。 -
Abstract : through the practice of vertical pressers in long sp an continuous box - girder and the research of two - way prestress model test, the construction technology about unbonded vertical prestress is proposed and applie d in hanjiang bridge in hanchuan. for the first time, it ? s first adopted in long span concrete bridge in our country and a lot of economic benefits are created b ecause of its advantages such as little drill way, rapid and imple construction, h igh quality and so on
文摘:通過漢川漢江公路大橋大跨徑連續箱梁豎向預應力施工實踐和雙向預應力模型梁試驗研究，在該橋施工中提出並應用了無粘結豎向預應力技術.這在國內大跨徑砼橋樑上尚屬首次全面採用，它具有孔道直徑小，施工簡便快速，質量易於保證等優點，為全橋預應力施工創造了較為顯著的社會經濟效益
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