衰變定律 的英文怎麼說
中文拼音 [shuāibiàndìnglǜ]
衰變定律
英文
decay law-
This paper aims to explore systematically some scientific principles of resource - based cities from their formation and development to contabescence or transformation in the context of theories of resource life cycle and sustainable development. it also discusses the scientific issues of connotation, models and transformation mechanism of resource - based cities, makes an integrated assessment on their sustainable and renewable capiabilities of those cities and brings out several measures and policies for the transformation of resource - based cities in china
本論文的研究目的是從資源生命周期理論、可持續發展理論等出發，系統地分析總結資源型城市從形成、發展到衰亡或轉型的整個過程中的科學規律，探索資源型城市功能變化機制的科學問題，科學界定資源型城市內涵和發展或轉型模式，綜合評定資源型城市可持續發展和再生能力，探索我國資源型城市功能轉型機制和發展模式以及各種途徑與對策。Based on the illustration of the using state of industrial buildings and the present appraisal method of structural reliability, the paper indicates the relationship between structural state and reliability, by analyzing the feature rule and reason of scathe and demolish of steel workshop, and puts forward the basic view of appraisal method of structural reliability. structural state is the external performance of structure ; the decline of structural performance and decrease of the reliability level are shown as the alter of structure state. therefore, the analysis and appraisal of structure state can evaluate the structural reliability indirectly
論文在闡述我國工業建築使用狀況和現有結構可靠性評定方法的基礎上，通過分析鋼結構廠房損傷、破壞的特點、規律和原因，指出結構狀態與其可靠性之間的關系，並由此提出結構可靠性的狀態評定方法的基本思想：結構狀態是結構的外在表現，結構性能的衰退和可靠度水平的降低一般都可表現為結構狀態的變化，因此通過對結構狀態的分析和評價，可間接地對結構的可靠性作出評定。Law of radioactive disintegration
放射性衰變定律Through comparing and analyzing of bearing capacity, development of crack and strain of reinforced, the results show that the load - deflection plots f or specimens from the finite element analysis agree well with the experimental data, and choosing the rightful stress - strain relationship, utilizing ansys program, the test process can be well simulated. at the same time, making used of the program, the traditional shear wall is analyzed. it shows that comparing with the traditional shear wall, the hollow shear wall ' s cracking load drop 16 %, yield load and failure load drop 13 %, stiffness drop 13 % ~ 22 %
其次在試驗的基礎上，將試驗手段、有限元數值模擬方法和理論分析結合起來，利用有限元程序ansys對其中的兩片墻板進行非線性有限元分析，並對前後的承載性能，裂縫發展、鋼筋應變進行了比較和分析，結果表明有限元節點模型分析的荷載-位移曲線和試驗測得數據符合良好，選用合理的材料本構模型，利用ansys可以較好的模擬試驗過程；同時利用有限元模型對比分析了普通剪力墻和空心剪力墻，空心剪力墻與普通剪力墻對比，其開裂荷載下降16 ，屈服荷載、極限荷載下降13 ，剛度下降13 22 ，開裂至屈服、屈服至極限荷載階段的剛度衰減規律與普通剪力墻基本一致，空心剪力墻的後期剛度比較穩定。Subsequently, the waves induced forces and their driven effects on currents are studied in detail. in the discussion of the effects of currents on waves, according to the wave radiation theory and the law of wave action conservation, the equivalence of none vorticity condition of the vector of wave number in constant wave field and fermat theory is testified. the dynamic and kinematics effects of background currents on waves are introduced concisely
在流對浪的作用討論中，依據波動的射線理論和由變分原理導出的波作用量守恆定律，闡明了穩定波場波數矢量的無旋條件與費馬原理的等價性，扼要討論了背景流場影響海浪的運動學效應和動力學效應，首次指出水位（包括天文潮位與風暴潮位）變化對海浪成長與消衰的影響，為流浪潮聯合數值模式的發展提供必要的理論依據。And then basing on this the following opinions can be concluded : the relationship between different type of industrial location and industrial structure ; hi - tech industry can accelerate the upgrade of the industrial structure and the alteration of the industrial spatial structure ; connotation is developed primarily in the traditional industry of the old industrial area while the extension function is inconspicuous ; the industry substitute and the upgrade of industrial structure of the city takes place after the vanishing of the location of the decadent middle / small - scaled enterprises ; the upgrade of the industrial structure rests with the renovation of the product structure and the technology structure in the process of the removal of the enterprise from the downtown to the suburb
在此基礎上，得出不同類型的工業產業的區位與工業結構的關系：高新技術產業推動產業結構升級和工業空間結構變化；老工業區內的傳統工業以內涵發展為主，外延作用不明顯；衰亡的中小企業區位消失后，發生產業替代，城市產業結構升級；原市中心區內的企業向城市邊緣遷移的過程中，企業產品結構與技術結構改造，決定產業結構升級。文中有針對性的提出解決主導工業區位與工業結構關系的優化，城市老工業區的再開發等問題的方法。最後，概括性總結中國城市工業區演變的特殊規律及城市工業區變化與工業化進程關系。These unstable atoms disintegrate spontaneously, some very quickly, others very slowly, but in accordance with unchanging laws which it has never been possible to interfere with
這些不穩定的原子會自發地衰變，有些衰變的很快，有些則很慢，它們的衰變遵循著各種不可改變的規律，而這些規律是不可能受到干預的。The resistance attenuation of each element is considered in the design process, and the statistical parameters of the elements are assumed to be the same as the investigated results of china. in the process of the calculating of the element reliability attenuation in expected service life, several load combination and different load ratio of dead load to live load are considered. in order to ensure that structure reliability in expected service life satisfies the requirement of today ’ s code, a method of choosing the initial reliability index of structure basing on the length of expected service life and the structure resistance attenuation is proposed and the corresponding durability reduction factor is chosen by an optimum algorithm
根據我國現行建築結構可靠度設計原理，考慮耐久性退化影響因素，設計了抗力統計參數與我國調查結果一致的五種代表性鋼筋混凝土構件，考慮多種荷載效應組合以及不同荷載效應比，研究了不同使用期內代表性構件的可靠度變化規律;為保證預期使用期內結構可靠度水平仍可滿足現行規范要求，提出了根據預期使用期和抗力衰減幅度確定結構設計可靠度指標的方法，並通過優化的方法確定了預期使用期內的耐久性折減系數，給出了預期使用期結構可靠度設計的實用設計方法。分享友人