指數式穩定 的英文怎麼說

中文拼音 [zhǐshǔshìwěndìng]
指數式穩定 英文
exponentially stable
  • 指 : 指構詞成分。
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 式 : 名詞1 （樣式） type; style 2 （格式） pattern; form 3 （儀式; 典禮） ceremony; ritual 4 （自然科...
  • 穩 : 形容詞1 （穩定; 穩當） steady; stable; firm 2 （穩重） steady; staid; sedate 3 （穩妥） sure; rel...
  • 定 : Ⅰ形容詞1 （平靜; 穩定） calm; stable 2 （已經確定的; 不改變的） fixed; settled; established Ⅱ動詞...
  • 指數 : 1. [經] （比數） index number; index 2. [數學] exponent
  • 穩定 : 1 （使穩定） stabilize; steady 2 （穩固安定） stable; steady 3 （物質的性能不易改變的作用） stabi...
  1. On the basis of investigations into the progressive yield process and the possible failure modes of rcc gravity dams, the quasi - elasticity design limit state of the ctrtical stability criterion is proposed and the real working state of the dams designed according to the ctriterion is discussed. a check formula using the material strength reducing factor as the safety index and a simplified formula similar to against sliding stability fromula are derived. finally, the corresponding design safety factors are given by using fem calculations with various influence parameters to be taken into account

    本文在研究碾壓混凝土重力壩漸進破壞過程和可能失穩方式的基礎上，提出了以準彈性臨界作為穩定臨界準則的設計極限狀態，分析了按該準則設計的大壩的實際工作狀態，導出了以準彈性強度儲備系數為設計安全指標的審查公式以及形式與抗剪斷公式相同的簡化公式，探討了定量計算考慮各種因素影響的相應設計安全系數的合理取值，並與現行規范方法進行了比較
  2. The useful life curves of gan - based blue led with al2o3 and sic substrate is fit single exponential function [ i = i1 + i2exp ( - t / ) ]. fron this function, we could get aging information of led about stable inteneity 1, decay intensity i2 and decay time. the novel method of evaluating aging properties of leds was put forward

    用單指數函數擬合了發光二極體的光衰減曲線[ i = i _ 1 + i _ 2exp （ t / ） ] ，這個關系式可以給出三個信息：穩定光強、衰減光強、衰減速度，提出了更加合理的評價led老化性能的方法。
  3. Next, this unstable atom, this new radio - element which we have calle " radio - phosphorus " decomposes exponentially with a half - life of three minutes

    第二階段，這種不穩定的原子，即我們稱之為「放射性磷」的新的放射性元素在3分鐘的半排出期內呈指數級方式進行分解。
  4. At the part of empirical study, this paper chooses 124 a - stock listed companies from stock exchange of shanghai and shenzhen as research samples, makes use of the step method to filter the 13 possible variables ( including 3 debt - paying ability indexes, 3 operating ability indexes, 4 profitability indexes and 3 cash flow indexes ) in analysis and finally sets up discrimimant models by fisher discrimimant rules with the samples " financial data. then this paper validates the stability of these models using the self - validation and cross - validation before analyzing the prediction ability of these models with outside - validation

    實證研究部分主要以我國深、滬兩市124家上市公司為研究樣本，採用上市公司1998年至2001年的實際財務數據，運用逐步判別分析方法對擬進入模型的13個變量（包括3個償債能力指標、 3個經營能力指標、 4個獲利能力指標及3個現金流量指標）進行篩選，並根據fisher判別準則建立判別模型，在運用自身驗證法與互動式驗證法對模型的穩定性加以驗證后，運用外部數據驗證法對模型的預測能力進行了分析。
  5. The software ansys6. 0 is used to analysis the stability of the state after construction of tongwamen bridge, linear method is used in analyzing the finite element model of the bridge, the coeffient of stability of different state after construction is given. on the basis, the effect of different factors such as the arrangement of lateral brace, the sloping angle of arch ribs, the stiffness of bridge deck system, the effect of non - orientedly conservative loadings of the hanger and tie bar etc is discussed. the different coefficients of stability of changing these factors are given, so the factors that are vital to the lateral stability of x - type arches are found, and the rationality of the methods taken to enhance the lateral stability of tongwamen bridge is evaluated

    本文應用有限元分析商業軟體ansys6 . 0 ，採用線彈性方法，通過對該橋的空間有限元模型進行穩定性分析，得出其成橋運營階段各種工況下的穩定安全系數。在此基礎上，本文還通過有限元模型分析，就拱的矢跨比、吊桿（立柱）的非保向力效應、橋面系的剛度、橫撐布置形式、拱肋側傾角等因素對該橋整體穩定性的影響展開探討與研究。文中給出了各因素變化情況下的穩定安全系數，指出了對鋼管混凝土提籃拱橫向穩定性有顯著影響的因素及其合理變化范圍，並對銅瓦門大橋提高橫向穩定性的措施的經濟合理性進行了分析。
  6. In this paper, the drive theory of the large ratio friction transmission is studied ; a new type elliptical cam wave generator is designed ; the large ratio friction transmission prototype is designed and manufactured ; based on the ansys finite element method software, structure of the elliptical cam is analyzed ; precision index of the manufactured large ratio friction transmission prototype, such as transmission accuracy, least step, stability of the least step, load capacity is measured by the absolute rotary encoder. by analyzing the measurement data and research content, it is think that the new elliptical cam wave generator could overcome a good many problems brought by processing errors, facilitate size precision adjustments, input moment can be achieved in the form of a pure force couple importing ; through this study, " the large ratio friction transmission prototype " could apply in practical engineering basically

    本文研究了大速比摩擦傳動的傳動理論;設計了新型橢圓凸輪波發生器，設計製作了大速比摩擦傳動樣機;用軟體ansys對所設計的橢圓凸輪結構進行了有限元分析;用19位絕對式編碼器測試了大速比摩擦傳動機構的傳動精度、最小步距、最小步距的穩定性以及帶負載能力等各項精度指標;對測量數據和研究內容進行了歸納和整理，認為新型橢圓凸輪波發生器克服了加工誤差帶來的諸多問題，新型橢圓凸輪波發生器可以進行尺寸精度調整，能夠達到輸入力矩以純力偶的形式輸入;通過本項研究，基本可以使「大速比摩擦傳動機構」在工程中得以應用。
  7. According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

    本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。
  8. The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either

    在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。
  9. The core issue i " d like to discuss in this paper is the thesis that " cooperative security " is the rational choice of the security patterns in the asia - pacific area after the cold war. the following are my reasons : from the practical perspective, asean regional forum ( arf ) is the first and the only pan - regionally official " cooperative security " organization emerged in the asia - pacific area after the cold war. and it has made great contribution to the asia - pacific security : firstly, arf is the product of the asean ' s new security concept and strategy, which is in accord with the maintenance of national and regional security interest for asean and most of the states in this area ; secondly, the appearance of arf also conforms to the subjective and objective needs of big powers ; thirdly, the method to resolve the security problems by dialogue and cooperation, the building of confidence - building measures and the launching of the preventive diplomacy in arf have enhanced mutual understanding and mutual trust among asia - pacific countries

    本文要論證的中心問題就是， 「合作安全」是冷戰后亞太地區安全模式的理性選擇，理由如下：首先，從實踐的角度看， 「東盟地區論壇（ arf ） 」是冷戰后亞太地區出現的第一個，也是迄今為止唯一的一個泛地區官方「合作安全」組織，它在發揮維護冷戰后亞太地區安全方面起到了重要的作用和收到了良好的績效：第一， arf是冷戰后東盟國家新的安全觀念和以此為指導的新的安全戰略的產物，它符合東盟國家及絕大多數發展中國家保持本國及整個亞太地區安全與穩定的利益；第二， arf的出現符合亞太地區大國的主觀訴求和客觀需要；第三， arf以對話、合作解決安全問題的方式及它的信心建立措施和預防性外交的開展為亞太地區國家之間增進相互理解和信任起到了積極的作用，有利於冷戰后的亞太國家走出「安全困境」 ，實現真正意義上的普遍安全。
  10. The above algorithm forms a double - two - stage iteration, as following : the results of monte carlo stimulation show that the double - two - stage iteration algorithm is more effective than empirical logistic regression after item and ability parameters recovery study. there are three advantages about the new method : first. the new method can be applied to estimate fewer items ; secondly, a test including fewer unusual response patterns can also be evaluated ; thirdly, the results compared with homogeneous software dealing with 2plm are accepted using mean absolute error as the criterion

    這種新方法有以下三個優點：項目數很少時參數估計的結果也較穩定；能處理測驗中含有少量特殊反應模式（見第二章）的參數估計；以估計值和真值之差的絕對值（平方）的平均值作為估計對真值的修復能力為指標，新方法的參數估計結果與同類流行軟體相比，修復能力不相上下；特別地，新的參數估計方法可以用於多級評分項目gpcm ，並為估計題組項目開辟了另一條道路。
  11. Secondly, in view of the limitation and shortage of traditional simulation of finite element approaches for bolt, a new composite grouted bolt element including nonlinear contacting relation will be built based on the above study of the mechanics mechanism of fully grouted bolt. then, an elastic - plastic finite element program will be developed for the analyses of tunnel stability, in which the composite grouted bolt element and nonlinear finite element analysis method will be used ; the patterns and the affect of main design parameters on the support effect of bolt will be analysed using the program, and conclusions of guidance importance for tunnel support design will be drawn. finally, simulation compution for the excavation and support of a highway tunnel will be made out using the above production, and the method of application of the program will be discussed ; analysis of the deformation, stress and distribution of plastic range will be done, and rational support plan will be worked out, which is of guidance importance for tunnel support design and the thery and technique of fully grouted bolt used in tunneling will be perfected further

    首先，本文在綜合分析隧道穩定性影響因素及失穩破壞模式的基礎上，對全長粘結式砂漿錨桿作用力學機理進行了深入研究，為全長粘結式砂漿錨桿的有限元模擬分析奠定了基礎;其次，針對傳統錨桿有限元模擬方法的局限性與不足，在上述全長粘結式砂漿錨桿作用力學機理研究基礎上，建立出能反映界面非線性粘結的新型復合砂漿錨桿有限單元模型;然後，運用上述復合砂漿錨桿單元模型，引進非線性有限元分析手段，開發了隧道支護穩定性分析的有限元程序，並就全長粘結式砂漿錨桿的型式與設計參數對支護效果的影響進行了深入探討，得到了對隧道支護設計具有指導意義的結論;最後，運用本文研究成果對某公路隧道工程實例進行了開挖與支護的模擬計算，探討了其應用方法，並就隧道變形與應力及塑性區分佈規律進行了分析，從而提出了合理的支護方案，為隧道支護設計提供了參考依據，完善了隧道全長粘結式砂漿錨桿支護的理論與方法。
  12. Chapter 3 investigates the estimation of the domains of attraction of equilibrium points for hopfield neural networks with delays, where hopfield neural networks with discrete and distributed delays are considered. we derive a sufficient condition for an equilibrium point to be locally exponentially stable

    分別針對帶離散時間延遲和帶分散式時間延遲的hopfield神經網路，得出了平衡點局部指數穩定的充分條件，同時提出了一種指數穩定平衡點的吸引域的估計方法。
  13. Second, the coordinate figure of the first and second principal components is of great audio - visual sicnifcance. it can clearly show the distinguishing feature and similarity. this is a very useful analyzing means. third, the factor analysis can be used completely to analyzing the aligning datas in time, its calculating results reflect totally the developmental trend and changing reasons of the textile industry in tianjin

    分析結果表明： （ 1 ）在適當選取指標后，使用主成分分析法，可以將第一主成分作為一個地區綜合經濟實力的度量，其公式具有穩定的系數且結果可靠可信： （ 2 ）主成分坐標圖（如圖3 ）具有很強的直觀意義，各省市的特點及相似性都非常清楚地展示出來，這是一個很有用的分析工具； （ 3 ）因子分析法完全可以作為時間序列數據的實證分析，其計算結果客觀全面地反映出天津紡織工業的發展趨勢及其變動原因。
  14. Researching on the technology if reverse order is to study strains if pits, structural systems if basement, environmental surwey and underpinnings. on account of emphasizing developing methods if checking strength if pick - ets, modemizing machenes of excavation and studying methods of underpinning is put forward and is a way if controlling the quality of pickets in sites, which leads an active effect ; synthetic application if rankintheory, spatial and time effect theory to excavation tl aanalyze the state of soil force and strain is brought forward and the time effect should be considered in the zone of clay, the formation and development of soil plasticity are analyzed and the most dangerous zone to decide how to excavate and where to begin is found ; analyzing the cause of picket settlement during reverse order and the differential settlement and discussing hlw to solute it. duringh the temporary survey and the environmental warship, bringing rorward the theory of environmental vibration and analyzing the state of soil force and probability of losing stabilization of soil under the effect of environmental vibration ; analyzing the state offeree in underground concrete wall by the method of mathematics and pointing out the place of the maximum force and deformation. based on systematic illustrating the reverse order, problems about application and development of reverse order and suggestions also are expressed

    鑒于國內外的研究把重點放在大力發展工程樁的實驗室承載力監測方法與設備、如何使土方開挖機械現代化及對周圍建築的臨測方法上，本文提出了現場利用聲波層析成像技術監測鋼砼樁內部質量的方法與程序，並得出了聲波層析成像技術是砼樁的動態質量檢測的有效手段，這對指導施有積極、現實意義；提出了綜合運用朗肯土壓力理論、基坑空間和時間效應影響理論來分析逆作法施工過程中基坑邊坡土體應力及應變的變化情況，指出粘土地區也應考慮時間效應，並且進一步分析了基坑邊坡土體的塑性區形成和發展，找出邊坡最不利的區域，以確定地下室土體的挖掘的方式和順序，指出憑主觀臆斷與經驗來施工是不可取的；在分析、經較逆作法與大開挖順作法的地下室結構體系受力情況及施工順序的不同，提出了節點處理技術；分析了逆作法施工期間樁的沉降變化原因及由此而產生的差異，並探討了解決的方法；本文還提出了環境振動對土體邊坡穩定產生影響的觀點，並分析了在環境振動影響下，土體的應力狀態及土休失穩破壞概率，並且還運用彈性力學知識和數學分析的方法定量地分析了地下混凝土墻受力狀態，指出了被監測墻體的最大應力、應變位置。
  15. Apart from that, comprehensive damage degree is presented and its function equations are established in this paper, with exploration of the conception of applying comprehensive damage degree to the evaluation of slope stability and in its treatment. with that as a basis, seven indicators for high slope stability evaluation are put forward

    此外，還提出了綜合損傷度，建立了邊坡綜合損傷度的函數表達式，並探討了利用綜合損傷度評價邊坡的穩定性以及進行邊坡治理的基本思路，在此基礎上提出了地質條件與工程條件共同作用的7個巖質高邊坡穩定性評價指標。
  16. Firstly, the equilibrium solution is global asymptotic stability and exponential stability on l2 [ 0, l ] under neumann and dirichlet boundary control conditions, control inputs for choosing the boundary control is bounded in lx, the equilibrium solutions decay to zero and integrating the solution square in [ 0, 1 ], it decays to zero exponentially, by using nonlinear boundary control conditions and input feedback control method

    首先，採用非線性邊界條件輸入反饋控制方法，研究得到該類方程在neumann和dirichlet邊界控制條件下的平衡解在l _ 2 [ 0 ， 1 ]上是全局漸近穩定和指數穩定的、在所選邊界控制下控制輸入是l _有界的、平衡解隨時間衰減到零以及平衡解的平方在[ 0 ， 1 ]上的積分按指數方式衰減到零。
  17. Steady environment means the number of enterprises is unchanging and the technology in developing or steady phase, while the dynamic environment means the condition changing tempestuously or in the period of technology pattern changing

    穩定環境，主要是指集群內企業數目沒有大的變化而且技術處于成長或者穩定時期的階段，與此對應，動態環境下是指環境變化激烈以及處于技術範式的轉變時期。
  18. 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。
  19. Tobacco re - dryer, which is chiefly applied to roast the tobacco that is separated into leaf and stem so that the tobacco moisture is controlled at the range of technology demand, is main equipment in re - drying tobacco produce process. the present control method of tobacco re - dryer is that the references of every pid control link are set up and adjusted by human experiences. so, the control effect varies with the individual and the output tobacco moisture can ? maintain stable

    煙葉復烤機是復烤生產線上的主要設備，它的主要用途是對打葉分離之後的煙葉片進行復烤處理，使煙葉片的水分、濕度達到規定的工藝技術指標；而目前復烤機的控制方式是通過人工設定烤機各段pid控制環參數，烤機調整完全依賴操作員的經驗，因此控制效果因人而異，從而導致機尾水分不穩定。
  20. If we apply the same input to an unstable system, the output will never settle down to a steady - state phase ; it will increase in an unbounded manner, usually exponentially or with oscillation of increasing amplitude

    如果我們將同樣的輸入作用於不穩定的系統，其輸出將不會回到穩態，而是以無界的方式增長，通常其幅值是指數增長或者振蕩增長。
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