求出比值 的英文怎麼說
中文拼音 [qiúchūbǐzhí]
求出比值
英文
ratio-
The best optimum mathematical model is constituted. scalar factor of structural parameter on loop rectangular negative pressure and adsorption slide is calculated. structural parameter, air gas source pressure carrying capacity and thickness of air cell are made sure by hydrodynamics and the theory of gas lubrication
詳細論述了導軌副的設計過程，運用數學上的拉格朗日條件極值求解法，建立最優化數學模型，求出環矩形負壓吸附導軌的結構參數的比例情況，並運用流體力學和氣體潤滑理論確定了環矩形負壓吸附導軌的結構參數、氣源氣壓、承載能力和氣膜厚度的確定性結論。Abstract : the paper emphasizes on exoatmospheric antimissile missile rapid reaiming problem, and according to pontryagin ' s maximum principle the optimal control law in the conditions of long miss distance and long elimination time is presented
文摘:針對大氣層外反導導彈快速重新瞄準問題，在脫靶量和消除它的時間都比較大的情況下，用龐特里亞金極大值原理求出了最優控制規律。By the large quantity of indoor and field soil mechanics test, this paper investigated physics and mechanics property of xigeda stratum and xigeda compounding filling, profoundly and systematically studied on shearing strength, cbr ( including indoor cbr and field cbr ) and intensity feature of xigeda compounding filling. the new achievement and cognition as follows : ( 1 ) cbr value is decided by moisture content and mudstone content of xigeda compounding filling. the filling material can satisfy minimum intensity standard of express highway when mudstone content is less than some fixed value, ( 2 ) this paper established field cbr standard value which can synthetically evaluate the filling material nature and field compaction degree. ( 3 ) the optimal compacting mean of xigeda compounding filling is hard oscillation first and weak oscillation later, not traditional way which is weak oscillation first and hard oscillation later. ( 4 ) this paper put forward the conception of optimum moisture content in construction different from optimum moisture content of indoor impaction
本文以昔格達填料強度特徵為研究對象，通過大量的室內及現場試驗，從昔格達地層巖組的物理力學性質、昔格達填料的物理性質入手，對昔格達填料的抗剪強度、室內承載比及現場承載比特徵進行了較系統地研究，獲得了如下認識及進展：昔格達混合填料承載比值受填料含水量及其中泥巖含量的影響，當泥巖含量小於一定值時，昔格達混合填料具有較高的承載比值，能夠滿足高速公路對填料的最低強度要求；建立了綜合評判昔格達填料性能及現場壓實效果的現場承載比（ cbr ）標準；對于昔格達填料而言，最佳的碾壓方式為先強振后弱振而不是傳統的先弱振后強振；提出了與室內擊實最優含水量相區別的施工最佳含水量的概念。And the adsorbability of this novel adso rbent for ldl was determined. in order to prepare the solid supports in accordance with with the request of adsorbent for ldl, paam beads were synthesized by inverse suspension polymerization. the composition of the polymerization system is shown as follows : the concentration of monomer and dispersant are 12 % and 0. 65 % respectively, the volume ratio of oil / water isl : 3, the mole ratio of aam and mba is 18 : 1
本文用反相懸浮聚合法合成符合ldl吸附劑載體要求的聚丙烯酰胺微珠，經實驗篩選出反應體系所需的最佳單體濃度（ 12 ） 、最佳分散劑用量（ 0 . 65 ） 、最佳油水比值（ 1 ： 3 ） 、最佳單體（ aam ）與交聯劑（ mba ）的物質的量之比（ 18 ： 1 ） 。Some examples are given in this dissertation. first, the coordinate values of a group of discrete points on the cam profile are achieved by conventional design method which are then used as measured data of the cam profile. then the kinematic analysis of the cam mechanism is performed by the method developed in this paper
本文以已知從動件運動規律的凸輪機構為例，利用正設計方法求出凸輪實際廓線一組離散點坐標值，並以此作為凸輪檢測數據，運用本文提出的分析方法進行運動反求，並將反求所得結果與理論結果加以分析比較。According to eigenvalue equation ( general formula ) of the energy method of the plane steel frame structure stability, and considering the restriction of the end of the column of the main steel frame and function of deflection curve gained from the differential balance equation general resolution, we get the equation for calculating the length coefficient of the main frame structure stability of the steel arch gate and the resolutions are also given
根據平面剛架穩定性能量法特徵值方程（通式） ，考慮弧形鋼閘門主框架柱的柱端約束的特殊情況，求出撓曲線函數（試解函數）通解，得到弧形鋼閘門主框架柱穩定性計算長度系數方程。其中弧門主框架主橫梁式形框架的臨界荷載比較現行規范推薦的有限元法簡單方便、結果精確及物理概念明確等優點。Using flyer velocity gained from energy characterizing method, definite parameters of flyer and explosive, deterministic parameters of initiation system critical initiation energy to flyer of explosive can be theoretically calculated. associating with critical initiation voltage of explosive experiment measuring comparisons and evaluations can be conducted for flyer sensitivity of explosive
利用能量損失法求出的飛片速度以及已知的飛片參數、炸藥參數、起爆系統中的既定參數，可以對炸藥的飛片臨界起爆能量進行理論上的計算，結合實驗測量的炸藥臨界起爆電壓值，可以對炸藥的飛片感度進行比較和評價。Based on the data recorded of the highest water level in the three survey stations of huangpu river, we give out the parameters estimates by using the eight estimate procedures mentioned above respectively, then we calculated corresponding values of likelihood and goodness - of - fit. we reach the conclusion that maximum - likelihood method performs better and more stable than the others
本文基於黃浦江三個水文觀測站的歷年最高水位資料，分別利用這八種估計方法，求出了參數估計值，然後分別計算似然函數值和擬合優度度量值w ~ 2 ，對這八種方法進行了比較分析。Seasonal dynamic model is introduced to analyze and evaluate tianjin raw water quality of luanhe river during 10 years for the first time, and so does for huanghe river during 4 years. based on these historical data, some long - term trend function of water quality items is got, by which seasonal fluctuation rate ( s c ) and seasonal dynamic trend of water quality items are computed. for the first time, clustering analysis is introduced to divide tianjin raw water into different levels
首次採用季節變動模型對天津市灤河水源10年的水質情況和黃河水源4年的水質情況進行了分析評價，得出各個水質指標的長期趨勢項回歸方程，根據趨勢模型和各水質指標的歷史數據求出季節比sc ，在各個指標的季節平均值和對應的季節比（ sc ）的基礎上，得到了各個水質指標的季節變化趨勢值。By successful solution of non - linear magnetic fields and revision of the program, we can reach following conclusions : in the computation of nonlinear magnetic fields, if iteration method is used, under - relaxation is necessary when amending the permeability distribution in soft magnetic materials ; and when < wp = 5 > calculating the equivalent current density in permanent magnets, under - relaxation is not a necessity ; when searching for permeability values by interpolation method on the demagnetization curve of soft magnetic materials, if a fixed saturation point is set, around this point an abrupt change of permeability values will be obtained ; this sudden change may cause a little problem in the smoothness of magnetic field distribution ; because the magnetic circuits of microwave tubes are too complicated, in the author ' s view, to describe the working state of a magnet system, the working points of magnets can not do it properly but average energy production of magnets will serve ; as to indicate the quality of a magnet system design for microwave tubes, the efficiency of magnetic energy utilization will be a very good criterion
由此得出結論，在非線性磁場計算中：採用迭代法的情況下，在各迭代循環之間進行磁導率修正時，一個欠鬆弛迭代過程是必需的；對永磁體中的等效電流修正時可以不作欠鬆弛迭代；在純鐵的磁化曲線上指定某一個固定的磁感應強度為磁飽和值，會使得插值求出的磁導率在該磁飽和值附近有一突變，這一突變對計算結果中磁場分佈變化的光滑性稍有影響。在微波管磁系統設計中，由於微波管磁路比較復雜，作者認為磁體的工作點並不能很好地反映磁體的工作狀態，而採用平均磁能積為衡量磁體工作狀態的標準更加符合微波管磁系統的實際情況；要表示磁系統設計好壞的程度，則用磁能利用的效率為標準更好。Expressions in three kinds of perfectly matched layer ( pml ) absorbing boundary conditions is also given. second, the numerical theories of the auxiliary fields fdtd method is studied, including the stability of the differential equations and the numerical dispersive relationship. the stability of two kinds of differential formulations and three kinds of pml is compared, using a straight method depending on the pmax - t graph
更進一步，研究了輔助場fdtd方法的數值理論，對其微分方程、差代方程的穩定性進行了分析，比較了有耗媒質中的兩種差分格式和三種理想匹配層中的差分格式的穩定性，提出了一種通過p _ （ max ） - t曲線判定穩定性並求出穩定性條件的直觀方法，並導出了該方法的色散關系式。In these methods, relativity degree solution is the method in which an ideal solution is established, the relativity degrees of evaluated solutions and the ideal solution are compared and orders are marshaled at last. affiliation degree solution is the solution in which ideal solution and ill - ideal solution are established, affiliate degrees between evaluated solutions and ideal solution are resolved by establishing a goal function and then orders of all solutions are marshaled according to measurements of affiliation degrees. gross profit solution is the solution in which both ideal solution and ill - ideal solution are considered, the differences between evaluated solutions and them a re measured according to n - dimension euclidean distance, and then gross profits are calculated
其中關聯度法是首先確立一個理想方案，然後比較待評估方案與理想方案的關聯度，最後根據其大小對各待評估方案進行排序；優屬度法是首先確立理想方案和負理想方案，然後把各待評方案與理想方案和負理想方案的優屬度為權建立一個目標函數，進而求出各待評方案與理想方案的優屬度，最後根據優屬度的大小對各方案進行排序；總效用法的思想是同武漢理工大學碩士學位論文時考慮理想解與負理想解二者作為參照基準，並採用n維歐幾里德距離來度量任意可行解（被評估方案）與理想方案及負理想方案之間的差異，然後指導兩個差異結合在一起計算被評估方案的總效用，評估的原則是總效用越大越好;嫡本是物理學中的概念，在信息理論中被借用來作為度量權重的一種方法，但也可用來評估各方案的優劣，其評估原則是嫡值越大越好。Abstract : the responses of shaft bow and their relationships with unbalanceresponses and mechanical or electronic run out are analyzed based on the theory of rotor dynamics. the responses of shaft bow are separated from the unbalance responses successfully by making use of vibration information under different rotor runs. an identification method of thermal bend is presented based on the 2d - holospectrum technique. experimental results show that when bow phase is steady and amplitude is variable, the tangent of initial phase point on the 2d - holospectrum is parallel, which can be effectively used for diagnosis of bent shaft
文摘:依據轉子動力學理論分析了柔性轉子彎曲響應的特徵，在此基礎上討論了它與不平衡響應及機械與電氣跳動量之間的關系，並利用轉子在不同起車情況下的振動信息，有效地分離了彎曲響應和不平衡響應，求解出彎曲量與不平衡量的比值.提出了轉子在恆定轉速下，基於二維全息譜技術的熱彎曲故障識別方法.研究結果表明，當彎曲量相位穩定而其幅值變化時，轉子響應的二維全息譜初相點的切線是相互平行的，由此可以有效地實現轉子熱彎曲故障的識別與診斷The main work can be summed up as follows : firstly, we studied the thermal - field properties of vcsels, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of vcsels, and then studied the influences of the oxide - confining region with different position or thickness, and the different sizes of the gain - guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. thirdly, we realized the coupling of electricity, optical and thermal - fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, fermi levels and optical - field
具體工作可以概括如下：首先，研究了vcsel的熱場特性，分析了電流擴展，材料參數和工作條件對于溫度分佈的影響；其次，從電極電壓入手，計算出激光器中的等勢線分佈，並對不同深度處的電壓和電流分佈進行比較，研究了高阻區的不同位置和不同厚度、限制層和出射窗口半徑的大小對電流密度、載流子濃度和溫度分佈的影響；再次，實現了電、光、熱耦合，求出了閾值電壓，計算了不同偏置電壓下的電流密度分佈、載流子濃度分佈和熱場分佈，分析了溫度和載流子濃度變化對折射率、費米能級和光場的影響；最後，給出了考慮n - dbr和雙氧化限制層時激光器中的等勢線分佈，分析了n - dbr和雙氧化限制層對vcsel電流密度、載流子濃度、溫度和光場分佈的影響。Two matlab programs are provided to get the numerical results. calculating examples are presented to illustrate the important role of viscosity of foundation in limiting the development of deflection
並編制計算程序，求出數值解；對比彈性和粘彈性地基上矩形板的撓度解，指出地基粘性效應限制地基沖擊撓度的發展。The method of multiple scales is used to determine the equations of modulation of amplitude and phase. the steady state response can be obtained by solving a couple of algebraic equations, which have been achieved by careful deduction under some conditions. and because of the complexity of the equations, programs are necessary to solve the equations mentioned above, and certain graphs are presented. based on chapter two, in chapter three, the method of multiple scales is introduced to the study of the multiple - dimensional nonlinear stochastic systems under random external excitation
在第二章基礎上，第三章將多尺度法引入到相應的隨機系統的研究中；嚴格推導了系統的約簡方程，用矩方法求出穩態解應滿足的方程，獲得一些結果；並且數值模擬結果與理論推導的結果是一致的；並注意到，與其對應的確定性系統相比較，系統響應從周期解變為近似周期解，系統的相軌線從極限環變為擴大的近似極限環；隨著激勵帶寬的增大，此擴大的近似極限環的寬度將增大。And the results of these two methods really show difference. we analyze the condition for the condensation using the concept of entropy and reach the conclusion that there will be no bec in the low dimension system. we get the relation between the critical temperature and the given number of the particles in a three - dimension infinite trap system directly, together with the tendency shown at a low temperature of the critical temperature " changing to the particle number
指出了兩種方法的結果在低溫區域的差別和高溫區域的一致性，比較結果表明，給定粒子數的系統處于低曲阜師范大學碩士研究生畢業論文第頁溫條件時，數值方法所求出的轉變溫度要比積分方法所得的結果高，並且轉變溫度隨粒子數的變化趨勢也要迅速，然後分析了兩種方法存在差別的原困。The apsp produced abroad is made by numerical controlled machine tool, which has noise level of 71db ( a ), the apsp produced in our country is made in the method of exploratory which has noise level of 73db ( a ) and 75db ( a ). in order to analyze the influence of stator curve to noise, the author used tri - coordinate measuring instrument to measured exactly the inside surface of stator and got the straddling point coordinate, and made curve fitting by using matlab as language and studied the fitting effect and then worked out the equation of stator transition curve in return seeking, then comparied this method with the standard style and made the conclusion : the equation of atator transiting curve of apsp made by numerical controlled machine tool is close to theorical 5 power curve standard style, but compared with it, the stator transiting curve of apsp produced in exploratory has a major error. combining the testing results of noise, one can know that the qualily of stator transition curve play an importance to t he noise of the pump
國外生產的汽車動力轉向泵是用數控機床加工的，其噪聲值為71db （ a ） ，國內生產的汽車動力轉向泵是用靠模方法加工的，其噪聲值分別為73db （ a ）和75db （ a ） ，為了分析定子曲線對泵的噪聲的影響，本人用三坐標測量儀對定子內表面進行精密測量，獲得定子內表面的離散點坐標，以matlab語言為工具對離散點進行曲線擬合，觀察擬合效果，然後，用回歸方法求出了定子過渡曲線的方程，並把該方程與理論方程標準型進行了比較，得出如下結論：用數控機床生產的汽車動力轉向泵的定子過渡曲線方程非常接近理論5次曲線標準型，而用靠模方法加工的汽車動力轉向泵的定子過渡曲線與理論5次曲線標準型相比較，則存在著較大的誤差，結合噪聲測試結果可知，定子過渡曲線的優劣，對泵的噪聲大小有著重要的影響。This article tries to combine the features of chongqing on the basis of concluding and summarizing the universal rules of the center of living region, compare and analyze some constructed typical central circumstance in chongqing, hope to offer some worthiness and references. this article raised the studied object at first, discusses how to use the mountains traits of chongqing to satisfy needs of people
本文力圖在歸納總結居住組團中心的一般要求規律的基礎上結合重慶的地方特色，對重慶近幾年建成的一些富有代表性的居住小區的組團中心環境作出比較分析，希望為今後的居住群體設計提供一些有價值的參考和有益的借鑒。For shutters, the results show : 1 ) according to the formula p =, the theoretical value of is calculated by the effective velocity of the flow, and its engineering value is calculated by the arriving velocity of the flow, the relationship between the theoretical value of and its engineering value is 2 ) the smaller value of declining angle will result in the smaller pressure loss and smaller outlet velocities. as a result, the declining angle of 30 擄 or less is recommended in some places which need small wind velocity, such as broadcasting studio and library, and the declining angle of 45 擄 or less is recommended in places which need big wind velocity, such as cinema and office ; 3 ) the larger value of ratio between the wide of the shutter b and the space between two boards h ( b / h ) will result in the larger pressure loss and smaller outlet velocities. the range of b / h from 0. 8 to 2. 0 and the optimum value 1. 2 is recommended ; 4 ) the range of b from 10 mm to 50 nun and the optimum value 40 mm is recommended ; 5 ) the proper thickness of the boards 8 of the shutters is 1. 5 mm ; 6 ) cuneiform boards should replace the rectangle inlet boards of the shutters in order to obtain better ventilation
數值模擬採用fluent軟體，計算結果用excel進行處理，通過對大量數值工況進行數值模擬計算，結果表明：對于單側百葉風口，計算表明： 1 ）對于公式p = （ ~ 2 ） 2 ，的理論計算值中定義為流體流經百葉風口內部時的速度，即有效速度，而工程上常使用流體的來流速度來計算，計算表明，的理論計算值與工程應用值的關系為（ _ （理論） ） （ _ （工程） ） = 0 . 813 ； 2 ）當來流速度一定時，擋板傾斜角度越小，壓力損失越小、出口速度越小；因此在要求進口風速比較小的場所，如播音室、圖書館等，宜採用擋板角度30的百葉風口；在要求進口風速比較大的場所，如電影院、辦公室等，百葉擋板的角度應選45 ； 3 ）當來流速度一定時，百葉擋板的擋板寬度b與擋板間距h的比值b h越大，壓力損失越大，出口速度越小，計算表明，鑒于壓力損失、出口風速、板間形成渦流區的大小，百葉擋板的b h值取0 . 8到2 . 0之間， b h = 1 . 2為最佳值； 4 ）當來流速度一定時，在計算的條件下，當百葉擋板寬度b = 40mm時，百葉擋板的阻力系數最小，考慮到渦流區等的影響，建議選用10mm b 50mm的百葉擋板；西安建築科技大學碩士學位論文5 ）百葉擋板的厚度取為1 . sinln為好; 6 ）百葉擋板的入口側可選用具有傾斜度的楔形擋板來代替矩形擋板，利用其較好的導流作用，可得到更好的出流效果。分享友人