second-order condition 中文意思是什麼

second-order condition 解釋
二階條件
  • second : adj 1 第二的；第二次的；二等（的）。2 次等的；較差的；劣於…的 （to）。3 〈美國〉較年輕的。4 另一...
  • order : n 1 次序，順序；整齊；（社會）秩序，治安；狀況，常態；健康狀態；條理；會場秩序；議事程序，日程；...
  • condition : n 1 狀態，狀況，情形；品質。2 〈pl 〉外界狀況，周圍情形。3 地位，身分。4 條件；【語法】條件子句。...
  1. The fraud exception of l / c is a source of the principle of independence and abstraction and the rule of strict compliance flaw, essentially complementary and contrary to the principle of independence and abstraction and the rule of strict compliance on condition that we insist on these. the rationale behind the fraud exception of l / c may divide into two levels : the first level is " reservation of public order ". the second level is " the good faith principle ", " the fair principle ", " the security principle " and " the efficiency principle "

    信用證欺詐例外源於信用證獨立抽象原則及嚴格相符原則的制度缺陷，是在堅持信用證獨立抽象原則及嚴格相符原則前提下對其的必要否定和補充，其理論根據可分為兩個層次:第一層次為「公共秩序保留」 ，第二層次為「誠實信用原則」 、 「公平原則」 、 「安全原則」和「效率原則」 。
  2. A new computational formula to nonlinear adjustment by parameters, in consideration of the second - order terms, is derived in this paper from the precise orthogonality condition equations to nonlinear least squares by analyzing the direct solving process and iterative computing method of the linearized model

    在分析線性化的非線性參數平差的近似直接解法與迭代解法基礎上，利用非線性最小二乘的精確正交性條件方程，推導出顧及到二次項的非線性參數平差的一種新的計算公式。
  3. The condition under which higher - order dispersive effects can be neglected is also discussed with numerical examples. 6. based on the fourier optics, the focusing of ultrashort pulses by a silica lens in both cases of constant beam waist and constant diffraction length is studied considering dispersion of first, second and higher order, respectively

    6 ，使用傅立葉積分變換法，在考慮透鏡色差和高階色散效應的較為一般情況下，分別研究了等束寬超短脈沖高斯光束和等衍射長度超短脈沖高斯光束通過硅玻璃透鏡的聚焦特性。
  4. The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system

    本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。
  5. In the condition of second order transition, expressions of threshold and saturation field strength are deduced, the relations between the expressions and the parameters of lc cell including anchoring energy are calculated in detail and the tendency is expressed

    在二級轉變的條件下導出閾值場強和飽和場強的表達式，詳細計算了它們與液晶盒參量包括錨定能參量的關系，得到它們的變化趨勢。
  6. The paper is concerned with periodic solutions to nonautonomous second order hamilton systems where, m : [ 0, t ] - s ( rn, rn ) is a continuous mapping in the space s ( rn, rn ) of symmetric real ( n x n ) - matrices, such that for some u > 0 and all ( t, z ) [ 0, t ] x rn, ( m ( t ) x, x ) > u | x | 2. a s ( rn, rn ), f : [ 0, t ] x rn r is continuous and f : [ 0, t ] xr r exists, is continuous and we study the existence of periodic solutions of the systems by using ekeland variational principle and the saddle points theorem. we suppose that the nonlinearity vf and potential f belongs to a class of unbounded functional. our work improves the existed results. we obtained the results of multiplicity of periodic solutions of the systems by using lusternik - schnirelman category theory and the generalized saddle points theorem, and the functional does not need the condition of constant definite. at last, we obtained the existence of infinity many distinct periodic solutions of the corresponding non - perturbation systems by using the symmetric mountain pass theorem

    （ ? ， ? ）為r ~ n中內積， | ? |為對應范數。 f [ 0 ， t ] r ~ n r連續， ? f （ t ， x ）存在且連續， h l ~ 1 （ 0 ， t ； r ~ n ） 。利用ekeland變分原理和鞍點定理討論了該系統周期解的存在性，把非線性項和位勢函數放寬到一類無界函數，推廣了這方面工作的一些已有結果；利用廣義鞍點定理和lusternik - schnirelman疇數理論得到了該系統的多重周期解，取掉了泛函的常定要求；最後利用對稱山路定理得到沒有擾動時系統的無窮多周期解。
  7. To the cabin which is designed by the forth department chongqing communication college, the model which includes the air in the cabin, generator set and public muffler is built integer, meshed, and added by boundary condition and load. the normal k - model etc are used to be turbulence model of the air in cabin respectively, the turbulence model is calculated by simplef or simplen algorithm, and by the first order accurate msu or the second order accurate supg in advection discretization scheme

    論文對艙內空氣、發電機組和公用消聲器進行了整體建模和網格劃分，施加機組艙模型的邊界條件和載荷，採用標準k -等多個模型來分別模擬機組艙通風散熱的空氣湍流流動，採用simplef和simplen兩種不同的數值演算法以及一階msu和二階supg的對流項分離方案來對流動模型進行運算。
  8. In this paper, a class of the second order accurate explicit gauss schemes with staggered grids for the computation of solutions of hyperbolic conservation laws are presented, the advantages of these schemes are : riemann solver - free, faster and programming is much simple, no complete set of eigenvectors is needed and hence weakly hyperbolic system can be solved. in one dimensional case, these schemes are and total variation diminishing and convergence under the restriction of cfl condition, the convergence rate is the first order, and a pointwise error bound is presented

    本文在交錯網格的情況下，利用gauss型求積公式構造了一類求解雙曲守恆律的時空一致二階顯式gauss型差分格式，這類gauss型差分格式，具有不需要求解riemann問題、計算簡單、工作量少、編程簡便等優美特點，而且由於這類格式在應用於求解方程組的時候，不需要對方程組進行特徵分解，因此可應用於求解非嚴格的雙曲守恆律方程組。
  9. Second order condition

    二階條件
  10. Second - order condition

    二階條件
  11. The global attractor of the sine - gordon type nonlinear second order system under nonhomogeneous boundary condition and the stabilizability

    型二階非線性系統的全局吸引子及能穩性
  12. A hypothesis to ensure the tenability of a second - order - sufficient - condition of a linear support vector classifier is presented in the paper, which is a weak one for the solution of a linearly separable support vector classifier must meet it

    針對線性支持向量分類機優化問題，研究了其解的二階充分條件，給出了二階充分條件成立的假設條件。
  13. We analyze the generation of external cavity frequency - doubling with knbo3 crystal theoretically. in order to get the second - order nonlinear conversion from 858nm to 429nm with knbo3, we use non - critical type - i phase - matching to avoid the walk - off effect the corresponding optimum focusing condition is as followings : double refraction parameter b = 0, focus parameter = 2. 84, optimum phase mismatch parameter = 0. 574. based on the theoretical analysis and numerical calculations, we obtain the ideal nonlinear conversion coefficient about 1. 45 % / w with crystal length of 7mm and 2. 07 % / w with crystal length of 10mm at the phase - matching temperature around 23. 50c

    根據對其倍頻原理及性能的分析討論，在用該晶體完成波長從858nm到429nm的二階非線性轉換時，採用非臨界相位匹配條件（此時無離散效應，對應的雙折射參數b = 0 ，共焦長度為= 2 . 84 ，最佳相位失配因子為= 0 . 574 ） ，在相位匹配溫度約為23 . 5時，理論上通過計算得到理想情況下非線性轉換系數約為1 . 45 / w （長度為7mm ） ， 2 . 07 / w （長度為10mm ） 。
  14. We apply this condition and elementary properties of fourier series to prove a uniqueness theorem for periodic solutions of a class of second order nonlinear ordinary differential systems

    我們應用這個條件和傅立葉級數的基本性質證明了二階非線性常微系統周期解的唯一性定理。
  15. In nine - points controller control system, it utilizes k _ ( 0 ) control force achieving the static error requirement. the condition of ko = 0 could fit the second order in most control environments

    對于模型不明確的系統，我們可以同意設置k0 = 0 ，利用此時的k _ 3控製作用，把穩態誤差限制在誤差零帶的范圍內。
  16. The numerical solutions obtained in computation of riemann problem are satisfied. hyperbolic conservation laws with stiff source terms could describe the effect of relaxation as in the kinetic theory of gases, water waves and traffic flows, etc. the gauss schemes with staggered grids for hyperbolic conservation laws are applied to solve hyperbolic conservation laws with stiff source terms, a class high resolution schemes for hyperbolic conservation laws with stiff source terms are presented. these schemes are the second order accurate and tvd under the restriction of cfl condition, convergence of these schemes are proved

    本文將求解雙曲守恆律方程的交錯網格的gauss型差分格式，應用於求解含有剛度源項的雙曲守恆律，構造了一類具有高分辨，計算簡便等優點的求解含有剛度源項的雙曲守恆律的交錯網格的gauss型差分格式，證明該格式為一致二階精度的格式，證明了該格式在cfl條件限制下為tvd格式，並證明了該格式的收斂性。
  17. Abstract : on the basis of systematic synthesis, and study on the recent comprehensive geophysical - geochmical data, such as seismic, gravimetric, magnetic, electric, comprehensive logging, radiometric survey, this paper divides the second - order tectonic units of the basement of mezo - cenozoic sedimentary basins, the structure and basement lithology of sedimentary basims, and ascertains the sequential structre, occurrence depth, thickness and spatial distribution of the basin cover, and analyses the uranium source condition of the basement and provenance area, and the uranium content of cenozoic strata, as well as the mobilization and migration of uranium in cenozoic cover

    文摘:本文全面系統地整理和分析研究了巴楚地區地震、重磁、電法、綜合測井、放射性測量等最新的綜合物化探資料，劃分出了該區中新生代沉積盆地基底的次級構造單元、盆地結構構造以及盆地基底巖性；查明了盆地蓋層的層序結構、埋深、厚度及空間展布；分析了蝕源區和基底巖性的鈾源條件和新生代地層的含鈾性及鈾的活化遷移規律。
  18. Because three systems of equations solved at each iteration have the same coefficients, so the ammount of computation are less than that of the existing sqp algorithms. under some common conditions ( such as the second order sufficient condition ) which are used in some references, we prove that the algorithm possesses not only global convergence, but also strong convergence and superlinear convergence

    該演算法在每次迭代時所需解的三個線性方程組具有相同的系數，因此計算量要比現有的sqp方法有所減少；在與一些文獻平行的假設條件（如二階充分條件）下，論文證明了演算法不僅具有全局收斂性，而且還具有強收斂性和超線性收斂性
  19. We investigate in section 1 the oscillation and nonoscillation of nonlinear neutral difference equation, ith continuous arguments, and get a sharp condition of the oscillation. some comparison theorems are studied for the oscillation and nonoscillation of linear neutral difference equation, ith continuous arguments in section 2. in section 3, e investigate the existence and asymptotic behavior of nonoscillatory solutions of second order neutral delay difference equation

    第一節中研究具有連續變量的非線性中立型差分方程的振動性與非振動性，得到了振動性的「 sharp 」條件：第二節研究了具有連續變量的線性中立型差分方程振動性與非振動性的一些比較結果；在第三節我們研究了二階中立型時滯差分方程的非振動解的存在性與漸近行為； g
  20. Another contribution in this paper is that a novel absorbing boundary condition based on the one - way wave equations has been proposed. it is more effective both in theoretical analyses and numerical simulations when compared to other widely used boundary conditions such as second order mur abc ' s

    本文的在應用對時域有限差分法的同時，也對其吸收邊界條件進行初步研究，提出了一種新的局域吸收邊界條件，並通過計算機模擬證明了這種邊界條件的有效性。
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