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Finally, the comparative static analysis and the model's simple application are given.


X5 resin, with higher adsorption and easier desorption of naringin, was selected from five kinds of macroporous resins through static adsorption and desorption experiments.


The static maximum adsorption capacity of naringin is 32.6 mg/g with naringin concentration at 2.7 g/L, while the dynamic adsorption capacity of naringin is 23.8 mg/g with naringin extract flow rate at two times that of resin volume per hour.


According to Swapping technique, we develop two filters and convert dynamic parametric models into static ones to which the gradient update law is designed.


Nonlinear optimal predictive controller for static var compensator to improve power system damping and to maintain voltage

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The translational velocity of small droplets is studied as a function of the level and frequency of vibration acting together with a static force on the dropletcapillary system.


The experimental data are analyzed based on the concept of changes in the state of impurities present in silicon and in the corresponding dynamic and static force fields.


The static force in background perturbation theory


The static force FB(r) and the strong coupling αF(r), which defines the gluonexchange part of FB(r), are studied in QCD background perturbation theory (BPT).


The static force of friction between two bodies moving in a random potential and coupled by a randomly oscillating bond is studied as a function of the oscillation amplitude.

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The static force in background perturbation theory


The static force FB(r) and the strong coupling αF(r), which defines the gluonexchange part of FB(r), are studied in QCD background perturbation theory (BPT).


The static force of friction between two bodies moving in a random potential and coupled by a randomly oscillating bond is studied as a function of the oscillation amplitude.


The resiliency of the carpets piles after eliminating the static force, were measured and plotted against time, in logarithm scale, too.


The static force sensitivity of soleus tendon organ (Ib) afferents has been studied by noting their responses to graded force development produced by isometric contractions of either the whole muscle or single motor units.

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 In previous investigations exact yield conditions for axisymmetric shells are given in terms of four generalized stresses, n1, n2, m1, m2, In the present paper, the intensity of membrane stress, n, and the intensity of bending moment, m, are used to give the statical and kinematical yield surfaces for materials that obey the maximum shear stress criterion.The statical yield surface isThe kinematical yield surface isWhen the statical yield surface is multiplied by a factor 1.31, it becomes another kinematical... In previous investigations exact yield conditions for axisymmetric shells are given in terms of four generalized stresses, n1, n2, m1, m2, In the present paper, the intensity of membrane stress, n, and the intensity of bending moment, m, are used to give the statical and kinematical yield surfaces for materials that obey the maximum shear stress criterion.The statical yield surface isThe kinematical yield surface isWhen the statical yield surface is multiplied by a factor 1.31, it becomes another kinematical yield surface.Applying these surfaces to the cases of the hingesupported and the builtin spherical caps under uniform radial pressure, we obtain better upper and lower bounds for the collapse load than those given in [4]. It is interesting to note that the collapse load for the spherical cap depends essentially only upon one shell parameter. Upper and lower bounds for the case of movable hingesupported shallow spherical shell are also given.  文献[1—3]已给出了轴对称旋转壳以四个广义内力n_1,n_2,m_1,m_2表达的精确屈服条件.本文对服从最大切应力准则的壳,给出了以膜力强度和力矩强度表达的静力屈服面n~2+m=1和机动屈服面2(n1/2)~2十m=1,机动屈服面不超过静力屈服面的1.31倍.本文还应用这两个屈服面计算了受均布法向载荷作用下的简支和固定边球壳的极限载荷,改进了文献[4]给出的上下界.从给果中发现了球壳的极限载荷基本上只与一个壳体参数有关.最后还给出了周边简支可移的扁球壳极限载荷的上下界.  For the first time the exact solution for the dynamic vertical surface displacement of the homogeneous, isotropic, elastic halfspace under a vertical harmonic point load is presented in stead of the solution of H. Lamb, published in 1904. In contrast to Lamb's solution of integral representation, this paper made use of Heaviside stepharmanic function H(t)eiωt and obtained the exact solution.This solution corresponds to the wellknown Boussinesq's solution in statics. Eesults obtained by this exact solution... For the first time the exact solution for the dynamic vertical surface displacement of the homogeneous, isotropic, elastic halfspace under a vertical harmonic point load is presented in stead of the solution of H. Lamb, published in 1904. In contrast to Lamb's solution of integral representation, this paper made use of Heaviside stepharmanic function H(t)eiωt and obtained the exact solution.This solution corresponds to the wellknown Boussinesq's solution in statics. Eesults obtained by this exact solution are compared with that of the approximate solution. This exact solution might serve as a criterion for the range of validity of the existing approximate solution. In addition, the rationality of one of the conclusions on this topic drawn by D.D. Barkan is discussed.  Lamb在1904年得到了半无限体表面在竖向集中谐和力作用下位移的积分形式解。本文不利用Lamb解,而利用突加谐和力作用下的解,首次找到了Lamb问题的精确解,此解与静力弹性理论中著名的Boussinesq解相对应。与已有的近似解进行了对比,还指出了近似解可用范围以及Barkan结论中的不合理性。  A stiffness matrix of rectangular element with 12 parameters for orthotropic plateunder bending and shear effects is derived from the concept of partial strain energy approximation.To calculate the approximate value of strain energy of the element,differentshape functions are used for different terms.The basic shape functions,in which the ratioof bending stiffness to shear stiffness D/C is included,are obtained from a consideration ofdisplacements of a beam,in which the shear strain effects are considered.Therefore,thestiffness... A stiffness matrix of rectangular element with 12 parameters for orthotropic plateunder bending and shear effects is derived from the concept of partial strain energy approximation.To calculate the approximate value of strain energy of the element,differentshape functions are used for different terms.The basic shape functions,in which the ratioof bending stiffness to shear stiffness D/C is included,are obtained from a consideration ofdisplacements of a beam,in which the shear strain effects are considered.Therefore,thestiffness matrix so obtained is applicable to plates with various values of shear stiffnessincluding thin plates as a limiting case of C→∞.The stiffness matrix is expressed inexplicit form so it is easy to use.The calculations of typical static and dynamic problemshowy that it behaves quite well.  本文应用应变能分项插值的概念推导了一种具有12个参数的考虑剪切变形的正交各向异性矩形平板元素的刚度矩阵,在计算应变能的近似值时,对不同的项采取了不同的位移函数.基本的位移函数是根据考虑剪切变形的直梁的位移得到的,其中包含了弯曲刚度与剪切刚度的比值D/C,因此得到的刚度矩阵对各种剪切刚度值直至薄板(C→∞)都能应用.刚度矩阵以显式表示,使用方便.对典型问题的静力、动力计算表明结果是良好的.   << 更多相关文摘 
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