查询词典 evolution equation

So in this paper a new damage variable was defined, then, Based on damage theory and Weibull distribution damage evolution rule, a simplified ameristic damage constitutive equation was established for concrete under uniaxial compression.

为了用简单的方程将上升段和下降段连接起来，本文以峰值割线模量为基准，定义了一种新的损伤变量；并以经典损伤理论模型为基础，根据混凝土损伤演化规律的概率密度服从Weibull分布，提出了一个统一的方程来描述混凝土单轴压缩时应力应变关系的全过程。

A modified Vlasov equation which describes the evolution of the spatial and momentum distribution of axisymmetrical electron beams is developed based on the statistical dynamics theory.

利用统计动力学方法建立了描述旋转对称电子束的电子空间及动量分布演化的变态伏拉索夫方程，并在一阶旁轴近似下研究出一种半解析计算方法。

The growth of H. fusiformis was determined by weighting the fresh algae every two days and the photosynthetic oxygen evolution was assayed by a Clark-type oxygen electrode. To determine the contents of chlorophyll a and UV-absorbing compounds, methanol extracts from H. fusiformis were scanned from 250 to 750 nm. The concentration of chlorophyll a was calculated using the equation of Porra and the contents of UVAC per fresh mass were estimated by determining the ratio of UVAC to chlorophyll a according to Dunlap et al and multiplying the ratio of chlorophyll a content to fresh weight of the sample used.

羊栖菜的生长是通过每两天测量一次藻体的湿重来测定的，光合放氧是用Clark型氧电极测定的，为了测定藻体叶绿素a和紫外吸收物质的含量，从250 nm到750 nm对羊栖菜的甲醇提取液进行扫描，叶绿素a的浓度用Porra的公式计算，紫外吸收物质的计算是根据Dunlap的方法先计算紫外吸收物质和叶绿素a的比率，然后乘以每单位藻体叶绿素a的含量。

By the time ordered perturbative theory and factorization, we analyze all the twist-4 evolution processes and get the relation between all the cut graphs, we obtain a new modified equation.

利用时序微扰论并根据因子化定理，我们找到有关扭度-4演化过程的不同切割图之间的联系，归纳出一个新的完整的高扭度修正的演化方程。

Based on introdued briefly the non-linear spece and its field equation solution, this article, using the concept of soliton as a example, combining with some problems in molecular evolution and the research on biological macromolecular struc- ture and function, put special stress on discussing the non-linear problems of biosystem at molecular level, and computed fractal...

在生物科学迅速发展的今天，非线性理论中的分岔、湍流、孤子、混沌以及非线性相互作用与反常涨落，非线性相互作用与突变等等的研究，已经与生物学没有找到相关文章！点击下列相关研究机构和相关文献作者，可以直接查到这些机构和作者被《中国知识资源总库》收录的其它文献，使您全面了解该机构和该作者的研究动态和历史。

Based on the idea of solving nonlinear evolution equations, algebraic method, algorithm reality and mechanization, in Chapter 3, we firstly present the new generalized tanh function method, and apply it to construct the exact solutions of the (2+1)-dimensional Kadomtsev-Petviashvili equation.

第三章基于非线性发展方程求解代数化、算法化、机械化的指导思想，以吴方法和符号计算为工具，首先提出一种新的广义tanh函数方法，并将其应用于(2+1)-维Kadomtsev-Petviashvili方程的精确解构造。

In chapter 3, the Bell CHSH operator is made from Fock states just similar to that Chen proposed in one of his papers and nonlocatily of pair cat states is calculated, then the master equation of the density matrix in phase damping model is given , from which the evolution of pair cat states in phase damping channel is given.

在真空热库中非定域性随时间演化逐渐减弱至消失。在第三章里，类似陈增兵文章里的方法用福克态构建了Bell CHSH算符，计算了对猫态的非定域度，之后给出相阻尼通道模型中密度算符的演化，研究了对猫态在相阻尼通道中随时间的演化特性。

Develop a constitutive equation taking into account the fabric tensors and their evolution modes.

发展了一个能够考虑组构张量和它的发展模式影响的本构方程。

With the nonlinear Schrdinger equation and split-step Fourier transform method, evolution of spectrum and pulse profile of quasi-continuous pump is numerically simulated, and the nonlinear mechanism for supercontinnum generation is analyzed.

利用分步傅里叶方法求解非线性薛定谔方程，数值模拟了准连续光在光子晶体光纤中传输时光谱和脉冲的演化，并分析了其非线性机理和光谱展宽机制。

In this paper a full density matrix treatment is adopted to deal with the interaction between long-pulse, circularly-polarized light and the sodium atoms. The time evolution curve of each of the 24 sub-state's population probability can be obtained by solving the Bloch equation of twenty-four hyperfine levels.

采用密度矩阵方法来处理长脉冲光与钠原子的相互作用，求解24能级钠精细结构的布洛赫方程，给出参与跃迁的每个态密度随时间的演化曲线。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。