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Two finite element analyses were conducted. First, the poroelastic dynamic equations were transformed to Laplace domain and the Galerkin finite element approach is applied to derive the stiffness matrix of rectangular porous element for conducting the finite element frequency domain analysis.

为探讨空间声场之特性，本文将分析方法归纳为二部份，第一部份应用拉普拉斯转换后之多孔线性弹性动态方程以二维矩形多孔弹性元素及 Galerkin有限元素法推导并进行有限元素频域分析。

We further derive the recurrence formula of computing this series.

关于这类恒等式的研究一直是非常活跃的问题，并产生了许多证明方法（见文献[18，22-23，29，41，56，70-71，78]）。

However, in more general case, such as in vector/martix-valued case, it should be noted that it appear diffcult to find recurrence relations similar to the famous three-term recurrence relation which can be used to derive surprisingly good results in the convergence theory for scalar continued fractions.

在这一章，我们把第二章的向后三项递推算法推广到向量值情形。

One is with the Recursion of Observation Equation Numbers, the other is to derive the EMBET Expressions in the Processing of Trajectory Measurement Data with the Recursion of Equation Parameter Numbers.

一类方法是随着观测方程个数的递推；另一类方法是随着方程参数个数的递推，它能够推导出关于外弹道测量数据处理的"最佳弹道估计"法的表达式。

The Redfish are reddish rockfish that derive from North Atlantic .

该鲑是红色岩表示，来自北大西洋。

Taking the active network as a research task, the input accessibility, the Coates graph of matrix and graph transmission etc are used to analyze the relation between reducibility of the coefficient matrix of the state equation and the electric separability of the network or the electric accessibility of the network for the first time, acquiring sufficient and necessary conditions that coefficient matrix of the state equation is reducible. Network Graph Theory, Matrix Theory and System Theory over F etc are used to derive the structural controllability criterion of the passive network over F for the first time. Then according to these theoretic results, the structural controllability problems of the active network over F are studied, acquiring several structural controllability conclusions of the active network.

率先将状态方程的输入可达、矩阵的Coates图、流图传输系数等概念和方法引入到对F上有源电网络的研究，研究了网络状态方程的系数矩阵的可约性与网络电气可断性或电气可达之间的关系，研究了F上有源电网络的能控性问题，获得了状态方程的系数矩阵可约的充分必要条件、F上有源电网络系统的结构能控性判据等新的结论。

Previous and so on, we derive the physical characteristic of redwood.

在红木研究方面，本文的贡献是开始使其进入定量分析的层面。

According to above at 2 o'clock, we can see those who collect what website is not easy, according to the a bitth, network address station also is such, when so we do network address to stand can derive link make it jumps to turn or be linked inside the page clicks reentrance other website, won't divide; of home page weight so from we can see at 2 o'clock, picture station and film station also do not have his content commonly, when so we are making this kind of station, can consider every pieces of picture or the language that the film gives a bit description the gender.

根据以上两点，我们就可以看出哪些网站是不容易收录的，根据第一点，网址站也是这样，所以我们做网址站的时候可以把导出链接做成跳转或者链接到内页点击再进入别的网站，这样就不会分掉首页权重；从第二点我们可以看出，图片站和电影站一般也没有自己的内容，所以我们在做这类站的时候，可以考虑每张图片或者电影都给一点描述性的语言。

We investigate this data and derive the following rules to process tunnel refection seismic data: Based on their different particle trajectories and propagation speeds and shear waves need to be separated from tunnel waves, air waves, and background noise.

通过研究这些数据，得出如下一些处理隧道反射地震数据的规则：根据不同的质点运动轨迹和传播速度把压缩波和剪切波与隧道波、空气波和背景噪音分离开来。

Here, we chose simple polynomials as shape functions, and derive the element matrice on the regular element (a isosceles triangle with a right angle).

这里选取逐渐升幂的简单多项式作为基底函数，并且据此推导了升到六阶的正规单元矩阵。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。