1、

But the translation-and-torsion coupling vibration of structure is a three-dimensional problem, and the experimentation is limited to the size and quantity, so the computer simulation becomes the main means to study the torsion effect.

由于结构地震反应的平-扭耦联振动是三维空间动力反应问题,结构试验研究受到试验规模和数量的限制,因而主要是依靠结构动力分析手段对其进行计算机模拟分析研究。

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2、

Based on the original three-dimensional problem, the time restriction was added to suit the four-dimensional guidance of multi-missile coordination.

在原有的三维空间的基础上增加时间维,使导弹满足协同作战的四维制导要求。

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3、

The two-dimensional limit equilibrium tends to be mature, but the problem of the slope transformation and destruction is three-dimensional problem, so, it always estimates the stability and provides the design parameters on the high side through the analysis of two-dimensional model.

边坡二维极限平衡条分法已趋成熟,但是边坡从变形到破坏本身就是三维问题,按二维模型分析,往往会低估了其稳定性,并导致治理工程设计参数偏大。

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4、

This paper statute the three-dimensional problem to two-dimensional plane and prove the sufficient condition of three-dimensional wireless sensor network connectivity coverage of the body-centered cubic structure, and also give the node deployment of certainty coverage.

本文通过把三维空间问题规约到二维平面,证明了体心立方结构的三维无线传感器网络连通覆盖的充分条件,使得体心立方结构模型可以正确的应用于三维无线传感器网络的连通覆盖。

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5、

The longitudinal deformation of the element block is governed by the compatibility conditions between the blocks, hence the three-dimensional problem of torsion of the box-girder is reduced to a one dimensional one.

梁段单元沿纵轴线的变形规律由节段间变形的连续条件控制。将箱形梁扭转的空间问题简化为一维问题。

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6、

This paper changes the three-dimensional problem into the two-dimensional problem by making use of the mapping principle and sets up a simple and accurate method that is used to design the geometric angle of wood cutting tool.

本文应用映象原理,将空间问题平面化,进而形成了一种向量法求解木材切削刀具几何角度的简单精确的方法。

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7、

For the two-dimensional problem, it can generate triangular element meshes and quadrilateral element mesh; for the three-dimensional problem, it can provide a grid cell including the tetrahedron, hexahedron, pyramid, wedge-shaped body and hybrid grids.

对于二维问题,可生成三角形单元网格和四边形单元网格;对于三维问题,提供的网格单元包括四面体、六面体、棱锥、楔形体及杂交网格等。

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9、

A two-direction shear deformation finite element model is presented in which a three-dimensional problem is reduced to a two-dimensional one and thus the calculation is much simplified.

文中提出了双向剪切变形有限元模型,使三维问题简化为二维问题,计算工作量大为减少。

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10、

The analytical results show that the distribution regularity of additional load is closely related with the relative position of underground pipeline and shield, and it is a three-dimensional problem.

研究结果表明:附加荷载的变化规律与地下管线和掘进机的相对位置密切相关,是一个三维问题;

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11、

On the ocean currents as a three-dimensional problem

论海流的空间问题

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12、

Three-Dimensional Problem in Theory of Micropolar Elasticity

各向同性微极弹性理论的空间问题

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13、

Container loading is the three-dimensional problem in "cutting and packing" problems. It is combined optimization with complex constraint condition.

集装箱装入问题是切割和装入问题领域中的三维空间问题,是具有复杂约束条件的组合优化问题。

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14、

The three-dimensional curve surface sheet forming is a hot problem studied at home and abroad for a long time, whorl-pressure forming, thumping forming, multiple point forming and numerical control single point forming and so on.

板壳类三维曲面成形是国内外长期以来研究的一个课题,有旋压成形、数控锤成形、多点成形和数控单点成形等。

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15、

The three-dimensional trajectory control problem for an airship with parameter uncertainties and external disturbances was considered.

研究了在系统存在不确定性或外界干扰的情况下飞艇的三维航迹控制问题。

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16、

Inertial navigation is essentially to solve the kinematic problem of a three-dimensional rigid body.

惯性导航本质上要解决的是一个三维空间的刚体运动学问题。

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17、

In order to overcome the structural singularity problem in the optimization process of a complex three-dimensional continuum structure, an approximate optimal model is introduced, and a three-dimensional structural virtual design method is proposed.

为了解决三维实体结构虚拟设计中结构的奇异性问题,引进了一种结构优化近似模型,并形成了一种三维实体结构虚拟设计方法。

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18、

Actually the copyright protection of three-dimensional model is also vey important problem in the security of multimedia information.

实际上,三维网格模型作为多媒体信息的一种重要形式,它的版权保护也是非常重要的问题。

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19、

By using the compound model, distribution function can be effectively separated in the aspect of time and space, the three-dimensional distribution function of the tracking problem is transformed into state control in the filed of time domain, and the control difficulty is greatly reduced.

利用该复合模型,可以对分布函数在时间和空间上进行有效分离,把三维空间分布函数的跟踪问题转化为时间域上的状态控制问题,大大降低了控制难度。

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20、

In this paper, the nonlinear diffraction problem is studied with potential flow theory in frequency domain for three-dimensional floating body sailing in waves on deep water. This problem includes nonlinear diffraction problem and nonlinear wave making problem.

本文应用势流理论和频域方法研究了三维浮体在深水域波浪中航行时的非线性绕射问题,该问题包括非线性兴波问题和非线性绕射问题。

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