查询词典 space model

Then, the differential equations are solved by the Fourier expanding and Hankel integral transform method. Integral solutions of soil skeleton displacements and pore pressure as well as the total stresses for poroelastic media are obtained. Furthermore, a systematic study on Lamb's problems in transversely isotropic saturated half-space is performed. Integral solutions for surface radial, vertical and tangentical displacements are obtained both in the case of drained surface and in the case of undrained surface excited by vertical and tangentical harmonic resources respectively. Numerical results show the obvious difference between the model of isotropic saturated poroelastic media and that of transversely isotropic saturated poroelastic media.

其次，基于Biot波动理论，在圆柱坐标系下求解了横观各向同性饱和土的Biot波动方程：通过引入位移函数，在圆柱坐标系下将横观各向同性饱和土的Biot波动方程转化为两个解耦的6阶和2阶控制方程，然后根据方位角的Fourier展开和径向Hankel变换，求解波动方程，得到以土骨架位移和孔隙水压力为基本未知量的积分形式一般解，并用一般解给出了饱和土总应力分量的表达式；再以基本解为基础，系统地研究了横观各向同性饱和半空间体的Lamb问题，考虑表面排水或不排水两种情况后，首次得到横观各向同性饱和半空间体在表面竖向和水平谐振力作用的下径向、竖向和周向位移的解析解。

On the base of the analysis of the safety situation and the safety evaluation,this paper put forward that the mine produce system is constituted by person,thing and environment,and the system is complex disaster three-dimensional system in space distributing.So Mine safety evaluation ought to be established in person,thing and environment,and then analyze and judge on mine safety system from the danger factor,the safety evaluation index,the frame model of safety evaluation and the comprehensive evaluation m...

本文在分析我国矿山安全生产严峻局势和矿山矿井安全评价国内外现状的基础上，提出矿山井下生产系统是一个由人、机、环境三方面所组成的、空间分布极其复杂的灾害系统，其安全评价应立足于人、机、环境三方面进行系统的分析与判断，并从危险因素、安全评价指标及权重、隶属函数、安全评价结构模型、综合评价方法等方面出发，以掌握矿山矿井系统的安全状态，为矿山安全管理体系的整改提供依据。

If you use a simple free space channel model, you will see a frequency shift.

如果你使用一个简单的自由空间信道模型，你会看到一个频移。

In this paper, a kind of nonlinear dynamic model of dual-arm free-floating space robot systems is

为基础，对双臂空间机器人载体姿态与机械臂末端抓手惯性空间轨迹协调运动的控制问题作

Considering the shape of well trajectory in space and the change of anti-collision distance from adjacent wells along well bore, the obstacle of drilled well was assumed as the frustum of a curved-axis cone, and a model for describing the obstacle contour was provided.

考虑井眼轨迹的空间形态和安全绕障距离沿井深变化等因素，将作为障碍物的已钻井抽象为空间曲圆台，给出了障碍物的描述模型。

Methods In the first place,the mathematical model of the dynamical response of viscoelastic thin plates is established in physical space,then the fundamental equation in Laplace domain is obtained by using Laplace transformation.

首先在物理空间建立了粘弹性薄板动力响应问题的数学模型，然后利用拉普拉斯变换得到拉氏变换域的基本方程；利用基本方程的基本解，由边界元方法得到边界积分方程，并求得数值解；最后通过数值 Laplace 逆变换得到原问题的解。

In section 4.2, we study the rescaled WLC model which is equivalent to Langer and Singer's theory of elastica because the Gauss curvature equals zero in three-dimensional Euclidean space.

我们首先讨论了Feoli 等人的结果，将之作为自由能仅为曲率的泛函的特例纳入普遍形式理论中来；并研究了Langer 和Singer 提出的关于弹性曲线的理论(即重新标度的WLC模型)，与当前理论符合得很好。

The numerical model based on energy conservation equation, takes into account of Gauss distribution, in space and time of laser spot, the finite size of sample, the temperature dependence of physical thermal properties, and the surface heat losses due to convection and radiation.

计算模型在能量平衡方程的基础上，将入射的脉冲激光在时间与空间上的分布以Gauss分布考虑，同时考虑工件尺寸、工件材料热物理性质及对流辐射造成的表面热损失等对温度场的影响。

From the point of view of geobotany, with the method of correlative factors of growth of plants, a countrywide theoretic ecological division was done for the introduction of Camptotheca acuminata and three kinds of areas of ecological preferent zone, ecological adaptive zone and ecological unadaptable zone were divided. With the theory of synecology, the characteristic on environment, constitution, life form spectrum, diversity, similarity of plots of communities were researched. Applying the method of species association, discrete distribution, indensity index, fractal geometry, etc. to research relations between the species of the communities, space distribution of Camptotheca acuminata, structure of age of Camptotheca acuminata, in different communities. Using the theories of autoecology, distibutons of seeds on land and growth of seedlings in vertical and horizontal directions, biomass of organ of Camptotheca acuminata were analyzed. On the opinions of conservation biology, the external and internal factors impressing Camptotheca acuminata were analyzed to research the mechanism of the endangered species, and with using of CTM Model, the future development direction of Camptotheca acuminata in different communities were forecasted, and. Standing on the position of resources ecology, discussing the regularity of camptothein in Camptotheca acuminata of different sites and seeding of different resources, also the the derive technics of camptothecin.

本文从地植物学的角度，运用植物生长相关因子法，对我国喜树资源的生态适宜区进行了划分，理论上确定了我国的喜树的引种栽培的最适生活区域、生态适宜区域和不适宜生活区域；从群落生态学的角度，对野生喜树所在的典型群落的群落环境、群落组成、群落生活型谱、群落的物种多样性特点、群落样地间相似性进行了研究；从种群生态学的角度，运用种间联结性、离散分布模型、聚集强度指数、分析几何等分析手段，对野生喜树所在典型群落间的种间关系、喜树的空间分布格局、年龄结构等进行了分析；从个体生态学的角度，对不同年龄组的喜树的种子的散落的垂直分布、水平分布、时间分布及种子发芽率和千里重等特点、不同种源的人工喜树苗期特点、喜树的高生长和茎生长特点、喜树的器官生物量特点进行了研究；从保护生物学的角度，对野生喜树的濒危的内部因素和外部因素进行了探讨，并运用CTM模型对不同群落中野生喜树的种群趋势进行了预测；从资源生态学的角度，对我国地理环境下喜树中喜树碱含量的地理分布规律、不同种源的喜树幼苗中喜树碱含量变化规律进行了研究，并对喜树碱的提取工艺进行了探讨。

This paper found that this main paradigms ignored the restructuring of global space and new spatial division of industry, from many reviews of the empirical researches, and failed to explain how the china urbanization do emerge and how its mechanism do trigger? With review of the globalist opinions, then, this paper tried to support the new research of urban region, including region-state model and metropolitanhind land system.

本文透过文献的评析发现，这类型的研究缺乏一个以全球空间的表述方式和新的产业分工来支持和说明中国都市化形成的机制和作用力，其次则透过部分全球主义学者的论述来支持新的研究范型，这包括区域国家和都会区－腹地系统二个空间模式。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。