模型眼

The vibration of drilling string in horizontal well is closely related with the overall length of the drill string and structural shape. In this paper ,a mechanical model of longitudinal vibration of drill strings is established by studying the overall drilling string,seeing a hole as arbitrary bending curve in three-dimensional space.

本文以整体钻柱为研究对象，将井眼视为一条可以任意弯曲的三维空间曲线，建立了水平井钻柱纵向振动分析的力学模型。

The propagation of elastic wave in a cylindrical bore hole containing a fluid (for example, the muddy fluid is generally used) for acoustic logging is analyzed with a simplified model.

本文分析了简化模型下声波测井时裸眼井中弹性波的传播，此波场可看成是轴向传播有不同波矢的分波的叠加。

The optimization model which the horizontal well drawdown is regarded as objection function and the perforation distribution as decision variable is presented.

建立了以水平井生产端压差为目标函数、以孔眼分布为决策变量的优化模型，同时和均匀流入剖面、均匀射孔分布的结果进行了对比。

ased on the parameters of real structure and physiology of Beijing firefly's compound eye, an analogue of the dioptric system of an ommetidium was established.

以实际的北京萤火虫复眼结构与生理参数与依据，基于已知的GRIN透镜特征，把小眼的整个光学系统分成几个部分被模型化。

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。

When a light is positioned in eye space, i.e. relative to the eye, it should be positioned when an identity matrix is on the MODELVIEW stack.

当一个光源点被定位在眼空间坐标中，也就是和眼睛相关的时候，它应该在模型视图矩阵规格化之后再设置位置。

New York: McGraw-Hill, 1999.106～110 Blaker J W. Toward an adaptive model of the human eye.

基于主观式测量人眼波前像差的眼模型研究。

Design of digital retina camera based on eye model［J］.

基于眼模型的数字眼底相机设计［J］。

Individual eye model capturing more anatomy properties and structural features of human eye has important experimental and clinical value.

包含更多人眼解剖学特性的个性化眼模型具有重要的实验和临床意义。

Construction of individual eye model considering the orientation of visual axis .

考虑视轴方向的个性化眼模型的构建。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。