球地

This thesis contributes to geometry compression in the following aspects: Proposes a method of progressive spherical mesh parameterization based on local parameterization by directly projecting the deleted vertices to its neighborhood. Based on spherical mesh paramterization, an adaptive subdivision remeshing method by progressivly redistributing of sampling points is proposed, by this means, the main geometry information of the original mesh can be captured with only a small amount of samples, it can also be used in mesh simplification. By regarding attributes binded on mesh vertices as geometry signals and transferring them onto a uint sphere by means of spherical mesh parameterization, meshes with different attributes are compressed with spherical wavelet successfully with high compression rate. As a kind of lossy geometry compression technique, two mesh simplification algorthimes are also presented in this thesis.

归纳起来，本文的主要贡献有：提出了以直接投影局部参数化方法为基础的网格累进球面参数化方法；在网格球面参数化方法的基础之上，提出了一种基于累进优化布点方案的网格细分采样方法，该方法可以用很少的采样点就可以捕获到网格的主要特征，因此我们也将其用于后面的网格简化工作当中；通过将网格顶点上定义的各种属性看成几何信号，并以网格球面参数化为手段将几何信号迁移到单位球面上，从而成功地实现了用球面小波对各种几何信号的压缩；作为一种有损压缩方法，本文还提出了基于统一距离的网格简化算法和基于重采样的网格简化算法。

On the one hand,Magnetic Polymer Microsphere could covalent active materials—enzymes,cells and antibodies;on the other hand,they could show strong magnetic responsibility for their directional movement in the magnetic field.

一方面磁性聚合物微球可通过共价键来结合酶、细胞和抗体等生物活性物质；另一方面因其具有"在外界磁场存在下能定向运动"这一特殊性能，可对外加磁场表现出强烈的磁响应性，因此它被用作酶、细胞、药物等的载体，广泛地应用到生物医学、细胞学和生物工程等领域。

With only two balls left on the table, Fisher was easily able to dish up for the win.

只有两个球留在桌上，费希尔是能够容易地抛出为赢。

The effect of the milling time on the conductivity and the doping level was also investigated.

系统地研究了球磨时间对掺杂率和电导率的影响规律。

Downie methodically put together a 29-ball run.

唐尼有条不紊地放在一起了29球运行。

The sphere is mounted by its poles (corresponding to the celestial poles) on a metal axis, and can rotate around it. It takes a night to finish a circuit. The globe is placed in a standing hoop, which is beset into a horizontally placed hoop, supported by four pillars decorated with dragonhead patterns.

我国东汉天文学家张衡，曾经在天体仪上安装了一套传动装置，利用相当稳定的漏刻的水推动铜球，均匀地绕金属轴转动，每24小时转一圈，这一业绩已载入我国光辉成就的史料库中。

Ao's other hoops came on a layup created by a nifty drop pass from Rafer Alston, by a fortuitous offensive rebound that simply dropped into his lap, and by poor defense on the part of the Nets.

M其他的得分都来自接应阿尔斯通恰到好处的传递得到，得到的一个前场篮板也很偶然，网队糟糕的防守让球简单地掉入他怀里。

When dolphins sleepTheir electroencephalographic activity may change in only one cerebral hemisphere; i.e., the left and right brain hemispheres can take turns sleeping.

在海豚入睡时，它们的脑电活的改变仅在一侧的大脑球显示，换而言之就是海豚的左脑与右脑可以轮替地休息。

After undergoing brutal electroshock therapy, he quips that the next woman to take him on will light up like a pinball machine.

经过残酷的电击疗法，他开玩笑地说，明年她将带他上亮起像弹球机。

The ellipsoidal coordinates and the square root characteristics of the displacement jumps across the crack surface are cleverly used in the hypersingular integral equations for an arbitrary planar crack embedded into the infinite three dimensional homogeneous elastic solid.

对无限大三维均质弹性体中任意平片裂纹的超奇异积分方程，巧妙地引入椭球坐标系和利用裂纹表面位移间断具有平方根的特性，获得了受任意方向均布内压力作用下椭圆平片裂纹问题的超奇异积分方程的解析解。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。