投影

First, we extract the boundaries between two different materials by weighting with gray-level gradient,and only voxels on these boundaries participate in the generation of each image, so it drastically reduces the rendering time. Second. We think the voxels on boundaries as the mixture of different materials,so in every voxel there is a surface. We use the oriented cube-interpolation technique to get the intersection point of viewing orientation and the surface in the voxel, then compute the surface normal of the intersection point. We use the normal to shade the voxel in order to improve the image quality.

首先，采用灰度梯度加权提取出三维数据场中不同物质间的边界，根据显示的需要只对这些边界上的体元赋予相应的阻光度并进行光亮度合成计算，因而可大大减少计算量，提高显示的速度；将边界上的体元作为不同物质的混合体，采用与方向有关的三线性插值来计算视线方向与体素内等值面的交点，根据交点的法向量进行光照效应计算以提高显示图像的质量；最后用投影成像法显示最终的图像。

The orientation of the projection surface can be normal (inline with the earth's axis), transverse (at right angles to the earth's axis) or oblique.

常见的投影方位有正轴、横轴、斜轴。

Kinetic equations of multibody systems with scleronomic constraint s are projected along the feasible and unfeasible directons of the constiaints respectively,and generalized accelerations of the systems are decomposed along the two directons using the bases of constraint matrix and its orthocomplement.

通过约束矩阵及其正交补的两组基，将定常约束多体系统的动力学方程沿与约束相容和不相容的两个方向上投影，并将系统的广义加速度沿这两个方向进行分解，得到描述系统运动的纯微分方程和求约束力的公式，同时提出了违约修正的一种方法。

Wavelet transform can be seen as translating an image into coordinate of orthogonal basis.

从函数正交分解的角度看，小波变换可以看作把图象的象素点转换成一系列正交小波基的坐标或者说是投影，每个坐标对应着这些基的能量大小。

In this paper, a new approximated model for linear time-varying systems is deduced via general orthogonal polynomials expansion by basis transformation in projection space.

通过在投影空间中的基变换，导出了一种基于广义正交多项式展开的线性时变系统的新的近似模型。

The Multiple Access Interference is suppressed by projecting the received signal onto the orthogonal complement of the estimated interference subspace.

在此基础上，通过将接收信号投影到干扰子空间的正交补空间上，实现了抑制多址干扰的空时多用户检测。

Specifically, without demanding more prior information than that for the conventional matched filter, the proposed algorithm integrates space-time coding with channel estimation, achieving the MAI suppression by projecting the received signal onto the orthogonal complement of the estimated subspace.

该算法结合空时编码技术，在对多天线信道进行估计的基础上，通过对干扰子空间的补进行正交投影，实现了抑制多址干扰的空时多用户检测。

To create an orthogonal matrix, we need to call D3DXMatrixOrthoLH and this will create a matrix for us.

为了创建一个正交投影矩阵，我们需要调用D3DXMatrixOrthoLH函数，它将为我们创建一个矩阵。

For example, one can use QR decomposition to find the orthogonal matrix B, or use the orthogonal projection matrix of A as B.

例如，人们经常使用的QR分解方法找到正交矩阵B，更直接地，B可以取为矩阵A的正交投影矩阵。

A new circuit-based method for branch loss allocation using the concept of orthogonal projection is presented in this paper.

基于正交投影概念，提出一种新的基于电路理论的支路损耗分摊方法。

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。