查询词典 projection gradient method

The method can acquire a good reconstruction result, which just needs two orthographic projection data.

该算法只需要两个正交方向的投影数据就能够获得较好的重建效果。

The basic principle is that basic geometry shape of openings in the photo is revised; the image can't be distortion by use of projection reconstruction; the corrected image is exerted by open operation and close operation of gray-image; the shape of openings is gained lastly. The perimeter borderline of openings shape is extracted. The quantity of overbreak as well as underbreak is gained by comparing to extracted perimeter and designed perimeter. The same method is applied to other opening sections. Evaluation of overbreak as well as underbreak in the openings can be easily solved in the way of quantitative.

其基本原理是：对野外摄取的洞室的基本剖面形状进行几何校正，然后应用图像学中的投影重建方法使图像不失真，对修正后的图像实行灰度图像的开操作和闭操作运算，得到洞室的基本形状，然后用图像学中的边界提取技术提取洞室的周边界，与洞室的设计形状对比分析，得到洞室在该断面上的超欠挖方量，然后对其它断面采用同样的技术就可评价某一段或整个洞室的超欠挖数量，从定量的角度解决了工程中的超欠挖评价问题。

The efficient preprocessing method of image sequences is proposed to help to increase robusticity and improve accuracy of projection algorithm.

用VC++编程实现了对航摄图像序列的实时处理，其帧处理率达25帧／秒，均方根误差小于0.32像素。

In Chapter One we give the background of large unsymmetric matrix eigenproblems and basic numerical algorithms for solving them. We review the state of the art of this subject. Finally, we describe the work of this thesis. In Chapter Two we make two improvements for the Jacobi-Davidson method combining with the refined projection principle.

本文正是在这一思想的引导下，对Jacobi-Davidson类方法进行了研究，全文共分四章：第一章介绍大规模非对称矩阵特征问题的来源、解决这类问题的基本方法以及本学科的发展现状、最后介绍本文所作的工作。

The theory and method is researched in this course for protracting mechanical engineering drawing with projection and seeking the space geometry problem. It is a compulsory technology foundation course for engineering undergraduate student , and also is the advance class of computer plotting base.

本课程是一门研究用投影法绘制机械工程图样和求解空间几何问题的理论和方法的课程，是工程类本科生的必修的技术基础课程，是《计算机绘图基础》的先修课。

A new method, projection pursuit, was used to evaluate water resources carrying capacity in river basins.

针对承载能力评价方法的研究，提出了水资源承载能力综合评价的投影寻踪方法。

The Given the example of one l00m high rock slop on the power station, The integrated projection on equator plane and ultimate balance method is introduced.

以某电厂高100m以上岩石高边坡为例，介绍了采用赤平投影图解法及极限平街法，进行岩体边坡稳定性分析的方法。

A novel pattern was designed for the calibration of structured light vision. The calibration is realized with the Zhang camera calibration method and cross-ratio invariant ruler of projection conversion.

设计了一种新型平面靶标，基于Zhang摄像机标定法和投影变换中的交比不变性，进行结构光视觉传感器系统的标定。

To reduce the requirements of memory space and CPU time,this method uses the Hausdorff distance as a measure to calculate the projection similarity,and stores the calculated results in codebooks.

为了简化计算，利用Hausdorff距离对运动目标的投影进行相似性计算，同时为减少存储空间，利用码书作为存储相似性特征的数据结构。

To solve this problem, it is necessary not only to consider the relationship caused by the difference of the method of projection, by that of the elements of ellipsoids and by that of the original data between the new and the old coordinates, but also to consider the observation errors caused by the two measurements.

解决这一问题必须考虑两种坐标间投影方法、椭圆体元素、起算数据等不同所引起的数学关系，而且还必须考虑到两次测量所引起的测量误差。本文所提出的数学模型确保以上所述数学关系准确，在此条件下，采用最小二乘法，使得由于地图投影等因素和测量误差所引起的新、旧坐标间的差异，一次加以处理。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。