问题

Further, in order to reconstruct flow real-time image, inverse problem is transferred to a linear system of equations by simplification based on reasonable suppose, which solves the technical problem of data processing and flow image reconstruction.

再之，根据图像重建实时性要求，通过简化反问题并将之转化为离散化线性问题，解决了测量数据处理和流动图像重建的方法技术问题。

Based on the summarizing of the exiting algorithms of the texture mapping and antialiasing, this paper goes deeply into the basic theory and processing of texture mapping. The texture compress algorithm which can satisfy the need of the memory and time is given for the stochastic sampling in the inverse texture mapping; the geometry transformation in the texture mapping are discussed and the concepts of the unitary parametrization and the patch parametrization is proposed, some kinds of the unitary parametrization methods of parametric surfaces and the geometry transformation in the patch parametrization are also presented; in order to solve the aliasing in the parametrization of intermediate surface-sphere in two-part texture mapping, an area-preserving transformation is presented also; to improve the quality of the graph the aliasing in the texture mapping is analyzed from the aspect of signal process, and the modified summed-area tables algorithms is proposed; the distortion of the scanline conversion algorithms under perspective transformation is analyzed and the proper interpolation algorithm is presented so the aliasing problem of the polyhedral object after the unitary parametrization is efficiently solved.

本文在总结现有的纹理映射和反走样算法的基础上，深入研究了纹理映射的基本原理与过程，根据反向纹理映射对纹理随机采样的特殊要求，提出了一种可满足存储空间和寻址时间的纹理压缩存储算法；通过对纹理映射中几何变换理论的进一步深入探讨，提出了整体参数化和面片参数化的概念，并给出了参数化曲面的各种整体参数化方法和面片参数化的几何变换形式；针对现有的两步映射算法所存在的中间曲面—球面的参数化问题，提出一种等积映射方法，较好地实现了由非参数化面片拼接而成的多面体表面的纹理映射；从信号采样的角度深入分析了纹理映射中走样产生的原因，提出了改进的区域求和表算法，使图形生成的效果有所提高；还分析了一般的扫描线算法在透视变换中所存在的问题，提出了一种正确的插值算法，从而解决了整体参数化后多面体表面纹理映射的几何变形问题。

In this paper we consider three inverse boundary value problems: the high-dimensional Helmholtz equation and backward heat conduction problems on the bounded region and on the cylindrical region.

本文主要研究高维Helmholtz方程Cauchy问题和有界区域，柱形区域上的反向热传导问题这三类逆边值问题。

In this paper, the property for the irreducible polynomial and questions of irreducibility for some special multinomial are studied, like the irreducibility question of , and the question for rational root on special integer polynomial of three, four times are studied.

本文研究了不可约多项式的性质和一些特殊多项式的不可约性问题，如的不可约性问题，同时研究了特殊的三次、四次整系数多项式的有理根问题。

In automatic acquisition and procession of the photoelastic data, there are some troubles about how to acquire single isoclinics and to improve the precision of evaluating isochromatic fringe orders in the thin slice of the three-dimension model when the actual problems are solved by photoelasticity.

中文题名彩色域数字光弹性中数据采集技术的应用研究副题名外文题名 Data acquisition techniques in color-field digital photoelasticity 论文作者雷振坤导师云大真学科专业固体力学研究领域\研究方向学位级别博士学位授予单位大连理工大学学位授予日期2002 论文页码总数168页关键词光弹性法图像处理数据采集彩色图像处理数字光弹性馆藏号BSLW /2003 /O348 /5 用光弹性实验处理实际问题时，在数据自动采集与处理中，如何获得单纯等倾线的问题仍是一大难点，此外就是如何进一步提高三维冻结模型薄切片的等色线定级精度问题也比较困难。

A generalization of the problem, the subgraph isomorphism problem, is known to be NP-complete.

一般化的问题，子图同构问题，是已知的NP完全问题。

Graph isomorphism problem is one of the problems that have not been classified as NP complete, or within P.

根据图同构国内外目前的研究进展，图同构既未被归入P问题，也未被归入NPC问题，是一个尚未解决的问题，有待进一步研究。

As it is well known,the graph isomorphism problem is one of a very smallnumber of problems neither known to be solvable in polynomial time norNP-complete.

目前理论上还无法证明图的同构问题究竟属于NP—完全问题还是P问题。

Graph isomorphism ; NP problem ; P problem ; NPC problem ; Graph isomorphism complete

图同构； NP问题； P问题； NPC问题；图同构完备

The interactions between a surface active imidazolium ionic liquid, 1-tetradecyl-3-methylimidazolium bromide (C14mimBr) and bovine serum albumin were investigated by surface tension, isothermal titration microcalorimetry, far-UV circular dichroism and fluorescence spectra.

不过对作者有以下建议：(1)作者应将研究这一问题的目的给予进一步说明，最好把研究问题的针对性明确，这样对本研究在理论和应用上的意义就更加明确。同时，对引言部分的引文应依据针对性问题进行必要筛选。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。