体元

The research of matrixes is continuously an important aspect of the quaternion division algebra. The purpose of this paper is to discuss the property of skew self-conjugate matrix. The definition of skew self-conjugate matrix on real quaternion division algebra is given.

四元数体上矩阵的研究是四元数代数理论中的一个重要方面，本文研究实四元数体上斜自共轭矩阵的性质，给出实四元数体上斜自共轭矩阵的定义。

To find these memory mapped expansion ROMs during boot, PC BIOS implementations scan real memory from 0xC0000 to 0xF0000 on 2 kilobyte boundaries looking for a 0x55 0xaa signature, which is immediately followed by a byte indicating the number of 512 byte blocks the expansion ROM occupies in real memory.

为了在开机时找到这些记忆体映射的扩充唯读记忆体，PC BIOS 会扫描实体记忆体，从 0xC0000 到 0xF0000 的 2KB 边界中寻找 0x55 0xaa 记号，接在其后的是一个位元，表示有多少个扩充唯读记忆体的 512 位元区块占据真实记忆体空间。

Objective To evaluate the feasibility and efficacy of the three-dimensional voxel imaging of multiplane transesophageal echocardiography in transcatheter closure of atrial septal defects.

目的 评价超声心动图和体元模型三维重建超声显像在经右心导管修补房间隔缺损中的价值。

Purpose To evaluate the right ventricular function by dynamic three-dimensional reconstruction of multiplane transesophageal echocardiography with voxel imaging.

目的 建立多平面经食管体元模型动态三维重建超声显像测定右心功能的方法，评价肺动脉高压对右心室形态和功能的影响。

Objective:To evaluate morphology of mitral annulus,the multiplane transesophageal dynamic three-dimensional echocardiographic reconstruction and extract technique were used for the rational design of prosthetic mitral annulus as well as improving effects of mitral annuloplasty.

目的：应用多平面经食管体元模型动态三维超声重建及三维提取技术评价正常人和二尖瓣脱垂者二尖瓣环的立体形态，为二尖瓣环成形术的合理设计提供依据。

Therefore, it is necessary to study new soft-tissue cutting algorithm, which belongs to element subdivision algorithm.

因此有必要研究一种新的基于体元剖分的软组织切割算法。

The silhouette of object on the turnable stage has been observed from multiple views through rotating. A bright background has been used to improve the contrast of images. An acquiring and processing system has been built. The 3D reconstruction algorithm has been studied based on Shape from Silhouette, and a 3D octree volume element structure model has been achieved through refining. The data will be used in 3D model repairing of laser scanning method.

本文采用单个固定CCD摄像机与转台相配合的方式，实现对物体轮廓图像的多角度采集，并使用背景照明来增加轮廓的清晰度，建立了一套自动的多视角轮廓3D测量系统，通过逐级细化的方式获得物体八叉树体元结构的三维模型，用于激光扫描法的数据修补。

In the ferrous martensite transformations, the lath martensite of substructure with high-density dislocations is made up of the transformation basic-units with same orientations whereas the plate-shaped martensite with twin substructure is made up of the basic-units with different orientations.

本文根据铁基合金马氏体和贝氏体显微组织观察以及晶体学位向关系测定，提出板条马氏体、孪晶马氏体和贝氏体铁素体均由相变基元构成，相变基元具有切变形核长大的晶体学特征。

The sixth chapter studies the relationship between MMs and stylistic feature, taking a dynamic perspective to study style, with the second section of this chapter analyzing the usages of MMs in report text and comment text of news style, the third comparing the different usage of three Chinese translations of Uncle Toms Cabin, the fourth analyzing the usage of MMs in three kinds of modern Chinese text , the fifth comparing the usage of MMs in three disciplines academic text and The sixth discussing the interactional rehtorical model, including the establishment of self-identity of speaker/writer, the expectation to reader/hearer, and the intertextuality interaction.

第六章讨论元话语和各语体语篇语体特征的关系，认为从元话语的角度来分析语体是从动态的角度来探讨言语行为和语体类型之间的关系，第二节讨论了报道体和时评体语篇中元话语使用情况，第三节比较了Uncle Tom's Cabin的文言文、古代白话和现代汉语三个译本中元话语标记使用的差异，第四节比较现代汉语三种语体文本中元话语标记使用情况，第五节讨论三个专业的学术论文中元话语标记的使用差异；第六节讨论元话语与语篇的互动修辞，讨论了语篇中表达者自我身份的确立、语篇对接受者的期待和呼吁和语篇的互动模式，说明元话语研究对探讨语篇的修辞互动模式和结构具有重要的意义。

Based on Fermat's principle, the paper uses full-path iterative algorithm to realize 3-D VSP two-point ray tracing in volume element model.

本文基于费马原理，利用全路径迭代算法实现体元模型中的三维VSP两点射线追踪。

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。