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The laminar flamelet model has been widely used in the recent years, but its application to the internal combustion engine is still scarce. The domestic investigation in this aspect is almost blank.

本文作为初步尝试,将层流小火焰模型应用于典型的柴油机扩散燃烧过程,以一台直喷式柴油机为对象,分别以碳十二烷与空气的单步反应和正庚烷与空气的多步反应为机理,以混和分数为自变量,以标量耗散率为参数,建立相空间中组分质量分数瞬时值及温度瞬时值的二维层流小火焰数据库。

For reducing boundary distortion area, the elevations of grid DEM are viewed as a discrete sequence under a generalized coordinate, so that the boundary problem of two-dimensional discrete wavelet transform is turned into the boundary problem of one-dimensional discrete wavelet transform, which not only greatly reduces the boundary distortion area, improves the precision of reconstructed DEM data near the boundary, but also decreases the number of zeros adding on the boundary for wavelet transform, and boosts the compression ratio. On the basis of analyzing the distribution characteristics of coefficients in low and high frequency bands, a mixed entropy coding plan is applied, and a high efficient quantizator called"self-adaptive hard threshold"is established, which is helpful for improving the precision of the reconstructed DEM data and for enhancing compression ratio.

为了减小小波变换山区格网DEM数据压缩中边界失真区域,将山区格网DEM高程值视为广义坐标下的离散随机序列,把二维离散小波变换中的边界问题转换为一维离散小波变换中的边界问题,不仅大大减少了小波变换边界失真区域,提高了重构DEM数据边界点的精度,而且减少了边界补零个数,提高了压缩比;通过对山区格网DEM数据小波变换低频区和高频区变换系数分布特点的分析,采取了霍夫曼—游程混合熵编码方案,设计了高效、低失真的"自适应硬阈值"量化器,即对低频区变换系数不进行量化,直接进行霍夫曼编码;对高频区变换系数则先用"自适应硬阈值"方法量化处理,再进行游程编码。

Moreover, with the rapid development of computer technologies and virtual reality, WebGIS map publish system has been injected new vitality; in the situation of real 3D GIS development immaturely, the study of two-dimensional electronic maps and virtual scene integrated WebGIS system has some practical significance.

此外,计算机图形学及虚拟现实技术的快速发展,给WebGIS地图发布系统注入了新的活力,在目前真三维GIS系统发展不成熟的情况下,研究二维电子地图与虚拟场景集成的WebGIS应用系统具有一定的实际意义。

However, one major limitation of the standard 12-lead ECG is that it lacks of an integral representation of the time and the amplitude information when depicted on the standard recording chart. Physicians need to visually scan all of the 12 leads for significant abnormalities and then integrate the abnormal features in his mind to learn the location and extent of the cardiac abnormality.

由於十二导程心电图是三度空间的心电讯号投射结果,然而传统的心电图所呈现资讯仅限於时间与振幅的二维变化,缺乏时间与空间整体资讯的呈现;以致於判读诊断上,由於欠缺整体资讯呈现,医师需在脑中进行组合辨识,过程较为繁琐,且对某些病症不易以目视判断。

The x-y spatially-resolved mapping of polarized Raman scattering spectra from a single tetrapod-like ZnO nanostructure were proposed and performed, with different polarized scattering configuration by utilizing the intrinsic geometry configuration.

此外,通过对量子线的磁阻测量,揭示一维结构中载流子在磁场中的输运行为。 2。首次根据四角晶须状ZnO纳米结构的天然的空间几何构型,采用不同的Raman散射配置,研究单个纳米结构的具有高空间分辨率的偏振Raman二维扫描谱。

Orientation Distribution Function reflects statistical distribution of crystals orientation in polycrystal in macrostructure. It breaks through limitation that the Pole-figure method, the inverse pole figure method which represent polycrystalline orientation distribution use one or two dimension graph and establish a three dimension space to describe the polycrystalline orientation distribution.

取向分布函数从宏观整体上反映了多晶体各晶粒取向的统计分布,它突破了传统的极图法、反极图法用一维或二维图形来描述晶体的空间取向分布的局限性,可实现晶体取向分布的三维空间描述。

By the aid of a example, the parameters were solved with the tangent line of a circle, the intersection point of tangent and thecoordinates defined by the geometrical relationship of the image based on two propositions proposed in the paper.

借助实例,在文中建立的2个命题的基础上,通过对圆的切线、切线交点及所成像的几何关系确定的的坐标进行参数求解,得到确定模型的二维像和三维像。

It likes as follows: firstly, WANG Guo-wei's Jing-Jie theory is virtually originated from Nietzschean tragedy theory and Schopenhauerian intuition theory; and it completely bases upon western philosophies and aesthetics, and practices and extends them.

其具体体现主要有两点:一,王国维的境界理论从实质上来讲更多地来源于尼采的悲剧理论和叔本华的直观理论;二,王国维的境界理论完全立足在西方哲学、美学的基础之上,是西方哲学、美学思想的一种具体运用与展开。

The Iterative Learning Control must be used on a repeatable or a peridocital system. By using motion time and iteration times as the two orthogonal vectors, a two-dimensional control system is construct, which can discribe the attribute of the dinamic behavior and learning process completely.

反覆式学习控制必须应用於具有反覆性或周期性的系统,文中将以运动时间与学习次数作为二正交向量来架构二维控制系统,使其能够完整的描述控制系统本身的动态行为与学习过程的特性。

The material job and main conclusion are as follows:(1) A simple boundary orthogonalization procedure independence grids generation method is put forward on the base of algebraic grid generation method; Data structure and computational model on interface are established aiming at blocks of structured grids.

本文针对粘流场数值模拟技术的研究现状和发展动态作了比较全面的回顾与展望,重点研究了网格生成技术、数值求解技术、湍流模型技术和动边界模拟技术,在此基础上建立了模拟自由面湍流场的数学模型,并成功地应用到二维溢流坝和带闸墩的三维溢流坝过坝水流的数值计算。

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This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

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