三维

In this paper, on the base of paraxial approximations, we present a set of absorbing boundary conditions of 3D elastic wave equations and apply to the 3D elastic wave numerical modeling in isotropic medium.

本文基於傍轴近似法提出了计算三维弹性波方程的吸收边界条件公式，表示了各边界面、边棱和角点处波场所满足的单程波方程，并在三维弹性波数值模拟中进行了应用。

Probability: Studies on the emerged accident probability of major hazard carrying the Markow process; Severity: By applying the grey system theory , on the base of the same kinds of accident-economy cost, establishes self-adapting GM (1,1) forecasting model and the model with the residual error being amended in a bid to calculate accident-economy cost; Safety management: Establishes the dynamic comprehensive analytical method on major hazard and safety management of the major hazard by applying the grey system theory and fuzzy math theory.

其次，针对重大危险源原有的二维评价方法所存在的局限性，建立了以可能性、严重性、安全管理水平为三维矢量的评价方法，并对这三个矢量进行了定量计算：可能性：运用马尔可夫过程计算了重大危险源发生事故的概率；严重性：运用灰色系统理论，根据已有的同类事故经济损失的统计资料，建立自适应性GM(1，1)模型及残差修正的模型，预测重大危险源发生事故的经济损失；安全管理水平：运用模糊数学理论和灰色系统理论，建立了重大危险源安全管理水平动态综合分析法。

According to the difficulties of designing and molding aerofoil blades, a application program which can be used to exactly draw profile curve of blade section is developed with VBA, which is based on the analysis of calculation method for designing and molding aerofoil blades and adopts OLE provided by CAD software SolidWorks.

在分析翼型叶片造型计算方法的基础上，针对翼型叶片造型的难点，利用三维 CAD 软件 SolidWorks 提供的 OLE 应用编程接口，使用 VBA 开发了准确绘制叶片截面轮廓曲线的应用程序，并给出了叶轮三维建模的方法和步骤。

For macro-observer, the actual effect of the high precision dynamic 3D image maps is equal to take the plane in certain height to observe along the selected air lane; for image interpreters, the maps offer the true, objective, continuous ground-sight images that can be repeatedly used for macroscopic analysis. The method of "RS geo-interpretational 3D visualizing and dynamical analysis to image" exploits new working ideas for regional geo-survey in altiplano, and it is great significance and practical value to improve modern degree of digital regional geo-survey.

生成的高精度三维遥感影像动画系列图，对于宏观观察者(如领导干部、项目决策者等)而言，其实际效果相当于乘坐在一定高度的飞行器上进行航空路线观察；对于遥感图像解译者而言，高精度的三维影像动画系列图提供了可供反复使用的真实、客观、信息连续的宏观分析地面景观影像。

The meaningful regions obtained by range image segmentation correspond to the surface patches of 3D object.The 3D surface patches are then reconstructed by the algebraic surface fitting method;the surface parameters are estimated by solving generalized eigenvector problem. The geometric model of 3D object is constructed from reconstructed surface patches by using CAD geometric modeling tool GEOMOD.

首先通过编码光栅方法获取三维物体的深度图象，并采用数学形态学的方法加以分割，然后利用代数曲面拟合手段对分割后的三维曲面片进行重建，并使用CAD几何建模工具由重建的曲面片构成物体的几何模型。

This thesis contributed to the comprehensive study of the Finite-Difference Time-Domain method and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies. The work includes mainly three parts: the study on the performance of PML absorbing boundary condition applied to pseudo low frequency electromagnetic problems; the validation of the FDTD method with PML absorbing boundary conditions and the corresponding computer software based on the numerical study of the electromagnetic field of an electric dipole antenna, and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies; the development of an improved alternating direction implicit finite-difference time-domain method.

在综合前人工作基础上，本文对时域有限差分法及其在开关电源辐射电磁场数值计算中的应用进行了系统的分析和研究，其核心内容包括：伪低频电磁场数值计算中PML吸收边界条件性能的研究；基于基准问题—电偶极子天线三维辐射电磁场，验证了本文构造的基于PML吸收边界条件的三维FDTD法及其计算软件，并应用于高频开关电源辐射电磁场的数值分析；提出了一种改进的交替方向隐格式时域有限差分法。

All of the system function is using the design of VC++ and theory of alternation between people and computer.

三维重建系统的功能实现是采用了VC++的界面设计和人机交互的原理，达到了能够简单方便的对三维模型进行多种操作的目的。

A new GIS software company in China as well as its industry backgroud,also the GIS industry competition structure and development status. Furthermore, a study was done on both of its competitive structure and other factors against the external environment and of its strengths, weakness, opportunities, threats and other factors facing the internal environment in this field. Based on this study and the mission and the developing target of the company, established the general developing strategy of the company --- based upon Geospatial information industry, continuing to keep the monopoly status and anabasis GIS industry at the same time.Rely on the photogrammetry technique to build the brand in 3D GIS market to gradually form competition advantage.Take technique development tactic, such as intergrate with other kind of techniques, combine with 3D core techniques and purchase 3rd-technique;take tactic to make products cater to market, such as promote the products service definition, enhance the added-value development ability, improve products management and design, adopt 3rd products,etc;And particuliar marketing tactic,such as service marketing, relationship marketing, difference marketing and brand marketing,etc. At last, point out that should import professional managers to promote company quality and industry competition ability.

本文描述了一个新进入 GIS 领域的软件企业——适普软件有限公司的发展历史及所处行业背景，客观分析了它所处 GIS 行业的竞争结构、发展现状等外部环境，通过深入分析公司所面临的机遇、威胁、优势、劣势等因素后，结合公司的宗旨及整体发展目标确立了公司的总体发展战略——立足空间地理信息领域，维护公司在摄影测量市场的垄断地位，同时进军 GIS 市场，以摄影测量核心技术为依托，在三维 GIS 细分市场创立品牌，并逐步形成竞争优势，同时提出采用多种渠道发展技术、产品全方位适应市场、强化市场营销及市场开发多元化的竞争策略，并其进一步细化为技术开发策略，如与其他信息技术的结合、与真三维核心技术的结合、技术收购策略等；产品策略，如提高产品的服务理念、提高产品二次开发能力、提高产品管理和设计、采用第三方产品开发等；以及市场营销策略，如采用服务营销、关系营销、差异化营销、品牌营销等方式；最后提出公司应该引入职业经理人制度从管理角度全面提升公司质量，提高行业竞争力。

The time-frequency analysis to do 3D graphics source files, the program can draw signal frequency, and the ti...

有关时频分析做三维图形的源程序，该程序可以绘出信号，频率，以及时频三维图形，对信号的特性分析可以较好把握！

By observing and analyzing 3D structure of apple flower and inflorescence, we raised the 3D structure mathematical model of anthocaulus, receptacle, calyx, petal, androecium and pistil. At the same time, we get model parameter, integrate the apple flower and inflorescence topology structure information, reconstructed 3D structure of apple flower and inflorescence.

通过对苹果花及花序形态结构的观测分析，分别提出了描述花柄、花托、花萼、花瓣、雄蕊和雌蕊三维形态结构的数学模型，并提取了模型的控制参数；进一步整合苹果花及花序的拓扑结构信息，实现了苹果花及花序的三维重建。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。