二维的

Finding 3D edges directly from 2D points, the algorithm is superior to the general algorithms in this field; introducing a cylinder as an additional subobject, it extends the domain of 3D objects which can be generated by the general algorithms for reconstruction.

算法直接由二维点求三维边，从而改进了这一领域的一般算法。通过引入圆柱体作为附加的子实体，扩充了一般算法产生的三维实体域。

Digital Signal Processing Module, including convolve, deconvolve, correlate, Signal Generator, Hartley Transform, Fourier Transform, Windows Function, Finite and Infinite Impulse Response Filter.

通用软件平台主要由六类软件开发包来实现，包括： 1。数字信号处理软件包：负责基础的数据处理，针对仪器所分析的信号从单独离散量，到一维谱图、二维图像及动态分析系统的多维数据等，提供信号生成、时域处理、频域处理、窗函数和滤波器设计等功能函数。

Relation and Application of Density and Compression Strengh of Effervescible Polystyrence Foam Material;2. On the basis of discussing principle of foam material cell shape,this research studied two methods to measure cell diameter and its distribution,which are picture process and fractal dimension.

探讨了泡沫材料泡孔结构形成原理及泡沫材料孔径与分布测量途径，并实际运用图像处理和分维二种创新的测量方法对泡孔进行测量分析，其二结果相当一致，从而证实了图像法与分维法的可行性，同时说明了分维的科学性。

By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.

在窄带条件下，GSC－SSF方法还可以提高阵列的虚拟孔径，从而提高估计的性能；可以证明，Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似； 3、提出了二维GSC－SSF方法和宽带谱相关DOA矩阵方法，利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题，并具有阵元数少、计算量较小的特点； 4、提出了时频子空间拟合和宽带时频DOA估计算法，将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中，利用时变滤波实现信号选择性测向和干扰抑制，特别适合于谱时变信号；可以证明传统特征结构法可看作是时频子空间拟合方法的特例； 5、提出了多用户环境下阵列响应的估计方法——CARE方法，该方法对信号结构和传播参数（主要是散射源分布与角度散布）的约束较少，适用于各种几何结构的阵列甚至未校准的阵列，能够直接得到阵列响应的闭式解，因此计算量小、稳健性好，不存在收敛问题； 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案，通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束，并保证各波束内的用户信号各不相同且相互干扰最小；其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点，其有效性已得到外场实测数据的证实。

VOF method was used to track the shape and location of free face, and PISO method was used to couple the velocity field and pressure field. By the 2-D and 3-D numerical simulations of the flow in sprinkler component under different states, the preliminary flow law of the sprinkler was revealed for the first time.

6采用三维非定常N-S方程作为控制方程，利用标准κ-ε紊流模型封闭雷诺时均方程，并利用VOF方法求解追踪自由表面的形状和位置，采用PISO算法耦合速度压力场，首次对喷头射流元件内部流动的不同运行状态进行了二维、三维数值模拟，初步揭示了内部流动的一般规律。

We can compute three dimensionalvelocity distribution on a planar domain of flow field based on conventional ParticleImage Velocimetryand 3D reconstruction theory of stereophotogrammetry.

在流场空间两个不完全交叠的体积元(映射为两个摄影机象平面上以同名点为中心的两个相同大小的判读小区域)中的示踪粒子的统计性质都能同样表征这两个体积元公共中心的流体运动的假设下，PIV技术与体视三维重建理论的结合，可以将原PIV技术中二维统计平均的概念扩展为三维统计平均，并且在确定体积元公共中心位置之后，直接实现空间流体体元的三维位移重建。

Mandibular teeth and sustentacular tissues extracted from a healthy adult were treated using CT scanning to obtain two-dimensional image, and then a three-dimensional image was established using computer reconstruction technique. Simultaneously, a three-dimensional finite element model of rigid fixed bridge was established in abutments with mandibular 56 deletion.

采用CT扫描获取健康成人下颌牙及其支持组织的二维图像，通过计算机重建技术建立三维立体图像并获得了下颌56缺失后的双端单基牙固定桥的三维有限元数学模型。

Conclusions］Complex acetabular fractures with displacement should be evaluated by means of 2D rconstruction and three-dimensional multislice spiral CT.However 3D CT is of little practical value in undisplaced acetabular fractures.

结论］对于有移位的髋臼骨折尤其是复杂的骨折，应尽可能行二维及三维CT重建协助完善术前准备，三维CT对无移位的髋臼骨折实用价值不大。

The relationship between an object s three dimensional entity and its two-dimensional multi-views can be expressed vividly and visually by Solid Edge V11 parametric molding software, which constructs three-dimensional entity model and represents an engineering object spatially and dynamically.

用SolidEdgev11参数化造型软件建立三维实体模型，以真正的空间概念和动态方式表示工程对象能形象直观地表达一个对象的三维实体与多幅二维视图之间的关系。

Based on basic theory of elastic wave propagation, wave equation forpropagation of elastic wave in 2 dimension vertical inhomogeneous mediumof similar concrete cutoff wall model is developed. 2 dimension elastic sheetof concrete cutoff wall is established to research law and energy distributionrelations between propagation, attenuation, reflection and transmission ofelastic wave in concrete cutoff wall; Based on the concept of resolution, thecontent of vertical reflection method used to inspect concrete cutoff wallresolution is raised and factors will have influences on resolution are analyzed,expression of defective layer composite reflection factor and detectabledefective layer maximum thickness are developed; Relations between allsteps of sampling system of vertical reflection are build, the influence ofcentrum characteristics and receiving sensor on testing results are analyzed,therefore parameter requirements for testing instrument and parameter selection principle of collected parameters are raised.

2从弹性波传播的基本理论研究出发，推导了弹性波在类似混凝土防渗墙模型的二维垂向不均匀介质中传播的波动方程式；建立了混凝土防渗墙二维弹性薄板模型，研究弹性波在混凝土防渗墙中的传播、衰减、反射、透射规律及能量分配关系；从分辨率的概念出发，提出了垂直反射法检测混凝土防渗墙分辨率的内涵，对影响分辨率的因素进行了分析，推导出了缺陷层复合反射系数、可检测缺陷层极限厚度的表达式；建立了垂直反射法采样系统各环节之间的关系，研究分析了震源特性、接收传感器对测试结果的影响，提出了对测试仪器参数的要求及采集参数的选择原则。

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。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。