http://hdl.handle.net/10397/1782 Search the Channel search http://repository.lib.polyu.edu.hk/jspui/simple-search http://hdl.handle.net/10397/2550 Title: Three-dimensional affine transformation method and satellite remote sensing image geometry correction method = 卫星遥感影像几何校正方法<br/><br/>Authors: Abd Elrahman, Ahmed Mohamed Shaker (艾麥德‧夏德嘉); Shi, Wenzhong (史文中)<br/><br/>Abstract: A three-dimensional affine transformation method employs ALBTM (a three-dimensional affine model based on line feature) to express the relationship between two-dimensional space and three-dimensional space, and the specific mathematical expression of ALBTM is Sax=C1AX+C2AY+C3AZ, Say=C5AX+C6AY+C7AZ, wherein the (ax, ay) are unit vector components of a line-segment in two-dimensional space, the (AX, AY, AZ) are unit vector components corresponding to a conjugate line segment of the line-segment in the three-dimensional space, the S is the proportional divisor of the line-segment and the conjugate line segment, the C1-C3 and C5-C7 are rotary parameters of the ALBTM. Disclosed also is geometry correction method of satellite remote sensing images, which includes step 1 obtaining at least two satellite remote sensing images data, step 2 respectively computing the model parameter for three-dimensional affine transformation of image space and terrain space of each satellite remote image on the basis of the image data and by the three-dimensional affine transformation method, step 3 defining the coordinate of center point of the image space in the terrain space according to the model parameter.; 三维仿射变换方法，用ALBTM(基于线特征的三维仿射模型)表达二维空间和三维空间之间的关系，且所述ALBTM的具体数学表达式为 Sax＝C1AX+C2AY+C3AZ， Say＝C5AX+C6AY+C7AZ；其中所述(ax，ay)为线段在所述二维空间的单位矢量分量，所述(AX，AY，AZ)为该线段在所述三维空间中对应共轭线段的单位矢量分量，所述S为该线段与其共轭线段的投影比例因子，所述C1～C3和C5～C7为所述ALBTM的旋转参数。以及应用该三维仿射变换方法的卫星遥感影像几何校正方法，包括：步骤1，获取至少2幅卫星遥感影像数据；步骤2，基于所述影像数据并通过上述三维仿射变换方法分别计算每幅卫星遥感影像的影像空间与地物空间进行三维仿射变换的模型参数；及步骤3，根据所述模型参数确定所述影像空间中点在地物空间的坐标。 Wed, 10 Nov 2010 00:00:00 GMT http://hdl.handle.net/10397/2549 Title: Method and device for displaying navigation circuit = 导航线路显示方法及导航线路显示装置<br/><br/>Authors: Li, Zhilin (李志林); Chen, Wu (陳武); Xu, Zhu (徐柱); Chen, Yong-qi (陳永奇); Cheung, Yik Kong (張奕港)<br/><br/>Abstract: The invention discloses a navigation route display method, which comprises the following steps: extracting crossings from acquired navigation routes; segmenting the navigation route according to the extracted crossings; calling a crossing symbol template base for anyone of the extracted crossings and extracting corresponding crossing symbol; linearizing each segment of the navigation route; and linearly connecting the linearized segments of the navigation route by the extracted crossing symbols, and displaying. The invention also discloses a navigation route display device. The method and the device disclosed by the invention can clearly, concisely and intuitively display the navigation route information and have good readability. Particularly, the device can completely and clearly display the navigation route on a smaller screen.; 本发明公开了一种导航线路显示方法，包括从已获取的导航线路中提取交叉口，根据所提取的交叉口进行导航线路的分段，对提取的任一交叉口，调用交叉口符号模板库并提取相应的交叉口符号，直线化处理每一导航线路段，以所提取的交叉口符号线性连接所述直线化处理后的导航线路段，并加以显示。本发明还公开了一种导航线路显示装置。通过本发明公开的方法及装置，能够清晰、简明、直观地显示导航线路信息，具有较佳的可读性；尤其便于在较小的屏幕上实现导航线路的完整、清晰显示。 Wed, 27 Oct 2010 00:00:00 GMT http://hdl.handle.net/10397/1955 Title: 2D dynamic calibration console and calibration method in use for global positioning system = 用于全球定位系统的二维动态校准台及校准方法<br/><br/>Authors: Xu, Y. L. (徐幼麟); Ding, Xiaoli (丁曉利)<br/><br/>Abstract: The invention discloses a 2D dynamic calibrating table, for calibrating a GPS system arranged on a construction, comprising: a bearing frame, a moving platform, a double-layer two-way movement mechanism arranged between the bearing frame and moving platform to drive the moving platform to make 2D motion in two orthogonal directions, an electronic control system arranged on the bearing frame to control the driving action of the double-layer two-way movement mechanism, a GPS receiver arranged on the bearing frame, a computer system for sending control instructions to the electronic control system according to original input movement signal; besides, the computer system also obtains the GPS information received by the GPS receiver so as to obtain the GPS system-monitored result of 2D motion of the moving platform. By comparing the monitored result with the motion signal of the moving platform, the invention obtains the monitoring accuracy of the GPS system.; 本发明公开了一种二维动态校准台，用于校准布设在结构物上的GPS系统，包括：一支承框架；一运动平台；一双层双向运动机构，设置在该支承框架和该运动平台之间，用于驱动该运动平台沿正交的两个方向作二维运动；一电子控制系统，设置在该支承框架上，用于控制该双层双向运动机构的驱动动作；GPS接收机，其设置在该支承框架上；和一计算机系统，用于根据原始输入的运动信号，向该电子控制系统发出控制指令；同时，该计算机系统还获取该GPS接收机接收到的GPS信息；从而得出该GPS系统对该运动平台的二维运动的监测结果，并通过将该监测结果与运动平台的运动信号相比较，得出该GPS系统的监测精度。 Wed, 23 Jul 2008 00:00:00 GMT http://hdl.handle.net/10397/1784 Title: Methods and apparatus for ranking a node in a network having a plurality of interconnecting nodes<br/><br/>Authors: Jiang, Bin<br/><br/>Abstract: PageRank (PR) is used by web search engine Google in ranking individual web pages. However, it is known that this value is also easily manipulated by methods known as spoofing. Further, the calculation of PR will require iterative cycles of computations to achieve a "steady" value. This would mean that huge computation resources are required to obtain reasonably reliable PR values for various web pages. This invention provides relatively accurate and simple methods for ranking the importance of a node in a network. The web graph or the network is first represented by an incidence matrix or a representation matrix W. The matrix W is then self-multiplied to obtain flow matrix. The flow capacity, or the rank of each node, is then obtained from the flow matrix. Tue, 30 Mar 2010 00:00:00 GMT