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    • 2. 发明授权
    • Time-resolved diffusion tomographic 2D and 3D imaging in highly
scattering turbid media
    • 在高散射混浊介质中的时间分辨扩散断层扫描2D和3D成像
    • US6108576A
    • 2000-08-22
    • US797163
    • 1997-02-10
    • Robert R. AlfanoWei CaiSwapan K. Gayen
    • Robert R. AlfanoWei CaiSwapan K. Gayen
    • A61B5/00G01N21/47A61B6/00
    • A61B5/0073A61B5/7257G01N21/4795A61B5/0091
    • A method for imaging objects in highly scattering turbid media. According to one embodiment of the invention, the method involves using a plurality of intersecting source/detectors sets and time-resolving equipment to generate a plurality of time-resolved intensity curves for the diffusive component of light emergent from the medium. For each of the curves, the intensities at a plurality of times are then inputted into the following inverse reconstruction algorithm to form an image of the medium: wherein W is a matrix relating output at source and detector positions r.sub.s and r.sub.d, at time t, to position r, .LAMBDA. is a regularization matrix, chosen for convenience to be diagonal, but selected in a way related to the ratio of the noise, to fluctuations in the absorption (or diffusion) X.sub.j that we are trying to determine:.LAMBDA..sub.ij =.lambda..sub.j .delta..sub.ij with .lambda..sub.j = / Y is the data collected at the detectors, and X.sup.k is the kth iterate toward the desired absorption information. An algorithm, which combines a two dimensional (2D) matrix inversion with a one-dimensional (1D) Fourier transform inversion is used to obtain images of three dimensional hidden objects in turbid scattering media.
    • 一种用于在高散射混浊介质中成像物体的方法。 根据本发明的一个实施例,该方法包括使用多个相交的源/检测器组和时间分辨设备来产生用于从介质出射的光的漫射分量的多个时间分辨强度曲线。 对于每个曲线,多个时间的强度然后被输入到以下逆重建算法中以形成介质的图像:其中W是在时间t处将源的输出和检测器位置rs和rd相关联的矩阵, 为了定位r,LAMBDA是一个正则化矩阵,为方便起见选择为对角线,但以与噪声的比值与我们试图确定的吸收(或扩散)Xj的波动相关的方式进行选择: LAMBDA ij = lambda j delta ij,其中λj = / Y是在检测器处收集的数据,Xk是朝向期望的吸收信息的第k次迭代。 将二维(2D)矩阵求逆与一维(1D)傅里叶变换反演相结合的算法用于获取浑浊散射介质中三维隐藏物体的图像。
    • 3. 发明授权
    • Time-resolved diffusion tomographic 2D and 3D imaging in highly
scattering turbid media
    • 在高散射混浊介质中的时间分辨扩散断层扫描2D和3D成像
    • US5931789A
    • 1999-08-03
    • US797028
    • 1997-02-07
    • Robert R. AlfanoWei CaiFeng LiuMelvin LaxBidyut B. Das
    • Robert R. AlfanoWei CaiFeng LiuMelvin LaxBidyut B. Das
    • A61B5/00G01N21/47
    • A61B5/7257A61B5/0073G01N21/4795A61B5/0091
    • A method for imaging objects in highly scattering turbid media. According to one embodiment of the invention, the method involves using a plurality of intersecting source/detectors sets and time-resolving equipment to generate a plurality of time-resolved intensity curves for the diffusive component of light emergent from the medium. For each of the curves, the intensities at a plurality of times are then inputted into the following inverse reconstruction algorithm to form an image of the medium: ##EQU1## wherein W is a matrix relating output at source and detector positions r.sub.s and r.sub.d, at time t, to position r, .LAMBDA. is a regularization matrix, chosen for convenience to be diagonal, but selected in a way related to the ratio of the noise, to fluctuations in the absorption (or diffusion) X.sub.j that we are trying to determine:.LAMBDA..sub.ij =.lambda..sub.j .delta..sub.ij with .lambda..sub.j = / Y is the data collected at the detectors, and X.sup.k is the kth iterate toward the desired absoption information. An algorithm, which combines a two dimensional (2D) matrix inversion with a one-dimensional (1D) Fourier transform inversion is used to obtain images of three dimensional hidden objects in turbid scattering media.
    • 一种用于在高散射混浊介质中成像物体的方法。 根据本发明的一个实施例,该方法包括使用多个相交的源/检测器组和时间分辨设备来产生用于从介质出射的光的漫射分量的多个时间分辨强度曲线。 对于每个曲线,多个时间的强度然后被输入到以下逆重建算法中以形成介质的图像:其中W是在时间t处将源的输出和检测器位置rs和rd相关联的矩阵, 为了定位r,LAMBDA是一个正则化矩阵,为方便起见选择为对角线,但以与噪声的比值与我们试图确定的吸收(或扩散)Xj的波动相关的方式进行选择: LAMBDA ij = lambda j delta ij,其中λj = / Y是在检测器处收集的数据,Xk是朝向期望的吸收信息的第k次迭代。 将二维(2D)矩阵求逆与一维(1D)傅里叶变换反演相结合的算法用于获取浑浊散射介质中三维隐藏物体的图像。
    • 4. 发明授权
    • Time-resolved diffusion tomographic imaging in highly scattering turbid
media
    • 在高散射混浊介质中的时间分辨扩散断层成像
    • US5813988A
    • 1998-09-29
    • US618471
    • 1996-03-18
    • Robert R. AlfanoWei CaiFeng LiuMelvin LaxBidyut B. Das
    • Robert R. AlfanoWei CaiFeng LiuMelvin LaxBidyut B. Das
    • A61B5/00G01N21/47
    • A61B5/0073G01N21/4795A61B5/0091
    • A method for imaging objects in highly scattering turbid media. According to one embodiment of the invention, the method involves using a plurality of intersecting source/detectors sets and time-resolving equipment to generate a plurality of time-resolved intensity curves for the diffusive component of light emergent from the medium. For each of the curves, the intensities at a plurality of times are then inputted into the following inverse reconstruction algorithm to form an image of the medium: X.sup.(k+1).spsp.T =�Y.sup.T W+X.sup.(k).spsp.T .LAMBDA.!�W.sup.T W+.LAMBDA.!.sup.-1 wherein W is a matrix relating output at detector position r.sub.d, at time t, to source at position r.sub.s, .LAMBDA. is a regularization matrix, chosen for convenience to be diagonal, but selected in a way related to the ratio of the noise, to fluctuations in the absorption (or diffusion) X.sub.j that we are trying to determine: .LAMBDA..sub.ij =.lambda..sub.j .delta..sub.ij with .lambda..sub.j = / Here Y is the data collected at the detectors, and X.sup.k is the kth iterate toward the desired absoption information.
    • 一种用于在高散射混浊介质中成像物体的方法。 根据本发明的一个实施例,该方法包括使用多个相交的源/检测器组和时间分辨设备来产生用于从介质出射的光的漫射分量的多个时间分辨强度曲线。 对于每个曲线,多个时间的强度然后被输入到以下逆重建算法中以形成介质的图像:X(k + 1)T = [YTW + X(k)T LAMBDA] [WTW + LAMBDA] -1其中W是将检测器位置rd,时间t处的输出与位置rs处的源相关的矩阵,LAMBDA是为了方便对角线选择的正则化矩阵,但是以与 噪声,nn>我们试图确定的吸收(或扩散)Xj的波动:LAMBDA ij = lambda j delta ij与lambda j = / 这里Y是在 检测器和Xk是朝向期望的吸收信息的第k次迭代。
    • 8. 发明授权
    • Apparatus and method for testing number of turns on coil
    • 用于测试线圈匝数的装置和方法
    • US08653850B2
    • 2014-02-18
    • US13320212
    • 2009-05-19
    • Wei CaiWeimin ZhangJiangtao Wang
    • Wei CaiWeimin ZhangJiangtao Wang
    • G01R31/06H02P1/00
    • G01R29/20G01R31/346
    • An apparatus for testing number of turns, used for testing the number of turns of a winding coil on an electrical machine stator with concentrated winding, comprising: a base (6); a rod-shaped rotor bracket (4) around one end of which an excitation coil (1) is wound and around the other end of which a standard coil (2) is wound; a joining member for joining the base (6) with the rotor bracket (4) so that the base (6) and the rotor bracket (4) can rotate relative to each other, wherein the plane of the base (6) is parallel to the rotor bracket (4); a fixing member for fixing the electrical machine stator (5) with concentrated winding to the base (6) so as to make the stator (5) concentric and coplanar with the rotor bracket (4); a galvanometer (17) connected to the standard coil (2), which is connected to the tested coil (3) of the stator (5) in reverse polarity to form a loop during testing. Also provided is a method for using the apparatus to test the number of turns. The apparatus for testing number of turns has a simple structure, is of great utility and can test the number of turns of a winding coil on an electrical machine stator with concentrated winding directly.
    • 一种用于测试匝数的装置,用于测试具有集中绕组的电机定子上的绕组线圈的匝数,包括:基座(6); 杆状转子支架(4)围绕其一端缠绕励磁线圈(1)并绕其另一端缠绕有标准线圈(2)的一端; 用于将所述基座(6)与所述转子支架(4)接合的接合构件,使得所述基座(6)和所述转子支架(4)能够相对于彼此旋转,其中所述基座(6)的平面平行于 转子支架(4); 固定构件,用于将具有集中绕组的电机定子(5)固定到基座(6),以使定子(5)与转子支架(4)同心并共面; 连接到标准线圈(2)的电流计(17),其以相反极性连接到定子(5)的测试线圈(3),以在测试期间形成环路。 还提供了一种使用该装置来测试匝数的方法。 用于测试匝数的装置结构简单,具有很大的实用性,可以直接测试集中绕组的电机定子上绕组线圈的匝数。