公开(公告)号：US07576604B2

公开(公告)日：2009-08-18

申请号：US11611410

申请日：2006-12-15

申请人： Bin Xu

发明人： Bin Xu

IPC分类号： H03F3/38

CPC分类号： H03F3/217

摘要： An all-digital class-D audio amplifier and method of digitizing an analog signal comprises a pulse-width modulation (PWM) wave generator for generating a PWM wave; an interpolator for receiving an input audio signal, up-sample the input audio signal; and down-sample the input audio signal to a PWM wave switching frequency; an audio speaker for broadcasting an amplified version of the input audio signal; a pair of MOSFETs driven by the PWM wave and the input supply voltage, wherein the pair of MOSFETs transmit the amplified version of the input audio signal to the audio speaker; a natural-sampling and pre-distortion circuit adapted to (i) generate a pre-distorted natural-sampling frequency point for the PWM wave switching frequency, and (ii) account for digitized power supply ripples for an input supply voltage used to drive the audio speaker; and an analog-to-digital converter (ADC) adapted to digitize the power supply ripples or distortion.

摘要翻译： 全数字D类音频放大器和模拟信号的数字化方法包括用于产生PWM波的脉冲宽度调制（PWM）波发生器; 用于接收输入音频信号的内插器，对输入音频信号进行上采样; 并将输入音频信号下采样为PWM波切换频率; 音频扬声器，用于广播输入音频信号的放大版本; 由PWM波驱动的一对MOSFET和输入电源电压，其中所述一对MOSFET将所述输入音频信号的放大版本传输到所述音频扬声器; 自适应采样和预失真电路，其适于（i）产生用于PWM波开关频率的预失真自然采样频率点，以及（ii）考虑用于驱动所述PWM波开关频率的输入电源电压的数字化电源波纹 音箱 以及适于数字化电源波纹或失真的模拟 - 数字转换器（ADC）。

公开(公告)号：US07484259B2

公开(公告)日：2009-02-03

申请号：US11916107

申请日：2006-05-22

申请人： Bin Xu

发明人： Bin Xu

IPC分类号： E01D19/06

CPC分类号： E01D19/06

摘要： A large resisting distortion and modularized comb-type bridge expansion joint, comprises at least two modules located parallel in the direction of a bridge's width, and each module includes a fixed comb plate (2) and a movable comb plate (1), which are respectively disposed on girders located at the two sides of the bridge expansion joint, said movable comb plate (1) crosses over the bridge expansion joint, both of said fixed comb plate (2) and said movable comb plate (1) have a plurality of comb teeth (22), (11) at their opposite ends, and the comb teeth (11) of said movable comb plate (1) interdigitate with the comb teeth (22) of said fixed comb plate (2), characterized in that the root of said movable comb plate (1) rotatablely joints with a seat (5) fixed on the girders, and the comb teeth (22) of said fixed comb plate (2) rotatablely joints with the root of said fixed comb plate (2), while, the middle of the comb teeth (22) of said fixed comb plate (2) is movably set on an underlay (6) fixed on the girders and can be shifted transversely relative to the underlay (6). In this invention, when the girders have transverse shift under the effect of the wind or other external forces, the movable comb plate and its comb teeth will rotate correspondingly and the comb teeth of the fixed comb plate will also rotate correspondingly, then the broken of the comb teeth will be avoided.

摘要翻译： 一种大的阻抗变形和模块化的梳式桥式膨胀接头，包括沿桥梁宽度方向平行布置的至少两个模块，每个模块包括固定梳板（2）和可动梳板（1），它们是 分别设置在位于桥梁伸缩接头两侧的桁条上，所述可动梳板（1）跨越所述桥接伸缩接头，所述固定梳板（2）和所述可动梳板（1）都具有多个 梳齿（22），（11）在其相对端，所述可动梳板（1）的梳齿（11）与所述固定梳板（2）的梳齿（22）相互配合，其特征在于， 所述可动梳板（1）的根部可旋转地与固定在桁架上的座（5）接合，并且所述固定梳板（2）的梳齿（22）可旋转地与所述固定梳板（2）的根部接合， 同时，所述固定梳板（2）的梳齿（22）的中间可移动地设置在底部上 y（6）固定在桁架上，并可相对于底垫（6）横向移动。 在本发明中，当桁梁在风力或其他外力作用下具有横向移动时，可动梳板及其梳齿将相应旋转，固定梳板的梳齿也将相应地旋转， 梳齿将被避免。

公开(公告)号：US20070115870A1

公开(公告)日：2007-05-24

申请号：US10558829

申请日：2004-05-28

申请人： Bin Xu ,  Fangfu Guo ,  Xinxi Diao ,  Huangqiu Ye

发明人： Bin Xu ,  Fangfu Guo ,  Xinxi Diao ,  Huangqiu Ye

IPC分类号： H04B7/185

CPC分类号： H04B1/7113 ,  H04B1/7117

摘要： The present invention relates to a method and apparatus of precise first-path detection in CDMA mobile communications systems, comprising the steps of: a. calculating the noise threshold for the first-path detection according to the multi-path profile; b. judging whether there is a maximum point exceeding the noise threshold in the multi-path profile, if yes, carrying out side-lobe suppression at this maximum point and obtaining the candidate first path; otherwise, setting the flag of no first path existing, and exiting the entire process of first-path detection; c. judging according to the location of the candidate first path whether the first path is ambiguous, if yes, carrying out correction of first-path ambiguity, obtaining the corrected location of final first path, and exiting the entire first-path detection process; otherwise, outputting the location of candidate first path as the location of final first path. The apparatus in accordance with this invention comprises at least a module for noise threshold calculation, a module for side-lobe suppression, and a module for first-path ambiguity detection and correction.

摘要翻译： 本发明涉及CDMA移动通信系统中的精确第一路径检测的方法和装置，包括以下步骤：a。 根据多路径轮廓计算第一路径检测的噪声阈值; b。 判断在多路径分布中是否存在超过噪声阈值的最大点，如果是，则在该最大点执行旁瓣抑制并获得候选的第一路径; 否则，设置不存在第一条路径的标志，并退出整个第一路径检测过程; C。 根据候选第一路径的位置判断第一路径是否不明确，如果是，执行第一路径模糊度的校正，获得最终第一路径的校正位置，并退出整个第一路径检测过程; 否则，输出候选第一路径的位置作为最终第一路径的位置。 根据本发明的装置至少包括用于噪声阈值计算的模块，用于旁瓣抑制的模块和用于第一路径模糊度检测和校正的模块。

公开(公告)号：US20060146062A1

公开(公告)日：2006-07-06

申请号：US11320672

申请日：2005-12-30

申请人： Seokcheol Kee ,  Bin Xu ,  Yangsheng Wang ,  Ziqing Li ,  Xiangsheng Huang ,  Xiaouxu Zhou

发明人： Seokcheol Kee ,  Bin Xu ,  Yangsheng Wang ,  Ziqing Li ,  Xiangsheng Huang ,  Xiaouxu Zhou

IPC分类号： G09G5/00

CPC分类号： G06K9/00275 ,  G06K9/6212

摘要： A method and an apparatus for constructing classifiers based on face texture information and a method and an apparatus for recognizing a face using statistical features of texture information. The method of constructing classifiers based on face texture information includes: cropping a first face image and a second face image from two different images; dividing the first face image and the second face image into partial images of predetermined sizes and cropping first partial images corresponding to the first image and second partial images corresponding to the second image; extracting first texture information corresponding to texture information of each of the first partial images and second texture information corresponding to texture information of each of the second partial images; checking similarities between the texture information of partial images of the first face image and that of the corresponding partial images of the second face image; and constructing weak classifiers for recognizing an identity of the face based on partial images according to the checked similarities.

摘要翻译： 一种基于面部纹理信息构建分类器的方法和装置，以及使用纹理信息的统计特征来识别面部的方法和装置。 基于面部纹理信息构建分类器的方法包括：从两个不同的图像裁剪第一个面部图像和第二个面部图像; 将所述第一面部图像和所述第二面部图像分割成预定尺寸的部分图像，并且对应于所述第一图像的裁剪第一部分图像和对应于所述第二图像的所述第二部分图像; 提取与所述第一部分图像中的每一个的纹理信息相对应的第一纹理信息和对应于每个第二部分图像的纹理信息的第二纹理信息; 检查第一面部图像的部分图像的纹理信息与第二面部图像的相应部分图像的纹理信息之间的相似度; 以及构建弱分类器，用于根据所检查的相似度，基于部分图像来识别面部的身份。