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88 条记录 (耗时 0.037 秒)

    HIGH SPEED PACKET CAPTURE
    41.
    发明申请
    HIGH SPEED PACKET CAPTURE 有权
    高速分组捕获

    公开(公告)号：US20110149959A1

    公开(公告)日：2011-06-23

    申请号：US13024923

    申请日：2011-02-10

    申请人： Weimin Liu ,  Erik de la Iglesia ,  William Deninger ,  Rick Lowe ,  Stephen Broeker

    发明人： Weimin Liu ,  Erik de la Iglesia ,  William Deninger ,  Rick Lowe ,  Stephen Broeker

    IPC分类号： H04L12/56

    CPC分类号： H04L1/0083 ,  G06F12/00 ,  H04L67/125 ,  H04L69/12 ,  H04L69/22

    摘要： Packets can be read from a network interface into an application using a single kernel copy. In one embodiment, the invention includes a receiver packet memory to store captured packets, and a network interface driver operating in a kernel of a device to read packets captured by network interface hardware into the kernel by storing captured packets in the receiver packet memory. Then, an application interface can expose the receiver packet memory to an application executing on the device by representing the receiver packet memory as a virtual file.

    摘要翻译： 可以使用单个内核副本将数据包从网络接口读取到应用程序中。 在一个实施例中，本发明包括用于存储捕获的分组的接收器分组存储器和在设备的内核中操作的网络接口驱动器，以通过将捕获的分组存储在接收器分组存储器中来将由网络接口​​硬件捕获的分组读取到内核中。 然后，应用接口可以通过将接收器分组存储器表示为虚拟文件来将接收器分组存储器暴露给在设备上执行的应用。

    Process for producing copper nanoparticles
    43.
    发明申请
    Process for producing copper nanoparticles 有权
    生产铜纳米粒子的方法

    公开(公告)号：US20060053972A1

    公开(公告)日：2006-03-16

    申请号：US10997220

    申请日：2004-11-23

    申请人： Weimin Liu ,  Xiaobo Wang ,  Singgou Fu

    发明人： Weimin Liu ,  Xiaobo Wang ,  Singgou Fu

    IPC分类号： B22F9/24

    CPC分类号： B22F1/0022 ,  B22F9/24 ,  B22F2998/00 ,  B82Y30/00 ,  C10M125/04 ,  C10M2201/05 ,  C10N2210/01 ,  C10N2220/08 ,  C10N2220/082 ,  Y10S977/896

    摘要： The present invention provides a process for producing copper nanoparticles, comprising steps of: a) reacting an aqueous solution containing a reductant with an aqueous solution of a copper salt while stirring for 1-8 min, wherein the reductant being one or more selected from a group consisting of hydrazine hydrate, sodium borohydride and sodium hypophosphite; b) adding an apolar organic solution containing the extracting agent and continuing the stirring for 0.5-1.5 hrs, said extracting agent being one or more selected from the group consisting of alkyl dithiocarbonic acid and salts thereof, O,O′-dialkyl dithiophosphoric acid and salts thereof, and dialkylamino dithioformic acid and salts and said apolar organic solution being one selected from the group consisting of benzene, toluene and straight or branched alkanes having 6-12 carbon atoms, wherein the alkyl having 6-20 carbon atoms; and c) post-treating the reaction product to obtain copper nanoparticles.

    摘要翻译： 本发明提供一种生产铜纳米颗粒的方法，包括以下步骤：a）在搅拌1-8分钟的同时使含有还原剂的水溶液与铜盐水溶液反应，其中还原剂是选自以下的一种或多种： 由水合肼，硼氢化钠和次磷酸钠组成的组; b）加入含有提取剂的非极性有机溶液并继续搅拌0.5-1.5小时，所述提取剂是选自烷基二硫代碳酸及其盐，O，O-二烷基二硫代磷酸和 其盐和二烷基氨基二硫代甲酸及其盐，所述非极性有机溶液选自苯，甲苯和具有6-12个碳原子的直链或支链烷烃，其中具有6-20个碳原子的烷基; 和c）后处理反应产物以获得铜纳米颗粒。

    System and method for reducing the effects of clipping in a DMT transceiver
    47.
    发明授权
    System and method for reducing the effects of clipping in a DMT transceiver 有权
    用于降低DMT收发器中限幅效果的系统和方法

    公开(公告)号：US06584160B1

    公开(公告)日：2003-06-24

    申请号：US09373841

    申请日：1999-08-13

    申请人： Daniel Amrany ,  Lujing Cai ,  Weimin Liu

    发明人： Daniel Amrany ,  Lujing Cai ,  Weimin Liu

    IPC分类号： H04L2549

    CPC分类号： H04L27/2614 ,  H04L27/2624

    摘要： The present invention is directed to a system and method for reducing the need to perform signal clipping in a DMT transmitter. In accordance with one aspect of the invention, a method performs an inverse Fourier Transform on the input to produce a time-domain, digital value to be transmitted to a remote receiver. The method then evaluates the magnitude of the digital value to determine whether the magnitude exceeds a threshold value. Then, the method alters the input and re-performs an inverse Fourier Transform on the altered input, only if the step of evaluating the magnitude determines that the magnitude of the digital value exceeds the threshold value.

    摘要翻译： 本发明涉及一种用于减少在DMT发射机中执行信号限幅的需要的系统和方法。 根据本发明的一个方面，一种方法在输入端执行逆傅里叶变换，以产生要传输到远程接收机的时域数字值。 该方法然后评估数字值的大小以确定幅度是否超过阈值。 然后，只有当评估幅度的步骤确定数字值的大小超过阈值时，该方法改变输入并对改变的输入重新执行逆傅里叶变换。

    System and method for echo cancellation over asymmetric spectra
    48.
    发明授权
    System and method for echo cancellation over asymmetric spectra 有权
    用于不对称光谱回波消除的系统和方法

    公开(公告)号：US06421377B1

    公开(公告)日：2002-07-16

    申请号：US09164552

    申请日：1998-10-01

    申请人： Ehud Langberg ,  Xueming Lin ,  Weimin Liu ,  Wenye Yang

    发明人： Ehud Langberg ,  Xueming Lin ,  Weimin Liu ,  Wenye Yang

    IPC分类号： H04B138

    CPC分类号： H04B3/23 ,  H04L27/2647

    摘要： The present invention generally relates to echo cancellation over an asymmetric transmission and receiving spectra. An apparatus is provided having a transmit path and a receive path, with an adaptive echo canceler disposed therebetween, for communicating data within a first bandwidth and a second bandwidth respectively. A first decimator is disposed between the transmit path and the echo canceler circuit and filters an incoming signal having a first sampling rate and emits a signal output at a second, reduced sampling rate. A second decimator is disposed along said receive path and filters an incoming signal and emits a signal output at a reduced sampling rate. An adder is disposed to subtract the output of the adaptive echo canceler from output of the second decimator to generate a received signal that is substantially free of echo.

    摘要翻译： 本发明一般涉及不对称传输和接收光谱的回波消除。 提供一种具有发送路径和接收路径的装置，其间设置有自适应回波消除器，用于分别在第一带宽和第二带宽内传送数据。 第一抽取器设置在发射路径和回波抵消器电路之间，并且对具有第一采样率的输入信号进行滤波，并以第二次降低的采样率发射信号输出。 沿着所述接收路径设置第二抽取器，并且对输入信号进行滤波并以降低的采样率发射信号输出。 设置加法器以从第二抽取器的输出中减去自适应回波消除器的输出，以产生基本上没有回波的接收信号。

    Method for processing speech signals as block floating point numbers in a CELP-based coder using a fixed point processor
    49.
    发明授权
    Method for processing speech signals as block floating point numbers in a CELP-based coder using a fixed point processor 失效
    在基于CELP的编码器中使用固定点处理器处理语音信号作为块浮点数的方法

    公开(公告)号：US5570454A

    公开(公告)日：1996-10-29

    申请号：US257831

    申请日：1994-06-09

    申请人： Weimin Liu

    发明人： Weimin Liu

    IPC分类号： G10L19/00 ,  G10L19/12 ,  G10L3/02 ,  H04B1/66

    CPC分类号： G10L19/125

    摘要： A method of encoding speech using a fixed-point processor. The method treats the signal as floating point, while operating on each sample of the signal as fixed point. The disclosed method achieves precision similar to that of conventional floating point and may be rapidly executed on a fixed point processor.

    摘要翻译： 一种使用定点处理器对语音进行编码的方法。 该方法将信号视为浮点，同时以信号的每个样本作为固定点进行操作。 所公开的方法实现与常规浮点类似的精度，并且可以在固定点处理器上快速执行。