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329 条记录 (耗时 0.026 秒)

    Path search method for CDMA communication systems
    102.
    发明申请
    Path search method for CDMA communication systems 有权

    公开(公告)号：US20060067384A1

    公开(公告)日：2006-03-30

    申请号：US10955747

    申请日：2004-09-30

    申请人： Yan Zhang ,  Jingdong Lin

    发明人： Yan Zhang ,  Jingdong Lin

    IPC分类号： H04B1/707

    CPC分类号： H04B1/7117 ,  H04B1/7095 ,  H04B2201/70707

    摘要： The embodiments of this invention relate generally to wireless telecommunication systems and, more particularly, to spread spectrum code division multiple access communication systems that employ a pilot-channel for path search and acquisition and for allocating fingers of a multifinger correlator, such as one found in a RAKE receiver. While the path search is an important part of the RAKE process, conventional path search methods require a large storage space for implementing the required correlation algorithms. One of the advantages of this invention is the noticeable reduction of the required storage space.

    Low complexity encoder and decoder
    104.
    发明授权
    Low complexity encoder and decoder 失效
    低复杂度的编码器和解码器

    公开(公告)号：US06950979B2

    公开(公告)日：2005-09-27

    申请号：US10393706

    申请日：2003-03-20

    申请人： Yan Zhang ,  Tibor Boros

    发明人： Yan Zhang ,  Tibor Boros

    IPC分类号： H03M13/19 ,  H03M13/00

    CPC分类号： H03M13/19

    摘要： In one embodiment of the present invention, the efficiency of an encoder can be maintained while reducing the complexity of a decoder. In one embodiment, the invention includes a communication system in which a transmitter has a pipelined encoder that includes a controller that does not access a look-up table to encode a block of data bits into a binary codeword, and in which a receiver has a decoder to receive the binary codeword after transmission through a communications medium, and to correct an error in the binary codeword introduced during transmission without using a look-up table.

    摘要翻译： 在本发明的一个实施例中，可以保持编码器的效率，同时降低解码器的复杂性。 在一个实施例中，本发明包括通信系统，其中发射机具有流水线编码器，其包括不访问查找表以将数据比特块编码为二进制码字的控制器，并且其中接收机具有 解码器，用于在通过通信介质传输之后接收二进制码字，并且校正在传输期间引入的二进制码字中的错误，而不使用查找表。

    Carbon monoxide clean-up in a PEM fuel cell system
    105.
    发明申请
    Carbon monoxide clean-up in a PEM fuel cell system 有权
    一氧化碳在PEM燃料电池系统中清理

    公开(公告)号：US20050193627A1

    公开(公告)日：2005-09-08

    申请号：US10793491

    申请日：2004-03-04

    申请人： Yan Zhang ,  John Ruhl ,  Annette Brenner ,  Craig Gittleman

    发明人： Yan Zhang ,  John Ruhl ,  Annette Brenner ,  Craig Gittleman

    IPC分类号： B01J8/00 ,  H01M8/06

    CPC分类号： C01B3/48 ,  C01B3/382 ,  C01B2203/0244 ,  C01B2203/0283 ,  C01B2203/0288 ,  C01B2203/043 ,  C01B2203/0445 ,  C01B2203/066 ,  C01B2203/0894 ,  Y02C10/06

    摘要： A fuel processor system contains an autothermal reactor (ATR) that produces a hydrogen-rich first gas stream containing carbon monoxide. Downstream of the ATR, a pressure swing adsorber produces a second hydrogen-rich gas stream containing 5 ppm carbon monoxide or more. Downstream of the PSA, there is a methanation reactor sized to reduce the CO level of the second stream below 5 ppm. A method of operating of proton exchange membrane fuel cell stack involves cooling the methanator output and feeding it into the stack as an anode fuel.

    摘要翻译： 燃料处理器系统包含产生含有一氧化碳的富氢第一气流的自热反应器（ATR）。 在ATR的下游，变压吸附器产生含有5ppm一氧化碳或更多的第二富氢气流。 在PSA的下游，存在一个甲烷化反应器，其尺寸适于将第二流的CO水平降低至低于5ppm。 质子交换膜燃料电池堆的操作方法包括冷却甲烷输出并将其作为阳极燃料进料到堆中。

    Acousto-optic theta modulation-based analog-to-digital converter
    108.
    发明授权
    Acousto-optic theta modulation-based analog-to-digital converter 失效
    基于声光θ调制的模数转换器

    公开(公告)号：US5142285A

    公开(公告)日：1992-08-25

    申请号：US654471

    申请日：1991-02-13

    申请人： Yao Li ,  Yan Zhang

    发明人： Yao Li ,  Yan Zhang

    IPC分类号： G02F7/00 ,  H03M1/22 ,  H03M1/32

    CPC分类号： G02F7/00 ,  H03M1/32

    摘要： An optical theta-modulation based analog-to-digital converter having an acousto-optic deflector and an analog-to-digital conversion mask, for fast and flexible analog-to-digital conversion. The acousto-optic deflector deflects an optical beam at an angle corresponding to an input voltage signal having an analog value. The analog-to-digital conversion mask converts the deflected optical beam into N masked optical signals which each corresponds to a respective bit of a digital value representing the analog value of the input signal. Each optical signal is detected by a photodetector and converted into an output voltage signal by a comparator.

    摘要翻译： 具有声光偏转器和模数转换掩模的基于光学θ调制的模数转换器，用于快速和灵活的模数转换。 声光偏转器以对应于具有模拟值的输入电压信号的角度偏转光束。 模数转换掩模将偏转的光束转换成N个掩蔽的光信号，每个对应于表示输入信号的模拟值的数字值的相应位。 每个光信号由光电检测器检测并由比较器转换成输出电压信号。

    Methods and systems for aircraft collision avoidance
    109.
    发明授权
    Methods and systems for aircraft collision avoidance 有权

    公开(公告)号：US11161611B2

    公开(公告)日：2021-11-02

    申请号：US16815832

    申请日：2020-03-11

    申请人： Yan Zhang ,  Gerard Fairley

    发明人： Yan Zhang ,  Gerard Fairley

    IPC分类号： B64C39/02 ,  G08G1/16 ,  G08G5/00 ,  G05D1/00 ,  G08G5/04 ,  G05D1/10

    摘要： A system for aircraft collision avoidance includes a first aircraft, the first aircraft configured to detecting at least a projected flight path of at least a second aircraft, determine, as a function of the at least a projected flight path, that the first aircraft is on a collision course with the at least a second aircraft, select a collision avoidance maneuver, the collision avoidance maneuver including at least a flight path for the first aircraft and at least a flight path for the at least a second aircraft, and transmit the collision avoidance maneuver to the at least a second aircraft.

    Intelligent pipeline small leaks and thefts detection methods and systems
    110.
    发明授权
    Intelligent pipeline small leaks and thefts detection methods and systems 有权

    公开(公告)号：US10309861B2

    公开(公告)日：2019-06-04

    申请号：US15443658

    申请日：2017-02-27

    申请人： Yan Zhang

    发明人： Yan Zhang

    IPC分类号： G01M3/24 ,  G01M3/28

    摘要： Methods and systems are provided for intelligently detecting pipeline small leaks and thefts. In the Energy Flow Line Method, measured changes in flow data at both ends of the pipeline are monitored and analyzed to detect a leak or a theft. The energy wave front speed and the unsteady flow mathematical model of the subject pipeline is used to calculate leak details. In the Filtered Pressure Waves Method, the measured pressure data at both ends of the pipeline is monitored and analyzed. Pressure waves that do not originate at the ends of the pipeline are selected. Two travelling time windows are applied to those candidates, and the candidates are processed within each window. Leaks, thefts and their details are obtained if the detected leak locations meet the criteria. The Enhanced Filtered Pressure Waves Method, provides the leaked amount and verifies the leak and the leak location to avoid false alarms. An index formed with measured parameters is monitored and the unsteady flow model of the subject pipeline is utilized.