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    • 3. 发明申请
    • SYSTEMS AND METHODS FOR DETERMINING LOCATION INFORMATION USING DUAL FILTERS
    • 使用双过滤器确定位置信息的系统和方法
    • US20090276155A1
    • 2009-11-05
    • US12113048
    • 2008-04-30
    • Mahesh JeerageFan Liu
    • Mahesh JeerageFan Liu
    • G01C21/00
    • G01S19/47G01S19/15G01S19/20G01S19/49
    • System and methods of increasing reliability of determined location information by using two integration filters are provided. An exemplary embodiment integrates inertial navigation system information and global navigation satellite system (GNSS) information in a real time Kalman filter; determines a real time location of the aircraft with the real time Kalman filter based upon the INS information and the GNSS information; delays the GNSS information by an interval; integrates the INS information and the delayed GNSS information in a delay Kalman filter; determines a predictive location of the aircraft with the delay Kalman filter based upon the INS information, the delayed GNSS information, and the interval; and in response to an inaccuracy of the real time location determined from the real time Kalman filter, selects the predictive location determined from the delay Kalman filter as a new real time location of the aircraft.
    • 提供了通过使用两个集成滤波器提高确定的位置信息的可靠性的系统和方法。 一个示例性实施例将惯性导航系统信息和全球导航卫星系统(GNSS)信息集成在实时卡尔曼滤波器中; 基于INS信息和GNSS信息,用实时卡尔曼滤波器确定飞机的实时位置; 将GNSS信息延迟一段时间; 在延迟卡尔曼滤波器中整合INS信息和延迟的GNSS信息; 基于INS信息,延迟的GNSS信息和间隔来确定具有延迟卡尔曼滤波器的飞行器的预测位置; 并且响应于从实时卡尔曼滤波器确定的实时位置的不精确性,选择从延迟卡尔曼滤波器确定的预测位置作为飞行器的新的实时位置。
    • 4. 发明授权
    • Systems and methods for determining location information using dual filters
    • 使用双重滤波器确定位置信息的系统和方法
    • US08260552B2
    • 2012-09-04
    • US12113048
    • 2008-04-30
    • Mahesh JeerageFan Liu
    • Mahesh JeerageFan Liu
    • G01C21/00
    • G01S19/47G01S19/15G01S19/20G01S19/49
    • System and methods of increasing reliability of determined location information by using two integration filters are provided. An exemplary embodiment integrates inertial navigation system information and global navigation satellite system (GNSS) information in a real time Kalman filter; determines a real time location of the aircraft with the real time Kalman filter based upon the INS information and the GNSS information; delays the GNSS information by an interval; integrates the INS information and the delayed GNSS information in a delay Kalman filter; determines a predictive location of the aircraft with the delay Kalman filter based upon the INS information, the delayed GNSS information, and the interval; and in response to an inaccuracy of the real time location determined from the real time Kalman filter, selects the predictive location determined from the delay Kalman filter as a new real time location of the aircraft.
    • 提供了通过使用两个集成滤波器提高确定的位置信息的可靠性的系统和方法。 一个示例性实施例将惯性导航系统信息和全球导航卫星系统(GNSS)信息集成在实时卡尔曼滤波器中; 基于INS信息和GNSS信息,用实时卡尔曼滤波器确定飞机的实时位置; 将GNSS信息延迟一段时间; 在延迟卡尔曼滤波器中整合INS信息和延迟的GNSS信息; 基于INS信息,延迟的GNSS信息和间隔来确定具有延迟卡尔曼滤波器的飞行器的预测位置; 并且响应于从实时卡尔曼滤波器确定的实时位置的不精确性,选择从延迟卡尔曼滤波器确定的预测位置作为飞行器的新的实时位置。
    • 5. 发明申请
    • METHOD AND APPARATUS FOR READING DATA FROM A PROTOCOL STACK OF TRANSMISSION CONTROL PROTOCOL/INTERNET PROTOCOL
    • 从传输控制协议/互联网协议协议栈读取数据的方法和装置
    • US20110274118A1
    • 2011-11-10
    • US13142406
    • 2009-12-24
    • Fan Liu
    • Fan Liu
    • H04L12/56
    • H04L69/163H04L69/165H04L69/24
    • A method and device for accessing data through a stack of Transmission Control Protocol and Internetwork Protocols (TCP/IP). The method includes: obtaining an identifier that designates a plurality of UDP data packets in the User Datagram Protocol (UDP) of the TCP/IP stack; obtaining a total length of UDP data packets to be accessed; obtaining data in the protocol stack according the total length of foregoing designated UDP data packets; copying the designated UDP data packets to a user state. The method uses the identifier to access a plurality of UDP data packets and use the length to determine the number of accessible UDP data packets whereby it can access a plurality of UDP data packet each time. Moreover, it reduces the frequency of system calls when accessing an equal number of UDP data packets and shortens the time of system calls. Therefore, it improves the network I/O capacity.
    • 一种用于通过传输控制协议和互联网协议(TCP / IP)的堆栈访问数据的方法和设备。 该方法包括:获取在TCP / IP栈的用户数据报协议(UDP)中指定多个UDP数据分组的标识符; 获取要访问的UDP数据包的总长度; 根据上述指定的UDP数据包的总长度获取协议栈中的数据; 将指定的UDP数据包复制到用户状态。 该方法使用标识符来访问多个UDP数据分组,并使用该长度来确定可访问的UDP数据分组的数量,从而每次可以访问多个UDP数据分组。 此外,它在访问相同数量的UDP数据包时可以减少系统调用的频率,并缩短系统调用的时间。 因此,提高了网络I / O容量。
    • 9. 发明申请
    • METHOD AND SYSTEM FOR DETECTING A FINGER CONTACT ON A TOUCHPAD
    • 用于检测触摸板上的手指触点的方法和系统
    • US20110185310A1
    • 2011-07-28
    • US13004441
    • 2011-01-11
    • Xiaoning LIUFan LiuBangjun HeYun Yang
    • Xiaoning LIUFan LiuBangjun HeYun Yang
    • G06F3/048
    • G06F3/04883G06F3/04855
    • A method for executing a scroll control operation on a touchpad comprises receiving a first contact signal induced by a first contact with a first section of the touchpad, receiving a second contact signal induced by a second contact with a second section of the touchpad, the first section and second section being predefined in a scrolling region on the touchpad, recording a first direction from the first contact to the second contact, and a first distance between the first section and the second section and outputting a scroll control signal to execute a scroll operation, the scroll control signal including information of the first direction and first distance.
    • 一种用于在触摸板上执行滚动控制操作的方法包括:接收由与触摸板的第一部分的第一接触引起的第一接触信号,接收由与触摸板的第二部分的第二接触引起的第二接触信号,第一接触信号 在所述触摸板上的滚动区域中预定义所述第一部分和第二部分,记录从所述第一触点到所述第二触点的第一方向以及所述第一部分与所述第二部分之间的第一距离,并输出滚动控制信号以执行滚动操作 所述滚动控制信号包括所述第一方向和第一距离的信息。
    • 10. 发明申请
    • METHOD TO IMPROVE LEVELING PERFORMANCE IN NAVIGATION SYSTEMS
    • 提高航行系统性能的方法
    • US20130103344A1
    • 2013-04-25
    • US13464298
    • 2012-05-04
    • Charles T. ByeFan LiuKenneth Steven Morgan
    • Charles T. ByeFan LiuKenneth Steven Morgan
    • G06F15/00
    • G01C21/16
    • An attitude estimator system is provided. The attitude estimator system includes a navigation system, a Kalman filter, and a form observations module. The navigation system receives input from a first accelerometer and gyroscope, a second accelerometer and gyroscope, and a third accelerometer and gyroscope. The form observations module receives input from at least one high performance accelerometer and/or gyroscope; forms and outputs at least one of velocity-derived observations and attitude-derived observations. The Kalman filter processes by at least one of: inputting the velocity-derived observations formed in the form observations module, rotating the velocity-derived observation into a sensor-frame, and zeroing gains associated with at least one low performance accelerometer and/or gyroscope; or inputting the attitude-derived observations that are based on output from at least one of the first high performance accelerometer, the first high performance gyroscope, and the second high performance accelerometer.
    • 提供了一种姿态估计系统。 态度估计器系统包括导航系统,卡尔曼滤波器和表单观察模块。 导航系统接收来自第一加速度计和陀螺仪,第二加速度计和陀螺仪以及第三加速度计和陀螺仪的输入。 表单观察模块从至少一个高性能加速度计和/或陀螺仪接收输入; 形成并输出速度衍生观测值和姿态衍生观测值中的至少一个。 卡尔曼滤波器通过以下中的至少一个进行处理:输入在形式观察模块中形成的速度导出观测值,将速度导出的观测转换成传感器框架,以及归零与至少一个低性能加速度计和/或陀螺仪相关联的增益 ; 或输入基于来自第一高性能加速度计,第一高性能陀螺仪和第二高性能加速度计中的至少一个的输出的姿态衍生观测值。