Systems and methods of secure coding for physical layer communication channels
    33.
    发明授权
    Systems and methods of secure coding for physical layer communication channels 有权
    用于物理层通信信道的安全编码的系统和方法

    公开(公告)号:US08781125B2

    公开(公告)日:2014-07-15

    申请号:US12044411

    申请日:2008-03-07

    IPC分类号: H04K1/00 H04K1/02 H04L9/00

    摘要: Systems and methods of securely communicating from a sender device to a receiver device on a communication channel are disclosed. One disclosed method is for securely communicating from a sender device to a receiver device on a main channel when an eavesdropper device is listening on an eavesdropper channel. The main channel has an signal-to-noise ratio SNRM, and the eavesdropper channel has a signal-to-noise ratio SNRE. The method comprises encoding a message at a physical layer with a secure error correcting code (SECC) to produce an encoded message, and transmitting the encoded message on the main channel. The SECC has a set of defined characteristics such that when the eavesdropper device is more than a predetermined distance Z from the sender, at least a predefined fraction of the message is unreliable, where the predefined fraction of unreliable bits renders the eavesdropper unable to reliable decode messages on the main channel.

    摘要翻译: 公开了在通信信道上从发送方装置到接收装置的安全通信的系统和方法。 一种公开的方法是用于在窃听者设备正在窃听窃听频道上时从发送设备到主频道上的接收机设备进行安全通信。 主信道具有信噪比SNRM,窃听者信道具有信噪比SNRE。 该方法包括在具有安全纠错码(SECC)的物理层上编码消息以产生编码消息,并在主信道上发送编码消息。 SECC具有一组定义的特征,使得当窃听者设备超过来自发送者的预定距离Z时,消息的至少预定义的一部分不可靠,其中预定分数的不可靠比特使得窃听者不能可靠地解码 主通道上的消息。

    Top Access Leveler Assembly
    34.
    发明申请
    Top Access Leveler Assembly 失效
    顶部访问调平器组件

    公开(公告)号:US20110203495A1

    公开(公告)日:2011-08-25

    申请号:US12712896

    申请日:2010-02-25

    IPC分类号: F16M11/24 A47B9/00

    CPC分类号: A47B91/024

    摘要: A top access leveler assembly for leveling a table by use of a pedestal guide barrel, a leveling adjustment screw, and an adjustment driver. The leveling adjustment screw has a lower end with a foot pad and an upper end that can be rotated by the use of an adjustment driver. The adjustment driver is positioned within a cavity of the pedestal guide barrel and is further operated by a knob guide barrel that employs the use of alignment channels to allow the knob guide barrel to be twisted into a position where a spring biases the knob upward to allow ease of rotation. Once the knob is raised, the leveling adjustment screw is accessed from the top wherein the alignment channels allow rotation of the adjustment driver in either a clockwise or counterclockwise direction for use in extending the foot pad beneath the base of the table. The alignment guides further allow for the depressing of the guide barrel into the cavity and with a slight rotation places the guide barrel in a recessed position when not in use. The knob guide barrel includes a knob having an upper surface that is designed to be flush with an upper surface of the pedestal base when not in use and extends above the upper surface of the pedestal base to allow ease of rotation.

    摘要翻译: 一种用于通过使用基座引导筒,调平螺丝和调节驱动器来平整工作台的顶部接近调平器组件。 调平螺丝具有带脚垫的下端和可通过使用调节驱动器旋转的上端。 调节驱动器定位在基座引导筒的空腔内,并且由旋钮引导筒进一步操作,该推钮引导筒采用对准通道,以允许把手引导筒扭转到弹簧向上偏置旋钮的位置,以允许 易于旋转 一旦旋钮升起,调平调节螺钉从顶部进入,其中对准通道允许调节驱动器以顺时针或逆时针方向旋转,用于将脚垫延伸到桌子底部。 对准引导件进一步允许将引导筒压入空腔中并且稍微旋转时,在不使用时将引导筒放置在凹陷位置。 旋钮导向筒包括具有上表面的旋钮,该上表面被设计成在不使用时与底座基座的上表面齐平并且在基座底座的上表面上方延伸以允许容易旋转。

    Secure Communication Using Error Correction Codes
    35.
    发明申请
    Secure Communication Using Error Correction Codes 有权
    使用纠错码进行安全通信

    公开(公告)号:US20100275093A1

    公开(公告)日:2010-10-28

    申请号:US12765966

    申请日:2010-04-23

    IPC分类号: H03M13/05 G06F11/10

    摘要: Systems and methods for selecting a puncturing pattern for a low density parity check (LDPC) code are disclosed. One such method comprises: selecting a puncture pattern distribution for the LDPC code; calculating a security threshold and a reliability threshold for the LDPC, the LDPC having the selected puncture pattern distribution and also described by a degree distribution; storing the selected puncture pattern distribution responsive to a security gap for the LDPC being a lowest value encountered in any prior iterations; selecting another puncture pattern distribution for the LDPC code; and repeating the calculating, the storing, and the selecting another puncture pattern distribution steps.

    摘要翻译: 公开了用于选择用于低密度奇偶校验(LDPC)码的打孔模式的系统和方法。 一种这样的方法包括:选择用于LDPC码的穿孔图案分布; 计算LDPC的安全阈值和可靠性阈值,所述LDPC具有所选择的穿孔模式分布,并且还通过度分布来描述; 存储响应于所述LDPC的安全间隙的所选择的穿孔模式分布是在任何先前迭代中遇到的最低值; 选择用于LDPC码的另一穿孔图案分布; 并重复计算,存储和选择另一个穿刺图案分发步骤。

    Searching for lost item
    36.
    发明申请
    Searching for lost item 失效
    搜索丢失的物品

    公开(公告)号:US20050045823A1

    公开(公告)日:2005-03-03

    申请号:US10961851

    申请日:2004-10-08

    IPC分类号: A63B43/00 A63B43/06 A63B71/06

    摘要: An item that might be lost is provided with a badge featuring an array of glass beads. In seeking to retrieve such a lost item, an atmospheric-penetrating beam of laser is directed into the search area, and the signals from a reflectometer are monitored. The item having the badge of the array of glass beads is more easily retrievable when lost or mislaid than an item without such badge.

    摘要翻译: 可能会丢失的物品提供有一系列玻璃珠的徽章。 在寻找这样的丢失物品​​时,大气穿透的激光束被引导到搜索区域中,并且监测来自反射计的信号。 具有玻璃珠阵列徽章的物品比没有这种徽章的物品丢失或误入时更易于检索。

    Magnetic knife sheath
    37.
    发明授权
    Magnetic knife sheath 失效
    磁刀鞘

    公开(公告)号:US06457239B1

    公开(公告)日:2002-10-01

    申请号:US09732649

    申请日:2000-12-07

    IPC分类号: B26B306

    CPC分类号: B26B29/025

    摘要: The invention is a magnetic knife sheath that permits easy transport and protection of knives in a relatively small sheath. The sheath has two magnetically charged faces that attract each other, protecting and holding the knife blade securely between them.

    摘要翻译: 本发明是一种磁性刀鞘,其允许在相对小的护套中容易地输送和保护刀具。 护套具有彼此吸引的两个充磁面,保护并将刀片保持在它们之间。

    Process for the beneficiation of titaniferous ores
    38.
    发明授权
    Process for the beneficiation of titaniferous ores 失效
    含钛矿石选矿工艺

    公开(公告)号:US4058393A

    公开(公告)日:1977-11-15

    申请号:US589129

    申请日:1975-06-23

    摘要: The invention relates to the beneficiation of both natural and artificial titaniferous ores, specifically ilmenites by adding to the ores a fluoride, preferably a normally insoluble fluoride in an amount such that the percentage of fluorine ion relative to the titania values lies between 13% and 50%, adding to the mixture hydrochloric acid, the fluorine ions acting as an activating agent. After dissolution, the titanium is precipitated out, as a mixture of titanium dioxide, titanium oxy hydroxy fluoride and titanium oxy fluoride, the iron values largely remaining in solution.

    摘要翻译: 本发明涉及天然和人造含钛矿石,特别是钛铁矿的选矿,通过向矿石中加入氟化物,优选常规不溶性氟化物,其量使得氟离子相对于二氧化钛值的百分比在13%至50%之间 %,加入盐酸混合物中,氟离子充当活化剂。 溶解后,钛析出,作为二氧化钛,羟基氧化钛和氟氧化钛的混合物,铁值大部分留在溶液中。