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    • 91. 发明申请
    • Power-efficient sign extension for booth multiplication methods and systems
    • 用于展台乘法方法和系统的高效符号扩展
    • US20070192399A1
    • 2007-08-16
    • US11356359
    • 2006-02-15
    • Shankar KrithivasanChristopher KoobWilliam Anderson
    • Shankar KrithivasanChristopher KoobWilliam Anderson
    • G06F7/52
    • G06F7/5338G06F7/49994G06F7/5443
    • Techniques for the design and use of a digital signal processor, including processing transmissions in a communications (e.g., CDMA) system. Power-efficient sign extension for Booth multiplication processes involves applying a sign bit in a Booth multiplication tree. The sign bit allows the Booth multiplication process to perform a sign extension step. This further involves one-extending a predetermined partial product row of the Booth multiplication tree using a sign bit for preserving the correct sign of the predetermined partial product row. The process and system resolve the signal value of the sign bit by generating a sign-extension bit in the Booth multiplication tree. The sign-extension bit is positioned in a carry-out column to extend the product of the Booth multiplication process. Then, the method and system form a final product from the Booth multiplication tree by adding the carry-out value to the sign bit positioned at least a predetermined column of the Booth multiplication tree. The result is to effectively extend the sum component of the final product with the sign and zero-extending the carry component of the final product.
    • 用于设计和使用数字信号处理器的技术,包括处理通信(例如,CDMA)系统中的传输。 展位乘法过程的功率效率符号扩展涉及在展位乘法树中应用符号位。 符号位允许展位乘法过程执行符号扩展步骤。 这还涉及使用用于保留预定部分乘积行的正确符号的符号位来单扩展布乘除树的预定部分乘积行。 该过程和系统通过在展位乘法树中生成一个符号扩展位来解析符号位的信号值。 符号扩展位位于进位列中以扩展展位乘法过程的乘积。 然后,方法和系统通过将进位值添加到位于布斯乘积树的至少预定列的符号位,从布斯乘积树形成最终产品。 结果是有效地扩展最终产品的总和成分与符号和零扩展最终产品的进位组件。
    • 100. 发明申请
    • Swirl-enhanced aerodynamic fastener shield for turbomachine
    • 用于涡轮机的涡流增强型气动紧固件护罩
    • US20060056957A1
    • 2006-03-16
    • US10941214
    • 2004-09-15
    • Zhifeng DongMichael EpsteinWilliam AndersonJesse Senyo
    • Zhifeng DongMichael EpsteinWilliam AndersonJesse Senyo
    • F03B11/00
    • F01D25/243F01D11/001F05B2260/301F05D2260/97
    • A fastener shield for use in a fluid flow path within a gas turbine engine for reducing fluid drag and heating generated by fluid flow over a plurality of circumferentially spaced bolts. The fastener shield has a radially-extending, downstream-facing mounting flange with a plurality of circumferentially spaced bolt holes positioned to receive respective engine mounting bolts therethrough and to attach the mounting flange to elements of the turbine engine. A curved, upstream-facing fastener shield cover is positioned in spaced-apart relation to the mounting flange for at least partially covering and separating an exposed, upstream-facing portion of the bolts from the fluid flow to thereby reduce drag and consequent heating of the bolts. A plurality of closely spaced-apart, spirally-oriented channels are formed in the fastener shield cover for deflecting the fluid flow impinging on the fastener shield cover, thereby increasing the tangential velocity and lowering the relative temperature of the fluid flow.
    • 一种用于燃气涡轮发动机内的流体流动路径中的紧固件屏蔽件,用于减少在多个周向间隔开的螺栓上的流体流动产生的流体阻力和加热。 紧固件屏蔽件具有径向延伸的,面向下游的安装凸缘,多个周向间隔开的螺栓孔定位成接收相应的发动机安装螺栓,并将安装凸缘连接到涡轮发动机的元件。 弯曲的面向上游的紧固件屏蔽盖与安装凸缘间隔开地定位,用于至少部分地覆盖和分离出与流体流动的螺栓的暴露的面向上游的部分,从而减少了阻力并随之而来的加热 螺栓 在紧固件屏蔽罩中形成多个紧密间隔开的螺旋取向的通道,用于偏转撞击在紧固件屏蔽盖上的流体流,从而增加切向速度并降低流体流的相对温度。