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    • 1. 发明授权
    • Turbine blades and methods of manufacturing
    • 涡轮叶片及制造方法
    • US08206108B2
    • 2012-06-26
    • US11953489
    • 2007-12-10
    • Ardeshir RiahiKin PoonDavid ChouMalak F. Malak
    • Ardeshir RiahiKin PoonDavid ChouMalak F. Malak
    • F01D5/18
    • F01D5/147F01D5/18F01D5/20F05D2230/10F05D2230/211F05D2240/307Y02T50/676
    • A turbine blade includes a convex suction side wall, a concave pressure side wall, a tip wall, an internal cooling circuit, and a plurality of tip edge channels. The tip wall is recessed from a first tip edge of the suction side wall and a second tip edge of the concave pressure side wall to define a suction side wall tip section and a pressure side wall tip section, and the suction side wall tip section is shorter than the pressure side wall tip section. The internal cooling circuit is formed at least partially between the convex suction side wall, the concave pressure side wall, and the tip wall. The plurality of tip edge channels formed through the first tip edge of the convex suction side wall extend to the internal cooling circuit. Methods of manufacturing turbine blades are also provided.
    • 涡轮叶片包括凸吸入侧壁,凹压侧壁,尖端壁,内部冷却回路和多个尖端边缘通道。 顶壁从吸力侧壁的第一顶端边缘和凹压侧壁的第二顶端边缘凹入,以限定吸入侧壁顶端部分和压力侧壁顶端部分,并且吸力侧壁顶端部分是 比压力侧壁末端部分短。 内部冷却回路至少部分形成在凸吸入侧壁,凹压侧壁与顶壁之间。 通过凸形吸入侧壁的第一顶端边缘形成的多个尖端边缘通道延伸到内部冷却回路。 还提供制造涡轮叶片的方法。
    • 3. 发明授权
    • Equalization for DMT and OFDM communication systems
    • DMT和OFDM通信系统的均衡
    • US07433398B2
    • 2008-10-07
    • US10889530
    • 2004-07-12
    • Fa-Long LuoDavid Chou
    • Fa-Long LuoDavid Chou
    • H03K5/159
    • H04L25/03012H04L25/03159H04L2025/03414H04L2025/03445H04L2025/03522
    • The invention provides a DMT or OFDM equalization system that deals with each tone not only separately, but also globally, which provides better overall performance. In the inventive system, only M+T variables are required to be determined, where M is the number of tones and T represents the number of SIRF taps. The invention defines a matrix R, in which optimal coefficients are found as the eigenvector corresponding to the smallest eigenvalue of the matrix R. The dynamic range of all variables is limited in a system in accordance with the present invention, which provides ease of hardware implementation. Furthermore, the inventive system retains the advantages of per-tone equalization by providing a smoother signal-to-noise ratio (SNR) distribution function versus synchronization delay. In addition, no effort is wasted on the equalization of unused tones, because it is unnecessary to determine the coefficients for unused tones.
    • 本发明提供了一种DMT或OFDM均衡系统,其不仅分别地,而且全局地处理每个音调,这提供了更好的整体性能。 在本发明的系统中,仅需要确定M + T个变量,其中M是音调的数量,T表示SIRF抽头的数量。 本发明定义了矩阵R,其中找到最佳系数作为与矩阵R的最小特征值对应的特征向量。所有变量的动态范围在根据本发明的系统中受到限制,这提供了硬件实现的容易性 。 此外,本发明的系统通过相对于同步延迟提供更平滑的信噪比(SNR)分布函数来保留每个音调均衡的优点。 此外,由于不需要确定未使用音调的系数,因此不会浪费对未使用音调的均衡。