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    • 44. 发明授权
    • Method and device for reducing friction on a navigating vehicle
    • 用于减少导航车辆摩擦的方法和装置
    • US5575232A
    • 1996-11-19
    • US360731
    • 1994-12-21
    • Hiroharu KatoYoshiaki Takahashi
    • Hiroharu KatoYoshiaki Takahashi
    • B63B1/38
    • B63B1/38B63B2001/387Y02T70/122
    • A method for reducing the frictional resistance of a navigating vehicle, and a method for generating micro-bubbles for reducing the friction of the navigating vehicle and an apparatus therefor. The friction reduction is achieved with the expenditure of a small amount of energy, thereby improving the overall energy efficiency for operating the ship. An air bubble/water mixture is injected towards the stern of the ship, at an inclined angle to the underwater surface, into a boundary layer formed in the vicinity of the underwater surface of the ship. The friction reduction is effectively performed because of the dynamic energy of the water, being a larger mass than air, enables the gas-including mixture to be injected over a longer distance into the boundary layer than in the case of air bubbles alone.
    • 一种用于降低导航车辆的摩擦阻力的方法,以及用于产生微气泡以减少导航车辆的摩擦力的方法及其装置。 摩擦减少是通过少量能源的消耗来实现的,从而提高了操作船舶的整体能源效率。 将气泡/水混合物以与水下表面倾斜的角度朝船的船尾喷射到形成在船舶的水下表面附近的边界层中。 由于水的动态能量,空气的质量比空气大,能够有效地进行摩擦减少,因此能够使含气体混合物比单独的气泡更长的距离喷入边界层。
    • 45. 发明授权
    • Double phase locked loop circuit
    • 双锁相环电路
    • US5329250A
    • 1994-07-12
    • US16247
    • 1993-02-11
    • Hideo ImaizumiYoshiaki Takahashi
    • Hideo ImaizumiYoshiaki Takahashi
    • H03D1/22H03L7/087H03L7/23H03L7/00
    • H03L7/235H03D1/2281H03L7/087H03D1/2254
    • A frequency of a first VCO (12) for generating a carrier of a video IF signal is set by using a frequency of a second VCO (15) as reference. The oscillation frequency of the second VCO (15) is controlled in response to the phase difference between an output signal of the first VCO (12) and the video IF signal. As a result, the output signal phase of the first VCO (12) is adjusted, and the output signal is locked to a carrier frequency of the video IF signal. Thus, the oscillation frequency of the first VCO (12) can be set automatically. Further, a signal for the phase difference between the output signal of the first VCO (12) and the video IF signal is also applied to the first VCO (12), thereby improving the stability of circuit operation.
    • 通过使用第二VCO(15)的频率作为参考来设置用于产生视频IF信号的载波的第一VCO(12)的频率。 响应于第一VCO(12)的输出信号和视频IF信号之间的相位差来控制第二VCO(15)的振荡频率。 结果,第一VCO(12)的输出信号相位被调整,并且输出信号被锁定到视频IF信号的载波频率。 因此,可以自动设定第一VCO(12)的振荡频率。 此外,用于第一VCO(12)的输出信号和视频IF信号之间的相位差的信号也被施加到第一VCO(12),从而提高电路操作的稳定性。