Process for preparing a finely divided pulverous carotenoid retinoid or natural colourant preparation
    211.
    发明授权
    Process for preparing a finely divided pulverous carotenoid retinoid or natural colourant preparation 有权
    制备细碎的类胡萝卜素类维生素A或天然着色剂制剂的方法

    公开(公告)号:US06406735B2

    公开(公告)日:2002-06-18

    申请号:US09255010

    申请日:1999-02-22

    CPC classification number: C07C403/24 A23L5/44

    Abstract: A process for the preparation of a pulverous preparation having a finely divided carotenoid, retinoid or natural colorant is provided, which process comprises the steps of: a) forming a suspension of the active ingredient in a water-immiscible organic solvent optionally containing an antioxidant and/or an oil; b) feeding the suspension of step a) to a heat exchanger; c) heating the suspension to 100-250° C., whereby the residence time in the heat exchanger is less than 5 sec to provide a solution; d) rapidly mixing the solution of step c) with an aqueous solution of a swellable colloid and optionally a stabilizer such that the resulting mixture is at a temperature in the range of 20-100° C.; e) removing the organic solvent; and f) converting the dispersion of step e) into a pulverous preparation; where steps b) to f) are carried out continuously and in sequence.

    Abstract translation: 提供了一种制备具有细碎的类胡萝卜素,类视色素或天然色素的粉末制剂的方法,该方法包括以下步骤:a)将活性成分在任选含有抗氧化剂的水不混溶性有机溶剂中形成悬浮液, /或油; b)将步骤a)的悬浮液进料到热交换器; c)将悬浮液加热至100-250℃,由此在热交换器中的停留时间小于5秒以提供溶液; d)将步骤c)的溶液与可溶胀胶体和任选的稳定剂的水溶液快速混合,使得所得混合物的温度在20-100℃的范围内; e)除去有机溶剂; 和f)将步骤e)的分散体转化成粉末制剂;其中步骤b)至f)连续且顺序地进行。

    Method of searching for pilot signals
    212.
    发明授权
    Method of searching for pilot signals 有权
    搜索导频信号的方法

    公开(公告)号:US06389089B1

    公开(公告)日:2002-05-14

    申请号:US09539239

    申请日:2000-03-30

    CPC classification number: H04L27/2332 H04L7/042

    Abstract: A pulse train with known values and a known length contained in a signal is identified. The mathematical sign of the phase difference between successive samples of the signal is used to assess whether the transmitted pulse is a 1 or a 0, and with the sum of the pulses being determined in a window which is proportional to the length of the pulse train. The pulse train is considered as being identified at the time when the sum of the pulses in the search window exceeds a given threshold value.

    Abstract translation: 识别出包含在信号中的已知值和已知长度的脉冲串。 信号的连续样本之间的相位差的数学符号用于评估发射脉冲是1或0,并且脉冲总和在与脉冲串长度成比例的窗口中确定 。 在搜索窗口中的脉冲总和超过给定阈值时,脉冲串被认为是被识别的。

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