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    • 1. 发明授权
    • Phenoxymethylpyrimidine derivative and use thereof as herbicide
    • 苯氧甲基嘧啶衍生物及其作为除草剂的用途
    • US5468721A
    • 1995-11-21
    • US140062
    • 1993-10-29
    • Norio SasakiSachio KudoMichi WatanabeKeiji EndoShinji Kawaguchi
    • Norio SasakiSachio KudoMichi WatanabeKeiji EndoShinji Kawaguchi
    • A01N43/54C07D239/52C07D409/12
    • C07D409/12A01N43/54C07D239/52
    • A phenoxymethylpyrimidine derivative represented by the general formula (1) ##STR1## and a herbicide containing it as an effective ingredient. This compound has a high weed killing effect, a wide weed killing spectrum and high safety on crops, and is thus useful as a herbicide.whereinX denotes a halogen atom, a lower alkyl group, a lower alkoxy group, a lower acyloxy group or a nitro group,n denotes an integer of 0, 1 or 2,Y denotes a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group, a substituted lower alkyl group, a substituted lower alkenyl group, a substituted lower alkynyl group, an alkali metal atom, an alkaline earth metal atom or an ammonium cation optionally substituted by alkyl group(s), andR.sup.1 and R.sup.2 each independently denote a lower alkyl group.
    • PCT No.PCT / JP92 / 00560 Sec。 371日期:1993年10月29日 102(e)日期1993年10月29日PCT提交1992年4月28日PCT公布。 WO92 / 19603 PCT出版物 1992年12月11日,由通式(1)表示的苯氧基甲基嘧啶衍生物(1)和含有它作为有效成分的除草剂。 这种化合物具有高杂草杀灭效果,宽杂草杀虫谱和作物高安全性,因此可用作除草剂。 其中X表示卤素原子,低级烷基,低级烷氧基,低级酰氧基或硝基,n表示0,1或2的整数,Y表示氢原子,低级烷基,低级 烯基,低级炔基,取代的低级烷基,取代的低级烯基,取代的低级炔基,碱金属原子,碱土金属原子或任选被烷基取代的铵阳离子,以及 R1和R2各自独立地表示低级烷基。
    • 9. 发明授权
    • Adaptive digital filter
    • 自适应数字滤波器
    • US4660163A
    • 1987-04-21
    • US570634
    • 1984-01-13
    • Atsushi FukasawaKenichiro HosodaRyoichi MiyamotoHiromi AndoShinji Kawaguchi
    • Atsushi FukasawaKenichiro HosodaRyoichi MiyamotoHiromi AndoShinji Kawaguchi
    • H03M3/04G06F7/38
    • H03M3/042
    • An adaptive digital filter which is used, for instance, for a prediction filter in an ADPCM modulator and an ADPCM demodulator, for providing stable operation and minimum phase shift response has been found. The filter (FIG. 4, FIG. 5) has three parallel branches (A,B,C), two (A,B) of them have a plurality of series connected non-recursive filter elements (A.sub.1 -A.sub.n, B.sub.1 -B.sub.n) each of which has degree not larger than three relating to an operator (Z.sup.-1), and third branch (C) is merely a conductive line. Tap coefficients (c.sub.1, c.sub.2, . . . , d.sub.1, d.sub.2, . . . ) of non-recursive filter elements change according to solutions of the transfer function of the filter. A numerator and/or a denominator of the transfer function of the present filter is a Chebychev polynominal relating to an operator (Z.sup.-1), and has a zero point and/or a pole. The solutions (w.sub.i, v.sub.i) of a numerator and a denominator locate alternately on a unit circle (FIG. 6) on a Z.sup.-1 plane. When solutions of the transfer function do not locate alternately on said unit circle, tap coefficients (c.sub.1, c.sub.2, . . . , d.sub.1, d.sub.2, . . . ) are not updated, since non-alternate solutions do not assure stable operation and/or minimum phase shift response of the filter.
    • 已经发现了用于例如用于ADPCM调制器中的预测滤波器和用于提供稳定操作和最小相移响应的ADPCM解调器的自适应数字滤波器。 滤波器(图4,图5)具有三个平行分支(A,B,C),它们中的两个(A,B)具有多个串联连接的非递归滤波器元件(A1-An,B1-Bn (Z-1),第三分支(C)仅仅是导线。 非递归滤波器元件的抽头系数(c1,c2,...,d1,d2,...)根据滤波器的传递函数的解决方案而变化。 本滤波器的传递函数的分子和/或分母是与运算符(Z-1)相关的切比西夫多项式,具有零点和/或极点。 分子和分母的解(wi,vi)交替地位于Z-1平面上的单位圆(图6)上。 当传递函数的解不会交替地定位在所述单位圆上时,抽头系数(c1,c2,...,d1,d2,...)不更新,因为非替代解不能保证稳定的操作和/ 或滤波器的最小相移响应。