SYSTEM AND METHOD FOR DECODING AN AUDIO SIGNAL
    84.
    发明申请
    SYSTEM AND METHOD FOR DECODING AN AUDIO SIGNAL 有权
    用于解码音频信号的系统和方法

    公开(公告)号:US20070047638A1

    公开(公告)日:2007-03-01

    申请号:US11551581

    申请日:2006-10-20

    IPC分类号: H03K9/08 H04B14/04

    CPC分类号: G10L19/10

    摘要: A system and method are provided for decoding an audio signal. In one embodiment, a first pulse is identified with a predetermined relative duration with respect to a second pulse. A sampling frequency is then calculated based on such identification. In another embodiment, an audio signal is decoded utilizing a threshold. In still yet another embodiment, a decoder is provided for decoding an audio signal utilizing a clock that is independent of the audio signal.

    摘要翻译: 提供了一种用于对音频信号进行解码的系统和方法。 在一个实施例中,以相对于第二脉冲的预定相对持续时间来识别第一脉冲。 然后基于这种识别计算采样频率。 在另一个实施例中,利用阈值解码音频信号。 在又一个实施例中,提供了一种解码器,用于利用独立于音频信号的时钟对音频信号进行解码。

    Methods of manufacturing rotary drill bits
    87.
    发明授权
    Methods of manufacturing rotary drill bits 有权
    旋转钻头的制造方法

    公开(公告)号:US6148936A

    公开(公告)日:2000-11-21

    申请号:US244471

    申请日:1999-02-04

    CPC分类号: E21B10/46 B22F7/06

    摘要: A rotary drill bit is manufactured by a powder metallurgy process by placing a metal mandrel in a mold, packing the mold with particulate matrix-forming material, infiltrating the material with a molten binding alloy, and cooling the assembly to form a solid infiltrated matrix bonded to the mandrel. The mandrel comprises an outer part surrounded by the matrix-forming material and an inner part, secured to the outer part but out of contact with the matrix-forming material. The outer part of the mandrel is formed from a material having thermal characteristics close to those of the matrix, so as to reduce the tendency for the matrix to crack under thermal stress, while the inner part of the mandrel is formed from a precipitation-hardening material, the strength and hardness of which increases in the infiltration process and the subsequent heating/cooling cycle for brazing the cutters on to the drill bit. The threaded shank of the drill bit is formed directly on the inner part since it will have sufficient strength and hardness for this purpose.

    摘要翻译: 通过粉末冶金工艺制造旋转钻头,通过将金属心轴放置在模具中,用模具成型材料填充模具,用熔融粘结合金渗透材料,并冷却组件以形成固体渗透基质 到心轴。 心轴包括被基体形成材料包围的外部部分和固定到外部部分但与基质形成材料不接触的内部部分。 心轴的外部由具有接近于基体的热特性的材料形成,以便降低基体在热应力下裂纹的倾向,而心轴的内部部分由沉淀硬化形成 材料,其强度和硬度在渗透过程和随后的加热/冷却循环中增加,以将刀具钎焊到钻头上。 钻头的螺纹柄直接形成在内部,因为它将具有足够的强度和硬度。

    Thermally activated olefin metathesis catalyst precursor
    88.
    发明授权
    Thermally activated olefin metathesis catalyst precursor 失效
    热活化烯烃复分解催化剂前体

    公开(公告)号:US5639900A

    公开(公告)日:1997-06-17

    申请号:US175328

    申请日:1993-12-29

    摘要: Molybdenum and tungsten compounds that are useful as catalyst precursors in the metathesis of olefins have the general formula:M(Y) (OR.sup.2).sub.x (R.sup.3).sub.y (X).sub.z L.sub.swherein M is tungsten or molybdenum; Y is oxygen or NR.sup.1 ; R.sup.1, R.sup.2, and R.sup.3 are the same or different and are selected from alkyl, cycloalkyl, cycloalkenyl, polycycloalkyl, polycycloalkenyl, haloalkyl, haloaralkyl, substituted or unsubstituted aralkyl and aryl groups, and silicon-containing analogs thereof; L is a Lewis base; X is halogen; s is 0 or 1; x+y+z=4, and y.gtoreq.1, provided that when x is 2 or more, two OR.sup.2 groups can be replaced by a chelating ligand (OR.sup.2).sub.2.These compounds can be used for the metathesis of olefins in neat metathesizable olefin, as well as in solution, and require only the input of energy to be converted to active catalysts.

    摘要翻译: 在烯烃复分解中可用作催化剂前体的钼和钨化合物具有通式:M(Y)(OR2)x(R3)y(X)zLs,其中M是钨或钼; Y是氧或NR1; R 1,R 2和R 3相同或不同,并且选自烷基,环烷基,环烯基,多环烷基,多环烯基,卤代烷基,卤代烷基,取代或未取代的芳烷基和芳基及其含硅类似物; L是路易斯碱; X是卤素; s为0或1; x + y + z = 4,y> / = 1,条件是当x为2以上时,两个OR 2基团可以被螯合配体(OR2)2代替。 这些化合物可用于纯净的可再熔烯烃和溶液中的烯烃的复分解,并且仅需要将能量的输入转化为活性催化剂。

    Thermally activated olefin metathesis catalyst precursor
    89.
    发明授权
    Thermally activated olefin metathesis catalyst precursor 失效
    热活化烯烃复分解催化剂前体

    公开(公告)号:US5606085A

    公开(公告)日:1997-02-25

    申请号:US538990

    申请日:1995-10-05

    摘要: Molybdenum and tungsten compounds that are useful as catalyst precursors in the metathesis of olefins have the general formula:M(Y)(OR.sup.2).sub.x (R.sup.3).sub.y (X).sub.z L.sub.swherein M is tungsten or molybdenum; Y is oxygen or NR.sup.1 ; R.sup.1, R.sup.2, and R.sup.3 are the same or different and are selected from alkyl, cycloalkyl, cycloalkenyl, polycycloalkyl, polycycloalkenyl, haloalkyl, haloaralkyl, substituted or unsubstituted aralkyl and aryl groups, and silicon-containing analogs thereof; L is a Lewis base; X is halogen; s is 0 or 1; x+y+z=4, and y.gtoreq.1, provided that when x is 2 or more, two OR.sup.2 groups can be replaced by a chelating ligand (OR.sup.2).sub.2.These compounds can be used for the metathesis of olefins in neat metathesizable olefin, as well as in solution, and require only the input of energy to be converted to active catalysts.

    摘要翻译: 在烯烃复分解中可用作催化剂前体的钼和钨化合物具有通式:M(Y)(OR2)x(R3)y(X)zLs,其中M是钨或钼; Y是氧或NR1; R 1,R 2和R 3相同或不同,并且选自烷基,环烷基,环烯基,多环烷基,多环烯基,卤代烷基,卤代烷基,取代或未取代的芳烷基和芳基及其含硅类似物; L是路易斯碱; X是卤素; s为0或1; x + y + z = 4,y> / = 1,条件是当x为2以上时,两个OR 2基团可以被螯合配体(OR2)2代替。 这些化合物可用于纯净的可再熔烯烃和溶液中的烯烃的复分解,并且仅需要将能量的输入转化为活性催化剂。

    Polymerization feed composition comprising slow gel/cure systems based
on dialkylzinc
    90.
    发明授权
    Polymerization feed composition comprising slow gel/cure systems based on dialkylzinc 失效
    聚合进料组合物包含基于二烷基锌的缓慢凝胶/固化体系

    公开(公告)号:US5015705A

    公开(公告)日:1991-05-14

    申请号:US435211

    申请日:1989-11-13

    申请人: Andrew Bell

    发明人: Andrew Bell

    IPC分类号: C08G61/08

    CPC分类号: C08G61/08

    摘要: A process for preparing molded objects wherein a liquid reaction mass comprised of a metathesis polymerizable cycloolefin, a metathesis polymerization catalyst, a catalyst activator and a reaction rate moderator are charged to a mold wherein polymerization will take place, the improvement wherein said catalyst activator comprises a dialkylzinc compound. Significantly increased gel and cure times are obtained with the dialkylzinc compounds as compared to the use of aluminum alkyl activator compounds. The gel and cure times may be further controlled by the addition of a phenolic compound to the tungsten or molybdenum compound or by the addition of a Lewis base.

    摘要翻译: 一种制备模制物体的方法,其中将由易位可聚合的环烯烃,易位聚合催化剂,催化剂活化剂和反应速率调节剂组成的液体反应物质加入到其中进行聚合的模具中,其中所述催化剂活化剂包括 二烷基锌化合物。 与使用烷基铝活化剂化合物相比,用二烷基锌化合物获得显着增加的凝胶和固化时间。 可以通过向钨或钼化合物中加入酚类化合物或通过加入路易斯碱来进一步控制凝胶和固化时间。