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191 条记录 (耗时 0.024 秒)

    Synthesis of 1-acetoxy-2-methylnaphthalene
    32.
    发明授权
    Synthesis of 1-acetoxy-2-methylnaphthalene 失效
    1-乙酰氧基-2-甲基萘的合成

    公开(公告)号：US5670698A

    公开(公告)日：1997-09-23

    申请号：US699259

    申请日：1996-08-19

    申请人： Mu-Ill Lim ,  Yuh-Guo Pan ,  Linas Stasaitis ,  James Anderson

    发明人： Mu-Ill Lim ,  Yuh-Guo Pan ,  Linas Stasaitis ,  James Anderson

    IPC分类号： C07C67/297 ,  C07C69/157 ,  C07C69/00

    CPC分类号： C07C67/297 ,  C07C67/18

    摘要： A one pot process is provided in which a Mannich base of the formula 5 is reacted with acetic anhydride to produce a diacetate derivative. Without any intermediate isolation, the derivative is hydrogenated to produce a reaction mixture containing 1-acetoxy-2-methylnaphthalene which is readily precipitated from the reaction mixture by addition of water. ##STR1##

    摘要翻译： 提供一锅法，其中式5的曼尼希碱与乙酸酐反应以产生二乙酸酯衍生物。 在不进行任何中间分离的情况下，将衍生物氢化以产生含有1-乙酰氧基-2-甲基萘的反应混合物，其通过加入水容易地从反应混合物中沉淀。 5

    Rotary lawn mower accessories
    33.
    发明授权
    Rotary lawn mower accessories 失效
    旋转割草机配件

    公开(公告)号：US4715173A

    公开(公告)日：1987-12-29

    申请号：US741111

    申请日：1985-06-04

    申请人： James Anderson

    发明人： James Anderson

    IPC分类号： A01D34/73 ,  A01D42/00 ,  A01D55/00

    CPC分类号： A01D42/00 ,  A01D34/733 ,  A01D2101/00 ,  Y10S56/09

    摘要： The invention provides accessories for use with a rotary lawn mower in which the conventional bar having oppositely facing cutting edges is replaced with an accessory bar to which a variety of grass grooming accessories can be easily attached. The accessory bar can accommodate replaceable grass cutting elements, grass mulching elements and lawn power raking elements. The elements can be replaced without removing the accessory bar from the mower and are balanced to reduce vibration. Two of the accessories have cutting edges which are factory sharpened on relatively low cost elements, and thus can be discarded when blunt and replaced with new, low cost factory sharpened elements, thus maintaining balance. The rake accessory has a variation which permits a fine adjustment of vertical height of the rake above the lawn, to accommodate lawn mowers having coarse or no height adjustment.

    摘要翻译： 本发明提供了一种用于旋转割草机的附件，其中具有相对面切割刃的常规杆被替换为可容易地附着各种草地修饰附件的附件杆。 附件酒吧可以容纳可更换的草切割元素，草地覆盖元素和草坪动力耙子。 可以更换元件，而不需要从割草机上取下附件杆，并平衡以减少振动。 其中两个配件具有在相对较低成本的元件上工厂削尖的切削刃，因此可以在钝的时候被丢弃，并用新的低成本的工厂磨削元件代替，从而保持平衡。 耙子配件具有允许对草坪上方的耙的垂直高度进行微调的变化，以适应具有粗糙或没有高度调节的割草机。

    Photographic distortion method and apparatus
    34.
    发明授权
    Photographic distortion method and apparatus 失效
    摄影失真方法和装置

    公开(公告)号：US4390272A

    公开(公告)日：1983-06-28

    申请号：US288049

    申请日：1981-07-29

    申请人： James Anderson

    发明人： James Anderson

    IPC分类号： G03B27/10

    CPC分类号： G03B27/10

    摘要： A method and apparatus for obtaining a distorted photographic reproduction from a negative photographic image, in which a sheet of photosensitive printing paper is attached to a planar surface of a table, the image negative is placed over the paper and a slitted mask is placed over the image negative. The image negative and the mask are moved laterally relative to one another and to the paper while the mask is exposed to a light source. To obtain a circular reproduction the mask is held stationary and the printing paper is rotated about an axis intersecting the slit while the image negative is moved laterally with respect to the slit.

    摘要翻译： 一种用于从负照相图像获得失真的照相再现的方法和装置，其中将一张光敏打印纸附接到桌子的平面表面，将图像负片放置在纸上，并将切割的掩模放置在 图像为负。 当掩模暴露于光源时，图像负片和掩模相对于彼此和纸张横向移动。 为了获得圆形再现，掩模保持静止，并且打印纸围绕与狭缝相交的轴线旋转，同时图像负片相对于狭缝横向移动。

    Analog power amplifier predistortion methods and apparatus
    36.
    发明授权
    Analog power amplifier predistortion methods and apparatus 有权
    模拟功率放大器预失真方法和装置

    公开(公告)号：US08693962B2

    公开(公告)日：2014-04-08

    申请号：US12203064

    申请日：2008-09-02

    申请人： Dongtai Liu ,  Dali Yang ,  James Anderson

    发明人： Dongtai Liu ,  Dali Yang ,  James Anderson

    IPC分类号： H04B1/04

    CPC分类号： H04B1/0475 ,  H03F1/3247 ,  H03F3/19 ,  H03F3/21 ,  H03F3/24 ,  H03F2200/451 ,  H03F2200/57 ,  H03F2201/3215 ,  H03F2201/3233 ,  H04B2001/0425 ,  Y02D70/00

    摘要： An embodiment of the invention is a predistortion approach to linearize a power amplifier by using one or more analog multiplier(s) and a DSP-based processor. For the analog embodiment, the inherent nature of the analog circuitries allows digital predistortion processing structured directly at the RF band, and enables a single power amplifier to support multi-modulation schemes, multi-carriers and multi-channels. As a result, the predistortion architecture is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems. The wireless system performance can be improved and upgraded just by using the new PA module rather than change or rebuild new subsystem in existing base station. The analog embodiment can also mix and match its analog multipliers with other analog components such as phase splitters, phase shifters, attenuators, filters, couplers, mixers, low-noise amplifiers, buffers, envelope detectors, and etc., to provide additional features.

    摘要翻译： 本发明的一个实施例是通过使用一个或多个模拟乘法器和基于DSP的处理器对功率放大器进行线性化的预失真方法。 对于模拟实施例，模拟电路的固有特性允许直接在RF频带处构成的数字预失真处理，并且使单个功率放大器能够支持多调制方案，多载波和多信道。 因此，预失真架构特别适用于诸如基站，中继器和室内信号覆盖系统之类的无线传输系统。 无线系统性能可以通过使用新的PA模块来改进和升级，而不是改变或重建现有基站中的新子系统。 模拟实施例还可以将其模拟乘法器与诸如相位分离器，移相器，衰减器，滤波器，耦合器，混频器，低噪声放大器，缓冲器，包络检测器等的其它模拟组件混合并匹配，以提供附加特征。

    Reduced Foreshortening Stent With Bio-Resorbable Fibers
    37.
    发明申请
    Reduced Foreshortening Stent With Bio-Resorbable Fibers 审中-公开
    减少生物可吸收纤维的缩短支架

    公开(公告)号：US20120303110A1

    公开(公告)日：2012-11-29

    申请号：US13474245

    申请日：2012-05-17

    申请人： James Anderson

    发明人： James Anderson

    IPC分类号： A61F2/90 ,  A61F2/84

    CPC分类号： A61F2/958 ,  A61F2002/9583 ,  A61F2210/0004 ,  F04C2270/0421

    摘要： A device and method for reducing stent foreshortening are provided herein. The device includes a balloon and stent thereon. The stent has a first end portion and a second end portion and bio-resorbable fibers disposed over at least a portion of the first end portion and the second end portion. The bio-resorbable fibers over the end portions prevent the ends of the stent from prematurely expanding, thereby reducing stent foreshortening.

    摘要翻译： 本文提供了一种用于减少支架缩短的装置和方法。 该装置在其上包括气球和支架。 支架具有设置在第一端部和第二端部的至少一部分上的第一端部和第二端部以及生物可再吸收纤维。 在端部之上的生物可吸收纤维阻止支架的端部过早膨胀，从而减少支架缩短。