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20 条记录 (耗时 0.021 秒)

    Usage of Poly-3-Hydroxybutyrates in Preparation of Beta-Lactam Compounds
    1.
    发明申请
    Usage of Poly-3-Hydroxybutyrates in Preparation of Beta-Lactam Compounds 有权
    聚-3-羟基丁酸酯在β-内酰胺化合物制备中的应用

    公开(公告)号：US20090088566A1

    公开(公告)日：2009-04-02

    申请号：US12280781

    申请日：2006-10-16

    申请人： Weichuan Lu ,  Qian Zhang ,  Xin Cheng

    发明人： Weichuan Lu ,  Qian Zhang ,  Xin Cheng

    IPC分类号： C07D205/08

    CPC分类号： C07D205/08 ,  C07F7/188

    摘要： The present invention discloses the usage of Poly-3-hydroxybutyrates P(3HB) in preparation of β-lactam compounds and the method for the preparation of β-lactam compounds of formula (I) using Poly-3-hydroxybutyrates P(3HB) as followed: wherein: R is R1, R2, R3 are lower linear or branched C1-C4 alkyl. It is convenient to synthesize the said compound of formula (I) with the present method. Compared with the previous ones, the present method has less steps and higher yields. Meanwhile, it also avoids the use of the reagents of the environmental for pollution and high cost, so as to reduce the cost and pollution

    摘要翻译： 本发明公开了聚-3-羟基丁酸酯P（3HB）在制备β-内酰胺化合物中的用途以及使用聚-3-羟基丁酸酯P（3HB）作为制备式（I）的β-内酰胺化合物的方法 其中：R为R 1，R 2，R 3为低级直链或支链C 1 -C 4烷基。 以本方法合成所述式（I）化合物是方便的。 与以前的方法相比，本方法具有较少的步骤和较高的收率。 同时也避免了环境污染物的使用和成本高昂，从而降低成本和污染

    Usage of poly-3-hydroxybutyrates in preparation of β-lactam compounds
    2.
    发明授权
    Usage of poly-3-hydroxybutyrates in preparation of β-lactam compounds 有权
    聚-3-羟基丁酸酯在制备β-内酰胺化合物中的用途

    公开(公告)号：US07985857B2

    公开(公告)日：2011-07-26

    申请号：US12280781

    申请日：2006-10-16

    申请人： Weichuan Lu ,  Qian Zhang ,  Xin Cheng

    发明人： Weichuan Lu ,  Qian Zhang ,  Xin Cheng

    IPC分类号： C07D205/08 ,  C07F7/18

    CPC分类号： C07D205/08 ,  C07F7/188

    摘要： A method for preparing compounds having the formula(I) by using P(3HB), wherein R is R1, R2, R3 are lower linear or branched C1-C4 alkyl, comprising the steps of: a: obtaining (3R)-3-RO—CH(CH3)CH2COOCH3 by pyrolysis of P(3HB) and protection; b: obtaining (3R)-3-RO—CH(CH3)CH2CHO by reduction of (3R)-3-RO—CH(CH3)CH2COOCH3 ; c: enolizing (3R)-3-RO—CH(CH3)CH2CHO and then reacting with chlorosulfonyl isocyanate, at last getting the final product by reduction; wherein (3R)-3-RO—CH(CH3)CH2CHO is enolized by reacting (3R)-3-RO—CH(CH3)CH2CHO with isopropenyl acetate and p-toluenesulfonic acid by heating under reflux.

    摘要翻译： 通过使用P（3HB）制备具有式（I）的化合物的方法，其中R为R 1，R 2，R 3为低级直链或支链C 1 -C 4烷基，包括以下步骤：a：获得（3R）-3- RO-CH（CH3）CH2COOCH3通过热解P（3HB）和保护; b：通过还原（3R）-3 -OR-CH（CH3）CH2COOCH3获得（3R）-3 -OR-CH（CH 3）CH 2 CHO; c：烯化（3R）-3 -OR-CH（CH 3）CH 2 CHO，然后与氯磺酰基异氰酸酯反应，最后通过还原得到最终产物; 其中通过在回流下加热使（3R）-3 -OR-CH（CH 3）CH 2 CHO与乙酸异丙烯酯和对甲苯磺酸反应来使（3R）-3 -OR-CH（CH 3）CH 2 CHO烯醇化。

    Wavelength-division-multiplexed optical transmission system with expanded bidirectional transmission capacity over a single fiber
    5.
    发明授权
    Wavelength-division-multiplexed optical transmission system with expanded bidirectional transmission capacity over a single fiber 失效
    波分复用光传输系统，通过单个光纤扩展双向传输容量

    公开(公告)号：US06400478B1

    公开(公告)日：2002-06-04

    申请号：US09054287

    申请日：1998-04-02

    申请人： Xin Cheng ,  Shouhua Huang

    发明人： Xin Cheng ,  Shouhua Huang

    IPC分类号： H04J1402

    CPC分类号： H04B10/2503 ,  H04J14/02

    摘要： The present invention provides an expandable and cost-effective high capacity optical communication system using wavelength-division-multiplexing, optical direction guide means and bidirectional transmission of data over an optical waveguide. The use of interleaved bidirectional data channels reduces the minimum spacing between data channels, permitting a greater number of channels over a single optical waveguide.

    摘要翻译： 本发明提供了一种使用波分复用，光学方向引导装置和通过光波导的数据的双向传输的可扩展和成本有效的大容量光通信系统。 使用交错的双向数据信道减少数据信道之间的最小间隔，允许在单个光波导上的更多数量的信道。

    Bias control and method for electro-optic modulators
    6.
    发明授权
    Bias control and method for electro-optic modulators 失效
    电光调制器的偏置控制和方法

    公开(公告)号：US5343324A

    公开(公告)日：1994-08-30

    申请号：US794719

    申请日：1991-11-15

    申请人： Phat Le ,  Xin Cheng

    发明人： Phat Le ,  Xin Cheng

    IPC分类号： G02F1/03 ,  G02F1/01 ,  G02F1/21 ,  H04B10/04

    CPC分类号： G02F1/0123 ,  G02F2001/212

    摘要： An electro-optical modulation system comprising an optical modulator for pulse-modulating an incoming light beam in response to a pulsed RF input signal and to a bias signal and for producing a pulse-modulated optical output which is characterized by a plurality of enveloped pulses, optical detector for producing an electrical signal which is representative of the output from the optical modulator, average detecting device for producing pulse envelope signals which are representative of the envelopes of the pulses, and a bias control circuit, using a plurality of pulse envelop signals, for producing the bias signal as a function of the pulse envelopes.

    摘要翻译： 一种电光调制系统，包括用于响应于脉冲RF输入信号和偏置信号脉冲调制入射光束并用于产生以多个包络脉冲为特征的脉冲调制光输出的光调制器， 用于产生表示来自光调制器的输出的电信号的光学检测器，用于产生表示脉冲包络的脉冲包络信号的平均检测装置，以及使用多个脉冲包络信号的偏置控制电路， 用于产生作为脉冲包络的函数的偏置信号。

    Dustproof lens and its module for LED road lamp
    7.
    发明申请
    Dustproof lens and its module for LED road lamp 有权
    LED路灯防尘透镜及其模块

    公开(公告)号：US20120099337A1

    公开(公告)日：2012-04-26

    申请号：US13339032

    申请日：2011-12-28

    申请人： Shikang Zhou ,  Xin Cheng ,  Mengsheng Wang ,  Yuexia Chen

    发明人： Shikang Zhou ,  Xin Cheng ,  Mengsheng Wang ,  Yuexia Chen

    IPC分类号： F21V5/04

    CPC分类号： D06F58/203 ,  D06F58/28 ,  D06F2058/2864 ,  D06F2058/2877

    摘要： A dustproof lens for an LED road lamp has an incident surface and an exit surface. The exit surface is flat. The incident surface is saddle-shaped and has a section in a shape of a concave curve along a road direction and in a shape of a convex curve vertically to the road direction. A lens module thereof has the dustproof lenses jointed with each other and has an integrally flat exit plane. The dustproof lens and its module, while meeting requirements in distributing lights for road lighting, adopt a flat surface for emitting lights, in such a manner that the lens is protected from dusts piled up thereon, can be cleaned simply, and is better fit for using. By accomplishing modularization of the lens module in production and assembly, a productive efficiency of lamps is greatly improved.

    摘要翻译： LED路灯的防尘透镜具有入射面和出射面。 出口表面平坦。 入射面为鞍状，具有沿道路方向的凹曲线形状和与道路方向垂直的凸曲线的形状。 其透镜模块具有彼此接合的防尘透镜，并且具有整体平坦的出射面。 防尘透镜及其模块在满足道路照明配光要求的同时，采用平面发光，防止透镜被灰尘堆积在其上，可以简单清洗，更适合 使用。 通过在生产和组装中实现镜头模块的模块化，大大提高了灯的生产效率。

    LUMINOUS SIGN WITH ENCAPSULATED LED CHIPS
    9.
    发明申请
    LUMINOUS SIGN WITH ENCAPSULATED LED CHIPS 审中-公开
    带有封装LED灯的LUMINOUS标志

    公开(公告)号：US20080086922A1

    公开(公告)日：2008-04-17

    申请号：US11852209

    申请日：2007-09-07

    申请人： Bishou Chen ,  Shikang Zhou ,  Xin Cheng ,  Bin Zhang ,  Sheng Li

    发明人： Bishou Chen ,  Shikang Zhou ,  Xin Cheng ,  Bin Zhang ,  Sheng Li

    IPC分类号： G09F13/00

    CPC分类号： G09F13/22 ,  G09F13/04 ,  G09F2013/1895

    摘要： A luminous sign using encapsulated LED chips with a neon light effect, comprising: a light guide, the front shape of which is the shape of a character with a selected width and height; an illumination channel, the shape of which is matched the shape of the light guide, the illumination channel and the light guide integrated into one piece; at least one PCB, the shape of which is matched the shape of the illumination channel, being placed underneath the illumination channel; a plurality of LED chips being spacedly disposed as a linear or strip array on the PCB by chip bonding method; the light guide, the illumination channel and the PCB form a closed light cavity, encapsulated with encapsulant doped with diffusion diluent; the encapsulated light guide, illumination channel and PCB are mounted on a supporting frame to form a character shape.

    摘要翻译： 使用具有霓虹灯效果的封装LED芯片的发光标志，包括：导光体，其前部形状是具有选定宽度和高度的字符的形状; 照明通道，其形状与导光体，照明通道和导光体的形状相一致; 至少一个PCB的形状与照明通道的形状相匹配，放置在照明通道下方; 多个LED芯片通过芯片接合方法间隔地设置在PCB上的线性或带状阵列上; 光导，照明通道和PCB形成封闭的光腔，用掺杂有扩散稀释剂的密封剂封装; 封装光导，照明通道和PCB安装在支撑框架上以形成字符形状。