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    • 51. 发明授权
    • Satellite selection
    • 卫星选择
    • US5777577A
    • 1998-07-07
    • US557081
    • 1995-12-06
    • Vinod Kumar
    • Vinod Kumar
    • H04B7/26H04B7/155H04B7/185H04B7/195
    • H04B7/18539
    • A device for selecting a primary satellite for a terminal (T) in a radiocommunication system having a number of moving satellites comprises measurement means for determining location information (D) on the basis of the position of the terminal with respect to each of the neighboring satellites (S1, S2, S3) on which it has becomed synchronized, estimation means for estimating the period of visibility of each of the satellites on the basis of the location information, and selection means for selecting the satellite (S2) having the longest estimated visibility.
    • PCT No.PCT / FR94 / 00669 Sec。 371 1995年12月6日第 102(e)日期1995年12月6日PCT提交1994年6月7日PCT公布。 第WO94 / 29969号公报 日期1994年12月22日在具有多个移动卫星的无线电通信系统中用于选择用于终端(T)的主卫星的设备包括:测量装置,用于基于终端相对于 每个相邻的卫星(S1,S2,S3)在其上同步,用于根据位置信息估计每个卫星的可见度周期的估计装置,以及用于选择卫星的选择装置(S2) 估计可见度最长。
    • 54. 发明授权
    • Handover method and device for a cellular mobile radio system
    • 蜂窝移动无线电系统的切换方法和设备
    • US5613203A
    • 1997-03-18
    • US329844
    • 1994-10-27
    • Pierre DupuyVinod Kumar
    • Pierre DupuyVinod Kumar
    • H04W36/18H04Q7/38
    • H04W36/18
    • In a method for handover between old and new cells of a time-division multiple access (TDMA) cellular mobile radio system a call between a mobile station and the system, initially effected via the old cell on a first channel defined by a first on air timeslot and a first set of frequencies comprising at least one frequency, is effected via the new cell on a new channel defined by a second on air timeslot and a second set of frequencies comprising at least one frequency. The first and second on air timeslots are identical, the first and second sets of frequencies are separate, and the method consists in transmitting, after verifying that the second on air timeslot identical to the first on air timeslot is available in the new cell, a frequency indication message indicating to the mobile station the second set of frequencies so that the mobile station continues the call using the same on air timeslot and the second set of frequencies.
    • 在时分多址(TDMA)蜂窝移动无线电系统的旧单元和新单元之间进行切换的方法中,移动站与系统之间的呼叫,首先通过由第一空中定义的第一信道上的旧小区进行 时隙和包括至少一个频率的第一组频率经由新小区在由第二上行时隙定义的新信道和包括至少一个频率的第二组频率上实现。 第一和第二空中时隙是相同的,第一和第二组频率是分开的,并且该方法包括在验证与新小区中可用第一空中时隙相同的第二空中时隙之后发送, 频率指示消息向移动台指示第二组频率,使得移动站在空中时隙和第二组频率上使用相同的继续呼叫。
    • 58. 发明授权
    • Single step green process for the preparation of substituted cinnamic esters with trans-selectivity
    • 用于制备具有反式选择性的取代肉桂酸酯的单步绿色方法
    • US07741508B2
    • 2010-06-22
    • US11728721
    • 2007-03-26
    • Arun Kumar SinhaAnuj SharmaAnand SwaroopVinod Kumar
    • Arun Kumar SinhaAnuj SharmaAnand SwaroopVinod Kumar
    • C07C69/76
    • C07C67/39C07C67/40C07C67/56Y02P20/582C07C69/734C07C69/618
    • The invention provides a green process for direct oxidation of a large number of substituted or unsubstituted cinnamaldehydes or cinnamyl alcohols into the corresponding alkyl or aryl cinnamates in one step. The process of the present invention is a convenient and efficient green process for the preparation of various aryl or alkyl cinnamates under conventional, microwave and ultrasound directly from cinnamaldehydes or cinnamyl alcohols in the presence of an oxidizing agent, catalyst and an alcohol, with or without an organic solvent. These esters are immensely important compounds in flavor, perfumery and pharmaceutical industries. There are several prior arts available for the preparation of cinnamic esters, but all of them suffer from deficiencies such as use of expensive reagents and catalysts, harsh reaction conditions, use of toxic chemicals and others. In contrast, the present methodology is extremely simple and involves reaction of the substrate with an oxidizing agent mixed with a homogeneous or heterogeneous catalyst and an alcohol with or without organic solvent by stirring at room temperature or refluxing or under microwave or ultrasound irradiation to get the requisite products.
    • 本发明提供了在一个步骤中将大量取代或未取代的肉桂醛或肉桂醇直接氧化成相应的烷基或芳基肉桂酸酯的绿色方法。 本发明的方法是在常规的微波和超声波下直接从肉桂醛或肉桂醇在氧化剂,催化剂和醇存在下制备各种芳基或烷基肉桂酸酯的方法和有效的绿色方法,具有或不具有 有机溶剂。 这些酯是风味,香料和制药行业中非常重要的化合物。 有几种现有技术可用于制备肉桂酯,但是它们都存在诸如使用昂贵的试剂和催化剂,苛刻的反应条件,使用有毒化学品等缺点。 相比之下,本方法非常简单,包括在室温或回流下或在微波或超声波照射下,通过在室温或回流下或在微波或超声波照射下搅拌,使底物与均匀或多相催化剂和醇混合的氧化剂反应,得到 必备产品。