结晶型四苄基伏格列波糖及其制备方法

    公开(公告)号:WO2008011791A1

    公开(公告)日:2008-01-31

    申请号:PCT/CN2007/001902

    申请日:2007-06-18

    Inventor: 刘立刚 李瑞文

    CPC classification number: C07C215/44

    Abstract: The present invention provides crystalline tetrabenzyl voglibose with the following physical properties: there are peaks at 2?=16.84±0.20°C, 18.99±0.20°and 24.11±0.20°of its Cu X-ray powder diffraction spectrum, and its melting point is 88.0°C~90.8°C. The present invention also provides a method for preparing the said crystal and a method of using the said crystal to prepare voglibose with high purity. Since the crystalline tetrabenzyl voglibose has higher purity and content than the oily tetrabenzyl voglibose, it can be stored and transported more easily, can be fetched and weighed more conveniently and when it is used to prepare voglibose, less impurity would be introduced or produced in the reaction.

    一种家庭基站间同步的获取与保持方法

    公开(公告)号:WO2012171339A1

    公开(公告)日:2012-12-20

    申请号:PCT/CN2012/070257

    申请日:2012-01-12

    CPC classification number: H04W56/001

    Abstract: 本发明公开了一种家庭基站间同步的获取与保持方法,包括:步骤S1,家庭基站HNB i 建立并维护邻节点列表,初始化各邻节点的参数;步骤S2,家庭基站HNB i 周期性地选择一个邻节点NodeB j 作为同步源;步骤S3,家庭基站HNB i 判断与同步源NodeB j 需要执行的同步类型;如果同步次数N j 等于0,家庭基站HNB i 与同步源NodeB j 进行完备同步过程,获得同步源NodeB j 的同步时间t ij ;如果同步次数N j 大于0,家庭基站HNB i 与同步源NodeB j 进行快速同步过程,获得同步源NodeB j 的同步时间t ij ;步骤S4,家庭基站HNBi更新自己的同步时间t i ,并修改同步次数N j 。本发明所述的家庭基站间同步的获取与保持方法占用资源少、速度快,无需中心节点控制,具有自组织、自优化的能力。

Patent Agency Ranking