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    • 27. 发明授权
    • Creating indexes for databases
    • 创建数据库的索引
    • US08892566B2
    • 2014-11-18
    • US13073377
    • 2011-03-28
    • Qi ChenHai Feng LiGuang Zhou Zhang
    • Qi ChenHai Feng LiGuang Zhou Zhang
    • G06F17/30
    • G06F17/30321
    • An index is created for a database by selecting at least one column of a database table as a basis to create the index, generating at least one index of a tree structure according to the at least one column, where a pointer stored in a leaf node of the at least one index is null. In an example embodiment, a value to a pointer is stored in a leaf node according to an intermediate result in response to the intermediate result being generated, where the pointer stored in the leaf node points to a data page storing the intermediate result. The created index can be reused and the intermediate result can be effectively used, such that the efficiency of database operation is improved.
    • 通过选择数据库表的至少一列作为创建索引的基础来为数据库创建索引,根据至少一列生成树结构的至少一个索引,其中存储在叶节点中的指针 的至少一个索引为空。 在示例实施例中,响应于生成的中间结果,根据中间结果将指针的值存储在叶节点中,其中存储在叶节点中的指针指向存储中间结果的数据页。 创建的索引可以重用,中间结果可以有效地使用,从而提高数据库操作的效率。
    • 28. 发明授权
    • Switch control system
    • 开关控制系统
    • US08751051B2
    • 2014-06-10
    • US13211582
    • 2011-08-17
    • Xiang YuXiao-Yong MaQi Chen
    • Xiang YuXiao-Yong MaQi Chen
    • G05D9/00
    • G05D9/12
    • A switch control system for controlling an electrically conductive fluid supply to a tank, includes a detection circuit, a gate circuit, a control circuit and a switch circuit. The detection circuit detects a fluid level in the tank and outputs a voltage level signal. The gate circuit receives the voltage level signal and outputs control signals accordingly. The control circuit receives the control signals and outputs a first voltage and a second voltage accordingly. The switch circuit receives the first voltage and the second voltage and turns on and turns off the electrically conductive fluid supply to the tank in accordance with the first voltage and the second voltage.
    • 用于控制向罐的导电流体供应的开关控制系统包括检测电路,门电路,控制电路和开关电路。 检测电路检测储罐中的液位并输出电压电平信号。 门电路接收电压电平信号,并相应地输出控制信号。 控制电路接收控制信号并相应地输出第一电压和第二电压。 开关电路接收第一电压和第二电压,并根据第一电压和第二电压接通和断开对槽的导电流体供应。