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    • 4. 发明授权
    • Dispersion compensation fiber
    • 色散补偿光纤
    • US09140851B2
    • 2015-09-22
    • US14009324
    • 2012-03-13
    • Shuqiang ZhangMingfeng FanSong WangJin XuJie LuoBeibei Cao
    • Shuqiang ZhangMingfeng FanSong WangJin XuJie LuoBeibei Cao
    • G02B6/036G02B6/02
    • G02B6/03666G02B6/02214G02B6/02261G02B6/03644
    • A dispersion compensation fiber comprises a fiber core and cladding. The fiber core is a core layer mainly doped with germanium and having a positive relative refractive index difference. The cladding covering the fiber core comprises a trench cladding mainly doped with fluorine, an annular cladding mainly doped with germanium, a matching cladding mainly doped with fluorine, and an outermost mechanical cladding in order. Relative refractive index differences of the fiber core and the claddings are respectively: Δ1% being 1.55% to 2.20%, Δ2% being −0.55% to −0.30%, Δ3% being 0.40% to 0.65%, Δ4% being −0.20% to −0.01%, and Δ5% being 0. Radius ranges, from R1 to R5, of the fiber core and the claddings are respectively: R1 being 1.4 to 1.7 μm, R2 being 4.1 to 4.8 μm, R3 being 6.7 to 8.8 μm, R4 being 10 to 17 μm, and R5 being 38 to 63 μm.
    • 色散补偿光纤包括光纤芯和包层。 纤维芯是主要掺杂锗并且具有正的相对折射率差的芯层。 覆盖纤维芯的包层包括主要掺杂有氟的沟槽包层,主要掺杂有锗的环形包层,主要掺杂有氟的匹配包层以及最外层机械包层。 纤维芯和包层的相对折射率差异分别为:&Dgr; 1%为1.55%至2.20%,&Dgr; 2%为-0.55%至-0.30%,&Dgr; 3%为0.40%至0.65%,&Dgr ; 4%为-0.20%至-0.01%,&Dgr; 5%为0.纤维芯和包层的半径范围为R1至R5分别为:R1为1.4〜1.7μm,R2为4.1〜4.8 μm,R3为6.7〜8.8μm,R4为10〜17μm,R5为38〜63μm。
    • 9. 发明申请
    • USER DEFINED FUNCTIONS FOR DATA LOADING
    • 用户定义的数据加载功能
    • US20120239612A1
    • 2012-09-20
    • US13485246
    • 2012-05-31
    • Muthian GeorgeSong Wang
    • Muthian GeorgeSong Wang
    • G06F17/30
    • G06F16/254
    • Data loading with user defined functions is described in various implementations. An example system for data loading may include a structured query language (SQL) compiler to identify a call to a table valued user defined function (TVUDF) within a SQL statement that includes an insert statement; identify metadata associated with the TVUDF; validate and resolve a subclass type of the TVUDF based on the metadata and the insert statement; and generate a data loading plan to retrieve and load data from an external data source into a table of a database based on the subclass type of the TVUDF. The system may also include a data loading engine in the database to execute the data loading plan, the data loading plan including the TVUDF to retrieve data from the external data source, and load the retrieved data into the table of the database in accordance with the data loading plan.
    • 在各种实现中描述了用户定义的功能的数据加载。 用于数据加载的示例系统可以包括结构化查询语言(SQL)编译器,以识别在包括插入语句的SQL语句内对表值用户定义函数(TVUDF)的调用; 识别与TVUDF相关的元数据; 基于元数据和插入语句验证并解析TVUDF的子类型; 并根据TVUDF的子类型生成数据加载计划,以从外部数据源检索数据并将数据加载到数据库的表中。 该系统还可以包括数据库中的数据加载引擎,以执行数据加载计划,数据加载计划包括TVUDF以从外部数据源检索数据,并且将检索的数据加载到数据库的表中,根据 数据加载计划
    • 10. 发明授权
    • Transformation of directed acyclic graph query plans to linear query plans
    • 将有向非循环图查询计划转换为线性查询计划
    • US08260768B2
    • 2012-09-04
    • US12697093
    • 2010-01-29
    • Song WangChetan Kumar GuptaAbhay Mehta
    • Song WangChetan Kumar GuptaAbhay Mehta
    • G06F17/30G06F7/00
    • G06F17/30
    • Methods, computer-readable storage media and computer systems are provided for transforming a directed acyclic graph (“DAG”) query plan into a linear plan. A DAG query plan may include a first operator and a second operator that are scheduled to be executed in parallel. The DAG query plan may be modified so that the first and second operators are executed in series as an upstream operator and a downstream operator. A data unit output from the upstream operator may be marked to indicate that the data unit has been processed by the upstream operator. The data unit received as input at the downstream operator may be inspected to determine whether the data unit has been marked. Once in linear form, the query plan may be optimized to conserve computing resources.
    • 提供了一种方法,计算机可读存储介质和计算机系统,用于将有向非循环图(“DAG”)查询计划转换为线性计划。 DAG查询计划可以包括被调度为并行执行的第一运算符和第二运算符。 可以修改DAG查询计划,使得第一和第二运算符作为上游运算符和下游运算符串联执行。 可以标记来自上游运营商的数据单元输出,以指示数据单元已被上游运营商处理。 可以检查在下游操作者处接收作为输入的数据单元以确定数据单元是否已被标记。 一旦成为线性形式,查询计划可以被优化以节省计算资源。