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1. 发明申请

US20080317184A1 METHOD FOR TRANSMITTING SYNCHRONIZATION SIGNAL IN MOBILE MULTIMEDIA SYSTEM 审中-公开
标题翻译：用于在移动多媒体系统中传输同步信号的方法
公开(公告)号：US20080317184A1
公开(公告)日：2008-12-25
申请号：US12145746
申请日：2008-06-25
申请人： Hui ZHANG , Junyun Yang , Fei Meng , Yu Xu , Jiongliang Li
发明人： Hui ZHANG , Junyun Yang , Fei Meng , Yu Xu , Jiongliang Li
IPC分类号： H04L7/00
CPC分类号： H04H20/95 , H04L7/041
摘要： The present invention discloses a method for transmitting a synchronization signal in a mobile multimedia system. In the method, a transmitter of the system transmits a synchronization signal sequence at a regular interval. The methods includes: generating a first synchronization signal sequence; generating a second synchronization signal sequence by performing a reversible transform for the first synchronization signal sequence; and transmitting the first and the second synchronization signal sequences in cascade. By the method provided by the present invention for transmitting a synchronization signal in a mobile multimedia system, a channel with wider delay spread can be handled, more precise and stabler synchronization performance can be achieved and the channel estimation module can be helped to get more accurate channel frequency domain response.
摘要翻译：本发明公开了一种在移动多媒体系统中发送同步信号的方法。在该方法中，系统的发射机以规则的间隔发送同步信号序列。所述方法包括：产生第一同步信号序列; 通过对所述第一同步信号序列执行可逆变换来产生第二同步信号序列; 并且级联地发送第一和第二同步信号序列。通过本发明提供的用于在移动多媒体系统中发送同步信号的方法，可以处理具有更宽的延迟扩展的信道，可以实现更精确和更稳定的同步性能，并且可以帮助信道估计模块获得更准确通道频域响应。

2. 发明授权

US09071355B2 Dynamic dispersion detecting method and apparatus 有权
标题翻译：动态色散检测方法及装置
公开(公告)号：US09071355B2
公开(公告)日：2015-06-30
申请号：US13476653
申请日：2012-05-21
申请人： Dezhong Yu , Fanming Meng , Junbo Xie , Yu Xu , Jiahong Zeng , Binlin Deng
发明人： Dezhong Yu , Fanming Meng , Junbo Xie , Yu Xu , Jiahong Zeng , Binlin Deng
IPC分类号： H04B10/2513
CPC分类号： H04B10/25133
摘要： A dynamic dispersion detecting method and apparatus are disclosed. The apparatus includes a tunable dispersion compensation module (101), a demodulator (102), a receiver (103), a partial band radio frequency power detecting unit (104), and an electrical signal ratio calculating unit (105). The method includes: demodulating a phase of a received optical signal; converting the demodulated optical signal into an electrical signal; sampling radio frequency power of the electrical signal to obtain an radio frequency signal; obtaining an electrical signal ratio of the radio frequency signal; and comparing a value of a currently detected electrical signal ratio with the values of the previously detected electrical signal ratios, tuning a dispersion compensation value according to a comparison result to find a peak electrical signal ratio, and obtaining a residual dispersion value of a system according to the peak electrical signal ratio.
摘要翻译：公开了一种动态色散检测方法和装置。该装置包括可调色散补偿模块（101），解调器（102），接收机（103），部分频带功率检测单元（104）和电信号比率计算单元（105）。该方法包括：解调所接收的光信号的相位; 将解调的光信号转换成电信号; 对电信号的射频功率进行采样以获得射频信号; 获得射频信号的电信号比; 并将当前检测到的电信号比值与先前检测到的电信号比的值进行比较，根据比较结果调整色散补偿值以找到峰值电信号比，并获得系统的残留色散值达到峰值电信号比。

3. 发明授权

US08688722B1 Processing a sequence of outer joins 有权
标题翻译：处理一系列外连接
公开(公告)号：US08688722B1
公开(公告)日：2014-04-01
申请号：US12639380
申请日：2009-12-16
申请人： O. Pekka Kostamaa , Yu Xu
发明人： O. Pekka Kostamaa , Yu Xu
IPC分类号： G06F7/00 , G06F17/30
CPC分类号： G06F17/30498
摘要： To process a sequence of outer joins in a database system, the database system performs a first outer join of the sequence of outer joins. A result of the first outer join is stored in a result table stored across plural storage modules of the database system. At least a subset of records of the result table is redistributed across the storage modules according to a first join attribute of the result table, where any record of the result table that has a null value for the first join attribute is not redistributed. A second outer join of the sequence is performed using the redistributed result table and another table, where the second outer join is based on the first join attribute of the result table.
摘要翻译：要处理数据库系统中的外连接序列，数据库系统执行外连接序列的第一个外连接。第一个外连接的结果存储在数据库系统的多个存储模块中存储的结果表中。结果表的记录的至少一个子集根据结果表的第一个连接属性跨存储模块重新分配，其中没有重新分配具有第一个连接属性的空值的结果表的任何记录。使用重新分发的结果表和另一个表执行序列的第二个外部连接，其中第二个外部连接基于结果表的第一个连接属性。

4. 发明申请

US20130173666A1 TECHNIQUES FOR DATA ASSIGNMENT FROM AN EXTERNAL DISTRIBUTED FILE SYSTEM TO A DATABASE MANAGEMENT SYSTEM 有权
标题翻译：从外部分布式文件系统到数据库管理系统的数据分配技术
公开(公告)号：US20130173666A1
公开(公告)日：2013-07-04
申请号：US13340335
申请日：2011-12-29
申请人： Yan Qi , Yu Xu , Olli Pekka Kostamaa , Jian Wen
发明人： Yan Qi , Yu Xu , Olli Pekka Kostamaa , Jian Wen
IPC分类号： G06F17/30
CPC分类号： G06F17/30079 , G06F17/30545 , G06F17/30557
摘要： Techniques for data assignment from an external distributed file system (DFS) to a database management system (DBMS) are provided. Data blocks from the DFS are represented as first nodes and access module processors of the DBMS are represented as second nodes. A graph is produced with the first and second nodes. Assignments are made for the first nodes to the second nodes based on evaluation of the graph to integrate the DFS with the DBMS.
摘要翻译：提供了从外部分布式文件系统（DFS）到数据库管理系统（DBMS）的数据分配技术。来自DFS的数据块被表示为第一节点，并且DBMS的访问模块处理器被表示为第二节点。使用第一和第二节点生成图形。基于图的评估将第一个节点分配给第二个节点，以将DFS与DBMS集成。

5. 发明申请

US20130124501A1 SYSTEM, METHOD AND COMPUTER-READABLE MEDIUM FOR OPTIMIZATION OF MULTIPLE-PARALLEL JOIN OPERATIONS ON SKEWED DATA 审中-公开
标题翻译：系统，方法和计算机可读介质，用于优化在并行数据上的多个并行连接操作
公开(公告)号：US20130124501A1
公开(公告)日：2013-05-16
申请号：US13466519
申请日：2012-05-08
申请人： Yu Xu
发明人： Yu Xu
IPC分类号： G06F17/30
CPC分类号： G06F17/30498
摘要： Techniques that facilitate management of skewed data during a parallel multiple join operation are provided. Portions of tables involved in the join operation can be distributed among a plurality of processing modules, and each of the processing modules can be provided with a list of skewed values of a join column of a larger table involved in the join operation. Each of the processing modules can scan the rows of first and second tables distributed to the processing modules and compare values of the join columns of both tables with the list of skewed values. One or more of the processing modules can then redistribute the skewed values.
摘要翻译：提供了在并行多重连接操作期间促进倾斜数据管理的技术。可以在多个处理模块之间分配涉及到连接操作的表的部分，并且每个处理模块可以被提供有连接操作中涉及的较大表的连接列的偏斜值的列表。每个处理模块可以扫描分配给处理模块的第一和第二表的行，并将两个表的连接列的值与偏斜值列表进行比较。一个或多个处理模块可以重新分配偏斜值。

6. 发明授权

US07460040B1 High-speed serial interface architecture for a programmable logic device 有权
标题翻译：用于可编程逻辑器件的高速串行接口架构
公开(公告)号：US07460040B1
公开(公告)日：2008-12-02
申请号：US11754670
申请日：2007-05-29
申请人： Thungoc M. Tran , Yu Xu , Kwong-Wen Wei , Sergey Shumarayev
发明人： Thungoc M. Tran , Yu Xu , Kwong-Wen Wei , Sergey Shumarayev
IPC分类号： H03M9/00
CPC分类号： H03M9/00 , H03K5/135 , H03K19/1774 , H03K19/17744
摘要： A high-speed serial interface for a programmable logic device includes a plurality of features to handle the various issues that may arise with data rates over 1 Gbps and particularly over 1.25 Gbps. Those features may include dynamic phase alignment to control clock-data skew, data realignment (e.g., bit slip circuitry) to account for channel-to-channel skew, full-duplex serializer and deserializer, out-of-range frequency support for low frequencies, and a soft-CDR mode.
摘要翻译：用于可编程逻辑器件的高速串行接口包括多个特征，以处理在1Gbps，特别是超过1.25Gbps的数据速率下可能出现的各种问题。这些特征可以包括动态相位对准以控制时钟数据偏移，数据重新对准（例如位移电路）以解决通道间通道偏移，全双工串行器和解串器，超低频率频率支持，和软CDR模式。

7. 发明申请

US20080154891A1 PHRASE MATCHING IN DOCUMENTS HAVING NESTED-STRUCTURE ARBITRARY (DOCUMENT-SPECIFIC) MARKUP 有权
标题翻译：具有结构化仲裁（文件特定）标记的文档中的相关匹配
公开(公告)号：US20080154891A1
公开(公告)日：2008-06-26
申请号：US12042287
申请日：2008-03-04
申请人： Sihem Amer-Yahia , Maria F. Fernandez , Divesh Srivastava , Yu Xu
发明人： Sihem Amer-Yahia , Maria F. Fernandez , Divesh Srivastava , Yu Xu
IPC分类号： G06F17/30
CPC分类号： G06F17/30938 , Y10S707/99933 , Y10S707/99934 , Y10S707/99935
摘要： A method of searching a document having nested-structure document-specific markup (such as Extensible Markup Language (XML)) involves 112 receiving a query that designates at least (A) a phrase to be matched in a phrase matching process, and (B) a selective designation of at least a tag or annotation that is to be ignored during the phrase matching process. The method further involves 114 deriving query-specific indices based on query-independent indices that were created specific to each document, and 116 carrying out the phrase matching process using the query-specific indices on the document having the nested-structure document-specific markup.
摘要翻译：搜索具有嵌套结构文档特定标记（例如可扩展标记语言（XML））的文档的方法涉及112接收在短语匹配处理中至少指定（A）要匹配的短语的查询，并且（B ）选择性地指定短语匹配过程中至少要被忽略的标签或注释。该方法还包括基于针对每个文档特定创建的独立于查询的索引来导出查询特定索引，以及116使用具有嵌套结构文档特定标记的文档上的查询特定索引进行短语匹配处理。

8. 发明授权

US08938444B2 Techniques for external application-directed data partitioning in data exporting from a database management system 有权
标题翻译：从数据库管理系统导出的数据中的外部应用程序定向数据分区的技术
公开(公告)号：US08938444B2
公开(公告)日：2015-01-20
申请号：US13340357
申请日：2011-12-29
申请人： Yu Xu , Olli Pekka Kostamaa
发明人： Yu Xu , Olli Pekka Kostamaa
IPC分类号： G06F17/30
CPC分类号： G06F17/30584
摘要： Techniques for external application-directed data partitioning in data exported from a parallel database management system (DBMS) are provided. An external application sends a query, a total number of requested access module processors (AMPs), and an application-defined data partitioning expression to the DBMS. The DBMS executes the query with the results vertical partitioned on the identified number of AMPs. Individual external mappers access their assigned AMPs asking for specific partitions that they are assigned to process the query results.
摘要翻译：提供了从并行数据库管理系统（DBMS）导出的数据中外部应用程序定向数据分区的技术。外部应用程序将查询，请求的访问模块处理器（AMP）的总数以及应用程序定义的数据分区表达式发送到DBMS。 DBMS执行查询，并将结果垂直划分在标识的AMP数量上。单独的外部映射器访问其分配的AMP，要求分配它们的特定分区来处理查询结果。

9. 发明授权

US08549006B2 Phrase matching in documents having nested-structure arbitrary (document-specific) markup 有权
标题翻译：具有嵌套结构任意（文档特定）标记的文档中的短语匹配
公开(公告)号：US08549006B2
公开(公告)日：2013-10-01
申请号：US12042287
申请日：2008-03-04
申请人： Sihem Amer-Yahia , Maria F. Fernandez , Divesh Srivastava , Yu Xu
发明人： Sihem Amer-Yahia , Maria F. Fernandez , Divesh Srivastava , Yu Xu
IPC分类号： G06F7/00
CPC分类号： G06F17/30938 , Y10S707/99933 , Y10S707/99934 , Y10S707/99935
摘要： A method of searching a document having nested-structure document-specific markup (such as Extensible Markup Language (XML)) involves 112 receiving a query that designates at least (A) a phrase to be matched in a phrase matching process, and (B) a selective designation of at least a tag or annotation that is to be ignored during the phrase matching process. The method further involves 114 deriving query-specific indices based on query-independent indices that were created specific to each document, and 116 carrying out the phrase matching process using the query-specific indices on the document having the nested-structure document-specific markup.
摘要翻译：搜索具有嵌套结构文档特定标记（例如可扩展标记语言（XML））的文档的方法涉及112接收在短语匹配处理中至少指定（A）要匹配的短语的查询，并且（B ）选择性地指定短语匹配过程中至少要被忽略的标签或注释。该方法还包括基于针对每个文档特定创建的独立于查询的索引来导出查询特定索引，以及116使用具有嵌套结构文档特定标记的文档上的查询特定索引进行短语匹配处理。

10. 发明授权

US08543596B1 Assigning blocks of a file of a distributed file system to processing units of a parallel database management system 有权
标题翻译：将分布式文件系统的文件块分配给并行数据库管理系统的处理单元
公开(公告)号：US08543596B1
公开(公告)日：2013-09-24
申请号：US12640320
申请日：2009-12-17
申请人： O. Pekka Kostamaa , Keliang Zhao , Yu Xu
发明人： O. Pekka Kostamaa , Keliang Zhao , Yu Xu
IPC分类号： G06F17/30 , G06F12/00
CPC分类号： G06F17/30194
摘要： In general, a technique or mechanism is provided to efficiently transfer data of a distributed file system to a parallel database management system using an algorithm that avoids or reduces sending of blocks of files across computer nodes on which the parallel database management system is implemented.
摘要翻译：通常，提供技术或机制以使用避免或减少跨越并行数据库管理系统的计算机节点上的文件块的发送的算法来有效地将分布式文件系统的数据传送到并行数据库管理系统。

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