Zhiyuan C Chen, 513030 Terra Maria Way, Ellicott, MD 21042

7228312, Jun 5, 2007

Mar 9, 2004

10/796435

Surajit Chaudhuri - Redmond WA, US
Zhiyuan Chen - Bellevue WA, US
Kyuseok Shim - Seoul, KR
Yuqing Yu - Ann Arbor MI, US

Microsoft Corporation - Redmond WA

G06F 17/00
G06F 17/30

707102, 707103 Y

An XML transformation tool that constructs a relational database with associated physical structures that can be populated with shredded XML data. A mapping transformation enumerator examines queries in the workload and enumerates mapping transformations that use XSD specific constraints and statistics on XML data and can be used to generate mappings from XSD to relational database schema that may lead to better performance in presence of physical design. A design tuner that searches mappings generated from a default mapping using enumerated transformations together with physical design structures associated with those mappings and selects a preferred mapping and the physical design structures. Cost estimates for performing queries in the workload are determined for the relational database implementing the mapping and associated physical design structures.

2006005, Mar 9, 2006

Sep 9, 2004

10/937641

Philip Korn - New York NY, US
Nikolaos Koudas - Springfield NJ, US
Divesh Srivastava - Summit NJ, US
Zhiyuan Chen - Columbia MD, US
Johannes Gehrke - Ithaca NY, US
Jayavel Shanmugasundaram - Tompkins NY, US

G06F 7/00

707100000

A framework defining a family of index structures useful in evaluating XML path expressions (i.e., twigs) in XML database is disclosed. Within this framework, two particular index structures with different space-time tradeoffs are presented that prove effective for the evaluation of twigs with value conditions. These index structures can be realized using access methods of an underlying relational database system. Experimental results show that the indices disclosed achieve significant improvement in performance for evaluating twig queries as compared with previously proposed XML path indices.

2021033, Oct 28, 2021

Oct 28, 2020

17/083290

- Baltimore MD, US
ZHIYUAN CHEN - Ellicott City MD, US
AHMED ALEROUD - Irbid, JO
FAN YANG - Catonsville MD, US

H04L 29/06
G06F 21/62

The invention described herein is directed to methods and systems for protecting network trace data. Network traces are used for network management, packet classification, traffic engineering, tracking user behavior, identifying user behavior, analyzing network hierarchy, maintaining network security, and classifying packet flows. In some embodiments, network trace data is protected by subjecting network trace data to data anonymization using an anonymization algorithm that simultaneously provides sufficient privacy to accommodate the organization need of the network trace data owner, provides acceptable data utility to accommodate management and/or network investigative needs, and provides efficient data analysis, at the same time.