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Displaying 1-50 out of 56 total
Privacy-Preserving Social Network for an Untrusted Server
Found in: 2013 International Conference on Cloud and Green Computing (CGC)
By Hoang Giang Do, Wee Keong Ng, Zhendong Ma
Issue Date:September 2013
pp. 472-478
In recent years, online social networks have become a popular avenue for users to interact and engage in social activities. The volume of data handled by social networks is staggering: there are about 3, 000 picture uploads to Flickr each minute, 190 milli...
 
IntRank: Interaction Ranking-Based Trustworthy Friend Recommendation
Found in: IEEE TrustCom/IEEE ICESS/FCST, International Joint Conference of
By Lizi Zhang,Hui Fang,Wee Keong Ng,Jie Zhang
Issue Date:November 2011
pp. 266-273
Social networks are fundamental to virtual communities (e.g., forums, blogs) and virtual communities benefit from well-established social networks. As making friends with other members is a common way to establish social relationships and people need to de...
 
Predict Energy Consumption of Trigger-Driven Sensor Network by Markov Chains
Found in: Distributed Computing Systems Workshops, International Conference on
By Wei Zha, Wee Keong Ng
Issue Date:June 2011
pp. 350-356
Markov Model has been proved its feasibility of predicting the energy state of sensor nodes. Thus, user can monitor sensor nodes energy state in real-time without querying them frequently. However, a stationary state transition probability is required to a...
 
Privacy-Preserving Gradient-Descent Methods
Found in: IEEE Transactions on Knowledge and Data Engineering
By Shuguo Han, Wee Keong Ng, Li Wan, Vincent C.S. Lee
Issue Date:June 2010
pp. 884-899
Gradient descent is a widely used paradigm for solving many optimization problems. Gradient descent aims to minimize a target function in order to reach a local minimum. In machine learning or data mining, this function corresponds to a decision model that...
 
Incremental Maintenance of 2-Hop Labeling of Large Graphs
Found in: IEEE Transactions on Knowledge and Data Engineering
By Ramadhana Bramandia, Byron Choi, Wee Keong Ng
Issue Date:May 2010
pp. 682-698
Recent interests on xml, the Semantic Web, and Web ontology, among other topics, have sparked a renewed interest on graph-structured databases. A fundamental query on graphs is the reachability test of nodes. Recently, 2-hop labeling has been proposed to i...
 
Privacy-Preserving Singular Value Decomposition
Found in: Data Engineering, International Conference on
By Shuguo Han, Wee Keong Ng, Philip S. Yu
Issue Date:April 2009
pp. 1267-1270
In this paper, we propose secure protocols to perform Singular Value Decomposition (SVD) for two parties over horizontally and vertically partitioned data. We propose various secure building blocks for the computations of QR algorithm so that it is privacy...
 
Enabling Mass Customization through Semantic Web Services
Found in: Asia-Pacific Conference on Services Computing. 2006 IEEE
By Haifeng Liu, Wee-Keong Ng, Bin Song, Xiang Li, Wen-Feng Lu
Issue Date:December 2007
pp. 239-245
In order to satisfy individual customer needs with near mass production efficiency, product manufacturers need to effectively collaborate with their dynamic value chain part- ners along the product lifecycle process. A primary need is to develop semantic i...
 
Enhancing the Effectiveness of Clustering with Spectra Analysis
Found in: IEEE Transactions on Knowledge and Data Engineering
By Wenyuan Li, Wee-Keong Ng, Ying Liu, Kok-Leong Ong
Issue Date:July 2007
pp. 887-902
For many clustering algorithms, such as K-Means, EM, and CLOPE, there is usually a requirement to set some parameters. Often, these parameters directly or indirectly control the number of clusters, that is, k, to return. In the presence of different data c...
 
Dynamical Systems for Discovering Protein Complexes and Functional Modules from Biological Networks
Found in: IEEE/ACM Transactions on Computational Biology and Bioinformatics
By Wenyuan Li, Ying Liu, Hung-Chung Huang, Yanxiong Peng, Yongjing Lin, Wee-Keong Ng, Kok-Leong Ong
Issue Date:April 2007
pp. 233-250
Recent advances in high throughput experiments and annotations via published literature have provided a wealth of interaction maps of several biomolecular networks, including metabolic, protein-protein, and protein-DNA interaction networks. The architectur...
 
Agents and Stream Data Mining: A New Perspective
Found in: IEEE Intelligent Systems
By Kok-Leong Ong, Zili Zhang, Wee-Keong Ng, Ee-Peng Lim
Issue Date:May 2005
pp. 60-67
Many organizations struggle with what to do with the massive amount of data they collect. Although some have touted data mining as the solution, it has failed to have a major impact despite its successes in many areas. One reason is that data mining algori...
 
Blocking Reduction Strategies in Hierarchical Text Classification
Found in: IEEE Transactions on Knowledge and Data Engineering
By Aixin Sun, Ee-Peng Lim, Wee-Keong Ng, Jaideep Srivastava
Issue Date:October 2004
pp. 1305-1308
One common approach in hierarchical text classification involves associating classifiers with nodes in the category tree and classifying text documents in a top-down manner. Classification methods using this top-down approach can scale well and cope with c...
 
A Support-Ordered Trie for Fast Frequent Itemset Discovery
Found in: IEEE Transactions on Knowledge and Data Engineering
By Yew-Kwong Woon, Wee-Keong Ng, Ee-Peng Lim
Issue Date:July 2004
pp. 875-879
<p><b>Abstract</b>—The importance of data mining is apparent with the advent of powerful data collection and storage tools; raw data is so abundant that manual analysis is no longer possible. Unfortunately, data mining problems are diffic...
 
Personalized Web Views for Multilingual Web Sources
Found in: IEEE Internet Computing
By Zehua Liu, Wee-Keong Ng, Ee-Peng Lim
Issue Date:July 2004
pp. 16-22
When browsing information on large Web sites, users often receive too much irrelevant information. The WWW Information Collection, Collaging, and Programming (Wiccap) system lets ordinary users build personalized Web views, which let them see only the info...
 
WICCAP: From Semi-structured Data to Structured Data
Found in: Engineering of Computer-Based Systems, IEEE International Conference on the
By Zhao Li, Wee Keong Ng
Issue Date:May 2004
pp. 86
Web data extraction is a technique for extracting and integrating data from web based semi-structured data. Wrappers function like the kernel of web data extraction systems providing information mediator between users and a large number of heterogeneous da...
 
Spectral Analysis of Text Collection for Similarity-based Clustering
Found in: Data Engineering, International Conference on
By Wenyuan Li, Wee-Keong Ng, Ee-Peng Lim
Issue Date:April 2004
pp. 833
No summary available.
   
An Architectural Framework for Native XML Data Management
Found in: Cyberworlds, International Conference on
By Khin-Myo Win, Wee-Keong Ng, Ee-Peng Lim
Issue Date:December 2003
pp. 302
With rapid increase of semistructured data over the Web, XML becomes popular to represent such data and emerges as a de facto standard for information exchange among e-business applications. Since XML data are widely distributed, new native XML database sy...
 
Efficient Web Log Mining for Product Development
Found in: Cyberworlds, International Conference on
By Yew-Kwong Woon, Wee-Keong Ng, Xiang Li, Wen-Feng Lu
Issue Date:December 2003
pp. 294
With the new global economy, manufacturing companies are focusing their efforts on the product development process which is fast emerging as a new competitive weapon. Several product development solutions allow engineers, suppliers, business partners and e...
 
Modelling and Predicting Web Page Accesses Using Markov Processes
Found in: Database and Expert Systems Applications, International Workshop on
By Devanshu Dhyani, Sourav S Bhowmick, Wee-Keong Ng
Issue Date:September 2003
pp. 332
The significance of modelling and measuring various attributes of the Web in part or as a whole is undeniable. Although Web related metrics have become increasingly sophisticated, few employ models to explain their measurements. In this paper, we discuss m...
 
A Visual Interface for Native XML Database
Found in: Database and Expert Systems Applications, International Workshop on
By Khin-Myo Win, Emerald Rosasillfiani, Wee-Keong Ng, Ee-Peng Lim
Issue Date:September 2003
pp. 571
XML becomes a de facto standard for representing and exchanging data over the Web. With the tremendous growth of XML data on the Internet, an efficient database system becomes necessary to maintain it. Traditional databases that force all data to conform t...
 
On Querying Geospatial and Georeferenced Metadata Resources in G-Portal
Found in: Digital Libraries, Joint Conference on
By Zehua Liu, Ee-Peng Lim, Wee-Keong Ng, Dion H. Goh
Issue Date:May 2003
pp. 245
G-Portal is a web portal system providing a range of digital library services to access geospatial and georeferenced resources on the Web. Among them are the storage and query subsystems that provide a central repository of metadata resources organized und...
 
On Querying Geospatial and Georeferenced Metadata Resources in G-Portal
Found in: Digital Libraries, Joint Conference on
By Zehua Liu, Ee-Peng Lim, Wee-Keong Ng, Dion H. Goh
Issue Date:May 2003
pp. 245
G-Portal is a web portal system providing a range of digital library services to access geospatial and georeferenced resources on the Web. Among them are the storage and query subsystems that provide a central repository of metadata resources organized und...
 
Detecting and Representing Relevant Web Deltas in WHOWEDA
Found in: IEEE Transactions on Knowledge and Data Engineering
By Sourav S. Bhowmick, Sanjay Kumar Madria, Wee Keong Ng
Issue Date:March 2003
pp. 423-441
<p><b>Abstract</b>—In this paper, we present a mechanism for detecting and representing changes, given the old and new versions of a set of interlinked Web documents, retrieved in response to a user's query. In particular, we show how to ...
 
Evaluating Web Access Log Mining Algorithms: A Cognitive Approach
Found in: Web Information Systems Engineering Workshops, International Conference on
By Yew-Kwong Woon, Wee-Keong Ng, Ee-Peng Lim
Issue Date:December 2002
pp. 217
The wide availability of web access logs makes them ideal data sources for the mining of web behavior for electronic commerce competitiveness. Unfortunately, since such logs were originally meant for debugging purposes, they cannot be used directly for min...
 
Online and Incremental Mining of Separately-Grouped Web Access Logs
Found in: Web Information Systems Engineering, International Conference on
By Yew-Kwong Woon, Wee-Keong Ng, Ee-Peng Lim
Issue Date:December 2002
pp. 53
The rising popularity of electronic commerce makes data mining an indispensable technology for business competitiveness. The World Wide Web provides abundant raw data in the form of web access logs, web transaction logs and web user profiles. Without data ...
 
Web Informetrics: Extending Classical Informetrics to the Web
Found in: Database and Expert Systems Applications, International Workshop on
By Devanshu Dhyani, Sourav S Bhowmick, Wee-Keong Ng
Issue Date:September 2002
pp. 351
In this paper, we explored the extension of classical informetric theory to the WWW. From the power law distribution of Webpage degrees, we derived other interesting laws that hold for the Web such as Mandelbrot?s law, Leimkuhler?s law and Bradford?s law. ...
 
Efficient k Nearest Neighbor Queries on Remote Spatial Databases Using Range Estimation
Found in: Scientific and Statistical Database Management, International Conference on
By Danzhou Liu, Ee-Peng Lim, Wee-Keong Ng
Issue Date:July 2002
pp. 121
K -Nearest Neighbor k -NN) queries are used in GIS and CAD/CAM applications to find the k spatial objects closest to some given query points. Most previous k -NN research has assumed that the spatial databases to be queried are local, and that the query pr...
 
Fast Online Dynamic Association Rule Mining
Found in: Web Information Systems Engineering, International Conference on
By Yew-Kwong Woon, Wee-Keong Ng, Amitabha Das
Issue Date:December 2001
pp. 0278
At present, there are no association rule mining algorithms that are suitable for use in electronic commerce because they do not consider that new products are introduced and old ones are retired frequently and they assume that support thresholds do not ch...
 
An Information Concierge for the Web
Found in: Database and Expert Systems Applications, International Workshop on
By Feifei Li, Zehua Liu, Yangfeng Huang, Wee Keong Ng
Issue Date:September 2001
pp. 0672
Abstract: WWW Information Collection, Collaging and Programming (WICCAP) system is a software system for the generation of logical views of web resources, and the extraction of desired information in the form of a structured document. It is designed to ena...
 
Cooperative Multi-attribute Bilateral Online Negotiation for E-commerce
Found in: Database and Expert Systems Applications, International Workshop on
By Lei Zhao, Wee-Keong Ng, Ee-Peng Lim
Issue Date:September 2001
pp. 0703
Abstract: Currently, fixed-price sale and online auction are two major sale modes in the applied electronic commerce systems. Bilateral negotiation does not yet have a satisfying performance in the Internet-based transactions. In this paper, the time-indep...
 
Financial Advisor Agent in a Multi-Agent Financial Trading System
Found in: Database and Expert Systems Applications, International Workshop on
By V. Pandey, Wee-Keong Ng, Ee-Peng Lim
Issue Date:September 2000
pp. 482
Agent based technology has gained a lot of importance over recent years as is evident from the rapidly growing number of Web sites using agents. In the future, the level of automation would be such that work delegated to an agent could be accomplished by c...
 
eBroker: An Agent-Based Query Routing System for Distributed E-Commerce Databases
Found in: Parallel and Distributed Systems, International Conference on
By Yong Lin, Ee-Peng Lim, Wee-Keong Ng
Issue Date:July 2000
pp. 517
With the rapid increase in the number of E-commerce web sites, Internet users are now able to purchase items from the web. Nevertheless, the large number of E-commerce web sites also brings about the problem of identifying sites that sell the desired produ...
 
Reducing Cognitive Overheads in a Web Warehouse Using Reverse-Osmosis
Found in: Parallel and Distributed Systems, International Conference on
By Sourav S. Bhowmick, Wee Keong Ng, EE-Peng Lim, Sanjay Madria
Issue Date:July 2000
pp. 171
This paper provides a quantitative analysis of reducing cognitive overheads in a web warehouse using an important class of operation called reverse osmosis. The analysis is used to examine two different cognitive overheads of locating relevant nodes or inf...
 
DTD-Miner: A Tool for Mining DTD from XML Documents
Found in: Advanced Issues of E-Commerce and Web-Based Information Systems, International Workshop on
By Chuang-Hue Moh, Ee-Peng Lim, Wee-Keong Ng
Issue Date:June 2000
pp. 144
XML documents are semistructured and the structure of the documents is embedded in the tags. Although XML documents can be accompanied by a DTD that defines the structure of the documents, the presence of a DTD is not mandatory. The difficulty in deriving ...
 
Detecting and Representing Relevant Web Deltas Using Web Join
Found in: Distributed Computing Systems, International Conference on
By Sourav S. Bhowmick, Wee Keong Ng, Ee-Peng Lim, Sanjay Madria
Issue Date:April 2000
pp. 246
In this paper, we show how to detect and represent web deltas, i.e., changes in Web information, that are relevant to a user's query in the context of our web warehousing system called WHOWEDA (Warehouse of Web Data). In WHOWEDA, Web information is materia...
 
Cost-Benefit Analysis of Web Bag in a Web Warehouse
Found in: Database Engineering and Applications Symposium, International
By Sourav S Bhowmick, Wee-Keong Ng, Ee-Peng Lim, Sanjay Madria
Issue Date:August 1999
pp. 34
Sets and bags are closely related structures and have been studied in relational databases. A bag is different from a set in that it is sensitive to the number of times an element occurs while a set is not. In this paper, we introduce the concept of web ba...
 
Pi-Web Join in A Web Warehouse
Found in: Database Systems for Advanced Applications, International Conference on
By Sourav S. Bhowmick, Sanjay K. Madria, Wee-Keong Ng, Ee-Peng Lim
Issue Date:April 1999
pp. 255
With the enormous amount of data stored in the World Wide Web, it is increasingly important to design and develop powerful web warehousing tools. The key objective of our web warehousing project, called WHOWEDA (Warehouse of Web Data), is to design and imp...
 
Complex Queries in a Shared Multi User Relational Cloud Database
Found in: 2013 IEEE 6th International Conference on Cloud Computing (CLOUD)
By Vasily Sidorov, Wee Keong Ng
Issue Date:June 2013
pp. 903-909
While DaaS is becoming more and more popular enterprises start considering it as an option to reduce IT maintenance costs. But data privacy and security issues keep most of them from moving to the cloud. Existing schemes of encrypting the database usually ...
 
Model and Research Issues for Refreshing a Very Large Website
Found in: Web Information Systems Engineering, International Conference on
By Haifeng Liu, Wee Keong Ng, Ee-Peng Lim
Issue Date:June 2000
pp. 0291
Although much work has been done on WWW information management, research in keeping information on websites up-to-date is still in its infancy. For a very large website whose content is derived from some source databases, it is important to maintain its fr...
 
WEDAGEN - A Synthetic Web Database Generator
Found in: Database and Expert Systems Applications, International Workshop on
By Pallavi Priyadarshini, Fengqiong Qin, Ee-Peng Lim, Wee-Keong Ng
Issue Date:September 1999
pp. 744
At the Center for Advanced Information Systems (CAIS), a Web Warehousing System [2] is being developed to store and manipulate web information. The system named WHOWEDA (WareHouse Of WEb DAta) stores extracted web information as web tables and provides sev...
 
ASMA: Autonomous Software Management Agent System
Found in: Information, Intelligence, and Systems, International Conference on
By Mathew Yap, Wee-Keong Ng
Issue Date:April 1999
pp. 630
ASMA is used as a practical application of basic life-like characteristics like reproduction, growth, death, movement and metabolic cycle in a software agent. As software management moves toward automation, we see increasing relevance in incorporating auto...
 
A Relational Interface for Heterogeneous Information Sources
Found in: Advances in Digital Libraries Conference, IEEE
By Ee-Peng Lim, Wee Keong Ng
Issue Date:May 1997
pp. 128
The World Wide Web today consists of a vast repository of diverse information distributed geographically across different locations. In the near future, this wealth of information will constitute the major bulk of information resources for digital library ...
 
Classification in P2P networks with cascade support vector machines
Found in: ACM Transactions on Knowledge Discovery from Data (TKDD)
By Hock Hee Ang, Steven C. H. Hoi, Vivekanand Gopalkrishnan, Wee Keong Ng
Issue Date:November 2013
pp. 1-29
Classification in Peer-to-Peer (P2P) networks is important to many real applications, such as distributed intrusion detection, distributed recommendation systems, and distributed antispam detection. However, it is very challenging to perform classification...
     
Density-based clustering of data streams at multiple resolutions
Found in: ACM Transactions on Knowledge Discovery from Data (TKDD)
By Kuan Zhang, Li Wan, Philip S. Yu, Wee Keong Ng, Xuan Hong Dang
Issue Date:July 2009
pp. 1-28
In data stream clustering, it is desirable to have algorithms that are able to detect clusters of arbitrary shape, clusters that evolve over time, and clusters with noise. Existing stream data clustering algorithms are generally based on an online-offline ...
     
On incremental maintenance of 2-hop labeling of graphs
Found in: Proceeding of the 17th international conference on World Wide Web (WWW '08)
By Byron Choi, Ramadhana Bramandia, Wee Keong Ng
Issue Date:April 2008
pp. 1-7
Recent interests on XML, Semantic Web, and Web ontology, among other topics, have sparked a renewed interest on graph-structured databases. A fundamental query on graphs is the reachability test of nodes. Recently, 2-hop labeling has been proposed to index...
     
Privacy-preservation for gradient descent methods
Found in: Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining (KDD '07)
By Li Wan, Shuguo Han, Vincent C. S. Lee, Wee Keong Ng
Issue Date:August 2007
pp. 775-783
Gradient descent is a widely used paradigm for solving many optimization problems. Stochastic gradient descent performs a series of iterations to minimize a target function in order to reach a local minimum. In machine learning or data mining, this functio...
     
Web classification using support vector machine
Found in: Proceedings of the fourth international workshop on Web information and data management (WIDM '02)
By Aixin Sun, Ee-Peng Lim, Wee-Keong Ng
Issue Date:November 2002
pp. 96-99
In web classification, web pages from one or more web sites are assigned to pre-defined categories according to their content. Since web pages are more than just plain text documents, web classification methods have to consider using other context features...
     
A visual tool for building logical data models of websites
Found in: Proceedings of the fourth international workshop on Web information and data management (WIDM '02)
By Ee-Peng Lim, Feifei Li, Wee Keong Ng, Zehua Liu
Issue Date:November 2002
pp. 92-95
Information sources over the WWW contain a large amount of data organized according to different interests and values. Thus, it is important that facilities are there to enable users to extract information of interest in a simple and effective manner. To d...
     
G-Portal: a map-based digital library for distributed geospatial and georeferenced resources
Found in: Proceedings of the second ACM/IEEE-CS joint conference on Digital libraries (JCDL '02)
By Christopher Soo-Guan Khoo, Dion Hoe-Lian Goh, Ee-Peng Lim, Susan Ellen Higgins, Wee-Keong Ng, Zehua Liu
Issue Date:July 2002
pp. 351-358
As the World Wide Web evolves into an immense information network, it is tempting to build new digital library services and expand existing digital library services to make use of web content. In this paper, we present the design and implementation of G-Po...
     
Rapid association rule mining
Found in: Proceedings of the tenth international conference on Information and knowledge management (CIKM'01)
By Amitabha Das, Wee-Keong Ng, Yew-Kwong Woon
Issue Date:October 2001
pp. 474-481
Association rule mining is a well-researched area where many algorithms have been proposed to improve the speed of mining. In this paper, we propose an innovative algorithm called Rapid Association Rule Mining (RARM) to once again break this speed barrier....
     
Web schemas in WHOWEDA
Found in: Proceedings of the third ACM international workshop on Data warehousing and OLAP (DOLAP '00)
By Sanjay Madria, Saurav S. Bhowmick, Wee Keong Ng
Issue Date:November 2000
pp. 17-24
We consider a system in which many users run queries to examine subsets of a large object set. The object set is partitioned into files on tape. A single subset of objects will be visited by multiple queries in the workload. This locality of access creates...
     
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