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Displaying 1-50 out of 66 total
Extending Huffman coding for multilingual text compression
Found in: Data Compression Conference
By Chi-Hung Chi, Chi-Kwun Kan, Kwok-Shing Cheng, Ling Wong
Issue Date:March 1995
pp. 437
Summary form only given. We propose two new algorithms that are based on the 16-bit or 32-bit sampling character set and on the unique features of languages with a large number of distinct characters to improve the data compression ratios for multilingual ...
   
Reducing memory latency using a small software driven array cache
Found in: Hawaii International Conference on System Sciences
By Chi-Hung Chi, Chi-Sum Ho, Siu-Chung Lau
Issue Date:January 1995
pp. 202
From the programming viewpoint, data references can be classified into two types: array reference and non-array references. Array references have relatively strong spatial locality while non-array references have relatively strong temporal locality. Howeve...
   
Scalable Join Queries in Cloud Data Stores
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By Zhou Wei,Guillaume Pierre,Chi-Hung Chi
Issue Date:May 2012
pp. 547-555
Cloud data stores provide scalability and high availability properties for Web applications, but do not support complex queries such as joins. Web application developers must therefore design their programs according to the peculiarities of No SQL data sto...
 
Service Discovery Based on Objective and Subjective Measures
Found in: 2013 IEEE International Conference on Services Computing (SCC)
By Victor W. Chu,Raymond K. Wong,Wuhui Chen,Incheon Paik,Chi-Hung Chi
Issue Date:June 2013
pp. 360-367
Web services have become a primary mechanism for consuming resources available on the Internet. As more and more services are published on the Web, automated service discovery is critical to consumers to identify relevant and reliable services efficiently....
 
Non-functional Requirement Analysis and Recommendation for Software Services
Found in: 2013 IEEE International Conference on Web Services (ICWS)
By Xiao-Lin Zhang,Chi-Hung Chi,Chen Ding,Raymond K. Wong
Issue Date:June 2013
pp. 555-562
Non-Functional (NF) requirement is very important for the success of a software service. Considering that there could be multiple services implementing a same function, it is crucial for software providers to understand the real NF demands from consumers s...
 
Online Role Mining without Over-Fitting for Service Recommendation
Found in: 2013 IEEE International Conference on Web Services (ICWS)
By Victor W. Chu,Raymond K. Wong,Chi-Hung Chi
Issue Date:June 2013
pp. 58-65
Due to the popularity of smartphones, finding and recommending suitable services on mobile devices are increasingly important. Recent research has attempted to use role-based approaches to recommend mobile services to other members among the same group in ...
 
Data Decomposition Based Partial Replication Model for Software Services
Found in: 2013 IEEE International Conference on Services Computing (SCC)
By Shuo Chen,Chi-Hung Chi,Chen Ding,Raymond K. Wong
Issue Date:June 2013
pp. 256-263
Nowadays many software services are hosted in the Cloud. When there are more requests on these services, there are also more queries sent to the underlying database. In order to keep up with the increasing workload, it is necessary to have multiple servers...
 
CloudTPS: Scalable Transactions for Web Applications in the Cloud
Found in: IEEE Transactions on Services Computing
By Zhou Wei,Guillaume Pierre,Chi-Hung Chi
Issue Date:September 2012
pp. 525-539
NoSQL cloud data stores provide scalability and high availability properties for web applications, but at the same time they sacrifice data consistency. However, many applications cannot afford any data inconsistency. CloudTPS is a scalable transaction man...
 
Efficient QoS-based Service Selection with Consideration of User Requirements
Found in: 2012 16th IEEE International Enterprise Distributed Object Computing Conference (EDOC 2012)
By Anita Mohebi,Chen Ding,Chi-Hung Chi
Issue Date:September 2012
pp. 183-190
Many QoS-based service selection algorithms are complex and time-consuming, and sometimes require a lot of manual efforts from users. As a result, users' real-time searching experiences may not be good when there are many candidate services, because it cou...
 
Multiple non-functional criteria service selection based on user preferences and decision strategies
Found in: Service-Oriented Computing and Applications, IEEE International Conference on
By Raed Karim,Chen Ding,Chi-Hung Chi
Issue Date:December 2011
pp. 1-8
In order to choose from a list of functionally similar services, users often need to make their decisions based on multiple non-functional criteria they require on the target service. It is a natural fit to apply the Multi-Criteria Decision Making (MCDM) t...
 
Quality-Driven Hierarchical Clustering Algorithm for Service Intelligence Computation
Found in: Semantics, Knowledge and Grid, International Conference on
By Yun Wei Zhao,Chi-Hung Chi,Chen DIng
Issue Date:October 2011
pp. 107-113
Clustering is an important technique for intelligence computation such as trust, recommendation, reputation, and requirement elicitation. With the user centric nature of service and the user's lack of prior knowledge on the distribution of the raw data, on...
 
Collaborative Filtering Based Service Ranking Using Invocation Histories
Found in: Web Services, IEEE International Conference on
By Qiong Zhang,Chen Ding,Chi-Hung Chi
Issue Date:July 2011
pp. 195-202
Collaborative filtering based recommender systems are very successful on dealing with the information overload problem and providing personalized recommendations to users. When more and more web services are published online, this technique can also help r...
 
An Enhanced PROMETHEE Model for QoS-Based Web Service Selection
Found in: Services Computing, IEEE International Conference on
By Raed Karim,Chen Ding,Chi-Hung Chi
Issue Date:July 2011
pp. 536-543
Since selecting a web service based on Quality of Services (QoS) is essentially a Multi-Criteria Decision Making (MCDM) problem, various MCDM models would be suitable for implementing the selection systems. A few of the MCDM approaches have been explored i...
 
Selection Policy of Rescue Servers Based on Workload Characterization of Flash Crowd
Found in: Semantics, Knowledge and Grid, International Conference on
By Chi-Hung Chi, Shijie Xu, FengLin Li, Kwok-Yan Lam
Issue Date:November 2010
pp. 293-296
Flash crowd has generally been agreed to be one of the main threats to the availability of web services, and application replication is a promising approach to address such problem. In this paper, we first model the workload of flash crowds according to th...
 
A QoS Query Language for User-Centric Web Service Selection
Found in: Services Computing, IEEE International Conference on
By Delnavaz Mobedpour, Chen Ding, Chi-Hung Chi
Issue Date:July 2010
pp. 273-280
One of the prerequisites for the success of a QoS-based web service selection process is an accurately formulated QoS query. It is usually not an easy task for users to formulate an accurate query considering the complexity of many current QoS languages an...
 
Gossip-Based Workload Prediction and Process Model for Composite Workflow Service
Found in: Services, IEEE Congress on
By Weihong Song, Dejun Jiang, Chi-Hung Chi, Pengfei Jia, Xintong Zhou, Gen Zou
Issue Date:July 2009
pp. 607-614
In this paper, we propose to predict the workloads of the service components within the composite workflow based on the communication of the queue condition of service nodes. With this information, we actively discard the requests that has high probability...
 
Selection Strategy of Rescue Servers Under Hot-Spot Congestion
Found in: Internet and Web Applications and Services, International Conference on
By Shijie Xu, Chi-Hung Chi, Cheng Qian, Chen Ding
Issue Date:May 2009
pp. 468-473
In this paper, we investigate selection strategies for rescue servers in a fully collaborative in which heterogeneous systems share spare resource to address hotspot problems experienced by individual members. Different from content replication, delays due...
 
Complete Decentralized Mechanism Design for Online Machine Scheduling
Found in: Embedded Software and Systems, Second International Conference on
By Yuan Zhang, Chi-Hung Chi, Shengqing Zhang, Nan Zheng
Issue Date:May 2009
pp. 530-535
We study an online version of the classical parallel scheduling problem to minimize the total weighted completion time in a total decentralized setting: both the jobs and the machines are selfish entities who try to maximize their own interest. We study th...
 
On Web Service Construction Based on REpresentation State Transfer
Found in: E-Business Engineering, IEEE International Conference on
By Jin Zhang, Feng-lin Li, Chi-Hung Chi
Issue Date:October 2008
pp. 665-668
A new Web Service construction method is proposed according with the principle of Representation State Transfer (REST) in this paper. Using Resource-Oriented Architecture, how to construct the application with REST characteristics is described step by step...
 
Adaptive Quality Recommendation Mechanism for Software Service Provisioning
Found in: Web Services, IEEE International Conference on
By SiMing Li, Chen Ding, Chi-Hung Chi, Jianming Deng
Issue Date:September 2008
pp. 169-176
In this paper, we propose an adaptive quality recommendation mechanism to help software service providers understand the dynamism of quality demand from the majority of requesters accurately. The unique feature of our approach is that based on the intra-cl...
 
Quantifying Trust Based on Service Level Agreement for Software as a Service
Found in: Computer Software and Applications Conference, Annual International
By Lin Tan, Chi-Hung Chi, Jianming Deng
Issue Date:August 2008
pp. 116-119
In this paper, we aim to construct quantifying trust model based on Service Level Agreements (SLAs) as well as feedbacks from service consumers. The proposed model can aggregate the feedbacks weighted by both trust factor and similarity factor to give quan...
 
Using Hierarchical Scheme and Caching Techniques for Content Distribution Networks
Found in: Semantics, Knowledge and Grid, International Conference on
By Fu-Hong Yang, Chi-Hung Chi
Issue Date:October 2007
pp. 535-538
In this paper we propose to apply hierarchical web caching technology to CDN architecture and investigate the potential performance gain. We further develop an analytical model to quantify the benefit of using this scheme. Our results indicate that the pro...
 
Service Selection Model for Multimedia Service Workflow
Found in: Semantics, Knowledge and Grid, International Conference on
By PeiDe Zhong, Chi-Hung Chi
Issue Date:October 2007
pp. 224-229
Under SOA, QoS is one important factor of service selection for workflow. A wide range of attributes such as availability, reliability, performance, and reputation have been chosen to be criterions for QoS. However, in the domain of multimedia service, it ...
 
Quantifying Trust through Delegation in Service Oriented Architecture
Found in: Services, IEEE Congress on
By Zhiheng Xie, Chi-Hung Chi
Issue Date:July 2007
pp. 308-315
In SOA, service composition and selection can be viewed as delegation behaviors. Due to multi-levels service workflow, the delegation relationship among services is often confused and the overall trust of component services by the requester cannot be evalu...
 
Service Selection Model Based on QoS Reference Vector
Found in: Services, IEEE Congress on
By BangYu Wu, Chi-Hung Chi, Shijie Xu
Issue Date:July 2007
pp. 270-277
In SOA, one challenging problem is the QoS evaluation for the newly composed service. Most existing work on service composition focuses mainly on the static QoS behavior of individual components. Many other factors such as execution profile (e.g. service t...
 
Resource Allocation Based On Workflow For Enhancing the Performance of Composite Service
Found in: Services Computing, IEEE International Conference on
By BangYu Wu, Chi-Hung Chi, Zhe Chen
Issue Date:July 2007
pp. 552-559
Under SOA, multiple services can be aggregated to create a new composite service based on some predefined workflow. The QoS of this composite service is determined by the cooperation of all these Web services. With workflow pipelining, it is unreasonable t...
 
Content Delivered on Internet - How Much Can We Trust?
Found in: Semantics, Knowledge and Grid, International Conference on
By Chi-Hung Chi, Lin Liu
Issue Date:November 2006
pp. 81
In this paper, we investigate the trust problem that the data retrieval and reuse processes bring to web content. We argue that this trust problem is due to the inappropriate setup of web server, heterogeneity and presentation demand of web clients, value-...
 
Extending SOA to Cover Unreliable Services on Internet
Found in: Service-Oriented System Engineering, IEEE International Workshop on
By Wei Zhou, Chi-Hung Chi, Lin Liu
Issue Date:October 2006
pp. 110-116
In this paper, we would like to address the problem of using unreliable, yet valuable services in SOA design. We first give a new classification of services based on their service QoS levels and their deployment modes. Then, instead of driving for higher Q...
 
Task Delegation in Active Web Intermediary Network
Found in: Web Services, IEEE International Conference on
By Chi-Hung Chi, Lin Liu, Xiaoyin Yu
Issue Date:September 2006
pp. 955-956
In this paper, we formalize the concept of a delegation network for web intermediaries and present formal semantics for the responsibility of these actors. Key properties of the network are proven and method to judge an actor?s responsibility is given. Thi...
 
Proxy-Based Pervasive Multimedia Content Delivery
Found in: Computer Software and Applications Conference, Annual International
By Henry N. Palit, Chi-Hung Chi, Lin Liu
Issue Date:September 2006
pp. 255-264
As the Web client devices become more and more heterogeneous, the Web content providers should cater for multi-presentation services. Transcoding is seen as an alternative to deliver such services. When deployed offline, transcoding is space-consuming, inf...
 
Quantitative Analysis on the Cacheability Factors of Web Objects
Found in: Computer Software and Applications Conference, Annual International
By Chi-Hung Chi, Lin Liu, LuWei Zhang
Issue Date:September 2006
pp. 532-538
In this paper, we would like to quantify factors that contribute to the cacheability decision of web objects. Our study is based on a comprehensive study of object attributes that are related to the HTTP protocol transfer, proxy preference, content availab...
 
Quantitative Trust Based on Actions
Found in: Web Services, IEEE International Conference on
By Chao Wang, Chi-Hung Chi
Issue Date:September 2006
pp. 178-188
In this paper, we propose an automatic, self-adaptive trust model for component-based Service-Oriented Architecture that is based on Bayesian model. The focus of this model is the
 
Truthful application-layer multicast in mesh-based selfish overlays
Found in: Performance, Computing, and Communications Conference, 2002. 21st IEEE International
By Wei Zhou, Ke Xu, J. Liu, Chi-Hung Chi
Issue Date:April 2006
pp. 88
Building a multicast tree in an overlay network is the major problem in application layer multicast. In a selfish overlay network, the end hosts may not be cooperative. They are willing to maximize their own benefits instead of being loyal to the protocol ...
 
Content-Aware Global Static Compression for Web Content Delivery
Found in: Web Content Caching and Distribution, International Workshop on
By Junli Yuan, Chi-Hung Chi, Qibin Sun
Issue Date:September 2005
pp. 62-70
<p>The effectiveness of real-time lossless compression on web data is found to be limited by the relatively small size of its basic operation unit, web object. However, we observe that while the repeated occurrence frequencies of strings within a sin...
 
Architecture and Performance of Application Networking in Pervasive Content Delivery
Found in: Data Engineering, International Conference on
By Mu Su, Chi-Hung Chi
Issue Date:April 2005
pp. 656-667
This paper proposes Application Networking (App.Net) architecture that enables Web server to deploy intermediate response with associated service logic to edge proxies in form of a workflow. The recipient proxy is allowed to instantiate the workflow using ...
 
Normalizing Traffic Pattern with Anonymity for Mission Critical Applications
Found in: Simulation Symposium, Annual
By Dongxi Liu, Chi-Hung Chi, Ming Li
Issue Date:April 2004
pp. 293
Intruders often want to analyze traffic pattern to get information for his some malicious activities in ultra-secure network. This paper presents a general approach to prevent traffic pattern of IP-based network from being analyzed. It is an isolated schem...
 
Accelerating Web Page Retrieval Through Object Usage Declaration
Found in: Simulation Symposium, Annual
By Chi-Hung Chi, Xiang Li, Hongguang Wang
Issue Date:April 2004
pp. 104
With the increasing amount of dynamic and personalized web content, researchers start to address the acceleration of the first time access of web pages, hopefully to bring significant improvement to content delivery. While most of these efforts are related...
 
Efficient Key Assignment Scheme for Mobile Agent Systems
Found in: Tools with Artificial Intelligence, IEEE International Conference on
By Wai-Meng Chew, Chi-Hung Chi, Tie-Yan Li
Issue Date:November 2003
pp. 338
Agent security is always a key concern to many mobile agent systems such as distributed intrusion detection systems (DIDS), where an attacker might turn to the mobile agent directory server if he fails to locate the critical IDS hosts/agents. Previous work...
 
A Generalized Site Ranking Model for Web IR
Found in: Web Intelligence, IEEE / WIC / ACM International Conference on
By Chen Ding, Chi-Hung Chi
Issue Date:October 2003
pp. 584
Normally, the unit for a ranking model in a web IR system is a web page, which is, sometimes, just an information fragment. A larger unit considering the linkage information may be desired to reduce the cognitive overload for users to identify the complete...
 
Context Query in Information Retrieval
Found in: Tools with Artificial Intelligence, IEEE International Conference on
By Chi-Hung Chi, Chen Ding, Kwok-Yan Lam
Issue Date:November 2002
pp. 101
It is observed that there is an important query requirement missing for search engines. With the wide variation of domain knowledge and user's interest, a user would like to retrieve documents in which one query term is discussed in the context of another ...
 
Study for Fusion of Different Sources to Determine Relevance
Found in: Tools with Artificial Intelligence, IEEE International Conference on
By Chi-Hung Chi, Chen Ding, Kwok-Yan Lam
Issue Date:November 2002
pp. 515
The relevance of a web document could be measured not only by its text content, but also by some other factors such as the link connectivity, the usage pattern. In previous data fusion researches, the text is the only source to determine the relevance, and...
 
Reverse mapping of referral links from storage hierarchy for Web documents
Found in: Tools with Artificial Intelligence, IEEE International Conference on
By Chen Ding, Chi-Hung Chi, V. Tam
Issue Date:November 2000
pp. 0216
Abstract: Due to the lack of back-pointers, information about the referral parent(s) of a given Web page is not usually available to Web surfers. This significantly reduces the effectiveness of Web surfing and information discovery. We propose a mechanism ...
 
Multi-Lingual Cascading Text Compressors for WWW
Found in: Information Technology: Coding and Computing, International Conference on
By Chi-Hung Chi
Issue Date:March 2000
pp. 516
Global sharing and distribution of information on Internet result in a great demand for efficient multi-lingual text compression for web server and proxy implementation. Current text compressors such as Huffman coding, Lempel-Ziv (LZ) variants, and LZ-Huff...
 
Design Consideration for Multi-Lingual Cascading Text Compressors
Found in: Data Compression Conference
By Chi-Hung Chi, Yan Zhang
Issue Date:March 1999
pp. 520
In this paper, we studied the cascading of LZ variants to Huffman coding for multilingual documents. Two models are proposed: the static model and the adaptive (dynamic) model. The static model makes use of the dictionary generated by the LZW algorithm in ...
   
Reducing data access penalty using intelligent opcode-driven cache prefetching
Found in: Computer Design, International Conference on
By Chi-Hung Chi, Siu-Chung Lau
Issue Date:October 1995
pp. 512
In the latest processor architectures such as IBM PowerPC and HP Precision Architecture (PA), it is found that certain important compound opcodes such as LOAD-UPDATE and LOAD-MODIFY contain accurate information about how data will be referenced in the near...
 
Compiler Optimization Technique for Data Cache Prefetching Using a Small CAM Array
Found in: Parallel Processing, International Conference on
By Chi-Hung Chi
Issue Date:August 1994
pp. 263-266
With advances in compiler optimization and program flow analysis, software assisted cache prefetching schemes using PREFETCH instructions are now possible. Although data can be prefetched accurately into the cache, the runtime overhead associated with thes...
 
Content Grid: A Novel Approach to Address Pervasive Internet Access
Found in: Semantics, Knowledge and Grid, International Conference on
By Su Mu, Chi-Hung Chi, Henry Palit, Lin Liu
Issue Date:November 2006
pp. 82
In this paper, we propose a new grid architecture that focuses on the pervasive delivery of content service. This grid structure integrates Web and P2P systems, and leverages on the respective advantages of these dissimilar sub-systems for better quality a...
 
Effective Web Service Retrieval Based on Clustering
Found in: Semantics, Knowledge and Grid, International Conference on
By Dong Shou, Chi-Hung Chi
Issue Date:December 2008
pp. 469-472
Due to user’s inability to define his service requirement in a precise way, the services returned by Service Search Engine(SSE) are mostly inadequate or inaccurate. Taking a clustering method on its potential search results would not only improve its searc...
 
A Clustering-Based Approach for Assisting Semantic Web Service Retrieval
Found in: Web Services, IEEE International Conference on
By Dong Shou, Chi-Hung Chi
Issue Date:September 2008
pp. 838-839
The discovery of suitable web services for a given task from a brokerage system is the core part of current Service Oriented Architecture (SOA). With the number of registered web services growing, organization of search results is critical for improving th...
 
Modeling Service Quality for Dynamic QoS Publishing
Found in: Services Computing, IEEE International Conference on
By Qixing Du, Chi-Hung Chi, Shuo Chen, Jianming Deng
Issue Date:July 2008
pp. 307-314
As web services are widely adopted, the nonfunctional requirements (i.e. QoS constraints) have become a significant factor in implementing trustworthy and predictable service applications. In this paper, we analyze the QoS publishing necessity, and categor...
 
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