Main coordinator: Associate Professor Rui Zhang
Date: 14 Dec 2014
Venue: Room 1402, Science & Technology Building, Shenzhen University, 3688 Nanhai Ave., Nanshan District, Shenzhen, China
|14:00-14:15||Workshop Introduction||Associate Prof. Rui Zhang||University of Melbourne|
|14:15-14:30||Welcome from Shenzhen University||Prof. Qingquan Li||Shenzhen University|
|14:30-15:00||Replica Consistency Issuses in Wide Column Store||Prof. Jianmin Wang||Tsinghua Universitye|
|15:00-15:30||Recommending Products on Microbloging||Assistant Prof. Wayne Xin Zhao||Renmin University of China|
|15:45-16:15||Exploring the Spectrum of Urban Lifestyles||Dr. Nicholas (Jing) Yuan||Miscrosoft Research Asia|
|16:15-16:45||Spatial community detection||Associate Prof. Yang Yue||Shenzhen University|
|16:45-17:05||Large Scale Retinal and Brain MRI Analysis for Early Detection of Cardiovascular Diseases||Prof. Rao Kotagiri
Associate Prof. Rui Zhang
|University of Melbourne|
|17:05-17:25||Selected Topics in Spatial and Temporal Data Analytics Research at University of Melbourne|
Talk 1: Replica Consistency Issuses in Wide Column Store
The wide column stores, such as Bigtable, Cassandra, HBase, are required to guarantee the data reliability, fault-tolerance and accessibility for users. The most common solution is that we store multiple copies of the same data in different storage devices. The multiple copies are called data replica. In this talk, we take Cassandra as an example to analyze the replica consistency mechanism in wide column stores. We model the writing propagation process among the replica with Petri net. Two types of queueing structures, sending queues and mutation queues, are identified as the determinants of the replica consistency. Some empirical studies have been done to verify our proposed consistency model.
Presenter: Jianmin Wang
Bio: Jianmin Wang is a Professor at School of Software of Tsinghua University, China. Professor Wang's research direction is data management and information system. He has done some research work on unstructured data management, work flow & BPM technology and Enterprise Information System. Currently his research focuses on concurrent process modelling in NoSQL system and process mining from large scale event log.
Other attendee(s) of the group: Xiangdong Huang (PhD student)
Talk 2: Recommending Products on Microbloging
Recent years have witnessed the great success of e-commerce companies such as Amazon and eBay. A widely used technique that companies adopt is to exploit the product recommendation system to improve user experience and enhance sales, which has attracted much attention from research communities. However, most of these studies focus on constructing the solutions within the online e-commerce Websites, which are largely limited by the information availability and design flexibility of the Website. In this talk, we present the development of METIS, a novel product recommender system based on the microblogging service. The main unique characteristics of the METIS system that distinguish it from traditional patent product recommenders are as follows: 1) We adopt the microblogging service as the platform to capture commercial intents and recommend products, which is able to capture users’ buying desires in the first time and utilize users’ profile data. 2) We propose a demographic based recommendation algorithm, which follows the flexible learning to rank framework by deriving features based on users profiles and product demographic. We present a novel method for extracting product demographic by leveraging knowledge from online social media. 3) We propose an effective method to collect training data for learning to rank algorithms. We evaluate the proposed methods on real microblog and e-commerce datasets. The experimental results show that the proposed techniques outperform the corresponding baseline methods.
Presenter: Wayne Xin Zhao
Bio: Wayne Xin Zhao is currently an Assistant Professor at the School of Information, Renmin University of China. He received the Ph.D. degree from Peking University in 2014. His research interests are web text mining and natural language processing. He was one of ten recipients of MSRA PhD Fellowship 2012. He has published about 20 referred papers in international conferences and journals such as ACL, EMNLP, COLING, ECIR, CIKM, SIGIR, SIGKDD, ACM TIST and IEEE TKDE. His current research focus is to improve e-commerce service with social data.
Other attendee(s) of the group: Prof. Jirong Wen
Talk 3: LifeSpec: Exploring the Spectrum of Urban Lifestyles
An incisive understanding of human lifestyles is not only essential to many scientific disciplines, but also has a profound business impact for targeted marketing. In this talk, we present LifeSpec, a computational framework for exploring and hierarchically categorizing urban lifestyles. Specifically, we have developed an algorithm to connect multiple social network accounts of millions of individuals and collect their publicly available heterogeneous behavioral data as well as social links. In addition, a nonparametric Bayesian approach is developed to model the lifestyle spectrum of a group of individuals. To demonstrate the effectiveness of LifeSpec, we conducted extensive experiments and case studies, with a large dataset we collected covering 1 million individuals from 493 cities. Our results suggest that LifeSpec offers a powerful paradigm for 1) revealing an individual’s lifestyle from multiple dimensions, and 2) uncovering lifestyle commonalities and variations of a group with various demographic attributes, such as vocation, education, gender, sexual orientation, and place of residence. The proposed method provides emerging implications for personalized recommendation and targeted advertising.
Presenter: Nicholas (Jing) Yuan
Bio: Nicholas (Jing) Yuan is currently an associate researcher in Microsoft Research Asia. He got a Ph.D degree in Computer Science from the School of Computer Science and Technology in 2012, and a B.S. degree in Mathematics from the School of the Gifted Young in 2007, both in University of Science and Technology of China. Currently, his research interests include behavioral data mining, spatial-temporal data mining and computational social science. During the past few years, Nicholas has published a series of papers in top-tier conferences and journals. His work has been featured by influential media such as MIT Technology Review many times. He has been honored with Microsoft Fellowship (2011), Best Paper Award of IEEE International Conference on Data Mining (2013), Best Paper Runner-up Award of ACM SIGSPATIAL (2010), and Distinguished Doctoral Dissertation Award of Chinese Academy of Sciences (2013).
Other attendee(s) of the group: Dr. Xing Xie
Talk 4: Spatial Community Detection
This talk summaries a part of the work based on our CCF-Tencent Open Fund, which focuses on detecting the spatial boundary of social network community. The aim of the work is to quantify the influence of spatial distance on online social networks. Both Tencent QQ (a strong-tie social network) and Sina Weibo (a weak-tie social network) data were examined. Results proved our understanding that, spatial distance has less impact on weak-tie social network structure than that of strong-tie social network. However, we found that the pattern of spatial distance on QQ friend lists and QQ contact friends are different. The QQ friend lists are strongly affected by administrative divisions; while the spatial boundary of QQ contact friends shows strong distance-decay effect. The findings have significant contribution on friend recommendation and POI recommendation.
Presenter: Yang Yue
Bio: Dr. Yang Yue is currently an Associate Professor with Department of Transportation Engineering, and Shenzhen key laboratory of spatial smart sensing and services, Shenzhen University. Before moving to Shenzhen University, she was with and State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University for about 5 years as an associate professor. She received the B. Eng and M.Eng, degrees in Surveying Engineering and GIS (Geographical Information System) from Wuhan Technical University of Surveying and Mapping, respectively, and the Ph.D. degree in Urban Transport from the University of Hong Kong. Her research interests include trajectory-based behavior analysis, traffic analysis, and GIS-T.
Other attendee(s) of the group: Prof. Qingquan Li
Talk 5: Large Scale Retinal and Brain MRI Analysis for Early Detection of Cardiovascular Diseases
Recent studies show that, cerebral White Matter Lesion (WML) is related to cerebrovascular diseases, cardiovascular diseases, dementia and psychiatric disorders. There is also evidence that pathologies in retina are closely related to Lesions in Brain MRI. The main goal is to develop a system that can be used for large scale screening for early detection of CVD. Manual segmentation of WML is not appropriate for long term longitudinal studies because it is time consuming and it shows high intra- and inter-rater variability. In this paper, a fully automated segmentation method is utilized to segment WML from brain Magnetic Resonance Imaging (MRI). The segmentation method uses a combination of global neighbourhood given contrast feature-based Random Forest (RF) classifier and Markov Random Field (MRF) to segment WML. To remove false positive lesions we use a rule based morphological post-processing operation. Quantitative evaluation of the proposed method was performed on 24 subjects of ENVIS-ion study. The segmentation results were validated against the manual segmentation performed by an experienced radiologist and was compared to a recently published WML segmentation method. The results show a dice similarity index of 0.75 for high lesion load, 0.71 for medium lesion load and 0.60 for low lesion load are achieved.
Presenter: Ramamohanarao (Rao) Kotagiri
Bio: Professor Rao Kotagiri received PhD from Monash University. He was awarded the Alexander von Humboldt Fellowship in 1983. He has been at the Uni. of Melb. since 1980 and was appointed as a professor in computer science in 1989. Rao held several senior positions including Head of Computer Science and Software Engineering, Head of the School of Electrical Engineering and Computer Science at the University of Melbourne and Research Director for the Cooperative Research Centre for Intelligent Decision Systems. He served or serving on the Editorial Boards of the Computer Journal, Universal Computer Science, TKDE, VLDBJ and International Journal on Data Privacy. He was the program Co-Chair for VLDB, PAKDD, DASFAA and DOOD. He is a steering committee member of ICDM, PAKDD. He received distinguished contribution award for Data Mining from PAKDD. Rao is a Fellow of the Institute of Engineers AU, a Fellow of Australian Academy Technological Sciences and Engineering and a Fellow of Australian Academy of Science. He was awarded Distinguished Contribution Award in 2009 by the Computing Research and Education Association of Australasia. He has published more than 350 articles and 48 PhD completions. He was the chair of ICDE 2013 and a co-chair of SIGMOD 2014.
Talk 6: Selected Topics in Spatial and Temporal Data Analytics Research at University of Melbourne
I will cover a few selected topics in the area of spatial and temporal data analytics being conducted at the University of Melbourne and highlight the challenges in big data in this area. The topics include solving data sparsity problem in destination prediction by GPS trajectories, computing earth mover’s distance similarity joins using MapReduce and easily implementable spatial index.
Presenter: Rui Zhang
Bio: Rui Zhang is an Associate Professor and Reader at the University of Melbourne and Assistant Dean (Collaboration) of Melbourne School of Engineering. He has been awarded the Future Fellowship by the Australian Research Council in 2012. He obtained his Bachelor's degree from Tsinghua University in 2001 and PhD from National University of Singapore in 2006. He has been a visiting scholar in AT&T Labs-Research and Microsoft Research before and is now a regular visiting researcher at Microsoft Research Asia in Beijing. He has authored 70 publications in prestigious conferences and journals. His research interest is spatial and temporal data analytics, as well as general database and mining techniques including indexing, moving object management, data streams and sequence databases. He regularly serves as PC members of top conferences in data management and mining such as SIGMOD, VLDB, ICDE and KDD. He is an associate editor of Distributed and Parallel Databases.
Other attendee(s) of the group: Dr. Jianzhong Qi, Zeyi Wen (PhD student)
Bio: Rui Zhang is an Associate Professor and Reader in the Department of Computing and Information Systems at the University of Melbourne and Assistant Dean (Collaboration) of Melbourne School of Engineering. He has been awarded the Future Fellowship by the Australian Research Council in 2012. He obtained his Bachelor's degree from Tsinghua University and PhD from National University of Singapore. He has been a visiting scholar in AT&T Labs-Research and Microsoft Research Redmond before and is now a regular visiting researcher at Microsoft Research Asia in Beijing. He has published extensively in the area of management and mining of big data, especially designing highly efficient and scalable algorithms.Key Positions
Bio: Jianmin Wang is a Professor and Deputy Dean of the School of Software, Tsinghua University. He has been awarded the National Outstanding Youth Fund by the National Natural Science Foundation of China in 2013. He is the director of the Institute of Information System & Engineering, Committee Member for China Computer Federation (CCF) Technical Committee on Databases (TCDB), Committee Member for CCF TC-PetriNet, Committee Member for National Key Technology Program of Core electronic devices, high-end general chips and fundamental software, Committee Member for Advanced Manufacturing Technology Domain, the National High-Tech R&D Program of China, and Committee Member for Overall Expert Group of Database Major Project, the National High-Tech R&D Program of China. He addresses fundamental problems in data management and information system, including unstructured data management, workflow management, product lifecycle management, database benchmark, mobile digital rights management and software watermarking, etc. He has published two translated books and over 140 technical papers, of which 100+ were indexed by EI, 30+ were indexed by SCIE.Key Positions
Bio: Jirong Wen is a Professor and Vice Dean of the School of Information, Renmin University of China (RUC). He was awarded the prestigious National “1000 Plan” Expert of China (Chinese equivalence of Australian Laureate Professor). He is the director of Big Data Research Centre and is leading the big data research and development efforts in RUC. His main research interest lies on big data management, information retrieval (especially Web search), data mining and machine learning. He is particularly interested in interdisciplinary research and developing massive data management systems. He received his Ph.D. degree from the Chinese Academy of Science. He joined Microsoft Research Asia (MSRA) as a researcher in 1999. He has been a senior researcher and group manager of the Web Search and Mining Group at MSRA since 2008. In the 14 years at MSRA, he has filed 50+ U.S. patents in Web search and related areas. Many of his research results have been integrated into important Microsoft products (e.g. Bing). His group has developed influential Web applications such as Microsoft Academic (academic.research.microsoft.com), Renlifang (renlifang.msra.cn), Microsoft Product Search, etc. He has published extensively on prestigious international conferences and journals. He is also very active in related academic communities and served as program committee members or chairs in many international conferences and workshops.Key Positions
Bio: Xing Xie is currently a senior researcher in Microsoft Research Asia, and a guest Ph.D. advisor for the University of Science and Technology of China. He received his B.S. and Ph.D. degrees in Computer Science from the University of Science and Technology of China in 1996 and 2001, respectively. He joined Microsoft Research Asia in July 2001, working on spatial data mining, location based services, social networks and ubiquitous computing. During the past years, he has published over 140 referred journal and conference papers. In recent years, he was involved in the program or organizing committees of over 70 conferences and workshops. He has more than 50 patents filed or granted. He has been invited to give keynote speeches at W2GIS 2011, HotDB 2012, SRSM 2012, etc. He is a member of Joint Steering Committee of the UbiComp and Pervasive Conference Series. He is a senior member of ACM, the IEEE, and China Computer Federation (CCF).Key Positions
Bio: Ramamohanarao (Rao) Kotagiri is a Professor of Computer Science in the Department of Computing and Information Systems at the University of Melbourne. He has been with the University of Melbourne since 1980 and held the professorial position since 1989. He was awarded Alexander Humboldt Fellowship in 1983 and was elected to a fellow of the Australian Academy of Science (FAA), the Australian Academy of Technological Sciences and Engineering (FTSE) and Engineers Australia (IEAust). He received his Bachelor's degree from Andhra University, Masters Degree in Engineering from Indian Institute of Science and PhD from Monash University. He held several senior positions at the University of Melbourne including: Head of the Department of Computer Science, Head of the School of Electrical and Computer Science, Deputy Dean (Research) and Deputy Dean of Engineering and he was one of the senior CIs of two ARC Centres of Excellence and one CRC centre of Excellence. For these centres he held positions as Deputy Director, Node Leader, and Research Director. He was the founding member of NICTA in Victoria, published more than 350 publications, and successfully supervised 44 PhD students. He was the chair of ICDE 2013 and a co-chair of SIGMOD 2014. Professor Kotagiri was awarded The IEEE ICDM Outstanding Service Award that is the highest recognition for service achievement in Data Mining.Key Positions
Bio: Chris Leckie is a Professor in the Department of Computing and Information Systems (CIS) and Deputy Director of the NICTA Victoria Research Laboratory. He has over two decades of research experience in artificial intelligence (AI), especially for telecommunication applications. In particular, he has developed efficient data mining techniques that are specifically designed to cope with high-dimensional and time-varying data streams, which are a major challenge in network intrusion detection. In the field of network intrusion detection, Prof Leckie has developed a range of highly scalable detection schemes for a variety of network attacks. His work on filtering denial-of-service attacks on the Internet (with Prof. Rao Kotagiri and Dr. Tao Peng) has been licensed to a local company (IntelliGuard I.T.) by the University of Melbourne, leading to a commercial product. He has also developed solutions for anomaly detection and event detection in wireless sensor networks. While at Telstra, he developed a number of techniques for alarm correlation and fault diagnosis, which were specifically designed to filter huge volumes of network performance data in an efficient and accurate manner. This research was used in several operational systems in Telstra. His research has been frequently published in leading journals and conferences such as ACM Computing Surveys, IEEE TKDE, Artificial Intelligence, ACM Transactions on Sensor Networks, IJCAI and ICML.Key Positions
Bio: James Bailey is a Professor and Australian Research Council (ARC) Future Fellow in the Department of Computing and Information Systems at the University of Melbourne. He has an extensive track record in databases and data mining and has been a chief investigator on multiple ARC discovery grants. He has been the recipient of four best paper awards and is an active member of the knowledge discovery community. He is an Associate Editor for the journals IEEE Transactions on Knowledge and Data Engineering, Knowledge and Information Systems and Social Network Analysis and Mining. He regularly serves as a Senior PC member for top conferences in data mining and he will be the co-general chair for CIKM 2015.Key Positions