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Addendum: Voxel-based, brain-wide association study of aberrant functional connectivity in schizophrenia implicates thalamocortical circuitry

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NPJ schizophrenia 2018年第1期4卷 19页

作者： Wei Cheng Lena Palaniyappan Mingli Li Keith M Kendrick Jie Zhang Qiang Luo Zening Liu Rongjun Yu Wei Deng Qiang Wang Xiaohong Ma Wanjun Guo Susan Francis Peter Liddle Andrew R Mayer Gunter Schumann Tao Li Jianfeng Feng Centre for Computational Systems Biology Fudan University Shanghai China. Centre for Translational Neuroimaging Division of Psychiatry and Applied Psychology Institute of Mental Health University of Nottingham Nottingham UK. The Mental Health Center and the Psychiatric Laboratory West China Hospital Sichuan University Chengdu China. Key Laboratory for Neuroinformation Ministry of Education of China School of Life Science and Technology University of Electronic Science and Technology of China Chengdu China. Institute of Mental Health Second Xiangya Hospital Central South University Changsha China. School of Psychology and Center for Studies of Psychological Application South China Normal University Guangzhou China. Sir Peter Mansfield MR Centre University of Nottingham Nottingham UK. The Mind Research Network Albuquerque USA. Medical Research Council-Social Genetic and Developmental Psychiatry Centre Institute of Psychiatry King's College London De Crespigny Park London UK. The Mental Health Center and the Psychiatric Laboratory West China Hospital Sichuan University Chengdu China. xuntao26@***. Centre for Computational Systems Biology Fudan University Shanghai China. jianfeng64@***. Department of Computer Science University of Warwick Coventry UK. jianfeng64@***. School of Life Science and the Collaborative Innovation Center for Brain Science Fudan University Shanghai China. jianfeng64@***.

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Optimal minimally constrained system in cooperative localization

Optimal minimally constrained system in cooperative localiza...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Ping Zhang Nan Yan Jun Zhang Chau Yuen Key Laboratory of Computer Application Technology Anhui Polytechnic University Wuhu China Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing China Singapore University of Technology and Design Singapore

ISBN: (纸本)9781467376884

In cooperative localization, minimally constrained system (MCS) refers to the minimal number of global (continuous) constraints which are indispensable for deriving node absolute locations. This paper investigates the optimality and practicability of the MCS. After deriving an optimal MCS and proving that the optimality depends on the node ground truth locations, a geometric approach to construct MCS is proposed. This approach “superimposes” the node relative locations onto a given reference, which achieves the optimality when the reference reaches the node ground truth locations. The geometrically constructed MCS can be applied to cooperative localization with rough prior locations, where the performance is confirmed in simulations and experiments.

关键词： Global Positioning System Distance measurement Maximum likelihood estimation Null space Electronic mail Noise measurement Wireless communication

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Research on the multidimensional educational review strategy Based on MOOCs Integrated by the multidimensional learning theory

Research on the multidimensional educational review strategy...

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2015 World Congress on Engineering and computer Science, WCECS 2015

作者： Ming, Li Ju, Zhang Jingzhong, Zhang Lian, Chen High Performance Computing Application R and D Center Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China Automated Reasoning and Cognition Key Laboratory of Chongqing Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China Laboratory for Automated Reasoning and Programming Chengdu Institute of Computer Applications Chinese Academy of Sciences Chengdu China

ISBN: (纸本)9789881925367

Through a detailed analysis of the theoretical basis for MOOCs in terms of educational learning theories, this paper attempts at finding the corresponding relationship between the theories and MOOCs, which not only theoretically explains the reasons why MOOCs exceed all the previous education models, but also empirically proves it with voluminous facts and data. The author conducts this research in the hope of enlightening the online education platform of other types. Besides, this paper provides the model framework and strategy to multidimensional educational review based on MOOCs. The model and strategy are applicable not only to MOOCs, the large-scale online education, but also to various online education platforms.

关键词： E-learning

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Temporal pattern of human post and interaction behavior in Qzone 6th

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6th International Conference on Swarm Intelligence, ICSI 2015 held in conjunction with the 2nd BRICS Congress on Computational Intelligence, CCI 2015

作者： Li, Bing Hu, Nan Wang, Wenjun Yuan, Ning School of Computer Science and Technology Tianjin University Tianjin300072 China Department of Basic Courses Academy of Military Transportation PLA Tianjin300161 China Tianjin Key Laboratory of Cognitive Computing and Application Tianjin300072 China Tianjin Emergency Medical Center Tianjin300011 China

ISBN: (纸本)9783319204710

The quantitative analysis of human pattern is an effective way to understand the complex social system. Relevant empirical studies reveal that human behavior in time follow a power-law distribution rather than a Poisson distribution. This paper aims at conducting statistical analyses based on the records of Qzone posts and interactive messages. The results show that the interevent time distribution of posts and interaction follows a power-law distribution. Additionally, the time intervals of post comments differ from the time intervals of interact and in that there exists a clear cut-off point in the distribution of posting time, which indicates the subjection to a two-stage power-law. At the individual level, the posting time distribution exhibits fat tails. The analysis of post behavior indicates that there is a monotonous and negative relationship between the activity level and power-law exponent. The characteristics of local peaks also illustrate the burstiness and memory of post behavior. © Springer International Publishing Switzerland 2015.

关键词： Poisson distribution

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An empirical analysis on temporal pattern of credit card trade 6th

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6th International Conference on Swarm Intelligence, ICSI 2015 held in conjunction with the 2nd BRICS Congress on Computational Intelligence, CCI 2015

作者： Zhao, Bo Wang, Wenjun Xue, Guixiang Yuan, Ning Tian, Qiang School of Computer Software Tianjin University Tianjin300072 China School of Computer Science and Technology Tianjin University Tianjin300072 China Tianjin Key Laboratory of Cognitive Computing and Application Tianjin300072 China Deparment of Basic Courses Academy of Military Transportation PLA Tianjin300161 China School of Computer Science and Software Hebei University of Technology Tianjin300130 China Office of the President Tianjin Normal University Tianjin300387 China

ISBN: (纸本)9783319204710

Credit card swiping is the behavior which people make a deal in POS with credit card. It is one of the simplest credit services. To research credit card swiping is helpful to understand temporal pattern of credit card swiping. In traditional views, human group behavior is random, irregular. However, the latest research presents that some human behaviors are predictable. Nowadays, researchers are analyzing different types of human behavior with human behavior dynamics methods. In this paper, we analyze credit card swiping temporal pattern. The empirical data is from a bank in Tianjin China. We analyze intercredit time, and memory and burstiness phase diagram (M, B). Inter-credit time follows power-law distribution, and (M, B) mean value is at the range of human behavior (M, B) value. © Springer International Publishing Switzerland 2015.

关键词： Behavioral research

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Depth Enhancement Based on Fusion of Total Variation Model and Colour Information

Depth Enhancement Based on Fusion of Total Variation Model a...

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2015 International Conference on Software, Multimedia and Communication Engineering(SMCE 2015)

作者： Yun GE Yan-feng SUN Xing-lin PIAO Bao-cai YIN Beijing Key Laboratory of Multimedia and Intelligent Software Technology College of Metropolitan Transportation Beijing University of Technology Computer Science and Application Center China Youth University for Political Science

Disturbed by the external environment, the depth map obtained by consumer RGB-D equipment usually has the problem of low-resolution, noisy and miss values as some pixels. In order to enhance the quality of depth map, we proposed an efficient method to enhance the quality based on total variation model. To achieve high quality image enhancement, we infliction the color information derived from color image and smoothness constrain to guide the enhance work. The experiment results show that the proposed method can get high quality enhance result.

关键词： Total variation Depth map Depth enhancement

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An improved method for exon array data analysis

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Chemical Engineering Transactions 2015年 46卷 379-384页

作者： Jin, Shenghua School of Computer Engineering Huaiyin Institute of Technology Huaian Jiangsu China Huaian Key Laboratory of the Study and Application of Internet of Things Huaian Jiangsu China Jiangsu Internet of Things Mobile Internet Technology Engineering Laboratory Huaian Jiangsu223003 China

ISBN: (纸本)9788895608372

Alternative splicing of genes is usually induced by some severe diseases. Exon array manufactured by Affymetrix Company has been widely used to detect alternative splicing. Utilizing the mapping between the gray values of splice isoforms and the array probes, we proposed the calculation of gene expression level based on Kseq model. Aiming at the massive amount of array data, an algorithm for parallel computation using multi-core processor was presented. The algorithm was verified through experiments using real datasets and compared with the commonly used algorithm. It was found that parallel computation improved the computation efficiency of the model and the new model enhanced the computation accuracy in subsequent bioanalysis. Copyright © 2015, AIDIC Servizi S.r.l.

关键词： Gene expression

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Context-aware computing for smart home environment

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Journal of Computational Information Systems 2015年第15期11卷 5453-5460页

作者： Liu, Li Fu, Xiaodong Liu, Lijun Huang, Qingsong Yunnan Provincial Key Laboratory of Computer Technology Application Faculty of Information Engineering and Automation Kunming University of Science and Technology Kunming China State-Province Joint Laboratory of Digital Home Interactive Applications School of Information Science & Technology Sun Yat-sen University Guangzhou China

Context-aware computing has proven to be successful in collecting and understanding various sensor data. However, providing an intelligent service by exploiting the collected context data from heterogeneous sensors is difficult on smart home because it is a complex environment with various devices and appliances. In this paper, we propose a context-aware computing approach for heterogeneous smart home environments. The key idea in this work is to integrate large-scale home context information from multiple heterogeneous sensors. We first define a semantic decision by context-aware inference including rule, inference and pattern driven. Then, a designed architecture that manages home environment is developed between large numbers of heterogeneous information entities and enhances intelligence abilities. Using the established rules and inferences, the proposed method is applicable for intelligent home to further discover more useful representative activities and personalized services with inhabitant needs. Experimental results show the effectiveness of our proposed method. Copyright © 2015 Binary Information Press.

关键词： Semantics

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Evolution of isolated G-band bright points: size, intensity and velocity

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Research in Astronomy and Astrophysics 2014年第6期14卷 741-752页

作者： Yun-Fei Yang Jia-Ben Lin Song Feng Kai-Fan Ji Hui Deng Feng Wang Faculty of Information Engineering and Automation/Yunnan Key Laboratory of Computer Technology Application Kunming University of Science and Technology Key Laboratory of Solar Activity National Astronomical Observatories Chinese Academy of Sciences Key Laboratory of Modern Astronomy and Astrophysics Nanjing University Ministry of Education

We study the evolution pattern of isolated G-band bright points （GBPs） in terms of their size, intensity and velocity. Using a high resolution image sequence taken with the Hinode/Solar Optical Telescope （SOT）, we detect GBPs in each image by the Laplacian and Morphological Dilation algorithm, and track their evolutions by a 26-adjacent method in a three-dimensional space-time cube. For quantifying the evolution, we propose a quantification method based on lifetime normalization which aligns the different lifetimes to common stages. The quantification results show that, on average, the diameter of isolated GBPs changes from 166 to 173 km, then down to 165 km; the maximum intensity contrast changes from 1.012 to 1.027, then down to 1.011; however, the velocity changes from 1.709 to 1.593 km s-1, then up to 1.703 km s-i. The results indicate that the evolution follows a pattern such that the GBP is small, faint and fast-moving at the birth stage, becomes big, bright and slow-moving at the middle stage, then gets small, faint and fast-moving at the decay stage until disappearance. Although the differences are very small, a two-sample t-test is used to demonstrate there are significant differences in means between the distri- butions of the different stages. Furthermore, we quantify the relationship between the lifetimes of GBPs and their properties. It is found that there are positive correlations between the lifetimes and their sizes and intensities with correlation coefficients of 0.83 and 0.65, respectively; however, there is a negative correlation between the life- times and velocities with a correlation coefficient of-0.49. In summary, the longer the GBP persists, the bigger, brighter and slower it will be.

关键词： techniques： image processing -- Sun： photosphere -- methods： dataanalysis -- methods： statistical

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Recommendation of programming problems in online judge platform: an experimental research

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Journal of Computational Information Systems 2015年第20期11卷 7263-7270页

作者： Yu, Ruiguo Li, Yongxing Cai, Zhiyong Dong, Xuyuan He, Muwen Chang, Peng Wang, Zan School of Computer Science and Technology Tianjin University Tianjin China Tianjin Key Laboratory of Cognitive Computing and Application Tianjin China Information and Network Center Tianjin University Tianjin China School of Computer and Software Tianjin University Tianjin China

The explosive growth of the internet and the emergence of e-commerce have given rise to the fast development of recommendation algorithms-a kind of personalized information collection technology used to gather a set of items that meet the interest of a certain amount of persons. Recommendation systems based on collaborative filtering algorithms are one of the most widely adopted and successful online recommendation services. However, the successful operation of every online recommendation service in a particular application field requires careful experimental research and parameterization before their actual running. Our work in this paper is an experimental research of programming problems recommendation in online judge platform for further establishment of a programming problems recommendation system. In this study, we analyze the performance of collaborative filtering recommendation algorithms on data set of online judge platform. Moreover, different similarity calculation methods and cluster-based data smoothing technique are also evaluated in our research to determine whether they are suitable for programming problems recommendation. Copyright © 2015 Binary Information Press.

关键词： Collaborative filtering

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