检索结果-内蒙古大学图书馆

2013 5th International Conference on Computational and information sciences, ICCIS 2013

作者： Zou, Le Li, Changwen Xie, Jin Li, Chuanlin Key Lab of Network and Intelligent Information Processing Hefei University Hefei China Department of Mathematics Huaibei Normal University Huaibei China Department of Mathematics and Physics Hefei University Hefei China Department of Computer Science and Technology Hefei University Hefei China

ISBN: (纸本)9780769550046

By introducing partial divided differences and partial inverse differences, bivariate symmetry associated continued fractions blending rational interpolation is constructed. We discuss the recursive algorithm, interpolation theorem and error estimation. We extend the conclusion to vector valued, matrix valued cases and the triangular net case. © 2013 IEEE.

关键词： Blending

来源：评论

学校读者我要写书评

暂无评论

Robust median reversion strategy for on-line portfolio selection

Robust median reversion strategy for on-line portfolio selec...

引用

23rd International Joint Conference on Artificial Intelligence, IJCAI 2013

作者： Huang, Dingjiang Zhou, Junlong Li, Bin Hoi, Steven C.H. Zhou, Shuigeng Department of Mathematics East China University of Science and Technology Shanghai 200237 China School of Computer Science Fudan University Shanghai 200433 China Shanghai Key Lab of Intelligent Information Processing Fudan University Shanghai 200433 China School of Computer Engineering Nanyang Technological University Singapore 639798 Singapore

ISBN: (纸本)9781577356332

On-line portfolio selection has been attracting increasing interests from artificial intelligence community in recent decades. Mean reversion, as one most frequent pattern in financial markets, plays an important role in some state-of-the-art strategies. Though successful in certain datasets, existing mean reversion strategies do not fully consider noises and outliers in the data, leading to estimation error and thus non-optimal portfolios, which results in poor performance in practice. To overcome the limitation, we propose to exploit the reversion phenomenon by robust L1-median estimator, and design a novel on-line portfolio selection strategy named "Robust Median Reversion" (RMR), which makes optimal portfolios based on the improved reversion estimation. Empirical results on various real markets show that RMR can overcome the drawbacks of existing mean reversion algorithms and achieve significantly better results. Finally, RMR runs in linear time, and thus is suitable for large-scale trading applications.

关键词： Estimation

来源：评论

学校读者我要写书评

暂无评论

Kinetics and Modeling of Chemical Leaching of Sphalerite Concentrate Using Ferric Iron in a Redox-controlled Reactor

引用

Chinese Journal of Chemical Engineering 2013年第8期21卷 933-936页

作者：宋健高玲林建群吴洪斌林建强 State Key Lab of Microbial Technology Shandong University Department of Pharmacy and Biotechnology Zibo Vocational Institute Shandong Provincial Key Lab for Distributed Computer Software Novel Technology School of Information Science and EngineeringShandong Normal University Institute of Agro-products Processing Science and Technology Xinjiang Academy of Agricultural and Reclamation Science

This work presents a study for chemical leaching of sphalerite concentrate under various constant Fe3+ concentrations and redox potential conditions. The effects of Fe3+ concentration and redox potential on chemical leaching of sphalerite were investigated. The shrinking core model was applied to analyze the experimental results. It was found that both the Fe3+ concentration and the redox potential controlled the chemical leaching rate of sphalerite. A new kinetic model was developed, in which the chemical leaching rate of sphalerite was proportional to Fe3+ concentration and Fe3+ /Fe2+ ratio. All the model parameters were evaluated from the experimental data. The model predictions fit well with the experimental observed values.

关键词： sphalerite leaching kinetic model Fe3＋ concentration redox potential labVIEW

来源：评论

学校读者我要写书评

暂无评论

Changes in V1 orientation tuning when blocking astrocytic glutamate transporters: models for extra- and intrasynaptic mechanisms

引用

BMC Neuroscience 2013年第1期14卷 1-2页

作者： Konstantin Mergenthaler Dipanjan Roy Klaus Obermayer Jeremy Petravicz Mriganka Sur Neural Information Processing School of Computer Science and Electrical Engineering and Bernstein Center for Computational Neurocience Technische Universität Berlin Germany Department of Brain and Cognitive Sciences Piclower Institut for Learning and Memory Massachusetts Institute of Technology Cambridge Massachusetts USA

来源：评论

学校读者我要写书评

暂无评论

Rumor evolution in social networks

引用

Physical Review E 2013年第3期87卷 032133-032133页

作者： Yichao Zhang Shi Zhou Zhongzhi Zhang Jihong Guan Shuigeng Zhou Department of Computer Science and Technology Tongji University 4800 Cao'an Road Shanghai 201804 China Department of Computer Science University College London Gower Street London WC1E 6BT United Kingdom School of Computer Science Fudan University Shanghai 200433 China Shanghai Key Lab of Intelligent Information Processing Fudan University Shanghai 200433 China

The social network is a main tunnel of rumor spreading. Previous studies concentrated on a static rumor spreading. The content of the rumor is invariable during the whole spreading process. Indeed, the rumor evolves constantly in its spreading process, which grows shorter, more concise, more easily grasped, and told. In an early psychological experiment, researchers found about 70% of details in a rumor were lost in the first six mouth-to-mouth transmissions. Based on these observations, we investigate rumor spreading on social networks, where the content of the rumor is modified by the individuals with a certain probability. In the scenario, they have two choices, to forward or to modify. As a forwarder, an individual disseminates the rumor directly to their neighbors. As a modifier, conversely, an individual revises the rumor before spreading it out. When the rumor spreads on the social networks, for instance, scale-free networks and small-world networks, the majority of individuals actually are infected by the multirevised version of the rumor, if the modifiers dominate the networks. The individuals with more social connections have a higher probability to receive the original rumor. Our observation indicates that the original rumor may lose its influence in the spreading process. Similarly, a true information may turn out to be a rumor as well. Our result suggests the rumor evolution should not be a negligible question, which may provide a better understanding of the generation and destruction of a rumor.

关键词： SOCIAL networks PROBABILITY theory RUMOR information theory SOCIAL groups MOUTH-to-mouth resuscitation

来源：评论

学校读者我要写书评

暂无评论

Finding Dominating Set from Verbal Contextual Graph for Personalized Search in Folksonomy

Finding Dominating Set from Verbal Contextual Graph for Pers...

引用

IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Ting Jin Haoran Xie Jingsheng Lei Qing Li Xiaodong Li Xudong Mao Yanghui Rao Shanghai Key Lab of Intelligent Information Processing Fudan University Shanghai China Department of Computer Science City University of Hong Kong China College of Computer Science & Technology Shanghai University of Electric Power Shanghai China

With the development of the Internet, user-generated data has been growing tremendously in Web 2.0 era. Facing such a big volume of resources in folksonomy, people need a method of fast exploration and indexing to find their demanded data. To achieve this goal, contextual information is indispensable and valuable to understand user preference and purpose. In sociolinguistics, context can be mainly categorized as verbal context and social context. Comparing with verbal context, social context not only requires domain knowledge to pre-define contextual attributes but also acquires additional data from users. However, there is no research of addressing irrelevant contextual factors for verbal context model so far. The dominating set from verbal context proposed in this paper is to fill this blank. We present the verbal context in folksonomy to capture the user intention, and propose a dominating set discovering method for this verbal context model to prune the irrelevant contextual factors and keep the major characteristics at the same time. Furthermore, the experiments, which are conducted on a public data set, show that the proposed method gives convincing results.

关键词： Context Context modeling Vectors Motion pictures Measurement Mood Semantics

来源：评论

学校读者我要写书评

暂无评论

Random walks on weighted networks

引用

Physical Review E 2013年第1期87卷 012112-012112页

作者： Zhongzhi Zhang Tong Shan Guanrong Chen School of Computer Science Fudan University Shanghai 200433 China Shanghai Key Lab of Intelligent Information Processing Fudan University Shanghai 200433 China Department of Electronic Engineering City University of Hong Kong Hong Kong SAR China

Random walks constitute a fundamental mechanism for a large set of dynamics taking place on networks. In this article, we study random walks on weighted networks with an arbitrary degree distribution, where the weight of an edge between two nodes has a tunable parameter. By using the spectral graph theory, we derive analytical expressions for the stationary distribution, mean first-passage time (MFPT), average trapping time (ATT), and lower bound of the ATT, which is defined as the average MFPT to a given node over every starting point chosen from the stationary distribution. All these results depend on the weight parameter, indicating a significant role of network weights on random walks. For the case of uncorrelated networks, we provide explicit formulas for the stationary distribution as well as ATT. Particularly, for uncorrelated scale-free networks, when the target is placed on a node with the highest degree, we show that ATT can display various scalings of network size, depending also on the same parameter. Our findings could pave a way to delicately controlling random-walk dynamics on complex networks.

关键词： RANDOM walks (Mathematics) GRAPH theory PROBABILITY theory EQUATIONS DIFFUSION WEIGHT (Physics)

来源：评论

学校读者我要写书评

暂无评论

Screening of potential pseudo att sites of Streptomyces phage ΦC31 integrase in the human genome

引用

中国药理学报（英文版） 2013年第4期34卷 561-569页

作者： Zhi-peng HU Lu-sheng CHEN Cai-yan JIA Huan-zhang ZHU Wei WANG Jiang ZHONG Department of Microbiology and Microbial Engineering School of Life Sciences Fudan University Shanghai 200433 China Intelligent Information Processing Lab Department of Computer Science Fudan University Shanghai 200433 China State Key Laboratory of Genetic Engineering Institute of Genetics School of Life Science Fudan University Shanghai 200433 China Molecular & Cellular Biology Baylor College of Medicine Houston TX USA

Aim:φC31 integrase mediates site-specific recombination between two short sequences, attP and attB, in phage and bacterial genomes, which is a promising tool in gene regulation-based therapy since the zinc finger structure is probably the DNA recognizing domain that can further be engineered. The aim of this study was to screen potential pseudo att sites of (I)C31 integrase in the human genome, and evaluate the risks of its application in human gene therapy. Methods: TFBS (transcription factor binding sites) were found on the basis of reported pseudo att sites using multiple motif-finding tools, including AlignACE, BioProspector, Consensus, MEME, and Weeder. The human genome with the proposed motif was scanned to find the potential pseudo att sites ofφC31 integrase. Results: The possible recognition motif ofφC31 integrase was identified, which was composed of two co-occurrence conserved elements that were reverse complement to each other flanking the core sequence TTG. In the human genome, a total of 27924 potential pseudo att sites ofφC31 integrase were found, which were distributed in each human chromosome with high-risk specificity values in the chromosomes 16, 17, and 19. When the risks of the sites were evaluate more rigorously, 53hits were discovered, and some of them were just the vital functional genes or regulatory regions, such as ACYP2, AKR1B1, DUSP4, etc. Conclusion: The results provide clues for more comprehensive evaluation of the risks of usingφC31 integrase in human gene therapy and for drug discovery.

关键词： gene therapy ΦC31 integrase pseudo attP human genome motif finding drug discovery

来源：评论

学校读者我要写书评

暂无评论

Evaluation of literature frontier based on latent semantic analysis

Evaluation of literature frontier based on latent semantic a...

引用

2012 IEEE Symposium on Robotics and Applications, ISRA 2012

作者： Yin, Panpan Cui, Rongyi Intelligent Information Processing Lab. Department of Computer Science and Technology Yanbian University Yanji China

ISBN: (纸本)9781467322072

In this paper, a literature frontier evaluation method based on latent semantic analysis was proposed in terms of collection of front keywords and the surface information of literature. Firstly, to build the collection of front keywords, the frontier metric of keyword was studied for evaluating the frontier of keyword. Secondly, the collection of front literatures was achieved according to the built collection of front keywords and the latent semantic space of front literatures was built in terms of the front literatures' surface information such as title, keywords and abstract. Finally, the frontier of new literature was evaluated in terms of the frontier of each front literature, the semantic relevance with each front literature, and the impact factor of the journal which the new literature belonged to. The experimental results show that the collection of front keywords built by proposed frontier metric outperforms the academic hotspots achieved by the existing research platform of academic hotspots, and the proposed method is proved to be reasonable with the positive correlation between the frontier score of new literature and each of the impact factor of journal and the published year of literature. © 2012 IEEE.

关键词： Semantics

来源：评论

学校读者我要写书评

暂无评论

Structure based modern Korean character set partitioning and pre-classification method of korean character recognition

Structure based modern Korean character set partitioning and...

引用

2012 International Conference on computer science and information processing, CSIP 2012

作者： Piao, Mingji Kim, Sejin Cui, Rongyi Intelligent Information Processing Lab. Department of Computer Science and Technology Yanbian University Yanji China

ISBN: (纸本)9781467314114

With respect to practical Korean documents, structure characteristics and structure classification of Korean character and a new pre-classification method of character recognition were studied in this paper. Firstly, the concept of character structure distance and its simple calculation method were proposed to describe the difference between structures, according to the unique linearizability of each character and the occurrence of basic graphemes. Furthermore, based on ID3 algorithm and the information gain of graphemes, the decision tree of structure classification was constructed. Finally, a decision tree based pre-classification algorithm was designed for printed character recognition. The experimental results show that basic graphemes v2, c3, v3 and v1 or c4 possess high contribution for character pre-classification, and the proposed method has reliable theoretical foundation and effective classification performance. © 2012 IEEE.

关键词： Character recognition

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：