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2014 Asia-Pacific Computer science and Application Conference(CSAC 2014)

作者： Min Tang Min Wu Guoqiang Deng Shanghai Key Lab of Trustworthy Computing Software Engineering InstituteEast China Normal University School of Mathematics & Computing Science Guilin University of Electrical Technology

In this paper,we present an interval method to test existence and uniqueness of solutions to the initial value problem of ODEs,and an iterative computational test is proposed to compute validated solutions of *** with classical methods,the interval method not only returns an approximate solution but also an interval that is guaranteed to contain exact solutions of the *** experiments show the effectiveness of the validated method.

关键词： A Validated Method Of Solving Initial Value Problem For ODEs

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Quadrature formula for evaluating left bounded Hadamard type hypersingular integrals

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AIP Conference Proceedings 2014年第1期1635卷 395-402页

作者： Sirajo Lawan Bichi Z. K. Eshkuvatov N. M. A. Nik Long Abdurahim Okhunov Department of Mathematics Faculty of Science Universiti Putra Malaysia (UPM) and Department of Mathematics Faculty of Science Bayero University Kano (B.U.K) Niger Department of Mathematics Faculty of Science Universiti Putra Malaysia (UPM) and Laboratory of Computational Sciences and Mathematical Physics Institute for Mathematical Research UPM Malaysia Department of Science in Engineering Kulliyyah of Engineering International Islamic Univeristi Malaysia

Left semi-bounded Hadamard type Hypersingular integral (HSI) of the form H(h,x) = 1π1+x1−x ∫ −1**11−t1+th(t)(t−x)2dt,x∈(−1.1), Where h(t) is a smooth function is considered. The automatic quadrature scheme (AQS) is constructed by approximating the density function h(t) by the truncated Chebyshev polynomials of the fourth kind. Numerical results revealed that the proposed AQS is highly accurate when h(t) is choosing to be the polynomial and rational functions. The results are in line with the theoretical findings.

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An Error Analysis for the Finite Element Approximation to the Steady-State Poisson-Nernst-Planck Equations

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Advances in Applied mathematics and Mechanics 2013年第1期5卷 113-130页

作者： Ying Yang Benzhuo Lu Department of Computational Science and Mathematics Guilin University of Electronic TechnologyGuilin 541004GuangxiChina LSEC Institute of Computational Mathematics and Scientific/Engineering Computingthe National Center for Mathematics and Interdisciplinary SciencesAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

Poisson-Nernst-Planck equations are a coupled system of nonlinear partial differential equations consisting of the Nernst-Planck equation and the electrostatic Poisson equation with delta distribution sources,which describe the electrodiffusion of ions in a solvated biomolecular *** this paper,some error bounds for a piecewise finite element approximation to this problem are *** numerical examples including biomolecular problems are shown to support our analysis.

关键词： Poisson-Nernst-Planck equations finite element method error bounds

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First results on the excited states in 77Cu

First results on the excited states in 77Cu

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作者： Sahin, E. Bello Garrote, F.L. Görgen, A. De Angelis, G. Niikura, M. Nishimura, S. Mengoni, D. Xu, Z. Baba, H. Browne, F. Doornenbal, P. Franchoo, S. Guillaume, G. Isobe, T. John, P.R. Jung, H.S. Hadyńska-Klȩk, K.K. Li, Z. Lorusso, G. Matea, I. Matsui, K. Morfouace, P. Napoli, D.R. Nishibata, H. Odahara, A. Sakurai, H. Söderström, P.-A. Sohler, D. Stefan, I. Sumikama, T. Suzuki, D. Taniuchi, R. Taprogge, J. Vajta, Z. Watanabe, H. Werner, V. Wu, J. Yagi, A. Yoshinaga, K. University of Oslo Department of Physics Oslo Norway INFN Laboratori Nazionale di Leganro Padova Italy Dept. of Physics University of Tokyo Hongo 7-3-1 Bunkyo-ku Tokyo113-0033 Japan RIKEN Nishina Center 2-1 Hirosawa Wako Saitama351-0198 Japan INFN Sez. di Padova Dipartimento di Fisica Univ. di Padova Padova Italy University of Hong Kong Hong Kong Hong Kong School of Computing Engineering and Mathematics Univ. of Brighton BrightonBN2 4GJ United Kingdom IN2P3-CNRS Univ. Paris-Sud 11 Orsay Cedex91406 France LPSC Universite Joseph Fourier CNRS/IN2P3 Institut National Polytechnique de Grenoble France Dept. of Physics University of Notre Dame Notre DameIN46556 United States Dept. of Physics Peking University Beijing100871 China Dept. of Physics Osaka Univ. 1-1 Machikaneyama Toyonaka Osaka560-0043 Japan Institute for Nuclear Research of the Hungarian Academy of Sciences Debrecen4001 Hungary Dept. of Physics Tohoku University 6-3 Aramaki-Aoba Aoba Sendai980-8578 Japan Instituto de Estructura de la Materia CSIC Madrid28006 Spain International Research Center for Nuclei and Particles in the Cosmos Beihang University Beijing China Wright Nuclear Structure Laboratory Yale University New HavenCT06520-8120 United States Institut für Kernphysik Technische Universität Darmstadt Darmstadt64289 Germany Dept. of Physics Tokyo Univ. of Science 2641 Yamazaki Noda Chiba278-8510 Japan

The level structure of the 77Cu nucleus has been studied by means of β-delayed γ-ray spectroscopy at RIKEN Nishina Center. Secondary beam particles in the region near 78Ni were produced via in-flight fission of 238U on a thick 9Be target at a primary beam energy of 345 MeV/nucleon. After identification in atomic number (Z) and mass-to-charge ratio (A/Q) in the BigRIPS fragment separator, the fission products were delivered to the final focal plane through the ZeroDegree Spectrometer. The WAS3ABI silicon stack array was used for the implantation of the ions, while de-excitation γ rays were detected with the EURICA γ-ray spectrometer at the focal plane. Beta-correlated particle identification of 77Ni allowed to obtain the γ-ray spectrum of the daughter 77Cu in a selective way. Experimental details and first results on the excited states in 77Cu nucleus will be presented in this contribution.

关键词： Excited states

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Classification system for mortgage arrear management

Classification system for mortgage arrear management

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Proceedings of the IEEE/IAFE computational Intelligence for Financial engineering (CIFEr)

作者： Z. Sun M. A. Wiering N. Petkov Johann Bernoulli Institute of Mathematics and Computing Science University of Groningen Groningen the Netherlands Institute of Artificial Intelligence and Cognitive Engineering University of Groningen Groningen the Netherlands

Due to the economic recession in the recent years, more and more mortgage customers default on the payments. This brings tremendous losses to banks and forces their arrear management departments to develop more efficient processes. In this paper, we propose a classification system to predict the outcome of a mortgage arrear. Each customer who delays a monthly mortgage rate payment is assigned a label with two possible values: a delayer, who will pay the rate before the end of the month, and a defaulter, who will fail to do so. In this way, the arrear management department only needs to treat defaulters intensively. We use arrear history records obtained from a data warehouse of one Dutch bank. We apply basic classifiers, ensemble methods and sampling techniques to this classification problem. The obtained results show that sampling techniques and ensemble learning improve the performance of basic classifiers considerably. We choose balanced random forests to build the ultimate classification system. The resulting system has already been deployed in the daily work of the arrear management department of the concerned bank, and this leads to huge cost savings.

关键词： Loans and mortgages Bagging Logistics Bars Measurement Decision trees Banking

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A Stochastic Maximum Principle for Risk-Sensitive Mean-Field-Type Control

A Stochastic Maximum Principle for Risk-Sensitive Mean-Field...

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IEEE Annual Conference on Decision and Control

作者： Boualem Djehiche Hamidou Tembine Raul Tempone Department of Mathematics KTH Royal Institute of Technology Stockholm Sweden SRI Uncertainty Quantification Center in Computational Science and Engineering CEMSE KAUST KSA

ISBN: (纸本)9781467360890

In this paper we study mean-field type control problems with risk-sensitive performance functionals. We establish a stochastic maximum principle for optimal control of stochastic differential equations of mean-field type, in which the drift and the diffusion coefficients as well as the performance functional depend not only on the state and the control but also on the mean of the distribution of the state. Our result extends to optimal control problems for non-Markovian dynamics which may be time-inconsistent in the sense that the Bellman optimality principle does not hold. For a general action space a Peng's type stochastic maximum principle is derived, specifying the necessary conditions for optimality. Two examples are carried out to illustrate the proposed risk-sensitive mean-field type under linear stochastic dynamics with exponential quadratic cost function. Explicit characterizations are given for both mean-field free and mean-field risk-sensitive models.

关键词： Equations Stochastic processes Optimal control Process control Mathematical model Couplings Yttrium

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Variational Image Decomposition in Shearlet Smoothness Spaces

Variational Image Decomposition in Shearlet Smoothness Space...

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International Conference on computational Intelligence and Security

作者： Min Li Xiaoli Sun Chen Xu College of Mathematics and Computational Science Shenzhen University Shenzhen Guangdong P. R. China Institute of Intelligent Computing Science Shenzhen University Shenzhen Guangdong P. R. China

ISBN: (纸本)9781479974351

Shearlet representation has gained more prominence in recent year as a flexible mathematical framework which enables the efficient analysis of anisotropic phenomena by combining multiscale analysis with the ability to handle directional information. Based on this, we present a new variational model for image decomposition in shearlet smoothness spaces. The new model can be seen as generalizations of Daubechies -Teschke's model. By replacing the Besov regularization term by a shearlet-based regularization term, and writing the problem in a shearlet framework, we obtain elegant shearlet shrinkage schemes. The experiments on decomposition of images show that our algorithm is very efficient.

关键词： Noise measurement Image decomposition Mathematical model Noise reduction Minimization PSNR

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A New Analysis on the Barzilai-Borwein Gradient Method

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Journal of the Operations Research Society of China 2013年第2期1卷 187-198页

作者： Yu-Hong Dai State Key Laboratory of Scientific and Engineering Computing Institute of Computational Mathematics and Scientific/Engineering ComputingAcademy of Mathematics and Systems ScienceChinese Academy of SciencesP.O.Box 2719Beijing 100190P.R.China

Due to its simplicity and efficiency,the Barzilai and Borwein(BB)gradi-ent method has received various attentions in different *** paper presents a new analysis of the BB method for two-dimensional strictly convex quadratic *** analysis begins with the assumption that the gradient norms at the first two iterations are *** show that there is a superlinear convergence step in at most three consecutive ***,we provide a better convergence relation for the BB *** influence of the starting point and the condition number to the convergence rate is comprehensively addressed.

关键词： Unconstrained optimization Barzilai and Borwein gradient method Quadratic function R-superlinear convergence Condition number

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A Substructuring Preconditioner for Three-Dimensional Maxwell's Equations

Lecture Notes in Computational Science and Engineering

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Lecture Notes in computational science and engineering 2013年 91卷 73-84页

作者： Hu, Qiya Shu, Shi Zou, Jun LSEC Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and Systems Science The Chinese Academy of Sciences Beijing 100080 China School of Mathematics and Computational Science Xiangtan University Hunan 411105 China Department of Mathematics The Chinese University of Hong Kong Shatin N.T. Hong Kong

ISBN: (纸本)9783642352744

We propose a new nonoverlapping domain decomposition preconditioner for the discrete system arising from the edge element discretization of the three-dimensional Maxwell's equations. This preconditioner uses the simplest coarse edge element space induced by the coarse triangulation. We will show that the rate of the PCG convergence with this substructuring preconditioner is quasi-optimal, and is independent of large variations of the coefficients across the local interfaces. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Maxwell equations

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Reputation Monitoring over Rule-stringent Social Media based on Advanced Wrapper Technologies

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Procedia - Social and Behavioral sciences 2014年 148卷 559-566页

作者： Klimis Ntalianis Nikolaos Papadakis Petros Tomaras Technological Educational Institute of Athens Department of Marketing – Online Computing Group 12210 Egaleo Athens GREECE Hellenic Army Academy Faculty of Mathematics and Engineering Science 16673 Vari Athens GREECE

The so-called real-time web (RTW) is a web of opinions, comments, and personal viewpoints, providing personalized commentary in real-time. Facebook is undoubtedly the king of the RTW. It boasts 1+ billion users that spend about 23 billion minutes per day, generating in the region of 60 million posts per day. This RTW data is far from structured (in contrast to data such as ratings, product features, etc.), but it is very useful to consider for reputation monitoring. For enterprises in particular, being present and aware of what is discussed on social media about their products and services has become a must. It allows them to establish a communication channel with their customers, market their products, build brand equity and boost clientele faithfulness. However, as social media are two-way channels, they require effort and care to manage this communication. Dissatisfied customers can protest out loud, easily influence many other customers and damage the brand's image. In order to avoid these risks, several social media monitoring tools have been implemented, enabling enterprises to have access to real customers’ opinions, complaints and questions at real time in a highly scalable manner. Characteristic examples include the SM2 tool of Alterian, Brandwatch, Converseon, Cymfony Maestro, My BuzzMetrics, Radian6, Sysomos and others. Even though very interesting and somehow effectively performing on open social media (twitter, blogs, microblogs etc), most aforementioned tools have very limited performance on rule-stringent media (where tough access policies are imposed). Furthermore usually extensive human guidance is needed and raw-tag manipulations are necessary. In order to bypass these problems, in this paper we propose an intelligent wrapper system that automatically segments closed social media web pages into structural tokens, extracts and associates opinions to each token. A key step towards retrieving the data of interest is to discover the sections contained

关键词： Reputation monitoring Social media Wrapper technologies Facebook

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