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International Journal of Applied Mathematics and Computer Sciences最新文献

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A biochemical multi-species quality model of a drinking water distribution system for simulation and design 饮用水分配系统的生化多物种质量模型的仿真与设计
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-09-01 DOI: 10.2478/amcs-2013-0043
K. Arminski, T. Zubowicz, M. Brdys
{"title":"A biochemical multi-species quality model of a drinking water distribution system for simulation and design","authors":"K. Arminski, T. Zubowicz, M. Brdys","doi":"10.2478/amcs-2013-0043","DOIUrl":"https://doi.org/10.2478/amcs-2013-0043","url":null,"abstract":"Abstract Drinking Water Distribution Systems (DWDSs) play a key role in sustainable development of modern society. They are classified as critical infrastructure systems. This imposes a large set of highly demanding requirements on the DWDS operation and requires dedicated algorithms for on-line monitoring and control to tackle related problems. Requirements on DWDS availability restrict the usability of the real plant in the design phase. Thus, a proper model is crucial. Within this paper a DWDS multi-species quality model for simulation and design is derived. The model is composed of multiple highly inter-connected modules which are introduced to represent chemical and biological species and (above all) their interactions. The chemical part includes the processes of chloramine decay with additional bromine catalysis and reaction with nitrogen compounds. The biological part consists of both heterotrophic and chemo-autotrophic bacteria species. The heterotrophic bacteria are assumed to consume assimilable organic carbon. Autotrophs are ammonia oxidizing bacteria and nitrite oxidizing bacteria species which are responsible for nitrification processes. Moreover, Disinfection By-Products (DBPs) are also considered. Two numerical examples illustrate the derived model’s behaviour in normal and disturbance operational states.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125246888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Epoch-incremental reinforcement learning algorithms Epoch-incremental强化学习算法
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-09-01 DOI: 10.2478/amcs-2013-0047
R. Zajdel
{"title":"Epoch-incremental reinforcement learning algorithms","authors":"R. Zajdel","doi":"10.2478/amcs-2013-0047","DOIUrl":"https://doi.org/10.2478/amcs-2013-0047","url":null,"abstract":"Abstract In this article, a new class of the epoch-incremental reinforcement learning algorithm is proposed. In the incremental mode, the fundamental TD(0) or TD(λ) algorithm is performed and an environment model is created. In the epoch mode, on the basis of the environment model, the distances of past-active states to the terminal state are computed. These distances and the reinforcement terminal state signal are used to improve the agent policy.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124852059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Parametric logarithmic type image processing for contrast based auto-focus in extreme lighting conditions 参数对数型图像处理在极端光照条件下基于对比度的自动对焦
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-09-01 DOI: 10.2478/amcs-2013-0048
C. Florea, L. Florea
{"title":"Parametric logarithmic type image processing for contrast based auto-focus in extreme lighting conditions","authors":"C. Florea, L. Florea","doi":"10.2478/amcs-2013-0048","DOIUrl":"https://doi.org/10.2478/amcs-2013-0048","url":null,"abstract":"Abstract While most of state-of-the-art image processing techniques were built under the so-called classical linear image processing, an alternative that presents superior behavior for specific applications comes in the form of Logarithmic Type Image Processing (LTIP). This refers to mathematical models constructed for the representation and processing of gray tones images. In this paper we describe a general mathematical framework that allows extensions of these models by various means while preserving their mathematical properties. We propose a parametric extension of LTIP models and discuss its similarities with the human visual system. The usability of the proposed extension model is verified for an application of contrast based auto-focus in extreme lighting conditions. The closing property of the named models facilitates superior behavior when compared with state-of-the-art methods.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132797777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Controlling a non-homogeneous Timoshenko beam with the aid of the torque 利用力矩控制非均匀Timoshenko梁
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-09-01 DOI: 10.2478/amcs-2013-0044
G. Sklyar, G. Szkibiel
{"title":"Controlling a non-homogeneous Timoshenko beam with the aid of the torque","authors":"G. Sklyar, G. Szkibiel","doi":"10.2478/amcs-2013-0044","DOIUrl":"https://doi.org/10.2478/amcs-2013-0044","url":null,"abstract":"Abstract Considered is the control and stabilizability of a slowly rotating non-homogeneous Timoshenko beam with the aid of a torque. It turns out that the beam is (approximately) controllable with the aid of the torque if and only if it is (approximately) controllable. However, the controllability problem appears to be a side-effect while studying the stabilizability. To build a stabilizing control one needs to go through the methods of correcting the operators with functionals so that they have finally the appropriate form and the results on C0-continuous semigroups may be applied.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130686329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Robust nonlinear observer design for actuator fault detection in diesel engines 柴油机作动器故障检测的鲁棒非线性观测器设计
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-09-01 DOI: 10.2478/amcs-2013-0042
B. Boulkroune, I. Djemili, A. Aitouche, V. Cocquempot
{"title":"Robust nonlinear observer design for actuator fault detection in diesel engines","authors":"B. Boulkroune, I. Djemili, A. Aitouche, V. Cocquempot","doi":"10.2478/amcs-2013-0042","DOIUrl":"https://doi.org/10.2478/amcs-2013-0042","url":null,"abstract":"Abstract This paper is concerned with actuator fault detection in nonlinear systems in the presence of disturbances. A nonlinear unknown input observer is designed and the output estimation error is used as a residual for fault detection. To deal with the problem of high Lipschitz constants, a modified mean-value theorem is used to express the nonlinear error dynamics as a convex combination of known matrices with time-varying coefficients. Moreover, the disturbance attenuation is performed using a modified H∞ criterion. A sufficient condition for the existence of an unknown input observer is obtained using a linear matrix inequality formula, and the observer gains are obtained by solving the corresponding set of inequalities. The advantages of the proposed method are that no a priori assumption on the unknown input is required and that it can be applied to a large class of nonlinear systems. Performances of the proposed approach are shown through the application to a diesel engine model.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132826358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Generalized reasoning about faults based on the diagnostic matrix 基于诊断矩阵的故障广义推理
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-06-01 DOI: 10.2478/amcs-2013-0031
Michal Bartys
{"title":"Generalized reasoning about faults based on the diagnostic matrix","authors":"Michal Bartys","doi":"10.2478/amcs-2013-0031","DOIUrl":"https://doi.org/10.2478/amcs-2013-0031","url":null,"abstract":"This paper introduces a set of comprehensive general reasoning rules about single faults based on a diagnostic matrix. The reasoning scheme unifies inference about faults based on a conventional binary diagnostic matrix, a two- and three-valued fault isolation system as well as on their fuzzy counterparts. There are introduced and defined notions of alternative and dominant fault signatures, fuzzy fault signatures as well as a matrix of alternative signatures. This matrix is supposed to be used instead of the classic diagnostic one. It is also shown that dominant fault signatures are transformable into alternative ones. Finally, three variants of concise general reasoning rules of faults are given. Three examples illustrate key point issues of the paper. The first example refers to a medical diagnostic case. It shows an instance of dominant fault signatures and, in fact, proposes a rational approach for planning diagnostic tests. The other examples describe the fuzzy reasoning approach employing a matrix of fuzzy alternative signatures applicable for use with multi-valued fuzzy diagnostic signals. Future works are outlined in the summary section.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121685608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Bifurcation and control for a discrete-time prey–predator model with Holling-IV functional response 具有Holling-IV函数响应的离散捕食-捕食模型的分岔与控制
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-06-01 DOI: 10.2478/amcs-2013-0019
Qiaoling Chen, Z. Teng, Zengyun Hu
{"title":"Bifurcation and control for a discrete-time prey–predator model with Holling-IV functional response","authors":"Qiaoling Chen, Z. Teng, Zengyun Hu","doi":"10.2478/amcs-2013-0019","DOIUrl":"https://doi.org/10.2478/amcs-2013-0019","url":null,"abstract":"The dynamics of a discrete-time predator-prey model with Holling-IV functional response are investigated. It is shown that the model undergoes a flip bifurcation, a Hopf bifurcation and a saddle-node bifurcation by using the center manifold theorem and bifurcation theory. Numerical simulations not only exhibit our results with the theoretical analysis, but also show the complex dynamical behaviors, such as the period-3, 6, 9, 12, 20, 63, 70, 112 orbits, a cascade of period-doubling bifurcations in period-2, 4, 8, 16, quasi-periodic orbits, an attracting invariant circle, an inverse period-doubling bifurcation from the period-32 orbit leading to chaos and a boundary crisis, a sudden onset of chaos and a sudden disappearance of the chaotic dynamics, attracting chaotic sets and non-attracting sets. We also observe that when the prey is in chaotic dynamics the predator can tend to extinction or to a stable equilibrium. Specifically, we stabilize the chaotic orbits at an unstable fixed point by using OGY chaotic control.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"244 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131966071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 33
Convergence analysis of piecewise continuous collocation methods for higher index integral algebraic equations of the Hessenberg type 高指标Hessenberg型积分代数方程分段连续配置方法的收敛性分析
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-06-01 DOI: 10.2478/amcs-2013-0026
B. Shiri, S. Shahmorad, G. Hojjati
{"title":"Convergence analysis of piecewise continuous collocation methods for higher index integral algebraic equations of the Hessenberg type","authors":"B. Shiri, S. Shahmorad, G. Hojjati","doi":"10.2478/amcs-2013-0026","DOIUrl":"https://doi.org/10.2478/amcs-2013-0026","url":null,"abstract":"In this paper, we deal with a system of integral algebraic equations of the Hessenberg type. Using a new index definition, the existence and uniqueness of a solution to this system are studied. The well-known piecewise continuous collocation methods are used to solve this system numerically, and the convergence properties of the perturbed piecewise continuous collocation methods are investigated to obtain the order of convergence for the given numerical methods. Finally, some numerical experiments are provided to support the theoretical results.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131024087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Random projections and Hotelling’s T2 statistics for change detection in high-dimensional data streams 用于高维数据流变化检测的随机预测和Hotelling的T2统计
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-06-01 DOI: 10.2478/amcs-2013-0034
E. Skubalska-Rafajlowicz
{"title":"Random projections and Hotelling’s T2 statistics for change detection in high-dimensional data streams","authors":"E. Skubalska-Rafajlowicz","doi":"10.2478/amcs-2013-0034","DOIUrl":"https://doi.org/10.2478/amcs-2013-0034","url":null,"abstract":"The method of change (or anomaly) detection in high-dimensional discrete-time processes using a multivariate Hotelling chart is presented. We use normal random projections as a method of dimensionality reduction. We indicate diagnostic properties of the Hotelling control chart applied to data projected onto a random subspace of Rn. We examine the random projection method using artificial noisy image sequences as examples.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123006091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
An analytical and numerical approach to a bilateral contact problem with nonmonotone friction 具有非单调摩擦的双边接触问题的解析和数值方法
International Journal of Applied Mathematics and Computer Sciences Pub Date : 2013-06-01 DOI: 10.2478/amcs-2013-0020
M. Barboteu, K. Bartosz, Piotr Kalita
{"title":"An analytical and numerical approach to a bilateral contact problem with nonmonotone friction","authors":"M. Barboteu, K. Bartosz, Piotr Kalita","doi":"10.2478/amcs-2013-0020","DOIUrl":"https://doi.org/10.2478/amcs-2013-0020","url":null,"abstract":"We consider a mathematical model which describes the contact between a linearly elastic body and an obstacle, the so-called foundation. The process is static and the contact is bilateral, i.e., there is no loss of contact. The friction is modeled with a nonmotonone law. The purpose of this work is to provide an error estimate for the Galerkin method as well as to present and compare two numerical methods for solving the resulting nonsmooth and nonconvex frictional contact problem. The first approach is based on the nonconvex proximal bundle method, whereas the second one deals with the approximation of a nonconvex problem by a sequence of nonsmooth convex programming problems. Some numerical experiments are realized to compare the two numerical approaches.","PeriodicalId":253470,"journal":{"name":"International Journal of Applied Mathematics and Computer Sciences","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114156803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 41
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