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Journal of Advances in Applied & Computational Mathematics最新文献

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On the G'/G Expansion Method Applied to (2+1)-Dimensional Asymmetric-Nizhnik-Novikov-Veselov Equation (2+1)维非对称nizhnik - novikov - veselov方程的G′/G展开法
Journal of Advances in Applied & Computational Mathematics Pub Date : 2023-09-07 DOI: 10.15377/2409-5761.2023.10.4
S. Mabrouk, A. S. Rashed
{"title":"On the G'/G Expansion Method Applied to (2+1)-Dimensional Asymmetric-Nizhnik-Novikov-Veselov Equation","authors":"S. Mabrouk, A. S. Rashed","doi":"10.15377/2409-5761.2023.10.4","DOIUrl":"https://doi.org/10.15377/2409-5761.2023.10.4","url":null,"abstract":"In this paper, the  G'/G expansion method is applied to the (2+1)-dimensional Asymmetric-Nizhnik-Novikov-Veselov equation (ANNV). The motivation is creating new families of solitary waves. The system of equations has been combined in one partial differential equation (PDE) and the traveling wave variable has been applied to transform the resultant equation into an ordinary differential equation (ODE). The homogenous balance condition has been applied to determine the truncation variable of the G'/G expansion. Four cases are created according to the appropriate choice of the arbitrary constants relations. For each case, some new solitary wave solutions including solitons and kinks represented by trigonometric, hyperbolic, logarithmic, polynomial, and combinations of these functions.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied & Computational Mathematics","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125930308","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: 0
A Conformable Inverse Problem with Constant Delay 一类具有常时滞的适形逆问题
Journal of Advances in Applied & Computational Mathematics Pub Date : 2023-08-16 DOI: 10.15377/2409-5761.2023.10.3
Auwalu Sa'idu, H. Koyunbakan
{"title":"A Conformable Inverse Problem with Constant Delay","authors":"Auwalu Sa'idu, H. Koyunbakan","doi":"10.15377/2409-5761.2023.10.3","DOIUrl":"https://doi.org/10.15377/2409-5761.2023.10.3","url":null,"abstract":"This paper aims to express the solution of an inverse Sturm-Liouville problem with constant delay using a conformable derivative operator under mixed boundary conditions. For the problem, we stated and proved the specification of the spectrum. The asymptotics of the eigenvalues of the problem was obtained and the solutions were extended to the Regge-type boundary value problem. As such, a new result, as an extension of the classical Sturm-Liouville problem to the fractional phenomenon, has been achieved. The uniqueness theorem for the solution of the inverse problem is proved in different cases within the interval (0,π). The results in the classical case of this problem can be obtained at α=1.\u00002000 Mathematics Subject Classification. 34L20,34B24,34L30.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied & Computational Mathematics","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124074372","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: 0
The Electromagnetic Scattering Problem by a Cylindrical Doubly-Connected Domain at Oblique Incidence: An Inverse Problem 斜入射圆柱形双连通区域的电磁散射问题:一个反问题
Journal of Advances in Applied & Computational Mathematics Pub Date : 2023-08-07 DOI: 10.15377/2409-5761.2023.10.2
Leonidas Mindrinos
{"title":"The Electromagnetic Scattering Problem by a Cylindrical Doubly-Connected Domain at Oblique Incidence: An Inverse Problem","authors":"Leonidas Mindrinos","doi":"10.15377/2409-5761.2023.10.2","DOIUrl":"https://doi.org/10.15377/2409-5761.2023.10.2","url":null,"abstract":"In this work, we examine the inverse problem to reconstruct the inner boundary of a cylindrical doubly-connected infinitely long medium from measurements of the scattered electromagnetic wave in the far-field. We consider the integral representation of the solution to derive a non-linear system of equations for the unknown radial function. We propose an iterative scheme using linearization and regularization techniques.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied & Computational Mathematics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133598018","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: 0
Numerical Investigation on Flow-Field Characteristics towards Removal of Free-Water by A Separator with Coalescing Plates 聚结板分离器去除自由水的流场特性数值研究
Journal of Advances in Applied & Computational Mathematics Pub Date : 2023-05-10 DOI: 10.15377/2409-5761.2023.10.1
Xiangdong Qi, Hongqi Zhang, Xitong Sun, Zhihua Wang
{"title":"Numerical Investigation on Flow-Field Characteristics towards Removal of Free-Water by A Separator with Coalescing Plates","authors":"Xiangdong Qi, Hongqi Zhang, Xitong Sun, Zhihua Wang","doi":"10.15377/2409-5761.2023.10.1","DOIUrl":"https://doi.org/10.15377/2409-5761.2023.10.1","url":null,"abstract":"The produced water-containing polymer brings new challenges to oil-water separation in oilfield production, yet separators with coalescing plates to remove free water have been playing an active role. In this paper, the flow-field characteristics of polymer-laden produced water in a separator with coalescing plates are analyzed using computerized mathematical methods to investigate the effects with a water content of 55%, 70%, and 85%, flow rate of 3500 m3/d, 4800 m3/d, and 6000 m3/d, and duration time of 20 min, 40 min, and 60 min on flow-field properties and separating efficiency are studied. The results show that the separating efficiency is positively correlated with water content and duration time, and duration time has the greatest improvement to the separating efficiency, but the enhancement of flow rate may reduce the separating efficiency. It is also observed that the separation efficiency of free-water reached 70.9% and the water content at the oil outlet of the separator reached 20.4% at a duration time of 60 min, when the contained polymer concentration and water content in the oil-water mixture are 500 mg/L and 70%, respectively.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied & Computational Mathematics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129064028","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: 0
The Unique Solution to the Differential Equations of the Fourth Order with Non-Homogeneous Boundary Conditions 具有非齐次边界条件的四阶微分方程的唯一解
Journal of Advances in Applied & Computational Mathematics Pub Date : 2022-12-30 DOI: 10.15377/2409-5761.2022.09.15
Madhubabu B, N. Sreedhar, K. R. Prasad
{"title":"The Unique Solution to the Differential Equations of the Fourth Order with Non-Homogeneous Boundary Conditions","authors":"Madhubabu B, N. Sreedhar, K. R. Prasad","doi":"10.15377/2409-5761.2022.09.15","DOIUrl":"https://doi.org/10.15377/2409-5761.2022.09.15","url":null,"abstract":"This research paper aims to establish the uniqueness of the solution to fourth-order nonlinear differential equations\u0000v(4)(x) + f (x,v(x)) = 0, x ε [a,b],\u0000with non-homogeneous boundary conditions\u0000where 0 ≤ a < ζ < b, the constants α, ???? are real numbers and f : [a,b] x R →R  is a continuous function with f (x, 0] ≠ 0. Using the sharper bounds on the integral of the kernel, the uniqueness of the solution to the problem is established based on Banach and Rus fixed point theorems on metric spaces.\u0000AMS Subject Classification: 34B15, 34B10.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied &amp; Computational Mathematics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125352383","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: 0
Recursive Estimation in the Moving Window: Efficient Detection of the Distortions in the Grids with Desired Accuracy 移动窗口中的递归估计:有效检测网格中的畸变并达到所需的精度
Journal of Advances in Applied &amp; Computational Mathematics Pub Date : 2022-12-28 DOI: 10.15377/2409-5761.2022.09.14
A. Stotsky
{"title":"Recursive Estimation in the Moving Window: Efficient Detection of the Distortions in the Grids with Desired Accuracy","authors":"A. Stotsky","doi":"10.15377/2409-5761.2022.09.14","DOIUrl":"https://doi.org/10.15377/2409-5761.2022.09.14","url":null,"abstract":"The development of fast convergent and computationally efficient algorithms for monitoring waveform distortions and harmonic emissions will be an important problem in future electrical networks due to the high penetration level of renewable energy systems, smart loads, new types of power electronics, and many others. Estimating the signal quantities in the moving window is the most accurate way of monitoring these distortions. Such estimation is usually associated with significant computational loads, which can be reduced by utilizing the recursion and information matrix properties. Rank two update representation of the information matrix allows the derivation of a new computationally efficient recursive form of the inverse of this matrix and recursive parameter update law. Newton-Schulz and Richardson correction algorithms are introduced in this paper to prevent error propagation and for accuracy maintenance. Extensive comparative analysis is performed on real data for proposed recursive algorithms and the Richardson algorithm with an optimally chosen preconditioner. Recursive algorithms show the best results in estimation with ill-conditioned information matrices.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied &amp; Computational Mathematics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131378804","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: 1
A Revised Comparison between Fama and French Five-Factor Model and Three-Factor Model——Based on China's A-Share Market 法玛与法国五因素模型与三因素模型的修正比较——基于中国A股市场
Journal of Advances in Applied &amp; Computational Mathematics Pub Date : 2022-12-07 DOI: 10.15377/2409-5761.2022.09.13
Zhijing Zhang, Yue Yu, Qinghua Ma, H. Yao
{"title":"A Revised Comparison between Fama and French Five-Factor Model and Three-Factor Model——Based on China's A-Share Market","authors":"Zhijing Zhang, Yue Yu, Qinghua Ma, H. Yao","doi":"10.15377/2409-5761.2022.09.13","DOIUrl":"https://doi.org/10.15377/2409-5761.2022.09.13","url":null,"abstract":"In allusion to some contradicting results in existing research, this paper selects China's latest stock data from 2005 to 2020 for empirical analysis. In this paper, the redundant factors (HML, CMA) are orthogonalized, and the regression analysis of the 5*5 portfolio of Size-B/M and Size-Inv is carried out with these two orthogonalized factors. It found that the HML and the CMA are still significant in many portfolios, indicating that they have a strong explanatory ability, which is also consistent with the results of GRS test. All these show that the five-factor model has a better ability to explain the excess return rate. Then, we analyze the possible reasons for the strong explanatory ability of the HML, CMA, and RMW from the aspects of price-to-book ratio, turnover rate, and correlation coefficient. We also explain the results and analyze China's stock market policy changes and investors' investment style in recent years.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied &amp; Computational Mathematics","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133310648","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: 0
Lateral Free Vibration of Micro-Rods Using a Nonlocal Continuum Approach 基于非局部连续体方法的微杆横向自由振动
Journal of Advances in Applied &amp; Computational Mathematics Pub Date : 2022-10-24 DOI: 10.15377/2409-5761.2022.09.12
F. Xie, Ning Zhang, Cheng Chen, Cheng Li
{"title":"Lateral Free Vibration of Micro-Rods Using a Nonlocal Continuum Approach","authors":"F. Xie, Ning Zhang, Cheng Chen, Cheng Li","doi":"10.15377/2409-5761.2022.09.12","DOIUrl":"https://doi.org/10.15377/2409-5761.2022.09.12","url":null,"abstract":"The lateral free vibration of micro-rods initially subjected to axial loads based on a nonlocal continuum theory is considered. The effects of nonlocal long-range interaction fields on the natural frequencies and vibration modes are examined. A simply supported micro-rod is taken as an example; the linear vibration responses are observed by two different methods, including the separation of variables and multiple scales analysis. The relations between the vibration mode and dimensionless coordinate and the relations between natural frequencies and nonlocal parameters are analyzed and discussed in detail. The numerical comparison shows that the theoretical results by two different approaches have a good agreement, which validates the present micro-rod model that can be used as a component of the micro-electromechanical system.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied &amp; Computational Mathematics","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114847879","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: 0
Optimization of Tuned Mass Damper for Submerged Floating Tunnel with Frequency-Domain Dynamics Simulation 水下浮式隧道调谐质量阻尼器的频域动力学仿真优化
Journal of Advances in Applied &amp; Computational Mathematics Pub Date : 2022-10-20 DOI: 10.15377/2409-5761.2022.09.11
Chungkuk Jin, Sung-Jae Kim, MooHyun Kim
{"title":"Optimization of Tuned Mass Damper for Submerged Floating Tunnel with Frequency-Domain Dynamics Simulation","authors":"Chungkuk Jin, Sung-Jae Kim, MooHyun Kim","doi":"10.15377/2409-5761.2022.09.11","DOIUrl":"https://doi.org/10.15377/2409-5761.2022.09.11","url":null,"abstract":"In this study, the Tuned Mass Damper (TMD) optimization is carried out to reduce the resonant motion of Submerged Floating Tunnel (SFT) under wave excitations. The SFT dynamics is evaluated in frequency domain; a new approach to cost-effectively optimizing TMD parameters for a moored system is suggested. Discrete-Module-Beam (DMB) method is used to model the Tunnel; mooring lines are included as equivalent stiffness matrix through static-offset tests by the fully coupled model. Since the frequency-domain dynamics simulation model is employed, a significant reduction in optimization time can be achieved. TMD is installed at the tunnel’s mid-length to mitigate the lateral motion of the Tunnel and coupled with the Tunnel with translational and rotational springs and dampers. The optimization process for TMD parameters is performed through the Genetic Algorithm (GA). The GA generates the TMD mass and spring and damping coefficients. The dynamics simulation is performed under wave conditions and this process is repeated until the stopping criteria is satisfied. Results demonstrate that TMD with optimized parameters significantly reduces the lateral motion, especially near the system’s lowest lateral natural frequency. This frequency-domain optimization also works as intended with significantly decreased optimization time.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied &amp; Computational Mathematics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123831797","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: 0
An Adversarial Approach to Adaptive Model Predictive Control 自适应模型预测控制的对抗方法
Journal of Advances in Applied &amp; Computational Mathematics Pub Date : 2022-09-19 DOI: 10.15377/2409-5761.2022.09.10
Paweł Wachel, C. Rojas
{"title":"An Adversarial Approach to Adaptive Model Predictive Control","authors":"Paweł Wachel, C. Rojas","doi":"10.15377/2409-5761.2022.09.10","DOIUrl":"https://doi.org/10.15377/2409-5761.2022.09.10","url":null,"abstract":"This paper presents a novel approach to introducing adaptation in Model Predictive Control (MPC). Assuming limited a priori knowledge about the process, we consider a finite set of possible models (a dictionary), and use the theory of adversarial multi-armed bandits to develop an adaptive version of MPC called adversarial adaptive MPC (AAMPC). Under weak assumptions on the dictionary components, we then establish theoretical bounds on the performance of AAMPC and show its empirical behaviour via simulation examples.","PeriodicalId":335387,"journal":{"name":"Journal of Advances in Applied &amp; Computational Mathematics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123996952","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: 0
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