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Sustainable information into portfolio optimization models 可持续信息纳入投资组合优化模型
Journal of AppliedMath Pub Date : 2023-08-28 DOI: 10.59400/jam.v1i1.125
Gabriele Sbaiz
{"title":"Sustainable information into portfolio optimization models","authors":"Gabriele Sbaiz","doi":"10.59400/jam.v1i1.125","DOIUrl":"https://doi.org/10.59400/jam.v1i1.125","url":null,"abstract":"In the last fifteen years, extreme events such as the global financial and economic crisis of 2007–2008 and the Covid-19 pandemic have highlighted the importance of corporate social responsibility and sustainability in different aspects of our society. The environmental, social, and governance (ESG) disclosures have also gained increasing significance for investors due to initiatives undertaken by international bodies. In particular, with the Action Plan in 2018, the European Commission has assigned specific responsibilities to financial intermediaries to drive flows toward sustainable investments, explicitly requiring portfolio managers to integrate these non-financial factors into their decision-making processes. More and more, asset management firms and insurance companies offer tailored products to meet their customers’ sustainable needs and desires. This trend implies a growing recognition of sustainable practices in the financial sector, emphasized by the need to integrate ESG considerations in investment strategies.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135134050","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
Towards a solution to the problem of safety management of structurally complex systems 探讨结构复杂系统的安全管理问题
Journal of AppliedMath Pub Date : 2023-08-28 DOI: 10.59400/jam.v1i1.68
Alexander V. Bochkov
{"title":"Towards a solution to the problem of safety management of structurally complex systems","authors":"Alexander V. Bochkov","doi":"10.59400/jam.v1i1.68","DOIUrl":"https://doi.org/10.59400/jam.v1i1.68","url":null,"abstract":"The non-isolation of modern, structurally complex, multi-purpose systems implies not only their interaction with the external environment, but also the impact of this environment on the systems themselves. The ability to predict and assess the consequences of these impacts, which are characterised by great uncertainty about the time, place and method of implementation, as well as the choice of a particular object of influence, is a task of extreme urgency in today’s globalised world. If the stability of functioning of any structurally complex system is understood as the achievement by it of the purpose of its functioning with acceptable deviations on the volumes and times of implementation of private tasks, the safety management in this system is reduced, in fact, to minimisation of unplanned losses at the occurrence of abnormal situations of various kinds and to carrying out of measures for their prevention. The success of such tactics depends largely on the effectiveness of the risk management system, on the ability of decision-makers to foresee the possibility of poorly formalised threats turning into significant risks, i.e., on having methods and tools for ranking threats and significant risk factors. Inevitably, there is the task of setting protection priorities, ranking objectives (usually of different types), problems and threats, and reallocating available (usually limited) resources. The article considers the issues involved in building an integral security model that takes into account the risks to the assets being protected.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135134049","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
Machine learning in coal and gas outburst prediction 煤与瓦斯突出预测中的机器学习
Journal of AppliedMath Pub Date : 2023-08-25 DOI: 10.59400/jam.v1i1.74
Peng Ji, Shiliang Shi
{"title":"Machine learning in coal and gas outburst prediction","authors":"Peng Ji, Shiliang Shi","doi":"10.59400/jam.v1i1.74","DOIUrl":"https://doi.org/10.59400/jam.v1i1.74","url":null,"abstract":"Artificial intelligence is flourishing, and its research achievements are being extensively applied across various industries. In the field of predicting coal and gas outbursts, methods such as machine learning and deep learning have been widely explored, resulting in accurate prediction accuracy and excellent predictive effects. This has significantly improved the safety of coal mine underground operations.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134930549","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
Statistical analysis of a Tagore song based on Raga Kafi 基于拉格卡菲的泰戈尔一首歌曲的统计分析
Journal of AppliedMath Pub Date : 2023-08-25 DOI: 10.59400/jam.v1i1.85
Soubhik Chakraborty, Prerna Singh
{"title":"Statistical analysis of a Tagore song based on Raga Kafi","authors":"Soubhik Chakraborty, Prerna Singh","doi":"10.59400/jam.v1i1.85","DOIUrl":"https://doi.org/10.59400/jam.v1i1.85","url":null,"abstract":"Rabindra Sangeet or Tagore songs encompass a wide variety of human emotions. Most of these songs are based on Hindustani ragas. Kafi is a joyful raga and therefore could be helpful to combat stress. We are motivated to analyse a popular Tagore song, namely, Momo Chitte, which is based on this raga. Statistical analysis compares two phases of 30 s each of a vocal recording of this song. Several statistical features are considered including note duration, inter onset interval, rate of change of pitch, statistical parameterization of melody and rhythm in addition to analysis of spectrogram and pitch profile. The experimental results are encouraging.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134930550","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
Gravitational redshift explained as a Doppler Effect in uniformly accelerated frames 引力红移解释为匀加速帧中的多普勒效应
Journal of AppliedMath Pub Date : 2023-08-18 DOI: 10.59400/jam.v1i2.156
A. Sfarti
{"title":"Gravitational redshift explained as a Doppler Effect in uniformly accelerated frames","authors":"A. Sfarti","doi":"10.59400/jam.v1i2.156","DOIUrl":"https://doi.org/10.59400/jam.v1i2.156","url":null,"abstract":"Einstein predicted a change in the energy of photons in the proximity of a gravitational field, the change being directly proportional with the distance from the gravitational source. In the early 60’s Pound and Rebka have set to verify Einstein’s prediction. The experiment was reprised with even higher precision by Pound and Snider. Later, Vessot reprised the experiment in space at a much improved precision. The standard explanation of gravitational redshift falls out straight from the Schwarzschild solution of the Einstein Field Equations (EFE). In the following, we will present an approach to the experiment relying on the Einstein Equivalence Principle and on the recently derived expressions of Doppler Effect for uniformly accelerated motion of the source and the receiver. We will conclude with a chapter on the numerical limits of applicability of the described method.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136214868","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
On a first order linear singular differential equation in the space K’ 关于空间K '中的一阶线性奇异微分方程
Journal of AppliedMath Pub Date : 2023-08-18 DOI: 10.59400/jam.v1i2.88
Abdourahman Haman Adji, Shankishvili Lamara Dmitrievna
{"title":"On a first order linear singular differential equation in the space K’","authors":"Abdourahman Haman Adji, Shankishvili Lamara Dmitrievna","doi":"10.59400/jam.v1i2.88","DOIUrl":"https://doi.org/10.59400/jam.v1i2.88","url":null,"abstract":"We propose in this work to describe all the generalized-function solutions of the non-homogeneous first-order linear singular differential equation with two real numbers, and , in the space of generalized functions K’. In the case of a second right-hand side consisting of an s-order derivative of the Dirac-delta function, we have completely investigated the considered equation when we look for the solution in the form of with the unknown coefficients which we have determined case by case, taking into account the relationship between the parameters inside. On the basis of what has been done, we focus our present research to apply the principle of superposition of the solutions that is conducting us to the awaited result when we also maintain the classical solutions of the homogeneous equation which remains the same.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136214866","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
On the existence of a positive solution to a boundary value problem for one nonlinear functional-differential equation of the second order 一类二阶非线性泛函微分方程边值问题正解的存在性
Journal of AppliedMath Pub Date : 2023-08-14 DOI: 10.59400/jam.v1i2.200
Gusen Abduragimov
{"title":"On the existence of a positive solution to a boundary value problem for one nonlinear functional-differential equation of the second order","authors":"Gusen Abduragimov","doi":"10.59400/jam.v1i2.200","DOIUrl":"https://doi.org/10.59400/jam.v1i2.200","url":null,"abstract":"This article considers a boundary value problem for one non-linear second-order functional differential equation on the segment [0, 1] with an integral boundary condition at one of the ends of the segment. Using the well-known Go-Krasnoselsky theorem, sufficient conditions for the existence of at least one positive solution of the problem under consideration are established. A non-trivial example is given, illustrating the fulfillment of the conditions for the unique solvability of the problem posed.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135307931","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
Mathematical analysis of epidemic model to assess the impact of lockdown on COVID-19 疫情模型的数学分析评估封锁对COVID-19的影响
Journal of AppliedMath Pub Date : 2023-08-12 DOI: 10.59400/jam.v1i2.97
Partha Karmakar, Krishna Pada Das, Satyajit Saha, Bhagabat Das, Rakesh Kumar
{"title":"Mathematical analysis of epidemic model to assess the impact of lockdown on COVID-19","authors":"Partha Karmakar, Krishna Pada Das, Satyajit Saha, Bhagabat Das, Rakesh Kumar","doi":"10.59400/jam.v1i2.97","DOIUrl":"https://doi.org/10.59400/jam.v1i2.97","url":null,"abstract":"Covid-19 and its variants, have been a worst pandemic, the entire world has witnessed. Tens of millions of cases have been recorded in over 210 countries and territories as part of the ongoing global pandemic that is still going on today. In this paper, we propose a SEI mathematical model to investigate the impact of lockdown to the controlling and spreading of infectious disease COVID-19. The epidemic model incorporates constant recruitment, experiencing infectious force in the latent period and the infected period. The equilibrium states are computed. Under some conditions, results for local asymptotic stability and global stability of disease-free and endemic equilibrium are established by using the stability theory of ordinary differential equations. It is seen that when the basic reproduction number , the dynamical system is stable and diseases die out from the system and when , the disease persists in the dynamical system. When , trans critical bifurcation is appeared. The numerical simulations are carried out to validate the analytical results.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135354503","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
Enhanced medicinal applications of Co-doped Zn0.5Ni0.5Fe2-xO4 for (X = 0.00 and 0.0250) soft ferrites: A structural analysis (X = 0.00和0.0250)软铁氧体共掺杂Zn0.5Ni0.5Fe2-xO4的结构分析
Journal of AppliedMath Pub Date : 2023-08-05 DOI: 10.59400/jam.v1i2.237
Abu Zar Muaawia, Ali Mujtaba, M. I. Khan, Babar Ali, Ansa Karamat, Adnan Asghar
{"title":"Enhanced medicinal applications of Co-doped Zn0.5Ni0.5Fe2-xO4 for (X = 0.00 and 0.0250) soft ferrites: A structural analysis","authors":"Abu Zar Muaawia, Ali Mujtaba, M. I. Khan, Babar Ali, Ansa Karamat, Adnan Asghar","doi":"10.59400/jam.v1i2.237","DOIUrl":"https://doi.org/10.59400/jam.v1i2.237","url":null,"abstract":"In this experimental research paper, we investigate the potential enhancement of Co-doped Zn0.5Ni0.5Fe2-xCoxO4 for (x = 0.0, and 0.0250) ferrites, synthesis by green synthesis method for applications in medicine. The structural analysis of the synthesized material is a crucial step in understanding its suitability for medical applications. X-ray Diffraction (XRD) is employed to elucidate the crystallographic structure of the Co-doped ZnNiFe2O4 ferrites. The results demonstrate that the doping process has a significant influence on the material’s crystal structure, which may impact its potential in various biomedical applications. The Co-doped ZnNiFe2O4 spinel ferrite materials become more suitable for medical applications as the decrease in X-ray density and simultaneous increase in bulk density can facilitate better tissue penetration and biocompatibility, making them ideal for non-invasive medical imaging and therapeutic applications, while minimizing potential health risks.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136083995","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
Impact analysis of correlated and non-normal errors in nonparametric regression estimation: A simulation study 非参数回归估计中相关误差和非正态误差的影响分析:模拟研究
Journal of AppliedMath Pub Date : 2023-07-27 DOI: 10.59400/jam.v1i2.109
Javaria Ahmad Khan, Atif Akbar, Nasir Saleem, Muhammad Junaid
{"title":"Impact analysis of correlated and non-normal errors in nonparametric regression estimation: A simulation study","authors":"Javaria Ahmad Khan, Atif Akbar, Nasir Saleem, Muhammad Junaid","doi":"10.59400/jam.v1i2.109","DOIUrl":"https://doi.org/10.59400/jam.v1i2.109","url":null,"abstract":"In nonparametric regression, the correlation of errors can have important consequences on the statistical properties of the estimators, but the focus is identification of the effect on Average Mean Squared Error (AMSE). This is performed by a Monte Carlo experiment where we use two types of correlation structures and examined with different correlation points/levels and different error distributions with different sample sizes. We concluded that if errors are correlated then distribution of error is important with correlation structures but correlation points/levels have a less significant effect, comparatively. When errors are uniformly distributed, then AMSE are smallest then any other distribution and if errors follow the Laplace distribution then AMSE are largest then other distributions also Laplace have some alarming effect. More keenly, kernel estimator is robust in case of simple correlation structure, and AMSEs attains their minimum when errors are uncorrelated.","PeriodicalId":495855,"journal":{"name":"Journal of AppliedMath","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135755536","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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