https://dspace.univ-ouargla.dz/jspui/handle/123456789/31289 2026-04-07T22:23:49Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/34033 Titre: Intelligence Artificielle et Economie Environnementale: Enquête Bibliométrique Auteur(s): Mohamed Lamine BENDAOUD Résumé: This research investigates the role of artificial intelligence (AI) in environmental economics studies. By analyzing 1642 articles, it is found that the number of publications in this field has significantly increased in recent years. The journal "Sustainability (Switzerland)" is identified as the most relevant source. Key research areas include sustainable development, machine learning, and decision-making with AI. The study highlights the potential of AI in environmental resource management. Overall, the findings emphasize the growing importance of AI in shaping the field of environmental economics and its potential for sustainable solutions. Description: Journal of Quantitative Economics Studies 2023-01-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/34030 Titre: Forecasting of CO2 Emissions in Algeria Using Discrete Wavelet Transform – Based Autoregressive Integrated Moving Average Models Auteur(s): Abdelkader SAHED; Mohammed MEKIDICHE; Hacene KAHOUI Résumé: The increasing impact of climate change and rising temperatures has made the reduction of carbon dioxide emissions a top priority globally. Accurately forecasting these emissions is a crucial aspect of transitioning towards a clean energy economy. This paper introduces a new method for estimating CO2 emissions by combining the wavelet technique with both an autoregressive integrated moving average (DWT-ARIMA) and ARIMA model, applied to annual carbon dioxide emissions data in Algeria from 1970 to 2022. The study provides decision makers with crucial information to help find effective environmental protection solutions in Algeria. The results suggest that the wavelet-ARIMA model is more effective compared to the traditional ARIMA model Description: Journal of Quantitative Economics Studies 2023-01-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/34025 Titre: Markov Chain-Based Reliability Models; A Comparative Study of Their Performance and Applicability in Complex Systems Auteur(s): Zoubir LAYOUNI Résumé: Markov processes are frequently used to model repairable and reconfigurable systems, but other systems are complicate due of redundancy or large number of states. If all components are repairable and non-aging, the initial state is the only slow state and exponential approximations for the system reliability are both accurate and relatively easy to calculate. On the other hand, if some components are subject to ageing, the system can still be modelled with a Markov process using the phase method. But a lot of states are then introduced and the abovementioned methods are no longer usable. This paper introduces a more tractable version of the well-known method that we called “cutting method”. This method is also valid if some repairs are delayed when repairs are initiated on the occurrence of a second failure. We propose two approaches to describe the system configuration: An global architecture, called network approach using the form of the parallel- series (or series-parallel) structure and heuristic approach based on decomposition to describe and compute measures. This new and computationally efficient heuristic model is developed for computing reliability and availability of the osmosis dialysis systems, these parameters will lead to an improvement in patient outcomes and overall quality of care. A numerical example is presented, and an implementation is developed Description: Journal of Quantitative Economics Studies 2023-01-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/34020 Titre: نموذج استراتيجي مقترح لتفسير خلق القيمة للمؤسسات الاقتصادية الجزائرية - (2016- - دراسة تطبيقية للمؤسسات العمومية لقطاع الاسمنت الجزائري للفترة ( 2011 Constructing a Measurement Stereotype to Add More Value to the Sement Industry in Algeria for the Period (2011-2016) Auteur(s): رمضان مريزيق Résumé: دف الدراسة إلى محاولة بناء نموذج مالي استراتيجي لخلق القيمة اعتمادا على مجموعة مستخلصة من المؤشرات الاقتصادية الكلية والمؤشرات القطاعية (قطاع صناعة الاسمنت الجزائري) والمؤشرات الجزئية (المؤسساتية) المستخرجة من القوائم المالية للمؤسسات عينة الدراسة، 2016 )، وباستخدام طريقة الانحدار - وهي بعض مؤشرات الربحية ومؤشرات السيولة ومؤشرات المديونية خلال الفترة الممتدة ( 2011 .Gretl و Eviews التدريجي الأمامي في المعالجة القياسية لهذه المعطيات واعتمادا على البرنامجين الإحصائيين 9 و بعلاقة ذات EVA خلصت نتائج الدراسة إلى بناء نموذج قياسي لخلق القيمة في قطاع الاسمنت الجزائري معبرا عنه بالقيمة الإقتصادية المضافة دلالة إحصائية بين المتغير التابع والمتغيرات المستقلة المستخلصة، حيث كانت المؤشرات الجزئية (نسبة قابلية التسديد، معدل الفائض الإجمالي للاستغلال، معدل العائد على الأصول، نسبة التداول الفورية) ذات تأثير طردي، بينما كانت المتغيرات الجزئية (معدل العائد على حقوق الملكية، نسبة الاستقلالية المالية) ذات تأثير عكسي، كما كان المؤشر قطاعي (معدل نمو إجمالي الناتج الداخلي الحقيقي لقطاع مواد البناء) ذو تأثير طردي ، وتأثير طردي لمؤشر (معدل النمو) وتأثير عكسي لمؤشر (سعر صرف الدينار مقابل الدولار الأمريكي) كمتغيرين إقتصاديين كليين، وكانت المؤشرات الجزئية أكثر تفسيرا لخلق القيمة The current study aims at constructing a strategical financial system based on macro economics and sectorial indicators (sement in Algeria) and other micro indicators extracted from the sample/case study. Most of extractions are profitability, liquidity index and debt indicators from 2011-2016. That we do utilizing gradual regression for evaluating the data, making use of Eviews 9 and Gretl. The study concluded by constructing a measurement stereotype to add more value to the sement industry, expressed as value added, with statistical relation between The dependent and the independent variables. The micro indicators seemed(Current repayment rate, gross operating surplus rate, rate of return on assets, cash to current liabilities ratio) to be of positive effect, there also appears(rate of return on equity , Financial independence ratio) to be an indicator of that effect, and The sectoral indicator (real GDP growth rate for the building materials sector) had a positive impact, and also an aoppositional one as total economical variables, but the micro indicators seemed more pertinent and a true indicator of value. Description: مجلة الدراسات الالاقتصادية الكمية 2023-01-01T00:00:00Z