https://publish.thescienceinsight.com/index.php/ijgs/issue/feed 2024-12-31T14:54:28+00:00 Iqra Javed manager@thescienceinsight.com Open Journal Systems <h2>Why to publish in IJGS?</h2> <p><em>International Journal of Grey Systems</em> is the first American journal devoted to grey system theory and its application. It is published bi-annually in English in both print and online versions. IJGS publishes novel research involving Grey System Theory and related concepts. It is devoted to the international advancement of the theory and application of grey systems and uncertainty analysis. It seeks to nurture professional communication between scientists and practitioners who are interested in the theory and application of Grey System Theory. IJGS is an open access double-blind peer-reviewed journal, published by the <a href="https://thescienceinsight.com/">Science Insight</a> (USA) bi-annually. </p> https://publish.thescienceinsight.com/index.php/ijgs/article/view/103 2024-12-06T13:36:15+00:00 Chunxia Feng fengchunxia@nuaa.edu.cn Sifeng Liu sfliu@nuaa.edu.cn Wenjie Dong dongwenjie@nuaa.edu.cn Liangyan Tao lytao@nuaa.edu.cn

<p>Due to the uncertainty of cognition and the difficulty of obtaining information, the reliability information of complex equipment is full of uncertainty. In order to make full use of multi-source uncertain reliability information, a reliability evaluation model based on D-S evidence theory and general uncertainty theory is proposed. The main work is as follows: Firstly, the basic probability assignment of evidence theory is carried out through general uncertainty theory for random, fuzzy, grey and rough reliability data in the development process of complex equipment. Second, in order to address the fusion of conflicting evidence, the weights of the evidences to be fused are corrected from three different perspectives. On this basis, the optimal weight combination is obtained by the TOPSIS method. The mission reliability evaluation result of the whole complex equipment is obtained by using the Dempster combination rule; Finally, an arithmetic example illustrates that the method proposed in this study is characterized by more conservative assessment results and more accurate reflection of changes in reliability confidence.</p> <p> </p>

2024-12-30T00:00:00+00:00 Copyright (c) 2024 Science Insight https://publish.thescienceinsight.com/index.php/ijgs/article/view/101 2024-12-24T08:10:31+00:00 Mohamed Ouali mouhammedouali@gmail.com Beenish Ramzan beenishnawaz033@gmail.com Muhammad Wasif Hanif wasifcui@gmail.com Ghulam Abbas Bhatti abbas@bathspa.ae Muhammad Nawaz m_nawaz_progressive@yahoo.com

<p>Mobile cellular telephone subscriptions and secure internet servers play an important role in the digital infrastructure of the country, and their growth projections hold useful information for planners and policymakers. The current study makes a pioneering attempt to forecast the growth in mobile cellular subscriptions and secure internet servers in the United States of America and China using an intelligent and flexible time-series grey model called EGM (1,1, α, θ). Secure internet servers in the US and China are projected to grow exponentially, while mobile cellular subscriptions for both countries showed linear growth. The error analysis done through the mean absolute percentage error revealed some interesting results related to secure Internet servers. The results provide useful insights for proper planning of the digital infrastructure of the two digital powerhouses.</p> <p> </p>

2024-12-30T00:00:00+00:00 Copyright (c) 2024 Science Insight