Resource allocation has always been one of the main challenges in the design of wireless cellular networks. Suitable resource allocation, more specifically that includes suitable base station selection and bandwidth allocation can play an effective role in interference More
Resource allocation has always been one of the main challenges in the design of wireless cellular networks. Suitable resource allocation, more specifically that includes suitable base station selection and bandwidth allocation can play an effective role in interference mitigation and users’ quality of service requirement satisfaction. In this paper, a game theoretic approach is proposed to solve the BS selection problem in two-tier wireless femtocell networks. We formulate the competitive behavior of users as evolutionary game theory. We calculate the probability of a user choosing a BS, compute the cell load of each BS, and analyze the demand rejection probability of the user associated with the BS. The proposed approach maximizes network throughput as well as meeting the QoS requirements of the users. Finally, we propose a decentralized learning algorithm based on EXP3 algorithm to achieve the evolutionary equilibrium as the solution of the game. Simulation results show that the proposed approach achieves a desirable performance and guarantees users’ QoS requirements.
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SVM is one of the popular classification algorithms based on statistics learning, which is presented for two-class problems. In real environments, the problem is usually multi-class. Thus, multi-class separation methods are very important compared to binary classes. In More
SVM is one of the popular classification algorithms based on statistics learning, which is presented for two-class problems. In real environments, the problem is usually multi-class. Thus, multi-class separation methods are very important compared to binary classes. In this work, to decrease the complexity of the model and the resulting loss of accuracy, fuzzy game theory is derived, which will be able to map the non-linear to a linear problem. Fuzzy game theory is obtained from the probability of data in each class by using two players (in our problem, each player is equivalent to a class label). Here, the decision matrix is yielded by the fuzzy logic, and then the equations are solved by the linear programming. Obtained results from the computer simulation validate the SVM model by fuzzy game theory.
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When it comes to solving dynamic programming challenges, it is essential to have a well-structured decision theory. As a result, the decision-makers must operate in a dynamically complicated environment where appropriate and rapid reaction in a cooperat More
When it comes to solving dynamic programming challenges, it is essential to have a well-structured decision theory. As a result, the decision-makers must operate in a dynamically complicated environment where appropriate and rapid reaction in a cooperative way is the fundamental key to effectively completing the task. We express a theory of decision modeling and axiomatizing a decision-making process. The payoffs and probabilities are represented with simplified neutrosophic sets. We therefore, provide the theory of choice with the implementation of simplified neutrosophic sets. By exploiting the idea of pure strategy, we introduce two steps: in the first step, for each attractive point, some particular event is selected that can bring about a relatively neutrosophic upper payoff with a relatively neutrosophic upper probability or a relatively neutrosophic lower payoff with a relatively neutrosophic upper probability. A decision-maker selects the most favored attractive point in the second stage, based on the focus on all attractive points. Neutrosophic focus theory has been introduced to improve overall performance with more flexibility in complex decision-making. The approach suggested in this work has been implemented in a real-life example to determine its effectiveness. The proposed method is shown to be the most useful for ranking scenarios and addressing dynamic programming problems in decision-making.
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Recently, organizations have tended to focus on team activities, and cognitive factors such as social capital can affect the performance of individuals in this framework. In this regard, the present study examined the effect of social capital on individual decisions wit More
Recently, organizations have tended to focus on team activities, and cognitive factors such as social capital can affect the performance of individuals in this framework. In this regard, the present study examined the effect of social capital on individual decisions within the framework of teamwork. In order to achieve this goal, we came to the experimental environment and performed an examination of the effects by performing sequential and simultaneous games that were complete, static and dynamic, and perfect and imperfect. 182 students were selected from the population of students from universities of Yazd, and 2184 observations were collected. The results of the study showed that the increase in social capital of a team's players leads to increased team production, team revenue and team profits. The results also showed that people with high level of social capital are not affected by rewards, while reward changes lead to a change in the behavior of individuals with a moderate or lower social capital level.
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One of the most important issues in the field of natural gas export via pipeline is the lack of pricing strategy, and providing an optimum pricing mechanism has always been one of the biggest challenges for gas export contracts. In this paper a pricing mechanism based o More
One of the most important issues in the field of natural gas export via pipeline is the lack of pricing strategy, and providing an optimum pricing mechanism has always been one of the biggest challenges for gas export contracts. In this paper a pricing mechanism based on Game theory provided. The pricing mechanism has been developed based on cooperation among producing countries, consumers and gas transmitters that in the case of gas-exporting countries' commitment to it, the interests of these countries will be supplied. So, taking into account the realities of the market and according to the conditions of transmitter country, different scenarios have been compiled and according to it, the modeling is accomplished. The results of the different models in determining price, quantity and optimum tariff for two cooperative and non-cooperative games is that the interest of member countries in cooperative game is far greater than non-cooperative game.
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In this paper, a three-level scenario-based framework for determining the optimal strategy and planning of microgrids located in a 118-bus distribution system is presented. This paper considers the uncertai­nties of renewable energy resources, load demand, and the c More
In this paper, a three-level scenario-based framework for determining the optimal strategy and planning of microgrids located in a 118-bus distribution system is presented. This paper considers the uncertai­nties of renewable energy resources, load demand, and the charge / discharge schedule of electric vehicles. In order to increase planning flexibility, the operator will be able to change the flow through the distribution feeder reconfiguration. Also in the proposed model, customers will be able to reduce their costs by participating in a demand response program. In the first level of the proposed model, the bidding strategy of microgrids is determined. In the second level, the market clearing price is determined by the independent system operator and according to the submitted bids. Finally, in the third stage, the problem of final microgrid programming is solved by a participatory game theory method. The proposed model is solved by the CPLEX solver in GAMS software and the results show that the dynamic topology improves the planning flexibility and thus reduces the total operating cost by about 10%. The results also show that the coordination of electric vehicles with scheduling, the presence of storage systems and the implementation of the demand response program leads to a significant reduction in the level of market-clearing price and thus reduce operating costs.
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هدف از این تحقیق طراحی سناریوهای برگرفته از مدل بازی همکارانه مبتنی بر نظریه بازی برای بررسی پاداش و جریمه مشاهده شده از به اشتراک گذاشتن و یا عدم اشتراک دانش توسط شرکت ها است. جامعه آماری تحقیق شامل مدیران و خبرگان 10 شرکت زیرمجموعه شرکت ملی نفت ایران می باشد که از این More
هدف از این تحقیق طراحی سناریوهای برگرفته از مدل بازی همکارانه مبتنی بر نظریه بازی برای بررسی پاداش و جریمه مشاهده شده از به اشتراک گذاشتن و یا عدم اشتراک دانش توسط شرکت ها است. جامعه آماری تحقیق شامل مدیران و خبرگان 10 شرکت زیرمجموعه شرکت ملی نفت ایران می باشد که از این بین، تعداد 10 مدیر ارشد با روش گلوله برفی برای انجام مقایسات زوجی انتخاب شدند. روش تحقیق بر اساس طبقهبندی کومار،کاربردی، تفسیری، اکتشافی با ماهیت کمی و کیفی است. این مطالعه بر اهمیت به اشتراکگذاری کارآمد دانش به عنوان راهی برای ایجاد همکاری در سرمایه گذاران پورتفوهای شرکت ملی نفت ایران برای رقابت با رقبای خارجی در دوران تحریم تأکید میکند. با مرور نتایج چهار سناریوی حاصل از بازی، مشاهده گردید که پاداش مشاهده شده شرکتها از به اشتراک گذاشتن دانش، وابسته به رفتار ناشی از به اشتراک گذاری دانش توسط سایر شرکت ها می باشد. هر چه قابلیت های سازمان در مؤلفه های تأثیرگذار بر انتقال دانش و نوآوری بالاتر باشد، آنگاه شرکت ها در صورت همکاری، عایدی بیشتری کسب خواهند کرد. آنالیز حساسیت در مورد هزینه های همکاری پروژه ها که به واسطه دشواری اجرای پروژههای مشترک ایجاد می گردد نشان داد که با افزایش هزینه، شرکت ها از استراتژی همکاری به سمت استراتژی تلافی و سپس به سمت استراتژی عدم همکاری سوق پیدا می کنند. در مورد تأثیر وضعیت سرمایه فکری شرکت ها در انتخاب استراتژی همکاری مشاهده گردید شرکت هایی که تصمیم به همکاری دارند، اگر دارای سرمایه فکری بالاتر به واسطه تجربه و توانمندسازی باشند، آنگاه استراتژی بهینه به سمت همکاری تمایل پیدا می کند.
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Oligopoly is one of the common structures of the market and is actually a state between pure competition and pure monopoly. The theoretical literature distinguishes between the behaviors of companies in adopting competitive pricing strategies. It is common to study mode More
Oligopoly is one of the common structures of the market and is actually a state between pure competition and pure monopoly. The theoretical literature distinguishes between the behaviors of companies in adopting competitive pricing strategies. It is common to study models where all firms are price-makers or price-takers, but the simultaneous application of price-making and price-taking strategies by firms producing a similar product using game theory has not received much attention. Therefore, the purpose of this article is to use game theory with equilibrium concepts forward-looking equilibrium reasoning, and backward-looking individual learning simulation tools to investigate the behavior of companies. The results of the recent study showed that the Cournot-Nash model is a stable model for the real evaluation of pricing strategies in a dynamic oligopoly market. However, with a larger number of firms, a unilateral deviation from Cournot's behavior becomes profitable. In this paper, we have formally proved that the only possible stable market is the Cornot market, where every firm can be a price taker. Conversely, a market in which all firms accept only prices is never stable, and therefore Walrasian equilibrium is not applicable according to the findings. When there are no stable markets, the market does not evolve toward a fixed composition, but the number of price takers typically decreases. In such a situation, the market composition follows a cyclical pattern that is related to the stability or volatility of crude expectations.
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This article aims to describe and explain the strategic behavior of managers and shareholders in the interactive conflict environment of joint-stock firms using the tools of game theory, specifically through signaling games. Managers, considering the quality of internal More
This article aims to describe and explain the strategic behavior of managers and shareholders in the interactive conflict environment of joint-stock firms using the tools of game theory, specifically through signaling games. Managers, considering the quality of internal controls, engage in both deceptive and informative earnings management strategies. Shareholders then respond with strategies involving high or low capital costs and opt for either high or low-quality audit services. The findings of the research outline the theoretical conditions necessary for establishing balance in strategies such as deceptive earnings management with high capital costs and deceptive earnings management with high-quality audit services in environments characterized by weak internal controls. Additionally, it highlights the conditions required to establish equilibrium in strategies like informative earnings management with low capital costs and informative earnings management with low-quality audit services within environments boasting strong internal controls.
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Abstract The actors of the international system will always be aware of the future, as well as to determine their interactions and reactions, and to identify the future coordinates of the global system with the aim of maintaining their security and interests. By acknowl More
Abstract The actors of the international system will always be aware of the future, as well as to determine their interactions and reactions, and to identify the future coordinates of the global system with the aim of maintaining their security and interests. By acknowledging the international relations after the collapse of the Soviet Union, the world is practically ruled by a single-polar and despite the presence of China, Russia and the European Union in some global competition, still the hegemony of Washington almost exist. This article in response to the question of "The future of international order in the horizon of 2030?" has attempted to advance the global order based on the Games theory. Authors by using the " Scenario " method, argued that due to the constant effort of the States and a new actors such as India and Brazil to gain power in political, economic, cultural and military, global order will be changed. On the other hand, the USA's efforts to safeguard its hgemoni will cause the actor to maintain its focal focus, as a result of the current single-polar system to a single-multi-polarization system with the aforementioned focal classification and multi-focus (China, Russia, European Union, India and Brazil) will be changed.
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Classical data envelopment analysis models calculate the performance of decision-making units based on a common performance boundary and make no distinction between efficient units. In this study, the method of super-efficiency and cross-efficiency is used to rank the e More
Classical data envelopment analysis models calculate the performance of decision-making units based on a common performance boundary and make no distinction between efficient units. In this study, the method of super-efficiency and cross-efficiency is used to rank the efficient branches of banks before the cooperation phase. Then, in the cooperation phase, each efficient branch is considered as a player and the subdivisions of the efficient branches are considered as a coalition, and the problem is examined using the method of cooperative game theory and Shaply value. In this study, the efficiency change variable shows the impact of each efficient branch in different alliances. From the total variable of efficiency change of efficient branches in each coalition, a characteristic function called profit from the coalition is introduced. The value of this characteristic function is determined for all possible alliances and Shaply value is introduced as the solution of this cooperative game and the ranking of efficient branches is presented in terms of cooperation. The resulting model is implemented on a case study and the ranks of efficient branches are compared in the super efficiency method and cross-efficiency (before cooperation) and Shaply value method (after cooperation).
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