Spherical fuzzy set (SFS) is also one of the fundamental concepts for address more uncertainties in decision problems than existing structures sets, and thus its implementation was substantial. The well-known sine trigonometric function maintains periodicity symmetry origin nature satisfies expectations experts over multi parameters. Taking this feature significance SFSs into consideration, mai...

insurance companies are important economic institutions in each country and support other economic institutions and good performance of them has an effective role in economic boom. insurance companies to achieve strong and effective performance must be aware of the environment, the competitor and their performance and carry out necessary actions with regard to this information. in this study, t...

the expansion of major cities regardless of the scientific planning principles has led to theemergence of negative urban development impacts in iran such as the degradation of natural resources andvarious forms of pollution. undoubtedly, urban rivers can enhance the ecological value of the earth to anoptimal extent. however, to benefit from these potentials, appropriate planning looks inevitabl...

Interval-valued Pythagorean fuzzy so set (IVPFSS) is a generalization of the interval-valued intuitionistic (IVIFSS) and (IVPFS). The IVPFSS handled more uncertainty comparative to IVIFSS; it most signicant technique for explaining information in decision-making process. In this work, some novel operational laws have been proposed. Based on presented laws, two innovative aggregation operators (...