Purpose This paper aims to propose an improved version of portfolio optimization model through the prediction of the future behavior of stock returns using a combined wavelet-based long short-term memory (LSTM). Design/methodology/approach First, data are gathered and divided into two parts,...

Purpose: This study aims to investigate the interactive network of risk factors in the construction and preparation project of gas condensate storage tanks in the presence of sanctions. Design/methodology/approach: First, this paper determines and weighs the project goals using the stepwise...

Purpose The purpose of this paper is to determine the criteria weights of outsourcing and their key role in ranking outsourcing suppliers. Design/methodology/approach A new hybrid multi-criteria decision-making approach merges three tools, namely, decision making trial and evaluation (DEMATLE),...