Factor analyses of scales that contain items written in opposite directions sometimes show two factors, each of which contains items written in only one direction. Such item direction factors have been found in scales of afSect and personality that have been used in organizational research. We discuss how patterns of subject responses to items that vary in direction and extremity can produce an...

<p style='text-indent:20px;'>A newsboy problem is a typical stochastic inventory management and has extensive applications in the fields of operational research, sciences marketing sciences. One challenges underlying such problems to handle uncertainty demands. In existing results, it often assume that demand distribution given facilitate solution problems. this paper, novel data-driven r...

• A deep reinforcement learning algorithm is proposed for multi-item retrieval in the PBS system. compact integer programming model built to evaluate solution quality. conversion handle simultaneous movement. decomposition framework designed large-scale instances. The effect of several factors investigated deduce managerial insights. Nowadays, fast delivery services have created need high-densi...