List of Articles Nonlinear optimization Open Access Article Abstract Page Full-Text 1 - Applying of Zhang neural network in time-varying nonlinear function optimization elaahe Karami zeinab Mousavi Kobra Gholami Open Access Article Abstract Page Full-Text 2 - Threshold F-policy and N-policy for multi-component machining system with warm standbys Kamlesh Kumar Madhu Jain Open Access Article Abstract Page Full-Text 3 - A multiple objective approach for joint ordering and pricing planning problem with stochastic lead times Zeinab Hosseini Reza Ghasemy Yaghin Maryam Esmaeili