DEA methodology allows DMUs to select the weights freely, so in the optimalsolution we may see many zeros in the optimal weight. to overcome this prob-lem, there are some methods, but they are not suitable for evaluating DMUswith fuzzy data. In this paper, we propose a new method for solving fuzzyDEA models with restricted multipliers with less computation, and comparethis method with Liu''''''...

In this paper, an impulsive boundary value problem on the half-line is considered and existence of solutions is proved using Minimization Principal and Mountain Pass Theorem.

The present paper is devoted to the development of a kind of spectral meshless radial point interpolation (SMRPI) technique in order to obtain a reliable approximate solution for buckling of nano-actuators subject to different nonlinear forces. To end this aim, a general type of the governing equation for nano-actuators, containing integro-differential terms and nonlinear forces is considered. ...

We study a second order differential equation with nonlinear multi-point boundary conditions. The existence and multiplicity of positive solutions is proved through Krasnoselskii fixed point theorem and Avery-Peterson theorem.

This paper investigates the existence of positive solutions for a sixth-order m-point boundary value problem with three variable parameters. Many problems in the theory of elastic stability can be handled by the method of multi-point problems. By using the fixed point theorem and operator spectral theorem, we give a new existence result.

We study the second-order m-point boundary value problem u′′(t) + a(t) f (t,u(t)) = 0, 0 < t < 1, u(0) = u(1) = ∑m−2 i=1 αiu(ηi), where 0 < η1 < η2 < ··· < ηm−2 ≤ 1/2, αi > 0 for i= 1,2, . . . ,m− 2 withm−2 i=1 αi < 1,m≥ 3. a : (0,1)→ [0,∞) is continuous, symmetric on the interval (0,1), and maybe singular at t = 0 and t = 1, f : [0,1]× [0,∞)→ [0,∞) is continuous, and f (·,x) is symmetric on th...

We study an m-point boundary-value problem on time scales. By using a fixed point theorem, we prove the existence of at least three positive solutions, under suitable growth conditions imposed on the nonlinear term. An example is given to illustrate our results.