Problems and countermeasures on main mineral resource sustainable supply in northeastern China

northeastern China is an important old industrial base in China. Mineral resources are the foundation of industry development. However, because of long-term exploitation of mineral resources in northeastern China, the mineral resources reserves decrease gradually and some mineral resources are nearly exhausted, which restricts revitalization and sustainable development of the northeast old industrial base. On the basis of the comprehensive analysis of development and utilization status of mineral resources and supply and demand situation of main mineral resources in northeastern China, the authors put forward countermeasures on main mineral resources sustainable supply in northeastern China.

THE SYMMETRY DESCRIPTION OF A CLASS OF FRACTIONAL STURM-LIOUVILLE OPERATOR

This paper studies the symmetry of a class of tractional Sturm-Liouville differential equations with right and left fractional derivatives. We give the Hermitian boundary condition description of this problem. Furthermore, the density of minimal operator is given. Then the symmetry of this problem is obtained.

非完备策略集下人机对抗空战决策方法

在真实的空战对抗环境中,不确定性广泛存在.本文考虑人机对抗场景中的空战决策问题,提出了一种非完备策略集下的博弈决策方法.首先,将对抗的无人机群和有人机群的动态博弈过程分解为不同的决策阶段,并将当前的决策阶段建模为一个零和博弈模型.所建模型考虑了有人机群的策略不完全可知的情形,并用一个不确定效用矩阵来描述这种非完备策略.随后,基于矩阵博弈中的最大最小策略概念,提出了非完备策略下博弈模型的求解方法,从而给出了无人机群的决策序列.最后通过仿真实验验证了所提方法的有效性.