为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

Attractabilities of different diets and dietary selectivity of Chinese shrimp, Fenneropenaeus chinensis were studied thr......

考虑中立型积分微分方程(x(t)-x(t-τ))′=Ax(t)+∫t0C(t,s)x(s)ds+F(t),通过构造一个Lyapunov泛函,证明了此方程解的一致稳定性和......