With the idea of the phononic crystals, the beams with periodic structure are designed. Flexural vibration through such ......

外辐射源雷达系统具有隐蔽性好、反隐身能力及抗干扰能力强等优点,但其中高频频段信号普遍存在距离分辨率较差的问题。通过建立仅......

Discrete-time chaotic circuit implementations of a tent map and a Bernoulli map using switched-current (SI) techniques a......

本文给出Riemann—ξ函数sum from n=1 to ∞(1/n~z)求和的一种行之有效的简单方法,并推导出与有关文献中的某些不同的结论。......

Zhao (2003a) first established a congruence for any odd prime p>3, S(1,1,1;p)≡-2Bp-3 (mod p), which holds when p=3 evid......