这是一个典型的不稳多谐振荡器电路。掌握好此电路对以后学习大有好处。 -This is a typical unstable multi-vibrator circuit. After mastering this circuit is to learn a lot of good.

针对目前自动称重配料系统中采用传统PID控制的不足、系统误差不稳定、动态特性不理想，提出了一种基于神经网络PID控制的算法。该系统传递函数为 ,本文设计BP神经网络为三层，输入层4个节点,隐层为5个节点，输出层为3个节点。-For automatic weighing batching system currently used in traditional PID control deficiencies, systematic errors unstable dynamics is not

"1D FDTD solution for open boundary in a unitless domain with a Courant factor > 1 (Unstable solutions leading to blow-up)" -"1D FDTD solution for open boundary in a unitless domain with a Courant factor > 1 (Unstable solutions leading

c6713解码软件关于列车运行产生的不稳定频率，包括不稳定波形-c6713 decoding software on the train frequency to produce instability, including unstable wave