目的：观察小儿下肢手术在神经刺激器引导下应用腰丛-坐骨神经联合阻滞的可行性。
Objective: to observe the feasibility of combined lumbar plexus and sciatic nerve block guided by nerve stimulator in children for lower limb surgery.
详细介绍了采用单神经元自适应PS D控制器对电流环进行调节的方法，使电机能稳定工作在变负载条件下。
Controlling method of current loop with single neuron adaptive PSD controller which can make motor work stably in the condition of changing load is discussed in detail.
介绍了采用热催化传感器在不同的工作温度下，通过BP人工神经网络对可燃混合气体进行分析的新方法。
A new method of analysis to mixed inflammable gas with a heat catalytic sensor worked in different conditions through BP artificial neural network is introduced.
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