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采用物理气相沉积的方法通过控制生长参数,在硅衬底上获得不同形貌的氧化锌纳米阵列.在金属场发射系统中测量了它们的场致电子发射性能,发现阴极发射电流不稳定主要是由于氧化锌纳米阵列的不均匀性造成的.采用高压励炼技术可以增强氧化锌场发射的稳定性,使电流波动明显降低.此外,形貌对氧化锌纳米阵列的场发射电流密度和阈值电压有明显影响,而且不同形貌的氧化锌纳米阵列的抗溅射能力也不相同

Guaranteed Zero Reading for OV Input on All Scales The Intersil ICL7106 and ICL7107 are high performance, low True Polarity at Zero for Precise Null Detection power, 312 digit A/D converters. Included are seven seg- 1pA Typical Input Current ment decoders, display drivers, a reference, and a clock

General Description de range of applica is local on card bypassing is needed only if the regulator is located far from 9 gulation, eliminating the distribution problems associated the filter capacitor of the power supply

一、了解一个典型机电一体化产品的设计思想,形成对机电一体化设计的基本认识。 二、培养机电产品分析的初步能力

General Description hese devices need only one external com ation capacitor at the output. Tthe LM? aged in the to-220 power package and is capable applications requiring other voltages, see LM137 data 4 supplying 1.5A of output current These regulators employ internal current limiting safe area Features a Thermal, short circuit and sa tually all overload conditions

The OP07 is a precision operational amplifier with Ultra Low offset Voltage: 10uV for the OPO7A), input offset drift of 0. 2uv/C an Ultra Low Offset Voltage Drift0.2μ° put bias current of 0.7nA the wide inp o Ultra Stable vs. Time: 0.2u V/Month 110dB minimum(OP07A), plus high input Ultra L。wNo|e:035

General Description de range of applica is local on card bypassing is needed only if the regulator is located far from 9 gulation, eliminating the distribution problems associated the filter capacitor of the power supply rith single point regulation. The voltages available allow For output voltage other

知识结构 全书可以分为以下五个部分: 1、常用仪器的使用(第1章) (1)信号的产生(信号发生器)以及信号的观测(示波器、数字万用表):

假定我们对一个处于热平衡的恒温(T的体系感兴趣。对该 热力学问题我们做如下的表述。设有一个包含N个粒子的恒温的 平衡态系统,我们要计算该系统的可观测量A,即该物理量的平 均值 (A(T)=2-A( ((') 其中H(x)为系统的哈密顿量描述,f(为分布密度函数,称为 配分函数,它是归一化常数