分布式网络中基于隶属云的信任模型研究

本文根据主观信任的主观性、模糊性以及随机性特点,基于隶属云理论提出了适合于电信系统中分布式信任模型。     

谈广播电视发射技术维护

本文作者结合自身从事多年的技术维护工作,从创新的角度,从未来广播电视发射技术维护的发展方向出发,论述了技术维护工作的创新问题。     

Surface Wettability of Nanostructured Zinc Oxide Films

Zinc oxide (ZnO) nanograin and nanorod films were prepared by magnetron sputter deposition and an aqueous solution growth method. Their surface wettability was studied in relation to their surface morphologies. While the surfaces of both films were hydrophobic, the nanorod films exhibited higher surface hydrophobicity. A superhydrophobic surface was obtained on a ZnO nanorod film with a water contact angle of 151 deg. Results have shown that their surface wettability was influenced by the morphology of ZnO nanostructures, including the grain size, the length, and density of nanorods. Both types of ZnO films showed switchable wettability under ultraviolet irradiation and dark storage.     

羰基合成反应搅拌器故障诊断与处理

通过对羰基合成反应搅拌器机械密封泄漏、减速箱振动、轴承温度异常分析诊断,确定故障根本原因。经过检修并更换相关损坏备件,使羰基合成反应搅拌器投入正常运行。     

ZV—1000公共广播系统及其应用

本文较全面介绍ZV-1000公共广播系统产品的特点、组成及功能,并列举在商场、宾馆等典型公共广播系统中的应用。最后指出:该系统作为替代进口产品,在国内公共广播系统工程中有着广泛的应用前景。     

简并量子拍频激光器的动力学过程

本文采用半经典理论方法研究了在短脉冲作用下,被共振微波场驱动的三能级原子极化强度振幅和粒子数差随时间的变化。     

神经网络的VLSI实现

本文评述了当前神经网络电路实现的关键技术和研究现状,着重讨论了数字、模拟和脉冲流VLSI实现的电路技术及其未来发展。     

金属卤化物气体放电灯启动问题的探讨

本文介绍了分别改变灯内填充物含量即 NaI 和 ScI 含量的方法,探讨此变化与光源气体放电参数的关系,从而分析和研究金属卤化物灯的启动特性,从而寻求延长光源寿命的途径。     

Strained layer heterostructures, and their applications to MODFETs,HBTs, and lasers

Recent developments in strained layer epitaxial systems are reviewed. Their interest stems primarily from the additional degree of freedom that strained layers provide in the design of heterostructures and devices, which has led to device structures that can be tailored to a particular application with, in many cases, performances that are and out of reach with lattice-matched systems alone. With the advent of SiGe alloys, the concept of strained layers was extended to include the elemental semiconductors as well. Si/SiGe heterojunctions have provided a way to study quantum phenomena and explore heterojunction bipolar transistors (HBTs) and field-effect transistors (FETs). In optoelectronics, quantum well lasers with strained InGaAs active layers provide considerable reduced threshold current density. With coherently strained active layers based on GaAs, lasers with longevities superior to those with lattice-matched channels have been obtained     

射频激励快速轴向流动CO_2激光器的实验研究

在不同的放电管尺寸、光腔参数、CO_2混合气体的压力、风机的体积抽速下测得了射频激励快轴流CO_2器件的激光输出特性曲线、阈值曲线。实验找出了CO_2混合气体的最佳配比。将实验结果与直流激励同一器件的输出做了比较。