示波器发展趋势展望

技术瞬息万变,示波器的最新应用也层出不穷。示波器制造商必须紧跟新的应用潮流,设计出能够满足用户特定需求的示波器和软件应用程序。本文将针对示波器市场出现的5个流行趋势进行分析。     

A computational study of sulfur bridged cyclooctatetraenophanes

Calculations of several thiacyclooctatetraenophanes predicted, as part of their overall geometry, substantial flattening of the cyclooctatetraene (COT) structures relative to the tub conformation generally associated with the COT molecule. The COT structures were approximately parallel to each other and the interplanar distances were predicted to be within 2.787-2.803 angstrom at the DFT/UB3YLP level of calculation. DFT/UB3LYP optimized geometries afforded significant delocalization of the COT structures in each of the thiacyclooctatetraenophanes. Hartree-Fock (HF) methods and the semi-empirical Austin Model 1 (AM1) method deviated significantly from the DFT/UB3LYP optimized geometries. Cyclooctatetraenes can undergo reversible sizing by oxidation and reduction reactions to form the aromatic dication and aromatic dianion, respectively, which could then be used to prepare molecular backbones for polymeric organometallic molecular wires. The number of bridges and the introduction of the sulfur atom have been investigated to provide disparate synthetic routes.     

示波器最重要的技术指标：购买示波器时应考虑的10个方面

在购买示波器时，您需要选择一款能够帮助您高效、精确地完成工作任务的示波器。然而，选择一款这样的示波器可能是一项令人畏惧的任务。对不同厂家的示波器的技术指标和特点进行比较往往是一个费时而使人迷惑的过程。本文介绍的这些概念就是希望能够加快选择过程，帮助您避开某些常见的陷阱。