Coupled oscillations of H2/O2/CO on silica supported rhodium catalyst

Self-sustained oscillations obtained during the catalytic oxidation of CO and H₂ were studied over Rh/SiO₂ by an FTIR-mass spectrometric technique. An average oscillatory period of 7.1±0.5 minutes was obtained for the CO/O₂ reaction at 348 K. For the H₂/O₂ oscillatory reaction the period was observed to be 1.3±0.8 minutes. When the oscillations were coupled at the same temperature, the period for both the CO/O₂ and the H₂/O₂ reactions was observed to be 7.9±0.8 minutes. The kinetic coupling of the reaction rates is explained by considering the periodic fluctuations in surface temperature which occur as a result of the more exothermic CO/O₂ reaction.     

从女性主义角度浅析《傲慢与偏见》两译本

从女性主义的角度对简·奥斯丁的作品《傲慢与偏见》的两个中文译本——孙致礼和张玲、张扬的译本进行比较。分析女性主义意识对翻译过程以及最终译本的影响。     

Electrochemical investigation of La0.4Sr0.6TiO3 synthesized in air for SOFC application

Journal of Applied Electrochemistry - La-doped titanate materials have been widely investigated as alternative Ni-free anodes for solid oxide fuel cells (SOFCs). In this study, La0.4Sr0.6TiO3 (LST)...     

Morphological evolution of primary TiC carbide in laser clad TiC reinforced FeAl intermetallic composite coating

1　INTRODUCTIONIronaluminumbasedonFeAlintermetallicalloywasexpectedtobeanimportantandpotentialhightemperaturematerial,becauseitsgoodresistancetooxidationandcorrosion ,lowdensityandhightem peraturemelting point[12 ] .However ,theintrinsicpropertiesofFeAlintermetallicalloy ,suchaslowductilityandlowfracturestrength ,limiteditsindus trialapplications .Howtoimprovemechanicalproper tiesofFeAlintermetallicalloyandexpanditsindus trialapplicationrealmwasanimportantresearchas pectformaterialworke…     

铝—钢双金属复合轧制层厚比及轧制力的研究

用实验方法研究了铝－钢双金属复合轧制时层厚比的变化规律。给出了双金属复合时轧制力的计算式。     

Redundancy filtering and fusion verification for video copy detection

Multimedia Systems - Recently, the frame fusion based video copy detection scheme provides a possibility to detect copies in a continuous query video stream. However, its computational complexity...     

Stabilization of One‐Dimensional Schrödinger Equation with Variable Coefficient under Delayed Boundary Output Feedback

This article considers stabilization of a one‐dimensional Schrödinger equation with variable coefficient and boundary observation which suffers from an arbitrary given time delay. We design an observer and predictor to stabilize the system. The state is estimated in the time span where the observation is available, and also predicted in the time interval where the observation is not available. It is shown that the estimated state feedback stabilizes the system exponentially. A numerical simulation is presented to illustrate the effect of the stabilizing controller.     

Mediating and inducing quantum correlation between two separated qubits by one-dimensional plasmonic waveguide

We investigate the dynamics of quantum correlation between two separated qubits trapped in one-dimensional plasmonic waveguide. It is found that for a class of initial states, the quantum discord shows a sudden change phenomenon during the dynamical evolution. Furthermore, we demonstrate that the quantum discord can be enhanced if a proper product of the plasmon wave number and two qubits distance is chosen. Finally, we find that the non-zero quantum discord between two qubits can be created for the states without initial quantum discord during the time evolution of the system.     

打印机概述

打印机是微型机系统的重要外部输出设备之一,可以把在微型机上设计的文档打印成令人赏心悦目的印刷品.本文主要介绍打印机的一些基础知识.