Measurement of the Metal Surface Acidity/Electronegativity of Pt(110)

In previous work, it has been found that a hydrogen-covered Pt(110) surface is acidic, but quantification of the acidity has not yet been done. In this paper a spectroscopic method is developed to measure the acidity of a metal surface for the first time. The technique involves measuring the intensity of the N–H stretch from the C₅H₄XNH⁺ that forms when hydrogen coadsorbs with pyridine, 2-fluoropyridine and 3-fluoropyridine. The Bethe approximation is then used to estimate the metal surface acidity/electronegativity (MSAEL). The proton affinity/MSAEL of Pt(110) has been determined to be 907 ± 4 kJ/mol at high coverage. This is the first time the MSAEL has been measured on a metal surface. Implications for fuel cell catalysis are discussed.     

线性光耦合器LOC110的原理与应用

隔离放大器电路在通信、工业、医疗器械、电源及测试装置等仪器中是十分关键的部件，对整个系统的正常工作非常重要。LOC110是美国CLARE公司生产的线性光耦合器，本文介绍其工作原理及其在隔离放大电路中的应用。     

The mechanism of CO oxidation over Cu(110): Effect of CO gas energy

The effect of the temperature of gas phase CO upon the kinetics of the oxygen titration reaction: CO_g +O_a CO_2,g, has been studied. It is found that the reaction's rate is independant of CO gas temperature between 300 and 623 K. The activation energy (6.5 kcal/mole), dependence upon CO pressure (first-order), and independence upon oxygen coverage for 0.1 _o 0.4 are all independant of the CO gas phase temperature. This result rules out any Eley-Rideal type mechanism whereby CO reacts directly from the gas phase with an oxygen adatom without first being accommodated to the surface temperature in an absorbed state. The result is instead interpretable in terms of a Langmuir-Hinshelwood mechanism.Camille and Henry Dreyfus Foundation Teacher-Scholar Fellowship.     

Phase evolution and <110>-orientation mechanism in RTGG-processed BaTiO3 ceramics with electrical properties

The <110>-oriented BaTiO₃ ceramics were fabricated using BaCO₃ matrix and H_1.08Ti_1.73O₄.nH₂O (HTO) template particles, and the mechanism of BaTiO₃ phase formation was investigated. The dielectric, ferroelectric, and piezoelectric properties were also investigated. The transformation of the HTO phase into the TiO₂ bronze or TiO₂ (B) phase was observed at 600°C, where the BaTiO₃ nucleation was accompanied by the formation of a Ba₂TiO₄ phase. The TiO₂ phase reacted with the Ba₂TiO₄ phase at 800°C to give a BaTiO₃ phase, whereas its reaction with the BaTiO₃ resulted in the formation of BaTi₂O₅ phase that got decomposed into BaTiO₃ and Ba₆Ti₁₇O₄₀ phase at sintering temperature ≥1300°C. Sintering with samples’ embedding in BaTiO₃ powders prevented the formation of the Ba₆Ti₁₇O₄₀ secondary phase. The crystallographic orientation along the <110> direction (F₁₁₀) was developed by the epitaxial grain growth mechanism. In addition to the contribution of the grain-size increment for enhancing the F₁₁₀, the preservation of the platelike structure was also found to have a significant impact. The ceramics prepared by the embedded sintering (grain size ≈12.4 µm and F₁₁₀ = 83%) exhibited the room-temperature dielectric constant of 1708 and piezoelectric strain constant of 445 pm/V, which are higher than those of the BaTiO₃ ceramics with randomly oriented grains.     

应力时效对P110套管螺纹参数的影响

在Φ339.7mmP110高强套管研制开发中发现,螺纹加工完成后因应力时效引起管体端头直径的变化,导致螺纹参数随之变化。通过对调质处理并矫直的套管几何尺寸及螺纹参数的测量试验,测试出随时间推移钢管几何尺寸、螺纹参数的变化量,分析其变化趋势及程度。通过应力时效对钢管形体作用的机理分析,提出确保套管螺纹参数稳定的控制措施。     

关于110 kV线路重合闸的探讨

重合闸在110 kV线路供电过程中起到了非常重要的作用,它关系着电力系统运行的安全性和可靠性。在重合闸投运前,需要模拟系统的运行情况,事前试验可能存在的重合闸形式,及时发现、排除其中存在的问题,确保重合闸能够正确动作。分析了110 kV线路重合闸的原理、功能,并以某案例分析为基础,简要探讨了对110 kV线路重合闸控制的相关认识。     

Chaos emerged on the ‘edge of chaos’

Rule 110 is a complex cellular automaton (CA) in Wolfram's system of identification, capable of supporting universal computation. It has been suggested that a universal CA should be on the ‘edge of chaos’, which means that the dynamical behaviour of such a system is neither simple nor chaotic. There is no doubt that the dynamical property of Rule 110 is extremely complex and still not well understood. This paper proves the existence of subsystems on which this rule is chaotic in the sense of Devaney.     

110kV变电站综合分析装置的设计原则探讨

根据电力系统继电保护工作的实际 ,分析了 110kV及以下电力系统装设综合分析装置的必要性 ,就设计和开发 110kV变电站综合分析装置提出了理论和运行根据。     

基于ARM的指纹识别系统的设计

给出了基于ARM的指纹识别系统的设计实现方法,给出了由S3C2410、指纹传感器FPS110、存储器和通信接口等组成的硬件设计,同时也给出了系统初始化,指纹采集程序和通讯程序等软件设计。在指纹识别的可靠性及快速性上,充分展现了ARM的优势。     

REF543微机型电源备自投装置在化工厂110 kV供电系统中的应用

传统备用电源自投装置采用老式继电器逻辑组合,具有二次接线复杂、功能僵化等缺点,尤其在变电站一次系统运行方式发生改变时,容易造成误动作。基于中海化学二期110kV变电站电源备自投装置,利用微机技术的应用实践对一种新型微机备用电源自投装置设计方案及逻辑框图进行了分析,此备自投装置通过软件对不同主接线方式自动进行模式识别,可改善供电运行方式的灵活性,提高供电的安全性、可靠性。