13 research outputs found
THE STUDY OF CONSUMER IMAGING MARKETING DEVELOPING STRATEGY OF KODAK (CHINA) COMPANY
The development of Kodak (China) Co. Ltd. is a wonderful case study of how an international company invests in China successfully. This is because of Kodak’s success full programs and the time when Kodak starts her changes. Kodak changed her marketing strategy and converted from a mass operation model to a lean manufacturing model. Kodak strives to convert from a traditional company to a more eff...学位:管理学硕士院系专业:管理学院工商管理教育中心_工商管理硕士(MBA)学号:X20021500
隧道电子和局域场对固液界面纳米区域反应的影响——控电位下的Si(111)表面的STM诱导纳米刻蚀
隧道电子和局域场对固液界面纳米区域反应的影响①——控电位下的Si(111)表面的STM诱导纳米刻蚀谢兆雄*蔡雄伟施财辉毛秉伟田昭武(厦门大学固体表面物理化学国家重点实验室物理化学研究所化学系厦门361005)扫描隧道显微技术(STM)目前已成为纳米加..
In situ FTIR Spectroscopic Investigations of Abnormal InFrared Properties of Absorption of CO and SCN--- on Dispersed Pt and Pd SurFaces
在玻碳基底上沉积PT和Pd,在以CO和SCn-为探针分子的电化学现场fTIr反射光谱研究中,首次观察到异常红外光学行为,其中包括吸附物种的谱带方向倒反以及谱峰强度显著增强等.The in situ molecular-probe FTIR spectroscopy was employed in the present workto study the adsorption of CO and SCN- on surFaces of dispersed Pt and Pd thin layers,which were deposited electrochemically on glassy carbon (denoted as Pt/GC and Pd/GC)uner voltanmmetric conditions.Abnormal IR Features of adsorption of CO and SCN- andPt/GC and Pd/GC have been observed For the First time.In comparison with IR Features ofadsorption of these molecules on smooth Pt and Pd electrodes, the abnormal IR Featuresconsist of mainly the inversion of the direction of IR band and the enhancement of bandintensities.The enhancement Factors were evaluated at 20 For linearly bonded CO on the Pt/GCsurFace anal at 26 For bridge bonded CO on the Pd/GC surFace.Nevertheless other spectralFeatures(the vibrational Frequency, the Stark eFFects, etc.) are nearly the same as thoseobserved on smooth Pt and Pd electrodes, and no signiFicant diFFerence in IR Features presentedFor adsorption of solution species (CO2, SCN- ) on the dispersed surFaces.The surFaceroughness of these dispersed electrodes was measured relatively small (1.6 For Pt/GC and 1.2For Pd/GC).The present study discovered an interesting IR property of dispersed metallicthin layers, and suggested that the in situ iR spectra of larger signal to noise ration may beobtained by employing the specially prepared Pt/GC and Pd/GC electrodes.国家自然科学基
Application of Electrochemical Scanning Probe Microscopes in Characterization and Modification of Solid liquid Interfaces
[中文文摘]固-液界面(主要指电化学界面)是进行物理化学过程的重要场所,而界面的微观结构起着十分关键的作用.电化学扫描探针显微镜(ECSPM)已成为研究固-液界面结构的有力的工具.主要包括电化学扫描隧道显微镜(ECSTM)、电化学原子力显微镜(ECAFM)和扫描电化学显微镜(SECM).结合实验室近年来的研究工作和最新结果,从方法论的角度讨论ECSPM特点、固-液体系在ECSPM表面研究和表面修饰加工中所具有的独特优势以及研究动向.[英文文摘]The microscopic structure of the solid liquid interfaces (mainly the electrochemical interfaces) plays important roles to physico chemical processes taking place in the interfaces. Electrochemical scanning probe microscopes (ECSPM) have become one of the most powerful techniques for studies of solid liquid interfaces. Electrochemical scanning tunneling microscopy (ECSTM),electrochemical atomic force microscopy (ECAFM) and scanning electrochemical microscopy (SECM) are the major techniques under the catego ry of ECSPM. Based on authors’work, the paper has described unique advantages of ECSPM in characterizat ion and modification of so lid-liquid interfaces from the methodo logical point of view.国家自然科学基金, 国家教委优秀年轻教师基金
Effects of Tunneling Electrons and Local Field on Nanometer Region Solid / Liquid Interfacial Reactions ——Potential Controlled STM Induced Nanoscale Modification of H terminated Si(111) Surfaces
隧道电子和局域场对固液界面纳米区域反应的影响①——控电位下的Si(111)表面的STM诱导纳米刻蚀谢兆雄*蔡雄伟施财辉毛秉伟田昭武(厦门大学固体表面物理化学国家重点实验室物理化学研究所化学系厦门361005)扫描隧道显微技术(STM)目前已成为纳米加...H terminated n Si(111) surface was found to be etched in 0.5% HF solution in nanometer scale while scanning the STM tip when the substrate potential was somehow lower than the open circuit potential at tunneling condition of V b=+1.0 V (tip positive), I t=1 nA. Much more stable Si surface was achievable at potentials much more negative than the open circuit potential (such as 500 mV negative to OCP) under the same tunneling condition. Furthermore, the etching rete at less negative potential was found to be somehow related to the tunneling current. These results indicate that the STM induced local modification of Si(111) surface is electrochemically controllable. A proposed model of the hole injection through the tunneling current is put forward to account for the induced etching of Si surface.作者联系地址:厦门大学固体表面物理化学国家重点实验室物理化学研究所Author's Address: State Key Laboratory of Physical Chemistry of Solid Surfaces, Institute of Physical Chemistry, Dept. of Chem., Xiamen Univ., Xiamen 36100
Prediction of Energy Resolution in the JUNO Experiment
International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors
JUNO Sensitivity on Proton Decay Searches
The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is years, competitive with the current best limits on the proton lifetime in this channel
JUNO sensitivity on proton decay p → ν K + searches*
The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via is 36.9% ± 4.9% with a background level of events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies
