Clinical Observation on the Case of Bacillary Dysentery in Shochiku District, Nagano Prefecture, in 1951

Article信州醫学雑誌 1(4): 196-201(1952)journal articl

Electrochemical Gating Single-Molecule Circuits with Parallel Paths

# These authors contributed equally to this work.电化学门控已成为一种可行且高效调节单分子电导的方法。在本研究中,我们证实了具有两个平行苯环的单分子电路中电子传输可以通过电化学门控控制。首先,我们利用STM-BJ技术以金为电极构筑了具有两条平行路径的单分子结。与单条路径的单分子结相比,两条路径的分子结由于具有增强性量子干涉效应,具有2.82倍的电导值。进一步地,我们利用电化学门控对具有两个平行苯环的单分结的电导进行调控,获得了333%·V-1调节比。结合DFT计算,发现在E=EF附近的V形透射系数谱图导致了实验观测的电导门控行为。本研究揭示了具有平行路径的单分子电路的电化学门控行为,并为设计高性能分子器件的分子材料提供了新的途径。通讯作者:周小顺E-mail:[email protected]:Xiao-ShunZhouE-mail:[email protected].浙江师范大学物理化学研究所,先进催化材料教育部重点实验室,浙江 金华 3210042.上海大学物理系,上海 2004441. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang, China2. Department of Physics, Shanghai University, Shanghai 200444, Chin

Application of Virtual Reality Technology in Micro Electro Mechanical System

【中文文摘】该文根据虚拟现实技术的内涵、主要特征和相关技术,按照微机电系统的特点和发展目标,研究微机电系统对虚拟现实技术的需求及其应用,研究虚拟现实技术与微机电系统的交叉融合及互动发展,提出将虚拟现实技术应用于微机电系统的研究、设计、教学、培训;提出将微机电系统应用于虚拟现实系统中。 【英文文摘】This paper proposes the application of the virtual reality(VR) technology in the research, design, teaching and training of the micro electro-mechanical systems(MEMS) after the research of MEMS's requirement for VR technology and its application prospect according to the characteristics and technical requirements of MEMS and the intension, main characteristics and relevant technologies of VR. It studies the interaction and inter-development of VR technology and MEMS, and puts forward the application of MEMS in V

Study on single pass all optical wavelength converter based on cascaded second order nonlinearity with double conversion configuration

Conference Name:2011 International Conference on Consumer Electronics, Communications and Networks, CECNet 2011. Conference Address: XianNing, China. Time:April 16, 2011 - April 18, 2011.IEEE Consumer Electronics SocietyIn this paper, the comparison of theoretical analysis and numerical simulation in conversion efficiency, bandwidth, frequency difference and multichannel propagation are expatiated distinctly according to the conversion principle and structure model of SP-cSHG+DFG-DC-AOWC (Single Pass All Optical Wavelength Converter Based on Cascaded Second Harmonic Generation and Difference Frequency Generation with Double Conversion Configuration) and SP-cSFG+DFG-DC-AOWC (Single Pass All Optical Wavelength Converter Based on Cascaded Sum Frequency Generation and Difference Frequency Generation with Double Conversion Configuration). Furthermore, it is pointed out that the structure model of SP-cSFG+DFG-DC-AOWC will be an ideal one due to its characteristics and advantages in conversion efficiency, bandwidth, frequency difference and multichannel propagation. ? 2011 IEEE

Study on the characteristics of single pass all optical wavelength converter based on cascaded second harmonic generation and difference frequency generation with double conversion configuration

Conference Name:2011 International Conference on Consumer Electronics, Communications and Networks, CECNet 2011. Conference Address: XianNing, China. Time:April 16, 2011 - April 18, 2011.IEEE Consumer Electronics SocietyIn this paper, theoretical analysis and numerical simulation are expatiated distinctly according to the conversion principle and structure model of SP-cSHG+DFG-DC-AOWC (Single Pass All Optical Wavelength Converter Based on Cascaded Second Harmonic Generation and Difference Frequency Generation with Double Conversion Configuration) relative to SP-cSHG+DFG-DC-AOWC (Single Pass All Optical Wavelength Converter Based on Cascaded Second Harmonic Generation and Difference Frequency Generation with Single Conversion Configuration). For SP-cSHG+DFG-DC-AOWC compared with SP-cSHG+DFG-SC-AOWC, the formula about total conversion efficiency (and total normalized conversion efficiency) is demonstrated detailedly, the characteristics and advantages in waveguide length and wave power are discussed deeply, and the methods and measures to get relatively higher conversion efficiency are given concretely. ? 2011 IEEE

Study on the characteristics of all optical wavelength converter based on cascaded sum frequency generation and difference frequency generation with double conversion configuration in contrast to the one with single conversion configuration

Conference Name:2013 International Conference on Information and Communication Technology for education, ICTE 2013. Conference Address: Singapore. Time:December 1, 2013 - December 2, 2013.Atlantis Press; et al; Hong Kong Education Society; Information Engineering Research Institute, USA; Trans Tech Publications inc.; WIT Transactions on Information and Communication TechnologiesIn this paper, in contrast to SP-cSFG+DFG-SC-AOWC, for SP-cSFG+DFG- DC-AOWC, the characteristic description of total conversion efficiency which is affected by waveguide length, signal wavelength, pump wavelength, wave power, and pump pulse width is discussed clearly, the advantages in total conversion efficiency are demonstrated confirmedly. Based on some particular comparison of characteristics description, both the common points and the uncommon points for the converter with similar conversion principle and similar conversion configuration are clarified obviously. ? 2014 WIT Press

陕北子洲县“７·２６”特大暴雨引发的 小流域土壤侵蚀调查

［目的］２０１７年７月２５日２０时到２６日８时陕北榆林地区突降了一场特大暴雨，造成了严重的洪 水灾害与经济损失。通过考察该次暴雨造成的土壤侵蚀危害，旨在为今后该区水土流失治理及暴雨灾害 的防御提供依据。［方法］于２０１７年８月２&mdash;６日赴暴雨受灾区子洲县，选取了清水沟、马家沟、蛇家沟３ 个典型小流域作为重点调查区域，对该次暴雨下流域内坡耕地、退耕林草地、梯田、填沟造地、淤地坝、道路 等的土壤侵蚀特征进行了调查与分析。［结果］在&ldquo;７&middot;２６&rdquo;特大暴雨洪水下，坡耕地细沟发育明显，甚至产 生小切沟；而２０００年退耕的林地和自然恢复草地以面蚀为主，无明显细沟产生；新修梯田连接两阶田面的 道路及承接路面来水的田面冲毁严重，田埂部分区段被冲开，田坎发生塌落；在削坡填沟造地区域，不仅农 作物和坝体遭到严重破坏，而且残蚀了田旁新修道路，切割裸露沟壁多处发生土体塌落；淤地坝或轻或重 都存在损毁与隐患，但在该次暴雨中滞洪拦沙作用明显。同时，在调查中发现该区陡坡耕种现象依然存 在，小流域蓄排水系统缺乏，部分水土保持工程管理与维护不到位，经济发展水平低，农民水土保持意识淡 薄。［结论］&ldquo;７&middot;２６&rdquo;特大暴雨洪水造成的土壤侵蚀依然很严重，而退耕林草地的土壤侵蚀轻微，证明水土 保持工作在该区依然十分重要。在生态环境脆弱的陕北黄土高原地区，应该继续加强环境保护措施，加大水 土保持治理力度，特别是陡坡退耕。同时，专业设计并实施小流域蓄水、引水、排水网络系统十分必要。</p

Recirculating configuration all-optical wavelength conversion by self-phase modulation in a highly nonlinear photonic crystal fiber - art no 678155

Conference Name:Conference on Passive Components and Fiber-Based Devices IV. Conference Address: Wuhan, PEOPLES R CHINA. Time:NOV 02-05, 2007.A novel architecture of all-optical wavelength conversion in a highly nonlinear bismuth oxide-based photonic crystal fiber (PCF) is demonstrated. Self-phase modulation is utilized to induce spectral broadening for the all-optical wavelength converter. A recirculating configuration is designed to obtain the twice spectral broadening. Therefore, wavelength conversion is achieved. The design and the simulation of PCF are demonstrated. The desired dispersion properties can be tailored by the parameters of bismuth oxide (Bi2O3) PCF microstructure. The propagation loss at 1550nm is about 0.8dB/m. The simulation results of PCF indicate the relationship of the effective index of the fundamental mode, the mode effective area and the holes pitch of PCF. The nonlinear coefficient is expected to be 1100W(-1)km(-1) by using bismuth oxide-based glass and reducing the effective core area. The mode-field diameter of PCF is estimated to be 1.98 mu m and the predicted small effective core area is 3.3 mu m(2). The design of Bi2O3-based PCF and the intermediate high numerical aperture fibers between Bi2O3-based PCF and single-mode fibers are considered to reduce the splicing loss. The obtained results show that the wavelength converter has a potential of wide conversion bandwidth, high response time, simple configuration and low insertion loss etc