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Chinese Journal of Chemical Engineering 2017年第9期25卷 1217-1221页

作者： Xiaolong Xu Haihua He Jia Zhao Bailin Wang shanchuan gu Xiaonian Li Institute of Industrial Catalysis of Zhejiang University of Technology State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology

Mercuric chloride supported on activated carbon(HgCl_2/AC) is used as an industrial catalyst for the hydrochlorination of acetylene. Loss of HgCl_2 by sublimating from the surface of activated carbon causes the irreversible deactivation of mercury catalyst and environmental pollution. In this work, a ligand coordination approach based on the Principle of Hard and Soft Acids and Bases(HSAB) was employed to design more stable lowmercury catalyst. The low-mercury catalysts(4% HgCl_2 loading) were prepared by using HgCl_2 and potassium halides(KX, X = Cl, I) as precursors. The HgCl_2-4KI/AC catalyst showed best catalytic stability than HgCl_2/AC and HgCl_2-4KCl/AC in the hydrochloriantion of acetylene. HgCl_2 could form more stable complex with KI,K_2HgI_4 as the main active component of the HgCl_2-4KI/AC catalyst. The characterizations of XRD and EDX analysis illustrated that the active component of HgCl_2-4KI/AC was highly dispersed on the surface of activated *** sublimation rates of HgCl_2 from the catalysts verified that the active component with larger stability constant had better thermal stability. Using Hg(Ⅱ) complexes with high stability constant as the active component may be the research direction of developing highly stable low-mercury catalyst for the hydrochlorination of acetylene.

关键词： Low-mercury catalyst Sublimation K2HgI4 Ligand coordination Acetylene hydrochlorination

Crosstalk in polymer microelectrode arrays

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Nano Research 2021年第9期14卷 3240-3247页

作者： Yi Qiang Wen gu Zehua Liu shanchuan Liang Jae Hyeon Ryu Kyung Jin Seo Wentai Liu Hui Fang Department of Electrical and Computer Engineering Northeastern UniversityBostonMA 02115USA Department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA Department of Bioengineering Northeastern UniversityBostonMA 02115USA

Thin-film polymer microelectrcxje arrays(MEAs)facilitate the high-resolution neural recording with its superior mechanical ***,the densely packed electrodes and interconnects along with the ultra-thin polymeric encapsulation/substrate layers give rise to non-negligible crosstalk,which could result in severe interference in the neural signal *** to the lack of standardized characterization or modeling of crosstalk in neural electrode arrays,to date,crosstalk in polymer MEAs remains poorly *** this work,the crosstalk between two adjacent polymer microelectrodes is measured experimentally and modeled using equivalent ***,this study demonstrated a two-well measuring platform and systematically characterized the crosstalk in polymer microelectrodes with true isolation of the victim channel and precise control of its grounding condition.A simple,unified equation from detailed circuit modeling was proposed to calculate the crosstalk in different *** element analysis(FEA)analysis was conducted further to explore the crosstalk in more aggressively scaled polymer electrode *** addition to standardizing neural electrode array crosstalk characterization,this study not only reveals the dependence of the crosstalk in polymer MEAs on a variety of key device parameters but also provides general guidelines for the design of thin polymer MEAs for high-quality neural signal recording.

关键词： crosstalk effect flexible microelectrodes equivalent circuit modelling finite element analysis polymer

基于PLC的110MW脉冲调制器控制器设计

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核技术 2007年第10期30卷 864-867页

作者：袁启兵谷鸣陈志豪闫山川傅禄新范学荣中国科学院上海应用物理研究所上海201800

论述了110MW脉冲调制器控制器的设计,简要比较了几种在工业场合中常用的控制器。调制器控制器核心采用PLC可编程控制器。控制器实现了对调制器联锁信号、电路状态信号的实时监测,闸流管预热系统、速调管预热系统等流程的控制,高压恒流... 详细信息

论述了110MW脉冲调制器控制器的设计,简要比较了几种在工业场合中常用的控制器。调制器控制器核心采用PLC可编程控制器。控制器实现了对调制器联锁信号、电路状态信号的实时监测,闸流管预热系统、速调管预热系统等流程的控制,高压恒流充电电源的控制以及与加速器控制室的数据通信。调制器长期运行表明控制器工作稳定、可靠。

关键词：脉冲调制器 PLC可编程控制器安全联锁高压恒流充电电源

Online single-shot characterization of ultrafast pulses from high-gain free-electron lasers

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Fundamental Research 2022年第6期2卷 929-936页

作者： Li Zeng Chao Feng Duan gu Xiaofan Wang Kaiqing Zhang Bo Liu Zhentang Zhao Institute of Advanced Science Facilities ShenzhenGuangdong 518107China Shanghai Advanced Research Institute Chinese Academy of ScienceShanghai 201210China

X-ray free-electron lasers(FELs)provide cutting-edge tools for fundamental researches to study nature down to the atomic level at a time-scale that fits this resolution.A precise knowledge of temporal information of FEL pulses is the central issue for its *** we proposed and demonstrated a novel method to determine the FEL temporal profiles *** robust method,designed for ultrafast FELs,allows researchers to acquire real-time longitudinal profiles of FEL pulses as well as their arrive times with respect to the external optical laser with a resolution better than 6 *** on this method,we can also directly measure various properties of FEL pulses and correlations between them *** helps us to further understand the FEL lasing processes and realize the generation of stable,nearly fully coherent soft X-ray laser pulses at the Shanghai Soft X-ray FEL *** method will enhance the experimental opportunities for ultrafast science in various areas.

关键词： X-ray free-electron laser Ultrafast pulses Single-shot characterization Correlation analysis Laser-electron timing feedback

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格林-巴利综合征1例营养支持体会

中国临床营养杂志 2001年第1期9卷 55-55页

作者：王山川顾奎琴重庆市第二人民医院营养科 402160 解放军总医院营养科

患者男性，27岁。因四肢瘫、肌张力、腱反射低、诊断格林-巴利入院。行气管切开，用呼吸机辅助呼吸。脑脊液检查：有蛋白-细胞分离，糖及氯化物含量正常。入院后因吞咽困难，鼻饲牛奶、米汤，每日约800 ml。治疗6周，消瘦明显，四肢远... 详细信息

患者男性，27岁。因四肢瘫、肌张力、腱反射低、诊断格林-巴利入院。行气管切开，用呼吸机辅助呼吸。脑脊液检查：有蛋白-细胞分离，糖及氯化物含量正常。入院后因吞咽困难，鼻饲牛奶、米汤，每日约800 ml。治疗6周，消瘦明显，四肢远端肌肉萎缩。营养科会诊见患者面色苍白，不能说话。身高181 cm，入院时体重70 kg，现体重50 kg，患病6周体重丢失率28.5%，为体重显著丢失。BMI 15.26(男性正常值为20～25，＜16为三级危险值)，TSF 7 mm(正常值8～10 mm),MAC 20 cm(正常值27 cm),MAMC 17.8 cm(正常值25.3 cm)。血清总蛋白58.6 g/L(正常值50～80 g/L)，白蛋白34.6 g/L(正常值35～50 g/L)。诊断重度营养不良。

关键词：格林-巴利综合征营养支持诊断

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大连极紫外相干光源

中国激光 2019年第1期46卷 43-50页

作者：余永李钦明杨家岳王光磊史磊丁洪利陶凯汤振兴贺志刚陈志超田宇欢戴东旭吴国荣张未卿杨学明冯超陈思王震谷端陈杰刘晓庆兰太和冯冽张文艳钟少鹏张俊强李林肖诚成李昊赵欢陈广花朱海君丁建国黄毛毛张伟赖龙伟杨夫彬王光宏相升旺胡晓刘以勇孙森高飞蒋志强周孝轩刘永芳吴勇华陈志豪王锐萍黄大章张猛邓海啸李宾林国强俞路阳阎映炳阎山川夏晓彬周巧根刘波顾强谷鸣方国平冷用斌殷立新王东赵振堂中国科学院大连化学物理研究所分子反应动力学国家重点实验室辽宁大连116023 中国科学院大学北京100049 中国科学院上海应用物理研究所上海201204

先进光源的发展在前沿科学研究中发挥的作用越来越重要。近十年来,飞速发展的自由电子激光技术为科学家们提供了探索未知世界、发现新科学规律和实现技术变革的重要工具。建成的大连极紫外(EUV)相干光源的运行波段为50～150nm,单脉冲能... 详细信息

先进光源的发展在前沿科学研究中发挥的作用越来越重要。近十年来,飞速发展的自由电子激光技术为科学家们提供了探索未知世界、发现新科学规律和实现技术变革的重要工具。建成的大连极紫外(EUV)相干光源的运行波段为50～150nm,单脉冲能量大于100μJ,且可提供10-12 s和10-13 s量级的超快激光脉冲,是我国第一台自由电子激光用户装置,并且是国际上唯一运行在极紫外波段的自由电子激光用户装置,在世界范围内为用户提供具有高峰值亮度和超短脉冲的极紫外激光。大连EUV相干光源是由国家自然科学基金委资助、由中国科学院大连化学物理研究所和上海应用物理研究所共同承担的重大科学仪器研制项目,目标是打造一个以先进极紫外光源为核心、主要用于能源基础科学研究的光子科学平台。

关键词：激光光学自由电子激光极紫外激光能源基础研究