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High Q and high gradient performance of the first medium-temperature baking 1.3 GHz cryomodule

Physical Review Accelerators and Beams 2024年第9期27卷 092003页

作者： Weimin Pan Jiyuan Zhai Feisi he Rui Ge Zhenghui Mi Peng Sha Song Jin Ruixiong Han Qunyao Wang Haiying Lin Guangwei Wang xuwen Dai Zhanjun Zhang Mei Li Minjing Sang Liangrui Sun Rui Ye Tongxian Zhao Shaopeng Li Keyu Zhu Baiqi Liu Xiaolong Wang Xiangchen Yang Xiaojuan Bian Xiangzhen Zhang Huizhou Ma Jianbing Zhao Liang Zhang Hui Zhao Runbing Guo Zhihui Mu Conglai Yang Xiaobing Zheng Chao Dong Hongjuan Zheng Zhengze Chang Xiaochen Yang Tongming Huang Qiang Ma Zihan Wang Ming Liu Wenzhong Zhou Senyu Chen Chinese Academy of Sciences Beijing 100049 China Beijing 100049 China

The world’s first 1.3 GHz cryomodule containing eight 9-cell superconducting radio-frequency (rf) cavities treated by medium-temperature furnace baking (mid-T bake) was developed at the Institute of High Energy Physics, Chinese Academy of Sciences. The 9-cell cavities in the cryomodule achieved an unprecedented high average intrinsic quality factor (Q0) of 3.8×1010 at 16 MV/m and 3.6×1010 at 21 MV/m in the horizontal test. The cryomodule can operate stably up to a total continuous wave rf voltage greater than 193 MV, with an average cavity usable accelerating gradient of more than 23 MV/m. The results significantly exceed the specifications of Circular Electron Positron Collider and Dalian advanced light source and the other high repetition rate free electron laser facilities [Linac Coherent Light Source II (LCLS-II), LCLS-II-high energy, Shanghai High Repetition Rate X-ray FEL and Extreme Light Facility, Shenzhen Superconducting Soft X-Ray Free Electron Laser, etc.]. There is evidence that the mid-T bake cavity may not require fast cooldown or long processing time in the cryomodule. This paper reviews the cryomodule performance and discusses some important issues in cryomodule assembly and testing.

关键词： Radio frequency techniques Superconducting RF

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离子交换树脂吸附黄连素废水中铜离子的研究

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环境工程技术学报 2017年第2期7卷 181-187页

作者：崔晓宇何绪文单永平曾萍刘瑞霞孙晨中国矿业大学(北京)化学与环境工程学院北京100083 环境基准与风险评估国家重点实验室中国环境科学研究院北京100012 中国环境科学研究院城市水环境科技创新基地北京100012 德国亥姆霍兹环境研究中心环境微生物学院莱比锡04318

以Cu^(2+)-黄连素混合体系的含铜制药废水为研究对象,考察3种离子交换树脂(D152、D113和D401)对含铜废水中Cu^(2+)和黄连素的吸附性能并对树脂进行了筛选,对D401树脂进行了吸附动力学和吸附热力学拟合分析,同时考察该树脂在黄连素竞争... 详细信息

以Cu^(2+)-黄连素混合体系的含铜制药废水为研究对象,考察3种离子交换树脂(D152、D113和D401)对含铜废水中Cu^(2+)和黄连素的吸附性能并对树脂进行了筛选,对D401树脂进行了吸附动力学和吸附热力学拟合分析,同时考察该树脂在黄连素竞争吸附影响下对Cu^(2+)的去除效果。最后,在静态试验基础上开展了动态试验,考察D401树脂柱在3种流速[1、2和5 BV(柱体积)/h]下,进样量为1~20 BV时出水的Cu^(2+)和黄连素浓度。结果表明:D401树脂的比吸附量随温度升高而增加,随树脂投加量的增加而降低;该树脂在较宽的pH范围内对Cu^(2+)具有很好的选择吸附性,pH为5.0是最佳吸附条件,此时比吸附量可达39.87 mg/g。吸附过程可以通过Langmuir吸附等温线和伪二级动力学模型进行描述。动态试验中,树脂柱在1 BV/h的流速下,对Cu^(2+)有较好的去除效果;在3种流速条件下,对黄连素的吸附率均较低,进一步验证了该型树脂对Cu^(2+)具有很好的选择吸附性。

关键词：树脂铜离子吸附热力学动力学黄连素废水

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基于校院教育合作种子科学专业应用型特色人才培养模式的构建——以青岛农业大学为例

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种子 2020年第2期39卷 149-151,155页

作者：江绪文李贺勤宋希云王元英戴培刚孟鹤王建华青岛农业大学山东青岛266109 中国农业科学研究院烟草研究所山东青岛266109 中国农业大学北京100094

我国种业要做大做强,人才培养是关键。校院教育合作是产学研结合的一种重要形式,对提高高等农业院校种业人才培养质量具有重要意义。本文借鉴青岛农业大学烟草专业校院教育合作成功经验,结合种子科学专业应用型特色人才培养目标,从人才... 详细信息

我国种业要做大做强,人才培养是关键。校院教育合作是产学研结合的一种重要形式,对提高高等农业院校种业人才培养质量具有重要意义。本文借鉴青岛农业大学烟草专业校院教育合作成功经验,结合种子科学专业应用型特色人才培养目标,从人才培养方案修订和优化、师资队伍建设、课程教材体系改革、人才培养实践基地建设、教育合作配套制度措施制定等方面构建校院教育合作种子科学专业人才培养新模式,并为培植好人才成长的沃土提出了一些建设性策略。

关键词：校院教育合作种子科学专业实践创新应用型特色人才培养模式

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Fabrication of CoNPs-embedded porous carbon composites based on morphochemical imprinting strategy for detection of H2O2 released from living cells

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ELECTROCHIMICA ACTA 2019年 321卷 134717-000页

作者： Lu, Nannan Zheng, Bo Gu, Yue Yan, Xiaoyi Zhang, Tingting Liu, he Xu, Haixin Xu, Zhiqian Li, xuwen Zhang, Zhiquan Jilin Univ Coll Chem Changchun 130012 Jilin Peoples R China Weinan Normal Univ Coll Chem & Mat Weinan City 714099 Peoples R China

Rational construction of biosensor to determine reactive oxygen species (ROS) generated from living cells is one of the great challenges in physiological and pathological fields. herein, for the first time, a novel Co nanoparticles (CoNPs) embedded walnut-like N-doped porous carbon microsphere (Co@NCS) can be synthesized using dual imprinting strategy by pyrolysis and acid leaching. The distinct morphology and chemical characteristic of melamine cyanurate (MC) aggregates can be imprinted in the carbon source derived from glucose during the pyrolysis process. According to our research, with synergistic effect of CoHPs and NCS, the Co@NCS shows an excellent electrochemical activity toward the reduction of hydrogen peroxide (H2O2). The Co@NCS modified electrode exhibits a wider linear detection response with the range from 0.5 mu M to 7500 mu M and a low detection limit of 88 nM (S/N = 3). Moreover, with desirable selectivity, decent reproducibility and satisfied anti-interference performance, the fabricated biosensor can be applied to determine H2O2 in human serum samples and that released from living cell, indicating the potential applications in the fields of pathological and physiological sensing. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Co nanoparticles Porous carbon microspheres Biosensor Hydrogen peroxide Living cells

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氧化还原修复重金属污染土壤的文献计量学分析

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环境保护科学 2017年第2期43卷 116-123页

作者：马妍陈家琪徐东耀左海清门铭何绪文中国矿业大学(北京)化学与环境工程学院北京100083

基于Web of Science和中国知网(CNKI)的数据源,选择对应数据库、设定年限,检索相关文献和专利,运用文献计量学方法,并借助Origin、Excel等绘图制表工具对数据结果进行了统计、分析和对比,比较直观地展现出重金属污染土壤氧化还原修复技... 详细信息

基于Web of Science和中国知网(CNKI)的数据源,选择对应数据库、设定年限,检索相关文献和专利,运用文献计量学方法,并借助Origin、Excel等绘图制表工具对数据结果进行了统计、分析和对比,比较直观地展现出重金属污染土壤氧化还原修复技术的总体情况、国内外发展现状和趋势、国内外发展差距,并从关键词的发展演替角度分析研究热点与方向,为氧化还原修复技术相关学科发展与研究等提供决策参考。

关键词：氧化还原重金属土壤修复文献计量学

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Interdiffusivities and atomic mobilities in FCC Co-Mo-W alloys

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CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND TheRMOCheMISTRY 2015年 49卷 35-40页

作者： he, xuwen Zhang, Weibin Yan, Mingyuan Chen, Chong Du, Yong Zhang, Lijun Huang, Bai-yun Cent S Univ State Key Lab Powder Met Changsha 410083 Hunan Peoples R China

By employing six groups of bulk diffusion couples together with electron probe microanalysis technique, the composition dependence of ternary interdiffusion coefficients in Co-rich fcc Co-Mo-W alloys at 1373 K was determined via the Whittle and Green method. The experimental interdiffusion coefficients were critically assessed to obtain the atomic mobilities of Co, Mo and Win fcc Co-Mo-W alloys by using the DICTRA (Diffusion-Controlled TRAnsformations) software package. Comprehensive comparisons between the calculated and experimental data show that a good agreement is obtained for diffusivities in binary Co-Mo and ternary Co-Mo-W systems. In addition, a further verification of the obtained atomic mobilities was carried out through comparing the model-predicted concentration profiles/diffusion paths of several diffusion couples with the corresponding experimental data. The results indicate that the atomic mobilities can reproduce the experiment data reasonably well. This work contributes to the establishment of a Co-based kinetic database for computational design of superalloys. (C) 2015 Elsevier Ltd. All rights reserved.

关键词： Diffusion couple Atomic mobility Fcc Co-Mo-W alloys DICTRA Fick's law

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Biomedical Network Regulated by Acanthopanacis Cortex (Wu-Jia-Pi) for Ossification

Biomedical Network Regulated by Acanthopanacis Cortex (Wu-Ji...

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International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery

作者： Junping Zhan Hongtao Guo Yun Yang Yutao Qi Miaofeng Li xuwen he Guang Zheng The first affiliated hospital of Henan University of TCM The second affiliated hospital of Henan University of TCM School of Information Science & Engineering Lanzhou University

ISBN: (纸本)9781509040940

Acanthopanacis Cortex (AC) is a Chinese herbal medicine (Wu-Jia-Pi in PinYin) which is recognized with therapeutic effect of "strengthening bone and sinew", yet its regulating biological network is still obscure. In this study, started from AC's chemical compounds, their direct target proteins were filtered out. Then these targeted proteins were annotated with biological processes under the framework of Gene Ontology (GO) terms' hierarchical networks which were overrepresented and enriched with them with statistic significant p-value set to 0.05. In the biological process hierarchy networks, ossification formed a big one with bone formation associated biological processes. Further protein-protein interaction analysis with these targeted proteins and bone expressed ones formed a clear and concise protein-regulation network for ossification which should be responsible for the therapeutic effect of "strengthening bone and sinew". This study proposed a new approach of analyzing biological functions of a specified Chinese herbal medicine targeting certain therapeutic effect.

关键词： Acanthopanacis Cortex Ossification Chinese herbal medicine Protein-protein interaction Biomedical network

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High Q and high gradient performance of the first medium-temperature baking 1.3 GHz cryomodule

arXiv

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arXiv 2023年

作者： Zhai, Jiyuan Pan, Weimin he, Feisi Ge, Rui Mi, Zhenghui Sha, Peng Jin, Song Han, Ruixiong Wang, Qunyao Lin, Haiying Wang, Guangwei Li, Mei Sang, Minjing Sun, Liangrui Ye, Rui Zhao, Tongxian Li, Shaopeng Zhu, Keyu Liu, Baiqi Wang, Xiaolong Yang, Xiangchen Bian, Xiaojuan Zhang, Xiangzhen Ma, Huizhou Dai, xuwen Zhang, Zhanjun Zhang, Liang Zhao, Hui Guo, Runbin Mu, Zhihui Yang, Conglai Zheng, Xiaobing Dong, Chao Huang, Tongming Ma, Qiang Zheng, Hongjuan Liu, Ming Wang, Zihan Zhou, Wenzhong Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Key Laboratory of Particle Acceleration Physics & Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Center for Superconducting RF and Cryogenics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China

World’s first 1.3 GHz cryomodule containing eight 9-cell superconducting radio-frequency (RF) cavities treated by medium-temperature furnace baking (mid-T bake) was developed, assembled and tested at IheP for the Dalian Advanced Light Source (DALS) and CEPC R&D. The 9-cell cavities in the cryomodule achieved an unprecedented highest average Q0 of 3.8 × 1010 at 16 MV/m and 3.6 × 1010 at 21 MV/m in the horizontal test. The cryomodule can operate stably up to a total CW RF voltage greater than 191 MV, with an average cavity CW accelerating gradient of more than 23 MV/m. The results significantly exceed the specifications of CEPC, DALS and the other high repetition rate free electron laser facilities (LCLS-II, LCLS-II-he, SHINE, S3FEL). There is evidence that the mid-T bake cavity may not require fast cool-down or long processing time in the cryomodule. This paper reviews the cryomodule performance and discusses some important issues in cryomodule assembly and testing. © 2023, CC BY.

关键词： Free electron lasers

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超细玻璃纤维棉的研究进展

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合成纤维工业 2021年第6期44卷 71-75页

作者：王晶喜何昭慧李诗佳鲍煦文鲁林涵王至知张泽武南京工程学院材料科学与工程学院江苏南京211167 江苏省先进结构材料及应用技术重点实验室江苏南京211167 浙江福莱新材料股份有限公司浙江嘉兴314117

介绍了超细玻璃棉的制备工艺技术,其制备工艺技术有离心喷吹技术、火焰喷吹技术、气流成网技术、湿法成毡技术等,当前以离心喷吹技术和火焰喷吹技术为主。重点介绍了超细玻璃棉制备过程中用到的黏结剂,并对黏结剂的种类、使用技术及其... 详细信息

介绍了超细玻璃棉的制备工艺技术,其制备工艺技术有离心喷吹技术、火焰喷吹技术、气流成网技术、湿法成毡技术等,当前以离心喷吹技术和火焰喷吹技术为主。重点介绍了超细玻璃棉制备过程中用到的黏结剂,并对黏结剂的种类、使用技术及其对超细玻璃棉性能的影响进行了阐述。从超细玻璃纤维直径的细化、黏结剂改性、与第三组分复合方面综述了超细玻璃纤维棉的改性状况。指出从优化超细玻璃纤维棉毡的制备工艺、复合方式等方面进一步改进超细玻璃纤维棉毡的组分和微观结构,以提升超细玻璃纤维棉毡的阻隔性能。

关键词：玻璃纤维棉超细制备工艺黏结剂改性应用进展

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北京某污水处理厂污泥重金属污染特征、潜在生态风险及健康风险评价

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环境科学学报 2016年第3期36卷 1092-1098页

作者：何绪文房增强王宇翔贾梦瑶宋俊颖程言君中国矿业大学(北京)化学与环境工程学院北京100083 轻工业环境保护研究所北京100089

连续采集了北京市某污水处理厂污泥,样品经过微波消解后利用ICP-OES测定重金属含量,同时,利用BCR连续提取分析方法分析了污泥中重金属赋存形态.在分析测定污泥中Pb、Zn、Cd、Cr、As、Ni、Cu 7种重金属含量及形态的基础上,开展了污泥重... 详细信息

连续采集了北京市某污水处理厂污泥,样品经过微波消解后利用ICP-OES测定重金属含量,同时,利用BCR连续提取分析方法分析了污泥中重金属赋存形态.在分析测定污泥中Pb、Zn、Cd、Cr、As、Ni、Cu 7种重金属含量及形态的基础上,开展了污泥重金属污染水平评价、潜在生态风险评价及健康风险评价.结果表明,污泥中重金属含量最高的是Zn,含量为930.08 mg·kg-1,残渣态及可提取态所占比例最高的元素分别是Pb和Ni,所占比例分别为80.86%及18.84%;污泥重金属综合污染指数为4.84,属重度污染;污泥重金属潜在环境综合风险指数为237.60,属极高生态风险.基于健康风险评价模型建立两条暴露途径,分别对儿童及成人进行健康风险评价,得出儿童非致癌指数及致癌指数分别为2.02×10-1和1.44×10-4,而成人非致癌指数及致癌指数分别为7.21×10-2和5.13×10-5.

关键词：污泥重金属 BCR 污染水平生态风险健康风险

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