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arXiv 2021年

作者： Mi, Zhenghui He, Feisi Pan, Weimin Sha, peng Zhai, Jiyuan Dai, xuwen Jin, Song Zhang, Zhanjun Dong, Chao Liu, Baiqi Zhao, Hui Ge, Rui Zhao, Jianbing Mu, Zhihui Du, Lei Sun, Liangrui Zhang, Liang Yang, Conglai Zheng, Xiaobing Lin, Haiying Wang, Guangwei He, Xiangcong 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

The CW RF test of 1.3 GHz 9-cell cavity in liquid helium bath at 2 K is a very important key point in the cavity procurement. Some problems can be found through the test, according which to optimized and improve the process of cavity. Recently, Medium temperature (mid-T) furnace bake of 1.3 GHz 9-cell cavities have been carried out at IHEP. Through the proceed of mid-T bake, the quality factor of cavity has been greatly improved. While the excitation of the parasitic modes in the high Q cavities CW cold test has been encountered, which implies an error source for the cavity gradient and quality factor determination. In order to ensure the testing accuracy of superconducting cavity, we have improved the testing system. Finally, the parasitic mode is completely suppressed and the CW RF cold test of high Q cavity is guaranteed. © 2021, CC BY.

关键词： Superfluid helium

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基于催化臭氧氧化去除煤化工废水中污染物——苯系物

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洁净煤技术 2020年第1期26卷 207-212页

作者：彭思伟何绪文白玉勇谷小兵刘海洋大唐环境产业集团股份有限公司北京100097 中国矿业大学(北京)化学与环境工程学院北京100083

苯、甲苯、乙苯和二甲苯(BTEX)是煤化工废水中典型的难降解有机污染物,通常情况下BTEX较难通过传统的化学氧化技术去除。笔者自主制备了多孔臭氧催化剂,并对催化剂进行表征分析;考察了催化臭氧化降解BTEX的最佳反应条件,并对不同反应体... 详细信息

苯、甲苯、乙苯和二甲苯(BTEX)是煤化工废水中典型的难降解有机污染物,通常情况下BTEX较难通过传统的化学氧化技术去除。笔者自主制备了多孔臭氧催化剂,并对催化剂进行表征分析;考察了催化臭氧化降解BTEX的最佳反应条件,并对不同反应体系中自由基的激发情况进行比对;在此基础上探究催化臭氧化对BTEX的去除机理,为BTEX在实际处理过程中的技术应用提供理论基础。XRD分析结果表明,多孔臭氧催化剂含有氧化铝、氧化硅等,且含有沸石结构的化合物。XPS分析结果表明,所合成的催化剂含Si、O、Cu、Fe、Mn、Al等元素。SEM结果表明,催化剂由许多不规则的细小块状粉末构成,且表面非常蓬松,堆叠成多级结构,使催化剂呈多孔性。比表面积分析表明,催化剂的比表面积为20.8 m^2/g,孔隙直径主要集中在3.8 nm。使用该催化剂对BTEX进行催化臭氧化试验,结果表明,反应温度为30℃、溶液pH=8、臭氧投加量为3.5 mg/L、催化剂投加量为5 g/L时,BTEX的降解效果最佳。在该反应体系中有机物去除率为99.1%,其中苯、甲苯、乙苯、二甲苯的去除率分别为95.6%、98.2%、100%、100%。ESR分析结果表明,催化臭氧化反应体系中羟基自由基和超氧自由基的激发强度明显高于臭氧氧化反应体系,这是因为本文制备的催化剂含有Al、Fe、Mn、Cu氧化物,使催化反应过程中负载的金属氧化物价态间相互变化,转移的电子可促进臭氧分子分解,从而产生更多的自由基。催化臭氧化技术是以羟基自由基为主导,超氧自由基、催化剂吸附为辅助,协同实现煤化工废水中典型有机污染物BTEX的高效去除。

关键词：苯系物催化臭氧化煤化工废水自由基典型有机污染物

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High incidence of spontaneous cataracts in aging laboratory rabbits of an inbred strain

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VETERINARY OPHTHALMOLOGY 2015年第3期18卷 186-190页

作者： peng, xuwen Roshwalb, Sara Cooper, Timothy K. Zimmerman, Heather Christensen, Neil D. Penn State Univ Dept Comparat Med Hershey Coll Med Hershey PA 17033 USA Penn State Univ Dept Pathol Hershey Coll Med Hershey PA 17033 USA Penn State Univ Jake Gittlen Canc Res Fdn Hershey Coll Med Hershey PA 17033 USA Penn State Univ Dept Microbiol & Immunol Hershey Coll Med Hershey PA 17033 USA

ObjectiveTo investigate the occurrence of spontaneous cataracts in a breeding colony of the inbred EIII/JC strain of New Zealand White rabbits (Oryctolagus cuniculi) and the congenic strain of EIII/JC-HLA-A2.1transgenic rabbits. ProcedureA retrospective study was conducted by collecting and analyzing data from clinical records for individual rabbits filed between January 2011 and October 2013. ResultsThirteen cases (eight females and five males) of cataract were identified in a group of 51 EIII/JC inbred rabbits with a morbidity of 25.5%. The median age of the rabbits identified with unilateral or bilateral cataracts was 43months in contrast to the median age of 23months of the entire group of 51 rabbits. Additionally, seven cases (five females and two males) of cataracts were identified in a group of 21 EIII/JC-HLA-A2.1 transgenic rabbits. The EIII/JC-HLA-A2.1 transgenic rabbits showed similar morbidity (33.3%) and median age (41months) for the development of cataracts as the EIII/JC rabbits. In both groups, none of the rabbits younger than 37months developed cataracts while 13 (93%) of 14 EIII/JC rabbits aged 37-49months and seven (63.6%) of 11 EIII/JC-HLA-A2.1 transgenic rabbits aged 37-43months developed cataracts. In contrast, none of 78 outbred rabbits with a median age of 26months (10-67months) developed cataracts. ConclusionResults of this study indicate that the occurrence and high incidence of spontaneous cataracts in this inbred strain (EIII/JC) of rabbits were strictly age related and consistently transmitted through inbreeding.

关键词： aging cataracts EIII JC inbred strain high incidence inheritance New Zealand White rabbits

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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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油藏型储气库高效除黑油技术研究与实践

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天然气与石油 2021年第3期39卷 10-17页

作者：刘贤明王铁军贾雪松王林峰丛延刚王绪文寇鹏中国石油北京项目管理公司天津设计院天津300457 大港油田天津储气库分公司天津300270 中国石油吉林油田公司天然气部吉林松原138000

在采气期,油藏型储气库采出的天然气会携带少量黑油进入下游低温装置,导致黑油凝固析出,造成设备、管线堵塞,影响装置安全运行。为解决油藏型储气库采出天然气携带黑油的问题,避免析出黑油影响储气库采气装置的正常运行,经分析研究设置... 详细信息

在采气期,油藏型储气库采出的天然气会携带少量黑油进入下游低温装置,导致黑油凝固析出,造成设备、管线堵塞,影响装置安全运行。为解决油藏型储气库采出天然气携带黑油的问题,避免析出黑油影响储气库采气装置的正常运行,经分析研究设置旋流分离器+过滤分离器两级过滤除黑油流程,从天然气中过滤出99.9%以上直径大于1μm的液滴,减少天然气携带黑油进入后续低温处理装置,提高了冬季调峰、储气库供气的安全性及可靠性。两级过滤除黑油技术在中国首座油藏型储气库中已成功应用,为后续同类型储气库的建设提供了经验借鉴。同时,根据除黑油过滤机理,研发出一体化精细除黑油分离器,此分离器能高效地提高油藏型储气库除黑油的效果,建议将分离器设置在采气装置空冷器后。一体化精细除黑油分离器的设置可为后续同类型储气库设计提供指导。

关键词：油藏型储气库除黑油过滤器选型配置

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Author Correction: The wide utility of rabbits as models of human diseases

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Experimental & molecular medicine 2019年第7期51卷 1页

作者： Pedro J Esteves Joana Abrantes Hanna-Mari Baldauf Lbachir BenMohamed Yuxing Chen Neil Christensen Javier González-Gallego Lorenzo Giacani Jiafen Hu Gilla Kaplan Oliver T Keppler Katherine L Knight Xiang-peng Kong Dennis K Lanning Jacques Le Pendu Ana Lemos de Matos Jia Liu Shuying Liu Ana M Lopes Shan Lu Sheila Lukehart Yukari C Manabe Fabiana Neves Grant McFadden Ruimin Pan xuwen peng Patricia de Sousa-Pereira Ana Pinheiro Masmudur Rahman Natalie Ruvoën-Clouet Selvakumar Subbian Maria Jesús Tuñón Wessel van der Loo Michael Vaine Laura E Via Shixia Wang Rose Mage CIBIO InBIO Research Network in Biodiversity and Evolutionary Biology Universidade do Porto Campus de Vairão Rua Padre Armando Quintas 4485-661 Vairão Portugal. pjesteves@cibio.up.pt. Departamento de Biologia Faculdade de Ciências da Universidade do Porto Rua do Campo Alegre s/n 4169-007 Porto Portugal. pjesteves@cibio.up.pt. Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde (CESPU) Gandra Portugal. pjesteves@cibio.up.pt. CIBIO InBIO Research Network in Biodiversity and Evolutionary Biology Universidade do Porto Campus de Vairão Rua Padre Armando Quintas 4485-661 Vairão Portugal. Max von Pettenkofer Institute and Gene Center Virology National Reference Center for Retroviruses Faculty of Medicine LMU München 81377 Munich Germany. Laboratory of Cellular and Molecular Immunology Gavin Herbert Eye Institute University of California Irvine School of Medicine Irvine CA 92697 USA. Department of Molecular Biology and Biochemistry University of California Irvine School of Medicine Irvine CA 92697 USA. Institute for Immunology University of California Irvine School of Irvine School of Medicine Irvine CA 92697 USA. Department of Medicine University of Massachusetts Medical School Worcester MA 01605 USA. Departments of Pathology Microbiology and Immunology and Comparative Medicine Penn State University Hershey PA USA. Institute of Biomedicine (IBIOMED) and Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd) University of León 24071 León Spain. Departments of Medicine and Global Health University of Washington Seattle USA. Bill and Melinda Gates Foundation Seattle WA USA. Department of Microbiology and Immunology Loyola University Chicago Maywood IL 60153 USA. Department of Biochemistry and Molecular Pharmacology New York University School of Medicine New York NY10016 USA. CRCINA Inserm Université d'Angers Université de Nantes Nantes France. The Biodesign Institute Cente

This article was originally published under a CC BY-NC-SA License, but has now been made available under a CC BY 4.0 License.

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Two New Baccharane Glycosides from Seeds of Impatientis balsamina L. with in vitro Growth Inhibitory Activity in Human Cancer A375 Cells

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Chemical Research in Chinese Universities 2017年第5期33卷 753-757页

作者： WU Oian JIN Yongri YAO Hua LIU Ying LI peng LI xuwen College of Chemistry Jilin University Changchun 130021 P R. China Scientific Research Center China-Japan Union Hospital of Jilin University Changchun 130021 P. R. China

Two new baccharane-type glycosides（1 and 2）, together with seven known baccharane-type glycosides （3u9） hosenkoside A, hosenkoside B, hosenkoside C, hosenkoside F, hosenkoside M, hosenkoside K and hosenko- side G were isolated from the dried seeds of Impatientis balsamina L. The new baccharane-type glycosides were identified as honsenkol A-3-O-β-D-glucopyranosyl-26-O-p-D-glucopyranosyl-28-O-β-D-glucopyranosyl-O-β-D- glucopyranosyl（1） and （3S,4R,17R,20S）17-hydrroxy-3-O-β-D-xylopyranose（12）-β-D-glucopyranosyl-26-O-β-D- glucopyranosyl-28-O-β-D-glucopyranosyl-21,24-epoxybaccharane（2）, respectively, by spectroscopic methods, in- cluding NMR（1D and 2D）, IR and HR-ESI-MS. Compounds 1 and 2 were evaluated for in vitro inhibitory activity against the cell lines. Compound 2 with a new baccharane skeleton had anti-hepatic fibrosis activity against A375 cells in bioassay results, which means the new compounds have potential value in antitumor applications.

关键词： Impatientis balsamina L. Seed Baccharane-type glycoside Cytotoxic activity

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Medium-temperature furnace bake of superconducting radio-frequency cavities at ihep

arXiv

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arXiv 2020年

作者： He, Feisi Pan, Weimin Sha, peng Zhai, Jiyuan Mi, Zhenghui Dai, xuwen Jin, Song Zhang, Zhanjun Dong, Chao Liu, Baiqi Zhao, Hui Ge, Rui Zhao, Jianbing Mu, Zhihui Du, Lei Sun, Liangrui Zhang, Liang Yang, Conglai Zheng, Xiaobing 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

Recently, heat treatment between 250 °C and 500 °C has been attempted to improve quality factor (Q) of superconducting radio-frequency cavities at FNAL and KEK. Experiments of such medium temperature (mid-T) bake with furnaces have also been carried out at IHEP. Firstly, over ten 1.3 GHz 1-cell cavities were treated with different temperatures at a small furnace, which all demonstrated improvement of Q and anti-Q-slope phenomenon. The average quality factor has reached 3.6×1010 when the gradient is 16 MV/m，while the highest Q is 4.9×1010@16MV/m;the maximum gradients of these 1-cell cavities are between 25.1 and 36.9 MV/m. Then, the recipe of mid-T furnace bake at 300 °C for 3 hours has been applied to six 1.3 GHz 9-cell cavities at a new big furnace, which have all shown higher Q and anti-Q-slope at medium field (16~24 MV/m). The average quality factor has reached 3.8×1010 when the gradient is 16 MV/m. The maximum gradients of the 9-cell cavities are between 22.7 and 26.5 MV/m. © 2020, CC0.

关键词： Radio waves

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番茄SlMAPK6基因克隆及其表达特性分析

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南方农业学报 2020年第7期51卷 1625-1633页

作者：岳宁波李云洲李玉龙潘鹏程潘寅涛王勇须文吴浪闫见敏贵州大学农学院贵阳550025 西北农林科技大学资源与环境学院陕西杨凌712100 中国农业大学园艺学院北京100083

【目的】克隆番茄促分裂原活化蛋白激酶(MAPK)基因SlMAPK6,并分析其在不同非生物胁迫及信号物质处理下的表达模式,为深入探究SlMAPK6基因在番茄逆境响应中调控机制提供理论参考。【方法】采用同源克隆技术从矮番茄中克隆SlMAPK6基因cDN... 详细信息

【目的】克隆番茄促分裂原活化蛋白激酶(MAPK)基因SlMAPK6,并分析其在不同非生物胁迫及信号物质处理下的表达模式,为深入探究SlMAPK6基因在番茄逆境响应中调控机制提供理论参考。【方法】采用同源克隆技术从矮番茄中克隆SlMAPK6基因cDNA全长序列,并进行生物信息学分析,采用实时荧光定量PCR检测矮番茄幼苗在干旱(20%PEG-6000)、盐(300 mmol/L NaCl)及信号物质[0.50 mmol/L水杨酸(SA)和0.10 mmol/L 2,1,3-苯并噻二唑(BTH)]处理下SlMAPK6基因的表达模式。【结果】克隆获得SlMAPK6基因cDNA全长序列为1360 bp,开放阅读框(ORF)为1131 bp,编码376个氨基酸残基,其编码蛋白理论等电点(pI)6.76,不稳定指数44.36,脂肪系数90.00,为不稳定的强脂溶性蛋白,亲水性平均值(GRAVY)-0.396,亲水性氨基酸均匀分布在整个肽链中,故该蛋白为亲水性蛋白;亚细胞定位于细胞核及胞浆质中,无跨膜区,含有36个磷酸化位点,其中丝氨酸(Ser)磷酸位点19个、苏氨酸(Thr)磷酸位点9个。SlMAPK6蛋白二级结构中,α-螺旋占38.03%,延伸链占10.37%,无规则卷曲占51.60%。SlMAPK6蛋白与马铃薯StMAPK4、风铃辣椒CbMAPK4和中华辣椒CcMAPK4蛋白同源性均为99.47%。SlMAPK6和SlMAPK5蛋白的亲缘关系最近,与拟南芥MAPK家族B亚族成员AtMAPK4、AtMPK5、AtMPK11、AtMPK12和AtMPK13蛋白的亲缘关系也较近。经SA、BTH、NaCl和PEG-6000处理后,SlMAPK6基因均出现抑制表达,说明SlMAPK6基因负向调控番茄植株的逆境响应。【结论】SlMAPK6基因可能参与负调控番茄植株的抗病和抗逆胁迫机制。SlMAPK6蛋白通过Ser或Thr磷酸化识别细胞信号的传导功能,在矮番茄逆境胁迫响应中发挥重要作用。

关键词：番茄促分裂原活化蛋白激酶6(MAPK6) 基因克隆信号物质非生物胁迫表达特性

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Improved Local Maximal Occurrence Feature Representation for Person Re-Identification

Improved Local Maximal Occurrence Feature Representation for...

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IEEE International Conference on Software Engineering and Service Sciences (ICSESS)

作者： Yuanxin Zhu Zhao Yang xuwen Yao Sai Zhao Shaohu peng School of Mechanical and Electric Engineering Guangzhou University Guangzhou Guangdong P.R. China

ISBN: (纸本)9781538665664;9781538665657

Person re-identification is a technique to automatically search the same people in different camera views. It is a challenging task because of the huge variations caused by different illuminations and views in images. There is an effective method tackling the problem, which learns a useful feature representation for the pedestrian images. In recent research, a feature representation named Local Maximal Occurrence (LOMO)achieves outstanding performance, but LOMO has a disadvantage that its robustness to illumination is not excellent. In this paper, we propose an improved LOMO representation to further reduce the impact of light. The improved LOMO feature combines Color Name feature with LOMO, because Color Name feature has strong robustness to illumination. However, Color Narne feature has the weakness that it loses graphical details. Therefore, the feature is unsuitable for traditional pooling method. To overcome the disadvantage, a specific pooling method called global Gaussian pooling for Color Name feature is designed, which is based on Gaussian distribution and can weigh the different regions of an image. The important regions gain more attention in matching images. The experimental results on two public available datasets demonstrate the effectiveness of our proposed approach.

关键词： Image color analysis Lighting Histograms Feature extraction Measurement Gaussian distribution Training

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