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Themagnetic field measurement system for HEPS-TF superconducting wiggler

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Radiation Detection Technology and Methods 2022年第1期6卷 129-135页

作者： Wan Chen ZhiQiang Li Zhuo Zhang xiangchen yang FuSan Chen XianJing Sun Huihua Lu Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Key Laboratory of Particle Acceleration Physics and Technology Chinese Academy of SciencesBeijing 100049China

Background High Energy Photon Source(HEPS)is the fourth-generation synchrotron radiation source to be established in *** is a high-performance and high-energy synchrotron radiation light source with a beam energy of 6 GeV and an ultra-low emittance of better than 0.06 nm×rad(http://***/heps/***).Superconducting 3W1 wiggler magnet is one of the insertion devices in High Energy Photon Source Test Facility project(HEPS-TF).And it is also the key component to obtain higher brightness in high photon energy *** In the development process of superconducting wiggler,in order to ensure the magnetic field quality of each processing,it is necessary to monitor the magnetic field performance of before and after the full length bare magnet installed with ***,different magnetic field measuring devices are being developed for different develop *** The magnetic field performance of the full length bare magnet should be tested in vertical at low *** the magnetic structure is installed in the horizontal cryostat,the horizontal test is carried *** view of these two processes,the vertical magnetic field measurement system and the horizontal magnetic field measurement system have been developed,*** The magnetic performances of the full length bare magnet and assembled with the horizontal cryostat were measured by the vertical and horizontal magnetic field measurement *** first and second field integrals are corrected to better than the Physical requirements according to the magnetic field measurement *** magnetic field performances are described in this *** After more than a year operation of 3W1-SCW on the BII line station,the characteristic energy and photon flux of synchrotron radiation have been greatly improved,and the performance is *** indicates that the measurement results of the magnetic field measurement system are reliable and credible.

关键词： Hall probe Stretch wire Magnetic field measurement Vertical test Superconducting wiggler

Study on the technology of 3W1 superconducting magnet

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Radiation Detection Technology and Methods 2022年第1期6卷 97-101页

作者： xiangchen yang Fusan Chen Xianjing Sun Xiaojuan Bian Wan Chen Huihua Lu Zhiqiang Li Institute of High Energy Physics Chinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences HuairouChina

Introduction The superconducting wiggler magnet named as 3W1 is the key device for the test facility for the High Energy Photon Source(HEPS).The magnet structure is 1430 mm long with a gap of 68 mm,and the designed peak field is 2.6 *** main magnet part is comprised by 28 main coils and 4 correction coils at both *** to the large gap and high field,the manufacturing process is extremely *** During R&D,the problems of coil winding,impregnation,pre-stress evaluation and quench risk control were solved by optimizing the *** coils were divided into groups to complete the cryogenic test,and the qualified coils were selected to complete the assembly of the *** The bare magnet has been tested with liquid helium bath in April 2018 in IHEP,and the loading current reached up to 345 A resulting in the expected 2.61 *** this paper,the technology about the coil winding,impregnation,assembling and test is presented in detail.

关键词： 3W1 Superconducting Magnet

An acoustofluidic device for the automated separation of platelet-reduced plasma from whole blood

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Microsystems & Nanoengineering 2024年第3期10卷 293-303页

作者： Zhehan Ma Jianping Xia Neil Upreti Emeraghi David Joseph Rufo Yuyang Gu Kaichun yang Shujie yang xiangchen Xu Jean Kwun Eileen Chambers Tony Jun Huang Thomas Lord Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNCUSA Department of Biomedical Engineering Duke UniversityDurhamNCUSA Department of Pediatrics Duke UniversityDurhamNCUSA Duke Transplant Center Department of SurgeryDuke University School of MedicineDurhamNCUSA

Separating plasma from whole blood is an important sample processing technique required for fundamental biomedical research,medical diagnostics,and therapeutic *** protocols for plasma isolation require multiple centrifugation steps or multiunit microfluidic processing to sequentially remove large red blood cells(RBCs)and white blood cells(WBCs),followed by the removal of small ***,we present an acoustofluidic platform capable of efficiently removing RBCs,WBCs,and platelets from whole blood in a single *** leveraging differences in the acoustic impedances of fluids,our device generates significantly greater forces on suspended particles than conventional microfluidic approaches,enabling the removal of both large blood cells and smaller platelets in a single *** a result,undiluted human whole blood can be processed by our device to remove both blood cells and platelets(>90%)at low voltages(25 Vpp).The ability to successfully remove blood cells and platelets from plasma without altering the properties of the proteins and antibodies present creates numerous potential applications for our platform in biomedical research,as well as plasma-based diagnostics and ***,the microfluidic nature of our device offers advantages such as portability,cost efficiency,and the ability to process small-volume samples.

关键词： remove separation removing

Individualized Traditional Chinese Medicine treatment vs antibiotics for recurrent urinary tract infections: a multicenter, randomized controlled study

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Journal of Traditional Chinese Medicine 2024年第3期44卷 524-529页

作者： GU xiangchen QIU Meisi XIE Lin CHEN Min DENG Yueyi ZHANG Changming JIAN Guihua WANG Chen WANG Yi Department of Nephrology Yueyang Hospital of Integrated Traditional Chinese and Western Medicine Affiliated to Shanghai University of Traditional Chinese Medicine Department of Nephrology Rizhao Hospital of Traditional Chinese Medicine Department of Nephrology Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine Department of Nephrology Shanghai Municipal Traditional Chinese Medicine Hospital Affiliated to Shanghai University of Traditional Chinese Medicine Department of Nephrology the Sixth People's Hospital Affiliated Shanghai Jiaotong University Department of Nephrology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine

OBJECTIVE: To systematically assess the effects of individualized Chinese medicines on recurrent urinary tract infections(rUTIs).METHODS: This study recruited 230 adult female patients in the remission phase of rUTIs from five hospitals in China. The patients were randomly allocated to two groups: an individualized Chinese medicine group(n = 114) and a control group(n = 116). Patients in the Chinese medicine group received individualized Chinese herbs, which were evaluated for syndrome *** in the control group received antibiotic treatment combined with a Chinese medicine placebo. The duration of treatment was three courses of four weeks each, with a three-month subsequent follow-up. UTI recurrence rate,Traditional Chinese Medicine(TCM) syndrome scores,36-item Short Form Survey(SF-36) score, and urine secretory immunoglobulin A(SIgA) were measured and analyzed before and after treatment in each group. RESULTS: Patients from the Chinese medicine group exhibited significant decreases in both short-and longterm UTI recurrence rates compared with the control group(P < 0.05). The changes in TCM syndrome scores between the Chinese medicine and control groups were significant(P < 0.05). The changes in the average SF-36 quality-of-life scores in the Chinese medicine group were also significantly higher than those in the control group after treatment(P < 0.05). The Chinese medicine group also demonstrated a significant increase in urine SIg A expression. CONCLUSION: Taken together, compared to the oftenused long-term antimicrobial prophylaxis during the remission stage of r UTIs, treating patients with an individualized Chinese medicine decoction by syndrome differentiation could effectively reduce the recurrence rate, improve the patients' TCM syndrome scores and quality of life, and enhance immunity, which in turn helps to prevent antibiotic resistance.

关键词： immunoglobulin A, secretory medicine, Chinese traditional quality of life randomized controlled trial syndrome differentiation urinary tract infections

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磁通法在强磁场混合型永久磁铁中应用研究

中国稀土学报 2015年第5期33卷 550-555页

作者：赵国生彭全岭杨向臣郑州大学电气工程学院河南郑州450001 中国科学院高能物理研究所北京100049

介绍了利用磁通法进行混合型永久磁铁的设计方法,相比传统的利用磁路的设计方法要精确了很多。结合加速器磁铁的设计原理,利用辐向磁化以及轴向永磁体和高磁导率铁钴钒极头对磁场的收拢作用,设计和制造出场强高于2.4 T的混合型永久磁铁... 详细信息

介绍了利用磁通法进行混合型永久磁铁的设计方法,相比传统的利用磁路的设计方法要精确了很多。结合加速器磁铁的设计原理,利用辐向磁化以及轴向永磁体和高磁导率铁钴钒极头对磁场的收拢作用,设计和制造出场强高于2.4 T的混合型永久磁铁。借助二维及三维磁场设计程序的计算和优化,可以设计制造出场强高且均匀度更好的永久磁铁。利用永久磁铁所产生的强磁场,可使磁铁的制造运行费用低,它们在加速器磁铁、材料科学研究、永磁电机、核磁共振成像技术中具有广阔的应用前景。

关键词：混合型永久磁铁直接磁通间接磁通

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页岩水化微观作用力定量表征及工程应用

石油勘探与开发 2017年第2期44卷 301-308页

作者：康毅力杨斌李相臣杨建游利军陈强油气藏地质及开发工程国家重点实验室西南石油大学成都610500 中国石油西南油气田公司工程技术研究院四川广汉618300

以四川盆地志留系龙马溪组和鄂尔多斯盆地三叠系延长组页岩为研究对象,从微观作用力的角度分析页岩水化机理,进行水合力的定量表征,并开展矿场应用。选取了与伊利石组成和性质都极为相似的白云母进行微观作用力测试。结果显示云母片在... 详细信息

以四川盆地志留系龙马溪组和鄂尔多斯盆地三叠系延长组页岩为研究对象,从微观作用力的角度分析页岩水化机理,进行水合力的定量表征,并开展矿场应用。选取了与伊利石组成和性质都极为相似的白云母进行微观作用力测试。结果显示云母片在电解质溶液中的微观作用力主要包括DLVO(Derjaguin-Landau-Verwey-Overbeek)力和水合力。当电解质浓度较低时,测试曲线符合DLVO理论;但当电解质浓度大于临界值且云母片间距小于5 nm左右时,测试曲线完全偏离DLVO理论曲线,水合力开始占据主导作用。定量计算表明水合力强度随作用距离增加呈双指数型衰减。矿场应用表明,严格控制水相侵入并降低水合力强度是防塌钻井液体系设计的关键;压后焖井过程中充分利用页岩水化致微裂缝萌生、扩展可进一步改造页岩储集层。

关键词：页岩水化作用水合力伊利石井壁失稳焖井

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ADS注入器I超导短磁铁研制及测试

核技术 2015年第9期38卷 13-17页

作者：彭全岭赖嵘杨向臣徐风雨中国科学院高能物理研究所北京100049 哈尔滨工业大学哈尔滨150006

加速器驱动次临界系统(Accelerator Driven Sub-critical System,ADS)注入器I超导磁铁经过2012年模型磁铁(300 mm长磁铁)阶段后,因加速器物理设计需要,磁铁机械长度缩短到170 mm,截至到2014年共经过了三种结构类型的超导磁铁的研制。201... 详细信息

加速器驱动次临界系统(Accelerator Driven Sub-critical System,ADS)注入器I超导磁铁经过2012年模型磁铁(300 mm长磁铁)阶段后,因加速器物理设计需要,磁铁机械长度缩短到170 mm,截至到2014年共经过了三种结构类型的超导磁铁的研制。2014年7月在哈尔滨工业大学进行短磁铁的低温垂直测试,磁铁的各项性能指标都满足了设计要求,同时也验证了失超探测和磁场测量设备的可靠性。本文主要介绍170 mm长短磁铁的物理及结构、电流引线、失超保护以及超导磁铁裸磁铁的低温垂直测试情况。目前有两块超导短磁铁,两个超导腔已装入到测试恒温器中,并实现了2.1 K下的低温运行,超导磁铁的运行平稳,电流引线常温端也无结霜现象。

关键词：螺线管失超探测垂直测试持续电流效应

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何以归家:现代性的救赎

学术月刊 2024年第3期56卷 20-36页

作者：孙向晨复旦大学哲学学院上海200433

“家”是一个牵动复杂情感的词。作为哲学研究,我们需要将对“家”的日常意识、历史机制、社科研究都悬置起来,澄清作为哲学概念的“家”,揭示“家”作为人类生存论结构的基本特征。现代性建基在“离家”的逻辑上,个体作为主体的优先地... 详细信息

“家”是一个牵动复杂情感的词。作为哲学研究,我们需要将对“家”的日常意识、历史机制、社科研究都悬置起来,澄清作为哲学概念的“家”,揭示“家”作为人类生存论结构的基本特征。现代性建基在“离家”的逻辑上,个体作为主体的优先地位发端于新教神学,深化于近代哲学,但个体-主体的深层次危机却催生了现代虚无主义。基于汉语世界对于救赎的解读路径,对于现代性的救赎给出了源于汉语世界的方案,“归家”成为这种复归式救赎的方向。在这一视域的指引下,现代西方哲学同样显露出一条基于“家”的拯救路径。最终,我们要基于“家本体论”揭示出人类生存的“温暖”面向。

关键词：哲学概念的家离家虚无复归家哲学温暖世界

基于孪生Inception网络的燃烧器火焰状态监测

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化工进展 2024年第2期43卷 760-767页

作者：马赟付伟王昕杨如意钱相臣华北电力大学控制与计算机工程学院北京102206 国家能源集团新能源技术研究有限公司北京102211 国电内蒙古东胜热电有限公司内蒙古鄂尔多斯017000

燃煤电厂炉膛火焰的实时监测关系到发电经济性和锅炉的安全运行,而基于光能、热能和辐射能等能量信号的传统火检技术仅能探测火焰的有无,已无法满足日益迫切的火力发电精细化“调峰”需求。本文以实际电厂燃烧器火焰图像为研究对象,应... 详细信息

燃煤电厂炉膛火焰的实时监测关系到发电经济性和锅炉的安全运行,而基于光能、热能和辐射能等能量信号的传统火检技术仅能探测火焰的有无,已无法满足日益迫切的火力发电精细化“调峰”需求。本文以实际电厂燃烧器火焰图像为研究对象,应用基于改进的Inception深度卷积神经网络(deep convolutional neural network,DCNN)的火焰状态分类方法,通过深入分析燃烧器火焰图像特点,对火焰多维度特征进行提取并制作数据集,同时将预处理后的不同类别火焰图像制作成火焰图像数据集,构建Inception DCNN,实现自动特征提取的火焰状态分类,并提出基于孪生Inception DCNN对燃烧器火焰状态进行分类。结果表明,改进的孪生Inception DCNN网络模型将火焰的状态分类问题转化为评价状态相似度问题,间接实现分类目标,识别准确率达到99.86%。

关键词：燃烧器火焰状态监测燃煤电厂 Inception深度卷积神经网络孪生网络

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