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Two annular CsI(Tl) detector arrays for the charged particle telescopes

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Nuclear Science and Techniques 2023年第10期34卷 158-165页

作者： Hong-Yu Zhu Jian-Ling Lou Yan-Lin Ye Li-Sheng Yang Bo-Long xia Kang Wei Ying Chen Wei-Liang Pu Zi-Yao Hu Hao-Yu Ge Jia-Hao Chen Kai Ma Wen-Wu Wan Hooi-Jin ong Yan-Yun Yang Shi-Wei xu Kang Wang Fang-Fang Duan Jun-Bin Ma Zhen Bai Peng Ma Ruo-Fu Chen School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China Institute of Modern Physics Chinese Academy SciencesLanzhou 730000China

In this study,we constructed two annular detector arrays comprising 24 wedge-shaped CsI(Tl) crystals,and tested them using anαsource and radioactive beams of ^(14-16) Con a CD_2 *** compared the properties of a CsI(Tl) crystal encapsulated with various reflectors,revealing that using the 80-μm-thick eSR film to pack the CsI(Tl) crystal yielded the largest light output with the smallest non-uniformity in light output (ΔLO).For the 24 CsI(Tl) detectors with the 80-μm-thick eSR films,the average energy resolution improved as the average light output increased;however,it deteriorated as theΔLO value *** form two annular Si-CsI(Tl) telescopes for identifying the light-charged particles,theΔLO value and energy resolution of each CsI(Tl) detector were maintained under 20%and 7.7%,*** telescopes were tested for the first time in a direct nuclear reaction ex.eriment using ^(14-16) C+*** results demonstrated that the Z=1 and Z=2 charged particles were adequately discriminated by the telescopes using the standardΔe-e method.

关键词： Wedge-shaped CsI(Tl)detector Light output non-uniformity Si-CsI(Tl)telescope Particle identification

Recent advances and applications of deep learning methods in materials science

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npj Computational Materials 2022年第1期8卷 548-573页

作者： Kamal Choudhary Brian DeCost Chi Chen Anubhav Jain Francesca Tavazza Ryan Cohn Cheol Woo Park Alok Choudhary Ankit Agrawal Simon J.L.Billinge elizabeth Holm Shyue Ping ong Chris Wolverton Materials Science and engineering Division National Institute of Standards and TechnologyGaithersburgMD20899USA Theiss Research La JollaCA92037USA DeepMaterials LLC Silver SpringMD20906USA Material Measurement Science Division National Institute of Standards and TechnologyGaithersburgMD20899USA Department of Nanoengineering University of California San DiegoSan DiegoCA92093USA energy Technologies Area Lawrence Berkeley National LaboratoryBerkeleyCAUSA Department of Materials Science and engineering Carnegie Mellon UniversityPittsburghPA15213USA Department of Materials Science and engineering Northwestern UniversityEvanstonIL60208USA Department of electrical and Computer engineering Northwestern UniversityEvanstonIL60208USA Department of Applied Physics and Applied Mathematics and the Data Science Institute Fu Foundation School of Engineering and Applied SciencesColumbia UniversityNew YorkNY10027USA

Deep learning(DL)is one of the fastest-growing topics in materials data science,with rapidly emerging applications spanning atomistic,image-based,spectral,and textual data *** allows analysis of unstructured data and automated identification of *** recent development of large materials databases has fueled the application of DL methods in atomistic prediction in *** contrast,advances in image and spectral data have largely leveraged synthetic data enabled by high-quality forward models as well as by generative unsupervised DL *** this article,we present a high-level overview of deep learning methods followed by a detailed discussion of recent developments of deep learning in atomistic simulation,materials imaging,spectral analysis,and natural language *** each modality we discuss applications involving both theoretical and ex.erimental data,typical modeling approaches with their strengths and limitations,and relevant publicly available software and *** conclude the review with a discussion of recent cross-cutting work related to uncertainty quantification in this field and a brief perspective on limitations,challenges,and potential growth areas for DL methods in materials science.

关键词： learning limitations textual

基于有效期望质量度量的图像混合丢包保护方法

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西安电子科技大学学报 2006年第5期33卷 696-699,744页

作者：杨亚东吴成柯肖嵩杜建超西安电子科技大学综合业务网理论与关键技术国家重点实验室

针对现有基于交织器结构的不等丢包保护方案通常以端到端期望质量度量系统性能,而没有考虑最小质量要求的问题,提出了以有效期望质量度量系统性能的新判据.有效期望质量定义为扣除传输失败情况后接收端得到的期望质量.基于此新判据,提... 详细信息

针对现有基于交织器结构的不等丢包保护方案通常以端到端期望质量度量系统性能,而没有考虑最小质量要求的问题,提出了以有效期望质量度量系统性能的新判据.有效期望质量定义为扣除传输失败情况后接收端得到的期望质量.基于此新判据,提出了一种双向局部搜索的信源/信道码率分配算法.采用双状态马尔可夫网络模型,通过对SPIHT和JPeG2000编码器产生的码流数据进行仿真实验,结果表明,新算法与基于端到端期望质量度量的原算法相比能显著提高有效期望质量,降低传输失败事件发生的概率,同时计算复杂度也明显减小.

关键词：图像传输联合信源/信道编码不等保护 QoS JPeG2000

Modular micro-PCR system for the onsite rapid diagnosis of COVID-19

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Microsystems & Nanoengineering 2022年第4期8卷 125-136页

作者： Phuong Quoc Mai Nguyen Ming Wang Nelisha Ann Maria Adelicia Yongling Li Hsih Yin Tan Gordon Minru x.ong Meng-Kwang Marcus Tan Ali Asgar S.Bhagat Catherine W.M.ong Chwee Teck Lim Institute for Health Innovation and Technology(iHealthtech) National University of SingaporeMD614 Medical Drive#14-01Singapore 117599Singapore Department of Biomedical engineering National University of Singapore4 Engineering Drive 3Block 4#04-08Singapore 117583Singapore Advanced MedTech 2 Venture Drive#23-18 Vision ExchangeSingapore 608526Singapore Infectious Diseases Translational Research Programme Department of MedicineYong Loo Lin School of MedicineNational University of SingaporeNUHS Tower Block1E Kent Ridge Road Level 11Singapore 119228Singapore

effective containment of the COVID-19 pandemic requires rapid and accurate detection of the *** chain reaction(PCR)remains the gold standard for COVID-19 *** this article,we report the performance of a cost-effective modular microfluidic reverse transcription(RT)-PCR and RT-loop mediated isothermal amplification(RTLAMP)platform,epidax®,for the point-of-care testing and confirmation of *** platform is versatile and can be reconfigured either for screening using endpoint RT-PCR or RT-LAMP tests or for confirmatory tests using realtime ***®is highly sensitive and detects as little as 1 RNA copy perµL for real-time and endpoint RT-PCR,while using only half of the *** achieved comparable results with those of a commercial platform when detecting SARS-CoV-2 viruses from 81 clinical RNA ***®can also detect SARS-CoV-2 from 44 nasopharyngeal samples without RNA extraction by using a direct RT-PCR assay,which shortens the sample-to-answer time to an hour with minimal user ***,we validated the technology using an RT-LAMP assay on 54 clinical RNA ***,our platform provides a sensitive,cost-effective,and accurate diagnostic solution for lowresource settings.

关键词： fir confirmation diagnosis

The acceleration of a high-charge electron bunch to 10 GeV in a 10-cm nanoparticle-assisted wakefield accelerator

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Matter and Radiation at extremes 2024年第1期9卷 15-24页

作者： Constantin Aniculaesei Thanh Ha Samuel Yoffe Lance Labun Stephen Milton edward McCary Michael M.Spinks Hernan J.Quevedo Ou Z.Labun Ritwik Sain Andrea Hannasch Rafal Zgadzaj Isabella Pagano Jose A.Franco-Altamirano Martin L.Ringuette erhart Gaul Scott V.Luedtke Ganesh Tiwari Bernhard ersfeld enrico Brunetti Hartmut Ruhl Todd Ditmire Sandra Bruce Michael e.Donovan Michael C.Downer Dino A.Jaroszynski Bjorn Manuel Hegelich University of Texas at Austin AustinTexas 78712USA SUPA Department of Physics University of StrathclydeGlasgowScotland G4 ONGUnited Kingdom Tau Systems Inc.AustinTexas 78701USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA Los Alamos National Laboratory Los AlamosNew Mexico 87545USA Brookhaven National Laboratory UptonNew York 11973USA Ludwig-Maximilians-Universität MunichGermany

An intense laser pulse focused onto a plasma can excite nonlinear plasma *** appropriate conditions,electrons from the background plasma are trapped in the plasma wave and accelerated to ultra-relativistic *** scheme is called a laser wakefield *** this work,we present results from a laser wakefield acceleration ex.eriment using a petawatt-class laser to excite the wakefields as well as nanoparticles to assist the injection of electrons into the accelerating phase of the *** find that a 10-cm-long,nanoparticle-assisted laser wakefield accelerator can generate 340 pC,10±1.86 GeV electron bunches with a 3.4 GeV rms convolved energy spread and a 0.9 mrad rms *** can also produce bunches with lower energies in the 4–6 GeV range.

关键词： acceleration nanoparticle charge

Comparing lignocaine-adrenaline-tetracaine gel with lignocaine infiltration for anesthesia during repair of lacerations:A randomized trial

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World Journal of emergency Medicine 2013年第4期4卷 281-284页

作者： Jean MH Lee Nina Laxmikantha Marcus e H ong evelyn Wong Jeremy CP Wee Department of emergency Medicine Singapore General Hospital169608 Singapore

BACKGROUND:This study aimed to compare the topical anesthetic lignocaine,adrenaline,and tetracaine(LAT)(4%lignocaine,1:2 000 adrenaline,1%tetracaine) with the conventional lignocaine infiltration(LI) for repair of minor lacerations,for the comfort of anesthetic administration,efficacy,adverse effects and ***:This was a prospective randomized clinical *** Asian patients who required toilet and suture for minor lacerations in the emergency department of the Singapore General Hospital over a 4-month *** patients were assigned randomly to 2 arms of *** first was the LAT gel group who had LAT gel applied to the laceration prior to *** second was the control group in whom the anesthetic administered was lignocaine infiltration(LI) via a *** pain of the process of administering anesthetic and efficacy of anesthesia were scored using the visual pain scale included *** efficacy of LAT *** infiltration as an anesthetic prior to the toilet and suture of minor lacerations and complications of ***:Twenty patients were randomized to LAT gel and 16 to LI on an intention to treat *** mean pain score by patients in the LAT gel group was 2.5(0.52 Se),and 2.5(0.58 Se)in the LI *** pain score for pain during application of the anesthetic was 1.5(0.40) in the LAT gel group,and 3.5(0.46) in the LI *** was no difference in complications between the LAT and LI ***:LAT gel prior to the toilet and suture of minor lacerations is proven to be as efficacious as LI in terms of patient comfort and effectiveness of *** complications are also comparable to those treated with LI.

关键词： Lignocaine infiltration Lacerations emergency department Pain score

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固液的超声分离

过滤与分离 1999年第3期9卷 19-21页

作者：石秀东无锡轻工大学机械系江苏无锡214036

本文分析固液超声分离的原理，分析了两个平面声波在液体中如何产生移动驻波，依赖此移动特点把固体粒子移动到装置的一侧，然后分流，从而得到固液分离的目的。进一步分析了超声分离对所用超声换能器的频率、声强的要求。

关键词：固液分离超声波声强频率

多体素氢质子磁共振波谱与胶质瘤病理指标的相关性分析

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中国临床医学 2018年第3期25卷 363-367页

作者：沈晓王尔松复旦大学附属金山医院神经外科上海201508

目的:探讨多体素氢质子磁共振波谱(proton magnetic resonance spectroscopy,~1H-MRS)参数与胶质瘤细胞密度、CD34及MIB-1标记指数的关系。方法:术前对18例胶质瘤患者进行多体素~1H-MRS及常规磁共振扫描。在神经导航下根据~1H-MRS和常规... 详细信息

目的:探讨多体素氢质子磁共振波谱(proton magnetic resonance spectroscopy,~1H-MRS)参数与胶质瘤细胞密度、CD34及MIB-1标记指数的关系。方法:术前对18例胶质瘤患者进行多体素~1H-MRS及常规磁共振扫描。在神经导航下根据~1H-MRS和常规MRI行组织穿刺活检。所有标本进行苏木精-伊红(H-e)和免疫组织化学染色,将~1H-MRS参数Cho/NAA、NAA/Cr、Cho/Cr比值与胶质瘤细胞密度、CD34及MIB-1指数进行Pearson相关性分析。结果:18例患者获取穿刺病理标本89份。Cho/NAA比值与细胞密度、CD34及MIB-1指数均正相关;NAA/Cr比值与细胞密度、CD34及MIB-1指数负相关。Cho/Cr比值与细胞密度正相关,与CD34及MIB-1指数间无相关性。结论:~1H-MRS参数与胶质瘤细胞密度、CD34及MIB-1标记指数高度相关,可为临床诊治及疗效评估提供参考。

关键词：胶质瘤磁共振波谱病理活检

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“撒切尔主义”对英国教育改革的影响

外国教育研究 2003年第2期30卷 13-16页

作者：易红郡赵红亚北京师范大学教育学院北京100875

“撒切尔主义”是撒切尔夫人上台后在保守党内出现的一种占统治地位的意识形态。在“撒切尔主义”基本理念的指导下,英国政府在教育领域进行了一系列的改革,如实行全国统一课程、鼓励学校自治、推动教育的私有化等。这些改革对英国教育... 详细信息

“撒切尔主义”是撒切尔夫人上台后在保守党内出现的一种占统治地位的意识形态。在“撒切尔主义”基本理念的指导下,英国政府在教育领域进行了一系列的改革,如实行全国统一课程、鼓励学校自治、推动教育的私有化等。这些改革对英国教育产生了十分深远的影响。

关键词： “撒切尔主义” 英国教育改革教育私有化教育管理课程管理