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Derivative Spectroscopy and its Application at Detecting the Weak Emission/Absorption lines

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Research in Astronomy and Astrophysics 2024年第3期24卷 205-223页

作者： lihuan Yu Jiangdan li Jinliang Wang Jiajia li Jiao li Qiang Xi zhanwen Han Yunnan Observatories Chinese Academy of Sciences(CAS)Kunming 650011China Key Lab of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China

The development of spectroscopic survey telescopes like Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST),Apache Point Observatory Galactic Evolution Experiment and Sloan Digital Sky Survey has opened up unprecedented opportunities for stellar *** types of stars,such as early-type emission-line stars and those with stellar winds,can be distinguished by the profiles of their spectral *** this paper,we introduce a method based on derivative spectroscopy(DS)designed to detect signals within complex backgrounds and provide a preliminary estimation of curve *** method exhibits a unique advantage in identifying weak signals and unusual spectral line profiles when compared to other popular line detection *** validated our approach using synthesis spectra,demonstrating that DS can detect emission signals three times fainter than Gaussian ***,we applied our method to 579,680 co-added spectra from LAMOST Medium-Resolution Spectroscopic Survey,identifying 16,629 spectra with emission peaks around the Hαline from 10,963 *** spectra were classified into three distinct morphological groups,resulting in nine subclasses as follows.(1)Emission peak above the pseudo-continuum line(single peak,double peaks,emission peak situated within an absorption line,P Cygni profile,Inverse P Cygni profile);(2)Emission peak below the pseudo-continuum line(sharp emission peak,double absorption peaks,emission peak shifted to one side of the absorption line);(3)Emission peak between the pseudo-continuum line.

关键词： line identification-line profiles-methods data analysis-techniques spectroscopic-techniques radial velocities

Acupuncture-induced oxygen therapy inhibits oxyradical injury and improves microcirculation following brain injury

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Neural Regeneration Research 2010年第6期5卷 439-444页

作者： Huafeng Yang zhanwen li Guojun Shi Xuanlei Ren Ximin Yang Department of Neurosurgery Ningbo Women and Children's Hospital Ningbo 315012 Zhejiang Province China College of Traditional Chinese Medicine Southern Medical University Guangzhou 510515 Guangdong Province China Department of Hepatobiliary Surgery Nanfang HospitalSouthern Medical UniversityGuangzhou 510515 Guangdong Province China Laboratory Center Third Hospital of Chinese PLA Baoji 721004 Shaanxi Province China

BACKGROUND： Acupuncture-induced oxygen therapy combines acupoint theory in traditional Chinese medicine and modern oxygen therapy. Clinical studies have shown that acupuncture-induced oxygen therapy results in favorable outcomes for brain injury. However, the mechanisms of action remain poorly understood. OBJECTIVE： To determine pathological changes and malondialdehyde （MDA） content, superoxide dismutase （SOD） and nitric oxide synthase （NOS） activity, as well as hemorheological brain alterations following acupuncture-induced oxygen therapy, and to explore possible mechanisms of acupuncture-induced oxygen therapy on brain injury. DESIGN, TIME AND SETTING： A randomized, controlled, animal experiment was performed at the Animal Experimental Center of Xi＇an Medical University from January 2006 to April 2009. MATERIALS： An oxygen delivery device, through the use of acupuncture （oxygen delivery machine ＋ silver hollowed needle, 0.5 mm inner diameter）, was purchased from Research Center ol Machine, Shaanxi University of Science and Technology in China. METHODS： A total of 180 Sprague Dawley rats were randomly assigned to six groups （n = 30）： normal, sham-surgery （dura mater exposure）, model （brain injury induced by free-falling of heavy object to head）, Xiantaimixture （0.417 mL/100 g following brain injury）, electroacupuncture [acupuncture at Baihui （DU 20）, Housanfi （ST 36）, Yanglingquan （GB 34）, and Sanyinjiao （SP 6） following brain injury], and acupuncture-induced oxygen therapy （oxygen delivery through hollowed needle to Baihui （DU 20）, Housanfi （ST 36）, Yanglingquan （GB 34）, and Sanyinjiao （SP 6） following brain injury, 0.01 mL/minute）. Group intervention was performed once a day for 14 consecutive days. MAIN OUTCOME MEASURES： Pathological changes, MDA content, SOD and NOS activity, and hemorheological alterations in the brain. RESULTS： Obvious pathological changes were observed, such as hemorrhage, edema, and cell necrosis, following brain injury. These alterations w

关键词： oxygen therapy acupuncture brain injury malondialdehyde superoxide dismutase nitdc oxide synthase hemorheological index

Metal-Free Photocatalytic[4+2]Annulation of Acrylamides with 2-Benzyl-2-bromocarbonyls to Assemble Tetralin-1-carboxamides

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Chinese Journal of Chemistry 2024年第2期42卷 157-163页

作者： Weicai li Lu Tan Yijun Chen Rui liu Zhongyu Qi Shixuan Yuan zhanwen Huang Siping Wei Xi Du Dong Yi Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province School of PharmacySouthwest Medical UniversityLuzhouSichuan 646000China Department of Chemistry School of Basic Medical ScienceSouthwest Medical UniversityLuzhouSichuan 646000China Department of Pharmacy Affiliated HospitalSouthwest Medical UniversityLuzhouSichuan 646000China

Tetralin-1-carboxamides are frequently incorporated in myriad medicinally important ***,their existing synthetic routes not only suffer from some drawbacks such as tedious procedures,harsh reaction conditions,narrow substrate scope,low yields,and environmental problems,but are also based upon the elaboration of uneasily available non-linear tetralin ***,we describe a metal-and additive-free visible light-induced[4+2]annulation of two simple linear starting materials,namely acrylamides and 2-benzyl-2-bromocarbonyls,through a cascade C(sp^(3))-Br/C(sp^(2))-H bond cleavage,double C-C bond formation,and aromatization *** developed protocol provides a convenient,efficient,and green approach to a variety of tetralin-1-carboxamide derivatives with good functional group ***,the resulting products could also undergo the licl-mediated mono-decarboxylative cyclization process to further furnish the architecturally novel bridged polycyclic imides with excellentcis-diastereoselectivities.

关键词： Annulation Metal-free Photoredox catalysis Tetralin-1-carboxamide Cyclic imides Synthetic methods C-C coupling Radical reactions Reaction mechanisms

六经辨证手法经络推拿联合针刺治疗神经根型颈椎病临床效果观察

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四川中医 2024年第2期42卷 189-193页

作者：王嘉嘉田向东黎展文文永海钟潇羽庞金海廖健明梁一新廖信祥玉林市中医医院推拿科广西玉林537000 北京中医药大学第三附属医院微创关节科北京100029

目的:探讨六经辨证手法经络推拿联合针刺治疗神经根型颈椎病临床效果及优势。方法:选取2019年10月~2021年10月在广西玉林市中医医院推拿科二区住院的诊断为神经根型颈椎病患者90例作为研究对象,采用随机方法将其分成治疗组和对照组(各45... 详细信息

目的:探讨六经辨证手法经络推拿联合针刺治疗神经根型颈椎病临床效果及优势。方法:选取2019年10月~2021年10月在广西玉林市中医医院推拿科二区住院的诊断为神经根型颈椎病患者90例作为研究对象,采用随机方法将其分成治疗组和对照组(各45人)。治疗组采用六经辨证手法经络推拿综合针刺疗法,对照组采用非经络辨证推拿手法综合针刺疗法,两组持续治疗时间为2周,以治疗前、治疗后及出院后1周、出院后4周为时间点进行考察,并采用中医评价量表、日本骨科协会评分(JOA)、视觉模拟痛觉评分(VAS)、颈椎功能障碍指数评分(NDI)进行记录,比较两组患者症状改善情况。结果:两组患者均完成全部治疗无不良事件发生。经治疗后,治疗组总有效率95.6%,对照组总有效率82.2%,治疗组中医评价高于对照组,差异有统计学意义(P0.05),治疗组的治疗后即时、出院后1周、出院后4周的VAS评分、NDI评分低于对照组,JOA评分高于对照组,差异具有明显统计学意义(P<0.05)。研究总结:六经辨证经络手法推拿联合针刺治疗具有个体化的优势,可明显改善神经根型颈椎病放射性疼痛、麻木、乏力的三大临床症状,较普通推拿手法和针刺治疗而言,更具有推广意义。

关键词：六经辨证循经论治手法推拿神经根型颈椎病

Restarted FOM Augmented with Ritz Vectors for Shifted linear Systems

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Numerical Mathematics A Journal of Chinese Universities(English Series) 2006年第1期15卷 40-49页

作者： zhanwen li Guiding Gu Department of Mathematics Hebei University of Science and Technology Shift-azhuang 050018 China. Department of Applied Mathematics Shanghai University of Finance and Eco-nomics Shanghai 200433 China.

The restarted FOM method presented by Simoncini[7]according to the natural collinearity of all residuals is an efficient method for solving shifted systems,which generates the same Krylov subspace when the shifts are handled ***,restarting slows down the *** present a practical method for solving the shifted systems by adding some Ritz vectors into the Krylov subspace to form an augmented Krylov subspace. Numerical experiments illustrate that the augmented FOM approach(restarted version)can converge more quickly than the restarted FOM method.

关键词： Krylov空间 FOM 重新启动移动线性系统质量因数

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镍磷合金微沟槽金刚石切削泊松毛刺形成机理

光学精密工程 2024年第8期32卷 1140-1152页

作者：李晓蓬余亮宝孙占文王素娟广东工业大学省部共建精密电子制造技术与装备国家重点实验室广东广州510006

为了探究镍磷合金超精密切削过程中泊松毛刺的形成原因及规律,并且寻求泊松毛刺尺寸更精准的表征方式,本文通过对镍磷合金泊松毛刺的形成机理进行理论分析,建立其正交切削过程中的泊松毛刺高度和宽度预测模型,并通过实验分析切削参数对... 详细信息

为了探究镍磷合金超精密切削过程中泊松毛刺的形成原因及规律,并且寻求泊松毛刺尺寸更精准的表征方式,本文通过对镍磷合金泊松毛刺的形成机理进行理论分析,建立其正交切削过程中的泊松毛刺高度和宽度预测模型,并通过实验分析切削参数对泊松毛刺高度和宽度的影响,通过实验观察可知,切削深度对毛刺尺寸影响显著,切削深度由3μm增加至9μm时,毛刺高度增加了0.0998μm,毛刺宽度增加了1.06μm,而切削速度对毛刺高度及宽度的影响很小。且通过对比实验得到的毛刺数据和预测数据可知,毛刺高度和宽度预测模型的平均相对误差值分别为5.43%和8.17%,验证了预测模型的准确性。同时目前的泊松毛刺高度和宽度表征方法具有一定的误差,因此本文提出了利用积分法计算泊松毛刺体积的方法,并基于体积法建立了更准确的泊松毛刺尺寸表征方法,通过计算得到体积的预测模型平均相对误差值为4.81%,可知泊松毛刺体积的预测模型准确度相对更高。研究结果为镍磷合金正交切削过程中合理选择切削参数和泊松毛刺尺寸评估方法提供了理论指导。

关键词：微沟槽切削镍磷合金毛刺生成金刚石切削

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建设节约型机关后勤的认识与思考

中国水利 2010年第4期 61-62页

作者：李站稳水利部机关服务局北京100053

建设节约型社会是一件功在当代、利在下秋的大事，必须抓紧抓好。胡锦涛总书记指出：“全党全社会必须按照科学发展观的要求，切实增强忧患意识和危机意识．充分认识建设资源节约型社会的重要性和紧迫性，下最大决心、

关键词：节约型社会机关后勤节能节水

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人工智能在新型冠状病毒肺炎中的研究综述

计算机工程与应用 2023年第5期59卷 28-39页

作者：孙书魁范菁李占稳曲金帅路佩东云南民族大学电气信息工程学院昆明650000 云南民族大学云南省高校信息与通信安全灾备重点实验室昆明650000 哈尔滨医科大学第二临床医学院哈尔滨150000

新型冠状病毒肺炎(corona virus disease,COVID-19)的暴发对全球人类的生命财产安全造成了巨大威胁。人工智能(artificial intelligence,AI)为助力打赢这场疫情攻坚战发挥了不可替代的作用。由于AI的助力,医疗资源紧张的问题得到大幅度... 详细信息

新型冠状病毒肺炎(corona virus disease,COVID-19)的暴发对全球人类的生命财产安全造成了巨大威胁。人工智能(artificial intelligence,AI)为助力打赢这场疫情攻坚战发挥了不可替代的作用。由于AI的助力,医疗资源紧张的问题得到大幅度缓解,并提高了医疗诊断效率,同时也避免接触感染的风险。阐述了COVID-19和AI的背景知识,从疫情趋势预测、疫情溯源追踪、检测诊断、药物开发、疫苗研制、药物再利用、网络舆论管控以及基因组测序这8个疫情防控的环节讨论了AI在本次COVID-19中的研究进展,并列举本次疫情中AI所面临的挑战,浅谈本次疫情对我国AI产业影响以及两者的辩证关系,对全文进行总结。

关键词：人工智能新型冠状病毒肺炎疫情防控深度学习

极端灾害下基于综合需求响应的电-水-气综合能源系统负荷恢复策略

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高电压技术 2024年第4期50卷 1403-1415,I0005-I0007页

作者：李春燕唐瞻文汤佶元姚一鸣刘杨输变电装备技术全国重点实验室(重庆大学) 重庆400044

在地震等极端自然灾害下,电-水-气综合能源系统的元件故障概率会大幅提升,进而严重影响系统的正常运行。针对目前忽略用户在提升系统弹性上的潜力,基于综合需求响应对电-水-气综合能源系统负荷恢复策略进行研究。首先基于多能源之间的... 详细信息

在地震等极端自然灾害下,电-水-气综合能源系统的元件故障概率会大幅提升,进而严重影响系统的正常运行。针对目前忽略用户在提升系统弹性上的潜力,基于综合需求响应对电-水-气综合能源系统负荷恢复策略进行研究。首先基于多能源之间的耦合特性与用户的动态响应特性建立综合需求响应模型。其次设计系统与用户协同的需求响应参与机制,将用户的综合需求响应作为灵活性资源融入极端灾害下的负荷恢复策略中,有效、合理地提升系统弹性。最后建立电-水-气综合能源系统负荷恢复优化模型,通过改造的电-水-气综合能源系统对所提出的方法进行了模拟和验证。结果表明,所提出的负荷恢复策略能够提高灾后系统负荷的恢复比例,有效增强系统的弹性。

关键词：极端灾害弹性综合能源系统负荷恢复综合需求响应

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