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

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

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Core competencies and perceived training needs of nurses in the background of Internet plus nursing service:a qualitative descriptive study

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Frontiers of Nursing 2024年第2期11卷 181-190页

作者： qiang-Hui-Zi Zhang wei-wei Liu Zhen-Zhen Cheng School of Nursing Capital Medical UniversityBeijing 100069China Department of Orthopedics Peking University Shougang HospitalBeijing 100043China

Background:The Internet plus nursing service program is being piloted in China,which has become a new home nursing service model led by *** enable safe and effective homecare service delivery,nurses working in the program need a high level of ***,the content of these core competencies and the training needs of nurses for Internet plus nursing services are still ***:To describe nurses’perceptions of core competencies and training needs to work in the Internet plus nursing service program,thereby providing a reference for the development of training ***:A qualitative descriptive study using semi-structured interviews was conducted on 15 nurses with experience of working in the Internet plus nursing service *** were audio-recorded and transcribed verbatim,and the data were analyzed using thematic ***:Core competencies involved comprehensive assessment competence,direct care practice competence,health education and consulting competence,risk estimation and response competence,and communication *** needs involved complex operational items,knowledge of chronic disease management,professional communication,risk identification and response,nursing standards,norms,and procedures,and utilization of information ***:The training system may be developed based on nurses’core competencies and their training needs to promote professional development of the Internet plus nursing service.

关键词： core competence Internet plus nursing service nursing qualitative study training needs

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COL4A2 enhances thyroid cancer cell proliferation through the AKT pathway

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Oncology Research 2024年第9期32卷 1467-1478页

作者： LIANG HE wei han KAI YUE XUDONG WANG Department of Maxillofacial and Otorhinolaryngological Oncology Tianjin Medical University Cancer Institute and HospitalKey Laboratory of Basic and Translational Medicine on Head&Neck Cancer(Tianjin)Key Laboratory of Cancer Prevention and TherapyTianjin Cancer InstituteNational Clinical Research Center for CancerTianjin300060China Department of Thyroid&Breast Surgery Luoyang Central HospitalLuoyang471000China Department of Otorhinolaryngological Surgery Zhengzhou Central HospitalZhengzhou450000China

Objectives:Thyroid cancer(THCA)is the most common malignant tumor in endocrine system and the incidence has been increasing *** the number of patients dying from THCA has also gradually risen because the incidence continues to increase,so the mechanisms related to effective targets is necessary to improve the *** study was to preliminarily investigate the effects of the COL4A2 gene on the regulation of thyroid cancer(THCA)cell proliferation and the associated ***:Bioinformatics analysis revealed that COL4A2 was closely associated with cancer ***4A2 expression in THCA tissues was analyzed using immunohistochemistry,and survival information was determined via Kaplan-Meier *** expression of COL4A2 and AKT pathway-related genes were analyzed using qPCR and western blot *** formation as well as CCK-8 assays exhibited the cell proliferation level and cell activity,*** of COL4A2 was identified by Gene set enrichment analysis(GSEA).The effects of the COL4A2 and AKT pathways on THCA tumor growth in vivo were determined using a mouse ***:Bioinformatics analysis exhibited that COL4A2 plays a significant role in cancer and that the AKT pathway is downstream of *** patients with high COL4A2 expression had shorter recurrence-free *** of COL4A2 gene expression in 2 THCA cell lines promoted tumor cell growth and *** use of AKT pathway blockers also restrained the growth and activity of the 2 THCA cell *** use of AKT pathway blockers reduced tumor volume and mass and prolonged mouse ***:COL4A2 can promote the growth as well as development of THCA through the AKT pathway and COL4A2 could be used as a target for THCA.

关键词： Thyroid cancer(THCA) Proliferation COL4A2 AKT pathway Biomarker cancer progression

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一种实时消除望远镜图像旋转的方法

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光电工程 2006年第7期33卷 88-91,95页

作者：韩维强廖胜谭述亮中国科学院光电技术研究所微细加工光学技术国家重点实验室四川成都610209

利用光线追迹的方法分析了地平式天文望远镜的几面反射镜在望远镜的竖直轴、水平轴转动时所引起的图像旋转,给出了目标图像旋转与望远镜高低方位角之间的函数关系式。并利用别汉棱镜转像的特性在成像光路中加入了实时图像消旋系统。经... 详细信息

利用光线追迹的方法分析了地平式天文望远镜的几面反射镜在望远镜的竖直轴、水平轴转动时所引起的图像旋转,给出了目标图像旋转与望远镜高低方位角之间的函数关系式。并利用别汉棱镜转像的特性在成像光路中加入了实时图像消旋系统。经试验验证,在不同方位角、天顶距情况下采集的目标图像其消旋残差仅为25arcsec,即使在图像边缘处目标图像的消旋残差也小于0.2像素。

关键词：光线追迹图像旋转别汉棱镜天文望远镜

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Effect of chemical regulators on the recovery of leaf physiology,dry matter accumulation and translocation,and yield-related characteristics in winter wheat following dry-hot wind

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Journal of Integrative Agriculture 2024年第1期23卷 108-121页

作者： Yanan Xu Yue Wu Yan han Jiqing Song Wenying Zhang wei han Binhui Liu Wenbo Bai Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China Institute of Dryland Farming Research Hebei Academy of Agriculture and Forestry SciencesHengshui 053000China Shandong General Station of Agricultural Technology Extension Jinan 250100China

Dry-hot wind stress causes losses in wheat productivity in major growing regions worldwide,especially winter wheat in the Huang-Huai-Hai Plain of China,and both the occurrence and severity of such events are likely to increase with global climate *** investigate the recovery of physiological functions and yield formation using a new noncommercial chemical regulator(NCR)following dry-hot wind stress,we conducted a three-year field experiment(2018-2021)with sprayed treatments of tap water(control),monopotassium phosphate(CKP),NCR at both the jointing and flowering stages(CFS),and NCR only at the jointing stage(FSJ)or flowering stage(FSF).The leaf physiology,biomass accumulation and translocation,grain-filling process,and yield components in winter wheat were *** the single spraying treatments,the FSJ treatment was beneficial for the accumulation of dry matter before anthesis,as well as larger increases in the maximum grain-filling rate and mean grain-filling *** FSF treatment performed better in maintaining a high relative chlorophyll content as indicated by the SPAD value,and a low rate of excised leaf water loss in flag leaves,promoting dry matter accumulation and the contribution to grain after anthesis,prolonging the duration of grain filling,and causing the period until the maximum grain-filling rate reached *** CFS treatment was better than any other treatments in relieving the effects of dry-hot *** exogenous NCR treatments significantly increased grain yields by 12.45-18.20% in 2018-2019,8.89-13.82% in 2019-2020,and 8.10-9.00% in *** conventional measure of the CKP treatment only increased grain yield by 6.69% in *** CFS treatment had the greatest mitigating effect on yield loss under dry-hot wind stress,followed by the FSF and FSJ treatments,and the CKP treatment only had a minimal *** summary,the CFS treatment could be used as the main chemical control measure for wheat stress resistance and yield

关键词： preparation stress foliar spraying grain-filling remobilization

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含水DPF压降特性的试验研究

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内燃机工程 2015年第3期36卷 68-71页

作者：孟忠伟李路陈鹏闫妍韩伟强西华大学交通与汽车工程学院汽车测控与安全四川省重点实验室成都610039 凯龙高科技股份有限公司无锡214177

基于外加热源再生性能测试台架，研究了柴油机颗粒捕集器（dieselparticulatefilter，DPF）含水时运行参数和孔隙结构参数对其压降特性的影响规律。试验结果表明：含水DPF的压降随着含水率的降低均呈保持稳定、迅速降低、缓慢降低三阶... 详细信息

基于外加热源再生性能测试台架，研究了柴油机颗粒捕集器（dieselparticulatefilter，DPF）含水时运行参数和孔隙结构参数对其压降特性的影响规律。试验结果表明：含水DPF的压降随着含水率的降低均呈保持稳定、迅速降低、缓慢降低三阶段变化，存在压降敏感区域。在含水率较高时，含水率随着时间的增长而迅速降低，此后含水率随着时间增长线性降低。随着来流流量和来流温度的增加，压降敏感区域保持不变，含水率分布在23％～35％。随着载体孔隙率和微孔孔径的增大，压降敏感区域变窄，含水率分布在26％～35％。

关键词：内燃机柴油机颗粒捕集器压降含水率敏感区域

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Construction of metallo-complexes with 2,2′:6′,2″-terpyridine substituted triphenylamine in different modified positions and their photophysical properties

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Chinese Chemical Letters 2024年第7期35卷 301-305页

作者： Shengwen Guan Zhaotong wei Ningxu han Yude wei Bin Xu Ming Wang Junjuan Shi State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

The stable coordinated metallo-complexes based on 2,2′:6′,2″-terpyridine(tpy)and its derivatives have been widely researched for various wide-ranging applications in photoelectronics,catalysis,sensor,photoluminescence,and so ***,the most reported studies ignored the comprehensive comparison between structures modified by different positions and ***,we design a series of metallo-complexes which were assembled with tpy substituted triphenylamine(TPA)at different positions and metal ions and explored their photophysical *** the solution state,MLE_(2)based on the 5,5″-positions modification showed the highest PLQYs and PL *** the increase of solvent polarity,MLB2exhibit the largest *** the solid state,from MLA_(2)to MLE_(2),the emission colours are gradually red-shifted from yellow to *** findings in this work may pave a new way to design functional metallo-complexes,not just for PL properties.

关键词： Metallo-complexes 2,2′:6′,2″-terpyridine Triphenylamine Different modified positions Photophysical properties

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Bioinspired ionic control for energy and information flow

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International Journal of Smart and Nano Materials 2024年第1期15卷 198-221页

作者： Puguang Peng han Qian Jiajin Liu Zhonglin Wang Di wei Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijingChina School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijingChina School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGAUSA

The control of ion transport by responding to stimulus is a necessary condition for the existence of *** iontronics could enable anomalous ion dynamics in the nano-confined spaces,creating many efficient energy systems and neuromorphic in-sensor computing networks:Unlike tradi-tional electronics based on von Neumann computing architec-ture,the Boolean logic computing based on the iontronics could avoid complex wiring with higher energy efficiency and programmable neuromorphic ***,a systematic summary on the state of art in bioinspired iontronics is pre-sented and the stimulus from chemical potentials,electric fields,light,heat,piezo and magnetic fields on ion dynamics are *** and perspectives are also addressed in the aspects of iontronic integrated *** is believed that comprehensive investigations in bioinspired ionic control will accelerate the development on more efficient energy and information flow for the futuristic human-machine interface.

关键词： lontronics nanoconfined ion transport ion dynamics bioinspired iontronics ionic-electronic coupling interface

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Molecular Ferroelastic Induced by Mono-/Double-Protonation Strategy

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Chinese Journal of Chemistry 2024年第15期42卷 1706-1712页

作者： Jia-Qi Luo Meng-Meng Lun qiang-qiang Jia Zhi-Jie Wang Hai-Feng Lu Yi Zhang Da-wei Fu Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhuaZhejiang 321004China Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjingJiangsu 211189China

Molecular ferroelastics with the natural features of mechanical flexibility and switchable spontaneous strain have attracted widespread attention in the scientific community due to their potential applications in tunable gratings,flexible memorizers,strain sensors,and intelligent ***,most designs of molecular ferroelastics remain in the stage of blind exploration,posing a challenge to achieve a functional ferroelastic more ***,we have successfully obtained a molecular ferroelastic,[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2)(Me_(2)NH(CH_(2))_(2)NH_(3)=N,N-dimethylethylenediammonium),under the guidance of the mono-/double-protonation ***_double-protonated[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2) undergoes a paraelastic-ferroelastic phase transition with the Aizu notation of 2/mFi at 322 ***,the theoretical calculation and experimental measurement simultaneously show that[Me_(2)NH(CH_(2))_(2)NH_(3)](ReO_(4))_(2) possesses good mechanical flexibility,because its elastic modulus(E)of 8.26 GPa and hardness(H)of 0.45 GPa are smaller than the average values of organic crystals(E of 12.05 GPa and H of 0.5 GPa),which makes it promising to apply in wearable pressure sensors,implantable medical sensors,high-precision tuners,*** work further enriches the molecular ferroelastic family and demonstrates that mono-/double-protonation is one of the effective molecular modification strategies for designing ferroelastics.

关键词： Molecular crystal Ferroelastic Mono-/double-protonation Mechanical flexibility Phase transition Crystal engineering Computational chemistry Molecular dynamics

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Research progress on micro-force measurement of a hydrate particle system

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Petroleum Science 2024年第4期21卷 2169-2183页

作者： qiang Luo wei Li Zhi-Hui Liu Feng Wang Zhi-Chao Liu Fu-Long Ning Faculty of Engineering China University of Geosciences (Wuhan) Suzhou Laboratory

It remains a great challenge to understand the hydrates involved in phenomena in practical oil and gas systems. The adhesion forces between hydrate particles, between hydrate particles and pipe walls, and between hydrate particles and reservoir particles are essential factors that control the behaviors of clathrate hydrates in different applications. In this review, we summarize the typical micro-force measurement apparatus and methods utilized to study hydrate particle systems. In addition, the adhesion test results, the related understandings, and the applied numerical calculation models are systematically discussed.

关键词： Clathrate hydrates Hydrate particle Micro-force measurements Adhesion Interactions

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