检索结果-南通市图书馆

YAG激光打标机变焦f-theta镜扫描系统

在线全文

学校读者我要写书评

暂无评论

激光与红外 2009年第1期39卷 14-17页

作者：高润梅高贵常胜江史新刚傅儒廉桂林工学院数理系广西桂林541004 天津工业大学理学院天津300160 南开大学现代光学研究所天津300071

为Nd∶YAG激光打标机设计了变焦距f-theta镜扫描系统,以使它适用于不同的打标面积而不必更换镜头,系统由四片透镜组成,材料分别为BK7、SF18和SF11,系统总长度为122.96mm,工作波长1064nm。利用f-theta镜的负畸变效应和机械变焦原理,将四... 详细信息

为Nd∶YAG激光打标机设计了变焦距f-theta镜扫描系统,以使它适用于不同的打标面积而不必更换镜头,系统由四片透镜组成,材料分别为BK7、SF18和SF11,系统总长度为122.96mm,工作波长1064nm。利用f-theta镜的负畸变效应和机械变焦原理,将四片镜设计组合成两个可变档系统,系统的有效焦距分别为f-theta镜的两个常用焦距:350mm和400mm,相应的扫描范围分别为220mm×220mm,250mm×250mm,扫描角都为±18°。系统像面在0视场、0.7视场和全视场的光斑都落在相应的爱里斑以内,系统的MTF曲线接近相应的衍射极限曲线,最大波像差小于四分之一波长,系统的最大场曲和最大f-theta相对畸变都很好地满足了国内激光打标机的精度要求。

关键词：激光技术 f-theta镜变焦畸变

The first power generation test of hot dry rock resources exploration and production demonstration project in the Gonghe Basin,Qinghai Province,China

在线全文

学校读者我要写书评

暂无评论

China Geology 2022年第3期5卷 372-382页

作者： Er-yong Zhang Dong-guang Wen Gui-ling Wang Wei-de Yan Wen-shi Wang Cheng-ming Ye Xu-feng Li Huang Wang Xian-chun Tang Wei Weng Kuan Li Chong-yuan Zhang Ming-xing Liang Hong-bao Luo Han-yue Hu Wei Zhang Sen-qi Zhang Xian-peng Jin Hai-dong Wu Lin-you Zhang Qing-da Feng Jing-yu Xie Dan Wang Yun-chao He Yue-wei Wang Zu-bin Chen Zheng-pu Cheng Wei-feng Luo Yi Yang Hao Zhang En-lai Zha Yu-lie Gong Yu Zheng chang-sheng jiang sheng-sheng Zhang Xue Niu Hui Zhang Li-sha Hu Gui-lin Zhu Wen-hao Xu Zhao-xuan Niu Li Yang Center for Hydrogeology and Environmental Geology Survey China Geological SurveyMinistry of Natural ResourcesBaoding 071051China Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesChina Geological SurveyShijiazhuang 050061China Department of Natural Resources of Qinghai Province Xining 810001China Institute of Exploration Techniques Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Department of Hydrogeology and Environmental Geology China Geological SurveyMinistry of Natural ResourcesBeijing 100037China Chinese Academy of Geological Sciences China Geological SurveyBeijing 100037China Beijing Institute of Exploration Engineering China Geological SurveyMinistry of Natural ResourcesBeijing 100083China Institute of Geomechanics Chinese Academy of Geological SciencesChina Geological SurveyBeijing 100081China Institute of Geophysical and Geochemical Exploration Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Institute of Exploration Technology Chinese Academy of Geological SciencesChina Geological SurveyChengdu 611734China Geoscience Documentation Center China Geological SurveyMinistry of Natural ResourcesBeijing 100083China Jilin University Changchun 130012China Oil and Gas Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Institute of Geophysics China Earthquake AdministrationBeijing 100081China Institute of the Hydrogeology and Engineering Geology of Qinghai Xining 810008China

Hot dry rock(HDR)is a kind of clean energy with significant *** the 1970s,the United States,Japan,France,Australia,and other countries have attempted to conduct several HDR development research projects to extract thermal energy by breaking through key ***,up to now,the development of HDR is still in the research,development,and demonstration *** HDR exploration borehole(with 236℃ at a depth of 3705 m)was drilled into Triassic granite in the Gonghe Basin in northwest China in ***,China Geological Survey(CGS)launched the HDR resources exploration and production demonstration project in *** three years of efforts,a sequence of significant technological breakthroughs have been made,including the genetic model of deep heat sources,directional drilling and well completion in high-temperature hard rock,large-scale reservoir stimulation,reservoir characterization,and productivity evaluation,reservoir connectivity and flow circulation,efficient thermoelectric conversion,monitoring,and geological risk assessment,*** the whole-process technological system for HDR exploration and production has been preliminarily established *** first power generation test was completed in November *** results of this project will provide scientific support for HDR development and utilization in the future.

关键词： Hot dry rock Directional drilling Reservoir stimulation Microseismic monitoring Organic Rankine cycle(ORC) Power generation test Energy geological survey engineering Gonghe Basin Qinghai Province China

Applying Hopfield neural networkto QoSroutingin communication network

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2005年第3期 63-66页

作者： WANG Li~2, SHEN Jin-yuan~(1,2**), chang sheng-jiang~2, and ZHANG Yan-xin~21. College of Information Engineering,Zhengzhou University,Zhengzhou 450052,P.R.China2. Institute of Modern Optics,Nankai University,Tianjin 300071,P.R.China

The main goal of routing solutions is to satisfy the requirements of the Quality of Service (QoS) for every admitted connection as well as to achieve a global efficiency in resource *** this paper proposes a solution based on Hopfield neural network (HNN) to deal with one of representative routing problems in uni-cast routing,*** multi-constrained(MC) routing *** simulation shows that we can obtain the optimal path very rapidly with our new Lyapunov energy functions.

关键词： node HNN IEEE

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

实现虚拟输出队列调度的神经网络方法

光电子．激光 2005年第11期16卷 1316-1320页

作者：张便利常胜江李江卫熊涛郜洪云申金媛张延炘南开大学现代光学研究所教育部光电信息技术重点实验室天津300071 南开大学出版社天津300071 郑州大学信息工程学院河南郑州450052

基于虚拟输出队列(VOQ)缓存的Crossbar交换结构,提出了一种Hopfield神经网络(HNN)控制的信元交换调度方法。通过选取合适的能量函数,并在其中采用一种新的队列优先级函数,实现了信元的高效交换控制。计算机模拟结果表明,该算法可以将吞... 详细信息

基于虚拟输出队列(VOQ)缓存的Crossbar交换结构,提出了一种Hopfield神经网络(HNN)控制的信元交换调度方法。通过选取合适的能量函数,并在其中采用一种新的队列优先级函数,实现了信元的高效交换控制。计算机模拟结果表明,该算法可以将吞吐率提高到0.998,信元丢失率大大降低,时延特性也有很大改善。

关键词： Hopfield神经网络(HNN) 虚拟输出队列(VOQ) 队列优先级函数

在线全文

学校读者我要写书评

暂无评论

基于独立成分分析的复杂光谱的定量分析

光电子．激光 2007年第6期18卷 741-745页

作者：王建华郑震张延炘胡颖新常胜江南开大学现代光学研究所光电信息科学教育部重点实验室天津300071

基于独立成分分析(ICA)算法,对超短脉冲激光与气体相互作用所产生的复杂的非线性荧光光谱数据进行了有效的特征提取,进而对空气中含有的3种杂质气体在不同浓度下的光谱进行了预测,得到的结果与实测值相比较误差很小。对这3种气体共计27... 详细信息

基于独立成分分析(ICA)算法,对超短脉冲激光与气体相互作用所产生的复杂的非线性荧光光谱数据进行了有效的特征提取,进而对空气中含有的3种杂质气体在不同浓度下的光谱进行了预测,得到的结果与实测值相比较误差很小。对这3种气体共计27组光谱数据进行浓度值的定量预测,达到了满意的实验结果。

关键词：非线性荧光光谱独立成分分析(ICA) 特征提取气体识别

CO_2激光打标机变焦f-theta透镜的设计

在线全文

学校读者我要写书评

暂无评论

激光杂志 2009年第4期30卷 17-18页

作者：史新刚高润梅吴华夏常胜江傅汝廉董戴安徽华东光电技术研究所现代成像省重点实验室安徽芜湖241002 桂林工学院数理系广西桂林541004 南开大学现代光学研究所天津370001

为CO2激光打标机设计了变焦距f-theta扫描聚焦系统,以使它适用于不同打标面积而不必更换镜头,该系统由三片透镜组成,材料为GaAs,工作波长为10.6μm,系统总长度为41.45mm。利用f-theta镜的负畸变效应和机械变焦原理,将三片透镜设计组合... 详细信息

为CO2激光打标机设计了变焦距f-theta扫描聚焦系统,以使它适用于不同打标面积而不必更换镜头,该系统由三片透镜组成,材料为GaAs,工作波长为10.6μm,系统总长度为41.45mm。利用f-theta镜的负畸变效应和机械变焦原理,将三片透镜设计组合为具有三个可变档系统,该系统有效焦距分别为f-theta镜的三个常用焦距:305mm、360mm和410mm,相应扫描范围分别为:210×210mm2、250×250mm2和280×280mm2,扫描角均为±20°。像面上系统在零视场、0.7视场和全视场的光斑都落在相应的爱里斑以内,三种情况下,系统的MTF曲线分别接近相应的衍射极限曲线,系统的最大场曲和最大f-theta相对畸变都能满足国内激光打标机的精度要求。

关键词：激光技术 f—theta镜变焦畸变

有毒乌头类中药炮制与配伍减毒机制的研究进展

在线全文

学校读者我要写书评

暂无评论

中国中药杂志 2019年第17期44卷 3695-3704页

作者：魏旭雅邱子栋陈金龙孙瑞琦黄璐琦赖长江生中国中医科学院中药资源中心道地药材国家重点实验室培育基地北京100700 大理大学药学与化学学院云南大理671000

以川乌、草乌、附子等为代表的乌头类中药在中国具有悠久的药用历史,是一类兼具强毒性与优药效的"毒效双性"中药,具有显著的回阳救逆、祛风除湿、消炎止痛等功效,备受历代医家推崇。但是,乌头碱中毒案例屡见不鲜,如果使用不当,极易超出... 详细信息

以川乌、草乌、附子等为代表的乌头类中药在中国具有悠久的药用历史,是一类兼具强毒性与优药效的"毒效双性"中药,具有显著的回阳救逆、祛风除湿、消炎止痛等功效,备受历代医家推崇。但是,乌头碱中毒案例屡见不鲜,如果使用不当,极易超出其狭窄的治疗窗,进而引发恶性的心脏、神经等毒性,严重危及生理健康与生命安全。故在临床上,往往采用乌头类中药的炮制品或与其他中药配伍使用,在保留其良好药效的同时有效降低毒性,保证用药安全。合适的炮制方法和配伍原则不仅可以有效降低各种毒性、减少不良反应及副作用的发生,还可显著增加乌头类中药的适应症、拓宽其使用范围,为乌头类中药的二次开发利用提供有利保障。该文综述了古代和现代乌头类中药的炮制方法及工艺、常见配伍组方原则及其减毒机制,发现主要包括物理减毒和化学减毒两类方法,其中水解减毒、"离子对"减毒和皂化减毒是其主要方式。该文揭示的减毒机制有望指导乌头类中药现代炮制工艺开发和临床合理用药。

关键词：川乌附子草乌炮制配伍减毒机制

Numerical Comparison for Focused Wave Propagation Between the Fully Nonlinear Potential Flow and the Viscous Fluid Flow Models

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2020年第2期34卷 279-288页

作者： jiang sheng-chao LIU chang-feng SUN Lei School of Naval Architecture State Key Laboratory of Structural Analysis for Industrial EquipmentDalian University of TechnologyDalian 116024China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China College of Ocean and Civil Engineering Dalian Ocean UniversityDalian 116023China

Numerical simulations on focused wave propagation are carried out by using three types of numerical models,including the linear potential flow,the nonlinear potential flow and the viscous fluid flow *** wave-wave interaction of the focused wave group with different frequency bands and input wave amplitudes is examined,by which the influence of free surface nonlinearity and fluid viscosity on the related phenomenon of focused wave is *** significant influence of free surface nonlinearity on the characteristics of focused wave can be observed,including the increased focused wave crest,delayed focused time and downstream shift of focused position with the increase of input *** can plot the evident difference between the results of the nonlinear potential flow and linear potential flow ***,only a little discrepancy between the nonlinear potential flow and viscous fluid flow models can be observed,implying the insignificant effect of fluid viscosity on focused wave ***,the nonlinear potential flow model is recommended for simulating the non-breaking focused wave problem in this study.

关键词： focused wave linear potential flow fully nonlinear potential flow viscous fluid flow boundary element method OpenFOAM

Deciphering the molecular mechanisms of Simiaowan in the treatment of hyperuricemia: in vivo and in silico approaches

在线全文

学校读者我要写书评

暂无评论

Traditional Medicine Research 2025年第2期10卷 37-54页

作者： Yong-chang Zeng Jun-Hong Wu Dan-Dan Xu Kang He chang-Qing Liu Li-Fei Song Zheng-Zhi Wu Qian-Qian jiang Shao-Yu Liang Department of Neurology The First Affiliated Hospital of Shenzhen UniversityShenzhen 518020China Pharmaceutical Department The Affiliated TCM Hospital of Guangzhou Medical UniversityGuangzhou 510000China School of Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang 550025China Guangzhou Zeli Medical Technology Co. Ltd.Guangzhou 510700China

Background:Simiaowan(SMW),a well-known traditional Chinese medicine,has been employed to treat hyperuricemia(HUA)and gout for ***,the bioactive components and underlying mechanisms have not been *** objective of this study was to identify the active components and potential mechanisms of SMW by integrating pharmacological experimentation,serum pharmacochemistry,network pharmacology and molecular ***:HUA rats modelling by high-fat/high-sugar diet and potassium oxonate/adenine oral administration were used to evaluate the pharmacodynamic effects of ***-Q-Exactive-MS/MS was employed to detect the bioactive components present in SMW-containing *** pharmacology and molecular docking were utilized to elucidate the potential targets and underlying ***:SMW effectively ameliorated HUA rats via the inhibition of uric acid(UA)production,promotion of UA excretion,improvement of lipid and glucose metabolic abnormalities,antioxidant,anti-inflammatory and anti-insulin resistance effects.A total of 73 compounds detected in SMW-containing serum were identified as potential active components,with alkaloids,flavonoids,organic acids,and terpenoids emerging as the primary active *** 203 corresponding targets were obtained as SMW anti-HUA/gout targets,which mainly participated in apoptosis,insulin resistance,TNF,PI3K-Akt,HIF-1,NF-κB,MAPK,IL-17 and TLR signaling *** docking indicated that active compounds(***,phellodendrine,quercetin,formononetin,ferulic acid)had superior binding abilities to the key targets(*** carrier family 22 member 12(URAT1),solute carrier family 22 member 6(OAT1),ATP-binding cassette sub-family G member 2(ABCG2),solute carrier family 2,facilitated glucose transporter member 9(GLUT9),xanthine dehydrogenase/oxidase(XDH),transcription factor p65(RELA),toll-like receptor 4(TLR4),prostaglandin G/H synthase 2(PTGS2),caspase-3(CASP3),insulin(INS)).Conclusion:S

关键词： hyperuricemia network pharmacology serum pharmacochemistry Simiaowan UPLC-Q-Exactive-MS/MS