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一种基于柱面镜聚焦系统的高灵敏度全谱光谱仪

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光谱学与光谱分析 2025年第1期45卷 222-230页

作者：陈吉文陈作儿赵迎北方工业大学电气与控制工程学院北京100144

很多元素的最灵敏谱线主要分布在紫外波段。一些常被作为检测对象的重要元素,例如C、P和S,其谱线甚至位于200 nm以下的真空紫外波段。然而真空紫外波段内的辐射极易受空气吸收而无法在空气中传输。因此为了适用于紫外波段各谱线的检测,... 详细信息

很多元素的最灵敏谱线主要分布在紫外波段。一些常被作为检测对象的重要元素,例如C、P和S,其谱线甚至位于200 nm以下的真空紫外波段。然而真空紫外波段内的辐射极易受空气吸收而无法在空气中传输。因此为了适用于紫外波段各谱线的检测,常使用光程短、系统精简的罗兰圆光学系统作为光谱仪的色散系统,并且在进行检测分析时,还需对设备腔体内部建立相对真空的环境进行实验,进而减小实验环境对真空紫外波段内各谱线强度的削弱作用。然而即使在该条件下,P和S这两种元素在真空紫外波段的谱线灵敏度仍然较弱。为此为了实现真空紫外波段范围内的高灵敏度,本研究在距离像面前30 mm处位置设计了一个柱面镜聚焦系统。其采用了材料为CaF_(2)、中心厚度为5 mm以及弧矢面曲率半径为22.06 mm的柱面镜作为核心部件。并利用仿真软件Zemax对设计的光学系统进行仿真与优化,以及从非序列模式下的辐射照度仿真结果可知,柱面镜聚焦系统在几乎不影响分辨率的情况下对各波长成像灵敏度有较大的提升。最后以中低合金钢为检测样品,使用电火花激发光源对样品中各元素在紫外波段内的各谱线进行激发,进而验证光谱仪的各项性能:通过一次拟合、参比拟合以及二次拟合,建立每个元素谱峰强度和实际含量之间的数学模型,并算得各元素的拟合优度R^(2)均在0.99以上;柱面镜聚焦系统显著提高了设备在真空紫外波段的灵敏度,响应提高了1倍以上。实验结果表明,柱面镜聚焦系统的设计方法对于提升罗兰圆色散系统的灵敏度具有一定的参考价值。

关键词：紫外光谱罗兰圆光学系统柱面镜灵敏度拟合优度

Caution in building a Burgers circuit for studying secondary dislocations

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Journal of Materials Science & Technology 2019年第6期35卷 1192-1197页

作者： wen-Sheng Xu wen-Zheng Zhang Key Laboratory of Advanced Materials (MOE) School of Materials Science and EngineeringTsinghua University

As the Burgers vector of a secondary dislocation may not conform to the translation vectors in the periodic pattern in a high-resolution transmission electron microscope(HRTEM) image, a Burgers circuit directly constructed according to an HRTEM image may render a wrong Burgers vector. The HRTEM images of the habit plane(HP) of δ precipitate in an Inconel 718 alloy were re-examined by using different Burgers circuits, as an example. Evidence is found for predicted secondary dislocation associated with a down step. The Burgers vector of the dislocation is 1/6[112]/1/3[001]δ, determined with the Burgers circuit built on the reference of the displacement shift completely lattice(DSCL). It is consistent with both the calculated and the measured result of the major defects in the habit plane. Different Burgers vectors due to different Burgers circuits were explained quantitatively. The present study has a general implication for the determination of the Burgers vectors of secondary interfacial dislocations in other systems.

关键词： Dislocation Burgers vector Burgers circuit Coincidence site lattice (CSL) Displacement shift completely lattice (DSCL) Lattice correspondence

AN OPTIMAL METHOD FOR ADJUSTING THE CENTERINGPARAMETER IN THE WIDE-NEIGHBORHOOD PRIMAL-DUAL INTERIOR-POINT ALGORITHM FOR LINEAR PROGRAMMING

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Journal of Computational Mathematics 2004年第3期22卷 437-446页

作者： wen-baoAi DepartmentofMathematics BeijingUniversityofPostsandTelecommunicationsBeijing100876China

In this paper we present a dynamic optimal method for adjusting the centering parameter in the wide-neighborhood primal-dual interior-point algorithms for linear programming, while the centering pararheter is generally a constant in the classical wideneighborhood primal-dual interior-point algorithms. The computational results show that the new method is more efficient.

关键词： Linear programming Primal-dual interior point methods Wide-neighbourhood methods

试论服务我国人文社科自主知识体系构建的人文社科名词审定工作

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中国科技术语 2025年第1期27卷 20-27页

作者：温昌斌全国科学技术名词审定委员会北京100717

服务人文社科自主知识体系构建的人文社科名词审定工作,应在理论上和实践上进行创新。理论创新包括基础理论创新和应用理论创新。在基础理论创新方面,从“自主”角度划分了名词术语类型,并以此为工具,分析人文社科名词审定工作及其和构... 详细信息

服务人文社科自主知识体系构建的人文社科名词审定工作,应在理论上和实践上进行创新。理论创新包括基础理论创新和应用理论创新。在基础理论创新方面,从“自主”角度划分了名词术语类型,并以此为工具,分析人文社科名词审定工作及其和构建自主知识体系的关系。应用理论创新方面包括收词原则创新、定名原则创新、定义原则创新。实践创新是指创新审定、发布方式和引入人工智能。

关键词：人文社科名词审定自主知识体系

基于知识图谱可视化的三山五园学术领域知识分析

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北京联合大学学报 2025年第1期39卷 53-61页

作者：洪文董焱北京联合大学图书馆北京100101 北京联合大学应用文理学院北京100191

三山五园学术研究是北京文化特征与文脉传承研究的重要学术领域,自三山五园入选国家文物保护利用示范区以来,其研究深度和广度都得到了显著提升。利用知识图谱,在深入分析与解读三山五园学术研究现状的基础上,系统梳理并展示了领域研究... 详细信息

三山五园学术研究是北京文化特征与文脉传承研究的重要学术领域,自三山五园入选国家文物保护利用示范区以来,其研究深度和广度都得到了显著提升。利用知识图谱,在深入分析与解读三山五园学术研究现状的基础上,系统梳理并展示了领域研究的整体框架和脉络,明确揭示了研究的主要方向、热点及发展趋势,评估了研究者在该领域的学术水平和影响力,为推动三山五园的保护和利用提供了有力支持,也为领域学术研究向更深层次发展提供了参考依据。

关键词：三山五园知识图谱领域知识可视化分析

Polymer Features in Crystallization

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Chinese Journal of Polymer Science 2022年第6期40卷 545-555页

作者： wen-Bing Hu State Key Lab of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

This review firstly gives an overview on the importance of crystallization in natural and synthetic polymers/*** it introduces the typical features that have been raised by chain-like macromolecules in crystallization,including anisotropic interactions in the thermodynamic driving forces,chain folding in the crystal morphologies,chemical confinement in the copolymer crystallization,and mechanical enhancement in the stretching *** features separately cover the thermodynamics and the kinetics of polymer crystallization,as well as the crystallinity and the mechanical properties of semicrystalline *** review ends up with how these features enhance specific functions of crystalline polymers,which demonstrates polymer crystallization as a challenging yet promising field in the future.

关键词： Crystallization Macromolecules Property Function

Ground-0 Axioms *** Principles and Second Law:From the Geometry of Light and Logic of Photon to Mind-Light-Matter Unity-AI&QI

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IEEE/CAA Journal of Automatica Sinica 2021年第3期8卷 534-553页

作者： wen-Ran Zhang Department of Computer Science Georgia Southern UniversityStatesboroGA 30460 USA

Without the geometry of light and logic of photon,observer-observability forms a paradox in modern science,truthequilibrium finds no unification,and mind-light-matter unity is unreachable in ***,quantum mechanics has been shrouded with mysteries preventing itself from reaching definable causality for a general purpose analytical quantum computing ***-0 Axioms are introduced as an equilibrium-based,dynamic,bipolar set-theoretic unification of the first principles of science and the second law of *** literatures are critically reviewed to justify the self-evident nature of Ground-0 Axioms.A historical misinterpretation by the founding fathers of quantum mechanics is identified and *** disproves spacetime geometries(including but not limited to Euclidean and Hilbert spaces)as the geometries of light and truth-based logics(including but not limited to bra-ket quantum logic)as the logics of *** with logically definable causality and Dirac 3-polarizer experiment,bipolar quantum geometry(BQG)and bipolar dynamic logic(BDL)are identified as the geometry of light and the logic of photon,respectively,and wave-particle complementarity is shown less fundamental than bipolar *** a result,Ground-0 Axioms lead to a geometrical and logical illumination of the quantum and classical worlds as well as the physical and mental *** logical resolutions to the EPR and Schr?dinger’s cat paradoxes,an analytical quantum computing paradigm named quantum intelligence(QI)is *** is shown that QI makes mind-light-matter unity and quantum-digital compatibility logically reachable for quantumneuro-fuzzy AI-machinery with groundbreaking *** is contended that Ground-0 Axioms open a new era of science and philosophy—the era of mind-light-matter unity in which humanlevel white-box AI&QI is logically prompted to join Einstein’s grand unification to foster major scientific advances.

关键词： Analytical quantum computing bipolar fuzzy sets bipolar quantum agents business intelligence cognitive neuroscience dynamic equilibrium Einstein-Bohr debate information conservational computing/cryptography computational psychiatry international relations logically definable causality quantum intelligence quantum-neuro-fuzzy AI human level AI&QI quantum superposition/entanglement white-box brain model

Experimental Study on Geometry Characteristics of Turbulent Premixed Flames for Natural Gas/Air Mixtures

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Journal of Thermal Science 2025年第1期 268-282页

作者： ZHENG Weilin WANG Qijiao XIAO Huahua CHEN Xiaoxiao XIE Fan ZENG wen Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System Shenyang Aerospace University State Key Laboratory of Fire Science University of science and Technology of China AVIC Shenyang Aircraft Design and Research Institute

In this study,focusing on the geometry characteristics of spherical expanding flame,the turbulent premixed flames of natural gas/air mixtures were investigated in a fan-stirred turbulent *** effects of initial temperature（T=300-400 K）,initial pressure（P=0.1-0.3 MPa）,turbulence intensity（u'=1.0-2.7 m/s）,oxygen volumetric percentage(φ（O2）=15%-21%) and carbon dioxide volumetric percentage(φ（CO2）=0-20%)were delved *** flame profile under the Cartesian coordinate system was derived from the schlieren images taken by the high-speed ***,from both macroscopic and microscopic perspectives,the influence of experimental conditions on the flame geometry characteristics was explored through flame front extraction,wavelet decomposition and network *** results demonstrate that for significant flame wrinkling,changes in species concentrations and turbulence intensity have more pronounced effects on the flame wrinkling *** wrinkling of the flame front maintains a certain degree of similarity,as evidenced by the locally concentrated distribution of the angles of the maximum fluctuation *** disturbance energy under large-scale（D6-D8） disturbances exhibits relatively high values with a similar trend,exerting a significant impact on the geometry characteristics of the flame *** peaks of correlation degree are scattered either with the decomposition scale or the development of flame radius,indicating no linear correlation between different detail ***,the probability distribution of node degrees in key wrinkled regions exhibits different trends with that of large-scale wrinkling and disturbance energy,especially with changes in initial *** occurs because the number of key wrinkles varies based on the perturbation's strength or the region's ***,an increase in the fluctuation frequency of the flame's local radius may not necessarily lead to an increase in the number of key folded regions.

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高频超声下老年女性腓肠肌形态参数与身体活动能力的相关性分析

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中国组织工程研究 2025年第5期29卷 1058-1063页

作者：温子星徐欣朱胜群上海杉达学院国际医学技术学院上海市201209 上海师范大学天华学院健康学院上海市201815

背景:高频超声技术的应用为老年人骨骼肌形态的精准评估提供了有效工具,但获取的骨骼肌形态参数与身体活动能力之间的关联性尚不明确。目的:探究高频超声成像技术下老年女性腓肠肌形态学参数与身体活动能力的相关性,进而发现老年人身体... 详细信息

背景:高频超声技术的应用为老年人骨骼肌形态的精准评估提供了有效工具,但获取的骨骼肌形态参数与身体活动能力之间的关联性尚不明确。目的:探究高频超声成像技术下老年女性腓肠肌形态学参数与身体活动能力的相关性,进而发现老年人身体活动能力的有效预测指标。方法:于上海杉达学院周边社区招募年龄>60周岁,具有独立活动能力的老年女性受试者59例,采集受试者腓肠肌高频超声图像,获取相关参数:包括肌肉厚度、肌纤维长度、羽状角和肌纤维长度/肌肉厚度(fiber length/muscle thickness,Lf/Tm)指数;并进行身体活动能力测试:包括10 m步行、计时起立行走、30 s坐站和握力的测试,对各形态参数和身体活动能力测试指标进行相关性分析。结果与结论:①各骨骼肌形态参数间均存在显著相关性(P<0.05);②羽状角与10 m步行测试结果呈负相关(r=-0.35,P<0.05),与计时起立行走测试结果呈正相关(r=0.32,P<0.05);③Lf/Tm指数与10 m步行测试、握力测试结果呈正相关(r=0.39,P<0.01;r=0.30,P<0.05),与计时起立行走测试结果呈负相关(r=-0.32,P<0.05);④结果表明:腓肠肌羽状角和Lf/Tm指数与老年女性身体活动能力表现出了较好的相关性,可作为身体活动能力预测的有效指标。

关键词：老年女性高频成像身体活动能力骨骼肌形态 10 m步行 Lf/Tm指数