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Chinese Physics B 2024年第9期33卷 200-206页

作者： yaoyuan wang Long You Kai Chang Hongxin Yang School of Integrated Circuits Huazhong University of Science and TechnologyWuhan 430074China Center for Quantum Matter School of PhysicsZhejiang UniversityHangzhou 310058China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518000China

Topological magnetism with strong robustness,nanoscale dimensions and ultralow driving current density(106 A/m^(2))is promising for applications in information sensing,storage,and processing,and thus sparking widespread research *** candidate material systems with nanoscale size and easily tunable properties is a key for realizing practical topological magnetism-based spintronic ***,we propose a class of ultrathin heterostructures,Fe/Bi_(2)O_(2)X(X=S,Se,Te)by deposing metal Fe on quasi-two-dimensional(2D)bismuth oxychalcogenides Bi_(2)O_(2)X(X=S,Se,Te)with excellent ferroelectric/ferroelastic *** Dzyaloshinskii–Moriya interaction(DMI)and topological magnetism can be *** atomistic spin dynamics simulations demonstrate that field-free vortex–antivortex loops and sub-10 nm skyrmions exist in Fe/Bi_(2)O_(2)S and Fe/Bi_(2)O_(2)Se interfaces,*** results provide a possible strategy to tailor topological magnetism in ultrathin magnets/2D materials interfaces,which is extremely vital for spintronics applications.

关键词： Dzyaloshinskii–Moriya interaction field-free topological magnetism

Reconfigurable physical unclonable cryptographic primitives based on current-induced nanomagnets switching

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Science China(Information Sciences) 2022年第2期65卷 188-196页

作者： Shuai ZHANG Jian ZHANG Shihao LI yaoyuan wang Zhenjiang CHEN Jeongmin HONG Long YOU Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and Technology

Hardware security primitives that preserve secrets are playing a crucial role in the Internet-ofThings(Io T) era. Existing physical unclonable function(PUF) instantiations, exploiting static randomness,generate challenge-response pairings(CRPs) to produce unique security keys that can be used to authenticate devices linked to the Io T. Reconfigurable PUFs(RPUFs) with dynamically refreshable CRPs can enhance the security and robustness of conventional PUFs. The in-plane current-driven perpendicular polarized nanomagnet switching via spin-orbit torque(SOT) possesses great potential for application to memory and logic, as the write-current path is separate from the read-current path, which naturally resolves the write-read interference. However, the stochastic switching of perpendicular magnetization, without an additional symmetry-breaking field, would significantly hinder the technological viability of commercial implementations. Here, we report an initialization-free physical RPUF implemented by SOT-induced stochastic switching of perpendicularly magnetized Ta/Co Fe B/Mg O nanodevices. Using a 15×15 nanomagnet array, we experimentally demonstrate a security primitive that offers a near-ideal 50% uniqueness over 100 reconfiguration cycles, as well as a low correlation coefficient between every two reconfiguration cycles. Our results show that current-induced nanomagnets switching paves the way for developing highly reliable and energy-efficient reconfigurable cryptographic primitives with a smaller footprint.

关键词： reconfigurable physical unclonable function spin-orbit torque cryptographic primitive spintronics nanomagnet

Study of the spatial growth of stimulated Brillouin scattering in a gas-filled hohlraum via detecting the driven ion acoustic wave

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Matter and Radiation at Extremes 2024年第2期9卷 36-49页

作者： Chaoxin Chen Tao Gong Zhichao Li Liang Hao Yonggang Liu Xiangming Liu Hang Zhao yaoyuan Liu Kaiqiang Pan Qi Li Sanwei Li Zhijun Li Sai Jin Feng wang Dong Yang Laser Fusion Research Center China Academy of Engineering PhysicsMianyangSichuan 621900People’s Republic of China Institute of Applied Physics and Computational Mathematics Beijing 100094People’s Republic of China

In an experiment performed on the Shenguang-III prototype laser facility, collective Thomson scattering (TS) is used to study the spatialgrowth of stimulated Brillouin scattering (SBS) in a gas-filled hohlraum by detecting the SBS-driven ion acoustic wave. High-quality timeresolved SBS and TS spectra are obtained simultaneously in the experiment, and these are analyzed by a steady-state code based on theray-tracing model. The analysis indicates that ion–ion collisions may play an important role in suppressing SBS growth in the Au plasma;as aresult, the SBS excited in the filled gas region is dominant. In the early phase of the laser pulse, SBS originates primarily from the high-densityplasma at the edges of the interaction beam channel, which is piled up by the heating of the interaction beam. Throughout the duration of thelaser pulse, the presence of the TS probe beam might mitigate SBS by perturbing the density distribution around the region overlapping withthe interaction beam.

关键词： scattering filled Brillouin

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量测方程中含有参向量的缺初始值的递推估计

控制理论与应用 1987年第4期 82-89页

作者：汪咬元中国科学院武汉数学物理研究所

本文讨论了量测方程中含有参向量、系统的初始状态统计特征未知、且系统噪声同量测噪声相关时的线性离散时间系统,得到了系统状态(包括初始状态)、参向量的最小均方误差线性无偏估计量的递推估计公式。

关键词：向量递推估计量测方程统计特征初始状态线性离散时间系统初始值

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含大气孔缺陷的药柱结构分析与试验验证

弹箭与制导学报 2022年第5期42卷 73-77页

作者：吴敏谢杨林余剑王志昊汪耀源李云峰湖北航天化学技术研究所湖北襄阳441003

针对固体火箭发动机装药中含有大气孔(Φ20~Φ40 mm)缺陷会导致产品报废的质量问题,为节省生产成本、周期以及验证大气孔装药的技术风险,建立含大气孔的三维药柱模型,分别开展了药柱在低温载荷、点火升压及共同作用下的结构完整性分析... 详细信息

针对固体火箭发动机装药中含有大气孔(Φ20~Φ40 mm)缺陷会导致产品报废的质量问题,为节省生产成本、周期以及验证大气孔装药的技术风险,建立含大气孔的三维药柱模型,分别开展了药柱在低温载荷、点火升压及共同作用下的结构完整性分析、燃面变化的理论计算,并开展发动机地面点火验证试验。理论分析与验证结果表明,大气孔周围存在一定幅度的应力集中现象,但在低温、点火升压过程中并未出现从气孔处产生裂纹等影响产品安全性的问题;4发含大气孔的发动机均通过高工作压强的高温与低温点火考核试验,并与装药无气孔缺陷的发动机的点火试验曲线进行比较,点火验证考核结果及与正常药柱的试验曲线对比分析均充分表明,即使有大气孔(Φ20~Φ40 mm)的装药也可满足复杂的实际使用工况要求。该试验结果对其它产品的同类问题有较大的实用参考价值。

关键词：固体火箭发动机药柱大气孔结构完整性

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父亲的缺位——论《阿卡迪亚》中的知识逻辑与性别秩序

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广东外语外贸大学学报 2024年第4期35卷 88-97页

作者：胡耀元王岚上海外国语大学英语学院

在当代英国剧作家汤姆·斯托帕德所著《阿卡迪亚》中,贵族家庭里父亲的缺席和学术场域中权威的消解具有某种相似性,不仅表明传统父权秩序走向了崩塌,更体现出以颠覆与重述为核心的知识逻辑。这种知识逻辑贯穿剧中人物对知识的追寻、认... 详细信息

在当代英国剧作家汤姆·斯托帕德所著《阿卡迪亚》中,贵族家庭里父亲的缺席和学术场域中权威的消解具有某种相似性,不仅表明传统父权秩序走向了崩塌,更体现出以颠覆与重述为核心的知识逻辑。这种知识逻辑贯穿剧中人物对知识的追寻、认知与重构,其背后则是理性与感性以及人文与科学的结合。首先,生活在19世纪英国的贵族小姐托马西娜具有罕见的科学禀赋,亦怀揣热情与爱,拒绝接受传统性别角色。其次,以汉娜为代表的20世纪当代学者致力于挖掘尘封的历史,坚信在权威论断和主流观点之外,其实另有真相。最后,剧中的一众知识青年慢慢发觉,无论是盲目崇拜理性与逻辑,还是完全遵从自身激情与想象,都会导致对真实的扭曲和对学术事业的破坏,其经历揭示知识霸权的本质在于拒绝多元与差异,固守自封。随着情节发展,对立与冲突被化解,原有秩序下中心与边缘的二元对立消融。通过对比、再现发生在古今不同时空西德利庄园中的故事,斯托帕德构想了一个理性与感性有机结合、古典主义与浪漫主义交融碰撞的图景,指出在知识追寻与生产过程中,人们需要避免急功近利的学术浮夸,努力消除性别对立与学术霸权,以还原女性被父权话语遮蔽的才华,消解依仗传统权力话语关系的逻各斯中心话语体系。

关键词：汤姆·斯托帕德《阿卡迪亚》知识逻辑性别秩序父权制

Atomic transport dynamics in crossed optical dipole trap

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Chinese Physics B 2024年第7期33卷 293-301页

作者：彭鹏张正熙樊耀塬殷国玲毛德凯陈徐宗熊炜周小计 State Key Laboratory of Advanced Optical Communication System and Network School of ElectronicsPeking UniversityBeijing 100871China Institute of Carbon-based Thin Film Electronics Peking UniversityTaiyuan 030012China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China

We study the dynamical evolution of cold atoms in crossed optical dipole trap theoretically and experimentally. The atomic transport process is accompanied by two competitive kinds of physical mechanics, atomic loading and atomic *** loading process normally is negligible in the evaporative cooling experiment on the ground, while it is significant in preparation of ultra-cold atoms in the space station. Normally, the atomic loading process is much weaker than the atomic loss process, and the atomic number in the central region of the trap decreases monotonically, as reported in previous research. However, when the atomic loading process is comparable to the atomic loss process, the atomic number in the central region of the trap will initially increase to a maximum value and then slowly decrease, and we have observed the phenomenon first. The increase of atomic number in the central region of the trap shows the presence of the loading process, and this will be significant especially under microgravity conditions. We build a theoretical model to analyze the competitive relationship, which coincides with the experimental results well. Furthermore, we have also given the predicted evolutionary behaviors under different conditions. This research provides a solid foundation for further understanding of the atomic transport process in traps. The analysis of loading process is of significant importance for preparation of ultra-cold atoms in a crossed optical dipole trap under microgravity conditions.

关键词： cold atom crossed optical dipole trap transport process

边疆乡村生态旅游绿道选线研究——以黑河市坤河达斡尔族满族乡为例

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中国园林 2024年第3期40卷 101-107页

作者：张耀元林墨飞大连理工大学建筑与艺术学院大连116024

为促进乡村经济繁荣、巩固边疆生态安全屏障,尝试将边疆乡村生态旅游与绿道概念结合,构建边疆乡村生态旅游绿道体系,而绿道的规划选线是乡村生态旅游绿道建设的关键。为探究边疆乡村生态旅游绿道选线的内在机制,在研究有关乡村生态旅游... 详细信息

为促进乡村经济繁荣、巩固边疆生态安全屏障,尝试将边疆乡村生态旅游与绿道概念结合,构建边疆乡村生态旅游绿道体系,而绿道的规划选线是乡村生态旅游绿道建设的关键。为探究边疆乡村生态旅游绿道选线的内在机制,在研究有关乡村生态旅游绿道文献和场地调研的基础上,提出了坤河达斡尔族满族乡生态旅游绿道的构建模式,并在Yaahp、GIS软件的辅助下,选取生态旅游适宜性、景观游憩适宜性和绿道资源适宜性作为选线要素,进而确定选线因子。利用层次分析法(AHP)、德尔菲法(Delphi)和模糊层次分析法(FAHP)构建乡村生态旅游绿道适宜性评价模型,并借助ArcGIS平台计算选线方案,对绿道选线进行修正和优化。研究发现:1)最适宜新建的生态旅游景观节点是异域风情观赏点;2)绿道适宜在已有道路两旁建设;3)边疆乡村生态旅游绿道选线应遵循最小路径成本、线路闭合性和体系化原则。

关键词：风景园林边疆乡村生态旅游绿道选线适宜性评价黑河市坤河达斡尔族满族乡

悬吊多质量摆体系力学机理及减振性能试验研究

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振动与冲击 2024年第6期43卷 50-63页

作者：孙澔鼎何浩祥程扬张耀源曹青北京工业大学工程抗震与结构诊治北京市重点实验室北京100124

传统悬吊质量摆有悬吊单摆、串联式悬吊多摆和并联式悬吊多摆,这几种类型摆构造简单、机理明确,但调谐频带较窄,应用在低频率超高层结构下摆长过长、高频率高层结构下摆长过短,限制其在实际工程中的应用。为此,提出装有弹簧的串、并联... 详细信息

传统悬吊质量摆有悬吊单摆、串联式悬吊多摆和并联式悬吊多摆,这几种类型摆构造简单、机理明确,但调谐频带较窄,应用在低频率超高层结构下摆长过长、高频率高层结构下摆长过短,限制其在实际工程中的应用。为此,提出装有弹簧的串、并联式悬吊多摆结构,建立装有串、并联式悬吊多摆的结构体系动力学方程。为研究这两类悬吊摆的减振性能,通过数值模拟对比分析传统悬吊质量摆与装有弹簧的串、并联悬吊摆对受控结构的减振效果,并对受控结构与非受控结构进行一系列振动台试验,验证悬吊单摆、悬吊串、并联式无弹簧双摆、悬吊串、并联式弹簧双摆在传统地震动下以及四类场地地震动作用下对被控结构减振控制的有效性。数值模拟与振动台试验结果均表明,装有弹簧的串联式悬吊多摆减振效果最优,其具有增大调谐频带、实现多阶振型控制、灵活调节摆长的优点,适用于工程实际中。

关键词：调谐减振悬吊质量摆多摆多高层结构振动台试验结构控制

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论半水煤气气柜的爆炸

青海师范大学学报(自然科学版) 1988年第1期 20-29页

作者：胡耀元吕延嘉王建朝青海师范大学化学系

本文探讨了半水煤气～空气混合气体的爆炸条件、反应机理,报导了各种煤气～空气混合气体的爆炸范围的试验结果,并阐明了在同等情况下,半水煤气气柜较易爆炸的原因,提出了预防发生半水煤气气柜爆炸事故的措施意见。

关键词：半水煤气支链反应反应机理煤炸范围扩散化学方程静电积聚