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太赫兹计量研究与标准研制进展

应用光学 2020年第4期41卷 651-661页

作者：邓玉强中国计量科学研究院光学所北京100029

太赫兹作为新的技术手段在物质成分识别、高速通信、生物医学、安检成像和军事国防等领域具有重要的作用。太赫兹技术的各种应用都建立在对太赫兹本身及其与物质相互作用测量的基础上,因此准确的太赫兹参数测量及相关量值溯源是太赫兹... 详细信息

太赫兹作为新的技术手段在物质成分识别、高速通信、生物医学、安检成像和军事国防等领域具有重要的作用。太赫兹技术的各种应用都建立在对太赫兹本身及其与物质相互作用测量的基础上,因此准确的太赫兹参数测量及相关量值溯源是太赫兹应用的技术支撑和保障。介绍中国计量科学研究院在太赫兹辐射参数计量标准研究中形成的测量技术和溯源方法、研制的测量仪器和测量装置、制定的计量校准法规和建立的计量标准装置,对太赫兹辐射时域、频域、空域和强度等参数给出了量值溯源传递图并进行了测量不确定度分析。提出的太赫兹计量方法和标准装置可保障太赫兹技术研究和应用中的量值可靠,也可为其他太赫兹参数的测量提供参考。

关键词：太赫兹计量太赫兹技术测量标准

Mass-spring model for elastic wave propagation in multilayered van der Waals metamaterials

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1107-1118页

作者： Yabin JING Lifeng WANG yuqiang GAO State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China

Multilayered van der Waals(vdW)materials have attracted increasing interest because of the manipulability of their superior optical,electrical,thermal,and mechanical properties.A mass-spring model(MSM)for elastic wave propagation in multilayered vdW metamaterials is reported in this *** dynamics(MD)simulations are adopted to simulate the propagation of elastic waves in multilayered vdW *** results show that the graphene/MoS_(2)metamaterials have an elastic wave bandgap in the terahertz *** MSM for the multilayered vdW metamaterials is proposed,and the numerical simulation results show that this model can well describe the dispersion and transmission characteristics of the multilayered vdW *** MSM can predict elastic wave transmission characteristics in multilayered vdW metamaterials stacked with different two-dimensional(2D)*** results presented in this paper offer theoretical help for the vibration reduction of multilayered vdW semiconductors.

关键词： multilayered van der Waals(vd W)metamaterial molecular dynamics(MD) mass-spring model(MSM) dispersion relation transmission characteristic

Breaking the optical efficiency limit of virtual reality with a nonreciprocal polarization rotator

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Opto-Electronic Advances 2024年第3期7卷 4-14页

作者： yuqiang Ding Zhenyi Luo Garimagai Borjigin Shin-Tson Wu College of Optics and Photonics University of Central FloridaOrlando FL 32816USA Department of Intelligent Interaction Technologies University of TsukubaTsukubaIbaraki 305-8573Japan Research Fellow of Japan Society for the Promotion of Science Chiyoda-kuTokyo 102-0083Japan

A catadioptric lens structure,also known as pancake lens,has been widely used in virtual reality(VR)displays to reduce the ***,the utilization of a half mirror(HM)to fold the optical path thrice leads to a significant optical *** theoretical maximum optical efficiency is merely 25%.To transcend this optical efficiency constraint while retaining the foldable characteristic inherent to traditional pancake optics,in this paper,we propose a theoretically lossless folded optical system to replace the HM with a nonreciprocal polarization *** our feasibility demonstration experiment,we used a commercial Faraday rotator(FR)and reflective polarizers to replace the lossy *** theoretically predicted 100%efficiency can be achieved approximately by using two high-extinction-ratio reflective *** addition,we evaluated the ghost images using a micro-OLED panel in our imaging ***,the ghost images can be suppressed to undetectable level if the optics are with antireflection *** novel pancake optical system holds great potential for revolutionizing next-generation VR displays with lightweight,compact formfactor,and low power consumption.

关键词： near-eye display virtual reality pancake optics folded optics nonreciprocal polarization rotator

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基于频率梳的太赫兹频率精密测量方法研究

光学学报 2016年第4期36卷 133-138页

作者：孙青杨奕孟飞邓玉强中国计量科学研究院光学与激光计量科学研究所北京100029 中国石油大学(北京)油气光学探测技术北京市重点实验室北京102249 中国计量科学研究院时间频率计量研究所北京100029

利用光纤飞秒激光器与光纤耦合型太赫兹光电导天线,构建了一套全光纤太赫兹频率梳系统。基于锁相技术实现了对频率梳重复频率信号的高稳定度锁定,在取样时间为100 s时锁定精度达到3.3×10-13,并获得了信噪比优于50 d B的太赫兹拍频信号... 详细信息

利用光纤飞秒激光器与光纤耦合型太赫兹光电导天线,构建了一套全光纤太赫兹频率梳系统。基于锁相技术实现了对频率梳重复频率信号的高稳定度锁定,在取样时间为100 s时锁定精度达到3.3×10-13,并获得了信噪比优于50 d B的太赫兹拍频信号。基于频率梳测试方法实现了太赫兹频率的高精度测量,测量不确定度为5×10^(-11)。

关键词：测量太赫兹频率梳频率计量锁相技术

Allosteric DNAzyme-based encoder for molecular information transfer

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Chinese Chemical Letters 2024年第7期35卷 235-241页

作者： Minghao Hu Tianci Xie yuqiang Hu Longjie Li Ting Wang Tongbo Wu School of Pharmacy Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Oncology Tongji Hospital of Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China GI Cancer Research Institute Tongji HospitalHuazhong University of Science and TechnologyWuhan 430030China School of Life Science and Technology Wuhan Polytechnic UniversityWuhan 430023China State Key Laboratory of Bioelectronics National Demonstration Center for Experimental Biomedical Engineering EducationSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China

Dynamic DNA nanotechnology plays a significant role in nanomedicine and information science due to its high programmability based on Watson-Crick base pairing and nanoscale *** DNA machines and networks have been widely used in various fields,including molecular imaging,biosensors,drug delivery,information processing,and logic *** serve as crucial components for information compilation and transfer,allowing the conversion of information from diverse application scenarios into a format recognized and applied by DNA ***,there are only a few encoder designs with DNA ***,the molecular priority encoder is hardly *** this study,we introduce allosteric DNAzyme-based encoders for information *** design of the allosteric domain and the recognition arm allows the input and output to be independent of each other and freely *** pre-packaged mode design achieves uniformity of baseline dynamics and dynamics *** also integrated non-nucleic acid molecules into the encoder through the aptamer design of the allosteric ***,we developed the 2^(n)-n encoder and the EndoⅣ-assisted priority encoder inspired by immunoglobulin's molecular structure and effector *** our knowledge,the proposed encoder is the first enzyme-free DNA encoder with DNA output,and the priority encoder is the first molecular priority encoder in the DNA reaction *** encoders avoid complex operations on a single molecule,and their simple structure facilitates their application in complex DNA circuits and biological scenarios.

关键词： DNAzyme Encoder Nucleic acids DNA circuit DNA strand displacement Dynamic DNA nanotechnology

不同运动模式对青少年糖耐量和胰岛素敏感性的影响

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中国学校卫生 2020年第3期41卷 401-404页

作者：龚风华邓玉强南通大学体育科学学院江苏226019 南通大学儿童青少年运动与健康促进研究中心

目的比较相等能量消耗的高强度间歇性运动和中等强度持续性运动对健康青少年糖耐量和胰岛素敏感性的影响。为制定维持与增进青少年健康水平的合理运动干预方案提供参考。方法通过现场宣讲的方式在南通市某中学纳入13名被试,分为安静对照... 详细信息

目的比较相等能量消耗的高强度间歇性运动和中等强度持续性运动对健康青少年糖耐量和胰岛素敏感性的影响。为制定维持与增进青少年健康水平的合理运动干预方案提供参考。方法通过现场宣讲的方式在南通市某中学纳入13名被试,分为安静对照组(C)、中等强度持续性运动组(MICE)和高强度间歇性运动组(HIIE)后进行口服葡萄糖耐量试验,并计算胰岛素敏感指数、葡萄糖和胰岛素的总曲线下面积(t AUC)、曲线下面积增量(i AUC)。结果与C组相比,MICE组和HIIE组葡萄糖t AUC值分别下降了5.99%(ES=-0.75)和9.32%(ES=-0.86)(P0.05)和4.72%(ES=0.25,P<0.01),MICE组和HIIE组间差异无统计学意义(ES=0.04,P<0.05)。结论高强度间歇性运动对健康青少年血糖、胰岛素和胰岛素敏感性的干预效应优于中等强度持续性运动。

关键词：运动活动糖耐量胰岛素青少年干预性研究

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太赫兹辐射功率计量研究进展与国际比对

中国激光 2017年第3期44卷 270-278页

作者：邓玉强孙青于靖徐楠林延东中国计量科学研究院光学与激光计量科学研究所北京100029

太赫兹技术的重要应用急需准确的太赫兹辐射功率计量作为支撑和保障,国际计量局组织开展了国际首次太赫兹辐射功率测量比对。为实现太赫兹辐射功率准确测量,保障我国太赫兹功率计量取得国际等效互认,报导了全吸收型太赫兹辐射功率计,对... 详细信息

太赫兹技术的重要应用急需准确的太赫兹辐射功率计量作为支撑和保障,国际计量局组织开展了国际首次太赫兹辐射功率测量比对。为实现太赫兹辐射功率准确测量,保障我国太赫兹功率计量取得国际等效互认,报导了全吸收型太赫兹辐射功率计,对太赫兹辐射功率计的计量性能和测量不确定度进行详细分析和实验测试。利用一种具有镜反射的太赫兹辐射计,对全吸收型太赫兹辐射计的计量性能进行实验验证,保障了太赫兹辐射功率计响应度量值的准确性和不确定度分析的合理性。利用自主研制的太赫兹辐射计参加国际首次太赫兹功率比对,取得了国际等效一致。

关键词：测量辐射计量远红外和太赫兹光学标准与测试太赫兹光谱学

Unlocking efficient energy storage via regulating ion and electron-active subunits:an(SbS)_(1.15)TiS_(2)superlattice for large and fast Na^(+)storage

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Science China Chemistry 2024年第1期67卷 336-342页

作者： Baixin Peng Tianxun Cai Shaoning Zhang yuqiang Fang Zhuoran Lv Yusha Gao Fuqiang Huang State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 200031China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Alloying-type metal sulfides with high sodiation activity and theoretical capacity are promising anode materials for high energy density sodium ion ***,the large volume change and the migratory and aggregation behavior of metal atoms will cause severe capacity decay during the charge/discharge ***,a robust and conductive TiS_(2)framework is integrated with a high-capacity SbS layer to construct a single phase(SbS)_(1.15)TiS_(2)superlattice for both high-capacity and fast Na^(+)*** metallic TiS_(2)sublayer with high electron activity acts as a robust and conductive skeleton to buffer the volume expansion caused by conversion and alloying reaction between Na+and SbS ***,high capacity and high rate capability can be synergistically realized in a single phase(SbS)_(1.15)TiS_(2)*** novel(SbS)_(1.15)TiS_(2)anode has a high charge capacity of 618 mAh g^(-1)at 0.2 C and superior rate performance and cycling stability(205 mAh g^(-1)at 35 C after 2,000 cycles).Furthermore,in situ and ex situ characterizations are applied to get an insight into the multi-step reaction *** integrity of robust Na-Ti-S skeleton during(dis)charge process can be *** superlattice construction idea to integrate the Na^(+)-active unit and electron-active unit would provide a new avenue for exploring high-performance anode materials for advanced sodium-ion batteries.

关键词： (SbS)_(1.15)TiS_(2) sulfides sodium ion battery superlattice fast-charging

Analysis and Assessment on the Health State of International Travellers——An analysis on results of disease surveillance examination of persons entering or leaving the territory via Guangdong ports from 1987 to 1995

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旅行医学科学 1996年第4期2卷 148-151,155页

作者： Lu Zhiping Zheng yuqiang deng Jing Zhou Jianhua Guangdong Health and Quarantine Bureau, P. R. China

The results of disease surveillance examination of persons entering or leaving the territory via ports in Guangdong province from 1987 to 1995 were collected and the relatively complete data were chosen for statistical analysis in this paper. 4,110,187 examination items were completed from 647,987 persons entering or leaving the territory, 88,522 persons suffering from diseases or being antigen positive have been found and the total detected rate was 2.15%. The detected rates of sexual transmitted diseases such as AIDS, syphilis, gonorrhea are higher in persons from outside the territory than in persons from the interior, 0.10%, 0.25% and 0.30% respectively for the formers and 0.01%, 0.07% and 0.04% respectively for the latters; nevertheless, the detected rate of pulmonary tuberculosis in persons from the interior was higher than that in persons from outside the territory, 0.08% for the former, 0.03% for the latter. The authors discussed the examination results and pointed out that it was of great importance to strengthen the surveillance of sexual transmitted diseases in presons from outside the territory and the tuberculosis surveillance and control in persons from the interior. Once the pulmonary TB cases were found they should be put under strict chemotherapeutic menagement. Attention should also be paid to the detection of malignant tumors in early stage during physical examination, which may contribute to the easly radical cure of malignant tumor and the improvement of people’s health level.

关键词： traveller heath condition diseases surveillance