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Dual-symmetry-perturbed all-dielectric resonant metasurfaces for high-Q perfect light absorption

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Chinese Optics Letters 2024年第2期22卷 200-206页

作者：葛俊洋高一骁徐雷周宁沈祥 Laboratory of Infrared Materials and Devices Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province Ningbo 315211China Advanced Optics&Photonics Laboratory Department of EngineeringSchool of Science and TechnologyNottingham Trent UniversityNottingham NG118NSUK School of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Ningbo Institute of Oceanography Ningbo 315832China

We demonstrate a high-Q perfect light absorber based on all-dielectric doubly-resonant *** bound states in the continuum(BICs)protected by different symmetries,we manage to independently manipulate the Q factors of the two degenerate quasi-BICs through dual-symmetry perturbations,achieving precise matching of the radiative and nonradiative Q factors for degenerate critical *** achieve a narrowband light absorption with a>600 Q factor and a>99%absorptance atλ_(0)=1550 nm on an asymmetric germanium metasurface with a 0.2λ_(0)*** work provides a new strategy for engineering multiresonant metasurfaces for narrowband light absorption and nonlinear applications.

关键词： resonant metasurface perfect light absorption bound states in the continuum

基于Android和Arduino的蓝牙考勤系统实现

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信息通信 2016年第4期29卷 109-110页

作者：葛艺潇闵富红华中科技大学自动化学院湖北武汉430074 南京师范大学电气与自动化学院江苏南京210042

针对传统考勤机对放置地点的限制以及LBS基站定位在室内的不可应用性,提出了一种利用蓝牙低能耗技术的新型移动考勤系统。该系统采用配备CC2540蓝牙模块的Arduino uno单片机构成蓝牙广播基站,进行室内精确定位,同时使用Android系统移动... 详细信息

针对传统考勤机对放置地点的限制以及LBS基站定位在室内的不可应用性,提出了一种利用蓝牙低能耗技术的新型移动考勤系统。该系统采用配备CC2540蓝牙模块的Arduino uno单片机构成蓝牙广播基站,进行室内精确定位,同时使用Android系统移动设备接收广播并上传考勤信息。设计的考勤系统具有建设成本低、实用性强和精确性高的特点。

关键词：蓝牙BLE技术考勤系统 Arduino uno Android

黑龙江水域5个群体翘嘴鲌肌肉质构及营养成分比较分析

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大连海洋大学学报 2022年第6期37卷 977-984页

作者：葛一笑邹昊博夏邦华邹宇宁周群陈思淼杨宇关陶韩英东北农业大学动物科学技术学院黑龙江哈尔滨150030 中牧实业股份有限公司北京100070

为探究黑龙江水域不同群体翘嘴鲌Culter alburnus的肌肉质构特征及营养成分差异,对黑龙江(HLR)、乌苏里江(WSR)、松花江(SHR)和兴凯湖(XKL)4个翘嘴鲌野生群体及兴凯湖翘嘴鲌养殖群体(XKY)的基本营养成分、氨基酸、脂肪酸和质构等指标进... 详细信息

为探究黑龙江水域不同群体翘嘴鲌Culter alburnus的肌肉质构特征及营养成分差异,对黑龙江(HLR)、乌苏里江(WSR)、松花江(SHR)和兴凯湖(XKL)4个翘嘴鲌野生群体及兴凯湖翘嘴鲌养殖群体(XKY)的基本营养成分、氨基酸、脂肪酸和质构等指标进行了测定分析。结果表明:兴凯湖野生群体肌肉弹性和黏性显著高于其他群体(P<0.05),兴凯湖养殖群体肌肉硬度显著低于其他群体(P<0.05);兴凯湖野生群体、兴凯湖养殖群体和松花江群体肌肉粗蛋白质含量显著高于黑龙江群体和乌苏里江群体(P<0.05);5个群体肌肉中所含氨基酸种类相同,但含量有一定差异;兴凯湖野生群体和养殖群体肌肉的氨基酸总量、必需氨基酸和鲜味氨基酸含量均显著高于其他群体(P<0.05);兴凯湖野生群体和养殖群体的饱和脂肪酸含量显著低于其他群体(P<0.05),而多不饱和脂肪酸含量则显著高于其他群体(P<0.05)。研究表明,黑龙江水域5个翘嘴鲌群体均具有良好的肌肉品质和营养组成,是营养价值较高的优质鱼类,其中兴凯湖野生群体表现最佳,具有更高的食用价值和开发利用前景。

关键词：翘嘴鲌黑龙江质构营养组成

Cryo-EM structure of Mycobacterium smegmatis ribosome reveals two unidentified ribosomal proteins close to the functional centers

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Protein & Cell 2018年第4期9卷 384-388页

作者： Zhifei Li Xueliang ge yixiao Zhang Lvqin Zheng Suparna Sanyal Ning Gao State Key Laboratory of Membrane Biology Peking-Tsinghua Joint Center for Life Sciences School of Life Sciences PekingUniversity Beijing 100871 China Beijing Advanced Innovation Center for Structural Biology Tsinghua-Peking Joint Center for Life Sciences School of Life Sciences Tsinghua University Beijing 100084 China Department of Cell and Molecular Biology Uppsala UniversityBMC Box-596 Uppsala Sweden

Dear Editor, Mycobacterium smegmatis is commonly used as a labora- tory surrogate in studying the physiology and pathogenesis of disease-causing mycobacteria, including Mycobacterium tuberculosis, which causes tubercu... 详细信息

关键词： 70S RIBOSOME RNA

A binding-block ion selective mechanism revealed by a Na/K selective channel

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Protein & Cell 2018年第7期9卷 629-639页

作者： Jie Yu Bing Zhang yixiao Zhang Cong-qiao Xu Wei Zhuo Jingpeng ge Jun Li Ning Gao Yang Li Maojun-Yang Ministry of Education Key Laboratory of Protein Science School of Life Sciences Tsinghua-Peking Joint Center for Life Sciences Beijing Advanced Innovation Center for Structural Biology Tsinghua University Beijing 100084 China Key Laboratory of Receptor Research Shanghai Institute of Mat-eria Medica Chinese Aca(~emy of Sciences Shanghai 201203 China Department of Chemistry and Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Tsinghua University Beijing 100084 China University of Chinese Academy of Sciences Beijing 100049 China Anesthesiology Shanghai First Maternity and Infant-Hospital Tongji University school of Medicine Shanghai 201203 China

Mechanosensitive （MS） channels are extensively stud- ied membrane protein for maintaining intracellular homeostasis through translocating solutes and ions across the membrane, but its mechanisms of channel gating and ion selectivity are largely unknown. Here, we identified the Ynal channel as the Na^＋/K^＋ cation-selec- tive MS channel and solved its structure at 3.8 A by cryo- EM single-particle method. Ynal exhibits low conduc- tance among the family of MS channels in E. coil, and shares a similar overall heptamer structure fold with previously studied MscS channels. By combining structural based mutagenesis, quantum mechanical and electrophysiological characterizations, we revealed that ion selective filter formed by seven hydrophobic methionine （Ynal^Met158） in the transmembrane pore determined ion selectivity, and both ion selectivity and gating of Ynal channel were affected by accompanying anions in solution. Further quantum simulation and functional validation support that the distinct binding energies with various anions to Ynal^Met158 facilitate Na^＋/K^＋ pass through, which was defined as binding-block mechanism. Our structural and functional studies provided a new perspective for understanding the mechanism of how MS channels select ions driven by mechanical force.

关键词： cryo-EM MscS Na^+/K^+ selective channel

Design and fabrication of geAsSeS chalcogenide waveguides with thermal annealing

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Chinese Physics B 2021年第3期30卷 320-325页

作者： Limeng Zhang Jinbo Chen Jierong Gu yixiao Gao Xiang Shen Yimin Chen Tiefeng Xu Laboratory of Infrared Materials and Devices&Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province Research Institute of Advanced TechnologyNingbo UniversityNingbo 315211China Ningbo Institute of Oceanography Ningbo 315832China Department of Microelectronic Science and Engineering School of Physical Science and TechnologyNingbo UniversityNingbo 315211China

We reported a chalcogenide glass-based rib waveguide fabricated using photolithography and dry etching method. A commercial software(COMSOL Multiphysics) was used to optimize the waveguide structure and the distribution of the fundamental modes in the waveguide based on the complete vector finite component. We further employed thermal annealing to optimize the surface and sidewalls of the rib waveguides. It was found that the optimal annealing temperature for ge As Se S films is 220℃, and the roughness of the films could be significantly reduced by annealing. The zero-dispersion wavelength(ZDW) could be shifted to a short wavelength around ~2.1 μm via waveguide structural optimization, which promotes supercontinuum generation with a short wavelength pump laser source. The insertion loss of the waveguides with cross-sectional areas of 4.0 μm×3.5 μm and 6.0 μm×3.5 μm was measured using lens fiber and the cut-back method. The propagation loss of the 220℃ annealed waveguides could be as low as 1.9 d B/cm at 1550 nm.

关键词： chalcogenide film dispersion engineering optical waveguide thermal annealing

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过温保护层合纳米纤维隔膜的制备及其性能

纺织学报 2018年第7期39卷 21-26页

作者：吴小娟余妙晶舒慧郑怡筱葛烨倩绍兴文理学院纺织服装学院浙江绍兴312000

为克服现有隔膜材料孔隙率低、耐热性能差的缺点,采用静电纺丝技术,以耐高温性能较好的聚丙烯腈(PAN)和力学性能较好的聚偏氟乙烯(PVDF)为原料,通过多针头、滚筒接收装置成功制备了具有较高孔隙率和热稳定性等优点的PAN/PVDF/PAN层合纳... 详细信息

为克服现有隔膜材料孔隙率低、耐热性能差的缺点,采用静电纺丝技术,以耐高温性能较好的聚丙烯腈(PAN)和力学性能较好的聚偏氟乙烯(PVDF)为原料,通过多针头、滚筒接收装置成功制备了具有较高孔隙率和热稳定性等优点的PAN/PVDF/PAN层合纳米纤维隔膜材料,并对得到的3种不同厚度比的纳米纤维复合膜结构与性能进行了测试,探究了聚丙烯腈和聚偏氟乙烯不同厚度比例对纳米纤维膜性能的影响,同时对材料的过温保护功能进行了分析。结果表明,制备的复合纳米纤维隔膜具有75.42%的孔隙率,在160℃内能保持尺寸稳定,并且超过160℃具有过温保护功能。

关键词：聚偏氟乙烯聚丙烯腈静电纺丝隔膜过温保护纳米纤维

(EC+β+) Decay of 153Er and 157Yb

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IMP & HIRFL Annual Report 1994年 24-25页

作者： Xu Shuwei Xie Yuanxiang Pan Qiangyan Zhang Juping Zhang Xueqian Wang Yihao ge Yuanxiu Yin Xijin Wang Chunfang Luo yixiao Zhang Tianmei Liu Zhong and Guo Bing

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关键词：

基于计算流体动力学的新型电磁驱动搏动式灌注血泵泵头优化分析

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医用生物力学 2020年第3期35卷 296-303,310页

作者：赵圣功葛斌方旭晨李刚徐毅骁魏凌轩上海理工大学医疗器械与食品学院上海200093 上海理工大学附属市东医院重症医学科上海200438

目的应用计算流体动力学(computational fluid dynamics,CFD)方法对电磁驱动搏动式灌注血泵流场进行仿真分析,通过改进泵头结构改善血液在血泵的流动状态,提升其抗溶血性能。方法应用Fluent 17. 0分析泵头结构变化对泵内流场的影响,通... 详细信息

目的应用计算流体动力学(computational fluid dynamics,CFD)方法对电磁驱动搏动式灌注血泵流场进行仿真分析,通过改进泵头结构改善血液在血泵的流动状态,提升其抗溶血性能。方法应用Fluent 17. 0分析泵头结构变化对泵内流场的影响,通过血液流入和流出的4次仿真实验,分析内部液体的流线分布、中轴面上的湍流动能分布、血液流经泵头的压力损失和模型表面受到的切应力。结果在4次实验中,泵头入口与出口管路对称且与对称轴的夹角α=30°时,液体流线无明显紊乱,湍流程度较低;实验1中压力损失最小,为376. 8 Pa;实验1、2中的最大切应力分别为258. 6、302. 8 Pa,符合压力损失和溶血程度等血泵生物力学性能要求。选择α=30°模型为该电磁驱动搏动式灌注血泵的泵头结构,并通过3D打印技术进行制作。结论经过对泵头的优化分析,血泵溶血性能得到改善。研究结果可以运用到新型电磁驱动搏动式灌注血泵的设计与实验中。

关键词：搏动式血泵机械灌注泵头计算流体动力学数值模拟