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BL03HB: a Laue microdiffraction beamline for both protein crystallography and materials science at SSRF

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Nuclear Science and Techniques 2024年第7期35卷 68-78页

作者： Zhi-Jun Wang Si-Sheng Wang Zheng-Huang Su Li Yu Yu-Zhu Wang Bo Sun wen wen Xing-Yu gao Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai201210China University of Chinese Academy of Science Beijing100049China

A Laue microdiffraction beamline(BL03HB) was constructed at the Shanghai Synchrotron Radiation Facility(SSRF).This beamline features two consecutive focusing points in two different sectors within its end station, the first dedicated to protein crystallography and the other tailored to materials science applications. Based on a superbend dipole magnet with a magnetic field of 2.29 T, a two-stage focusing design was implemented with two sets of Kirkpatrick-Baez mirrors to achieve a micro white beam as small as 4.2 μ m ×4.3 μ m at the first sector and 0.9 μ m ×1.3 μ m at the second sector in the standard beamline operation mode at SSRF. The X-ray microbeam in the two sectors can be easily switched between monochromatic and white beams by moving a four-bounce monochromator in or out of the light path, respectively. In the protein crystallography sector, white-beam Laue microdiffraction was demonstrated to successfully determine the structure of protein crystals from only a few images of diffraction data collected by a Pilatus 2 M area detector. In the materials science sector,the white-beam Laue diffraction was collected in a reflection geometry using another Pilatus 2 M area detector, which could map the microstructural distribution on the sample surface by scanning the samples. In general, the BL03HB beamline promotes the application of Laue microdiffraction in both protein crystallography and materials science. This paper presents a comprehensive overview of the BL03HB beamline, end station, and the first commission results.

关键词： Crystallography White-beam Laue microdiffraction Beamline Synchrotron

Dynamic interactive bitwise meta-holography with ultra-high computational and display frame rates

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Opto-Electronic Advances 2024年第1期7卷 36-46页

作者： Yuncheng Liu Ke Xu Xuhao Fan Xinger Wang Xuan Yu Wei Xiong hui gao Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Optics Valley Laboratory Wuhan 430074China

Interactive holography offers unmatched levels of immersion and user engagement in the field of future *** of the substantial progress has been made in dynamic meta-holography,the realization of real-time,highly smooth interactive holography remains a significant challenge due to the computational and display frame rate *** this study,we introduced a dynamic interactive bitwise meta-holography with ultra-high computational and display frame *** our knowledge,this is the first reported practical dynamic interactive metasurface holographic *** spa-tially divided the metasurface device into multiple distinct channels,each projecting a reconstructed *** switching states of these channels were mapped to bitwise operations on a set of bit values,which avoids complex holo-gram computations,enabling an ultra-high computational frame *** approach achieves a computational frame rate of 800 kHz and a display frame rate of 23 kHz on a low-power Raspberry Pi computational *** to this methodology,we demonstrated an interactive dynamic holographic Tetris game system that allows interactive gameplay,color display,and on-the-fly hologram *** technology presents an inspiration for advanced dynamic meta-holography,which is promising for a broad range of applications including advanced human-computer interaction,real-time 3D visualization,and next-generation virtual and augmented reality systems.

关键词： interactive display meta-holography bitwise operation ultra-high frame rate

Adhesion property of AlCrNbSiTi high-entropy alloy coating on zirconium:experimental and theoretical studies

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Nuclear Science and Techniques 2024年第8期35卷 79-91页

作者： Bao‑Liang Zhang wen‑Guan Liu Meng‑He Tu Can Fang Yan Liu Yu‑hui Wang Yong Hu hui Wang China Institute of Atomic Energy Beijing 102413China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China

Experimental scratch tests and first-principles calculations were used to investigate the adhesion property of AlCrNbSiTi high-entropy alloy(HEA)coatings on zirconium *** HEA and Cr coatings were deposited on Zr alloy substrates using multi-arc ion plating technology,and scratch tests were subsequently conducted to estimate the adhesion property of the *** results indicated that Cr coatings had better adhesion strength than HEA coatings,and the HEA coatings showed *** special quasi-random structure approach was used to build HEA models,and Cr/Zr and HEA/Zr interface models were employed to investigate the cohesion between the coatings and Zr substrate using first-principles *** calculated interface energies showed that the cohesion between the Cr coating and the Zr substrate was stronger than that of the HEA coating with *** contrary to Al or Si in the HEA coating,Cr,Nb,and Ti atoms binded strongly with Zr *** on the calculated elastic constants,it was found that low Cr and high Al content decreased the mechanical performances of HEA ***,this study demonstrated the utilization of a combined approach involving first-principles calculations and experimental studies for future HEA coating development.

关键词： High-entropy alloy coating Cr coating Adhesion property Scratch test First-principles calculation

基于农户受偿意愿的农业面源污染治理生态补偿标准及影响因素

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生态学杂志 2021年第9期40卷 2954-2966页

作者：栾若芳文高辉胡贤辉湖南师范大学地理科学学院长沙410081 地理空间大数据挖掘与应用湖南省重点实验室长沙410081

农业面源污染治理的关键是从源头有效激励农户主动减施或不施农药化肥,而农业面源污染治理的受偿标准及影响因素对于持续推行生态补偿政策具有重要意义。本文从洞庭湖流域农户调研数据出发,基于效用理论和补偿原理构建效用函数测度农户... 详细信息

农业面源污染治理的关键是从源头有效激励农户主动减施或不施农药化肥,而农业面源污染治理的受偿标准及影响因素对于持续推行生态补偿政策具有重要意义。本文从洞庭湖流域农户调研数据出发,基于效用理论和补偿原理构建效用函数测度农户参与农业面源污染治理个人效用最大化时的生态补偿额度,并利用二元Logistic回归模型分析农户受偿意愿影响因素。结果表明:1)在给予一定生态补偿的情况下,调查区有77.3%的农户愿意参与农业面源污染治理、保护农业生态环境;2)若减少50%的化肥农药施用量,不考虑客观因素的非参数农业面源污染治理生态补偿标准非参数估计结果为2094.41元·hm^(-2),而参数估计模型结果为1640.21元·hm^(-2),可分别作为洞庭湖流域农业面源污染治理生态补偿标准的上、下限值;3)回归分析结果显示,农户对政策认知水平是农户接受农业面源污染治理生态补偿的直接关键因素,其中减施农药和化肥的受偿意愿金额是农户参与农业面源污染治理的根本动因。有关部门应从农户意愿视角出发,适当提高现行农业面源污染治理补偿标准,并探寻提升农户幸福感的途经。

关键词：农业面源污染生态补偿标准受偿意愿农户效用理论

Elastohydrodynamic Lubrication Interface Stiffness and Damping Considering Asperity Lateral Contact

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Acta Mechanica Solida Sinica 2024年第1期37卷 109-123页

作者： Zhiqiang gao Yu Zhang Xian Wei Yanfang Zhu Lixia Peng Weiping Fu wen Wang School of Mechanical and Precision Instrument Engineering Xi'an University of TechnologyXi'an 710048China School of Intelligent Manufacturing Panzhihua UniversityPanzhihua 617000China Material Corrosion and Protection Key Laboratory of Sichuan Province Sichuan University of Light Chemical TechnologyYibin 644002China School of Mechanical Engineering Anyang Institute of TechnologyAnyang 455099China

Elastohydrodynamic lubrication(EHL)point contact occurs between two rough surfaces at the mesoscopic level,while the interaction of rough surfaces involves contact between asperities at the microscale *** most cases,the contact between asperities within an interface takes the form of lateral contact rather than peak *** devoid of contact asperities are filled with lubricating ***,conventional models often oversimplify lateral contact forms as interactions between asperities and a smooth,rigid *** simplifications fail to accurately represent the true contact conditions and can lead to inaccuracies in the analysis of EHL’s contact *** address this issue,we have developed a novel EHL interface model comprising two rough *** model allows us to explore the influence of asperity height,contact angle,and contact azimuth angle on EHL interface performance.

关键词： EHL interface Asperity lateral contact Contact stiffness Damping

Two positive effects with one arrow:Modulating crystal and interfacial decoration towards high-potential cathode material

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Journal of Energy Chemistry 2024年第5期92卷 216-223页

作者： Xuexiu Gu Xuan-wen gao Dongrun Yang Qinfen Gu YSong Hong Chen Tianzhen Ren wen-Bin Luo Institute for Energy Electrochemistry and Urban Mines Metallurgy School of MetallurgyNortheastern UniversityShenyang 110819LiaoningChina Australian Synchrotron(ANSTO) 800 Blackburn RdClaytonVictoria 3168Australia School of Science and Engineering University of DundeeNethergateDundee DD14HNScotlandUK

As the primary suppliers of cyclable sodium ions,O3-type layer-structured manganese-based oxides are recognized as highly competitive cathode candidates for sodium-ion *** advance the development of high-energy sodium-ion batteries,it is crucial to explore cathode materials operating at high voltages while maintaining a stable cycling *** orbital and electronic structure of the octahedral center metal element plays a crucial role in maintaining the octahedra structural integrity and improving Na^(+)ion diffusion by introducing heterogeneous chemical *** by the abundant configuration of extra nuclear electrons and large ion radius,we employed trace amounts of tungsten in this *** obtained cathode material can promote the reversibility of oxygen redox reactions in the high-voltage region and inhibit the loss of lattice ***,the formation of a Na_(2)WO_(4) coating on the material surface can improve the interfacial stability and interface ions *** demonstrates an initial Coulombic efficiency(ICE)of 94.6%along with 168.5 mA h g^(-1 )discharge capacity within the voltage range of 1.9-4.35 *** findings contribute to the advancement of high-energy sodium-ion batteries by providing insights into the benefits of tungsten doping and Na_(2)WO_(4) coating on cathode materials.

关键词： Sodium ion battery Layer-structured manganese-based oxides Cathodematerial Surface modification Elements doping

基于计划行为理论的耕地面源污染治理农户参与意愿研究——以湘阴县为例

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长江流域资源与环境 2020年第10期29卷 2323-2333页

作者：朱燕芳文高辉胡贤辉方慧琳湖南师范大学资源与环境科学学院湖南长沙410081 湖南师范大学地理空间大数据挖掘与应用湖南省重点实验室湖南长沙410081

耕地面源污染治理是新时代建设美丽中国、建设美丽乡村的重要举措,更是提高耕地质量,保障地区农业生产可持续发展和实现生态健康的必要环节。首先,基于计划行为理论从理论上分析农户参与耕地面源污染治理的意愿及行为机理,进而利用洞庭... 详细信息

耕地面源污染治理是新时代建设美丽中国、建设美丽乡村的重要举措,更是提高耕地质量,保障地区农业生产可持续发展和实现生态健康的必要环节。首先,基于计划行为理论从理论上分析农户参与耕地面源污染治理的意愿及行为机理,进而利用洞庭湖南岸粮食主产县湘阴县农户入户调查数据,运用二元Logistic模型、主成分分析法进行实证检验。研究结果显示:调查区域仅有61.29%的受访农户愿意参与耕地面源污染治理;参与面源污染治理收益增加度、参与面源污染治理改善周边环境、农技人员影响力、参与面源污染治理的精力能力、当过村干部等因素对耕地面源污染治理农户参与意愿均呈显著正向影响;而农户年龄对耕地面源污染治理农户参与意愿为显著负向影响。据此,在耕地面源污染治理过程中,地方政府应加强耕地面源污染治理政策宣传及农技人员技术指导,充分发挥村干部的模范作用,增强农户治理耕地面源污染的主体意识,提升农户治理效能感及社会责任感,切实保障农户利益,引导农户主动积极参与耕地面源污染治理,建设美丽生态洞庭。

关键词：耕地面源污染治理参与意愿计划行为理论农户

Significantly Enhanced Melt Memory Effect of Metallocene-made Isotactic Polypropylene Containing Talc

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Chinese Journal of Polymer Science 2024年第2期42卷 213-222,I0008页

作者： Hong-wen Sun Fu-Shan Wang Yan gao Fu-Qing Wei Jia-Chun Feng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200433China Lanzhou Petrochemical Corporation of PetroChina Lanzhou730060China Lanzhou Petrochemical Research Center Petrochemical Research Institute of PetroChinaLanzhou730060China

The melt memory effect is a widely observed phenomenon in semi-crystalline polymers. In practical applications, various additives are usually introduced into polymers, which may affect their melt memory behavior. In this work, the effect of talc on the melt memory effect of metallocene-made isotactic polypropylene(M-PP) was investigated in detail by using the differential scanning calorimetry. The results indicated that the introduction of talc significantly strengthened the melt memory effect of M-PP. Specifically, the upper limit temperature of Domain II increased from 161 ℃ to 174 ℃, resulting in a substantial widening of the temperature range of Domain IIa from 1 ℃ to 14 ℃. Analysis of the crystal orientation of the M-PP containing talc cooled from various Ts suggested that the remarkably enhanced melt memory effect could be ascribed to the stabilization of oriented nuclei facilitated by talc. This stabilizing effect was likely attributable to the prefreezing effect or the sorption interaction between talc and the M-PP chains.

关键词： Metallocene-made isotactic polypropylene Talc Melt memory effect Crystal orientation

Rapid Antidepressant-Like Potential of Chaihu Shugan San Depends on Suppressing Glutamate Neurotransmission and Activating Synaptic Proteins in Hippocampus of Female Mice

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Chinese Journal of Integrative Medicine 2024年第8期30卷 692-700页

作者： LU Chao gao Zi-wei XING Shan WANG hui-hui HUANG Yun-ke ZHOU Hang WU Lei Department of Chinese Medicine Preparations Affiliated Hospital of Nanjing University of Chinese MedicineJiangsu Province Hospital of Chinese MedicineNanjing210029China College of Chinese Medicine Nanjing University of Chinese MedicineNanjing210046China Department of Chinese Medicine Women’s HospitalSchool of MedicineZhejiang UniversityHangzhou310000China

Objective To explore the rapid antidepressant potential and the underlying mechanism of Chaihu Shugan San(CSS)in female *** Liquid chromatography mass spectrometry(LC-MS)/MS was used to determine the content of main components in CSS to determine its *** C57BL/6J mice were randomly divided into 4 groups,including control(saline),vehicle(saline),CSS(4 g/kg)and ketamine(30 mg/kg)*** were subjected to irregular stress stimulation for 4 weeks to establish the chronic mild stress(CMS)model,then received a single administration of *** hours later,the behavioral tests were performed,including open field test,tail suspension test(TST),forced swimming test(FST),novelty suppression feeding test(NSF),and sucrose preference test(SPT).Western blot analysis was used to detect the expression levels of N-methyl-D-aspartate receptor(NMDA)subtypes[N-methyl-D-aspartate receptor 1(NR1),NR2A,NR2B],synaptic proteins[synapsin1 and post synaptic density protein 95(PSD95)],and brain-derived neurotrophic factor(BDNF).Moreover,the rapid antidepressant effect of CSS was tested by pharmacological technologies and optogenetic interventions that activated glutamate receptors,*** Compared with the vehicle group,a single administration of CSS(4 g/kg)reversed all behavioral defects in TST,FST,SPT and NSF caused by CMS(P<0.05 or P<0.01).CSS also significantly decreased the expressions of NMDA subtypes(NR1,NR2A,NR2B)at 2 h in hippocampus of mice(all P<0.01).In addition,similar to ketamine,CSS increased levels of synaptic proteins and BDNF(P<0.05 or P<0.01).Furthermore,the rapid antidepressant effects of CSS were blocked by transient activation of NMDA receptors in the hippocampus(all P<0.01).Conclusion Rapid antidepressant effects of CSS by improving behavioral deficits in female CMS mice depended on rapid suppression of NMDA receptors and activation of synaptic proteins.

关键词： Chaihu Shugan San female rapid antidepressant potential N-methyl-D-aspartate receptor synapticprotein optogenetic Chinesemedicine