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Predicting the start and maximum amplitude of solar cycle 24 using similar phases and a cycle grouping

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Chinese Journal of Astronomy and Astrophysics 2009年第2期9卷 133-136页

作者： Jia-Long Wang wei-guo zong Gui-Ming Le Hai-Juan Zhao Yun-Qiu Tang Yang Zhang National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China National Center for Space Weather China Meteorological Administration Beijing 100081 China

We find that the solar cycles 9, 11, and 20 are similar to cycle 23 in their respective descending phases. Using this similarity and the observed data of smoothed monthly mean sunspot numbers （SMSNs） available for the descending phase of cycle 23, we make a date calibration for the average time sequence made of the three descending phases of the three cycles, and predict the start of March or April 2008 for cycle 24. For the three cycles, we also find a linear correlation of the length of the descending phase of a cycle with the difference between the maximum epoch of this cycle and that of its next cycle. Using this relationship along with the known relationship between the rise-time and the maximum amplitude of a slowly rising solar cycle, we predict the maximum SMSN of cycle 24 of 100.2±7.5 to appear during the period from May to October 2012.

关键词： Sun cycle- Sun activity

Solar X-ray and EUV imager on board the FY-3E satellite

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Light(Science & Applications) 2022年第12期11卷 2939-2951页

作者： Bo Chen Xiao-Xin Zhang Ling-Ping He Ke-Fei Song Shi-Jie Liu Guang-Xing Ding Jin-Ping Dun Jia-wei Li Zhao-Hui Li Quan-Feng guo Hai-Feng Wang Xiao-Dong Wang Yun-Qi Wang Hong-Ji Zhang Guang Zhang Zhen-wei Han Shuang Dai Pei-Jie Zhang Liang Sun Yang Liu software engineer Peng Wang Kun Wu Chen Tao Shi-Lei Mao Gui Mei Liang Yang Li-Heng Chen Chun-Yang Han Bin Huang Yang Liu mechanical engineer Shuai Ren Peng Zhou Ze-Xiwei Xiao-Xue Zhang Yue Zhang Xin Zheng Yang Wang Ya Chen Jing-Jiang Xie Fei He Qiao Song wei-guo zong Xiu-Qing Hu Peng Zhang Jing-Song Wang Zhong-Dong Yang Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina State Key Laboratory of Applied Optics Chinese Academy of SciencesChangchunChina National Satellite Meteorological Center China Meteorological AdministrationBeijingChina Key Laboratory of Space Weather National Center for Space WeatherChina Meteorological AdministrationBeijingChina Innovation Center for Fengyun Meteorological Satellite(FYSIC) BeijingChina Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina

The solar X-ray and Extreme Ultraviolet Imager(X-EUVI),developed by the Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences(CIOMP),is the first space-based solar X-ray and Extreme ultraviolet(EUV)imager of China loaded on the Fengyun-3E(FY-3E)satellite supported by the China Meteorological Administration(CMA)for solar *** started work on July 11,2021,X-EUVI has obtained many solar *** instrument employs an innovative dual-band design to monitor a much larger temperature range on the Sun,which covers 0.6-8.0 nm in the X-ray region with six channels and 19.5 nm in the EUV region.X-EUVI has a field of view of 42′,an angular resolution of 2.5″per pixel in the EUV band and an angular resolution of 4.1″per pixel in the X-ray *** instrument also includes an X-ray and EUV irradiance sensor(X-EUVS)with the same bands as its imaging optics,which measures the solar irradiance and regularly calibrates the solar *** radiometric calibration of X-EUVS on the ground has been completed,with a calibration accuracy of 12%.X-EUVI is loaded on the FY-3E satellite and rotates relative to the Sun at a uniform ***-field calibration is conducted by utilizing successive rotation solar *** agreement between preliminarily processed X-EUVI images and SDO/AIA and Hinode/XRT images indicates that X-EUVI and the data processing algorithm operate properly and that the data from X-EUVI can be applied to the space weather forecast system of CMA and scientific investigations on solar activity.

关键词： image instrument Solar

Analysis of Micromechanical Properties at the Interface of Pre-wet SBS Modified Asphalt Mixture Based on Molecular Simulation Technology

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 103-113页

作者： CHEN Wuxing CHEN Shuang YU Yan ZHANG Jiangyi XU Haiyang guo wei School of Mines China University of Mining and TechnologyXuzhou 221000China College of Construction Engineering Jilin Uni-versityChangchun 130026China

The pre-wetting of aggregate surface is a means to improve the interface performance of SBS modified asphalt and *** effect of pre-wetting technology on the interaction between SBS modified asphalt and aggregate was analyzed by molecular dynamics *** diffusion coefficient and concentration distribution of SBS modified asphalt on aggregate surface are *** simulation results show that the diffusion coefficient of the aggregate surface of SBS modified asphalt is increased by 47.6%and 70.5%respectively after 110#asphalt and 130#asphalt are *** concentration distribution of SBS modified asphalt on the aggregate surface after pre-wetting is more *** to the results of interface energy calculation,the interface energy of SBS modified bitumen and aggregate can be increased by about 5%after *** to the results of molecular dynamics simulation,the pre-wetting technology can effectively improve the interface workability of SBS modified bitumen and aggregate,so as to improve the interface performance.

关键词： pre-wet oil-stone interface interface interaction interface mechanics molecular dynamics simulation

A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning

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Nano-Micro Letters 2025年第2期17卷 417-431页

作者： Yunjian guo Kunpeng Li wei Yue Nam‑Young Kim Yang Li guozhen Shen Jong‑Chul Lee Department of Electronic Convergence Engineering Kwangwoon UniversitySeoul 01897South Korea Radio Frequency Integrated Circuit(RFIC)Bio Centre Kwangwoon UniversitySeoul 01897South Korea Department of Electronic Engineering Kwangwoon UniversitySeoul 01897South Korea School of Microelectronics Shandong UniversityJinan 250101People’s Republic of China State Key Laboratory of Integrated Chips and Systems Fudan UniversityShanghai 200433People’s Republic of China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily *** existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple *** features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance *** wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist ***,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various *** system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and *** proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific *** utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication.

关键词： Wearable wristband Self-supervised contrastive learning Dynamic gesture Air-writing Human-machine interaction

High-performance poly(aromatic pyridine) copolymers with crown ether moieties for high temperature polymer electrolyte membrane fuel cells

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Science China Chemistry 2025年

作者： Qian Wang Songhao Zhao Yunpeng guo wei wei Lele Wang Jingshuai Yang Department of Chemistry College of Sciences Northeastern University Institute of Metal Research Chinese Academy of Sciences

This study concentrates on the development of high temperature polymer electrolyte membranes（HT-PEMs）, which are essential components for HT-PEM fuel cells（HT-PEMFCs）. Although the phosphoric acid（PA）-doped polybenzimidazole（PBI） has been regarded as the successful HT-PEM, this system still suffers from several challenges, including the use of carcinogenic monomers, complex synthesis procedures, and poor solubility in organic solvents. To develop more cost-effective, readily synthesized and high-performance alternatives, this study employs a simply superacid-catalyzed Friedel-Crafts reaction to synthesize a series of poly（triphenyl-co-dibenzo-18-crown-6 pyridine） copolymers, denoted as P(TPx%-co-CEy%), using ptriphenyl, dibenzo-18-crown-6 and 4-acetylpyridine as monomers. The copolymerized hydrophilic and bulky crown ether unites introduce large free volumes and multiple interaction sites with PA molecules, as elucidated by theoretical *** microphase separation structures are formed as confirmed by atomic force microscope（AFM）, transmission electron microscopy（TEM） and small-angle X-ray scattering（SAXS）. Thus P(TPx%-co-CEy%) membranes exhibit excellent PA absorption and proton conduction abilities. For example, after immersing in 85 wt% PA at 30 °C, the P(TP91%-co-CE9%) membrane achieves a PA doping content of 205% and a high conductivity of 0.138 S cm-1at 180 °C, while maintaining a tensile strength of 7.5 MPa at room temperature. Without humidification and backpressure, the peak power density of an H2-O2cell equipped with P(TP91%-co-CE9%)/205%PA reaches nearly 1200 mW cm-2, representing one of the highest performances reported for PA-doped HT-PEMs to date. This work demonstrates the enormous potential of poly（triphenyl-co-crown ether pyridine） membranes in the HT-PEMFC applications.

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Sequence-activated chemiluminescence probes: programmable illumination for high-contrast in vivo sensing and imaging

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Science China Chemistry 2025年第01期 26-34页

作者： Yutao Zhang Juan Li wei-Hong Zhu Zhiqian guo Shanghai Key Laboratory of Functional Materials Chemistry Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology State Key Laboratory of Bioreactor Engineering Shanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismEast China University of Science & Technology

Sequence-activated chemiluminescence(CL) technique offers a unique approach to detecting specific biomolecules or cellular events with high sensitivity and spatial resolution. The fundamental principle behind sequence-activated CL probes involves tailoring highly-controllable CL signals in response to specific sequences or events of interest, thus enabling high-contrast signals under complex physiological conditions. This sequential activation could be triggered by enzymes, reactive oxygen species(ROS), biothiols or changes in the microenvironment. These unique sequence-activated CL probes bestow several advantages, including minimal background, deep-tissue penetration, and the ability of non-invasive or minimally invasive detection. The sequence-activated CL techniques represent a significant advancement in molecular imaging and diagnostics. In this mini-review, we focus on the latest developments in sequential CL probes, addressing the technical challenges and discussing the future trajectory by harnessing CL signaling and molecular recognition.

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Decreased levels of phosphorylated synuclein in plasma are correlated with poststroke cognitive impairment

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Neural Regeneration Research 2025年第9期20卷 2598-2610页

作者： Yi Wang Yuning Li Yakun Gu wei Ma Yuying Guan Mengyuan guo Qianqian Shao Xunming Ji Jia Liu Department of Clinical Laboratory Beijing Bo’ai HospitalChina Rehabilitation Research CenterCapital Medical UniversityBeijingChina Beijing Institute of Brain Disorders Laboratory of Brain DisordersMinistry of Science and TechnologyCollaborative Innovation Center for Brain DisordersBeijing Advanced Innovation Center for Big Data-based Precision MedicineCapital Medical UniversityBeijingChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina

Poststro ke cognitive impairment is a major secondary effect of ischemic stroke in many patients;however,few options are available for the early diagnosis and treatment of this *** aims of this study were to(1)determine the specific relationship between hypoxic andα-synuclein during the occur of poststroke cognitive impairment and(2)assess whether the serum phosphorylatedα-synuclein level can be used as a biomarker for poststro ke cognitive *** found that the phosphorylatedα-synuclein level was significantly increased and showed pathological aggregation around the cerebral infa rct area in a mouse model of ischemic *** addition,neuronalα-synuclein phosphorylation and aggregation were observed in the brain tissue of mice subjected to chronic hypoxia,suggesting that hypoxia is the underlying cause ofα-synuclein-mediated pathology in the brains of mice with ischemic *** phosphorylatedα-synuclein levels in patients with ischemic stroke were significantly lower than those in healt hy subjects,and were positively correlated with cognition levels in patients with ischemic ***,a decrease in serum high-density lipoprotein levels in stroke patie nts was significantly correlated with a decrease in phosphorylatedα-synuclein *** ischemic stroke mice did not show significant cognitive impairment or disrupted lipid metabolism 14 days after injury,some of them exhibited decreased cognitive function and reduced phosphorylatedα-synuclein *** together,our results suggest that serum phosphorylatedα-synuclein is a potential biomarker for poststroke cognitive impairment.

关键词： biomarker high-density lipoprotein ischemic stroke phosphorylatedα-synuclein poststroke cognitive impairment

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海洋细菌DT-7产琼胶酶的培养基组分优化

水产学报 2009年第3期33卷 511-518页

作者：桑卫国章宗铭宁波大学应用海洋生物技术教育部重点实验室

培养基是微生物生长的重要条件之一。为研究微生物发酵法获取高活性琼胶酶并为今后酶法生产琼胶寡聚糖奠定一定基础,利用筛选实验设计法,首次以海洋细菌***-7为实验菌株,以琼胶酶活性为评价指标,对该菌株培养基进行筛选,所筛选的8个相... 详细信息

培养基是微生物生长的重要条件之一。为研究微生物发酵法获取高活性琼胶酶并为今后酶法生产琼胶寡聚糖奠定一定基础,利用筛选实验设计法,首次以海洋细菌***-7为实验菌株,以琼胶酶活性为评价指标,对该菌株培养基进行筛选,所筛选的8个相关因子为X1(琼胶粉)、X2(NaC l)、X3(FePO4)、X4(CaC l2)、X5(K2HPO4)、X6(FeSO4.7H2O)、X7(酵母膏)、X8(蛋白胨),其中X1(琼胶粉)、X4(CaC l2)、X8(蛋白胨)对产琼胶酶活性有显著影响(P<0.05),然后采用Box-Behnken设计法进行实验设计,再应用SAS 8.2软件的二次响应面回归程序,对实验点的响应值进行回归分析,最后建立了二次响应面回归模型Y1=499.6+19.45X1+13.99X4-1.213X8-33.16X12-5.3X1X4-3.45X1X8-39.64X42-10.23X4X8-15.79X82。优化后培养基组分(w/v):琼胶粉0.536%,NaC l 2.5%,FePO40.1%,CaC l20.052%,K2HPO40.1%,FeSO4.7H2O 0.03%,酵母膏1%,蛋白胨0.484%;经培养基组分优化后,在250 mL三角瓶装液量为50 mL、初始pH 7.5、摇床转速为120 r/m in、培养温度为(23±1)℃,培养28 h的条件下,菌株产酶活力从优化前的372.0 U/mL提高到503.3 U/mL,酶活力为前者的1.35倍。上述研究结果表明:SAS软件可快速、有效地优化培养基组分配方;优化后的DT-7培养基配方的组分简单,这为今后低成本生产高活性琼胶酶提供有利条件;对菌株***-7的选育及其发酵特性的深入研究有望解决琼胶酶的商品化。

关键词：琼胶酶短波单胞菌属响应面

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利用高温发酵菌糠研制水稻育秧基质

中国农业大学学报 2016年第10期21卷 23-29页

作者：郑丹王轶赵春霞陈金国程薇郭鹏崔宗均湖北省农业科学院农产品加工与核农技术研究所武汉430064 广西壮族自治区土壤肥料工作站南宁530007 中国农业大学农学院北京100193

将经高温发酵处理后的杏鲍菇菌糠与土壤按照比例进行配比制作水稻育秧基质,分析不同配比的水稻育秧基质的理化性质,比较研究水稻秧苗的秧苗素质、根系性状和营养吸收情况等。结果表明添加高温发酵腐熟的杏鲍菇菌糠对育秧基质的容重、总... 详细信息

将经高温发酵处理后的杏鲍菇菌糠与土壤按照比例进行配比制作水稻育秧基质,分析不同配比的水稻育秧基质的理化性质,比较研究水稻秧苗的秧苗素质、根系性状和营养吸收情况等。结果表明添加高温发酵腐熟的杏鲍菇菌糠对育秧基质的容重、总孔隙度、通气孔隙和持水孔隙具有改善作用,随着菌糠添加量的增加,容重逐渐减少,总孔隙度、通气孔隙和持水孔隙逐渐增加。水稻秧苗的株高、叶绿素含量、秧苗地上部百株干重、根的百株干重、根系活力和水稻秧苗的氮、磷、钾含量水平均优于100%土壤和100%菌糠,其中V(土壤)∶V(菌糠)为20%∶80%的基质配比更有利于水稻壮秧、干物质积累、根系生长发育和对氮、磷、钾的吸收。

关键词：杏鲍菇菌糠腐熟水稻育秧基质