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Enhancing Defect-Induced Dipole Polarization Strategy of SiC@MoO_(3)Nanocomposite Towards Electromagnetic Wave Absorption

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Nano-Micro Letters 2024年第12期16卷 406-426页

作者： Ting wang Wenxin Zhao Yukun Miao Anguo Cui chuanhui Gao Chang wang Liying Yuan Zhongning Tian Alan Meng Zhenjiang Li Meng Zhang College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042People’s Republic of China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042People’s Republic of China Shandong Engineering Laboratory for Preparation and Application of High-Performance Carbon-Materials College of Electromechanical EngineeringQingdao University of Science and TechnologyQingdao 266061People’s Republic of China Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science MOEShandong Key Laboratory of Biochemical AnalysisCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042People’s Republic of China

Defect engineering in transition metal oxides semiconductors(TMOs)is attracting considerable interest due to its potential to enhance conductivity by intentionally introducing defects that modulate the electronic structures of the ***,achieving a comprehensive understanding of the relationship between micro-structures and electromagnetic wave absorption capabilities remains elusive,posing a substantial challenge to the advancement of TMOs *** current research describes a process for the deposition of a MoO_(3)layer onto SiC nanowires,achieved via electro-deposition followed by high-temperature ***,intentional creation of oxygen vacancies within the MoO_(3)layer was carried out,facilitating the precise adjustment of electromagnetic properties to enhance the microwave absorption performance of the ***,the SiC@MO-t4 sample exhibited an excellent minimum reflection loss of-50.49 dB at a matching thickness of 1.27 ***,the SiC@MO-t6 sample exhibited an effective absorption bandwidth of 8.72 GHz with a thickness of 2.81 mm,comprehensively covering the entire Ku *** results not only highlight the pivotal role of defect engineering in the nuanced adjustment of electromagnetic properties but also provide valuable insight for the application of defect engineering methods in broadening the spectrum of electromagnetic wave absor ption ***@MO-t samples with varying concentrations of oxygen vacancies were prepared through in-situ etching of the SiC@MoO_(3)*** presence of oxygen vacancies plays a crucial role in adjusting the band gap and local electron distribution,which in turn enhances conductivity loss and induced polarization loss *** finding reveals a novel strategy for improving the absorption properties of electromagnetic waves through defect engineering.

关键词： Defect engineering Oxygen vacancies SiC@MoO_(3)nanocomposite Electromagnetic wave absorption Induced dipole polarization

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YIG陶瓷太赫兹介电谱的光调制特性

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太赫兹科学与电子信息学报 2020年第4期18卷 565-569页

作者： wang chuanhui wang Xing ZHANG Zhenwei LIU Yong School of Physics and Electronic Information Hubei University of EducationWuhan Hubei 430205China

The tunability of the terahertz dielectric spectra of Y3Fe5O12(YIG) ceramics under external optical field were investigated at room temperature by using terahertz time-domain spectroscopy. The Y3Fe5O12 ceramics annealed at 1 100 and 1 300 ℃ were successfully synthesized by a modified Pechini process. The samples were characterized by X-ray diffraction and no impurity phase has been detected. The crystallite sizes of the YIG ceramics are calculated to be about 50 nm for TS=1 100 ℃ and 77 nm for TS=1 300 ℃, respectively. And Scanning Electron Microscope(SEM) images show that the grain size is positively correlated with the sintering temperature. Application of the optical field leads to an appreciable tuning of the dielectric constant of the sample sintered at 1 100 ℃, which reaches up to 17.3% at 0.6 THz. Meanwhile the dielectric loss tangent of the sample sintered at 1 100 ℃ changes about 123.9%. On the contrast, both the dielectric constant and the loss tangent for the sample sintered at 1 300 ℃ keep invariable with the light excitation. These findings are attributed to space charges hopping among the grain boundaries excited by the external optical field.

关键词： yttrium iron garnet terahertz time-domain spectroscopy dielectric property space charge

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Greenhouse gas emissions during the COVID-19 pandemic from agriculture in China

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Frontiers of Agricultural Science and Engineering 2024年第3期11卷 409-427页

作者： Jianing TIAN chuanhui GU Yanchao BAI Division of Natural and Applied Sciences Duke Kunshan UniversityKunshan 215316China Environmental Research Center Duke Kunshan UniversityKunshan 215311China College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225009China

To study the impact of the COVID-19 pandemic on agricultural carbon emissions in China,the greenhouse gas emissions generated by crop and livestock production,and agricultural material and energy inputs in China from 2019 to 2021 were systematically *** was found that from 2019 to 2021,Net greenhouse gas emissions(NGHGE)from agriculture in China had an increasing *** emissions ranked first in NGHGE,with an annual proportion exceeding 65%and an increasing annual ***_(4)emissions were primarily influenced by enteric fermentation and rice *** oxide emissions accounted for around 22%of annual NGHGE and decreased from 2019 to *** main sources of N_(2)O emissions were the use of nitrogen fertilizers and manure *** dioxide emissions accounted for about 18%annually,with diesel and agricultural electricity use contributing to over 60%of CO_(2)*** carbon sequestration represented about a 6.1%lowering of *** combined proportion of CH4 emissions from enteric fermentation and rice production accounted for over 50%of total GHG *** changes in NGHGE were mainly caused by disturbance of the livestock industry during the pandemic.

关键词： Agricultural systems emission factors greenhouse gases soil carbon sequestration

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Perfluoropentane-based oxygen-loaded nanodroplets reduce microglial activation through metabolic reprogramming

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Neural Regeneration Research 2025年第4期20卷 1178-1191页

作者： Wanxian Luo chuanhui Xu Linxi Li Yunxiang Ji Yezhong wang Yingjia Li Yongyi Ye Department of Medicine Ultrasonics Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina Institute of Neuroscience Department of NeurosurgeryThe Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina

Microglia,the primary immune cells within the brain,have gained recognition as a promising therapeutic target for managing neurodegenerative diseases within the central nervous system,including Parkinson’s *** perfluorocarbon droplets have been reported to not only possess a high oxygen-carrying capacity,but also exhibit remarkable anti-inflammatory ***,the role of perfluoropentane in microglia-mediated central inflammatory reactions remains poorly *** this study,we developed perfluoropentane-based oxygen-loaded nanodroplets(PFP-OLNDs)and found that pretreatment with these droplets suppressed the lipopolysaccharide-induced activation of M1-type microglia in vitro and in vivo,and suppressed microglial activation in a mouse model of Parkinson’s *** suppression led to a reduction in the inflammatory response,oxidative stress,and cell migration capacity in ***,the neurotoxic effects were mitigated,which alleviated neuronal ***,ultrahigh-performance liquid chromatography–tandem mass spectrometry showed that the anti-inflammatory effects of PFP-OLNDs mainly resulted from the modulation of microglial metabolic *** further showed that PFP-OLNDs regulated microglial metabolic reprogramming through the AKT-mTOR-HIF-1α***,our findings suggest that the novel PFP-OLNDs constructed in this study alleviate microglia-mediated central inflammatory reactions through metabolic reprogramming.

关键词： metabolic reprogramming microglia microglial migration nanotherapy neurodegenerative diseases neuroinflammation oxygen-loaded nanodroplets Parkinson’s disease perfluoropentane ultra-performance liquid chromatography–mass spectrometry

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复杂地形下太阳总辐射空间订正方法——以四川省为例

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气象 2021年第6期47卷 746-754页

作者：王传辉申彦波安徽省公共气象服务中心合肥230031 中国气象局公共气象服务中心北京100081

利用四川省158个气象站2016—2019年逐小时2 m气温、相对湿度、地面气压、能见度等观测数据,通过SMARTS模式计算并积分得到逐月晴天太阳总辐射,建立晴天太阳总辐射随海拔高度的变化关系,将该关系应用到1990—2019年太阳总辐射空间插值... 详细信息

利用四川省158个气象站2016—2019年逐小时2 m气温、相对湿度、地面气压、能见度等观测数据,通过SMARTS模式计算并积分得到逐月晴天太阳总辐射,建立晴天太阳总辐射随海拔高度的变化关系,将该关系应用到1990—2019年太阳总辐射空间插值订正中,并对订正效果进行验证,结果表明:晴天太阳总辐射随海拔高度呈对数增加,海拔越高晴天太阳总辐射随高度增幅越小;辐射订正方面,海拔较低、地势平坦的四川盆地地区订正幅度最小,高海拔的川西高原订正幅度居中,高低海拔过渡地带订正幅度最大;交叉验证结果表明,用来验证的7个辐射站年平均绝对误差由182.77 kW·h·m^(-2)减少到145.48 kW·h·m^(-2),相对误差由13.41%减少到10.24%,冬半年订正效果好于夏半年。通过订正可有效提高复杂地形下太阳总辐射插值效果,减小插值误差。

关键词：太阳总辐射订正方法复杂地形交叉验证四川省

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Advances in the prerequisite and consequence of STING downstream signalosomes

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Medical Review 2024年第5期4卷 435-451页

作者： Xinliang Lu Xiaobing Li Lili Li chuanhui Han Sirui Li Institute of Immunology and Bone Marrow Transplantation Center of the First Affiliated Hospital Zhejiang University School of MedicineHangzhouChina InvivoGen Ltd. Hong Kong Science and Technology ParksHong KongChina Center for Systems Medicine Institute of Basic Medical SciencesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Suzhou Institute of Systems Medicine SuzhouJiangsuChina Peking University International Cancer Institute Peking University Cancer Hospital and InstituteHealth Science CenterPeking UniversityBeijing100084China Lineberger Comprehensive Cancer Center University of North Carolina at Chapel HillChapel HillNC 27599USA

The cyclic GMP-AMP synthase(cGAS)-stimulator of interferon genes(STING)pathway is an evolving DNA-sensing mechanism involved in innate immunity and pathogen defense that has been optimized while remaining *** from recognizing pathogens through conserved motifs,these receptors also detect aberrant or misplaced self-molecules as possible signs of perturbed *** binding external or self-derived DNA,a mobile sec-ondary messenger 2′3′-cyclic GMP-AMP(cGAMP)is produced by cGAS and in turn activates its adapter STING in the endo-plasmic reticulum(ER).Resting-state or activated STING protein isﬁnely restricted by multiple degradation *** post-translational changes of the STING protein,along with the regulatory machinery ofthe secret routes,limit the onset,strength and sustention of STING *** experiences a conformational shift and relocates with TBK1 from the ER to perinuclear vesicles containing transcription factors,provoking the transcription activity of IRF3/IFN-I and NF-κB pathways,as well as to initiate a number of cellular processes that have been shown to alter the immune landscape in cancer,such as autophagy,NLRP3 inflamma-some,ER stress,and cell *** signal thus serves as a potent activator for immune mobilization yet also triggers immune-mediated pathology in *** advances have established the vital role of STING in immune surveil-lance as well as tumorigenic *** review provides an overview of the disparate outcomes of cancer attributed to the actions of pleiotropic and coordinated STING downstream signalosomes,along with the underlying mechanisms of STING function in pathologies,providing therapeutic impli-cations for new approaches in hunt for the next generation of cancer immunotherapy base on STING.

关键词： stimulator of interferon genes signalosomes cellular heterogeneity cancer therapeutics

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近42年来青藏高原年内降水时空不均匀性特征分析

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地理学报 2011年第3期66卷 376-384页

作者：杨玮何金海王盘兴王传辉南京信息工程大学气象灾害省部共建教育部重点实验室南京210044

根据青藏高原1967-2008年逐日站点降水资料,定义了高原降水集中度(PCD)和集中期(PCP)。并运用EOF、相关分析等方法分析高原PCD和PCP的时空分布特征、PCD与高原强降水的关系以及PCP前期强影响信号。结果表明:高原大部分地区PCD处于0.4～... 详细信息

根据青藏高原1967-2008年逐日站点降水资料,定义了高原降水集中度(PCD)和集中期(PCP)。并运用EOF、相关分析等方法分析高原PCD和PCP的时空分布特征、PCD与高原强降水的关系以及PCP前期强影响信号。结果表明:高原大部分地区PCD处于0.4～0.8之间,PCP则处于36～41候之间。高原PCD以全区一致型的空间分布为主;而PCP则以南北反向型分布为主,全区一致型分布次之。整个高原PCD均呈减弱趋势,而PCP均表现为提前特征。除高原南侧个别地区,高原PCD无论与高原强降水日数还是强降水量均呈显著正相关。同时,高原南北部PCP对应的水汽输送存在显著差异,高原南部PCP主要受孟加拉湾季风爆发的影响。

关键词：降水集中度降水集中期时空非均匀性前期信号青藏高原

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Highly stretchable kirigami-patterned nanofiber-based nanogenerators for harvesting human motion energy to power wearable electronics

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Materials Futures 2024年第2期3卷 131-140页

作者： Chuan Ning Shengxin Xiang Xiupeng Sun Xinya Zhao chuanhui Wei Lele Li Guoqiang Zheng Kai Dong College of Materials Science and Engineering Key Laboratory of Material Processing and Mold(Ministry of Education)Zhengzhou UniversityZhengzhou 450001People’s Republic of China Key Laboratory of Materials Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001People’s Republic of China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400People’s Republic of China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

Wearable electronics are advancing towards miniaturization and ***,traditional energy supply methods have largely hindered their *** effective solution to this problem is to convert human mechanical energy into electricity to power wearable electronic ***,it is greatly attractive to design flexible,foldable and even stretchable energy harvesting ***,we use the electrospinning and kirigami approach to develop a type of highly stretchable kirigami-patterned nanofiber-based triboelectric nanogenerator(K-TENG).Due to its innovative structural design,the K-TENG can achieve a tensile strain of 220%,independent of the tensile properties of the material *** a person swings their arms,the K-TENG fixed to the clothing can convert mechanical energy from human movement into electrical *** produced electricity can directly drive 50 LED lights and a digital watch,or be stored in a lithium battery to charge the smartwatch and smartphone,*** study employs a new method to fabricate a stretchable triboelectric nanogenerator and demonstrates its promising applications in wearable power technology.

关键词： stretchable triboelectric nanogenerators kirigami energy harvesting

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Photoluminescence Characterization of NASICON Material

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稀有金属材料与工程 2006年第S3期 535-537页

作者： Yuehua He~1 Baofu Quan~1 Ying wang~2 chuanhui Cheng~1 Fengmin Liu~1 Biao wang (1.College of Electronic Science and Engineering,Jilin University,Changchun 130012,China) (2.School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China)

Besides gas sensitivity,NASICON （Na super ion conductor） material has luminescence *** this paper,the photoluminescence properties of NASICON and doped-NASICON material are *** NASICON material was synthesized by conventional sol-gel process,and doped with Er2O3,Tm2O3,Dy2O3,CsCl by 1%,3%,5% （mass ratio）,*** ultraviolet light （325 nm,He-Cd laser） excited luminescent emissions of the resulted powders are recorded *** in the 330 nm to 650 nm *** main peak of the pure NASICON is found at the wavelength of 474 nm （blue light）,the transition energy is 2.616 *** luminescent intensity is weakened obviously after doping with Er2O3and Tm2O3,but is increased after doping with Dy2O3and 3% CsCl.

关键词： photoluminescence NASICON luminescent intensity wavelength

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利用多元遥感数据进行CBERS-02卫星大气校正研究

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遥感技术与应用 2014年第6期29卷 1020-1026页

作者：陈浩麻金继王传辉安徽师范大学物理与电子信息学院安徽芜湖241000 安徽师范大学国土资源与旅游学院安徽芜湖241003

针对山地丘陵等复杂地表下地形对遥感数据影响较大的情况,提出了适合该区域的大气校正方法。该方法以MODIS数据为数据源,基于6S反演出陆地上空的气溶胶模式和光学厚度。使用同时相同区域的TM数据对CCD数据进行交叉定标,利用ATCOR3实现了... 详细信息

针对山地丘陵等复杂地表下地形对遥感数据影响较大的情况,提出了适合该区域的大气校正方法。该方法以MODIS数据为数据源,基于6S反演出陆地上空的气溶胶模式和光学厚度。使用同时相同区域的TM数据对CCD数据进行交叉定标,利用ATCOR3实现了对CBERS-02星CCD数据进行大气校正。校正前后数据比较结果表明:该算法还原了下垫面原貌,尤其对山区丘陵等复杂地表具有很好效果。

关键词： MODIS 大气校正 CBERS-02 气溶胶

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