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Himalayas as a global hot spot of springtime stratospheric intrusions:Insight from isotopic signatures in sulfate aerosols

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Research in Cold and Arid Regions 2024年第1期16卷 5-13页

作者： Kun Wang ShiChang Kang Mang Lin PengFei chen Chaoliu Li XiuFeng Yin Shohei Hattori Teresa L.Jackson JunHua Yang YiXi liu Naohiro Yoshida Mark HThiemens State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)LanzhouGansu 730000China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryCASGuangzhouGuangdong 510640China University of Chinese Academy of Sciences Beijing 100049China International Center for Isotope Effects Research(ICIER) School of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023China Frontiers Science Center for Critical Earth Material Cycling State Key Laboratory for Mineral Deposits ResearchSchool of Earth Sciences and EngineeringNanjing UniversityNanjingJiangsu 210023China Department of Chemical Science and Engineering School of Materials and Chemical TechnologyTokyo Institute of Technology4259 Nagatsuta-choMidori-kuYokohamaKanagawa 226-8502Japan Department of Chemistry and Biochemistry University of California San DiegoLa JollaCA 92093-0021USA Earth-Life Science Institute Tokyo Institute of TechnologyMeguro-kuTokyo 152-8551Japan National Institute of Information and Communications Technology KoganeiTokyo 184-8795Japan

Downward transport of stratospheric air into the troposphere(identified as stratospheric intrusions)could potentially modify the radiation budget and chemical of the Earth's surface *** the highest and largest plateau on earth,the Tibetan Plateau including the Himalayas couples to global climate,and has attracted widespread attention due to rapid warming and cryospheric *** studies recognized strong stratospheric intrusions in the Himalayas but are poorly understood due to limited direct evidences and the complexity of the meteorological dynamics of the third ***^(35)S is a radioactive isotope predominately produced in the lower stratosphere and has been demonstrated as a sensitive chemical tracer to detect stratospherically sourced air mass in the planetary boundary ***,we report 6-month(April–September 2018)observation of^(35)S in atmospheric sulfate aerosols(^(35)SO_(4)^(2-))collected from a remote site in the Himalayas to reveal the stratospheric intrusion phenomenon as well as its potential impacts in this *** the sampling campaign,the^(35)SO_(4)^(2-)concentrations show an average of 1,070±980 atoms/m^(3).In springtime,the average is 1,620±730 atoms/m^(3),significantly higher than the global existing data measured so *** significant enrichments of^(35)SO_(4)^(2-)measured in this study verified the hypothesis that the Himalayas is a global hot spot of stratospheric intrusions,especially during the springtime as a consequence of its unique geology and atmospheric *** combined with the ancillary evidences,e.g.,oxygen-17 anomaly in sulfate and modeling results,we found that the stratospheric intrusions have a profound impact on the surface ozone concentrations over the study region,and potentially have the ability to constrain how the mechanisms of sulfate oxidation are affected by a change in plateau atmospheric properties and *** study provides new observational constraints on stra

关键词： Himalayas Stratospheric intrusions Cosmogenic^(35)SO_(4)^(2-) Ozone Atmospheric oxidation

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Peroxisome Proliferator-Activated Receptor-γCoactivator-1αin the Spotlight with Multiple Sclerosis

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Neuroscience Bulletin 2024年第2期40卷 268-272页

作者： Ya-Na Yang Mao-Qing Zhang Feng-Lin Yu Bing Han Ming-Yue Bao Yan He xing Li Yuan Zhang Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry(Shaanxi Normal University) The Ministry of EducationXi’an 710119China College of Life Sciences Shaanxi Normal UniversityXi’an 710119China

Multiple sclerosis(MS)is a chronic and incurable autoimmune disease of the central nervous system(CNS)that results in neuro-inflammation and *** therapies for MS alleviate symptoms to some extent but fail to realize myelin ***,it is crucial to identify effective targets to promote *** a widely expressed transcriptional regulator,peroxisome proliferatoractivated receptor-coactivator-1α(PGC-1α)expresses in different cells with high energy consumption,including skeletal muscle cells,brown fat cells,neurons,astrocytes,and oligodendrocyte precursor cell(OPC)[1].Targeting PGC-1αmay be beneficial for CNS development and various neurodegenerative diseases.

关键词： inflammation myelin autoimmune

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Detection of Nonlinear Behavior Induced by Hard Limiting in Voltage Source Converters in Wind Farms Based on Higher-order Spectral Analysis

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 630-645页

作者： Zetian Zheng Shaowei Huang Qiangsheng Bu chen Shen Jun Yan State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Grid Jiangsu Electric Power Co. Ltd.Research InstituteNanjingChina

In recent years, sub-synchronous oscillation accidents caused by wind power integration have received extensive attention. The recorded constant-amplitude waveforms can be induced by either linear or nonlinear oscillation mechanisms. Hence, the nonlinear behavior needs to be distinguished prior to choosing the analysis method. Since the 1960s, the higher-order statistics(HOS) theory has become a powerful tool for the detection of nonlinear behavior(DNB) in production quality control wherein it has mainly been applied to mechanical condition monitoring and fault diagnosis. This study focuses on the hard limiters of the voltage source converter(VSC) control systems in the wind farms and attempts to detect the nonlinear behavior caused by bi-or uni-lateral saturation hard limiting using the HOS analysis. First, the conventional describing function is extended to obtain the detailed frequency domain information on the bi-and uni-lateral saturation hard limiting. Furthermore, the bi-and tri-spectra are introduced as the HOS, which are extended into bi-and tri-coherence spectra to eliminate the effects of the linear parts on the harmonic characteristics of hard limiting in the VSC control system, respectively. The effectiveness of the HOS in the DNB and the classification of the hard-limiting types is proven, and its detailed derivation and estimation procedure is presented. Finally, the quadratic and cubic phase coupling in the signals is illustrated, and the performance of the proposed method is evaluated and discussed.

关键词： Bi-coherence spectrum detection of nonlinear behavior hard limiting higher-order statistics tri-coherence spectrum voltage source converter wind farms.

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威胁认知、相互依赖与美国盟国对“一带一路”的政策差异

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国际论坛 2024年第4期26卷 3-26,155页

作者：陈小鼎刘洋兰州大学印度研究中心兰州大学政治与国际关系学院兰州大学马克思主义学院兰州730000

随着世界政治极化的加剧,经济问题安全化与政治化趋势显著增强。“一带一路”倡议对恢复全球经济增长、扭转逆全球化趋势意义重大。“一带一路”倡议提出十余年来,国际社会积极响应,其中包括美国的部分盟国。然而,美国盟国对“一带一路... 详细信息

随着世界政治极化的加剧,经济问题安全化与政治化趋势显著增强。“一带一路”倡议对恢复全球经济增长、扭转逆全球化趋势意义重大。“一带一路”倡议提出十余年来,国际社会积极响应,其中包括美国的部分盟国。然而,美国盟国对“一带一路”倡议的回应存在较大差异。结合“一带一路”的推进状况,美国盟国的政策选择大体分为积极响应、明显反对、谨慎中立和左右摇摆四种类型。为解释美国盟国对“一带一路”共建呈现的差异化回应,本文构建起一个以安全层面的威胁认知和经济层面的相互依赖为自变量的分析框架,并选取泰国、日本、澳大利亚和以色列作为案例检验对象。当前世界变乱交织,国际失序风险持续增加。美国不断强化“泛安全化”认知,鼓动盟国放弃“安全靠美国、经济靠中国”的二元平衡战略,逐步转向经济与安全都依赖美国,国际合作严重倒退。为确保“一带一路”倡议的深入推进,中国须平衡“一带一路”共建国家尤其是周边国家对中国的经济依赖和安全诉求,最大限度地增信释疑,增强中国崛起的认同度。

关键词： “一带一路” 美国盟国政策差异威胁认知相互依赖

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Global characterization of OsPIP aquaporins reveals that the H_(2)O_(2)transporter OsPIP2;6 increases resistance to rice blast

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The Crop Journal 2024年第1期12卷 102-109页

作者： Gousi Li Jingluan Han chen Yi Hao Luo Yuzhu Wang Fengpin Wang Xiaoyu Wang Letian chen Yaling Zhang State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of Life SciencesSouth China Agricultural UniversityGuangzhou 510642GuangdongChina Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642GuangdongChina National Key Laboratory of Plant Molecular Genetics Shanghai Center for Plant Stress BiologyCAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China

Plasma membrane intrinsic proteins(PIPs)are conserved plant aquaporins that transport small molecules across the plasma membrane to trigger instant stress responses and maintain cellular homeostasis under biotic and abiotic *** elucidate their roles in plant immunity to pathogen attack,we characterized the expression patterns,subcellular localizations,and H_(2)O_(2)-transport ability of 11 OsPIPs in rice(Oryza sativa),and identified OsPIP2;6 as necessary for rice disease ***2;6 resides on the plasma membrane and facilitates cytoplasmic import of the immune signaling molecule H_(2)O_(2).Knockout of OsPIP2;6 increases rice susceptibility to Magnaporthe oryzae,indicating a positive function in plant ***2;6 interacts with OsPIP2;2,which has been reported to increase rice resistance to pathogens via H_(2)O_(2)*** findings suggest that OsPIP2;6 cooperates with OsPIP2;2 as a defense signal transporter complex during plant–pathogen interaction.

关键词： Aquaporin Plant immunity Rice blast H_(2)O_(2)transport

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Decentralized Primary Frequency Regulation for Hybrid Multi-terminal Direct Current Power Systems Considering Multi-source Enhancement

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 958-970页

作者： Jialiang Wu Zhen Wang Ruixu liu Yu Shan chenxuan Wang the College of Electrical Engineering Zhejiang UniversityHangzhou 310027China the Economic Research Institute of State Grid Zhejiang Electric Power Co. Ltd.Hangzhou 310016China

Hybrid multi-terminal direct current(MTDC)transmission technology has been a research focus,and primary frequency regulation(FR)improvement in the receiving-end system is one of the problems to be *** paper presents a decentralized primary FR scheme for hybrid MTDC power systems considering multi-source enhancement to help suppress frequency disturbance in the receiving-end *** the converters only need local frequency or DC voltage signal input to respond to system disturbance without communication or a control center,i.e.,a decentralized control *** proposed scheme can activate appropriate power sources to assist in FR in various system disturbance severities with fine-designed thresholds,ensuring sufficient utilization of each power *** better balance FR performance and FR resource participation,an evaluation index is proposed and the parameter optimization problem is further ***,the validity of the proposed scheme is verified by simulations in MATLAB/Simulink.

关键词： Decentralized control scheme primary frequency regulation(FR) rate of change of frequency(ROCOF) system frequency disturbance

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Development of a novel Eu^(3+)-doped tantalate red-emitting phosphor for w-LEDs application

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Journal of Rare Earths 2024年第8期42卷 1479-1488,I0003页

作者： Fan Zeng Jingjing Ru Bing Zhao Feiyun Guo Jianzhong chen College of Chemistry and Materials Fujian Province University Key Laboratory of Green Energy and Environment CatalysisNingde Normal University.Ningde352100China School of Environment and Resources School of Carbon Neutral and Modern IndustryFujian Normal UniversityFuzhou350007China College of Information and Mechanical&Electrical Engineering Ningde Normal UniversityNingde352100China College of Chemistry Fuzhou UniversityFuzhou350108China

Two novel phosphors LiBa_(4(1-x))Eu_(4x)Ta_(3)O_(12)(H-LBTO:xEu^(3+)) and Li_(0.25)Ba_(1-x)Eu_(x)Ta_(0.75)O_(3)(C-LBTO:xEu^(3+))were prepared successfully by a molten salt *** transformation between these two structures was realized by changing the sintering temperature or changing the Eu^(3+) ions concentration,which was also demonstrated by the X-ray diffraction(XRD),scanning electron microscopy(SEM),diffuse reflectance spectra(DRS),and photoluminescence excitation(PLE) analyses,Both the sintering temperature and the Eu^(3+)ions doping concentration have significant impact on the formation of the crystal *** these phosphors sintered at 1023 K exhibit two major luminescence lines at 594 and 614 nm under nearUV light of 395 nm excitation,corresponding to Eu^(3+)ions typical transitions of ^(5)D_(0)→^(7)F_(1) and ^(5)D_(0)→^(7)F_(2).The optimum concentration of Eu^(3+) ions is 9 mol% for C-LBTO:xEu^(3+) samples and the quenching interaction type is the nearest-neighbor ion *** thermal stability of the C-LBTO:0.09Eu^(3+)sample was investigated in detail and the device application further suggests that C-LBTO:0.09Eu^(3+) can be used as a red phosphor for near-UV excited w-LEDs in lighting.

关键词： Phosphor Tantalate LED device Rare earths

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Electrothermal Model Based Remaining Charging Time Prediction of Lithium-Ion Batteries against Wide Temperature Range

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 330-339页

作者： Rui Xiong Zian Zhao cheng chen xinggang Li Weixiang Shen School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyHawthornVIC 3122Australia

Battery remaining charging time(RCT)prediction can facilitate charging management and alleviate mileage anxiety for electric vehicles(EVs).Also,it is of great significance to improve EV users’***,the RCT for a lithiumion battery pack in EVs changes with temperature and other battery *** study proposes an electrothermal model-based method to accurately predict battery ***,a characteristic battery cell is adopted to represent the battery pack,thus an equivalent circuit model(ECM)of the characteristic battery cell is established to describe the electrical behaviors of a battery ***,an equivalent thermal model(ETM)of the battery pack is developed by considering the influence of ambient temperature,thermal management,and battery connectors in the battery pack to calculate the temperature which is then fed back to the ECM to realize electrothermal ***,the RCT prediction method is proposed based on the electrothermal model and validated in the wide temperature range from-20℃to 45℃.The experimental results show that the prediction error of the RCT in the whole temperature range is less than 1.5%.

关键词： Electric vehicles Lithium-ion batteries Remaining charging time Electrothermal model

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LncRNA-CCAT5-mediated crosstalk between Wnt/β-Catenin and STAT3 signaling suggests novel therapeutic approaches for metastatic gastric cancer with high Wnt activity

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Cancer Communications 2024年第1期44卷 76-100页

作者： chenchen liu Aiwen Shen Junquan Song Lei cheng Meng Zhang Yanong Wang Xiaowen liu Department of Gastric Surgery Fudan University Shanghai Cancer CenterShanghaiP.R.China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghaiP.R.China Department of Nephrology Shanghai Ninth People’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiP.R.China Department of Pulmonary Shanghai Chest HospitalShanghai Jiao Tong UniversityShanghaiP.R.China Department of Pathology Fudan University Shanghai Cancer CenterShanghaiP.R.China

Background:Although the constitutively activated Wnt/β-catenin signaling pathway plays vital roles in gastric cancer(GC)progression,few Wnt inhibitors are approved for clinical ***,the clinical significance of long non-coding RNAs(lncRNAs)in GC intraperitoneal dissemination(IPD)remains ***,we investigated the function and therapeutic potential of Wnt-transactivated lncRNA,colon cancer-associated transcript 5(CCAT5),in GC ***:LncRNA-sequencing assay was performed to document abun-dance changes of lncRNAs induced by Wnt family member 3A(Wnt3a)and degradation-resistantβ-catenin(S33Y mutated)in ascites-derived GC cells with low Wnt *** reporter,Chromatin immunoprecipitation(ChIP)-re-ChIP assays were performed to determine how CCAT5 was *** clinical significance of CCAT5 was examined in 2 cohorts of GC *** biological function of CCAT5 was investigated through gain-and loss-of-function *** molecular mechanism was explored through RNA-sequencing,mass spectrometry,and CRISPR/Cas9-knocknout *** therapeutic potential of CCAT5 was examined through RNAi-based cell xenograft model and patient-derived xenograft(PDX)model of ***:WeidentifiedanovelWnt-regulatedlncRNA,CCAT5,whichwastrans-activated by theβ-catenin/transcription factor 3(TCF3)***5 was significantly upregulated in GC and predicted poor *** studies confirmed the promotive role of CCAT5 in GC growth and ***-tically,CCAT5 bound to the C-end domain of signal transducer and activator of transcription 3(STAT3)and blocks Src homology 2 domain-containing protein tyrosine phosphatase 1(SHP-1)-mediated STAT3 Y705 dephosphorylation,leading to STAT3 nuclear entry and transactivation,thus accelerating GC ***,we demonstrated that both Wnt3a andβ-catenin acted as activa-tor of STAT3 signaling pathway,and the interplay between CCAT5 and STAT3 was functionally essential for Wnt-

关键词： CCAT5 gastric cancer intraperitoneal dissemination STAT3 Wnt/β-catenin

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Quantifying the impact of earthquakes and geological factors on spatial heterogeneity of debris-flow prone areas:A case study in the Hengduan Mountains

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Journal of Mountain Science 2024年第5期21卷 1522-1533页

作者： HU Xudong SHEN Yitong HU Kaiheng XU Wennian liu Daxiang HE Songtang GAO Jiazhen WEI Li liu Shuang Hubei Provincial Engineering Research Center of Slope Habitat Construction Technique Using Cement-based Materials(China Three Gorges University) Yichang 443002China Hubei Key Laboratory of Disaster Prevention and Mitigation(China Three Gorges University) Yichang 443002China College of Civil Engineering and Architecture China Three Gorges UniversityYichang 443002China Shanghai Investigation Design&Research Institute Co.Ltd.Shanghai 200335China Key Laboratory of Mountain Hazards and Earth Surface Processes Chinese Academy of SciencesChengdu 610041China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China Wuhan Polytechnic Wuhan 430074China

Understanding the spatial heterogeneity of debris-flow-prone areas holds significant implications for regional risk management, particularly in seismically active regions with geological faults. Despite the significance of this knowledge, a comprehensive quantification of the influence of regional topographical and geological factors on the spatial heterogeneity of debris-flow-prone areas has been lacking. This study selected the Hengduan Mountains, an earthquake-prone region characterized by diverse surface conditions and complex landforms, as a representative study area. An improved units zoning and objective factors identification methodology was employed in earthquake and fault analysis to assess the impact of seismic activity and geological factors on spatial heterogeneity of debrisflow prone areas. Results showed that the application of GIS technology with hydrodynamic intensity and geographical units analysis can effectively analyze debris-flow prone areas. Meanwhile, earthquake and fault zones obviously increase the density of debrisflow prone catchments and make them unevenly distributed. The number of debris-flow prone areas shows a nonlinear variation with the gradual increase of geomorphic factor value. Specifically, the area with 1000 m-2500 m elevation difference, 25°-30° average slope, and 0.13-0.15 land use index is the most favorable conditions for debris-flow occurrence;The average annual rainfall from 600 to 1150 mm and landslides gradient from 16° to 35° are the main causal factors to trigger debris flow. Our study sheds light on the quantification of spatial heterogeneity in debris flow-prone areas in earthquake-prone regions, which can offer crucial support for post-debris flow risk management strategies.

关键词： debris-flow prone areas causal factors GIS-based method spatial heterogeneity Hengduan Mountains

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