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Winter extreme precipitation over the Tibetan Plateau influenced by Arctic sea ice on interdecadal timescale

Advances in Climate Change Research 2024年第4期15卷 42-51页

作者： qing-Quan LI Miao BI Song YANG qing-Yuan WU yi-Hui DING Xin-Yong SHEN Xiao-Ting SUN Meng-Chu ZHAO China Meteorological Administration Key Laboratory for Climate Prediction Studies National Climate CentreBeijing 100081China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China CMA Key Open Laboratory of Transforming Climate Resources to Economy Chongqing Institute of Meteorological SciencesChongqing 401147China School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Sun Yat-sen University Zhuhai 519082China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China

The Tibetan Plateau(TP)and the Arctic are the most sensitive regions to global climate ***,the interdecadal varibility of winter extreme precipitation over the TP and its linkage with Arctic sea ice are still *** this study,the characteristics and mechisnems of the TP extreme precipitation(TPEP)influenced by Arctic sea ice on interdecadal timescale are studied based on the daily precipitation,monthly sea ice concentration and ERA5 reanalysis data from 1980 to *** found that the dominant mode of the TPEP in winter mostly exhibits a uniform spatial variation on the interdecadal timescale,with an opposite weak variation in the southeastern TP,and the Arctic sea ice concentration(SIC)before 2002 are larger than that after *** interdecadal variation of TPEP is affected by two teleconnection wave trains regulated by the Barents and Kara Sea *** the light ice years,a remarkable positive geopotential height(HGT)anomaly appears over the Barents-Kara Sea and a remarkable negative HGT anomaly is located over the Lake *** wave trains originating over the Barents-Kara Sea can be *** southern branch forms a wave train through the North Atlantic along the subtropical westerly jet stream,showing a‘+-+-+'pattern of HGT anomalies from Arctic to the *** HGT anomaly controls the western TP,which creates dynamic and water vapor conditions for the *** northern branch forms a wave train through the Lake Baikal and the southeast of the TP,showing a‘+-+'HGT anomaly *** HGT anomaly controls the southeastern TP,which is not conducive to precipitation in the *** the SIC in the Barents-Kara Sea increases,the situation is *** above analysis also reveals the reason for the difference in the east-west distribution of the TPEP.

关键词： Arctic sea ice Tibetan Plateau Winter extreme precipitation Rossby wave activity Interdecadal variation

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Study on a probabilistic algorithm for the forming and 3D characterization of special-shaped surfaces under profile grinding

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Advances in Manufacturing 2024年第2期12卷 288-299页

作者： Zhao-qing Zhang Kai-Ning Shi Yao-Yao Shi yi-Hui Song Zhe He Ya-Song Pu School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an710072People’s Republic of China Key Laboratory of High Performance Manufacturing for Aero Engine(Northwestern Polytechnical University) Ministry of Industry and Information TechnologyXi’an710072People’s Republic of China Engineering Research Center of Advanced Manufacturing Technology for Aero Engine(Northwestern Polytechnical University) Ministry of EducationXi’an710072People’s Republic of China

Profile grinding is the most crucial method for the ultra-precision machining of special-shaped ***,profile grinding produces a unique machining profile,and many random factors in the machining process lead to complex surface *** this study,the structural and probabilistic characteristics of the profile grinding of a special-shaped surface were analyzed,and a probabilistic algorithm for the forming and 3D characterization of special-shaped surfaces under profile grinding was *** forming process of a GH738 blade tenon tooth surface was considered as an example to demonstrate the *** comparison results showed that the simulation results had similar surface characteristics to the measurement results,and the relative error range of the 3D roughness parameter was 0.21%–19.76%,indicating an accurate prediction and characterization of the complex special-shaped surface under the action of multiple factors.

关键词： Special-shaped surface Profile grinding Surface morphology 3D characterization

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Adsorption and sensing characteristics of insulating gas C4F7N on 3d late transition metal-phthalocyanine:Theoretical and experimental study

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High Voltage 2024年第4期9卷 870-878页

作者： Dachang Chen Ziang Zheng Cong Zhang yi Luo Song Xiao qing Miao Ke Liu Beibei Xiao School of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhanChina Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion Institute of Electrical EngineeringChinese Academy of SciencesBeijingChina School of Electrical Engineering and Automation Wuhan UniversityWuhanChina School of Energy and Power Engineering Jiangsu University of Science and TechnologyZhenjiangChina

Heptafluoroisobutyronitrile(C_(4)F_(7)N)is being considered as a promising alternative to the greenhouse gas SF6 in the electrical ***,its biotoxicity necessitates the development of gas sensing technology to detect leaked C_(4)F_(7)N.A combination of density functional theory and experiments was employed to evaluate the adsorption and sensing performance of different metal-phthalocyanines as potential sensing materials for C_(4)F_(7)N *** study included exploring adsorption configurations with adsorption energies,electron transfer,and adsorption distance,as well as comparisons of electronic properties,electron distribution,and density of states(DOS)among the ***,gas sensing experiments were conducted using different MPcs to detect 25-100 ppm C_(4)F_(7)*** results revealed that Mn-Pc,Fe-Pc,Co-Pc,and Zn-Pc exhibited considerable chemical interactions,while Ni-Pc and Cu-Pc showed weaker adsorption *** findings were further elucidated based on the electron density and DOS of atomic ***,gas sensing experiments indicated that Co-Pc demonstrated a higher response compared to Fe-Pc at the same concentration of C_(4)F_(7)***,the theoretical and experimental insights offer valuable guidance for C_(4)F_(7)N detection and provide a systematic approach to screen and explore organometallic polymer-based gas sensors applicable in various fields.

关键词： adsorption phthalocyanine Adsorption

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The structure of TRAF7 coiled-coil trimer provides insight into its function in zebrafish embryonic development

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Journal of Molecular Cell Biology 2024年第1期16卷 43-53页

作者： Xiaozhen Song Ruixing Hu yi Chen Man Xiao Hong Zhang Shengnan Wu qing Lu Molecular Diagnostic Laboratory Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200040China Bio-X Institutes Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders(Ministry of Education)Shanghai Jiao Tong UniversityShanghai 200030China Laboratory of Development and Diseases and State Key Laboratory for Medical Genomics Shanghai Institute of HematologyRuĳin HospitalShanghai JiaoTong University School of MedicineShanghai 200025China

TRAF7 serves as a crucial intracellular adaptor and E3 ubiquitin ligase involved in signal transduction pathways,contributing to immune responses,tumor progression,and embryonic *** mutations within the coiled-coil(CC)domain and WD40 repeat domain of TRAF7 could cause brain tumors,while germline pathogenic mutations contribute to severe developmental ***,the precise molecular mechanism underlying TRAF7 involvement in embryonic development remains *** this study,we employed zebrafish as an in vivo model ***7 knock down caused defects in zebrafish embryonic *** determined the crystal structure of TRAF7 CC domain at 3.3Åresolution and found that the CC region trimerization was essential for TRAF7 functionality during zebrafish embryonic ***,disease-causing mutations in TRAF7 CC region could impair the trimer formation,consequently impacting early embryonic development of ***,our study sheds light on the molecular mechanism of TRAF7 CC trimer formation and its pivotal role in embryonic development.

关键词： TRAF7 coiled-coil domain crystal structure trimerization embryonic development

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Study on the local time asymmetry of the Earth's ring currents based on multiple low-Earth-orbit satellite magnetic observations

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Science China Technological Sciences 2024年第11期67卷 3354-3364页

作者： OU Jiaming JIANG yi YAN qing State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology Zhuhai MUST Science and Technology Research Institute Macau University of Science and Technology Macau Institute of Space Technology and Application

The azimuthal morphology of Earth's ring currents has consistently shown asymmetry during extreme space weather events at low latitudes, particularly during geomagnetic storms. A dawn-dusk pattern has been detected during the storm main phase through near-Earth and in-situ magnetic measurements. This asymmetry is believed to arise from asymmetric solar windmagnetosphere coupling and is linked to the closure of the ring current. Recent evidence has confirmed the existence of asymmetric ring currents during quiet times and the storm recovery phase. This phenomenon may be closely related to the evolution of ring currents, including plasma injection and decay processes. In this study, the local time asymmetry of the ring current is estimated using data from low-Earth-orbit Swarm and Macao Science Satellite-1(MSS-1) missions. Spherical harmonics models are developed to quantify the magnetic field of ring currents through external Gauss coefficients during both quiet periods and the storm recovery phase. Several features of dawn-dusk asymmetry are observed in various cases in different months.(1) The maximum difference in magnetic value across local time ranges from 3 to 10 nT, showing relative invariance compared with various Sym-H levels.(2) Stronger magnetic signals are detected at the premidnight sector during quiet times and at the afternoon sector during the storm recovery phase.(3) Magnetic perturbations remain at a lower level during the postmidnight and morning sectors. Although the pattern of local time asymmetry differs between quiet times and the recovery phase,dawn-dusk asymmetry remains the most pronounced feature, affecting the trapping and loss of charged particles in the inner magnetosphere. Combining Swarm and MSS-1 magnetic observations can enable convenient monitoring of the detailed azimuthal local time effects of the ring current at various disturbance levels in the future.

关键词： Earth’s ring currents local time asymmetry, SHA model Macao Science Satellite-1

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一种有效的自适应运动估计搜索算法

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计算机应用 2008年第6期28卷 1504-1506页

作者：石敏易清明暨南大学信息科学技术学院广州510632

提出了一种新的基于运动矢量场、方向自适应和半像素搜索的快速搜索算法(M-DAHS)。该算法根据图像序列运动矢量场的中心偏置性和时空相关性进行预判,对静止块设定阈值直接终止搜索;非静止块根据运动类型自适应选择搜索起始点和搜索策略... 详细信息

提出了一种新的基于运动矢量场、方向自适应和半像素搜索的快速搜索算法(M-DAHS)。该算法根据图像序列运动矢量场的中心偏置性和时空相关性进行预判,对静止块设定阈值直接终止搜索;非静止块根据运动类型自适应选择搜索起始点和搜索策略。搜索模板具有很强的方向自适应性,对于小运动块采用菱形-线性搜索,其他块使用六边形-菱形搜索算法。整像素搜索完毕后,再以十字优先原则进行半像素搜索。实验结果表明,该算法性能优越,搜索速度快,搜索精度高,且搜索精度可以非常接近全搜索算法。

关键词：运动估计块匹配算法视频编码半像素搜索

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Activation of glutamatergic neurons in the somatosensory cortex promotes remyelination in ischemic vascular dementia

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Fundamental Research 2024年第1期4卷 188-198页

作者： yi-Ting Zhou Da-Dao An yi-Xin Xu ying Zhou qing-qing Li Hai-Bin Dai Xiang-Nan Zhang yi Wang Min Lou Zhong Chen Wei-Wei Hu Department of Pharmacology and Department of Pharmacy of the Second Affiliated Hospital NHC and CAMS Key Laboratory of Medical NeurobiologySchool of Basic Medical SciencesCollege of Pharmaceutical SciencesZhejiang University School of MedicineHangzhou 310058China Department of Pharmacy Sir Run Run Shaw HospitalHangzhou 310012China Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province School of Pharmaceutical SciencesZhejiang Chinese Medical UniversityHangzhou 310053China Department of Neurology the Second Affiliated Hospital of Zhejiang UniversitySchool of MedicineHangzhou 310003China

Chronic cerebral hypoperfusion can cause progressive demyelination as well as ischemic vascular dementia,however no effective treatments are ***,based on magnetic resonance imaging studies of patients with white matter damage,we found that this damage is associated with disorganized cortical *** a mouse model,optogenetic activation of glutamatergic neurons in the somatosensory cortex significantly promoted oligodendrocyte progenitor cell(OPC)proliferation,remyelination in the corpus callosum,and recovery of cognitive ability after cerebral *** therapeutic effect of such stimulation was restricted to the upper layers of the cortex,but also spanned a wide time window after ***,enhancement of glutamatergic neuron-OPC functional synaptic connections is required to achieve the protection effect of activating cortical glutamatergic ***,skin stroking,an easier method to translate into clinical practice,activated the somatosensory cortex,thereby promoting OPC proliferation,remyelination and cognitive recovery following cerebral *** summary,we demonstrated that activating glutamatergic neurons in the somatosensory cortex promotes the proliferation of OPCs and remyelination to recover cognitive function after chronic cerebral *** should be noted that this activation may provide new approaches for treating ischemic vascular dementia via the precise regulation of glutamatergic neuron-OPC circuits.

关键词： Chronic cerebral hypoperfusion Optogenetic stimulation Oligodendrocyte progenitor cellIschemic vascular dementia Glutamatergic neuron Remyelination

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Will partial splenic embolization followed by splenectomy increase intraoperative bleeding?

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 318-330页

作者： Long Huang qing-Lin Li qing-Sheng Yu Hui Peng Zhou Zhen yi Shen Qi Zhang Department of No.1 Surgery The First Hospital Affiliated to Anhui University of Traditional Chinese MedicineHefei 230031Anhui ProvinceChina Anhui University of Traditional Chinese Medicine Anhui University of Traditional Chinese MedicineHefei 230038Anhui ProvinceChina Department of Surgery The Second Hospital Affiliated to Anhui University of Traditional Chinese MedicineHefei 230061Anhui ProvinceChina

BACKGROUND Partial splenic embolization(PSE)has been suggested as an alternative to splenectomy in the treatment of ***,some patients may experience recurrence of hypersplenism after PSE and require ***,there is a lack of evidence-based medical support regarding whether preoperative PSE followed by splenectomy can reduce the incidence of *** To investigate the safety and therapeutic efficacy of preoperative PSE followed by splenectomy in patients with cirrhosis and *** Between January 2010 and December 2021,321 consecutive patients with cirrhosis and hypersplenism underwent splenectomy at our *** on whether PSE was performed prior to splenectomy,the patients were divided into two groups:PSE group(n=40)and non-PSE group(n=281).Patient characteristics,postoperative complications,and follow-up data were compared between *** score matching(PSM)was conducted,and univariable and multivariable analyses were used to establish a nomogram predictive model for intraoperative bleeding(IB).The receiver operating characteristic curve,Hosmer-Lemeshow goodness-of-fit test,and decision curve analysis(DCA)were employed to evaluate the differentiation,calibration,and clinical performance of the *** After PSM,the non-PSE group showed significant reductions in hospital stay,intraoperative blood loss,and operation time(all P=0.00).Multivariate analysis revealed that spleen length,portal vein diameter,splenic vein diameter,and history of PSE were independent predictive factors for IB.A nomogram predictive model of IB was constructed,and DCA demonstrated the clinical utility of this *** groups exhibited similar results in terms of overall survival during the follow-up *** Preoperative PSE followed by splenectomy may increase the incidence of IB and a nomogram-based prediction model can predict the occurrence of IB.

关键词： Partial splenic embolization Splenectomy Hypertension,Portal Liver Cirrhosis Intraoperative bleeding

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Dual modification of LiNi_(0.83)Co_(0.11)Mn_(0.06)O_(2) cathode materials by K^(+) doping and Li_(3)PO_(4) coating for lithium ions batteries

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Rare Metals 2024年第7期43卷 3007-3018页

作者： Wei Xiao Jia-Le Wang Zhi-Cheng yi Cheng-Jin Liu Chang Miao Yu Xin Shu-qing Nie College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China

Li_(3)PO_(4)@Li_(0.99)K_(0.01)Ni_(0.83)Co_(0.11)Mn_(O.06)O_(2)(NCM-KP) cathode powders are synthesized via K^(+)doping in calcination processes and H_3PO_4 coating in sol-gel processes.K^(+) precisely enters into the lattice to widen the(003) plane to 0.4746 nm with a lower cationic disordered degree of 1.87%.Moreover,the surface residual lithium salts are treated by H_3PO_4 to generate a uniform Li_(3)PO_(4) coating layer of approximately 11.41 nm,which completely covers on the surface of secondary spherical particles to improve the interfacial *** 25℃,the NCM-KP electrode delivers a discharge specific capacity of 148.9 mAh·g^(-1) with a remarkable capacity retention ratio of 84.1% after 200 cycles at 1.0C and retains a high reversible specific capacity of 154.4 mAh·g^(-1) at *** at 1.0C and 60℃,it can maintain a reversible discharge specific capacity of 114.6 mAh·g^(-1) with 0.21% of capacity decay per cycle after 200 cycles,which is significantly lower than 0.40% for the pristine NCM ***,the charge transfer resistance of 238.89 Ω for the NCM-KP electrode is significantly lower than 947.41 Ω for the pristine NCM one by restricting the interfacial side ***,combining K+doping and Li_(3)PO_(4) coating is an effective strategy to enable the significant improvement of the electrochemical property of high-nickel cathode materials,which may be mainly attributed to the widened diffusion pathway and the formed Li_(3)PO_(4) protective layer,thus promoting Li~+diffusion rate and preventing the erosion of HF.

关键词： High-nickel cathode material Residual lithium K^(+)doping Li_(3)PO_(4)coating Lithium ions battery

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FAM53B promotes pancreatic ductal adenocarcinoma metastasis by regulating macrophage M2 polarization

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1479-1499页

作者： Xuan-Zeng Pei Min Cai Da-Wei Jiang Song-Hai Chen qing-qing Wang Hui-Min Lu yi-Fan Lu Department of Hepatological Surgery The First Hospital of JiaxingJiaxing 314000Zhejiang ProvinceChina Department of General Surgery West China Hospital of Sichuan UniversityChengdu 610044Sichuan ProvinceChina

BACKGROUND Our study investigated the role of FAM53B in regulating macrophage M2 polarization and its potential mechanisms in promoting pancreatic ductal adenocarcinoma(PDAC)*** To further investigate the role of FAM53B in regulating macrophage M2 polarization and its potential mechanism in promoting PDAC *** goal is to determine how FAM53B affects macrophage M2 polarization and to define its underlying mechanism in PDAC *** Cell culture and various experiments,including protein analysis,immunohisto-chemistry,and animal model experiments,were *** compared FAM53B expression between PDAC tissues and healthy tissues and assessed the correlation of FAM53B expression with clinical *** study analyzed the role of FAM53B in macrophage M2 polarization in vitro by examining the expression of relevant ***,we used a murine model to study the role of FAM53B in PDAC metastasis and analyzed the potential underlying *** Our research showed that there was a significant increase in FAM53B levels in PDAC tissues,which was linked to adverse tumor *** findings indicated that FAM53B can enhance macrophage M2 polarization,leading to increased anti-inflammatory factor *** results from the mouse model further supported the role of FAM53B in PDAC metastasis,as blocking FAM53B prevented tumor cell invasion and *** FAM53B promotes PDAC metastasis by regulating macrophage M2 *** discovery could lead to the development of new strategies for treating *** example,interfering with the FAM53B signaling pathway may prevent cancer *** research findings also provide important information for expanding our understanding of PDAC pathogenesis.

关键词： FAM53B Pancreatic ductal adenocarcinoma Tumor metastasis Macrophage polarization

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