Using a time series method that combines both the persistent scatterer and small baseline approaches, we analyzed 9 scenes Envisat ASAR data over the L＇Aquila earthquake, and obtained a Shocke＇s displacement field a...Using a time series method that combines both the persistent scatterer and small baseline approaches, we analyzed 9 scenes Envisat ASAR data over the L＇Aquila earthquake, and obtained a Shocke＇s displacement field and its evolution processes. The results show that： （1） Envisat ASAR clearly detected the whole processes of displacement field of the L＇Aquila earthquake, and distinct variations at different stages of the displacement field. （2） Preseismic creep displacement → displacement mutation when faulting → constantly slowed down after the earthquake. （3） The area of the strongest deformation and ground rupture was a low-lying oval depression region to the southeast. Surface faulting within a zone of about 22 km× 14 km, with an orientation of 135°, occurred along the NW-striking and SW-dipping Paganica-S. Demetrio normal fault. （4） In analyzing an area of about 54 km x 59 km, bounded by north-south axis to the epicenter, the displacement field has significant characteristics of a watershed： westward of the epicenter shows uplift with maximum of 130 mm in line-of-sight （LOS）, and east of the epicenter was a region with 220 mm of maximum subsidence in the LOS, concentrating on the rupture zone, the majority of which formed in the course of faulting and subsequence.展开更多
Background Previous studies on the risk factors and prognosis of acute stroke in pregnancy and puerperium(ASPP)mainly used European and American national healthcare databases,lacking detailed patient-level data and pr...Background Previous studies on the risk factors and prognosis of acute stroke in pregnancy and puerperium(ASPP)mainly used European and American national healthcare databases,lacking detailed patient-level data and precise event timing.Aim(1)To identify the risk factors and prognostic factors for ASPP,(2)to assess the risk of recurrent stroke,particularly during subsequent pregnancies,and(3)to evaluate offspring prognosis.Design This study is a retrospective,observational,nationwide,multicenter research project planned to include 400 ASPP patients from 36 centers across 22 provinces in China,from 2015 to 2024.ASPP is defined as acute ischemic or hemorrhagic stroke during pregnancy or within 6 weeks postpartum,confirmed by neuroimaging.Two matched groups will be included for comparison:400 pregnant/puerperal participants without a stroke history and 400 nonpregnant/puerperal participants with a recent stroke,matched by age and/or stroke etiology.Methods All participants will be followed up through telephone interviews.The initial follow-up is scheduled to take place between December 2024 and February 2025.The follow-up phase will consist of three rounds,each lasting 3 months and conducted every 3 years.Primary outcomes include unfavorable functional outcomes(mRS>2 or EQ-5D index score<0.7)at follow-up for Aim 1,recurrent strokes(neuroimaging-confirmed)for Aim 2,and neonatal asphyxia(Apgar scoring)and future development(ASQ-3)of offspring for Aim 3.Discussion The ASPP study is the first nationwide multicenter study to systematically evaluate the risk factors,prognosis,and risk of recurrent stroke in ASPP patients,particularly during subsequent pregnancies.This research may offer new insights into the long-term impacts of pregnancy-related stroke.展开更多
Two‐dimensional(2D)transition metal carbides,carbonitrides,and nitrides,known as MXenes,have been widely studied at the frontier of 2D materials.The excellent mechanical properties,electrical conductivity,excellent p...Two‐dimensional(2D)transition metal carbides,carbonitrides,and nitrides,known as MXenes,have been widely studied at the frontier of 2D materials.The excellent mechanical properties,electrical conductivity,excellent photoelectrical performance,and good thermal stability of MXenes enable wide applications in many fields,including but not limited to energy storage,supercapacitors,EMI shielding,catalysis,optoelectronics,and sensors.In particular,MXene‐based materials exhibit exceptional sensing performance due to their unique tunable surface chemistry,2D architecture,and exotic electrical/mechanical/electromechanical properties,which are rarely found in other materials.This paper discusses the MXene sensing properties and their mechanisms in different types of sensors,including piezoresistive sensors,flexible sensors,gas sensors,and biosensors.The unique roles of these MXene‐based sensors toward the future of smart living are also outlined.This article may shed light on the rational design of MXene‐based sensors and provide valuable references for corresponding scenario applications.展开更多
基金supported by Director Foundation of the Institute of Seismology,China Earthquake Administration(IS201266111)the Seism Science &Technology Spark Program of China Earthquake Administration(XH13036)Earthquake Industry Research Special Project(201308009)
文摘Using a time series method that combines both the persistent scatterer and small baseline approaches, we analyzed 9 scenes Envisat ASAR data over the L＇Aquila earthquake, and obtained a Shocke＇s displacement field and its evolution processes. The results show that： （1） Envisat ASAR clearly detected the whole processes of displacement field of the L＇Aquila earthquake, and distinct variations at different stages of the displacement field. （2） Preseismic creep displacement → displacement mutation when faulting → constantly slowed down after the earthquake. （3） The area of the strongest deformation and ground rupture was a low-lying oval depression region to the southeast. Surface faulting within a zone of about 22 km× 14 km, with an orientation of 135°, occurred along the NW-striking and SW-dipping Paganica-S. Demetrio normal fault. （4） In analyzing an area of about 54 km x 59 km, bounded by north-south axis to the epicenter, the displacement field has significant characteristics of a watershed： westward of the epicenter shows uplift with maximum of 130 mm in line-of-sight （LOS）, and east of the epicenter was a region with 220 mm of maximum subsidence in the LOS, concentrating on the rupture zone, the majority of which formed in the course of faulting and subsequence.
基金supported by the China Postdoctoral Science Foundation(2024M762182).
文摘Background Previous studies on the risk factors and prognosis of acute stroke in pregnancy and puerperium(ASPP)mainly used European and American national healthcare databases,lacking detailed patient-level data and precise event timing.Aim(1)To identify the risk factors and prognostic factors for ASPP,(2)to assess the risk of recurrent stroke,particularly during subsequent pregnancies,and(3)to evaluate offspring prognosis.Design This study is a retrospective,observational,nationwide,multicenter research project planned to include 400 ASPP patients from 36 centers across 22 provinces in China,from 2015 to 2024.ASPP is defined as acute ischemic or hemorrhagic stroke during pregnancy or within 6 weeks postpartum,confirmed by neuroimaging.Two matched groups will be included for comparison:400 pregnant/puerperal participants without a stroke history and 400 nonpregnant/puerperal participants with a recent stroke,matched by age and/or stroke etiology.Methods All participants will be followed up through telephone interviews.The initial follow-up is scheduled to take place between December 2024 and February 2025.The follow-up phase will consist of three rounds,each lasting 3 months and conducted every 3 years.Primary outcomes include unfavorable functional outcomes(mRS>2 or EQ-5D index score<0.7)at follow-up for Aim 1,recurrent strokes(neuroimaging-confirmed)for Aim 2,and neonatal asphyxia(Apgar scoring)and future development(ASQ-3)of offspring for Aim 3.Discussion The ASPP study is the first nationwide multicenter study to systematically evaluate the risk factors,prognosis,and risk of recurrent stroke in ASPP patients,particularly during subsequent pregnancies.This research may offer new insights into the long-term impacts of pregnancy-related stroke.
基金supported by the Fundamental Research Funds for the Central Universities(Grants 1082204112A26,20826044D3083,and 20822041G4080)Natural Science Foundation of Sichuan(Grant 2024NSFSC0233)+1 种基金National Natural Science Foundation of China(Grants 22209118 and 00301054A1073)Open research fund of State Key Laboratory of Mesoscience and Engineering(Grant MESO‐23‐D06).
文摘Two‐dimensional(2D)transition metal carbides,carbonitrides,and nitrides,known as MXenes,have been widely studied at the frontier of 2D materials.The excellent mechanical properties,electrical conductivity,excellent photoelectrical performance,and good thermal stability of MXenes enable wide applications in many fields,including but not limited to energy storage,supercapacitors,EMI shielding,catalysis,optoelectronics,and sensors.In particular,MXene‐based materials exhibit exceptional sensing performance due to their unique tunable surface chemistry,2D architecture,and exotic electrical/mechanical/electromechanical properties,which are rarely found in other materials.This paper discusses the MXene sensing properties and their mechanisms in different types of sensors,including piezoresistive sensors,flexible sensors,gas sensors,and biosensors.The unique roles of these MXene‐based sensors toward the future of smart living are also outlined.This article may shed light on the rational design of MXene‐based sensors and provide valuable references for corresponding scenario applications.
