This paper uses the Coupled Ocean-Atmosphere-Wave-Sediment Transport(COAWST)model to analyze the impact of typhoon‘Hongxia’on the velocity and position movement of the Kuroshio axis,the impact of typhoons on the Kur...This paper uses the Coupled Ocean-Atmosphere-Wave-Sediment Transport(COAWST)model to analyze the impact of typhoon‘Hongxia’on the velocity and position movement of the Kuroshio axis,the impact of typhoons on the Kuroshio intrusion into South China Sea(SCS),the corresponding water,heat,and salt fluxes,and the impact of Kuroshio water in the northeastern SCS.When typhoon‘Hongxia’passed,the Kuroshio intrusion into the SCS was the most significant at 21?N latitude.In the vertical direction,the Kuroshio intrusion was strongest in the subsurface layer,leading to the most significant changes in temperature and salinity in the northeastern part of the SCS in the subsurface layer.Under the influence of the southeastern monsoon in summer,a large amount of low-salinity water accumulates at the surface of the northeastern part of the SCS,and Kuroshio intrusive water remains in the bottom and middle portions of the subsurface layer.The westward deviation of the Kuroshio axis caused by the typhoon displays a certain lag compared with the hot and salty water intrusion into the SCS approximately 7 d later.The impact of the typhoon on the Kuroshio intrusion into the SCS lasts for 20 d.The typhoon caused increases in the water,heat,and salt fluxes associated with the Kuroshio intrusion into the SCS,and the contribution of the typhoon to these fluxes was as high as 40%.Under typhoon conditions,the maximum Kuroshio intrusion flux reached more than twice that before the typhoon.展开更多
大气集水(atmospheric water harvest,AWH)是一种从空气获取淡水的技术,对于缓解水资源危机具有潜在的应用前景.金属有机框架(metal-organic framework,MOF)是一种具有高比表面积、可调孔道结构的晶态多孔材料.MOF材料对水蒸气的逐级吸...大气集水(atmospheric water harvest,AWH)是一种从空气获取淡水的技术,对于缓解水资源危机具有潜在的应用前景.金属有机框架(metal-organic framework,MOF)是一种具有高比表面积、可调孔道结构的晶态多孔材料.MOF材料对水蒸气的逐级吸附和适中的脱附温度使得其在AWH领域具有较好的适用性.本文对近年来MOF材料在AWH领域的研究进展进行了系统综述,总结了MOF水吸附机理,梳理了用于AWH的MOF材料和装置及其集水性能.本文最后还从AWH装置产水效率、运行稳定性和MOF的可持续设计与合成等方面进行了展望,旨在为MOF材料在AWH领域的应用发展提供参考.展开更多
为了解决有机食品鉴别需要多种参数指标进行综合判定,制样过程繁琐,判别正确率偏低的问题,本研究提出一种基于稳定同位素比例质谱和液相色谱-高分辨质谱分析技术,结合偏最小二乘法判别分析(partial least squares-discriminant analysis...为了解决有机食品鉴别需要多种参数指标进行综合判定,制样过程繁琐,判别正确率偏低的问题,本研究提出一种基于稳定同位素比例质谱和液相色谱-高分辨质谱分析技术,结合偏最小二乘法判别分析(partial least squares-discriminant analysis,PLS-DA)的有机番茄鉴别方法。将采集的94个番茄样品(有机番茄50个,普通番茄44个)匀浆破碎、冷冻干燥后,分析并采集氮同位素比值(δ^(15)N)和液相色谱-高分辨质谱数据,应用PLS-DA方法提取数据信息,建立有机番茄判别模型,筛选并确证出其中判别的标志因子,包括氮同位素比值以及有机酸、黄酮类等13个特征化合物。所建立的模型对有机番茄的判别正确率为93.4%,基本可以满足有机番茄判别的需要。该研究为有机西红柿的快速判定提供了一种新的技术手段。展开更多
基金Tianjin Key Laboratory for Oceanic Meteorology for its support via the 2020 Open Fund Project(No.2020TKLOMZD01).
文摘This paper uses the Coupled Ocean-Atmosphere-Wave-Sediment Transport(COAWST)model to analyze the impact of typhoon‘Hongxia’on the velocity and position movement of the Kuroshio axis,the impact of typhoons on the Kuroshio intrusion into South China Sea(SCS),the corresponding water,heat,and salt fluxes,and the impact of Kuroshio water in the northeastern SCS.When typhoon‘Hongxia’passed,the Kuroshio intrusion into the SCS was the most significant at 21?N latitude.In the vertical direction,the Kuroshio intrusion was strongest in the subsurface layer,leading to the most significant changes in temperature and salinity in the northeastern part of the SCS in the subsurface layer.Under the influence of the southeastern monsoon in summer,a large amount of low-salinity water accumulates at the surface of the northeastern part of the SCS,and Kuroshio intrusive water remains in the bottom and middle portions of the subsurface layer.The westward deviation of the Kuroshio axis caused by the typhoon displays a certain lag compared with the hot and salty water intrusion into the SCS approximately 7 d later.The impact of the typhoon on the Kuroshio intrusion into the SCS lasts for 20 d.The typhoon caused increases in the water,heat,and salt fluxes associated with the Kuroshio intrusion into the SCS,and the contribution of the typhoon to these fluxes was as high as 40%.Under typhoon conditions,the maximum Kuroshio intrusion flux reached more than twice that before the typhoon.
文摘大气集水(atmospheric water harvest,AWH)是一种从空气获取淡水的技术,对于缓解水资源危机具有潜在的应用前景.金属有机框架(metal-organic framework,MOF)是一种具有高比表面积、可调孔道结构的晶态多孔材料.MOF材料对水蒸气的逐级吸附和适中的脱附温度使得其在AWH领域具有较好的适用性.本文对近年来MOF材料在AWH领域的研究进展进行了系统综述,总结了MOF水吸附机理,梳理了用于AWH的MOF材料和装置及其集水性能.本文最后还从AWH装置产水效率、运行稳定性和MOF的可持续设计与合成等方面进行了展望,旨在为MOF材料在AWH领域的应用发展提供参考.
文摘为了解决有机食品鉴别需要多种参数指标进行综合判定,制样过程繁琐,判别正确率偏低的问题,本研究提出一种基于稳定同位素比例质谱和液相色谱-高分辨质谱分析技术,结合偏最小二乘法判别分析(partial least squares-discriminant analysis,PLS-DA)的有机番茄鉴别方法。将采集的94个番茄样品(有机番茄50个,普通番茄44个)匀浆破碎、冷冻干燥后,分析并采集氮同位素比值(δ^(15)N)和液相色谱-高分辨质谱数据,应用PLS-DA方法提取数据信息,建立有机番茄判别模型,筛选并确证出其中判别的标志因子,包括氮同位素比值以及有机酸、黄酮类等13个特征化合物。所建立的模型对有机番茄的判别正确率为93.4%,基本可以满足有机番茄判别的需要。该研究为有机西红柿的快速判定提供了一种新的技术手段。
