The effects of nitrate concentration in the main anoxic zone on denitrifying dephosphatation capability were conducted based on modified University of Cape Town （MUCT） process. Meanwhile the relation between optimal...The effects of nitrate concentration in the main anoxic zone on denitrifying dephosphatation capability were conducted based on modified University of Cape Town （MUCT） process. Meanwhile the relation between optimal nitrate concentration （Nopt） and influent C/N ratio was evaluated, in which the influont chemical oxygen demand （COD） concentration was stabilized at （2905：10）mg/L, the influent total phosphorus （TP） concentration was stabilized at （7.0±0. 5）mg/L. The results indicated that： （1） the nitrate concentration in the main anoxic zone had an effect on denitrifying dephosphatation capability, and the average percentages of anoxic phosphorus uptake in total phosphorus uptake （ηa） increased with nitrate cancentration increasing, i.e., increasing from 62.1% at2.0 mg/L to63.7%, 65.6%, 68.1%, and 72.3% at 2.2, 2.4, 2.6 and 2.8mg/L, respectively; （2） the Nopt as function of influent C/N ratio could be calculated by the equation： y = 0.67x^2-7.79x ＋ 22. 21; the maximum percentages of anoxic phosphorus uptake in total phosphorus uptake （ηa,max） as function of the Nopt could be calculated by the equation： y=0.77-0.33e^-（x/1.52）. The Nopt was the important control parameter that must be optimized for operation of conveational biological nutrieat removal activated sludge （BNRAS） system.展开更多
Lalcifying fibrous pseudotumor （CFP） is one of the most unusual benign lesions and its histopathological appearance defined only during the last 15 years. It is characterized by dense, hyalinised collagenous tissue ...Lalcifying fibrous pseudotumor （CFP） is one of the most unusual benign lesions and its histopathological appearance defined only during the last 15 years. It is characterized by dense, hyalinised collagenous tissue interspersed with benign spindle cells,lymphoplasmocytic psammomatous and/or infiltrate and particularly, dystrophic calcifications.An exhaustive search has shown that only 70 cases of this rare entity have been recorded in English：展开更多
Drought is one of the most catastrophic natural disasters and can be effectively monitored via remote sensing.Derived from Fengyun-3D(FY3D)products from 2021 to 2023,the Temperature Vegetation Dryness Index(TVDI),whic...Drought is one of the most catastrophic natural disasters and can be effectively monitored via remote sensing.Derived from Fengyun-3D(FY3D)products from 2021 to 2023,the Temperature Vegetation Dryness Index(TVDI),which is a classical remote-sensing-based drought index,was proposed to capture typical drought characteristics across diverse regions and land-cover types.Relative soil moisture data obtained from the China Meteorological Administration Land Data Assimilation System(CLDAS)and vegetation net primary productivity(NPP)from the Atmosphere-Vegetation Interaction Model were further utilized to quantify TVDI sensitivity and evaluate its impacts.It was clear that TVDI successfully extracted the most severe drought events in southern China,exhibiting a significantly higher correlation coefficient with the minimum value of relative soil moisture than that obtained from the average value.In general,TVDI was negatively correlated with relative soil moisture and NPP,with the strength of these correlations gradually weakening as soil depth increased.Among land-cover types,TVDI performed best in depicting drought in cropland,followed by grassland and forest.These results can promote our acknowledgement of the typical drought characteristics and their impacts on vegetation,thereby providing valuable guidance for drought prevention strategies.展开更多
选用美国LAPS(Local Analysis and Prediction System)数据融合系统对中国风云(FY)和海洋(HY)卫星在我国东部海域SST反演数据进行融合处理。该融合系统能够协调区域大气和下垫面海洋要素的时空特征,协调不同要素间的特征状态及匹配规律...选用美国LAPS(Local Analysis and Prediction System)数据融合系统对中国风云(FY)和海洋(HY)卫星在我国东部海域SST反演数据进行融合处理。该融合系统能够协调区域大气和下垫面海洋要素的时空特征,协调不同要素间的特征状态及匹配规律,生成适合多要素诊断计算的区域规范化数据。针对该系统没有现成的卫星SST反演数据输入接口,对船舶站SST反演数据接口进行了数值调整;依据FY卫星及HY卫星SST数据的不同特点,尤其是随卫星轨道发生的不同时空变化,在输入卫星反演数据至LAPS系统之前,进行了多项预处理,包括对卫星反演数据异常值的判别与剔除、海陆边界要素异常梯度的鉴别与去除、不同卫星轨道坐标系网格要素的规范化处理、平滑去噪音等。经多项验证,预处理后的FY和HY卫星监测反演数据更有利于LAPS系统资料融合效果的正确性与合理性。再经LAPS系统的数据融合处理和各项验证,融合场既能保持卫星SST精细化的时空特征描述,也弥补了卫星资料非区域全覆盖的局限。将SST融合场对寒潮与冷空气过程中的东部海域海气影响进行热动力物理量时空变化诊断应用,对海面SST和感热通量的中尺度强度演变、南北空间变化差异均给出了量化描述。展开更多
基金Water Pollution Control and Management of Science and Technology Majon Projects (No.2008ZX07207005)The Programs for Development of Science and Technology of Jilin Province of China (No.20071105)
文摘The effects of nitrate concentration in the main anoxic zone on denitrifying dephosphatation capability were conducted based on modified University of Cape Town （MUCT） process. Meanwhile the relation between optimal nitrate concentration （Nopt） and influent C/N ratio was evaluated, in which the influont chemical oxygen demand （COD） concentration was stabilized at （2905：10）mg/L, the influent total phosphorus （TP） concentration was stabilized at （7.0±0. 5）mg/L. The results indicated that： （1） the nitrate concentration in the main anoxic zone had an effect on denitrifying dephosphatation capability, and the average percentages of anoxic phosphorus uptake in total phosphorus uptake （ηa） increased with nitrate cancentration increasing, i.e., increasing from 62.1% at2.0 mg/L to63.7%, 65.6%, 68.1%, and 72.3% at 2.2, 2.4, 2.6 and 2.8mg/L, respectively; （2） the Nopt as function of influent C/N ratio could be calculated by the equation： y = 0.67x^2-7.79x ＋ 22. 21; the maximum percentages of anoxic phosphorus uptake in total phosphorus uptake （ηa,max） as function of the Nopt could be calculated by the equation： y=0.77-0.33e^-（x/1.52）. The Nopt was the important control parameter that must be optimized for operation of conveational biological nutrieat removal activated sludge （BNRAS） system.
文摘Lalcifying fibrous pseudotumor （CFP） is one of the most unusual benign lesions and its histopathological appearance defined only during the last 15 years. It is characterized by dense, hyalinised collagenous tissue interspersed with benign spindle cells,lymphoplasmocytic psammomatous and/or infiltrate and particularly, dystrophic calcifications.An exhaustive search has shown that only 70 cases of this rare entity have been recorded in English：
基金Innovation and Development Special Project of the China Meteorological Administration(CXFZ2024J051)National Key R&D Program of China(2022YFD2300200)。
文摘Drought is one of the most catastrophic natural disasters and can be effectively monitored via remote sensing.Derived from Fengyun-3D(FY3D)products from 2021 to 2023,the Temperature Vegetation Dryness Index(TVDI),which is a classical remote-sensing-based drought index,was proposed to capture typical drought characteristics across diverse regions and land-cover types.Relative soil moisture data obtained from the China Meteorological Administration Land Data Assimilation System(CLDAS)and vegetation net primary productivity(NPP)from the Atmosphere-Vegetation Interaction Model were further utilized to quantify TVDI sensitivity and evaluate its impacts.It was clear that TVDI successfully extracted the most severe drought events in southern China,exhibiting a significantly higher correlation coefficient with the minimum value of relative soil moisture than that obtained from the average value.In general,TVDI was negatively correlated with relative soil moisture and NPP,with the strength of these correlations gradually weakening as soil depth increased.Among land-cover types,TVDI performed best in depicting drought in cropland,followed by grassland and forest.These results can promote our acknowledgement of the typical drought characteristics and their impacts on vegetation,thereby providing valuable guidance for drought prevention strategies.
文摘选用美国LAPS(Local Analysis and Prediction System)数据融合系统对中国风云(FY)和海洋(HY)卫星在我国东部海域SST反演数据进行融合处理。该融合系统能够协调区域大气和下垫面海洋要素的时空特征,协调不同要素间的特征状态及匹配规律,生成适合多要素诊断计算的区域规范化数据。针对该系统没有现成的卫星SST反演数据输入接口,对船舶站SST反演数据接口进行了数值调整;依据FY卫星及HY卫星SST数据的不同特点,尤其是随卫星轨道发生的不同时空变化,在输入卫星反演数据至LAPS系统之前,进行了多项预处理,包括对卫星反演数据异常值的判别与剔除、海陆边界要素异常梯度的鉴别与去除、不同卫星轨道坐标系网格要素的规范化处理、平滑去噪音等。经多项验证,预处理后的FY和HY卫星监测反演数据更有利于LAPS系统资料融合效果的正确性与合理性。再经LAPS系统的数据融合处理和各项验证,融合场既能保持卫星SST精细化的时空特征描述,也弥补了卫星资料非区域全覆盖的局限。将SST融合场对寒潮与冷空气过程中的东部海域海气影响进行热动力物理量时空变化诊断应用,对海面SST和感热通量的中尺度强度演变、南北空间变化差异均给出了量化描述。
