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
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.
