Currently,artificial-membrane lungs consist of thousands of hollow fiber membranes where blood flows around the fibers and gas flows inside the fibers,achieving diffusive gas exchange.At both ends of the fibers,the in...Currently,artificial-membrane lungs consist of thousands of hollow fiber membranes where blood flows around the fibers and gas flows inside the fibers,achieving diffusive gas exchange.At both ends of the fibers,the interspaces between the hollow fiber membranes and the plastic housing are filled with glue to separate the gas from the blood phase.During a uniaxial centrifugation process,the glue forms the“potting.”The shape of the cured potting is then determined by the centrifugation process,limiting design possibilities and leading to unfavorable stagnation zones associated with blood clotting.In this study,a new multiaxial centrifugation process was developed,expanding the possible shapes of the potting and allowing for completely new module designs with potentially superior blood flow guidance within the potting margins.Two-phase simulations of the process in conceptual artificial lungs were performed to explore the possibilities of a biaxial centrifugation process and determine suitable parameter sets.A corresponding biaxial centrifugation setup was built to prove feasibility and experimentally validate four conceptual designs,resulting in good agreement with the simulations.In summary,this study shows the feasibility of a multiaxial centrifugation process allowing greater variety in potting shapes,eliminating inefficient stagnation zones and more favorable blood flow conditions in artificial lungs.展开更多
Spruce (Picea Smithiana) is an evergreen tree and distributed through the temperate Himalaya at the elevation of 2000 - 3500 m. Natural regeneration of spruce (Picea smithiana) is generally slow and almost negligible ...Spruce (Picea Smithiana) is an evergreen tree and distributed through the temperate Himalaya at the elevation of 2000 - 3500 m. Natural regeneration of spruce (Picea smithiana) is generally slow and almost negligible due to a number of factors e.g. presence of un decomposed raw humus on forest floor low germinative capacity of seed and infrequent good seed years. In order to supplement natural regeneration through artificial means, nursery raising assumes significance. The present study aimed at optimizing the root trainer container size and the potting mixture ingredients and their proportion for the production of quality nursery stock of Picea smithiana. Nine combinations of potting mixture ingredients (Forest Soil, Garden Soil, Sand, FYM and Lake weed) were tested in various ratios for the optimization of potty mixture in different root trainer sizes. Simultaneously, three different volumes (150cc, 250cc and 300cc) of root trainers were tested for suitability of container size. Chemical and physical analysis of potting mixture ingredients was carried out for better understanding of nutrient status. The best seedling growth at seven month age in terms of height (5.53 cm), Collar diameter (1.57 mm), fresh shoot weight (0.34 g), dry shoot weight (0.10 g), fresh root weight (0.27 g) , dry root weight (0.03 g), root shoot ratio(2:52), and total fresh biomass (0.61 g) were observed when seedlings were raised in root trainer container size (300cc) filled with potting mixture of (M8) Soil:Sand:FYM (1:1:2) and the lowest growth parameters were observed in root trainer container size (150cc) filled with forest soil only. Plantable quality seedlings can be recovered within a period of 7 months using potting mixture of Soil, Sand and FYM (1:1:2) and Soil, Sand and Lake weed (1:1:2) ratios in root trainer container size 300cc.展开更多
针对现有土石坝渗流监控指标拟定方法存在主观性较强和精度较低的不足,基于智能算法改进的超阈值(peaks over threshold,POT)模型,提出了优化的土石坝渗流监控指标拟定方法.以3σ准则为确定最优阈值的理论基础,采用基于混沌映射、结合L...针对现有土石坝渗流监控指标拟定方法存在主观性较强和精度较低的不足,基于智能算法改进的超阈值(peaks over threshold,POT)模型,提出了优化的土石坝渗流监控指标拟定方法.以3σ准则为确定最优阈值的理论基础,采用基于混沌映射、结合Levy飞行和逆向学习的动态选择策略改进的麻雀搜索算法(improved chaos sparrow search algorithm,ICSSA),对POT模型中阈值的选取方法进行优化.建立了ICSSA-POT模型,实现对监测资料尾部数据的拟合,从而得到更为合理的土石坝渗流监控指标.研究表明,相比于传统方法,所提方法可有效避免主观性与随机误差,得到的监测资料尾部数据的拟合决定系数提高了5%,具有更高的计算精度,拟定的渗流监控指标更偏于安全,对防范土石坝渗流破坏、确保土石坝安全长效运行具有较强的指导意义.展开更多
在“双碳”目标下石油化工等高碳排放企业进行低碳转型,降低碳排放已成为重要发展趋势,其中油气损耗在石化行业总能耗中占比较大。针对目前方法无法依据油气损耗数据变化规律自动识别高值点环节的问题,提出了一种基于过阈值模型的油气...在“双碳”目标下石油化工等高碳排放企业进行低碳转型,降低碳排放已成为重要发展趋势,其中油气损耗在石化行业总能耗中占比较大。针对目前方法无法依据油气损耗数据变化规律自动识别高值点环节的问题,提出了一种基于过阈值模型的油气损耗高值点环节自动识别方法。对胜利油田某采油区的35个环节进行油气损耗核算。依据核算数据尖峰厚尾的分布特征,利用过阈值模型分割油气损耗数据中的尾部数据并拟合其概率分布函数,依据3σ原则识别概率分布函数中对应的油气损耗高值点环节。结果确定高值点阈值为869.34 m 3/d,高值点环节识别准确率为0.986,相较于其他传统方法,该方法识别结果更准确,有利于损耗治理工作的高效展开。展开更多
Find It What did the old woman give Lucy?Once upon a time,a poor girl named Lucy lived in a small village.She was kind and helped others when she could.But she and her mother were often very hungry because they were p...Find It What did the old woman give Lucy?Once upon a time,a poor girl named Lucy lived in a small village.She was kind and helped others when she could.But she and her mother were often very hungry because they were poor.展开更多
Correction:J Cotton Res 8,27(2025)https://doi.org/10.1186/s42397-025-00228-y During the publication process of the original article(Soltani Toularoud et al.2025),the article title has been wrongly captured.Te article ...Correction:J Cotton Res 8,27(2025)https://doi.org/10.1186/s42397-025-00228-y During the publication process of the original article(Soltani Toularoud et al.2025),the article title has been wrongly captured.Te article title should be corrected from:of butisanstar and clopyralid herbicides on Gos-sypium hirsutum L.growth:insights from a pot experiment to:Residual efects of butisanstar and clopyralid herbi-cides on Gossypium hirsutum L.growth:insights from a pot experiment Te original article(Soltani Toularoud et al.2025)has been updated.Te publisher apologizes to the authors and readers for the inconvenience caused.展开更多
Pelargonium zonale is an important ornamental and medicinal plant.The purpose of this investigation was to evaluate the effects of conventional and unconventional fertilization on variations in the physicochemical par...Pelargonium zonale is an important ornamental and medicinal plant.The purpose of this investigation was to evaluate the effects of conventional and unconventional fertilization on variations in the physicochemical parameters of the culture substrate(temperature,pH,and electrical conductivity)in two cultivars of Pelargonium zonale(L.)L’Hér.,grown in pots.This study was conducted under greenhouse conditions,using Pindstrup peat as the culture substrate.The analysis focused on how these physicochemical indicators of peat influenced plant height and development under fertilization conditions.Results revealed that in the‘Tango Salmon’cultivar,both fertilization regimes significantly modified substrate temperature and electrical conductivity(conventional fertilization leading to the highest electric conductivity values of 0.77 mS/cm)while in control,was observed the highest substrate temperature(21.24℃).In contrast,pH remained relatively stable across treatments.In the‘Tango Dark Red’cultivar,no significant differences were observed between substrate physicochemical parameters regardless of treatment.The multiple correlations coefficients values showed that substrate parameters influenced plant height with varying degrees of intensity depending on cultivar and fertilization scheme,reaching up the highest predictability of 60.6%in the‘Tango Dark Red’control variant.The study highlighted that physicochemical properties of the substrate(particularly electric conductivity and temperature)are for were the main contributors to optimal plant development and should be carefully managed within fertilization strategies.展开更多
AUTONOMOUS buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed...In recent years,Beijing has seen the emergence of a lar...AUTONOMOUS buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed...In recent years,Beijing has seen the emergence of a large number of cutting-edge technology companies,confirming the city’s role as a melting pot of scientific innovation in China.展开更多
Hydrogen storage-a key hurdle for clean energy-has advanced with a pilot plant producing 150 tons of magnesium hydride annually since January 10,2025.Developed by a research team at the Dalian Institute of Chemical Ph...Hydrogen storage-a key hurdle for clean energy-has advanced with a pilot plant producing 150 tons of magnesium hydride annually since January 10,2025.Developed by a research team at the Dalian Institute of Chemical Physics(DICP)of the Chinese Academy of Sciences,the project uses a novel“one-pot”method to synthesize magnesium-based materials that store hydrogen safely and efficiently.展开更多
In the past century,industrial and economic growth relied heavily on fossil fuels such as coal,oil,and natural gas.As the society energy demands continue to grow,these fossil fuel reserves are depleted,leading to sign...In the past century,industrial and economic growth relied heavily on fossil fuels such as coal,oil,and natural gas.As the society energy demands continue to grow,these fossil fuel reserves are depleted,leading to significant environmental issues[1].Currently,sustainable biomass resources have attracted much attention as potential substitutes to fossil fuels for producing biofuels and commodity chemicals[2].展开更多
With a boom in its science and technology sector,Beijing is establishing itself as a hotbed of innovation Autonomous buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart ...With a boom in its science and technology sector,Beijing is establishing itself as a hotbed of innovation Autonomous buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed…In recent years,Beijing has seen the emergence of a large number of cutting-edge technology companies,confirming the city’s role as a melting pot of scientific innovation in China.展开更多
African swine fever(ASF),caused by the African swine fever virus(ASFV),has brought enormous economic loss and represents a major threat to the global pig industry(Vergne et al.2017).ASFVs are divided into 24 genotypes...African swine fever(ASF),caused by the African swine fever virus(ASFV),has brought enormous economic loss and represents a major threat to the global pig industry(Vergne et al.2017).ASFVs are divided into 24 genotypes based on their B646L gene,with only genotypes Ⅰ and Ⅱ circulating globally(Dixon et al.2019).展开更多
针对载荷谱时域外推中极值载荷预测的难点——厚尾特征估计,以及极值载荷的确定与识别,系统阐述了区组极大值模型(Block maximum method,BMM)、超阈值模型(Peak over threshold,POT),独立风暴理论模型(Method of independent storms,MI...针对载荷谱时域外推中极值载荷预测的难点——厚尾特征估计,以及极值载荷的确定与识别,系统阐述了区组极大值模型(Block maximum method,BMM)、超阈值模型(Peak over threshold,POT),独立风暴理论模型(Method of independent storms,MIS)3种极值模型的研究进展、数学理论、应用实践及对比分析,得出不同极值模型的优缺点及适用范围,为车辆载荷谱外推和耐久性评估提供了一定的理论参考。展开更多
文摘Currently,artificial-membrane lungs consist of thousands of hollow fiber membranes where blood flows around the fibers and gas flows inside the fibers,achieving diffusive gas exchange.At both ends of the fibers,the interspaces between the hollow fiber membranes and the plastic housing are filled with glue to separate the gas from the blood phase.During a uniaxial centrifugation process,the glue forms the“potting.”The shape of the cured potting is then determined by the centrifugation process,limiting design possibilities and leading to unfavorable stagnation zones associated with blood clotting.In this study,a new multiaxial centrifugation process was developed,expanding the possible shapes of the potting and allowing for completely new module designs with potentially superior blood flow guidance within the potting margins.Two-phase simulations of the process in conceptual artificial lungs were performed to explore the possibilities of a biaxial centrifugation process and determine suitable parameter sets.A corresponding biaxial centrifugation setup was built to prove feasibility and experimentally validate four conceptual designs,resulting in good agreement with the simulations.In summary,this study shows the feasibility of a multiaxial centrifugation process allowing greater variety in potting shapes,eliminating inefficient stagnation zones and more favorable blood flow conditions in artificial lungs.
文摘Spruce (Picea Smithiana) is an evergreen tree and distributed through the temperate Himalaya at the elevation of 2000 - 3500 m. Natural regeneration of spruce (Picea smithiana) is generally slow and almost negligible due to a number of factors e.g. presence of un decomposed raw humus on forest floor low germinative capacity of seed and infrequent good seed years. In order to supplement natural regeneration through artificial means, nursery raising assumes significance. The present study aimed at optimizing the root trainer container size and the potting mixture ingredients and their proportion for the production of quality nursery stock of Picea smithiana. Nine combinations of potting mixture ingredients (Forest Soil, Garden Soil, Sand, FYM and Lake weed) were tested in various ratios for the optimization of potty mixture in different root trainer sizes. Simultaneously, three different volumes (150cc, 250cc and 300cc) of root trainers were tested for suitability of container size. Chemical and physical analysis of potting mixture ingredients was carried out for better understanding of nutrient status. The best seedling growth at seven month age in terms of height (5.53 cm), Collar diameter (1.57 mm), fresh shoot weight (0.34 g), dry shoot weight (0.10 g), fresh root weight (0.27 g) , dry root weight (0.03 g), root shoot ratio(2:52), and total fresh biomass (0.61 g) were observed when seedlings were raised in root trainer container size (300cc) filled with potting mixture of (M8) Soil:Sand:FYM (1:1:2) and the lowest growth parameters were observed in root trainer container size (150cc) filled with forest soil only. Plantable quality seedlings can be recovered within a period of 7 months using potting mixture of Soil, Sand and FYM (1:1:2) and Soil, Sand and Lake weed (1:1:2) ratios in root trainer container size 300cc.
文摘在“双碳”目标下石油化工等高碳排放企业进行低碳转型,降低碳排放已成为重要发展趋势,其中油气损耗在石化行业总能耗中占比较大。针对目前方法无法依据油气损耗数据变化规律自动识别高值点环节的问题,提出了一种基于过阈值模型的油气损耗高值点环节自动识别方法。对胜利油田某采油区的35个环节进行油气损耗核算。依据核算数据尖峰厚尾的分布特征,利用过阈值模型分割油气损耗数据中的尾部数据并拟合其概率分布函数,依据3σ原则识别概率分布函数中对应的油气损耗高值点环节。结果确定高值点阈值为869.34 m 3/d,高值点环节识别准确率为0.986,相较于其他传统方法,该方法识别结果更准确,有利于损耗治理工作的高效展开。
文摘Find It What did the old woman give Lucy?Once upon a time,a poor girl named Lucy lived in a small village.She was kind and helped others when she could.But she and her mother were often very hungry because they were poor.
文摘Correction:J Cotton Res 8,27(2025)https://doi.org/10.1186/s42397-025-00228-y During the publication process of the original article(Soltani Toularoud et al.2025),the article title has been wrongly captured.Te article title should be corrected from:of butisanstar and clopyralid herbicides on Gos-sypium hirsutum L.growth:insights from a pot experiment to:Residual efects of butisanstar and clopyralid herbi-cides on Gossypium hirsutum L.growth:insights from a pot experiment Te original article(Soltani Toularoud et al.2025)has been updated.Te publisher apologizes to the authors and readers for the inconvenience caused.
文摘Pelargonium zonale is an important ornamental and medicinal plant.The purpose of this investigation was to evaluate the effects of conventional and unconventional fertilization on variations in the physicochemical parameters of the culture substrate(temperature,pH,and electrical conductivity)in two cultivars of Pelargonium zonale(L.)L’Hér.,grown in pots.This study was conducted under greenhouse conditions,using Pindstrup peat as the culture substrate.The analysis focused on how these physicochemical indicators of peat influenced plant height and development under fertilization conditions.Results revealed that in the‘Tango Salmon’cultivar,both fertilization regimes significantly modified substrate temperature and electrical conductivity(conventional fertilization leading to the highest electric conductivity values of 0.77 mS/cm)while in control,was observed the highest substrate temperature(21.24℃).In contrast,pH remained relatively stable across treatments.In the‘Tango Dark Red’cultivar,no significant differences were observed between substrate physicochemical parameters regardless of treatment.The multiple correlations coefficients values showed that substrate parameters influenced plant height with varying degrees of intensity depending on cultivar and fertilization scheme,reaching up the highest predictability of 60.6%in the‘Tango Dark Red’control variant.The study highlighted that physicochemical properties of the substrate(particularly electric conductivity and temperature)are for were the main contributors to optimal plant development and should be carefully managed within fertilization strategies.
文摘AUTONOMOUS buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed...In recent years,Beijing has seen the emergence of a large number of cutting-edge technology companies,confirming the city’s role as a melting pot of scientific innovation in China.
文摘Hydrogen storage-a key hurdle for clean energy-has advanced with a pilot plant producing 150 tons of magnesium hydride annually since January 10,2025.Developed by a research team at the Dalian Institute of Chemical Physics(DICP)of the Chinese Academy of Sciences,the project uses a novel“one-pot”method to synthesize magnesium-based materials that store hydrogen safely and efficiently.
基金funded by the Master,PhD Scholarship Programme of Vingroup Innovation Foundation(VINIF),code VINIF.2024.TS.035funded by Vietnam National University,Ho Chi Minh City(VNUHCM)under grant number NCM2024-18-01。
文摘In the past century,industrial and economic growth relied heavily on fossil fuels such as coal,oil,and natural gas.As the society energy demands continue to grow,these fossil fuel reserves are depleted,leading to significant environmental issues[1].Currently,sustainable biomass resources have attracted much attention as potential substitutes to fossil fuels for producing biofuels and commodity chemicals[2].
文摘With a boom in its science and technology sector,Beijing is establishing itself as a hotbed of innovation Autonomous buses gliding through the streets,satellites with flexible solar wings whizzing through space,smart electric vehicle factories running at full speed…In recent years,Beijing has seen the emergence of a large number of cutting-edge technology companies,confirming the city’s role as a melting pot of scientific innovation in China.
基金supported by the National Natural Science Fund for Distinguished Young Scholars of China(31925036 and 32025034)the Shandong Provincial Key R&D Program,China(2021LZGC001)+3 种基金the Biological Breeding-Major Projects,Institute of Zoology,Chinese Academy of Sciences and Institute of Animal Science,Chinese Academy of Agricultural Sciences(2023ZD04074 and 2023ZD0404604)the Special Project of Longhu Laboratory,China(LHLab_ZD20230012)the National Natural Science Foundation of China(32230100,32330099 and 32201257)the National Key Research and Development Program of China(2020YFA0509503,2022YFF0710703,2021YFA0805902 and 2022XAGG0121,2022YFF1002803).
文摘African swine fever(ASF),caused by the African swine fever virus(ASFV),has brought enormous economic loss and represents a major threat to the global pig industry(Vergne et al.2017).ASFVs are divided into 24 genotypes based on their B646L gene,with only genotypes Ⅰ and Ⅱ circulating globally(Dixon et al.2019).
文摘针对载荷谱时域外推中极值载荷预测的难点——厚尾特征估计,以及极值载荷的确定与识别,系统阐述了区组极大值模型(Block maximum method,BMM)、超阈值模型(Peak over threshold,POT),独立风暴理论模型(Method of independent storms,MIS)3种极值模型的研究进展、数学理论、应用实践及对比分析,得出不同极值模型的优缺点及适用范围,为车辆载荷谱外推和耐久性评估提供了一定的理论参考。
