Poplar wood,which was used as the absorption material for the solar-driven interfacial evaporation,was treated for 3 days,6 days and 9 days with the pectinase,and then was simulated for photothermal evaporation test a...Poplar wood,which was used as the absorption material for the solar-driven interfacial evaporation,was treated for 3 days,6 days and 9 days with the pectinase,and then was simulated for photothermal evaporation test at one standard solar radiation intensity(1 kW⋅m^(−2)).The effects of pectinase treatment on cell passage and water migration capacity of poplars were analyzed by the mercury intrusion porosimetry,the scanning electron microscope and fractal theory.It was found that the pit membrane and the ray parenchyma cells of poplar wood were degraded and destroyed after pectinase treatment.Compared with the untreated poplar wood,the evaporation rate of three sections of the specimen was changed.Especially the evaporation rate of radial and tangential direction was significantly increased.At the same time,based on the experimental data and fractal dimension deduction,fractal characteristics could be found in that the structure of poplars treated with pectinase.The porosity decreased with the increase of the fractal dimension in a certain range.It was shown that it is feasible to evaluate solar-driven water migration capacity by using fractal theory.展开更多
More and more embedded devices, such as mobile phones, tablet PCs and laptops, are used in every field, so huge files need to be stored or backed up into cloud storage. Optimizing the performance of cloud storage is v...More and more embedded devices, such as mobile phones, tablet PCs and laptops, are used in every field, so huge files need to be stored or backed up into cloud storage. Optimizing the performance of cloud storage is very important for Internet development. This paper presents the performance evaluation of the open source distributed storage system, a highly available, distributed, eventually consistent object/blob store from Open Stack cloud computing components. This paper mainly focuses on the mechanism of cloud storage as well as the optimization methods to process different sized files. This work provides two major contributions through comprehensive performance evaluations. First, it provides different configurations for Open Stack Swift system and an analysis of how every component affects the performance. Second, it presents the detailed optimization methods to improve the performance in processing different sized files. The experimental results show that our method improves the performance and the structure. We give the methods to optimize the object-based cloud storage system to deploy the readily available storage system.展开更多
Milk is considered a perfect natural food for humans and animals.However,aflatoxin B1(AFB1)contaminating the feeds fed to lactating dairy cows can introduce aflatoxin M1(AFM1),the main toxic metabolite of aflatoxins i...Milk is considered a perfect natural food for humans and animals.However,aflatoxin B1(AFB1)contaminating the feeds fed to lactating dairy cows can introduce aflatoxin M1(AFM1),the main toxic metabolite of aflatoxins into the milk,consequently posing a risk to human health.As a result of AFM1 monitoring in raw milk worldwide,it is evident that high AFM1 concentrations exist in raw milk in many countries.Thus,the incidence of AFM1 in milk from dairy cows should not be underestimated.To further optimize the intervention strategies,it is necessary to better understand the metabolism of AFB1 and its biotransformation into AFM1 and the specific secretion pathways in lactating dairy cows.The meta-bolism of AFB1 and its biotransformation into AFM1 in lactating dairy cows are drawn in this review.Furthermore,recent data provide evidence that in the mammary tissue of lactating dairy cows,aflatoxins significantly increase the activity of a protein,ATP-binding cassette super-family G member 2(ABCG2),an efflux transporter known to facilitate the excretion of various xenobiotics and veterinary drugs into milk.Further research should focus on identifying and understanding the factors that affect the expression of ABCG2 in the mammary gland of cows.展开更多
基金The authors’funding is supported by the Fundamental Research Funds Jiangsu Vocational College of Agriculture and Forestry(2021KJ20).
文摘Poplar wood,which was used as the absorption material for the solar-driven interfacial evaporation,was treated for 3 days,6 days and 9 days with the pectinase,and then was simulated for photothermal evaporation test at one standard solar radiation intensity(1 kW⋅m^(−2)).The effects of pectinase treatment on cell passage and water migration capacity of poplars were analyzed by the mercury intrusion porosimetry,the scanning electron microscope and fractal theory.It was found that the pit membrane and the ray parenchyma cells of poplar wood were degraded and destroyed after pectinase treatment.Compared with the untreated poplar wood,the evaporation rate of three sections of the specimen was changed.Especially the evaporation rate of radial and tangential direction was significantly increased.At the same time,based on the experimental data and fractal dimension deduction,fractal characteristics could be found in that the structure of poplars treated with pectinase.The porosity decreased with the increase of the fractal dimension in a certain range.It was shown that it is feasible to evaluate solar-driven water migration capacity by using fractal theory.
基金performed by key technology of networking media broadcast based on cloud computing in"China Twelfth Five-Year"Plan for Science&Technology Project(Grant No.:2013BAH65F01-2013BAH65F04)NSFC(Grant No.:61472144)+3 种基金National science and technology support plan(Grant No.:2013BAH65F03,2013BAH65F04)GDSTP(Grant No.:2013B010202004,2014A010103012)GDUPS(2011)Research Fund for the Doctoral Program of Higher Education of China(Grant No.:20120172110023)
文摘More and more embedded devices, such as mobile phones, tablet PCs and laptops, are used in every field, so huge files need to be stored or backed up into cloud storage. Optimizing the performance of cloud storage is very important for Internet development. This paper presents the performance evaluation of the open source distributed storage system, a highly available, distributed, eventually consistent object/blob store from Open Stack cloud computing components. This paper mainly focuses on the mechanism of cloud storage as well as the optimization methods to process different sized files. This work provides two major contributions through comprehensive performance evaluations. First, it provides different configurations for Open Stack Swift system and an analysis of how every component affects the performance. Second, it presents the detailed optimization methods to improve the performance in processing different sized files. The experimental results show that our method improves the performance and the structure. We give the methods to optimize the object-based cloud storage system to deploy the readily available storage system.
基金the Natural Science Foundation of Guangdong Province(2018A030313002)Special fund for scientific innovation strategy-construction of high-level Academy of Agriculture Science(R2017YJ-YB3006,R2018PY-QF008,R2018QD-072,R2018QD-074)Guangdong Modern Agro-industry Technology Research System(2019KJ114).
文摘Milk is considered a perfect natural food for humans and animals.However,aflatoxin B1(AFB1)contaminating the feeds fed to lactating dairy cows can introduce aflatoxin M1(AFM1),the main toxic metabolite of aflatoxins into the milk,consequently posing a risk to human health.As a result of AFM1 monitoring in raw milk worldwide,it is evident that high AFM1 concentrations exist in raw milk in many countries.Thus,the incidence of AFM1 in milk from dairy cows should not be underestimated.To further optimize the intervention strategies,it is necessary to better understand the metabolism of AFB1 and its biotransformation into AFM1 and the specific secretion pathways in lactating dairy cows.The meta-bolism of AFB1 and its biotransformation into AFM1 in lactating dairy cows are drawn in this review.Furthermore,recent data provide evidence that in the mammary tissue of lactating dairy cows,aflatoxins significantly increase the activity of a protein,ATP-binding cassette super-family G member 2(ABCG2),an efflux transporter known to facilitate the excretion of various xenobiotics and veterinary drugs into milk.Further research should focus on identifying and understanding the factors that affect the expression of ABCG2 in the mammary gland of cows.
