The current research on the blockchain includes study on network architecture and the incentive. In this paper, an introduction to the architecture of information technology was given and the goal and research status ...The current research on the blockchain includes study on network architecture and the incentive. In this paper, an introduction to the architecture of information technology was given and the goal and research status of the incentive layer of blockchain were illustrated with digital economy development as the backdrop. The existing issuance of token was elaborated from computation, storage and transmission, three core facets of network technology. The development of the token allocation and the path was analyzed to confirm its rationality. It discusses the possible directions and challenges of the future research on blockchain incentive.展开更多
Friedreich's ataxia(FRDA)is the most common neurodegenerative disease caused by an autosomal recessive singlegene mutation,affecting 2-4 per 100,000 Caucasians[1].The causative gene is frataxin(FXN),located on chr...Friedreich's ataxia(FRDA)is the most common neurodegenerative disease caused by an autosomal recessive singlegene mutation,affecting 2-4 per 100,000 Caucasians[1].The causative gene is frataxin(FXN),located on chromosome 9q13,and it encodes a 210-amino-acid mitochondrial matrix protein.展开更多
We report on the effects of forest management practices of understory removal and N-fixing species(Cassia alata) addition on soil CO2 fluxes in an Eucalyptus urophylla plantation(EUp),Acacia crassicarpa plantation(ACp...We report on the effects of forest management practices of understory removal and N-fixing species(Cassia alata) addition on soil CO2 fluxes in an Eucalyptus urophylla plantation(EUp),Acacia crassicarpa plantation(ACp),10-species-mixed plantation(Tp),and 30-species-mixed plantation(THp) using the static chamber method in southern China.Four forest management treatments,including(1) understory removal(UR);(2) C.alata addition(CA);(3) understory removal and replacement with C.alata(UR+CA);and(4) control without any disturbances(CK),were applied in the above four forest plantations with three replications for each treatment.The results showed that soil CO2 fluxes rates remained at a high level during the rainy season(from April to September),followed by a rapid decrease after October reaching a minimum in February.Soil CO2 fluxes were significantly higher(P < 0.01) in EUp(132.6 mg/(m2.hr)) and ACp(139.8 mg/(m2.hr)) than in Tp(94.0 mg/(m2.hr)) and THp(102.9 mg/(m2.hr)).Soil CO2 fluxes in UR and CA were significantly higher(P < 0.01) among the four treatments,with values of 105.7,120.4,133.6 and 112.2 mg/(m2.hr) for UR+CA,UR,CA and CK,respectively.Soil CO2 fluxes were positively correlated with soil temperature(P < 0.01),soil moisture(P < 0.01),NO3?-N(P < 0.05),and litterfall(P < 0.01),indicating that all these factors might be important controlling variables for soil CO2 fluxes.This study sheds some light on our understanding of soil CO2 flux dynamics in forest plantations under various management practices.展开更多
Starting from December 2019,Wuhan,China,encountered the first outbreak of coronavirus disease 2019(COVID-19)(1-2).The epidemic was successfully suppressed by strict containment so that the number of infected people wa...Starting from December 2019,Wuhan,China,encountered the first outbreak of coronavirus disease 2019(COVID-19)(1-2).The epidemic was successfully suppressed by strict containment so that the number of infected people was reduced to 0 on April 8,2020(3–4).After that,China experienced roughly 3 dozen outbreaks with local transmission caused by imported severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).展开更多
基金supported by the National Natural Science Foundation of China (21703050, 21271153, 21373181)China Postdoctoral Science Foun‐dation (512200‐X91701)Special Research Foundation of Young Teachers in Hangzhou Dianzi University (ZX150204307002/032)~~
文摘The current research on the blockchain includes study on network architecture and the incentive. In this paper, an introduction to the architecture of information technology was given and the goal and research status of the incentive layer of blockchain were illustrated with digital economy development as the backdrop. The existing issuance of token was elaborated from computation, storage and transmission, three core facets of network technology. The development of the token allocation and the path was analyzed to confirm its rationality. It discusses the possible directions and challenges of the future research on blockchain incentive.
基金supported by the National Natural Science Foundation of China(31871201 and 31371060).
文摘Friedreich's ataxia(FRDA)is the most common neurodegenerative disease caused by an autosomal recessive singlegene mutation,affecting 2-4 per 100,000 Caucasians[1].The causative gene is frataxin(FXN),located on chromosome 9q13,and it encodes a 210-amino-acid mitochondrial matrix protein.
基金supported by the National Natural Science Foundation of China (No. 30630015,30771704)
文摘We report on the effects of forest management practices of understory removal and N-fixing species(Cassia alata) addition on soil CO2 fluxes in an Eucalyptus urophylla plantation(EUp),Acacia crassicarpa plantation(ACp),10-species-mixed plantation(Tp),and 30-species-mixed plantation(THp) using the static chamber method in southern China.Four forest management treatments,including(1) understory removal(UR);(2) C.alata addition(CA);(3) understory removal and replacement with C.alata(UR+CA);and(4) control without any disturbances(CK),were applied in the above four forest plantations with three replications for each treatment.The results showed that soil CO2 fluxes rates remained at a high level during the rainy season(from April to September),followed by a rapid decrease after October reaching a minimum in February.Soil CO2 fluxes were significantly higher(P < 0.01) in EUp(132.6 mg/(m2.hr)) and ACp(139.8 mg/(m2.hr)) than in Tp(94.0 mg/(m2.hr)) and THp(102.9 mg/(m2.hr)).Soil CO2 fluxes in UR and CA were significantly higher(P < 0.01) among the four treatments,with values of 105.7,120.4,133.6 and 112.2 mg/(m2.hr) for UR+CA,UR,CA and CK,respectively.Soil CO2 fluxes were positively correlated with soil temperature(P < 0.01),soil moisture(P < 0.01),NO3?-N(P < 0.05),and litterfall(P < 0.01),indicating that all these factors might be important controlling variables for soil CO2 fluxes.This study sheds some light on our understanding of soil CO2 flux dynamics in forest plantations under various management practices.
基金Supported by the National Natural Science Foundation(grant number 71934002)of the People’s Republic of China.
文摘Starting from December 2019,Wuhan,China,encountered the first outbreak of coronavirus disease 2019(COVID-19)(1-2).The epidemic was successfully suppressed by strict containment so that the number of infected people was reduced to 0 on April 8,2020(3–4).After that,China experienced roughly 3 dozen outbreaks with local transmission caused by imported severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).
