Since the volume variation of silicon particles during cycling,the binding spots between Cu current collector and silicon anode raised to be one of the critical binding problems.In this work,an amino-modified Cu curre...Since the volume variation of silicon particles during cycling,the binding spots between Cu current collector and silicon anode raised to be one of the critical binding problems.In this work,an amino-modified Cu current collector(Cu^(*))is fabricated to tackle this issue.The amino groups on Cu^(*)surface increase its hydrophilicity,which is conducive to the curing process of aqueous slurry on its surface.Meanwhile,these amino groups can form abundant amide bonds with carboxyl groups from the adopted polyacrylic acid(PAA)binder.The combined action composed of the covalent bond and mechanical interlocking could reduce the contact loss inside the electrode.However,high concentration silane coupling agent treatment will weaken the surface roughness of Cu^(*)and weaken mechanical interlocking.What is more,the insulation of silane coupling agent reduces the conductivity of Cu and increases the impedance of battery.Considering the effect of silane coupling agent comprehensively,electrochemical performance of Cu^(*)-0.05%is best.展开更多
Cotton(Gossypium spp.) yield is reduced by stress. In this study, high temperature(HT) suppressed the expression of the jasmonic acid(JA) biosynthesis gene allene oxide cyclase 2(GhAOC2), reducing JA content and causi...Cotton(Gossypium spp.) yield is reduced by stress. In this study, high temperature(HT) suppressed the expression of the jasmonic acid(JA) biosynthesis gene allene oxide cyclase 2(GhAOC2), reducing JA content and causing male sterility in the cotton HT-sensitive line H05. Anther sterility was reversed by exogenous application of methyl jasmonate(MeJA) to early buds. To elucidate the role of GhAOC2 in JA biosynthesis and identify its putative contribution to the anther response to HT, we created gene knockout cotton plants using the CRISPR/Cas9 system. Ghaoc2 mutant lines showed male-sterile flowers with reduced JA content in the anthers at the tetrad stage(TS), tapetum degradation stage(TDS), and anther dehiscence stage(ADS). Exogenous application of MeJA to early mutant buds(containing TS or TDS anthers) rescued the sterile pollen and indehiscent anther phenotypes, while ROS signals were reduced in ADS anthers. We propose that HT downregulates the expression of GhAOC2 in anthers, reducing JA biosynthesis and causing excessive ROS accumulation in anthers, leading to male sterility. These findings suggest exogenous JA application as a strategy for increasing male fertility in cotton under HT.展开更多
在物联网中,边缘计算能够提供物联网计算的实时性,减少网络中数据的传输量。为了适应物联网技术的发展,研究了采用软件定义网络(SDN,software defined networking)架构的物联网网络,并利用SDN提供的方法对网络中的流量进行测量。细粒度...在物联网中,边缘计算能够提供物联网计算的实时性,减少网络中数据的传输量。为了适应物联网技术的发展,研究了采用软件定义网络(SDN,software defined networking)架构的物联网网络,并利用SDN提供的方法对网络中的流量进行测量。细粒度流量测量可以更准确地描述网络中的流量,但同时也需要消耗大量的测量开销。为了减少测量过程中产生的开销并获得近似的细粒度测量,提出了一种面向边缘计算的物联网网络流量测量方案。新测量架构采用粗粒度测量和插值优化等方法进行测量。首先,在文中采用随机抽样方法通过OpenFlow协议快速获得粗粒度的网络流量测量。接着,对粗粒度的网络流量进行插值恢复,并利用多约束的优化方法对插值结果进行优化,直到找到满足条件约束的最优细粒度流量测量结果。最后,文中通过实验验证了所提出的测量方法的可行性和有效性。展开更多
基金Project(2019R01006)supported by the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang Province,ChinaProject(2018YFB0104300)supported by the National Key R&D Program of China。
文摘Since the volume variation of silicon particles during cycling,the binding spots between Cu current collector and silicon anode raised to be one of the critical binding problems.In this work,an amino-modified Cu current collector(Cu^(*))is fabricated to tackle this issue.The amino groups on Cu^(*)surface increase its hydrophilicity,which is conducive to the curing process of aqueous slurry on its surface.Meanwhile,these amino groups can form abundant amide bonds with carboxyl groups from the adopted polyacrylic acid(PAA)binder.The combined action composed of the covalent bond and mechanical interlocking could reduce the contact loss inside the electrode.However,high concentration silane coupling agent treatment will weaken the surface roughness of Cu^(*)and weaken mechanical interlocking.What is more,the insulation of silane coupling agent reduces the conductivity of Cu and increases the impedance of battery.Considering the effect of silane coupling agent comprehensively,electrochemical performance of Cu^(*)-0.05%is best.
基金funding support from the National Natural Science Foundation of China (32072024)the Fundamental Research Funds for the Central Universities (2021ZKPY019)the National Key Research and Development Program of China (2018YFD0100403, 2016YFD0101402)。
文摘Cotton(Gossypium spp.) yield is reduced by stress. In this study, high temperature(HT) suppressed the expression of the jasmonic acid(JA) biosynthesis gene allene oxide cyclase 2(GhAOC2), reducing JA content and causing male sterility in the cotton HT-sensitive line H05. Anther sterility was reversed by exogenous application of methyl jasmonate(MeJA) to early buds. To elucidate the role of GhAOC2 in JA biosynthesis and identify its putative contribution to the anther response to HT, we created gene knockout cotton plants using the CRISPR/Cas9 system. Ghaoc2 mutant lines showed male-sterile flowers with reduced JA content in the anthers at the tetrad stage(TS), tapetum degradation stage(TDS), and anther dehiscence stage(ADS). Exogenous application of MeJA to early mutant buds(containing TS or TDS anthers) rescued the sterile pollen and indehiscent anther phenotypes, while ROS signals were reduced in ADS anthers. We propose that HT downregulates the expression of GhAOC2 in anthers, reducing JA biosynthesis and causing excessive ROS accumulation in anthers, leading to male sterility. These findings suggest exogenous JA application as a strategy for increasing male fertility in cotton under HT.
文摘在物联网中,边缘计算能够提供物联网计算的实时性,减少网络中数据的传输量。为了适应物联网技术的发展,研究了采用软件定义网络(SDN,software defined networking)架构的物联网网络,并利用SDN提供的方法对网络中的流量进行测量。细粒度流量测量可以更准确地描述网络中的流量,但同时也需要消耗大量的测量开销。为了减少测量过程中产生的开销并获得近似的细粒度测量,提出了一种面向边缘计算的物联网网络流量测量方案。新测量架构采用粗粒度测量和插值优化等方法进行测量。首先,在文中采用随机抽样方法通过OpenFlow协议快速获得粗粒度的网络流量测量。接着,对粗粒度的网络流量进行插值恢复,并利用多约束的优化方法对插值结果进行优化,直到找到满足条件约束的最优细粒度流量测量结果。最后,文中通过实验验证了所提出的测量方法的可行性和有效性。
