In this paper, the relationship model between the oil volume and the vertically tilting parameter (α), the horizontally tilting parameter (β) and the displayed height of oil (h*) is first constructed with the tilted...In this paper, the relationship model between the oil volume and the vertically tilting parameter (α), the horizontally tilting parameter (β) and the displayed height of oil (h*) is first constructed with the tilted oil tank. Then, based on the data of the oil output volume at different time of day, an optimization model of oil-volume marking with tilted oil tank is established. Finally, parameters α = 2.2° and β = 3.05° are estimated by using nonlinear least squares method and the marking number of the tank-volume meter is given.展开更多
[Objective] The aim of this study was to investigate the effects of salt stress on cell expansion in Arabidopsis thaliana rosette leaves.[Method] Arabidopsis seedlings were treated by sodium chloride at the concentrat...[Objective] The aim of this study was to investigate the effects of salt stress on cell expansion in Arabidopsis thaliana rosette leaves.[Method] Arabidopsis seedlings were treated by sodium chloride at the concentration of 0,100 or 150 mmol/L. At the 7th and 14th d of treatment,with nail enamel printing mark method and computer software,the leaf blades area and abaxial epidermal pavement cells area was measured and compared using statistical analysis in Excel. [Result] The growth of Arabidopsis rosette leaves was inhibited under salt stress. Leaves treated for 7 or 14 d expanded less compared with controls. The salt-mediated decrease in leaf expansion is associated with a decrease in abaxial pavement cell expansion. [Conclusion] The decreased leaf and epidermal cell expansion under salt stress is the most important characteristic of plant physiological response to salt stress.展开更多
对基于HTTP live streaming(简称HLS)协议的流媒体直播系统的工作原理以及结构进行了系统的介绍,利用网络数据分析仪来深入研究客户端与服务器的交互传输过程,剖析了这种技术应用于网络电视直播时所存在的视频流索引文件重复下载的冗余...对基于HTTP live streaming(简称HLS)协议的流媒体直播系统的工作原理以及结构进行了系统的介绍,利用网络数据分析仪来深入研究客户端与服务器的交互传输过程,剖析了这种技术应用于网络电视直播时所存在的视频流索引文件重复下载的冗余问题,在一定程度上造成了网络流量的浪费,降低了传输效率.针对这类问题提出了一种改善的方法——标志法,即在.m3u8文件中添加一个新标签,并通过计算推导和实验验证把改善前后的效果进行了定量分析和对比,实验结果表明该方法可有效降低流量浪费率,提高传输性能,具有较大的可行性.展开更多
文摘In this paper, the relationship model between the oil volume and the vertically tilting parameter (α), the horizontally tilting parameter (β) and the displayed height of oil (h*) is first constructed with the tilted oil tank. Then, based on the data of the oil output volume at different time of day, an optimization model of oil-volume marking with tilted oil tank is established. Finally, parameters α = 2.2° and β = 3.05° are estimated by using nonlinear least squares method and the marking number of the tank-volume meter is given.
文摘[Objective] The aim of this study was to investigate the effects of salt stress on cell expansion in Arabidopsis thaliana rosette leaves.[Method] Arabidopsis seedlings were treated by sodium chloride at the concentration of 0,100 or 150 mmol/L. At the 7th and 14th d of treatment,with nail enamel printing mark method and computer software,the leaf blades area and abaxial epidermal pavement cells area was measured and compared using statistical analysis in Excel. [Result] The growth of Arabidopsis rosette leaves was inhibited under salt stress. Leaves treated for 7 or 14 d expanded less compared with controls. The salt-mediated decrease in leaf expansion is associated with a decrease in abaxial pavement cell expansion. [Conclusion] The decreased leaf and epidermal cell expansion under salt stress is the most important characteristic of plant physiological response to salt stress.
文摘对基于HTTP live streaming(简称HLS)协议的流媒体直播系统的工作原理以及结构进行了系统的介绍,利用网络数据分析仪来深入研究客户端与服务器的交互传输过程,剖析了这种技术应用于网络电视直播时所存在的视频流索引文件重复下载的冗余问题,在一定程度上造成了网络流量的浪费,降低了传输效率.针对这类问题提出了一种改善的方法——标志法,即在.m3u8文件中添加一个新标签,并通过计算推导和实验验证把改善前后的效果进行了定量分析和对比,实验结果表明该方法可有效降低流量浪费率,提高传输性能,具有较大的可行性.
