[目的/意义]文章批判性研究了信息素养项目(Project Information Literacy,简称PIL)的主要研究成果与核心发现,旨在为中国的信息素养研究与实践提供参考。[方法/过程]作者通过历史分期、文献调查等方法,全面梳理了PIL主要研究成果和核...[目的/意义]文章批判性研究了信息素养项目(Project Information Literacy,简称PIL)的主要研究成果与核心发现,旨在为中国的信息素养研究与实践提供参考。[方法/过程]作者通过历史分期、文献调查等方法,全面梳理了PIL主要研究成果和核心发现,指出其系统梳理了不同情境下大学生的信息行为,全面总结了大学生身份转变中的信息挑战,并且针对不同群体提出了促进大学生学习研究的建议。[结果/结论]PIL项目为信息素养理论与实践工作提供一定的经验借鉴:(1)紧跟时代发展,重视大学生信息素养的持续变化;(2)整合多方力量,构建大型研究项目的长效机制;(3)理论联系实践,重视信息素养研究的实际作用。展开更多
基于自主设计的TTP/C(时间触发协议)总线控制器,提出了开放式DEEC(发动机数字式电子控制器)的冗余架构,将其划分为输入、核心计算及输出3种智能节点,并制定了各个智能节点的任务调度规划图.设计了基于DSP(digital signal processor)+FPG...基于自主设计的TTP/C(时间触发协议)总线控制器,提出了开放式DEEC(发动机数字式电子控制器)的冗余架构,将其划分为输入、核心计算及输出3种智能节点,并制定了各个智能节点的任务调度规划图.设计了基于DSP(digital signal processor)+FPGA(field-programmable gate array)的智能节点硬件平台,在此基础上完成各智能节点的软件设计.最后构建了开放式DEEC的PIL(process in the loop)仿真测试平台,以发动机模型为控制对象,展开了状态调节试验和总线故障注入试验.试验结果证明该开放式DEEC是可行的,并具有良好的重构特性.展开更多
Objective:Plant hormones act as chemical messengers in the regulation of plant development and metabolism.The production of ginsenosides in Panax hybrid is promoted by auxins that are transported and accumulated by PI...Objective:Plant hormones act as chemical messengers in the regulation of plant development and metabolism.The production of ginsenosides in Panax hybrid is promoted by auxins that are transported and accumulated by PIN-FORMED(PIN)and PIN-LIKES(PILS)auxin transporters.However,genome-wide studies of PIN/PILS of ginseng are still scarce.In current study,identification and transcriptional profiling of PIN/PILS gene families,as well as their potential relationship with ginsenoside biosynthesis in Panax ginseng were investigated.Methods:PIN/PILS genes in P.ginseng was identified via in silico genome-wide analysis,followed by phylogenetic relationships,gene structure,and protein profiles investigation.Moreover,previously reported RNA-sequence data from various tissues and roots after infection were utilized for PIN/PILS genes expression pattern analysis.The Pearson’s correlation analysis of specific PIN/PILS genes expression level and main ginsenoside contents were taken to reveal the potential relationship between auxin transports and ginsenoside biosynthesis in P.ginseng.Results:A genome-wide search of P.ginseng genome for homologous auxin transporter genes identified a total of 17 PIN and 11 PILS genes.Sequence alignment,putative motif organization,and sub-cellular localization indicated redundant and complementary biological functions of these PIN/PILS genes.Most PIN/PILS genes were differentially expressed in a tissue-specific manner,and showed significant correlations with ginsenoside content correspondingly.Eight auxin transporter genes,including both PIN and PILS subfamily members,were positively correlated with ginsenoside content(cor>0.60;P-value<0.05).The expression levels of eleven auxin transporter genes were increased dramatically in the early stage(0–0.5 DPI)after Cylindrocarpon destructans infection,accompanied with various overall expression patterns,implying the dynamic auxin transport in response to biotic stress.Conclusion:Based on the results,we speculate that the accumulation or depletion in temporal or spatial manner of auxin by PIN/PILS transporters involved in the regulation of HMGR activity and subsequent ginsenoside biosynthesis.展开更多
文摘[目的/意义]文章批判性研究了信息素养项目(Project Information Literacy,简称PIL)的主要研究成果与核心发现,旨在为中国的信息素养研究与实践提供参考。[方法/过程]作者通过历史分期、文献调查等方法,全面梳理了PIL主要研究成果和核心发现,指出其系统梳理了不同情境下大学生的信息行为,全面总结了大学生身份转变中的信息挑战,并且针对不同群体提出了促进大学生学习研究的建议。[结果/结论]PIL项目为信息素养理论与实践工作提供一定的经验借鉴:(1)紧跟时代发展,重视大学生信息素养的持续变化;(2)整合多方力量,构建大型研究项目的长效机制;(3)理论联系实践,重视信息素养研究的实际作用。
文摘基于自主设计的TTP/C(时间触发协议)总线控制器,提出了开放式DEEC(发动机数字式电子控制器)的冗余架构,将其划分为输入、核心计算及输出3种智能节点,并制定了各个智能节点的任务调度规划图.设计了基于DSP(digital signal processor)+FPGA(field-programmable gate array)的智能节点硬件平台,在此基础上完成各智能节点的软件设计.最后构建了开放式DEEC的PIL(process in the loop)仿真测试平台,以发动机模型为控制对象,展开了状态调节试验和总线故障注入试验.试验结果证明该开放式DEEC是可行的,并具有良好的重构特性.
基金supported by grants from the National Science and Technology Major Project (No.2018ZX09201-011,2017ZX09301060-012)the Fundamental Research Funds for the Central Public Welfare Research Institutes (ZXKT17027,ZXKT19027)+1 种基金the National Nature Science Foundation of China(81803672)the National Key Research and Development Program of China (2017YFC1702100)
文摘Objective:Plant hormones act as chemical messengers in the regulation of plant development and metabolism.The production of ginsenosides in Panax hybrid is promoted by auxins that are transported and accumulated by PIN-FORMED(PIN)and PIN-LIKES(PILS)auxin transporters.However,genome-wide studies of PIN/PILS of ginseng are still scarce.In current study,identification and transcriptional profiling of PIN/PILS gene families,as well as their potential relationship with ginsenoside biosynthesis in Panax ginseng were investigated.Methods:PIN/PILS genes in P.ginseng was identified via in silico genome-wide analysis,followed by phylogenetic relationships,gene structure,and protein profiles investigation.Moreover,previously reported RNA-sequence data from various tissues and roots after infection were utilized for PIN/PILS genes expression pattern analysis.The Pearson’s correlation analysis of specific PIN/PILS genes expression level and main ginsenoside contents were taken to reveal the potential relationship between auxin transports and ginsenoside biosynthesis in P.ginseng.Results:A genome-wide search of P.ginseng genome for homologous auxin transporter genes identified a total of 17 PIN and 11 PILS genes.Sequence alignment,putative motif organization,and sub-cellular localization indicated redundant and complementary biological functions of these PIN/PILS genes.Most PIN/PILS genes were differentially expressed in a tissue-specific manner,and showed significant correlations with ginsenoside content correspondingly.Eight auxin transporter genes,including both PIN and PILS subfamily members,were positively correlated with ginsenoside content(cor>0.60;P-value<0.05).The expression levels of eleven auxin transporter genes were increased dramatically in the early stage(0–0.5 DPI)after Cylindrocarpon destructans infection,accompanied with various overall expression patterns,implying the dynamic auxin transport in response to biotic stress.Conclusion:Based on the results,we speculate that the accumulation or depletion in temporal or spatial manner of auxin by PIN/PILS transporters involved in the regulation of HMGR activity and subsequent ginsenoside biosynthesis.
