Intangible cultural heritage has a rich connotation of unique thinking way, ethical imaginationand cultural awareness, which is an important sign of national spiritual culture. Possessing the specialvalues of professi...Intangible cultural heritage has a rich connotation of unique thinking way, ethical imaginationand cultural awareness, which is an important sign of national spiritual culture. Possessing the specialvalues of professionalism, permanency, security and openness, with the advantages museums play acentral role in inheriting and rescuing our intangible cultural heritage. Museums have a lot of technicalmeans for museums to protect and inherit intangible cultural heritage, such as scientific research,preservation of material carrier, museum publications, displays on intangible cultural heritage, estab-lishing thematic museums. In intangible cultural heritage, agricultural heritage is the most importantpart. The core content of which is the ideas and methods of harmony between mankind and environ-ment. There is a variety of practices on the protection by China National Agricultural Museum.展开更多
为揭示我国木薯(Manihot esculenta)主要病虫害研究的发展态势,本研究通过中国知网(CNKI)和Web Of Science(WOS)进行数据检索,运用文献计量方法,从文献产出趋势、研究力量布局、研究主题分布及演化阶段等方面进行分析。结果显示:(1)发...为揭示我国木薯(Manihot esculenta)主要病虫害研究的发展态势,本研究通过中国知网(CNKI)和Web Of Science(WOS)进行数据检索,运用文献计量方法,从文献产出趋势、研究力量布局、研究主题分布及演化阶段等方面进行分析。结果显示:(1)发文量总体呈上升趋势,历经了初始期(1981—2002年)、发展期(2003—2016年)和快速发展期(2017年至今)3个阶段。(2)发文单位以中国热带农业科学院和海南大学等机构为主,载文量最多的中文刊物为《热带作物学报》,载文量最多的外文刊物为Frontiers in Plant Science。(3)关键词共现分析表明,我国木薯病虫害研究主要聚焦木薯虫(螨)害的发生及防治研究、木薯花叶病发生及防治研究、木薯细菌性枯萎病发生及防治研究、木薯病虫害抗性机制研究4个方向;以研究对象划分,“二斑叶螨”“木瓜秀粉蚧”“木薯普通花叶病毒”为近年来的热点关键词;以研究内容划分,“基因表达”“蛋白质互作”“转录因子”等为近年来的热点关键词。(4)战略坐标分析显示,木薯细菌性枯萎病发生及防治研究居木薯病虫害领域的核心地位;木薯抗病虫基因网络和分子机制解析成为近年来该领域研究的热点。本研究一方面为关注木薯病虫害研究相关机构和学者提供数据支持和研究见解;另一方面为开展领域文献计量标准化分析提供思路借鉴。展开更多
In order to extend the statistical energy analysis(SEA) method to predict the vibration and sound radiation of underwater structures,we mainly analyze the effect of water loading on the key parameters in SEA and propo...In order to extend the statistical energy analysis(SEA) method to predict the vibration and sound radiation of underwater structures,we mainly analyze the effect of water loading on the key parameters in SEA and propose the approximate expressions of modal density and mean square velocity of submerged plates.With the radiation efficiency of submerged plates previously proposed by us,the modified SEA solutions of the radiated sound power and mean square velocity of submerged stiffened rectangular plates are established.Numerical examples show that the modified SEA solutions are more close to the theoretical solutions than the present SEA solutions,and reflect the mean value or trend of the theoretical solution much better,especially at lower frequencies.An experiment of point-exciting submerged plates was done in a lake.The experiment values show that for both un-stiffened and stiffened plates,the modified SEA solutions have a good agreement while the present SEA solution has considerable error,which validates the established statistical model.展开更多
文摘Intangible cultural heritage has a rich connotation of unique thinking way, ethical imaginationand cultural awareness, which is an important sign of national spiritual culture. Possessing the specialvalues of professionalism, permanency, security and openness, with the advantages museums play acentral role in inheriting and rescuing our intangible cultural heritage. Museums have a lot of technicalmeans for museums to protect and inherit intangible cultural heritage, such as scientific research,preservation of material carrier, museum publications, displays on intangible cultural heritage, estab-lishing thematic museums. In intangible cultural heritage, agricultural heritage is the most importantpart. The core content of which is the ideas and methods of harmony between mankind and environ-ment. There is a variety of practices on the protection by China National Agricultural Museum.
文摘为揭示我国木薯(Manihot esculenta)主要病虫害研究的发展态势,本研究通过中国知网(CNKI)和Web Of Science(WOS)进行数据检索,运用文献计量方法,从文献产出趋势、研究力量布局、研究主题分布及演化阶段等方面进行分析。结果显示:(1)发文量总体呈上升趋势,历经了初始期(1981—2002年)、发展期(2003—2016年)和快速发展期(2017年至今)3个阶段。(2)发文单位以中国热带农业科学院和海南大学等机构为主,载文量最多的中文刊物为《热带作物学报》,载文量最多的外文刊物为Frontiers in Plant Science。(3)关键词共现分析表明,我国木薯病虫害研究主要聚焦木薯虫(螨)害的发生及防治研究、木薯花叶病发生及防治研究、木薯细菌性枯萎病发生及防治研究、木薯病虫害抗性机制研究4个方向;以研究对象划分,“二斑叶螨”“木瓜秀粉蚧”“木薯普通花叶病毒”为近年来的热点关键词;以研究内容划分,“基因表达”“蛋白质互作”“转录因子”等为近年来的热点关键词。(4)战略坐标分析显示,木薯细菌性枯萎病发生及防治研究居木薯病虫害领域的核心地位;木薯抗病虫基因网络和分子机制解析成为近年来该领域研究的热点。本研究一方面为关注木薯病虫害研究相关机构和学者提供数据支持和研究见解;另一方面为开展领域文献计量标准化分析提供思路借鉴。
文摘In order to extend the statistical energy analysis(SEA) method to predict the vibration and sound radiation of underwater structures,we mainly analyze the effect of water loading on the key parameters in SEA and propose the approximate expressions of modal density and mean square velocity of submerged plates.With the radiation efficiency of submerged plates previously proposed by us,the modified SEA solutions of the radiated sound power and mean square velocity of submerged stiffened rectangular plates are established.Numerical examples show that the modified SEA solutions are more close to the theoretical solutions than the present SEA solutions,and reflect the mean value or trend of the theoretical solution much better,especially at lower frequencies.An experiment of point-exciting submerged plates was done in a lake.The experiment values show that for both un-stiffened and stiffened plates,the modified SEA solutions have a good agreement while the present SEA solution has considerable error,which validates the established statistical model.
