为研究地质学领域的大数据和人工智能研究现状、热点和前沿,在中国知网(CNKI)核心期刊和Web of Science(WoS)核心数据库收集了2000—2022年相关中文文献3600篇、英文文献1803篇,利用社区结构分析软件CiteSpace,从合作作者、研究国家、...为研究地质学领域的大数据和人工智能研究现状、热点和前沿,在中国知网(CNKI)核心期刊和Web of Science(WoS)核心数据库收集了2000—2022年相关中文文献3600篇、英文文献1803篇,利用社区结构分析软件CiteSpace,从合作作者、研究国家、研究机构、关键词聚类、关键词时空分布图谱等进行可视化分析,并统计了2021—2022年间,地质学领域国际顶级期刊(综合影响因子10以上)的文献进行前沿分析。分析结果表明,近10年内该研究领域全球累计发文量激增,以中国为代表的亚洲国家和以美国为代表的欧美国家研究为主,双方累计发文量相差不大,论文中介中心性欧美国家普遍较高。我国研究机构之间的交流合作居多,与国外的研究机构交流合作较少,国外研究机构则与之相反。该领域以应用机器学习类方法、知识图谱构建等,在地质灾害防治、地震解释、石油与天然气勘查、固体矿产资源预测等方向进行的科学研究为研究热点,以深度学习、集成学习、智能平台搭建等为手段的地球演化过程中的重大地质事件研究、全球性气候变化、极地及海洋地质研究、数字地质建模及定量分析、地震预报、地灾易发性精准评估等为研究前沿。展开更多
The porphyrin derivatives, 5,10,15,20-tetra(4-(N-pentane-carboxamide) phenyl) porphyrin(4 NC5-TPP), 5,10,15,20-tetra(4-(N-dodecane-carboxamide) phenyl) porphyrin(4 NC12-TPP) and their zinc-complexes(4 NC5...The porphyrin derivatives, 5,10,15,20-tetra(4-(N-pentane-carboxamide) phenyl) porphyrin(4 NC5-TPP), 5,10,15,20-tetra(4-(N-dodecane-carboxamide) phenyl) porphyrin(4 NC12-TPP) and their zinc-complexes(4 NC5-TPPZn and 4 NC12-TPPZn), have been synthesized. Their thermal properties and morphologies were investigated via thermal gravity analysis(TGA), differential scanning calorimetry(DSC) and polarized optical microscopy(POM). It was found that the 4 NC5-TPP was amorphous and the 4 NC5-TPPZn was crystalline at room temperature, while the 4 NC12-TPP formed the columnar liquid crystal and the 4 NC12-TPPZn showed the spherulite texture. The electron state density distributions and the optimum configuration of the porphyrin derivatives were calculated by chemical simulation. The electrochemical oxidation and reduction abilities of the porphyrin derivatives were studied by cyclic voltammetry(CV). It was indicated that the porphyrin derivatives had the potential to develop organic photovoltaic(OPV) devices. Using the porphyrin derivatives as donor materials and the 3,4,9,10-perylenetetracarboxylic dianhydride(PTCDA) as the acceptor material, the OPV devices were fabricated. The device structure is ITO/porphyrin derivatives:PTCDA/Al. The relationship between the morphology and performance of OPV was studied. It was found that the crystalline morphology of the film was beneficial to improve the efficiency of the devices.展开更多
文摘为研究地质学领域的大数据和人工智能研究现状、热点和前沿,在中国知网(CNKI)核心期刊和Web of Science(WoS)核心数据库收集了2000—2022年相关中文文献3600篇、英文文献1803篇,利用社区结构分析软件CiteSpace,从合作作者、研究国家、研究机构、关键词聚类、关键词时空分布图谱等进行可视化分析,并统计了2021—2022年间,地质学领域国际顶级期刊(综合影响因子10以上)的文献进行前沿分析。分析结果表明,近10年内该研究领域全球累计发文量激增,以中国为代表的亚洲国家和以美国为代表的欧美国家研究为主,双方累计发文量相差不大,论文中介中心性欧美国家普遍较高。我国研究机构之间的交流合作居多,与国外的研究机构交流合作较少,国外研究机构则与之相反。该领域以应用机器学习类方法、知识图谱构建等,在地质灾害防治、地震解释、石油与天然气勘查、固体矿产资源预测等方向进行的科学研究为研究热点,以深度学习、集成学习、智能平台搭建等为手段的地球演化过程中的重大地质事件研究、全球性气候变化、极地及海洋地质研究、数字地质建模及定量分析、地震预报、地灾易发性精准评估等为研究前沿。
基金Funded by the National Natural Science Foundation of China(Nos.20674022,20774031,21074039)the Natural Science Foundation of Guangdong(Nos.2006A10702003,2009B090300025,2010A090100001,2014A030313241,2014B090901068,2016A010103003)+1 种基金the Science and Technology Program of Guangdong and GuangzhouThe Ministry of Education of the People’s Republic of China(No.20090172110011)
文摘The porphyrin derivatives, 5,10,15,20-tetra(4-(N-pentane-carboxamide) phenyl) porphyrin(4 NC5-TPP), 5,10,15,20-tetra(4-(N-dodecane-carboxamide) phenyl) porphyrin(4 NC12-TPP) and their zinc-complexes(4 NC5-TPPZn and 4 NC12-TPPZn), have been synthesized. Their thermal properties and morphologies were investigated via thermal gravity analysis(TGA), differential scanning calorimetry(DSC) and polarized optical microscopy(POM). It was found that the 4 NC5-TPP was amorphous and the 4 NC5-TPPZn was crystalline at room temperature, while the 4 NC12-TPP formed the columnar liquid crystal and the 4 NC12-TPPZn showed the spherulite texture. The electron state density distributions and the optimum configuration of the porphyrin derivatives were calculated by chemical simulation. The electrochemical oxidation and reduction abilities of the porphyrin derivatives were studied by cyclic voltammetry(CV). It was indicated that the porphyrin derivatives had the potential to develop organic photovoltaic(OPV) devices. Using the porphyrin derivatives as donor materials and the 3,4,9,10-perylenetetracarboxylic dianhydride(PTCDA) as the acceptor material, the OPV devices were fabricated. The device structure is ITO/porphyrin derivatives:PTCDA/Al. The relationship between the morphology and performance of OPV was studied. It was found that the crystalline morphology of the film was beneficial to improve the efficiency of the devices.