检索结果-南通市图书馆

Devonian integrative stratigraphy and timescale of China

Science China Earth Sciences 2019年第1期62卷 112-134页

作者： Wenkun qie Xueping MA Honghe XU Li QIAO Kun LIANG Wen GUO Junjun SONG Bo CHEN Jianfeng LU CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences School of Earth and Space Sciences Peking University State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences

The Global Boundary Stratotype Sections and Points(GSSPs) for the bases of all seven international Devonian stages have been formally defined and ratified by IUGS till 1996, and nowadays, the main tasks for Devonian stratigraphers include further subdivision of these standard stages, strictly constrained absolute ages for the boundaries, and precise neritic-pelagic and marine-terrestrial correlations using multidisciplinary stratigraphy methods. Establishment of high-resolution Devonian integrative stratigraphy framework and timescale of China would play an important role in improving regional and international correlation, facilitating the recognition of important stratigraphic levels in different paleogeographic settings, and understanding the evolution pattern of biota, paleoclimate and paleoenvironment during this critical interval. Based on well-studied bio-and chronostratigraphy of Devonian in South China and adjacent areas, in combination with recent achievements in carbon isotope stratigraphy, event stratigraphy and radioactive isotope ages, this paper briefly summarize the research history and current status of Devonian chronostratigraphy of China, and for the first time introduce Devonian integrative stratigraphy framework of *** to date, few studies have been conducted on the astronomical cyclostratigraphy and high-resolution radioactive isotope dating in Devonian of China, which should be our main focuses in the near future.

关键词： Devonian Chronostratigraphy Biostratigraphy Carbon isotope stratigraphy Event stratigraphy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

钙钛矿含量对钒钛磁铁矿烧结性能的影响

引用

过程工程学报 2015年第1期15卷 62-67页

作者：刘然刘朝卿刘小杰郄亚娜吕庆河北联合大学冶金与能源学院河北省现代冶金技术重点实验室河北唐山063009 东北大学材料与冶金学院辽宁沈阳110819

通过烧结实验,并结合Fact Sage6.0热力学软件研究钒钛烧结矿中各液相和钙钛矿的生成情况与温度的关系.结果表明,钒钛烧结矿的转鼓指数为55.20%,低温还原粉化指数仅为25.92%.XRD和矿相结构分析表明,烧结矿冶金性能差的主要原因是钙钛矿... 详细信息

通过烧结实验,并结合Fact Sage6.0热力学软件研究钒钛烧结矿中各液相和钙钛矿的生成情况与温度的关系.结果表明,钒钛烧结矿的转鼓指数为55.20%,低温还原粉化指数仅为25.92%.XRD和矿相结构分析表明,烧结矿冶金性能差的主要原因是钙钛矿的存在破坏了液相黏结作用,骸晶状结构和树枝状钙钛矿明显增加,严重加剧裂纹的扩散,造成烧结矿质量明显下降.热力学计算得出,低温有利铁酸钙和硅酸钙等液相物质的生成,高温有利于钙钛矿的生成,当温度超过800℃时,钙钛矿含量基本保持稳定,铁酸钙和硅酸钙含量明显降低.

关键词：钒钛烧结矿还原钙钛矿显微结构冶金性能

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Middle Devonian ostracods from Jiwozhai patch reef(Dushan,Guizhou Province,South China):Biostratigraphic and palaeoecological implication

引用

Journal of Palaeogeography 2024年第3期13卷 581-593页

作者： Jun-Jun Song Jia-Yuan Huang Wen Guo Kun Liang Yu-Cong Sun Zhi-Hong Wang Wen-Kun qie State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina Hubei Key Laboratory of Paleontology and Geological Environment Evolution Wuhan Center of China Geological SurveyWuhan 430205Hubei ProvinceChina University of Chinese Academy of Sciences NanjingNanjing 211135Jiangsu ProvinceChina

The Middle Devonian ostracods from the Jiwozhai patch reef in Dushan, Guizhou Province, South China were described for the first time in this study. Twenty-nine species belonging to 20 genera were identified and figured, including a new species named Wangshangkia jiwozhaiensis sp. nov. The ostracod fauna in the Jiwozhai patch reef represents a Givetian age. The ostracod assemblage belongs to the smooth-podocopid association, which is also ecologically equivalent to the Eifelian Mega-Assemblage Ⅲ. This association is indicative of shallow open-marine environments. The Jiwozhai patch reef fauna is primarily comprised of suspension feeders, including filter-feeding ostracods, corals, brachiopods and bryozoans. Ostracods from the Jiwozhai patch reef were compared to the ostracod faunas from Laurentia-Baltica at generic level, which reveals limited faunal exchanges between South China and Laurentia-Baltica during the Middle Devonian.

关键词： Ostracods Givetian Jiwozhai patch reef Dushan Palaeoecology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Artificially triggered lightning and its characteristic discharge parameters in two severe thunderstorms

引用

Science China Earth Sciences 2007年第8期50卷 1241-1250页

作者： qie XiuShu ZHANG QiLin ZHOU YunJun FENG GuiLi ZHANG TingLong yaNG Jing KONG XiangZhen XIAO QingFu WU ShuJun Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

The lightning-induced-damages in the mid-latitude regions are usually caused during severe thunderstorms. But the discharge parameters of natural lightning are difficult to be measured. Five lightning flashes have been artificially triggered with the rocket-wire technique during the passage of two severe thunderstorms. The discharge current and close electric field of return stroke in artificially triggered lightning have been obtained in microsecond time resolution by using current measuring systems and electric field change sensors. The results show that the five triggered lightning flashes include 1 to 10 return strokes, and the average return stroke current is 11.9 kA with a maximum of 21.0 kA and a minimum of 6.6 kA, similar to the subsequent return strokes in natural lightning. The half peak width of the current waveform is 39 us, which is much larger than the usual result. The peak current of stroke I_p(kA) and the neutralized charge Q(C) has a relationship of I_p = 18.5Q^(0.65). The radiation field of return stroke is 5.9 kV ? m^(-1) and 0.39 kV ? m^(-1) at 60 m and 550 m, respectively. The radiation field decreases as r^(-1.119) with increase of horizontal distance r from the discharge channel. Based on the well-accepted transmission line model, the speed of return stroke is estimated to be about 1.4 × 10~8m·s^(-1), with a variation range of (1.1-1.6)×10~8m·s^(-1). Because of the similarities of the triggered lightning and natural lightning, the results in this article can be used in the protection design of natural lightning.

关键词： artificially triggered lightning characteristic discharge parameters current waveform electric field change in close distance severe thunderstorm

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An efficient recycling strategy to eliminate the residual“impurities”while heal the damaged structure of spent graphite anodes

引用

Green Energy & Environment 2024年第6期9卷 1027-1034页

作者： Dan yang Ying yang Haoran Du Yongsheng Ji Mingyuan Ma Yujun Pan Xiaoqun Qi Quan Sun Kaiyuan Shi Long qie Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai201804China State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Shuangdeng Group Co. Ltd.Taizhou225500China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou510275China

The recycling of graphite from spent lithium-ion batteries(LIBs)is overlooked due to its relatively low added value and the lack of efficient recovering *** reuse the spent graphite anodes,we need to eliminate their useless components(mainly the degraded solid electrolyte interphase,SEI)and reconstruct their damaged ***,a facile and efficient strategy is proposed to recycle the spent graphite on the basis of the careful investigation of the composition of the cycled graphite anodes and the rational design of the regeneration *** regenerated graphite,which is revitalized by calcination treatment and acid leaching,delivers superb rate performance and a high specific capacity of 370 mAh g^(-1)(~99% of its theoretical capacity)after 100 cycles at 0.1 C,superior to the commercial graphite *** improved electrochemical performance could be attributed to unchoked Li^(+) transport channels and enhanced charge transfer reaction due to the effective destruction of the degraded SEI and the full recovery of the damaged structure of the spent *** work clarifies that the electrochemical performance of the regenerated graphite could be deteriorated by even a trace amount of the residual“impurity”and provides a facile method for the efficient regeneration of graphite anodes.

关键词： Graphite Anode Regeneration Solid electrolyte interphase Spent lithium-ion battery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Long-term reconstruction of flash floods in the Qilian Mountains,China,based on dendrogeomorphic methods

引用

Journal of Mountain Science 2022年第11期19卷 3163-3177页

作者： qie Jia-zhi ZHANG Yong TRAPPMANN Daniel ZHONG Yi-hua BALLESTEROS-CÁNOVAS Juan Antonio FAVILLIER Adrien STOFFEL Markus Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Climate Change Impacts and Risks in the Anthropocene(C-CIA) Institute for Environmental SciencesUniversity of GenevaGeneva CH-1205Switzerland Dendrolab.ch Department of Earth SciencesUniversity of GenevaGeneva CH-1205Switzerland national Museum of natural Sciences MNCN-CSICC/Serrano 115bis28006MadridSpain Department F.-A.Forel for Environmental and Aquatic Sciences University of GenevaGeneva CH-1205Switzerland

In China,flash floods are one of the main natural disasters causing loss of life and damage to *** threat of flash floods is exacerbated with climate change and increased human activities,such that the number of disasters has shown a clear upward trend in recent ***,due to the scarcity of instrumental data or overly short timeseries,we are still lacking critical data to understand spatio-temporal patterns and driving factors of extreme flash *** missing knowledge is however crucial for a proper management of these hazards,especially in remote mountain *** forested catchments,dendrogeomorphology allows the reconstruction of past process activity based on growth disturbances(GDs)in trees that have been affected by past flash ***,in our study,for the first time,we reconstruct past flash floods in the Qilian Mountains,northeast Tibetan Plateau,over past *** this end,we sampled 99 Qinghai spruce(Picea crassifolia)trees affected by flash floods,with a total of 194increment cores,and identified 302 GDs induced by past flash *** GDs have been caused by at least 21 flash floods that we are able to reconstruct over the last 170 *** position of GDs within tree rings and the intra-seasonal dating of past events also allowed discussion of the likely synoptic situations that may have led to the triggering of flash floods in the *** regression analysis confirms that significant correlation exists between cumulative maximum 5-day August-September precipitation and reconstructed flash floods,which is corresponding to the majority of scars and related tangential rows of traumatic resin ducts(TRDs)found in the latewood portion of growth *** results support the idea that abundant precipitation occurring at the end of the summer season and early fall is the key factor driving flash floods in our study *** research not only fills the gaps regarding historical flash flood histories in

关键词： Tree ring Dendrogeomorphology Flash floods Qinghai spruce Qilian Mountains

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Development trends of environmental protection technologies for Chinese steel industry

引用

Journal of Iron and Steel Research International 2017年第3期24卷 235-242页

作者： Hai-feng Wang Chun-xia Zhang Jun-mao qie Ji-cheng Zhou yang Liu Xiu-ping Li Fang-qin Shangguan State Key Laboratory of Advanced Steel Processing and Products Central Iron and Steel Research Institute School of Ecological and Metallurgical Engineering University of Science and Technology Beijing

Chinese steel industry has made significant progress on reducing fresh water consumption and CO_2/SO_2/COD（ chemical oxygen demand） /dust emissions,and improving comprehensive utilization of solid waste. Some steel companies have become topped worldwide. However,due to the large output quantity of crude steel,the whole steel industry is still a huge source of pollutants. At present,environmental protection standards are encountering challenges of lack of technical support,taxation policy and other issues. Steel industry is currently facing enormous environmental pressure. The development trends of environmental protection technologies were studied by summarizing different development stages. To realize the development targets,the industry needs to carry out its research with independent intellectual property rights,develop comprehensive management systems and establish ecological chain with other industries. This can not only raise the level of environmental protection in a broader range,but also improve the energy efficiency of iron and steel plants and increase added value of waste utilization. Finally,23 environmental protection technologies were proposed and 4 new environmental protection practices were studied.

关键词： Environmental protection technology Chinese steel industry Development trend Ecological chain Environmental status Environmental protection practice

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quantitative Mitochondrial Proteomics Study on Protective Mechanism of Grape Seed Proanthocyanidin Extracts Against Ischemia/Reperfusion Heart Injury in Rat

引用

Chemical Research in Chinese Universities 2012年第6期28卷 1035-1040页

作者： LU Wei-da QIU Jie ZHAO Gai-xia qie Liang-yi WEI Xin-bing GAO Hai-qing Key Laboratory of Cardiovascular Proteomics of Shandong Province Department of Geriatrics Qilu Hospital of Shandong University Institute of Pharmacology School of Medicine Shandong University Jinan 250012 P. R. China

Cardiac ischemia/reperfusion（I/R） injury is a critical condition,often associated with high morbidity and *** cardioprotective effect of grape seed proanthocyanidin extracts（GSPE） against oxidant injury during I/R has been described in previous ***,the underlying molecular mechanisms have not been fully *** study investigated the effect of GSPE on reperfusion arrhythmias especially ventricular tachycardia（VT） and ventricular fibrillation（VF）,the lactic acid accumulation and the ultrastructure of ischemic cardiomyocytes as well as the global changes of mitochondria proteins in in vivo rat heart model against I/R *** significantly reduced the incidence of VF and VT,lessened the lactic acid accumulation and attenuated the ultrastructure *** differential proteins related to cardiac protection were revealed by isobaric tag for relative and absolute quantitation（iTRAQ） *** proteins were mainly involved in energy ***,monoamine oxidase A（MAOA） was also *** differential expression of several proteins was validated by Western *** study offered important information on the mechanism of GSPE treatment in ischemic heart disease.

关键词： Grape seed proanthocyanidin extracts(GSPE) Ischemia-reperfusion heart injury In vivo rat model Mitochondria proteomics Energy metabolism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Investigation and Configuration Analysis of Aquatic Plants in Chengdu Wetland Parks

引用

Journal of Landscape Research 2021年第2期13卷 47-49页

作者： qie yawei Guang’an Vocational&Technical College Guang’anSichuan 638000China

To find out the current situation and configuration of aquatic plants in landscape water of Chengdu wetland parks,sample-plot survey of aquatic plants in landscape water in the built wetland parks of Chengdu and urban parks was *** results showed that there are 41 kinds of aquatic plants in the research region,belonging to 23 *** are mainly hygrophyte and emergent plants,while floating and submerged plants are rarely *** of aquatic plants is mainly composed of emergent plants,supplemented by floating-leaved and submerged plants,and water landscape is ***,configuration of aquatic plants in wetland parks was analyzed from the ecological function,landscape construction and other aspects,to provide the reference for plant configuration of urban wetland parks.

关键词： Wetland parks Aquatic plants Landscape evaluation Configuration

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Colored-leaf Species Resources and Their Landscaping Application in Guang'an City

引用

Journal of Landscape Research 2015年第6期7卷 97-98页

作者： qie yawei Guang'an Vocational and Technical College

By investigating species, characteristics and landscaping application of colored-leaf species in Guang'an City, this paper proposed suggestions for the application of colored-leaf species in the local area.

关键词： Guang’an City Colored-leaf species Landscaping application

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：