检索结果-南通市图书馆

^(40)Ar/^(39)Ar geochronology of the Faku tectonites:Implications for the tectonothermal evolution of the Faku block,northern Liaoning

引用

Science China Earth Sciences 2005年第5期48卷 601-612页

作者： zhang Xiaohui wang hui LI Tiesheng Key Laboratory of Lithosphere Tectonic Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Key Laboratory of Lithosphere Tectonic Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Key Laboratory of Lithosphere Tectonic Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

For lack of reliable isotopic chronological data, the metamorphic rock series in the Faku region of northern Liaoning has long been regarded as the platform basement. Recent studies reveal that these deformed and metamorphosed rocks, with a variety of protoliths of plutonic intrusions and supracrustal volcanic and sedimentary rocks, were genetically related to later ductile shearing events, and they, together with the syntectonic intrusions, constituted the large-scale Faku tectonites. In this paper, we report new 40Ar/39Ar data on hornblende, biotite, and K-feldspar from typical granitic mylonites in this suite of tectonites. The plateau age 256 Ma of FK53 hornblende and the high-temperature plateau age 262 Ma of Fk51-1 biotite should rep- resent the cooling ages when the granites, formed as a result of Paleozoic oceanic crustal sub- duction beneath the continental crust or collision of multiple micro-continental blocks, were ex- humed into shallow crustal levels. The plateau age 231 Ma of FK51-1 boitite and the apparent age 227 Ma of Fk51-2 K-feldspar are interpreted to record the time of ductile deformation occur- ring under greenschist facies conditions, i.e. the formation age of the Faku tectonites, while the age gradient from 197 Ma to 220 Ma of Fk51-2 K-feldspar probably record the subsequent stable uplift-cooling process. The tectonic exhumation event indicated by the plateau age 180 Ma of Fk51-2 K-feldspar may be associated with the onset of paleo-Pacific subduction beneath the North China plate. In addition, the U-Pb dating of FK54 zircon from later-intruded granite yields the age of crystallization of this super-unit intrusion at 159 Ma, thus establishing an upper limit for the formation age of the Faku tectonites, while the plateau age 125 Ma of Fk54 K-feldspar most likely corresponds to the rapid cooling and tectonic denudation event associated with the final collision between the Siberian plate and the North China plate. These isotopic ages provide im-

关键词： northern Liaoning, tectonite, 40Ar/39Ar age, zircon U-Pb age, Faku Faulted Convex.

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

Research on Auto-detection for Remainder Particles of Aerospace Relay Based on Wavelet Analysis

引用

Chinese Journal of Aeronautics 2007年第1期20卷 75-80页

作者： GAO Hong-liang zhang hui wang Shu-juan Department of Electrical Engineering Harbin Institute of Technology Harbin 150001 China

Aerospace relay is one kind of electronic components which is used widely in national defense system and aerospace system. The existence of remainder particles induces the reliability declining, which has become a severe problem in the development of aerospace relay. Traditional particle impact noise detection （PIND） method for remainder detection is ineffective for small particles, due to its low precision and involvement of subjective factors. An auto-detection method for PIND output signals is proposed in this paper, which is based on direct wavelet de-noising （DWD）, cross-correlation analysis （CCA） and homo-filtering （HF）, the method enhances the affectivity of PIND test about the small particles. In the end, some practical PIND output signals are analysed, and the validity of this new method is proved.

关键词： aerospace relay remainder particles PIND wavelet analysis

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

Selectively Fluorescent Sensing Behavior of Phenylaza-15-crown-5-triazolyl Coumarin for Hg2＋ and Fe3＋ in Alcohol and Aqueous Media Respectively

引用

Chinese Journal of Chemistry 2013年第5期31卷 598-602页

作者： Zhijun zhang hui wang Hengyi zhang Yu Liu Department of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China

A n-conjugated phenylaza-15-crown-5-triazol-substituted coumarin fluoroionophore 1 was synthesized by cop- per（I）-catalyzed huisgen alkyne-azide 1,3-dipolar cycloaddition （CuAAC ＂click＂ reaction）. 1 can display selective fluorescence enhancement toward Fe3＋ over Hg2＋, Cr3＋ and the other metal ions in aqueous solution. In sharp con- trast, the fluorescence behavior between Fe3＋ and Hg2＋ is completely reversed in EtOH. That is, Hg2＋ gives the largest fluorescence enhancement over Cr3＋, Fe3＋ and the other metal ions.

关键词： coumarin sensors crown compounds metal ions fluorescence

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

Fluidization of non-spherical particles:Sphericity,Zingg factor and other fluidization parameters

引用

Particuology 2008年第2期6卷 125-129页

作者： Baiqian Liu Xiaohui zhang Ligang wang hui Hong School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China

A comparison of sphericity and Zingg factor for particle morphology and description of fluidized-bed dynamics are presented. It is found that Zingg factor Fz = LH/B2 （where L, H and B are, respectively, the length, breadth and height of a particle） well describes the effect of particle morphology. Experimental results show that non-spherical particles give poor fluidizing quality as compared to spherical particles in terms of pressure drop, Umf, etc. With the same volume-equivalent diameter, non-spherical particles have lower Umf and fluidizing coefficient 8. Some smooth curves have been obtained between the parameters 8, Umf and Fz. The quality of fluidization could be evaluated by fluidizing coefficient, which has been correlated to the Zingg factor and minimum fluidizing velocity in this paper.

关键词： Particle morphology Fluidized-bed Sphericity Non-spherical particle

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

Novel titanium particles reinforced Zr-based bulk metallic glass composites prepared by infiltration casting

引用

Journal of University of Science and Technology Beijing 2008年第4期15卷 505-508页

作者： Cuimei zhang Xidong hui Meiling wang Guoliang Chen State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

A novel Ti/Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 composite was successfully prepared by infiltrating the melt into sintered Ti preform. It shows that the introduction of Ti particles into the composite results in an increase in elastic strain to 3% and an enhancement of the strength up to 2.1 GPa. High specific strength has been obtained because of the decrease in density of the composite. It is suggested that an improvement in the mechanical properties of the composite may be attributed to the generation of multiple shear bands and some deformation in the Ti particles.

关键词： melt infiltration bulk metallic-glass Ti particles mechanical properties

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

A highly selective and sensitive fluorescent chemosensor for Zn^(2+)

引用

Chinese Chemical Letters 2008年第10期19卷 1240-1243页

作者： Xiu Ying zhang Zuo hui wang Lin Yang School of Chemistry and Environmental Science Key Ltlboratory for Environmental Pallution Control Technology of Henan Province Henan Normal University Xinxiang 453007 China

A new selective Zn^2＋ fluorescent chemosensor, o-vanillin-4-ethoxybenzoylhydrazone （1）, was designed and prepared. Free 1 mainly displayed very weak fluorescence at 480 nm upon excitation at 403 nm. It displayed high selectivity for Zn^2＋ and had a 518- fold fluorescent enhancement upon binding of Zn^2＋, while the other cation ions had only little influence on the fluorescence of 1. Mechanism of enhancement of l＇s fluorescence by Zn^2＋ was briefly discussed.

关键词： Chemosensor Zinc ion Fluorescence enhancement N-Acylhydrazone

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

Tough Poly(L-DOPA)-containing Double Network Hydrogel Beads with High Capacity of Dye Adsorption

引用

Chinese Journal of Polymer Science 2018年第11期36卷 1251-1261页

作者： Pei-Bin zhang An-Qi Tang zhang-hui wang Jing-Yu Lu Bao-Ku Zhu Li-Ping Zhu Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University

Developing a low-cost and well-recyclable adsorbent with high adsorption capacity is greatly desirable in dye wastewater treatment. Here, we demonstrate a kind of novel tough and reusable hydrogel beads with quite high capacity of dye adsorption via incorporating mussel-bioinspired poly（L-DOPA）（PDOPA） into alginate/poly（acrylamide） double network （DN） hydrogels. The synthesized PDOPA nanoaggregates were introduced into the DN hydrogels by simple one-pot mixing with the monomers prior to polymerization. The fabricated hydrogel beads exhibited high mechanical strength and good elastic recovery due to the interpenetrating Ca2＋-alginate and poly（acrylamide） networks. It was shown that the beads exhibited relatively high dye adsorption capacity compared to other adsorbents reported in literature, and the introduction of PDOPA with an appropriate amount raised the adsorption capacity. It is believed that the addition of PDOPA and the matrix of double network architecture contributed synergistically to the high adsorption capacity of hydrogel beads. Moreover, the desorption of dyes could be easily realized via rinsing in acidic water and ethanol solution. The hydrogel beads remained the high adsorption capacity even after 5 times of adsorption and desorption cycles. This tough and stable hydrogel with high adsorption capacity may have potential in treatment of dye wastewater released by textile dyeing industry.

关键词： Dye adsorption Hydrogel beads Poly(L-DOPA) Double network High strength

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

Vibration Effects on the Structural Stability of Al-Ti Intermetallics by First-principles Calculations

引用

Journal of Materials Science & Technology 2010年第12期26卷 1071-1077页

作者： hui zhang and Shaoqing wang Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [a] Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The structural stability of the intermetallics AlTi3, Al2Ti, Al3Ti4 and Al3Ti in the Al-Ti system has been investigated using density functional theory （DFT） and density functional perturbation theory （DFPT）. The calculated ground-state convex hull is in agreement with the experimental researches. Al3Ti4 （hP7） is metastable at 0 K and may be stabilized as the temperature increases due to the effects of the vibration entropy. For Al2Ti, r-Al2Ti is stable at 0 K and h-Al2Ti is stabilized by the vibration entropy at high temperatures. Al3Ti （tI16） is unstable considering vibration effects and Al3Ti （tI8） is the most stable structure at 0 K.

关键词： First-principles Al-Ti Vibration Crystal structure

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

Research on the influence of action between fin and anti-rolling tank on the integrated stabilization effect

引用

Journal of Marine Science and Application 2007年第1期6卷 9-14页

作者： YU Li-jun JIN Hong-zhang wang hui YANG Sheng College of Automation Harbin Engineering University Harbin 150001 China

Through analyzing the roll model of the integrated system of fin and anti-rolling tank, this paper uses binomial equation to simplify the module and check how the approximate parameters simulate the original function. Based on the simplified module, the influence of fin and anti-rolling tank on the coefficient items of the roll module is discussed, and the influencing factors between fin and anti-rolling tank are analysed. And through simulation, the influence of action between fin and anti-rolling tank on the static characteristics, and the integrated stabilization effect, are analyzed.

关键词： fin stabilizer anti-rolling tank integrated stabilization action each other influence

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

Effects of wind-dispelling drugs and deficiency-nourishing drugs of Houshiheisan compound prescription on astrocyte activation and inflammatory factor expression in the corpus striatum of cerebral ischemia rats

引用

Neural Regeneration Research 2012年第24期7卷 1851-1857页

作者： Qiuxia zhang hui Zhao Lei wang Qi zhang Haizheng wang College of Traditional Chinese Medicine Capital Medical UniversityBeijing 100069China

This study explored protective effects of Houshiheisan and its compound prescription of wind-dispelling drugs and deficiency-nourishing drugs on cerebral ischemia in terms of astrocyte activation and inflammatory factor *** suggested that Houshiheisan lessened neuronal degeneration in the corpus striatum on the ischemic side of rats following cerebral ischemia/reperfusion injury,contributed to astrocyte activation and glial fibrillary acidic protein expression in the corpus striatum and decreased the levels of interleukin-2,interleukin-6, interleukin-1βand tumor necrosis factor-α.Factor analysis results demonstrated that deficiency-nourishing drugs were more beneficial in protecting neurons and upregulating glial fibrillary acidic protein expression than wind-dispelling ***,wind-dispelling drugs were more effective in increasing the number of glial fibrillary acidic protein-positive cells and reducing inflammatory factor expression than deficiency-nourishing *** indicate that different ingredients of Houshiheisan suppress cerebral ischemic injury by promoting astrocyte activation and diminishing inflammatory factor expression.

关键词： Houshiheisan glial fibrillary acidic protein corpus striatum interleukin tumor necrosis factor-α cerebral ischemia neuronal protection neural regeneration

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

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：