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Since the discovery of Helicobacter pylori(H.pylori)infection as the major cause of gastroduodenal disorders three decad......
Due to the property of water repellence, biomimetic superhydrophobic surfaces have been widely applied to green technolo......
LaFeO3 perovskite supported Ni and Ni-Fe catalysts were prepared and applied to methanation reaction of syngas.Two prepa......
In this paper, a plug-in hybrid electrical vehicle(PHEV) is taken as the research object, and its dynamic performance an......
OBJECTIVE: To analyze the correlation between acne and Northwest dryness syndrome in the Xinjiang region to provide an e......
Two new and convenient methods using triphenyl phosphite or sodium dithionite todeoxygenate triphenylarsine oxide to tr......
THE TORUS OCCIPITALIS AND RELATED STUCTURES AND THEIR TRANSFORMATIONS IN THE COURSE OF HUMAN EVOLUTI
In studying the dentition of Sinanthropus pekinensis (1937) Iarrived at the conclusion that the transformation of the p......
Cambro-Ordovician rocks occur widely in Hsishan. In the westernenvirons of Peking some of the best exposures of these r......
Geochemical and mineralogical studies have shown that N is a ubiquitous component in igneous, metamorphic, and especial......
By careful sampling and accurate analysis of recent sediments, the time series of sediment grain sizes and δ18O, δ13C......
The Yuanmou Basin of Yunnan Province is ahotspot for the research of early hominid evolution and its environmental backg......
Land use and land coverchangeshave a greatimpacton the regionalhydrologicalprocess. Based on three periods ofremote sens......
Graphene,a rapidly rising star on the horizon of material science,has a unique two-dimensional nanostructure as well as ......
1.Introduction Most metallic mineral deposits formed from hydrothermal fluids,and the mineralization processes include b......
SYNTHESIS AND CRYSTAL STRUCTURE OF A NEW BINUCLEAR CUPRUM COMPLEX, [(CuCl)_2(η~2-dppe)_2(μ-dppe)]·2C
C80H76Cl6Cu2P6,Mr=1563.13,monoclinic,P21/n,a=12.608(9),b=21.729(7),c=14.473(8)A.,β=105.34(5)°,V=3823.6A3,Z=2,Dc=1.28 ......
Based on the fact that the first set of the linear relationship between z and lg/ ofstoichiometric displacement model fo......
Redox and spectroscopic properties of the eight-coordination complexes of molybdenum and the rare-earth elements Eu or ......
The reaction mechanisms of HNCS with NH(X3Σ) were theoretically investigated. The minimum energy paths(MEP) of the reac......
In this paper,we present a relation matrix description of temporal relations.Based on this modela new algorithm for lab......
Objective:Analysis of the results of 37 million cases by using cervical liquid-based cytology screening,discus-sion the ......
Bis[1-hydroxyalkylbenzo]-21-crown-7 (A-C) have been synthesized by ) two-step reactions from dibenzo-21-crown-7 (DB21C7)......
The present paper reports on comparative studies of R-phycoerythrin (R-PE) from 30 species of the red seaweeds in Bangi......
Extracellular adenosine induces apoptosis in a variety of cancer cells via intrinsic and extrinsic pathways. In the form......
Adsorption Kinetics of Pb~(2+) and Cu~(2+) on Variable Charge Soils and Minerals: Ⅲ. Adsorption Kine
The adsorption kinetics of Pb2+ on different soils and minerals with variable charges was studied by the two ion-select......
A new scheme is presented to design a rotated Barnes-Wall lattice based vector quantizer(LVQ). The construction method o......
Microstructures and mechanical properties of nanocrystalline NiTi intermetallics formed by mechanosy
nanocrystalline NiTi 形状记忆合金的明确的表达在机械刺激和医药 implantology 有潜在的效果。现在的工作阐明为 NiTi 的结构的......
大规模多孔材料格点模型系统的计算机模拟的运行效率通常严重受制于初始构型的体积大小。为了提高多孔材料格点模型建模的效率，一种......
采用格子Boltzmann方法对低雷诺数下气体绕流圆柱的规律进行了研究。对比计算了双圆柱在不同圆心距、不同Re数、不同来流速度与双......
本文讨论了利用变温X射线衍射方法在液氮至室温温区上研究了Bi1.6Pb0.4Sr2Ca2Cu3-xFexOy (x=0,0.08) 铋系高温超导相晶格振动的动......
采用单温模型,利用有限元方法对硅在纳秒脉冲激光作用下的温度积累效应进行了数值模拟。给出了单脉冲、多脉冲作用下,硅表面附近的......
用格子Boltzmann方法研究了方腔内二维多孔介质由于不均匀温度分布产生的浮力效应而引起的自然对流传热问题.通过数值模拟得到了多......
本文对具非Lipschitz系数的随机微分方程给出解的存在唯一性与非爆炸性的新判别条件，少许改进了文[4]的有关结果。通过控制交互作用......
修正了Callaway J计算Wigner固体的平均势理论中出现的错误。以单原子的bcc和fcc结构的金属为例，建立了计算Wigner固体的平均势的理......
制备了不同组分Na、 W、 Mn/SiO2催化剂, 在ITD(Ion Trap Detector)装置上进行了催化剂表面CO恒温脉冲反应(CO-CTPR). 研究结果表......
种分氢氧化铝中碱含量变化规律关系到氢氧化铝的质量和碱耗，通过测定溶液浓度和电导率、氢氧化铝中碱含量和粒度分布以及分析粒子形......
基于格的属性密码体制具有许多优良特性,可迄今人们尚未提出基于格的属性签名方案。为此,首先构造了一个基于格的属性签名方案,其......
利用X射线衍射技术和电子显微镜能谱分析方法研究测定了化合物Fe2＋xTi1-xSny的晶体结构和点阵参数，并利用点阵参数法结合电子显微镜......
为了研究合金化对Nb相结构和渗氢性能的影响,以Nb-14Mo和Nb-7Mo-7Co合金为研究对象,采用精细X射线衍射（XRD）分析、吸放氢压强—成分......
为了研究多孔材料内气体脱附、扩散规律,结合实际多孔材料的结构特征,利用分形布朗运动模型（FBM）构造出由宏观孔隙和固相基质组成的......
采用单相格子Boltzmann模型进行了物体垂直入水问题的研究。该模型适用于大密度比的气液两相流动,其特点是忽略了系统中气相对液相......
以钛铁矿和石墨为原料,在N2气氛下通过碳热还原法制备了粒度均匀的微米Ti（C,N）粉。结合X射线衍射分析,主要研究了Ti（C,N）粉制备过程中......
通过分析球磨试样和球磨后退火试样的Ｘ射线衍射谱，研究了Ｔｉ，Ａｌ混合粉末机械合金化过程中六方相α－Ｔｉ和Ｔｉ３Ａｌ的晶格畸变特点。结果表明，六方相畸变特......
子波图像的各子带间通常存在着很强的能量相关性,而有限状态量化模型可以用来很好地描述自然图像子波域内不同标度间的自相似性.向......
借助光学显微镜、差示量热扫描仪、扫描电镜，以及硬度、拉伸性能测试方法，分析了zn元素对Al-Cu-Mg-Ag合金组织和常温力学性能的影响．......
主要介绍在现浇整体钢筋结构中“后浇带”的装置、保护、施工等内容,使“后浇带”施工满足设计及结构安全的要求......
argues that structural unemployment is not a new phenomenon.The author challenges the view of the Western economists who......
