中国期刊数据库驰名网址

1.《中国数字期刊群CHINAINFO(万方数据WANFANG DATA)》http://www.periodicals.net.cn http://www.wanfangdata.com.cn2.《中国期刊网(中国知网CNKI)》http://www.cnki.net.cn http://www.chinajournal.net.cn3.《中国科学引文数据库CSCD》http://www.sciencechina.ac.cn     

Some Similarity Reduction Solutions to Two-Dimensional Incompressible Navier-Stokes Equation

We investigate the symmetry reduction for the two-dimensional incompressible Navier Stokes equation in conventional stream function form through Lie symmetry method and construct some similarity reduction solutions. Two special cases in [D.K. Ludlow, P.A. Clarkson, and A.P. Bassom, Stud. Appl. Math. 103 （1999） 183] and a theorem in [S.Y. Lou, M. Jia, X.Y. Tang, and F. Huang, Phys. Rev. E 75 （2007） 056318] are retrieved.     

元素核合成

简单介绍了元素的核合成理论发展的历史和现况．The development history of the nucleosynthesis theory of elements, which was presented by E. M. Burbidge. G. R. Burbidge, W. A. Fowler, F. Hoyle and A. G. W.Cameron, and the progress of this theory during the past 40 years are introduced.     

Analytic subject index to 2010

43.05. History; 43.10. General; 43.15. Standards; 43.20. General linear acoustics; 43.25. Nonlinear acoustics; 43.28. Aeroacoustics and atmospheric sound; 43.30. Underwater sound; 43.35. Ultrasonics, quantum acoustics, and physical effects of sound; 43.38. Transduction,     

Reply to Comment on ＂Mechanism for Alternating Electric Fields Induced-Effects on Cytosolic Calcium＂

Our article （Chin. Phys. Lett. 26 （2009） 017102） was attempting to calculate the possible existence of the window effects on the physiological signal changes by the external electric field. It is attempted mainly to combine the vibrated-ion model of Panagopoulos et al.（Refs. in our article） and the cellular model of Kuster et al. （Ref. in our article） and Tortes et al. （Ref. in our article）. We did not attempt to take the initiative of theoretical bases of both the groups.     

Ho and Ti co-doped BiFe03 multiferroic ceramics with enhanced magnetization and ultrahigh electrical resistivity

Bio.9HOo.lFeo.9503 and Bio.9HOo.lFeo.9Tio.0503 ceramics were prepared and compared to reveal the effects of Ho and Ti codoping in BiFeO3. X-ray diffraction indicated that both ceramics had a high rhombohedral perovskite phase content, and microstructural analyses showed that the grains of the Bio.9HOo.lFeo.9Tio.0503 ceramics were much smaller than those of Bio.9HOo.lFeo.9503. An electrical resistivity of more than 1 × 1014.cm at room temperature, and a magnetic hysteresis loop with a remnant magnetization 2Mr of 0.485 emu/g were obtained for Bi0.9HO0.1Fe0.9Ti0.0503; both were much higher than those of Bio.9Hoo.1Feo.9503. Changes in the defect subsystem of BiFeO3 induced by Fe-deficiency and （Ho,Ti） codoping are proposed as being responsible for the improvement in the properties.     

Ionization and Charge Transfer of Atomic Hydrogen by Highly Charged Ions

Cross sections for charge transfer and ionization of atomic hydrogen by highly charged ions A^q＋ （q =6 9） are evaluated using a simple and classical method based on the previous works by Bohr and Lindhard [K. Dan. Vidensk. Selsk. Mat. Fys. Medd 28 （1954） No 7], Brandt [Nucl. Instrum. Methods Phys. Res. 214 （1983） 93] and Ben-Itzhak et al. [J. Phys. B： At. Mol. Opt. Phys. 26 （1993） 1711]. It is proved that the present calculations are feasible to some extent in comparison with available experimental data and quantum calculations.     

Critical Behaviors in a Stochastic Local Limited One-Dimensional Rice-Pile Model

A stochastic local limited one-dimensional rice-pile model is numerically investigated. The distributions for avalanche sizes have a clear power-law behavior and it displays a simple finite size scaling. We obtain the avalanche exponents Ts= 1.54±0.10,βs = 2.17±0.10 and TT = 1.80±0.10, βT =1.46 ± 0.10. This self-organized critical model belongs to the same universality class with the Oslo rice-pile model studied by K. Christensen et al. [Phys. Rev. Lett. 77 （1996） 107], a rice-pile model studied by L.A.N. Amaral et al. [Phys. Rev. E 54 （1996） 4512], and a simple deterministic self-organized critical model studied by M.S. Vieira [Phys. Rev. E 61 （2000） 6056].     

物理学家库尔恰托夫

 И.B.库尔恰托夫是前苏联著名的物理学家,苏联原子核科学和原子核技术工作最早的组织者和领导者.1943年起为苏联科学院院士.1903年1月12日生于车里雅宾斯克州锡姆村.1920年进入克里米亚大学学习.1923年大学毕业.1925年在列宁格勒物理技术研究所工作.从1930年起任该所实验室主任.1943年,他创建苏联科学院第二实验室.1955年,该实验室被改建成规模宏大的科研中心-原子能研究所.他在去世前一直担任该所所长.1960年该所称库尔恰托夫原子能研究所.他于1960年2月7日去世.     

Reexamining Security of Improved Multiparty Quantum Secret Splitting and Quantum State Sharing

In a recent letter [H.F. Wang, X. Ji, and S. Zhang, Phys. Lett. A 358 （2006） 11], an improvement of the multiparty quantum secret splitting and quantum state sharing protocol [F.G. Deng, et al., Phys. Lett. A 354 （2006） 190.] was presented. We study the security of the improved protocol and find that two or more dishonest participants may recover the secret from the dealer. Hence we further modify the improved protocol, which make it stand against this kind of attack.     

Study of metal grains extracted from chondrite Tsarev L5 using Mössbauer spectroscopy with high velocity resolution

Study of metal grains extracted from ordinary chondrite Tsarev L5 using Mössbauer spectroscopy with high velocity resolution was made for the first time. Three magnetic and one paramagnetic components were revealed in Mössbauer spectrum of extracted metal. These components were related to correspondent phases of Fe–Ni–Co alloy while only two magnetic components related to metal were revealed in the spectrum of bulk meteorite sample. The results obtained were in agreement with metallographic study of metal grains in meteorite Tsarev L5 which demonstrated the presence of four Fe(Ni, Co) phases.     

巴豆种子油的GC-MS分析

巴豆种子经石油醚或无水乙醇提取得巴豆种子油，通过气相色谱－质谱联用仪（GC－MS）测定其中的化学夸分，结果显示，巴豆种子油中含有26个组分，本文确定了其中22个组分的结构。     

GC-MS分析川赤芍挥发油成分

采用水蒸气蒸馏法从川赤芍中提取挥发油,用气相色谱/质谱联用法（GC/MS）检测并分析其化学成分,用归一化法测定其相对含量,结果鉴定出37个成分,占挥发油总成分的86.15％.主要成分为苯甲酸、牡丹酚和邻甲基苯酚.     

庆阳香薷挥发油化学成分的研究

用超临界流体 CO2 (加改性剂 )萃取香薷中的挥发油 ,采用 GC- MS法分析鉴定了挥发油的化学成分。在最佳分析条件下 ,共分离、鉴定出了 4 4种化学成分。其中主要成分为酚类、香薷酮、萜类及其含氧衍生物等     

鸢尾根致香成分分析及在造纸法再造烟叶中的应用

采用同时蒸馏萃取法,从鸢尾根中提取致香成分,对其主要化学成分进行GC/MS分析,用鸢尾根致香成分进行了造纸法再造烟叶加香试验,并将加香后的造纸法再造烟叶样品添加在卷烟配方中进行评吸。结果表明,鸢尾根致香成分中共鉴定出17个化合物,主要含有癸酸和棕榈酸;鸢尾根致香成分能改善造纸法再造烟叶的烟气品质,并具有降低刺激的作用,加香后的造纸法再造烟叶在卷烟中应用也具有相同的效果。     

加速溶剂萃取法提取烟叶挥发性成分条件的优化

以色谱指纹图谱信息量为指标,用正己烷为萃取剂,采用均匀设计法优化了萃取时间、萃取温度和泵入萃取池溶剂量占池体积百分数3个因素对加速溶剂萃取法萃取烟叶挥发性成分的影响,由此提出了一快速测定烟叶挥发性成分的方法。所得萃取液用气相色谱-质谱联用(GC-MS)检测后,用NIST质谱数据库检索进行定性分析,共鉴定出44种化学组分,占挥发油总量的88.87%,所得结果能为烟叶化学成分的研究提供有利的科学依据。     

GC-MS分析香独活挥发油成分

采用水蒸气蒸馏法从香独活中提取挥发油,用气相色谱一质谱联用技术(GC-Ms)检测并分析其化学成分,用归一化法测定其相对含量,结果鉴定出39个成分.占挥发油总成分的83.10%。其中主要成分为4-甲氧基-6-(2-丙烯基)-1.2-亚甲二氧基苯和1-[3-甲氧基-5-羟基苯]-1,2.3,4-四甲基-异喹啉。     

板栗仁衣的挥发性成分

板栗仁衣经水蒸汽蒸馏 ,乙醚萃取挥发性成分 ,通过气相色谱与质谱联用法测定 ,发现板栗的仁衣中含 2 9个组分 ,确定了其中 17个组分的结构     

花椒挥发油的定性鉴别研究

采用水蒸气蒸馏法对不同产地的花椒进行挥发油提取,薄层层析法以及气相色谱-质谱联用技术进行鉴别。通过归一化法测定已鉴定成分占挥发油中的百分含量。     

新疆温郁金块根挥发油化学成分研究

采用水蒸气蒸馏法提取了新疆产温郁金块根的挥发油,经气相-质谱联用仪分析其成分,得到52种组分,采用峰面积归一化法计算各组分的相对含量,结果确定了其中45种化合物的结构。确定了新疆温郁金块根挥发油中主要含新莪术二酮(13.29%)、莪术二酮(10.05%)、β-榄香烯(2.54%)等抗肿瘤活性成分,为进一步全面研究开发温郁金提供科学依据。