Chinese Society of PARTICUOLOGY

PURPOSE The Chinese Society of Particuology is a voluntary organization of workers in research, development and application of the science and technology of particles. The Society is dedicated to fostering liaison and exchange among its members through scientific and technical symposia and seminars of both a national and international nature and to disseminating knowledge on particles through continuing education and publication in the form of scientific transactions and of journals on news and other items of current interest. Its ultimate objective is to serve the country＇s needs for modemization.     

Two Zinc（Ⅱ） Carboxyarylphosphonates with Unusual Polynuclear Zn（Ⅱ） Units：Syntheses and Crystal Structures

[Zn2(PCP)(phen)(H2O)F]n 1 and {[Zn3(MCP)2(phen)2(H2O)]·2.5H2O}n 2(PCP = p-O2C(C6H4)PO33-,MCP = m-O2C(C6H4)PO33- and phen = phenanthroline) were obtained by hydrothermal synthesis and characterized by X-ray single-crystal diffraction.Compound 1 crystallizes in the monoclinic P21/c space group with a = 7.908(2),b = 20.254(3),c = 13.477(2) ,β = 107.76(3)°,V = 2055.7(8) 3,Z = 4,C20H16FN2O6PZn2,Mr = 561.10,Dc = 1.813 g/cm3,μ = 2.463 mm-1,F(000) = 1128,the final R = 0.0340 and wR = 0.0794.Compound 2 crystallizes in the monoclinic P21/n space group with a = 15.629(3),b = 18.141(4),c = 17.723(7) ,β = 121.89(2)°,V = 4267(2) 3,Z = 4,C40H31N4O13.5P2Zn3,Mr = 1041.70,Dc = 1.620 g/cm3,μ = 1.818 mm-1,F(000) = 2108,the final R = 0.0669 and wR = 0.1775.In compound 1,the tetranuclear Zn4 units are linked together by μ4-PCP3- to build 2D(4,4) layers,which are further interconnected through the μ2-bridging fluorion into a 3D framework with 1D phen ligands-filled channels.As for the 3D supramolecular framework of 2,the novel hexanuclear Zn6 units with "chair" conformation are extended by the moieties of μ4-MCP3- ligand to a 2D(4,4) layer on the bc plane,which is viewed as the 2-folded layers in 1.In both compounds,the structures are stabilized by hydrogen bonding interactions and π-π stacking interactions between the phen rings.Additionally,FT-IR spectroscopy and the fluorescent properties are discussed.     

2011年有机质谱系列培训班计划

2010年信立方质谱培训中心举办的有机质谱培训已圆满结束.本年度中心共开办8期有机质谱培训班,培训学员233人,学员涉及各大高校、科研单位、企事业单位、分析检测中心和仪器厂商.     

2011年有机质谱系列培训班计划

2010年信立方质谱培训中心举办的有机质谱培训已圆满结束。本年度中心共开办8期有机质谱培训班,培训学员233人,学员涉及各大高校、科研单位、企事业单位、分析检测中心和仪器厂商。课程内容备受广大学员好评。培训期间共有24位学员获得了培训班的优秀学员奖励。     

Estimates for eigenvalues of stochastic matrices

It is well-known that the eigenvalues of stochastic matrices lie in the unit circle and at least one of them has the value one. Let {1, r 2 , ··· , r N } be the eigenvalues of stochastic matrix X of size N × N . We will present in this paper a simple necessary and sufficient condition for X such that |r j | < 1, j = 2, ··· , N . Moreover, such condition can be very quickly examined by using some search algorithms from graph theory.     

UNIVERSAL INTERPOLATING SEQUENCES ON SPACES OF ANALYTIC FUNCTIONS

This article derives the relation between universal interpolating sequences and some spectral properties of the multiplication operator by the independent variable z in case the underlying space is a Hilbert space of functions analytic on the open unit disk.     

征稿简则

1.《力学学报》是力学学科的综合性学术刊物.它遵循理论与实践统一和百花齐放、百家争鸣的方针,主要刊载:在理论上、方法上以及对国民经济建设方面,具有创造性的力学理论、实验和应用研究论文,综述性的专题论文以及研究简报,学术讨论等,以促进力学学科的发展,为社会主义四个现代化服务,读者对象主要为从事力学工作的科研人员、高等院校师生以及工程技术人员.2.来稿简体字及科技名词术语以国家正式公布的为准;文章内容力求充实精练,公式推导尽量从简;论文不得超过版面字数12000字(约8页印刷页),简报不得超过版面字数6000字(约4页印刷页)(含图、表所占篇幅).插图需用计算机绘制.     

本刊关于稿件、版权等的声明

在投稿、稿件处理、发表等过程中,作者需注意如下问题:1.稿件是作者独立取得的原创性研究成果,无抄袭,无一稿多投,未在国内外公开发表过。2.稿件无政治错误,不涉及保密和拟申请专利的内容,已经过作者单位保密审查。     

三角问题的解析法

我们知道,如果单位圆x^2＋y^2=1与任意角α终边交于点P（x,y）,则有正弦、余弦的定义sinα=y,cosα=x,这样我们遇到三角问题时,可考虑用这个定义把三角问题转化为单位圆上点P（x,y）的坐标问题,用解析几何知识给予解答,请看以下三例．