A Generalized Soft-Sphere for Monte Carlo Simulation

A new collision model, called the generalized soft-sphere (GSS) model, is introduced. It has the same total cross section as the generalized hard-sphere model [Phys. Fluids A 5, 738 (1993)], whereas the deflection angle is calculated by the soft-sphere scattering model [Phys. Fluids A 3, 2459 (1991)]. In virtue of a two-term formula given to fit the numerical solutions of the collision integrals for the Lennard-Jones (6-12) potential and for the Stockmayer potential, the parameters involved in the GSS model are determined explicitly that may fully reproduce the transport coefficients under these potentials. Coefficients of viscosity, self-diffusion and diffusion for both polar and nonpolar molecules given by the GSS model and experiment are in excellent agreement over a wide range of temperature from low to high.

“微/纳系统国际会议(ICMNS 2002)”简介

<正>由中国力学学会、中科院力学所非线性力学国家重点实验室（LNM）、香港中文大学和香港科技大学联合主办的“微/纳系统国际会议（ICMNS 2002）”于 2002年8月11～14日在云南昆明万怡酒店隆重举行. 该会议国际学术委员会主席为中科院力学所郑哲敏院士,联合主席为中科院力学所白以龙院士、美国UCLA何志明教授和中科院副院长江绵恒研究员;国际程序委员会主席由中科院副院长白春礼院士担任;中科院力学所赵亚溥研究员和香港中文大学的李文荣分别担任大会组织委员会主席和联合主席.出席会议的正式代表为150人,其中来自北美、欧洲、亚洲以及港台地区的境外代表为47人.正如何志明教授所

中国科学院力学研究所2002年度科研进展

<正> 2002年是力学所整体进入院知识创新工程试点的第二年,对力学所科研人员而言,这是十分充实的一年.力学所在中科院新时期办院方针的指引下,锐意进取,在诸多方面取得了重要的进展.

2002年度非线性力学国家重点实验室学术年会简介

<正> 2002年度非线性力学国家重点实验室(LNM)第14届学术年会于2002年12月21—22日在中国科学院力学研究所隆重举行.本次年会受到了所内外学术同行的广泛关注和重视,有10余个单位的近200人参加了本次LNM学术年会.

Characterization of airborne carbonate over a site near Asian dust source regions during spring 2002 and its climatic and environmental significance

IEECAS SKLLQG

Determination of rare and rare earth elements in soils and sediments by ICP-MS using Ti(OH)(4)-Fe(OH)(3) co-precipitation preconcentration

A method was developed for the determination of trace and ultratrace amounts of REE. Cd. In. Tl. Th. Nb, Ta. Zr and Hf in soils and sediments. With NaOH-Na2O2 as the flux. Ti(OH)(4)-Fe(OH)(3) co-precipitation as the preconcentration technique and inductively coupled plasma mass spectrometry (ICP-MS) for measurement, the whole procedure was concise and suitable for batch analysis of multi-element solutions. An investigation was carried out of the Ti(OH)(4)-Fe(OH)(3) co-precipitation system, and the results obtained showed that the natural situation of Ti tightly coexisting with Nb. Ta, Zr and Hf in geological samples plays a very important role in the complete co-precipitation of the four elements. The accuracy of this procedure was established using six Chinese soil and sediment certified reference materials (GSS and GSD). and the relative errors between the found and certified values were mostly below 10%.

Cloning and sequencing of the phycocyanin gene from Spirulina maxima and its evolutionary analysis (vol 14, pg 307, 2002)

The geneswere cloned for the two apoprotein subunits, alpha and beta, of phycocyanin from the cyanobacterium Spirulina maxima (=Arthrospira maxima) strain F3. The alpha- and beta-subunit gene-coding regions contain 489 bp and 519 bp, respectively. The beta-subunit gene is upstream from the alpha-subunit gene, with a 111-bp segment separating them. Similarities between the alpha-subunits of S. maxima and nine other cyanobacteria were between 58% and 99%, as were those between the beta-subunits. The maximum similarity between the alpha- and beta-subunits from S. maxima was 27%.