瓣形均匀带电面在其直径处的电势分布

从点电荷的电势计算公式出发推导出了瓣形均匀带电面在其直径处的电势分布.进一步讨论了均匀带电半球面在其底面以及均匀带电球面内部和外部的电势分布.     

亲和标记-基质辅助激光解吸电离飞行时间质谱用于蛋白质相对定量方法的研究

将亲和标记技术和基质辅助激光解吸电离飞行时间串联质谱联用,建立了蛋白质相对定量方法,以牛血清白蛋白为实验对象,考察了该方法的准确度、重现性等指标;又以数种标准蛋白混合物为研究对象,考察了该方法的动态范围及相应的标准偏差,为实际生物样品中差异蛋白质分析奠定了基础。     

Direct reaction of meta powders with several sodium dithiocarbamates

Copper and nickel powders react directly with sodium dithiocarbamates in organic solvents and produce the corresponding metal complexes. The rate constants have been estimated spectrohotometrically. The effects of organic solvents and substituents of the carbamates on the relative reactivity were studied. The results show that copper powder reacts in chloroform more readily than any other system examined. This reaction has been successfully applied to the determination of copper contents in brass and bronze powders.     

Vacuum ultraviolet photon emission stimulated by H2+, N2+, and CO+ collisions with surfaces

Intravalence and Rydberg-type electronic transitions from excited projectile atoms and ions have been observed in the spectral range 30-200 nm as a result of 3 keV H⁺₂, N⁺₂, and CO⁺ bombardment of magnesium and graphite surfaces. Population of both types of excited states is consistent with an electron promotion mechanism resulting from close atomic encounters.     

The inelastic neutron scattering spectrum of chloroform in solution

The incoherent inelastic neutron scattering (INS) spectrum of CHCl₃ in liquid SO₂ (ambient temperature) in the region 0–3600 cm⁻¹ is presented. For the first time it has been demonstrated that good quality INS data on solutes can be obtained over this energy transfer range. A discussion of suitable solvents for further work is included.     

On the problem of weights in multiple criteria decision making (the noncompensatory approach)

This paper shows how the notion of ‘relative importance of attributes’ can be defined within the framework of the noncompensatory approach to multiple criteria decision making. The problem of weights then appears as a problem of functional representation of relations. We state some theoretical results concerning this problem and outline a practical decision-aid (Tactic) based on the ideas introduced in the paper.     

Factorizable and meson-pole contributions to hyperon nonleptonic decays

All vacuum-insertion contributions to hyperon nonleptonic decays can be identified within the framework of current algebra. The contribution to the s-wave amplitude has been identified by Donoghue, Golowich, Holstein, and Ponce. His pointed out that the p-wave factorizable term for the penguin operator which is not normal-ordered emerges from the disconnected contributions to the baryon poles. This separable amplitude is shown to be equivalent to the K-meson pole in the normal-ordering representation. The inclusion of a kaon pole is thus mandatory in the normal ordering scheme, but is negligible if the weak hamiltonian is not normal-ordered.     

Hunting the hidden standard Higgs

The mass of the Higgs scalar of the standary theory may be estimated through its influence on radiative corrections from a precise measurement of M_Z and sin²θ_W at SLC or LEP.     

涡轮叶栅前缘槽缝气膜冷却的数值模拟

应用FINE/TURBO软件包,求解三维雷诺平均N-S方程,对叶片前缘有两列冷却槽缝的气膜冷却流场进行了数值模拟,获得了不同吹风比下叶片表面静压分布与极限流线.在计算结果与实验数据良好符合的基础上,详细分析了槽缝冷却三维定常流场结构与槽缝附近的流动细节.研究结果表明,槽缝冷却对前缘压力分布影响较大,且在压力面引起较大的分离流动,不利于冷却.