实现冷原子(冷分子)囚禁的可控制光学双阱的产生及其实验研究

简单介绍了实现冷原子或冷分子囚禁的可控制光学双阱的实验方案，报道了二元π相位板的制作方法及其产生可控制光学双阱的实验结果.分析了光学双阱参数(如空间位置、双阱中心间距、相对光强分布等)与π相位板相位偏差的关系.从理论和实验上研究了由于二元π相位板的刻蚀厚度误差引起的光学双阱光强变化及其双阱到单阱的演化规律，得到了实验与理论基本一致的结果. 关键词： 二元相位板 可控制光学双阱 冷原子囚禁 冷分子囚禁     

On assigning drivers for a home-delivery system on a performance basis

Consider a firm providing home-delivery of small parcels within a short period of time. The paper proposes a method to estimate the productivity of each driver on any fictitious route using linear regressions. The method separates the trip time in terms of the time spent: with customers, driving, and all other activities. Our tests show that productivity, measured in terms of number of customers visited per hour, vary across drivers. Even more, the same driver’s productivity vary for peak and off-peak demand periods considerably. This methodology should enhance the reliability of the driver scheduling programs, since it reduces the error and bias of the productivity offered by the assigned set of drivers. It shall also improve the reliability of the delivery time promised to the customer.     

Potassium tetraphenylimidodiphosphinate complex of 1,4,7,10,13,16-hexaoxacyclooctadecane an inorganic (carbon-free) chelate ring

Summary Potassium tetraphenylimidodiphosphinate, [K][Ph ₂P(O)NP(O)Ph ₂], reacts with 18-crown-6 ether to give the monohydrated complex [K(18-crown-6][Ph ₂P(O)NP(O)Ph ₂]·H₂O. The compound shows an interaction potassium-oxygen, forming an inorganic (carbon free) chelate ring and it is different to the sulphur homolog which has no interaction cation-anion.

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Kaliumtetraphenylimidodiphosphinat-Komplex von 1,4,7,10,13,16-Hexaoxacyclooctadecan. Ein anorganischer (Kohlenstoff-freier) Chelat-Ring

Zusammenfassung Kaliumtetraphenylimidodiphosphinat, [K][Ph ₂P(O)NP(O)Ph ₂], reagiert mit 18-Krone-6-ether unter Ausbildung des mohydydratisierten Komplexes [K(18-Krone-6)][Ph ₂P(O)-NP(O)Ph ₂]. Die Verbindung zeigt eine Kalium-Sauerstoff-Wechselwirkung under Formierung eines anorganischen (Kohlenstoff-freien) Chelat-Ringes. Dies ist im Gegensatz zum Schwefel-Analogen, das keine Kation-Anion-Wechselwirkung zeigt.

     

On Neumann-Bessel series

In this paper, we shall introduce a kind of biorthogonal series: Neu mann-Bessel series, then give an expression of kernel functions, an equiconvergence theorem, and finally discuss its application in Bessel series.     

Collision-induced absorption of infrared radiation by N2, O2 and CO2

The collision-induced absorption of the symmetric vibration of CO₂ has been observed in the pure gas at densities from 20.0 to 40.0 amagat and at temperatures of 273, 298, and 323 K using infrared techniques. From the integrated intensities of the bands and using the (exp ?4) model of van Kranendonk, it is possible to deduce a value for the first derivative of the quadrupole moment with respect to the vibrational coordinate. For CO₂ the contribution from quadrupole distortion to the binary absorption coefficient is reported for several temperatures. The (exp ?4) model of van Kranendonk is used to calculate the binary absorption coefficients for the fundamental vibrational bands of N₂ and O₂ at temperatures from 70 to 340 K. The parameters λ and p/σ describing the magnitude and range of the short-range collision-induced dipole moments were determined using the known experimental absorption coefficients. The contributions from atomic distortion and quadrupole distortion to the binary absorption coefficient are calculated for N₂ and O₂.     

钨酸铅晶体中与氧空位相关的色心研究

采用基于相对论性密度泛函理论的离散变分和嵌入团簇方法计算了PbWO4晶体中与氧空位VO及其相关色心的态密度分布，并运用过渡态方法计算了其激发能.结果表明：VO的存在可以使WO42-基团的禁带宽度明显变小；PbWO4晶体中VO可以产生F+，并且F+的存在可以使晶体引起420nm的吸收，另外PbWO4晶体中VO可能不会产生F心. 关键词： PbWO4晶体 密度泛函 氧空位 态密度分布     

相铬红颜料的相组成和表征

本文用X射线衍射分析方法，研究铝铬红颜料的相组成和合成条件关系，发现按NazCrO, " 2HZ0 : NazMoOa : Pb(NO,)z=85 : 15 : 110mo1原料比，用共沉淀方法合成的颜料均由黄色铬酸铅和红色铝铬酸铅固溶体组成.二者比例受合成条件变化而有很大差别。指标化结果表明:红色相钥铬酸铅固溶体属单斜晶系，空间群C.'z/c.a:7. 250(8) } ,6:12. d4d ( 7 )人,c:5.119(5)人，夕=132. 58 (6 )0，化学式Pb (Cro. eeMoo. }z )U:每个单胞由四个分子组成所得粉末衍射的数据可以代替)CPDS19-685号卡片.可以用定量PbCrO，相含量的方法来表征颜料的质量。     

结构分支型初始后屈曲中有限元平衡方程组的解法

根据结构分支型初始后屈曲中有约束的有限元平衡方程组的特点，推导了一种具有工程实用价值的变换方法，将其化为无约束的线性方程组，并给出了数值算例。     

对40Ca9.5—10.5MeV能区内几组核能级宽度的测量

本文介绍了用γ共振吸收法测量⁴⁰Ca 9603.9keV,10321.0keV两组能级和9864.6,9868.8keV一组双重态能级的能级宽度,选用³⁹K(p,γ)反应所放出的γ射线激发相应的⁴⁰Ca吸收核能级。对于9603.9keV,10321.0keV的能级宽度,这里给出了比较精确的结果,相应的能级宽度分别为Γ=188±47eV,Γ=91±15eV。对于9864.6,9868.8keV能级,结果为Γ=100±24eV,Γ=899±214eV,由于⁴⁰Ca 9864.6,9868.8keV两能级靠得很近,因此这里用γ共振吸收法测量它们的能级宽度与以往有所不同,将同时有两组γ射线用来激发同样两个能级而发生交叉激发。我们对相应的实验处理方法作了推广。此外,用(p,γ)共振产额法测量了⁴⁰Ca 9603.9keV,10321.0keV能级宽度,得到了与γ共振吸收法一致的结果。本文还对⁴⁰Ca 9603.9keV,10321.0keV能级的(p,γ)共振强度S_pγ、同位旋T等进行了讨论。 关键词：