非平衡超导铅膜中的非均匀能隙态

用两个重叠的铅隧道结进行实验,当注入电流很大时在铅膜中观察到了非均匀能隙态,铅膜中出现非均匀态的功率阈值比铝膜大得多。 关键词：     

超弦Bethe-Salpeter方程

本文分析了超弦场的束缚态概念。运用Schwinger泛函方法导出了超弦场四弦Green泛函所满足的方程,得到了相应的波泛函满足的齐次方程,导出了束缚态波泛函的正交归一关系式。     

ADENYLATE CYCLASE-MODULATING MEDIATORS OF INSULIN

Plasma membranes prepared from pig liver incubated with insulin (50—300 μU/ml) resulted in the release of at least two insulin chemical mediators. They appeared to modulate the activity of adenylate cyclase in liver plasma membrances of pig. One of them was fraction 1 of insulin mediator (M. W. about 3700—4000 dalton) which markedly stimulated the activity of the enzyme, the other was fraction 2 of insulin mediator (M. W. about 1000 dalton) which inhibited the enzyme activity. The results showed that the inhibitor of fraction 2 generated was significantly higher than that of fraction 1 when the membranes were incubated with insulin of low concentration (50—100 μU/ml). On the other hand, the generation of stimulator of fraction 1 from plasma membranes incubated with insulin of high concentration (200 μU/ml) was higher than that of fraction 2. So the ratio of yield between two mediators produced from the membranes was dependent on the concentration of insulin added. The results also showed that the     

采用Authorware 5制作现代光学实验多媒体课件

我们采用目前最流行的多媒体制作软件Authorware 5开发工具，把现代光学实验原理，公式推导，实验内容，步骤等字材料，以及用CCD采集的干涉图像，优美的背景音乐及解说词等多种数学信息，制作成多媒体课件，可直接用于远程教育，有较大的实用价值。     

THEORETICAL RESEARCH ON OPTICAL,THERMAL AND MAGNETIC PROPERTIES OF DICHLOROTETRAPY-RAZOLENICKEL(TYPE II)COMPLEX

In this paper, we have calculated and analyzed theoretically and consistently the absorption spectra, the ZFS and EPR parameters of the ground state, the Schottky low-temperature heat capacity, and the paramagnetic susceptibility of Ni(pz)₄Cl₂ (Dichlorotetrapyrazolenickel) complex by using d⁸[(1-C₂)D^*_4h+C₂D^*_2h] complete configuration mixing unified crystal field theory. The theoretical results agree with the experimental observation very well. We can give a complete and reasonable theoretical interpretation of the optical, thermal and magnetic properties of Ni(pz)₄Cl₂.     

一类含P拉普拉斯算子的非线性椭圆边值问题解的存在性

利用非线性增生映射值域的扰动定理 ,研究了非线性椭圆边值问题 (@)在 Ls(Ω) ,p s<+∞中解的存在性 .(@) -△ pu +g(x,u) =f a.e.在Ω中-〈v,| u|p-2 u〉∈βx(u(x) ) a.e.在Γ上其中 f∈ Ls(Ω) ,p s<+∞给定 ,Ω RN为有界锥形区域 ,△ pu=div(| u|p-2 u)为 P拉普拉斯算子 ,max(N ,2 ) p<+∞ ,v为Γ的外法向导数 ,g∶Ω× R→ R满足 Caratheodory条件 ,对 x∈Γ ,βx 是正常、凸、下半连续函数 φx=φ(x,· )的次微分 ,其中 φ∶ Γ× R→ R.本文推广了魏利和何震所讨论的非线性问题的边值条件 .     

推广Bethe公式：Au50+离子的偶极激发的碰撞强度和速率系数

快速算法结合推广的Bethe公式,可以为应用研究提供便于使用的偶极激发碰撞强度和速率系数.用准相对论平面波Born(QRPB)近似计算高能区Au⁵⁰⁺离子n₀l₀→nl偶极激发的碰撞强度,给出Bethe公式中动量转移截断参数k₀,从而确定激发过程的高能行为.快速计算方法中采用了Cowan所发展的准相对论方法,用统一的Hartree-Fock-Slater势计算束缚和连续态电子波函数.用准相对论扭曲波(QRDW)近似计算阈值附近的碰撞强度并外推阈值处的碰撞强度Ω₀,然后拟合到高能碰撞强度上.对于特殊情况还需增加三倍阈值点a的计算,用三个参数Ω₀,Ω_a和k₀拟合出全能域(出射电子能量ε_b=0—∞)的碰撞强度.由此可以得到全部温度范围(电子温度T_e=0—∞)的速率系数<σv>.这样得到的Ω和<σv>,在相应的感兴趣的能量和温度范围内有合理的精度. 关键词：     

组合数学方法推引原子谱项

本文引用组合数学方法推引原子谱项，极其简便迅速。所导出的推引公式十分简洁，易于掌握，应用方便灵活。这种推引原子谱项的方法适用于各种等效和非等效电子组态的原子体系。     

太阳风等离子体输出流量的全日面二维结构

本文根据1983年十个 Carrington 周(1733—1742)期间的 K-日冕亮度、行星际闪烁(IPS)观测和光球磁场观测,首次探讨了太阳风等离子体质量、动量和能量输出流量 F_M,F_P 和 F_E 的全日面二维平均结构及其与光球磁场结构的关系.     

SPECIFIC HEAT OF A HEISENBERG SYSTEM WITH FINITE SIZE

Based upon the spin wave theory, the influence of the size of a three-dimensional Heisenberg system on its thermodynamic properties was studied. It is found that the specific heat increases due to the finite size and free surface of the system. For a magnetic film with finite thickness, the interaction of spin waves was also discussed. There exist three additional scattering processes, namely, the scattering between spin waves with wave-vectors parallel to the surface of the film (two-dimensional spin wave), the scattering between two and three-dimensional waves, and the scattering between those waves with the same component in the direction along the thickness of the film. As a result, the T⁴ term, arising from the coupling of spin waves, in the expression of the specific heat of the system, splite into three parts proportional to T^5/2,T^7/2 and T⁴, respectively. Here T is the temperature.