与组合数有关的一个不等式

建立了与组合数有关的新不等式:设n(n≥2)为自然数,λ＞0,则对k(k=1,2,…,n)满足n≥k λ-2,且x∈(0,1/(n 1))时,有Ckn-1(1/x-λ)(n/(1-x)-λ)k-1 Ckn(n/(1-x)-λ)k≥Ckn 1(n 1-λ)k.     

类氢及碱金属原子激发态寿命的半经典计算公式

根据对应原理,得到了类氢原子能态平均寿命半经典的计算公式τ(n,l),然后利用相对论单通道量子数亏损理论进行推广,得到用来计算考虑总角动量J的激发态寿命公式τ(n,l,l+1/2)和τ(n,l,l-1/2),利用单通道量子数亏损理论得到了碱金属原子n、l远大于1时激发态寿命的半经典公式τ(n.l)=τ0(m+M/nm/v/+M)2v7l(l+1/2)/n4,其计算结果和实验数据符合的很好.     

Design and Fabrication of 1.06 μm Resonant-Cavity Enhanced Reflective Modulator with GaInAs/GaAs Quantum Wells

A resonant-cavity enhanced reflective optical modulator is designed and fabricated, with three groups of three highly strained InGaAs/GaAs quantum wells in the cavity, for low voltage and high contrast ratio operation. The quantum wells are positioned in antinodes of the optical standing wave. The modulator is grown in a single growth step in an molecular beam epitaxy system, using GaAs/AlAs distributed Bragg reflectors as both the top and bottom mirrors. Results show that the reflection device has a modulation extinction of 3 dB at -4.5 V bias.     

Independence of the brittle–ductile transition from the rubber particle size for impact‐modified poly(vinyl chloride)

A series of acrylic impact modifiers (AIMs) with different particle sizes ranging from 55.2 to 927.0 nm were synthesized by seeded emulsion polymerization, and the effect of the particle size on the brittle–ductile transition of impact‐modified poly(vinyl chloride) (PVC) was investigated. For each AIM, a series of PVC/AIM blends with compositions of 6, 8, 10, 12, and 15 phr AIM in 100 phr PVC were prepared, and the Izod impact strengths of these blends were tested at 23 °C. For AIMs with particle sizes of 55.2, 59.8, 125.2, 243.2, and 341.1 nm, the blends fractured in the brittle mode when the concentration of AIM was lower than 10 phr, whereas the blends showed ductile fracture when the AIM concentration reached 10 phr. It was concluded that the brittle–ductile transition of the PVC/AIM blends was independent of the particle size in the range of 55.2–341.1 nm. When the particle size was greater than 341.1 nm, however, the brittle–ductile transition shifted to a higher AIM concentration with an increase in the particle size. Furthermore, the critical interparticle distance was found not to be the criterion of the brittle–ductile transition for the PVC/AIM blends. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 696–702, 2006     

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用TSC程序模拟了EAST装置等离子体放电的全过程。模拟中考虑了自举电流，并加入了离子回旋共振加热ICRH和快波电流驱动FWCD，得到了中心电子温度4.5keV、中心离子温度3.8keV、中心电子密度1.2×1020m–3的D形截面的等离子体。根据模拟结果对EAST装置进行了伏秒数分析，并研究了不同等离子体电流上升时间、有效电荷数Zeff对放电的影响。     

太极学说在普通高校太极拳教学中的运用

就将太极学说运用到太极拳教学中,提出了几种阴阳辩证的教学方法.实践证明,这些教学方法可达到事半功倍的效果,应该在普通高校太极拳教学中广泛推广.     

s+id波高温超导体的单根涡旋线结构

用松弛叠代法数值求解了在s+id混合波对称性考虑下的Ginzburg-Landau方程，得到s+id高温超导体单根涡旋线的结构，并研究了其随温度磁场变化的特性.同时，也计算了在该考虑下的上临界场H_c2的曲线，相应的数值结果与实验结果定性一致. 关键词：     

A Novel Organic—Inorganic Complex：Synthesis and Crystal Structure of [Ca（DMSO）5（H2O）]2 SiMo12O40

It is becoming a focus to synthesize and assemble organic-inorganic materials, especially, to synthesize charge-transfer complexes formed by polyoxometalate and organic donors. They have attracted much attention because such complexes are active in their electric, magnetic and optic properties1-4, many investigations about them have been done and some crystal structures of them were reported5-6. But, the disadvantage of these crystals is instability at room temperature. According to the view…     

一种新型Au(Ⅲ)-吡啶酰胺配合物的合成，表征及其与5′-单磷酸鸟苷的反应研究

利用四氯合金酸和N-4-甲基苯基2-吡啶甲酰胺(HL)反应，合成得到了一种新的Au(Ⅲ)配合物：二氯(N-4-甲基苯基2-吡啶甲酰胺合金(Ⅲ)[Au(L-N，N′)Cl₂]。并通过元素分析、红外光谱、核磁共振谱、质谱及X-射线单晶衍射对其进行了表征。结构分析表明，Au(Ⅲ)由二个氮原子和二个氯原子配位，呈平面四方形结构。质谱研究发现，该化合物与5′-单磷酸鸟苷(5′-GMP)反应生成[Au(L-N，N′)(5′-GMP)₂]。     

双安息香缩乙二胺的合成及其配位性质

合成了双安息香缩乙二胺及其与 Ni( )、Pd( )、Pt( )、Zn( )、Cd( )和 Hg( )的配合物 ,并经质谱、红外光谱、元素分析和电子光谱等方法所表征 ;测定了溶液中配合物的稳定常数 ,并就该配体的特殊配位性质进行了讨论。