查询词典 quantum theory

Models of pentahedron, hemisphere, spherical cap quantum dots as well as the combinations of the quantum dots of plane, pentahedron and spherical cap are set up.

建立金红石TiO_2(001)面五面体形状量子点、半球形状量子点、球缺形状量子点以及平面、五面体和球缺组合形状量子点的点阵模型。

The most parts of thesis as follows:1. Five symmetrical intra-molecular charge transfer oligomeric phenylene vinylene light emitting materials were designed and synthesized using oligomeric phenylene vinylene as a framework.2. The structures of target molecule were characterized by ~1HNMR,~(13)CNMR, IR, MS and element analysis.3. In order to study the influence of the location and numbers of electron-donor and electron-acceptor on their photoelectric performance by changing length of OPV chain, the UV spectra and fluorescence spectra of target compounds has been compared. We have researched into main factors effecting on material emitting red-shift; organic electroluminescence device was prepared using the compound P4. The capability of eletroluminescence was researched.4. The photoelectric properties of P4 was explained by quantum chemical calculation (the Gaussian 98 quantum chemistry program). It is greatly contributed know the whole process of charge transfer to guide the design of red emitters.

本文研究的内容主要包括以下部分：(1)设计并合成5个对称的以齐聚苯乙烯类为骨架的分子内电荷转移型齐聚苯乙烯类发光材料；(2)通过IR，MS，~1H-NMR，~(13)C-NMR和元素分析对所合成的目标化合物进行表征；(3)通过对目标化合物的紫外光谱和荧光光谱比较分析，研究改变OPV的长度，电子给体和电子受体的位置及数量对其光电性能的影响，探讨材料发射红移的主要因素；选取性能良好的目标化合物P4制备成OELD器件，对其电致发光性能进行研究；(4)运用Gaussian98量子化学程序包，采用量子化学方法对目标化合物P4的光电性能从理论加以解释，进一步认识荷移跃迁的整个过程，为红光材料的设计加以指导。

Recently, photoemission spectroscopy has been widely used for the study of quantum well states in films, several models have been developed to explain the relationship of the discrete quantum well states and photoemission spectroscopy.

近年来，光电子谱被广泛应用于薄膜中量子阱态的研究。为解释薄膜中分立的量子阱态和薄膜的光电子谱间的关系，发展了一些理论模型。

Compared with HA in water-contained organic solvents, the pigment in micelle had higher pKa value and higher fluorescence quantum yield. Moreover, the quantum yield of active species produced from photosensitization, 1O2 and ·OH, increased as well. As a result, the photosensitivity of HA was enhanced.

相对于含水有机体系，HA在胶束中基态的 pKa值升高，荧光量子产率增大，光敏反应产生的活性中间体1O2 和·OH的产额增加，从而提高了其光敏活性，这在光敏损伤作用中具有重要的生物学意义。

The time evolution of expectation values of the basic dynamic variables in a quantum system under different effective Planck constant were compared with the exact values of the basic dynamic variables in classical system. It is found, for the regular motion, the difference comes from the quantum effect; for the chaotic motion, it comes from the dynamical effect and the destruction of the dynamical system.

通过引入等效普朗克常数，将量子系统中基本动力学变量的期望值和经典系统中基本动力学变量的精确值的时间演化行为相比较，分析了两者产生差异的因素，规则运动主要是和量子效应有关，而混沌运动则是和动力学效应有关，即与系统的动力学对称性破坏相联系。

And the quantum quadratic residue codes. Isometries and equivalences of quantum codes also are researched.

详细研究了量子二次剩余码与经典二次剩余码的关系，并对量子二次剩余码做了好的扩展。

It is significant to study the quantum entanglement quantitatively and qualitatively and its application in the field of quantum information.

量子纠缠是量子通信和量子计算的基本资源，并且还能验证量子力学的基本问题。

This article introduced the fundamental calculate method of quantum chemistry and the use of Quantum chemistry method in biomolecule field during this two years.

本文介绍了量子化学的基本计算方法，并综述了近两年来量子化学方法在生物分子领域的研究进展。

By using the quantum jump approach, we show that the efficiency depends intimately on the quantum interference among states in which the excitation is localized on individual sites in the antenna.

补充：通常情况下要在室温下实现宏观量子相干很难，但考虑到光合反应中电子转移过程的时间在飞秒量级，在超短时间内维持室温宏观量子相干或许是可行的。

The challenge was to confine electrons tightly in a 'quantum wire' and bring this wire close enough to an ordinary metal so that the electrons in that metal could 'jump' by quantum tunneling into the wire.

所面临的挑战是在一个'量子线'里紧紧地控制住电子，把这根电线接近普通金属这样一来就可以使金属中的电子以"跳跃"的方式使量子穿梭于电线间。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。