筼筜湖CDOM的三维荧光光谱及其污染示踪研究

测定了2008年4～5月厦门筼筜湖52个CDOM样的三维荧光及吸收光谱,以探讨利用其光谱特征示踪高污染近海浅水湿地生物修复过程中有机污染程度的可行性。利用平行因子分析对三维荧光光谱进行解谱。结果表明,筼筜湖CDOM可识别出3类5个荧光组分,包括类腐殖质荧光组分C1(240,325/422 nm)和C5(260,380/474 nm)、类蛋白质荧光组分C2(225,275/350 nm)和C4(240,300/354 nm)以及有机污染组分C3(225/342 nm),其中C3可作为外来有机污染物输入的指纹特征。松柏湖干渠及污水处理厂排放口C3组分及DOC浓度很高,表明周边污水输入是筼筜湖有机污染的主要来源。类腐殖质荧光组分C1及吸收系数a(280)与COD之间、类蛋白质荧光组分C2与BOD₅之间均具有很好的线性相关关系,表明CDOM的光谱特性可很好地指示有机污染程度,对评价有机污染严重水域生物修复作用机理及效果有重要的参考价值。     

The Rule of the Separation Factor Changing with Carbon Number for Fullerenes in High-Performance Liquid Chromatography

At present a big part of fullerenes are produced from high pure graphite electrode, and the products are mixtures of C₆₀, C₇₀ etc. Because they are of very similar structure, their physical and chemical properties are very similar,so the separation of the mixture is one of the most interesting subjects. Recently,HPLC is generally applied to do this work, and this method is now still in the phase of research and development. Based on the work of other people and on thermodynamic theory of chromatography, a quantitative relationship model between the separation factor and carbon number of fullerenes in HPLC is proposed in this paper,and verified successfully by different author's experimental data in different papers.     

功能聚碳酸酯的合成及表征

脂肪族聚碳酸酯作为生物材料已引起普遍关注,由于其良好的生物相容性、表面溶蚀性和无毒性,在医学领域中得到越来越广泛的应用.迄今已报道的许多脂肪族聚碳酸酯的降解速率相对较慢,如聚三亚甲基碳酸酯的降解速率比聚乳酸和聚己内酯慢很多.但是,如果在聚碳酸酯的侧链上引入亲水性功能基团,其降解速率将会明显提高.     

DF激光器燃烧室反应流场的一种新的计算求解方法

 使用了一种新的方法来计算燃烧驱动DF激光器燃烧室多组分化学反应流场。首先引入了元素的分布方程,然后根据化学平衡的热力计算方法求解每一位置的组分及温度。这样,在计算低速流场时,就避免了处理化学反应源项引起的数值计算过程中的方程刚性问题,也减少了组分方程的数量。结果显示,这种燃烧室的注氦方式能够在一定程度上冷却燃烧室壁面。     

The Novel Properties of the Environment in Independent Oscillator Model

The novel properties of the environment are found in independent oscillator model. 1) If the initial state of the composite system lies in thermal equilibrium, then the environment is equipartition of energy, which, however, is moving with the system. 2) When the environment is in thermal equilibrium, but the system deviates from it at the beginning, the environment is no longer equipartition of energy, but which still moves with the system. These properties are quite different from those of the collection of oscillators discussed by Ford et al. (see Ref. [9])     

Instantaneously Dynamical Response and Correlation Functions in Independent-Oscillator Model

For the independent-oscillator model (IOM), the explicit expressions of the instantaneously dynamical response functions (Χ₁ + Υ,t₁), X(t₁ + Υ,t₁)) and correlation functions (φ(t₁ + Υ,t₁)+Φ(t₁ + Υ,t₁)) for both the system and environment are derived. It is shown that for external perturbation the environment of IOM is dynamically stable and the system is oscillatory. Although the external perturbation exists, there is still strongly temporal correlation for the system, for the environment, however, the temporal correlation quickly decays with the second time variable Υ and is almost independent of the first time variable t₁, nevertheless is significantly affected by dissipation. It is shown that the environment behaves as a heat bath from the dynamical point of view.     

Stochastic Resonance in Nonequilibrium Single-Stable System

The harmonic noise is used as an external stochastic source in non-Markovian equilibrium system. A bi-peak resonance phenomenon is carried out due to the external nohe frequency close to the frequencies of damped linear-oscillatpr and internal noise, respectively.     

Relativistic BUU Equation

Based on the Waleck's models QHD-Ⅰ and QHD-Ⅱ describing the nucleon-nucleon interaction,the Boltzmann-Uehling-Uhlenbeck (BUU) equation,which is the time evolution of the nucleon distribution function including the Hartree and Fock self-energy terms as well as the Born collision term and its exchange term,has been derived by using the closed-time path Green's function technique and assuming that the Green's functions and the self-energy terms are slowly varying functions of the centre-of-mass coordinates.Our result shows that the BUU equation for proton and that for neutron are simultaneous each other.     

THE HEDGEHOG SCLUTICN OF CHIRAL BAG

The hedgehog shape is assumed to have the spherically symmetric solutions both for linear and nonlinear hybrid bag models in the zero-loop approximation.The hedgehog solu-tions are obtained for all versions of the chiral bag.The variations of the energy with the bag radius are discussed.     

DESCRIPTIONS OF THE EQUILIBRATION PROCESS OF THE INTRINSIC DEGREES OF FREEDOM AND DISSIPATIVE PROCESS OF THE NUCLEAR COLLECTIVE MOTION

In this paper the Hamiltonian model is used for studying the nuclear dynamics by taking both the one-body and two-body interaction mechanisms into account. On the basis of the Von Neuman equation the coupling between the collective motion and the single particle degrees of freedom is discussed. Thus, the equations obtained are physically transparent and easy for numerical computations. They may be useful for describing the dissipative process of the nuclear collective motion as well as the equilibration process of the intrinsic degrees of freedom.