毛细管气相色谱法分析液化石油气中二甲醚

建立了液化石油气中二甲醚的毛细管气相色谱分析方法.利用丙酮作为溶剂吸收液化石油气中二甲醚,采用HP-1毛细管色谱柱进行分离,以氢火焰离子化检测器检测,外标法进行定量分析.二甲醚的体积分数在0.5%～30.0%范围内与色谱峰面积呈良好线性关系,二甲醚的定量下限为0.2%,测定结果的相对标准偏差为2.3%～7.3%(n=6...     

银行间债券市场的外部效率:基于商业银行的视角

以参与我国银行间债券市场的商业银行为研究对象,运用面板数据模型检验银行间债券市场的外部效率对于商业银行经营绩效的影响.实证结果表明:我国银行间债券市场的发展对于商业银行的盈利能力和流动性管理水平均有较强的外部正效率,而对于商业银行传统盈利模式和风险管理则具有负面影响.建议商业银行应利用银行间债券市场的外部正效率提高其资产负债管理水平,通过提升自身经营管理水平来降低银行间债券市场外部负效率对自身的影响;此外监管当局还应该降低小型金融机构进入银行间债券市场的门槛,以发挥该市场外部正效率对化解区域金融风险的作用.     

体外预应力加固的技术研究

通过ANSYS有限元模型, 以体外预应力筋为研究对象, 对体外预应力加固的关键技术 进行了研究, 得出体外预应力的作用位置, 尽可能拟合原结构的受力状况, 保证 加固工程的安全性; 体外预应力的补强力筋, 应采用等效面积的置换原则, 使施工的过程 趋于合理; 体外力筋的连接装置, 应该``适、薄、强'; 在加固工程中, 体外预应力筋 纵向交错布筋的设置, 能提升结构的整体延性.     

考虑翻箱的场桥调度和提箱集卡数量的集成优化

在集装箱码头的进口箱堆场中,码头预约机制、待提箱的实时位置和场桥作业调度方案是制约堆场作业效率和堵塞情况的关键。为缓解进口箱堆场的拥塞情况并提高作业效率,在固定的预约时段内,考虑实时压箱量最少的翻箱规则,兼顾场桥间不可跨越和保持安全间距等现实约束,以场桥最长完工时间最小为目标,构建数学优化模型,设计了嵌入修复算子的改进遗传算法用于求解;通过算例实验验证了算法的有效性和方案的优越性,可为堆场实际作业提供决策参考。     

External noise and its interaction with spatial degrees of freedom in nonlinear dissipative systems

A brief introduction to the field is given together with an overview of the lectures given at the workshop on External Noise and its Interaction with Spatial Degrees of Freedom in Nonlinear Dissipative Systems organized by the Center for Nonlinear Studies at Los Alamos, March 28–31, 1988. It is hoped that the publication of papers presented at the workshop in a single issue of theJournal of Statistical Physics will help draw attention to the recent developments in this rapidly area of nonequilibrium phenomena.     

1，3—Diphenyl—5—（9—phenanthry1）—2—pyrazoline（DPPhP）：An Excellent Ho1e—Transport Material for Use in Organic Light—Emitting Diodes

An excellent hole-transport material,1,3-diphenyl-5-(9-phenanthryl)-2-pyrazoline(DPPhP)for OLEDs was studied.This compound not only offers hlgh glass transition temperature(Tg=96℃）,good film forming ability,and high HOMO energy level,but also displays excellent hole-transport property.The electrlumlnescent device with a simple structure of ITO/DPPhP(60nm)/AIQ(60mm)/LiF(0.8nm)/Al shows an external quantom efficiency as high as 1.6?     

Instanton in the Field of a Pointlike Source of a Euclidean Non-Abelian Field

We consider the behavior of an (anti)instanton in the field of a pointlike source of a Euclidean non-Abelian field and investigate (anti)instanton deformations described by variations of its characteristic parameters. We formulate the variational problem of seeking the corresponding “crumpled” topological configurations and solve it algebraically using the Ritz method (of multipole decomposition of deformation fields). We investigate the domain of parameters specific for the instanton liquid model. We propose a simple method of taking contributions of such configurations in the functional integral into account approximately. In the framework of superposition analysis, we obtain an estimate for the mean energy of the source in the instanton liquid, and the estimate increases linearly with distance. In the case of a dipole in the color-singlet state, the energy is a linear function of the distance between the sources with the “strength” coefficient agreeing well with the known model and lattice estimates. __________ Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 146, No. 2, pp. 267–298, February, 2006.     

Scaling Laws for the Multidimensional Burgers Equation with Quadratic External Potential

The reordering of the multidimensional exponential quadratic operator in coordinate-momentum space (see X. Wang, C.H. Oh and L.C. Kwek (1998). J. Phys. A.: Math. Gen. 31:4329–4336) is applied to derive an explicit formulation of the solution to the multidimensional heat equation with quadratic external potential and random initial conditions. The solution to the multidimensional Burgers equation with quadratic external potential under Gaussian strongly dependent scenarios is also obtained via the Hopf-Cole transformation. The limiting distributions of scaling solutions to the multidimensional heat and Burgers equations with quadratic external potential are then obtained under such scenarios. AMS Subject Classifications: 60G60, 60G15, 62M15, 60H15     

有源RLC电路量子化的双波描述

采用正则变换量子化以及规范变换方案,得到有源RLC电路量子化哈密顿算符及其波函数.引入双波函数描述其量子状态,得到了电荷、电流等物理量的时间演化方程.对有源RLC电路给出更完整的描述.