城镇生态系统的因子分析

本文从自然、经济、社会和环境四方面构建了城镇生态系统的指标体系 ,提出了评价生态化程度的因子分析方法 ,并对张家港市城镇生态化程度进行了分析     

城市主干道交通信号灯模糊线控制的探讨

本文首先提出城市交通系统线控制的两级递阶结构：第一级，用模糊逻辑控制器确定单路口交通信号灯的周期和绿信比；第二级，用模糊相位控制器确定相邻两路口的相位差；两级间用模糊转换开关协调；然后，提出具体的实现方法。     

Isoentropic and Isoenthalpic Temperatures of Protein Unfolding in Hydrophobic Interaction Chromatography

Hydrophobic interaction chromatography (HIC) is widely used for the separation and purification of biopolymers in their native state, and now also becomes a new method to refold the denatured proteins1. The effect of salt or water concentration2 on the pr…     

Upper bound on the occupation time in the simple exclusion process

We consider the occupation time variance in the asymmetric exclusion process. In the case where the mean m ≠ 0 (m is the mean hopping rate) and ρ = 1/2 (ρ is the filling probability for a state), we find that the variance is bounded above by O(t ^3/2 ). __________ Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 156, No. 1, pp. 147–158, July, 2008.     

关于“Programming with Semilocally Convex Function”(英文)

“ＰｒｏｇｒａｍｍｉｎｇｗｉｔｈＳｅｍｉｌｏｃａｌｙＣｏｎｖｅｘＦｕｎｃｔｉｏｎ”［１］一文对定义在局部星形集上的局部凸函数给出了二择一定理，并应用到约束最小化问题，得到了优化条件和共轭定理，本文用具体反例说明这些结果是错误的．     

On the isoperimetric deficit of a simplex and of a polygon

This paper gives inequalities which estimate the isoperimetric deficit of a simplex and of a polygon and some consequences thereof.     

Digital phase shift holographic interferometry and its application in the experimental flow study

The application of digital phase shift holographic interferometry to flow-visualization and flow temperature measurement of a 2D thermal flow field was experimentally investigated. An improved recording system for two reference beam phase shift holographic interferometry is set up for this experiment, and details of this experimental technique are described. The phase distribution obtained by this technique presents an excellent picture of flow visualization. From this phase image, temperature distribution of the 2D thermal flow field is also calculated and compared with some measured values obtained using thermocouple probes.     

NMR relaxation and micro-imaging study of polystyrene in concentrated cyclohexane solution

¹³C-relaxation times of polystyrene (PS) in its θ solvent, cyclohexane, are measured at different temperatures. A two-step model for the dissolution is proposed. Swelling of the polymer below the θ temperature is eventually the dispersion of the side group phenyl rings only. While above the θ temperature, complete dissolution is the dispersion of the main chain at a molecular level. The results of T₁(C) are confirmed by¹H-NMR imaging. NMR and its imaging are powerful twls to study the dynamic behavior of dissolution process of polymers in their θ solvents. Project supported by the National Key Projects for Fundamental Research “Macromolecular condensed state”, the State Science and Technology Commission of China.     

关于随机狄里克莱级数所代表的随机整函数的增长性

Let (Ω,A,P) be a probability spasce. Consider a random Dirichlet series.