特性

Density functional theory has been successfully used to predict the kinetic properties and electronic structure of coumarin and spectral characteristics, and it can effectively reduce the blindness and unnecessary waste in synthesis and application of coumarin.

密度泛函理论已成功用于预测反应动力学特性和香豆素的电子结构和光谱特性，可以有效地减少香豆素合成和应用中的盲目性和不必要的浪费。

For example, to counter the disadvantage of apprising the dynamic characteristics of valve train with the maximum negative acceleration which is not enough be observed directly and not enough correct, a method of observing directly the valve trains bounce has been also put forward in this paper.

也就是在理论研究手段基本完备的情况下，利用模型直接观察机构的飞脱现象。并且以6110柴油机配气机构为例，考察了机构中最容易反映飞脱特性的推杆力随结构参数、凸轮型线和凸轮转速的变化规律，为研究配气机构飞脱特性提供了直观有效的方法。

The mean and turbulence characteristics of velocity fields of turbulent round jets at different velocity ratios in counterflow and coflow ambient are investigated thoroughly.

全面研究了不同射流流速比下反向流动和同向流动环境水体中紊动圆射流流速场的时均特性和紊动特性，分析了流速比对射流特征参数的影响。

With the counterflow diffusion flame serving as an object of investigation and by the use of a detailed elementary reaction kinetics model based numerical analysis method a study was conducted of the influence of thermal radiation on the flame structure and NO x formation in a methane/oxygen enriched (oxygen concentration 60%) air diffusion flame.

在富氧燃烧的研究方面，国内已有一些利用富氧燃烧节能降耗的应用性报道，但是，对富氧燃烧的火焰特性以及污染物的排放等方面的基础特性研究还比较少。

The authors analyze and calculate the contamination accumulation characteristics and creepage distance utilization coefficients of several kinds of insulators commonly used in East China Power Grid.

绝缘子的积污特性和爬距有效利用系数对线路的外绝缘特性有重要的影响，这一点应在外绝缘配置时予以考虑。

The result shows that the fuzzy PID control designed systemresponses quickly and does not produce the overshoot basically, it also improves the speed following and anti-interference performance of crosscut machine, can satisfy the control systemrequirement.

仿真结果表明：采用模糊PID控制构成的系统响应速度快，基本无超调，有较好的速度跟随特性和抗干扰特性，能满足横切机控制要求。

Software modularization is implemented by use-case driven approach, and crosscutting concern is encapsulated by aspect-oriented technique. In this paper, we propose a conflict resolution method, which is based on extension of UML.

通过分析面向方面模块的动态特性在编织过程中可能产生的冲突，提出了一种扩展UML的面向方面模块动态特性编织时的冲突解决方法。

The paper discusses the grain compressibility,crushability,shearing and strength characteristics of coral sand and points out that it has the characteristics of high porosity ratio,high friction angle and low strength.

特殊的物质组成、结构和发育环境导致珊瑚砂具有独特的工程性质。文章综述了珊瑚砂的压缩性、破碎性、剪切特性和强度特性，指出了其显著的土力学特点：高孔隙比、高摩擦角和低强度值。

The thesis can be divided into five parts as follows: First, the structural characteristics of finned-pipe evaporator are analyzed. After selecting suitable microelement controller, the heat-transfer and mass-transfer processes are analyzed for every microelement under the conditions of dryness, wetness and frostiness. Based on previous equations, some parameters of frostiness are confirmed and the frost-growing model is set up under frost condition. Some hypotheses are postulated and with the help of the equation of mass-conservation, energy-conservation and momentum-conservation, the evaporation model which fits in the dynamic simulation is built, which set a solid foundation for system simulation. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. Third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet-parameter on evaporator. Fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio-parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping.

本文的主要内容如下：1对翅片管蒸发器结构特点进行分析，选取适当的微元控制体，就干、湿和霜工况下对每个微元分别进行传热传质分析，基于经验关系式确定霜的有关参数，对于霜工况下的霜生长建立模型，经适当假设，运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型，为系统仿真奠定基础； 2对蒸发在大扰动下的开、停机过程，运用动态集中参数模型进行分析和计算，为更好地描述制冷系统运行的全过程奠定基础，同时也为制冷系统实现自动控制提供一定的理论基础； 3对蒸发器正常运行过程，运用动态分布参数和参数间定量耦合的观点来分析和计算，为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性； 4编写翅片管蒸发器动态特性仿真计算程序，可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场，实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。

From the analysis of the simulation, it is concluded that the change of band gap is only related to the fill factor not to the crystal lattice constant.

三角晶格的这种光子晶体的带隙特性最好，并对空气孔之间产生交叠情况下的带隙特性进行了分析说明。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。