分析化学简明手册

(ISBN978-7-122-07476-8)该书对常用分析方法的基本原理、仪器设备、工作条件和应用领域进行了全面系统的介绍,包括化学基础知识、定性分析、重量分析、滴定分析、电化学分析方法、分子光谱分析、原子光谱分析、X射线光谱分析、色谱法、其他谱学分析方法     

气相色谱-质谱法结合智能调香辅助软件对未知香精定性及香味分析

本文采用气相色谱-质谱(GC-MS)和"烟用香精成分剖析及计算机智能调香系统软件"相结合的方法,对成分未知的香精X-2进行成分剖析,然后进行香味香韵分析,最终确定了香精的主要成分和主体香韵组成,共鉴别出23种单体原料、3种浸膏,香精的主体香韵为坚果香韵、膏香韵、甜香韵和花香韵,与调香师的品香结果一致,为今后仿香和创香提供了理论依据。     

A qualitative approach to aberrations of optical elements

A qualitative method to analyze wavefront aberrations is presented.Aberrations of the primary type,expressed in their matrix forms,are used to write the generalized ray transfer matrix of an optical component.The aberrations were treated collectively by examining the pseudospectra of an augmented matrix constructed from the aberration matrices.Results show that aberrations can be distinguished and relative strengths pronounced using this qualitative method.     

Modulational instability of optically induced nematicon propagation

We report the modulational instability （MI） analysis for the modulation equations governing the propagation of coherent polarized light through a nematic liquid crystal （NLC） slab, in the limit of low light intensity and local material response. The linear stability analysis of the nonlinear plane wave solutions is performed by considering both the wave vectors （k,l） of the basic states and wave vectors （K,L） of the perturbations as free parameters. We compute the MI gain, and the MI gain peak is reduced and the stable bandwidth is widened with the increase of the strength of the applied electric field. Further, we invoke the extended homogeneous balance method and Exp-function method aided with symbolic computation and obtain a series of periodic solitonic humps of nematicon profiles admitting the propagation of laser light in the NLC medium.     

一类种群动力学传染病模型的定性分析

本文对一类种群动力学传染病模型，运用定性分析方法，分析了奇点和拓扑结构，论证了正平衡点是全局稳定的，并得出该系统不存在极限环的结论，为研究该传染病的发生、流行、传播机制，及控制消灭该传染病提供了充分的理论依据。     

Three-Dimensional Linear Instability Analysis of Thermocapillary Return Flow on a Porous Plane

A three-dimensional linear instability analysis of thermocapillary convection in a fluid-porous double layer system, imposed by a horizontal temperature gradient, is performed. The basic motion of fluid is the surface-tension-driven return flow, and the movement of fluid in the porous layer is governed by Darcy＇s law. The slippery effect of velocity at the fluid-porous interface has been taken into account, and the influence of this velocity slippage on the instability characteristic of the system is emphasized. The new behavior of the thermocapillary convection instability has been found and discussed through the figures of the spectrum.     

A STABILITY ANALYSIS OF THE （k） JACOBI MATRIX INVERSE EIGENVALUE PROBLEM

In this paper we will analyze the perturbation quality for a new algorithm of the (k) Jacobi matrix inverse eigenvalue problem.     

红外光谱在烟酸系列化合物制备过程中的应用

在烟酸系列化合物的合成过程中应用红外光谱的对比定性分析 ,监测整个反应的过程进行 ,以指导合成的进行。     

动态图形运动变化规律的定性和定量分析

定性分析主要是凭直觉、经验和被分析对象的信息资料,对研究对象的性质、特点和变化规律作出判断．定量分析是依据已知信息,通过计算和逻辑推理,分析对象的性质、特点和变化规律．定性分析与定量分析是相互补充的,定性分析常依据感知迅速地对问题作出判断,思维具有简约性,它是定量分析的前提,没有定性的定量是盲目的、毫无价值的．而定量分析使定性更科学、准确,它可以促使定性分析得出严谨和正确的结论．     

环形液层内热毛细对流的线性稳定性分析

为了了解液层深度对热毛细对流不稳定性的影响,利用线性稳定性理论分析了内径为20 mm、外径为40 mm、深度为1～20 mm的环形液层内硅油(Pr=6.7)的热毛细对流,重点考察了发生热流体波的临界温差及热流体波的临界周向波数,结果表明,临界温差随液层深度的增加而降低.讨论了浮力对热流体波及其临界条件的影响,并证实了常重力条件下当液层厚度大于5 mm时,热流体波呈静止状态这一现象.