英语中的对偶和对照修辞初探

对偶和对照是两种常见的修辞方式，但在英语和汉语中又不尽相同。在英语里，对偶和对照可由主语、谓语、表语、宾语、介词宾语、状语、定语从句、短语等九种方式构成。恰当地运用对偶和对照，可以增添语气的鲜明性，起到加强语气的作用。     

核医学肝胆显像剂IODIDA的合成研究

为合成肝胆显像剂IODIDA,以活泼芳香胺为原料,经改进的直接碘化法,选择性碘代芳香胺。在吡啶与醋酐存在下,用相应的碘代芳香胺与氮三乙酸反应,可得所需产物,产率较好。     

符号计算与非线性偏微分方程精确行波解

In this paper, with the aid of the symbolic computation, a further extended tanh function method was presented. Based on the new general ansatz, many nonlinear partial differential equation（s）（NPDE（s）） can he solved. Especially, as applications, a compound KdV-mKdV equation and the Broer-Kaup equations are considered successfully, and many solutions including periodic solutions, triangle solutions, and rational solutions are obtained. The method can also be applied to other NPDEs.     

关于中国加快金融工程学学科建设的思考

本文主要概括归纳了金融工程学的内涵和研究对象 ;分析了金融工程与金融创新的关系 ;概括总结了金融工程学未来的发展趋势 ;提出我国加快金融工程学学科建设的必要性和迫切性 ;并指出我国加快金融工程学学科建设所面临的问题和困难等     

部分积累制养老保险模式存在问题分析

养老保障制茺是我国基本经济社会制度的重要组成部分，养老保障制度的建立与完善，将对经济社会发展起到积极的促进作用，反之也有可能成为经济社会发展的桎梏。本文首先对部分积累制养老保险模式进行了财务分析，阐述了该养老保险模式存在的主要问题，并提出了相应的解决对策。     

分段函数求导问题的多种解法

求分段函数在分段点处的导数，不能直接利用求导公式或求导法则；但是可以借助其它数学工具，如导数极限定理、泰勒公式等等，将问题转化，进而得到求解该问题的多种方法。     

Schrdinger方程单内点精细积分法与差分法比较研究

可用单内点子域精细积分法求解Schrdinger方程初值问题。当单内点精细积分中的传递函数即指数函数用Taylor展开式的一阶近似来替代时,精细积分转化为差分方程。文章研究了这一对应关系。各种常见差分格式均找到了对应的单点精细积分格式,并在单点精细积分一般公式中得到了统一表达式。     

Particles in a Box with One Sticky Wall: From ODE to PDE

Abstract

We present noncompetitive adsorption as “particles in a box with one sticky wall.” We start with a general model that can be modeled as a simple ordinary differential equation (ODE). To verify the ODE students run a computer simulation. The ODE’s solution imperfectly fits the simulation’s data. This leads to the diffusion partial differential equation. We show how to determine the diffusion constant from theory; how to determine how many terms in the Fourier series solution need to be summed; and the use of nonlinear regression. As a bonus, the physics of the model will lead us to a series representation of π.     

Reductive cyclodimerization of arylmethylidenemalononitriles promoted by samarium and catalytic amount of iodine:facile synthesis of cyclopentene derivanves

Samarium and a catalytic amount of iodine were used to obtain functionalized cyclopentenes by reductive dimerization followed by intramolecular cyclization of 1,1-dicyanoalkenes under mild conditions.     

Models for Semiordered Data to Address Not Applicable Responses in Scale Measurement

The purpose of this study is to develop and evaluate unidimensional models that can handle semiordered data within scale items (i.e., items with multiple ordered response categories, and one additional nominal response category). We apply the models to scale data with not applicable (NA) responses to compare the model performance to conditions in which NA responses are treated as missing and ignored. We also conduct a small simulation study based on the operational study to evaluate the parameter recovery of the models under the operational conditions. Findings indicate that the proposed models show promise for (a) reducing standard errors of trait estimates for persons who select NA responses, (b) reducing nonresponse bias in trait estimates for persons who select NA responses, and (c) providing substantive information to practitioners about the nature of the relationship between NA selection and the trait of measurement.