冒泡排序算法的改进

本文作者对传统的冒泡排序算法进行了时间复杂性分析，指出其效率不高的缺陷，提出了双向同时浮沉的改进方法，并编程予以实现。其效率较传统的冒泡排序算法有一定程度的提高．     

山西省入境旅游市场竞争态及转移分析

山西是全国旅游资源大省之一，拥有众多品位极高的旅游资源，但强大的资源优势并没有很好的转化为经济优势，这些年入境旅游业绩一直位居全国中下游．为了尽快改变这种状况，使山西入境旅游业得以加速发展，分析研究其市场状况就是很有必要的了．本文借助市场竞争态模型对2000年～2002年和2003年～2005年山西省入境旅游客源市场的竞争态势进行对比分析，并对山西省入境旅游市场竞争态进行动态分析．在分析的基础上，提出了拓展山西入境旅游市场的几点建议．     

对大学新生英语课程实施任务教学法中情感因素的调查与发现

本文对大学新生在任务教学法英语课程实施过程中的情感因素进行调查,特别关注诸如焦虑、抑制、自尊、学习动机和移情这几方面的情感因素的表现形式与程度,并探讨教师和学生对此该采取的措施。     

关于C++中继承方式问题的研究

针对C＋＋语言中继承方式及访问权限的理解极易混淆的问题，详细讨论了对C＋＋语言中的继承方式及成员访问权限的教学，并给出具体的继承访问控制的例子。     

英汉词汇搭配现象的异同比较

语言中能够独立运用的最小表义单位是词,因为词是“语言的最小的独立运用的意义单位”。对词汇搭配的研究是研究词的一个基本的重要内容,汉语和英语两种语言搭配有各自的特点,同时,二者也有共同之处。通过研究汉英词汇搭配中的某些现象,比较二者的相似与不同之处,旨在揭示英汉两种语言在语法规律以及语义范围等方面的特殊规律,对英语教学和翻译研究有一定的指导意义。     

Photochemistry of trifluromethyl substituted 1‐methylpyrazoles

Trifluromethyl substitution on the pyrazole ring was found to enhance photoreactivity via the P₄ pathway which involves interchange of the N2‐C3 ring atoms. Thus, 1‐methyl‐3‐(trifluromethyl)pyrazole (1) and 1‐methyl‐5‐(trifluromethyl)pyrazole (3) transposed with a P₄/P₆ or P₄/P₆+P₇ ratio of 2.1:1. 1‐methyl‐4‐(trifluromethyl)pyrazole (2) transposed regiospecifically by the P₄ transposition pathway. Compounds 2 and 3 were also observed to undergo photocleavage to yield enaminonitrile and enaminoisocyanide products.     

Time-resolved chemiluminescence technique for the microdetermination of proteins based on their complexation with copper(II).

Based on the complexation between proteins and Cu(II) coupled with the time-resolved chemiluminescence (CL) technique, a highly sensitive and quantitative assay for measuring proteins in solution is described. The complexes of proteins with Cu(II) have a strongly catalytic effect on the luminol-H2O2 CL reaction. Because the CL emission produced by the complexes is much more long-lived than that by Cu(II), the CL signals originating from proteins can be easily identified and measured with a time-resolved technique. On this basis, bovine albumin fraction V (BAF V) can be quantitatively determined in the range of 0.01 - 5.0 microg/ml with a detection limit of 5.8 ng/ml. The results show that the proposed assay exhibits a small variation in the response values for the same amount of different proteins, as compared to the Lowry as well as Bradford assays. The CL assay has also been studied for the detection of immobilized proteins.     

Luttinger liquid with asymmetric dispersion

We present an extension of the Tomonaga-Luttinger model in which left and right-moving particles have different Fermi velocities. We derive expressions for one-particle Green's functions, momentum-distributions, density of states, charge compressibility and conductivity as functions of both the velocity difference ε and the strength of the interaction β. This allows us to identify a novel restricted region in the parameter space in which the system keeps the main features of a Luttinger liquid but with an unusual behavior of the density of states and the static charge compressibility κ. In particular κ diverges on the boundary of the restricted region, indicating the occurrence of a phase transition. Received 20 May 2002 / Received in final form 23 August 2002 Published online 19 November 2002     

Some results on fractionaln-factor-critical graphs

A simple graphG is said to be fractionaln-factor-critical if after deleting anyn vertices the remaining subgraph still has a fractional perfect matching. For fractionaln-factor-criticality, in this paper, one necessary and sufficient condition, and three sufficient conditions related to maximum matching, complete closure are given.     

用多焦点全息透镜实现多重谱分数傅里叶变换

提出用多焦点全息透镜实现多重谱分数傅里叶变换.利用全息方法通过一次曝光制作出多焦点的全息透镜,分析了用此全息元件实现这种变换的条件,并在实验上实现了多重谱分数傅里叶变换. 实验结果表明这种变换方法简便可行,可广泛应用于多通道光学信息处理系统及多目标图像识别系统中.