Nonlinear instabilities in photochemical oxidations of 1,4-cyclohexanedione and its derivatives.

In the closed 1,4-cyclohexanedione(CHD) bromate oscillatory reaction, we discovered that stirring can induce transitions between simple and period-doubled oscillations. When illumination was employed to characterize the importance of micro fluctuations of concentrations, the threshold stirring rate for inducing a bifurcation was found to increase proportionally to the intensity of the applied light. Numerical simulations with an existing model illustrate that the experimental phenomena could be qualitatively reproduced by considering effects of mixing on diffusion-limited radical reactions, namely, the disproportion reaction of hydroquinone radicals. A novel light-mediated chemical oscillator, i.e. 1,4-benzoquione(Q-bromate oscillator, was uncovered and investigated systematically in a batch reactor. Dependence of the oscillatory dynamics on the intensity of illumination was characterized. Quenching experiments suggest that the bromate - 1,4-Q oscillator is not only Br- controlled, but also radical-controlled. Oscillations were also investigated in a CSTR system. A mechanism was proposed, which successfully reproduced the experimental phenomena.Dept. of Chemistry and Biochemistry. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2006 .Z44. Source: Masters Abstracts International, Volume: 45-01, page: 0330. Thesis (M.Sc.)--University of Windsor (Canada), 2006

On C-E Translation of Campus Public Signs: from the Perspective of Functionalist Translation Theory

A public sign is a vocative text. The most important criterion for the translation of public sign is the realization of functionality. At present, there are many poorly-translated public signs on university campus, the reason for which lies in the over-emphasis on form as well as the neglect of the communicative purpose and effect. The C-E translation of public signs should realize the communicative function, and convey the illocutionary and perlocutionary meaning of the source-language text. Key words: functionalist translation theory, public sign, function, purpose Résumé: Le terme d’affiche est un texte doté de la fonction d’appel. Le critère clé de la traduction du terme d’affiche est que le texte de traduction résalise la fonction prévue. Actuellement, il existe un grand problème de qualité dans la traduction du terme d’affiche dans des universités, et la raison principale réside dans ce que le traducteur, recherchant partiellement la correspondance de forme du texte, néglige le but et l’effet de communication. La traduction des affiches doivent représenter la fonctoin communicative du texte original et fait grand cas de la signification profonde et de sa communication. Mots-clés: théorie de la traduction fonctionnelle, terme d’affiche, fonction, but 摘要：公示語是具有呼喚功能的文本。公示語翻譯的最重要標準是使譯文實現預期功能。目前一些高校的公示語翻譯存在嚴重的品質問題，主要原因在於譯者片面追求文本的形式對應而忽視了交流的目的與效果。公示語翻譯應體現源語文本的交際功能，注重原文本的言外之意和言外效果的傳達。關鍵詞：功能翻譯理論；公示語；功能；目

An improved BRDF method for 3D textile simulation

There are some methods suggested by researchers were used to simulate one or two characteristics of textile in the past few years. With 3D geometry models, most of these methods are somewhat complex, and it is difficult to simulate fabric attributes. This paper represents a method for textile simulation based on improved BRDF illumination models. As one simple type of BRDF model, Phong illumination model can be used to simulate fabric 3D geometry model. The more complex BRDF illumination model may be used to simulate fabric 3D structure. The pixel color values, derived from simulating fabric 3D structure, is taken as the parameters to be entered into Phong illumination model. And thus both the fabric 3D geometry model and structure can be achieved, based on which the textile can be simulated successfully and obtain a perfect display effect

The Impact of Time Delay in a Tumor Model

We consider a free boundary tumor growth model with a time delay in cell proliferation and study how time delay affects the stability and the size of the tumor. The model consists of a coupled system of an elliptic equation, a parabolic equation and an ordinary differential equation to describe the cell location under the presence of time delay, with the tumor boundary as a free boundary. A parameter $\mu$ in the model is proportional to the “aggressiveness” of the tumor. It is proved that there exists a unique classical radially symmetric stationary solution $(\sigma_*,p_*,R_*)$ which is stable for any $\mu\u3e0$ with respect to all radially symmetric perturbations [S. Xu, Q. Zhou, and M. Bai, Qualitative analysis of a time-delayed free boundary problem for tumor growth under the action of external inhibitors]. However, under non-radially symmetric perturbations, we prove that there exists a critical number $\mu_*$ such that if $\mu\mu_*$ then the stationary solution is unstable. It is actually unrealistic to expect the problem to be stable for large tumor aggressiveness parameter, therefore our result is more reasonable. Furthermore, it is also proved by the authors that adding the time delay in the model would result in a larger tumor, and if $\mu$ is larger, then the time delay would have a greater impact on the size of the tumor