画有法画无定法--浅议写实摄影构图的六个基本法则

在摄影过程中应遵循和运用黄金分割、三角形、对角线、天头留白、运动空白、均衡稳定等构图法则,方能使写实摄影作品获得较为理想的艺术效果.     

浅谈中国古典园林建筑的美学思想

中国古典园林中的建筑是园林中的重要组成部分,亭、廊、桥、榭、舫等主要构筑物无不具备各自的美学特征,形成了丰富的美的景观,其美学价值、哲理内涵极具研究价值.中国古典园林中的建筑主要表现了飞动之美、空间之美和诗情画意之美等主要美学特征.     

一种基于UMHexagonS的运动估计优化算法

UMHexagonS算法是H.264/AVC所采纳的整像素的快速运动估计算法之一,该算法在保持良好的率失真性能的前提下,相比全搜索算法(FS)可节约70%的运算量。根据UMHexagonS算法的特点,可从三个方面对该算法进行优化:加入零运动块判决;改进的5*5螺旋搜索;优化的多层次六边形搜索。仿真实验结果表明,在保证PSNR和码率几乎不变的情况下,优化算法可有效降低运动估计时间,从而提高H.264/AVC编码器的实时性。     

分数布朗运动下带违约风险的可转换债券定价

应用均衡定价方法,考虑股票价格和公司资产价值服从分数布朗运动以及存在公司违约风险情况下的可转债定价问题;建立相应的可转债定价模型,采用拟鞅定价方法,得出了欧式看涨期权的显式解,进而得出了可转债定价公式;最后利用数值算例进行分析,结论表明公司违约风险、股票价格和公司资产价格的长程关联性是可转债定价时不可忽略的因素。     

A Non‐Parametric Estimator of the Spectral Density of a Continuous‐Time Gaussian Process Observed at Random Times

Abstract. In numerous applications data are observed at random times and an estimated graph of the spectral density may be relevant for characterizing and explaining phenomena. By using a wavelet analysis, one derives a non‐parametric estimator of the spectral density of a Gaussian process with stationary increments (or a stationary Gaussian process) from the observation of one path at random discrete times. For every positive frequency, this estimator is proved to satisfy a central limit theorem with a convergence rate depending on the roughness of the process and the moment of random durations between successive observations. In the case of stationary Gaussian processes, one can compare this estimator with estimators based on the empirical periodogram. Both estimators reach the same optimal rate of convergence, but the estimator based on wavelet analysis converges for a different class of random times. Simulation examples and an application to biological data are also provided.     

Ruin problem of a two-dimensional fractional Brownian motion risk process

This paper investigates ruin probability and ruin time of a two-dimensional fractional Brownian motion risk process. The net loss process of an insurance company is modeled by a fractional Brownian motion. The two-dimensional fractional Brownian motion risk process models the surplus processes of an insurance and a reinsurance company, where the net loss is divided between them in some specified proportions. The ruin problem considered is that of the two-dimensional risk process first entering the negative quadrant, that is, the simultaneous ruin problem. We derive both asymptotics of the ruin probability and approximations of the scaled conditional ruin time as the initial capital tends to infinity.     

运动事件的翻译:语义特征的保留与转换研究——以《红楼梦》诗词英译为例

基于Talmy 的运动事件框架和词汇化模式研究,以杨宪益、戴乃迭和霍克斯的《红楼梦》诗词的译文为例,以方式、结果、路径和物像等特征为着眼点,探讨运动事件翻译过程中的语义特征保留与转换。研究发现,译者采用了不同的原文解析方式,以动词为中心重组译文,突显不同的语义特征,从而使译文的运动事件特征呈现不同的保留度与转换度。     

从乔治·斯坦纳的阐释学翻译观看译者主体性——以许渊冲唐诗英译为例

在简要介绍阐释学理论的基础上,以阐释学的代表人物斯坦纳的翻译四步骤理论为指导,以许渊冲的唐诗英译为研究对象,将译者主体性这一抽象概念分解到斯坦纳的“信任”、“侵入”、“输入”和“补偿”四个具体翻译步骤中,以期证实在唐诗的英译过程中,翻译家许渊冲的主体性作用在这四个具体步骤中的充分体现,为进一步确立译者的主体地位和作用提供理论依据。