基于数码相机图像的三维重构

针对传统三维坐标测量方法的局限性，提出了利用数码相机对物体进行三维重构，达到对物体进行非接触测量的目的．采用标准图像法对数码相机内部和外部参数分别标定，与传统的相机标定相比，简化了求解的复杂性．基于同一物体的两幅图像，给出了其三维重建理论和算法．并举例说明了三维重构的具体实现步骤和方法．     

英语诗的遣词探究

围绕英语诗歌所涉及的一些语言现象进行研究,分别从英语诗歌用词、英语词汇外延与内涵意义、英语诗歌意象创作表达手法、英语诗歌比喻表现形式、英语诗歌象征意义表现手法等五个方面具体对英语诗的遣词作以分析,从而阐释英语诗的语言特征。     

试论英汉谚语中动物比喻形象的文化差异

本文从文化的角度,通过对英汉两种民族不同的生存环境、风俗习惯、宗教信仰及历史典故等方面的粗略比较,来探究英汉谚语中动物比喻形象差异的根源。     

《浮士德》与神秘主义

歌德《浮士德》中的神秘现象及主人公的巫士身份，长期以来并未受到评论界应有的重视。本文试从三个方面对这些现象加以论述：１．巫术的动机：歌德从被视为异端的神秘主义著作及活动和基督教正统观念中接受了关于“巫术”的矛盾界说：前者认为它是超自然的力量，后者认为它是“否定”、“毁灭”的代名词。２．影响的焦虑：这两种界说交叉影响着人物形象和主题，作者对浮士德既爱又厌恶，既肯定又否定。３．欲望与毁灭。伴随着浮士德欲望追求的是一系列的毁灭意象，歌德采用巫术题材的意义正在于对正统、秩序、权威乃至文明的反叛与否定。     

"象同意异"与"象异意同"--试论先秦诗文比兴手法运用的一大特色

取象完全一致,但喻意不尽相同甚至截然不同的"象同意异"现象与取象全然不同,喻意却大致相仿甚至完全一样的"象异意同"现象在先秦诗文中大量存在,成为先秦诗文比兴手法运用的一大特色,文中主要研究探讨形成这一现象的诸多原因、所取得的独特效果以及对后世的深远影响.     

农家女进城的生存转向与城市意象研究

上世纪90年代以降,在文学的农民工进城叙事中,出现了性别向度上农家女进城的生存转向叙事。在空间对峙与文化并置中,她们作为游移的文化活体,在性别化的人与城的隐喻化、模式化、空间化、边缘化的文学构想中,农家女意象荷载着丰厚的文化内涵。基于城乡发展失衡与二元户籍制度的划分,文学的城市呈现出否定意象的文化症候,其历史进步性、文化熔炉的聚合性、生存家园的建构性成为被遮蔽的灰色地带。     

Generalized Mixtures of Gamma and Exponentials and Reliability Properties of the Maximum from Friday and Patil Bivariate Exponential Model

The minimum and maximum order statistics from many of the common bivariate exponential distributions are predominantly generalized mixtures of exponentials; however, the maximum from the Friday and Patil bivariate exponential (FPBVE) model is either a generalized mixture of three or fewer exponentials or a generalized mixture of gamma and exponentials. In this article, we obtain conditions based on the weights and parameters of the generalized mixtures of gamma and one or two exponential distributions that yield legitimate probability models. Furthermore, we analyze properties of the failure rate of the maximum from the FPBVE model. This answers a question raised in Baggs and Nagaraja (1996 Baggs , G. E. , Nagaraja , H. N. ( 1996 ). Reliability properties of order statistics from bivariate exponential distributions . Commun. Statist. Stochastic Mod. 12 : 611 – 631 .[Taylor & Francis Online] , [Google Scholar]).     

An Inverse-Probability-Weighted Approach to the Estimation of Successive Duration Times under Left-Truncation and Right-Censoring

In incident cohort studies, survival data often include subjects who have had an initiate event at recruitment and may potentially experience two successive events (first and second) during the follow-up period. Since the second duration process becomes observable only if the first event has occurred, left-truncation and dependent censoring arise if the two duration times are correlated. To confront the two potential sampling biases, Chang and Tzeng (2006 Chang , S.-H. , Tzeng , S.-J. (2006). Noparametric estimation of sojourn time distributions for truncated serial event data- a weight-adjusted approach. Lifetime Data Anal. 53–67.[Crossref], [PubMed], [Web of Science ®] , [Google Scholar]) provided an inverse-probability-weighted (IPW) approach for estimating the joint probability function of successive duration times. In this note, an alternative IPW approach is proposed. A simulation study is conducted to compare the two IPW approaches.     

Stochastic Aging Classes for the Maximum Statistic from Friday and Patil Bivariate Exponential Distribution Family

Friday and Patil bivariate exponential (FPBVE) distribution family is one of the most flexible bivariate exponential distributions in the literature; among others, it contains the bivariate exponential models due to Freund, Marshall–Olkin, Block–Basu, and Proschan–Sullo as particular cases. In this article, we discuss the stochastic aging of the maximum statistic from FPBVE model in according to the log-concavity of its density function, i.e., in the increasing or decreasing likelihood ratio classes (ILR or DLR), and consequently in the IFR and DFR classes. Furthermore, a kind of DFR distributions which are not DLR is derived from our classification.     

Mixture of Bivariate Exponential Distributions

The exponential distribution is one of the most used type of distribution because of its importance in many lifetime applications and its properties. So is its bivariate form. Simply used, there can be limitations specially for the heterogeneous type population. Its mixture form adds a lot of characters and desirable properties. We propose a mixture of bivariate exponential distribution, study properties of the associated parameters and predict the elements of the mixture. We include the presence of covariate information through a linear relationship, capturing the now famous idea by Marshall and Olkin.