Segmentation of complex objects’ sonar images using parameter-fixed MRF model

1 Introduction1 Imaging sonar has been widely used in the case of mine finding, underwater seeking and sound vision system of AUV as an important method. Therefore the object recognition based on sonar image, especially complex object, is one of the impor…     

高职英专学生写作句法层的汉语负迁移

语言迁移理论兴起于上世纪50年代。已有的研究表明，汉语和英语是区别很大的两种语言，中国学生在英语写作中普遍受到汉语负迁移的影响。本文以高职院校英语专业大三即将参加毕业实习的学生为对象，通过实证研究，探讨了写作中汉语句法层的负迁移。并通过分组分析，探讨了不同层次的学生受汉语负迁移的影响程度。     

基于MVB总线的DMI与车载设备通信方法

在CTCS-2级列控系统中,需要为DMI和车载设备之间传输数据提供一种及时、安全、高效的方法.首先介绍了基于MVB总线的DMI与车载设备的通信方法,包括周期数据传输方法和非周期数据传输方法;其次介绍了非周期数据传输协议的基本原理,发送数据状态机和接收数据状态机的设计方法;最后对DMI与车载设备传输数据方法的实时性、正确性和可用性进行了分析.     

A latent segmentation based multiple discrete continuous extreme value model

We examine an alternative method to incorporate potential presence of population heterogeneity within the Multiple Discrete Continuous Extreme Value (MDCEV) model structure. Towards this end, an endogenous segmentation approach is proposed that allocates decision makers probabilistically to various segments as a function of exogenous variables. Within each endogenously determined segment, a segment specific MDCEV model is estimated. This approach provides insights on the various population segments present while evaluating distinct choice regimes for each of these segments. The segmentation approach addresses two concerns: (1) ensures that the parameters are estimated employing the full sample for each segment while using all the population records for model estimation, and (2) provides valuable insights on how the exogenous variables affect segmentation. An Expectation–Maximization algorithm is proposed to address the challenges of estimating the resulting endogenous segmentation based econometric model. A prediction procedure to employ the estimated latent MDCEV models for forecasting is also developed. The proposed model is estimated using data from 2009 National Household Travel Survey (NHTS) for the New York region. The results of the model estimates and prediction exercises illustrate the benefits of employing an endogenous segmentation based MDCEV model. The challenges associated with the estimation of latent MDCEV models are also documented.     

Market power and its determinants in the Chinese airline industry

This paper first measures the degree of Chinese airlines’ market power by using Lerner index, and then investigates its determinants. Our empirical results show that a certain degree of market power exists in the Chinese airline industry. Of the three dominant carriers, Air China exhibits the strongest market power whereas China Eastern Airlines the weakest, with China Southern Airlines being in the middle. Furthermore, the extent of market power varies significantly among regional markets, with China’s northeast region as the strongest, followed by the eastern and western regions, and the central area as the weakest. We also find a hub-premium effect similar to the result found in the US airline market. Our analysis shows that the existence of high-speed rail and low-cost carriers, income level, population size, seasonality, and number of competing airlines are the main determinants of competition in the Chinese airline market.     

中国梦与当代中国意识形态的历时生成与共时交融

中国梦与当代中国意识形态既具有生成的历时同构性,又具有共时交融性。在实现以两个百年奋斗目标为典型特征的中国梦的关键时期,当代中国意识形态的创新发展关系实现中国梦的总体方向与推进路径,中国梦的本质内涵为当代中国意识形态的传承与创新提供了大众化话语体系。     

论山东半岛在中国古代航运史上的地位

山东半岛自古以来为我国航运的发展作出巨大贡献，在中国古代航海史中更起到了至关重要的作用，无论是先秦时期作为我国最早成型航运中心区域，还是后发展成为对朝鲜日本文化贸易的门户，再到对于古代中国内河漕运的影响，山东半岛在我国古代航运史中的地位不可忽视．     

英语单词的理据初探

英语不是简单的象形拟音文字,而是更高级的象意文字。本文试图通过对本源七词的"说文解字",来阐述这一理论。最后,从典型解说中,得到推论一:英语单词是由52个字母组成;推论二:构形英语单词的词素常会出现许多变化义。     

清代中西文化互动及其终结初探

在清代,中国化出现了一次明显的转向,一方面是中国化研究力求改变宋明以来,崇尚空谈的学术风气,力图重建社会与思想秩序;另一方面则是中西明之间所发生的大规模的相遇和互动,这种互动最后以失败而告终。本旨在证明：异质化间的有益互动只能建立在彼此深入理解、以平等身份参与的基础之上,各种化形态都应当历史地反思自身在人类明发展史中的态度选择。     

"奇":中国古代小说中的重要概念

历代中国小说理论从很多方面探讨小说的审美特征 ,但是忽略了小说带有根本性特征的审美特点 :“奇”。本文试图寻找中国古代小说理论史中对“奇”的使用和论述 ,尝试着对“奇”定义 ,并探讨中国古代小说的根本审美特征。