数学形态学方法在舌象分割中的应用

文章针对在舌图像预处理中阈值分离方法解决舌体分割问题的不足,提出了利用数学形态学法来进行二次处理的新方法,详细阐述了阈值分离方法分割舌体的过程,用数学形态学方法二次处理的原理、实现和实验结果。我们将数学形态学方法应用于舌图像中舌体分割,克服了阈值分离方法的缺陷,取了满意的效果。     

结合植被指数与作物高度反演冬小麦叶面积指数

[目的]叶面积指数LAI(Leaf Area Index)是反映作物长势的关键参数之一。目前,基于无人机影像进行LAI反演多注重影像光谱信息的应用,但是由于高分影像存在强烈的光谱异质性以及无法区分高密闭度植被垂直方向枝叶的光谱特征等不足,在反演作物LAI时,需要探讨作物高度等结构参数对LAI反演的影响。[方法]文章以冬小麦为例,将无人机影像的光谱信息与点云数据相结合,共同构建LAI反演模型,并与单利用光谱信息的一元线性LAI回归模型进行对比,探讨作物高度信息对LAI反演精度的影响。[结果](1)无人机影像获取的点云数据能有效反演作物高度,其决定系数R~2=0.61,均方根误差RMSE=0.02;(2)基于作物高度和植被指数Ⅵ(Vegetation Index)反演LAI的二元模型(Adjust R~2=0.38,Adjust RMSE=0.55)优于单用植被指数反演LAI的一元模型(Adjust R~2=0.29,Adjust RMSE=0.59),[结论]研究表明作物高度和光谱信息结合的反演模型能够提高作物LAI的反演精度,同时表明作物高度因子在LAI反演中具有重要的应用价值。     

Science,technology and engineering: Building lifelong bridges

In response to what is envisaged as a crisis in scientific and technological literacy, various organizations and governmental agencies have put forward recommendations for enriching students' science and technology experiences in formal and informal learning environments. This paper examines one such organization — the Professional Engineers Ontario — and their Innovators in the School initiative. Through this student outreach programme, engineers, scientists and technologists volunteer their time to visit elementary and secondary level students, encouraging them to pursue science, technology and engineering careers. In particular, this research identifies issues that the Innovators (interestingly, over half are women) consider to be important for promoting a positive image of science to young people. First, the paper considers what an image of science might potentially be. Second, it addresses the question of how Innovators and other educators (teachers, policy-makers, curriculum planning teams) might promote this positive image in the classroom and school.     

基于效用函数的航材保障效能评估

详细分析了航材保障效能评估的指标体系.针对影响航材保障效能的指标特点,将效用函数用于航材保障效能评估,并结合德尔菲法,建立了航材保障效能评估的数学模型,该模型能客观科学的评估航材保障效能.最后用航材保障运送能力评估的实例,验证了模型的有效性.     

大比例尺航测数字化成图方法研究

对万庄镇进行大比例尺调绘成图,为区域土地的集约化利用和经济社会可持续发展提供科学依据。     

Destination images,holistic images and personal normative beliefs: Predictors of intention to revisit a destination

This research examines the complex relationship between destination image components and behavioral intentions, incorporating two pivotal but unexplored in related literature constructs, namely holistic image and personal normative beliefs (PNBs). Previous studies incorporating destination images as predictors of intention to revisit have mostly investigated their direct effect. This research integrates holistic image as a mediator and PNBs as a moderator. The findings verify the mediating role of holistic image for predicting tourists' intention to revisit a destination, supporting a partial and a full mediation. Interestingly, only affective and conative images contribute to the prediction of tourists' intention to revisit a destination through the holistic image towards this destination. Moreover, PNBs moderate the effect that conative destination images have on tourists' holistic image. Practically, the research highlights factors that affect tourists' tendency to select a tourism destination, which can serve as a basis for tailoring the effective positioning of destinations.     

Relationships Between Viewing Preference and Outdoor Scenic Components Among Ethnically Diversified Viewers

Abstract

Visual preference is determined by what we see. This study shows the associative strength between visual preference and selected components of outdoor type scenes. Viewers were asked to assess the relative magnitude of what they saw when looking at 35 mm color slides depicting outdoor scenes. Correlation analysis was used to develop the association between the degree of viewer preference and the degree to which each scenic component was perceived. Analyses were also done for viewer groups by gender, age, ethnicity, community type, terrain type, education level, and professional expertise. Factor analysis revealed that twelve of the original eighteen components could be reduced to four, indicating that they are likely to be synonyms and may be measuring the same thing. The memories variable was consistently associated with viewing preference throughout all scenes and viewer types. Color brightness and color variety were also consistently correlated with viewing preference.     

A Snapshot into the Past: The Utility of Volunteer-Employed Photography in Planning and Managing Heritage Tourism

Visual imagery is a critical constituent in the production and consumption of heritage tourism; yet researchers have been relatively slow to capitalise on the potential of visual data analysis techniques to assist its effective planning and management. While there is some research that uses industry generated images found in holiday brochures and on postcards, few studies have made use of photographic data that has been collected by tourists themselves in a self-directed manner. This technique, generally known as volunteer-employed photography (VEP), can be seen to hold a number of potential advantages over more traditional methods of visual data analysis; yet at the same time there are a number of potential drawbacks with the approach. This paper reviews the VEP technique and sets out its major strengths and potential weaknesses. A case study of resident and tourist perceptions of the image of a Welsh seaside town is then presented in order to illustrate the potential for VEP in the planning and management of tourism in the built-historic environment. The paper then presents some suggestions for potential applications of the technique in the planning and management of heritage tourism.     

浅析电视解说词与画面的和谐统一

电视解说词是为画面服务的,其作用主要依附于画面,而且解说词具有非独立性,所以在创作解说词的过程当中应讲求电视解说词与画面的和谐统一。     

从《功夫熊猫》看美国电影中中国形象的转变

好莱坞电影从根本上来说,仍然是美国商业化文化的产物,是美国和西方主流意识形态的最重要媒介。在不同时期,中国,印度,非洲和中东都起过陪衬西方的作用,或者是作为理想化的乌托邦,诱人和充满异国风味的梦境,或者作为永远停滞,精神上盲目无知的国土。然而,2008年6月,美国梦工厂与派拉蒙合作推出了中国味十足的《功夫熊猫》,获得了极大的成功,实现了中国形象的极大转变。