流域管理学研究重点的思考

区域地理学是研究某一地区内人地相互作用的科学，流域管理学是以流域为研究对象的一门管理科学。流域管理学是区域地理学研究的前沿性学科，是21世纪要重点发展的学科．流域管理学应研究的关键科学问题主要包括流域健康评价及指标体系的研究、流域水文管理模拟、洪灾管理模拟生态恢复工程效益模型及可持续发展研究、数字流域研究及流域社会经济可持续管理研究．     

基于BP神经网络的图像感兴趣区自动检测技术

图像中感兴趣区(region of interesting,ROI)的自动分割是图像信息压缩与模式识别中的重要问题。提出一种图像中感兴趣区的图像信息自动检测算法,通过建立基于BP神经网络的多层检测模型,自动实现图像中ROI的自动检测与分割。并将该模型用于对车牌图像中牌照区域图像的自动分割。结果表明,该算法稳定性好,能够方便快速地实现特定ROI的自动检测与分割。     

全局Poisson抠图的实现与改进

数字抠图技术是一种把图像的前景部分从背景中分离出来的一种技术,它在电影、电视等视频制作中得到了广泛的应用。文章主要目的是对Poisson抠图方法进行改进,以取得更好的处理效果或更快的处理速度。首先对Poisson抠图技术进行了简单的介绍,并对它的实现过程进行了描述。最后,用区域生长的方法对全局Poisson抠图进行了改进,减少了算法的执行时间。     

楼宇自控和双向多媒体数据传输的全区域覆盖

探讨了楼宇自控系统和现代建筑内的多种异种网络构成的体系,讨论了在这个体系内的诸如控制网络、有线的计算机网络和无线网络间的互联互通,并分析了在这种混合网络体系下的双向多媒体数据对建筑物的全区域覆盖出现的一些特点。介绍了现代建筑中包括的不同网络技术,并提出了使用移动无线网络和有线网络的有效配合的建议,从而实现双向多媒体数据在建筑物内的全区域覆盖和远程范围内的广域覆盖。     

The role of different cues in the brain mechanism on visual spatial attention

The visual spatial attention mechanism in the brain was studied in 16 young subjects through the visual search paradigm of precue-target by the event-related potential (ERP) technique, with the attentive ranges cued by different scales of Chinese character and region cues. The results showed that the response time for Chinese character cues was much longer than that for region cues especially for small region cues. With the exterior interferences, the target stimuli recognition under region cues was much quicker than that under Chinese character cues. Compared with that under region cues, targets under Chinese character cues could lead to increase of the posterior P1, decrease of the N1 and increase of the P2. It should also be noted that the differences between region cues and Chinese character cues were affected by the interference types. Under exterior interferences, no significant difference was found between region cues and Chinese character cues; however, it was not the case under the interior interferences. Considering the difference between the exterior interferences and the interior interferences, we could conclude that with the increase of difficulty in target recognition there was obvious difference in the consumption of anterior frontal resources by target stimuli under the two kinds of cues.     

Study of Variable Step Size LMS Adaptive Algorithm Based on Variable Region

This paper puts forward a new variable step size LMS adaptive algorithm based on variable region. The step size p（k） in the algorithm varies with the variation of the region of deviation e （k） to ensure the optimization of the three performance objectives including initial convergent speed, trace ability of the time-varying system and steady disregulation. The paper demonstrates the convergence of the algorithm accompanied by random noise,     

Landslides and Slope Aspect in the Three Gorges Reservoir Area Based on GIS and Information Value Model

Slope aspect is one of the indispensable internal factors besides lithology, relative elevation and slope degree. In this paper authors use information value model with Geo graphical Information System （GIS） technology to study how slope aspect contributes to landslide growth from Yunyang to Wushan segment in the Three Gorges Reservoir area, and the relationship between aspect and landslide growth is quantified. Through the research on 205 landslides examples, it is found that the slope contributes most whose aspect is towards south,southeast and southwest aspect contribute moderately, and other five aspects contribute little. The research result inosculates preferably with the fact. The result of this paper can provide potent gist to the construction of Three Gorges Reservoir area in future.     

关于初等函数的连续问题

对初等函数连续性的两种提法进行了分析，论证了其中一种提法是错误的。     

基于噪声特征参数估计的视频运动区域自动提取

视频运动区域的自动提取是视频对象生成的关键。提出了一种视频运动区域的自动提取方法 ,首先对当前视频帧进行全局运动估计和补偿 ,并和上一帧进行差分运算 ,然后通过估计噪声特征参数自适应地滤除噪声 ,从而提取出运动区域。与传统的差分方法相比 ,该方法具有更强的鲁棒性和精确性。实验结果表明了该方法的有效性。     

山区的开发治理与脱贫

论述了开发治理山区的重要性，并通过两则典型实例说明了如何将综合治理与脱贫结合起来，也就是把发展生产、建设环境、培植资源结合起来，才能使我国４亿贫困人口真正走上富裕之路