信息

国内要闻部分住房交易手续费自5月1日起取消或降低:国家发改委日前通知,自5月1日起取消或调整部分住房交易手续费,预计可减轻企业和居民负担41亿元。通知明确取消及降低的住房交易手续费包括:取消住房抵押手续费;因继承、     

债券基金上演春季攻势 南方多利业绩优异

春节过后,股市持续震荡,正在影响基金市场资金的流向。来自业内和渠道的信息显示。过去3个月,基金申购资金悄然变化,债券基金和货币基金得到重点关注,不断收获净申购。     

前沿资讯

国内要闻长江中下游遇严重干旱:连日来的旱情已造成湖南、湖北两省逾1700万人受灾。26日至31日,预计长江中下游地区以晴热天气为主,干旱可能进一步持续或发展。官方数据显示,截至5月26日,此次旱灾过程已造成湖北全省87县     

Video retargeting using optimized crop-and-scale

Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source videos to small display sizes.     

食物过期识别器

在家里,常有一些食物过期或变质,但是我们却无法知道它是否快过期了,吃了这种食物会对健康造成影响。所以,我就想发明一种"食物过期识别器"。这种仪器有一个按钮和两个发光器,发光器一个是绿     

部分青少年社会适应不良现象的成因分析

统计数据显示,全国有心理问题的青少年约有3000万人,其中相当一部分心理问题的产生是与社会适应不良有关的。这不得不引起我们的警惕。本文试     

Authorware中显示对象的动画途径与综合应用

一、使显示对象产生动画的三个途径 在Authorware中．所谓动画是指显示对象通过不同的方式在显示画面中由一个位置移动到另一个位置的过程。能够使显示对象产生移动的途径有三个：一是使用移动图标；二是使用显示图标：三是使用Movable变量。初学者往往对第一种方法印象深刻。对第二、三种方法很少使用。     

当代大学生网聊行为规范研究

根据中国互联网信息中心的调查数据显示：当代大学生已经是网络聊天（简称网聊）的主力军。作为当代大学生和“新新人类”的一代，他们具有独特的年龄阶段特征、社会角色使命特征和时代性格特征，所以，利用网络聊天的特性，从当代大学生参与网聊的不同目的对他们的网聊行为进行分析引导有着重要意义。[第一段]     

我国累计治理水土流失面积92万平方公里

新华网报道水利部统计显示，截至2005年底，全国累计综合治理水土流失面积达92万km^2，水土流失地区有1200多万人通过水土保持解决了温饱问题，许多农民走上了富裕之路。     

Flow Field of Circulating Fluidized Bed Reactor with Venturi Inlet Configuration

Different two-equation k-ε models were used to simulate the gas flow field generated by a new type of circulating fluidized bed reactor with venturi gas distributor. The numerical results were compared with the experimental data. It has been shown that the simulation results from the standard k-ε model have the best match with the experimental data. Based on this model, the gas flow field in the venturi diffuser and riser was analyzed by the concept of velocity nonuniformity and dead zone percentage. Both the nonuniformity of gas velocity and the dead zone percentage reach the maximum at the venturi outlet due to the effect of the vortex. At the same time, it provides a good platform for the further optimization of the inlet configuration of circulating fluidized bed reactor.