前景广阔的电脑绘画

电脑绘画的问世,带来了一种全新的绘画方式。与传统绘画相比,电脑绘画在创作工具、方法、手段、灵感等方面都发生了革命性的变化。电脑绘画软件取代了昔日的画笔、画纸、画板、调色盘、颜料、画刀、橡皮等;电子画笔笔宽可以任     

成功需要多长时间

两个年轻人酷爱画画。一个很有绘画的天赋,一个资质明显差一些。20岁的时候,那个很有天赋的年轻人开始沉醉于灯红酒绿之中,整天美酒轻歌醉眼迷离,丢掉了自己的画笔。而那个资质较差的年轻人则没有丢掉画笔。他虽然生活极为贫困,每天需要打柴、下田劳作,但他始终没有丢掉自己钟爱的画笔。     

论水彩风景写生

以自然景物(包括建筑)为描绘对象的绘画,在我国传统绘画中称为山水画,西洋画则称风景画,它是人们喜爱的题材之一.然而,要使风景画中的形象具有艺术性和典型性,就不能只对景物进行如实抄写,还应有所概括和取舍,从而使艺术源于生活、高于生活.     

循序渐进话绘画

儿童绘画经历了"涂鸦期""象征期"和"图式期"三个阶段,这个时期的儿童画最富有创造性与独特韵味。因此我们要学会循序渐进的指导幼儿绘画,遵循他们自身的规律。我们教师应尊重、保护幼儿这个时期所运用的方法,激发幼儿的绘画兴趣,给他们提供相应的环境,适时授予技能,开启幼儿创造思维,让幼儿尽情的运用画笔表现丰富多彩的世界。     

论水彩风景写生

以自然景物（包括建筑）为描绘对象的绘画，在我国传统绘画中称为山水画，西洋画则称风景画，它是人们喜爱的题材之一。然而，要使风景画中的形象具有艺术性和典型性，就不能只对景物进行如实抄写，还应有所概括和取舍，从而使艺术源于生活、高于生活。     

蒙太奇与拼贴艺术--现代艺术中的蒙太奇

“蒙太奇”是法语inontage的译音,原是法语建筑学上的一个术语。后被借用过来,引申用在电影上就是剪辑和组合,表示镜头的组接,是电影构成形式和构成方法的总称。“蒙太奇”手法的电影画面前后连接仅有声音或是话语的相同,而场景却完全变化切换了。这种场景切换法被移植到绘画创作中来,就有了“照片蒙太奇”的名称。有意思的是,在电影蒙太奇产生之前,早已经有一批超现实主义画家把梦境中不可能实现的景物搬上了绘画。照片蒙太奇其实就是运用画报杂志图象的“超现实主义”,不同的是不用颜料画布,而是运用画报照片这一媒介而已。     

二十四节气的美,在路上

因为喜欢传统文化,义爱看书,“80后”的她给自己起了个网名叫青简.无论诗词、绘画,还是历史、民俗,她对于传统文化的喜爱是刻在骨子里的.两年前,她无意中发现日本有个做二十四节气景物照的网站,内心开始蠢蠢欲动,二十四节气反映的是以中国黄河流域一年中的自然现象与农事季节特征为主的节候,如果用中国的风景来反应,岂不是更好？     

大象艺术家

泰国南邦自然公园,在缅栀子的树阴下,6头大象正等着上绘画课。它们面前是夹着白纸的三脚架,地上是一些盛丙烯颜料的小罐和竹画笔。不一会儿6名     

瓷质抛光弧面板工业化试生产的体会

<正> 现代建筑发展趋势之一,是大量采用“曲面圆角”的建筑造型取代传统、呆板的“平面直角”造型。现代建筑更多采用弧形墙面、弧形雨棚、弧形墙角、圆形大万、圆形立柱,从而在建筑上形成大量的各种弧形表面。 石质抛光弧面板的加工方法,是以手工打凿或金刚石筒锯切割的方式将整块石材加工成弧形毛板,将多块弧形毛板拼成圆筒固定在石材外圆磨床上,经磨削、抛光加工成为石质抛光弧面板。由于受加工方法和设备的限制,石质抛光弧面板最大加工     

基于机器学习SAR图像噪声抑制技术研究

为提高含噪声SAR（合成孔径雷达）图像的目标识别能力,提出基于机器学习的图像噪声抑制技术的研究思路。该思路通过问题估计,为舍噪声图像获得清晰的输出景物,从而生成一个与含噪声图像相符合的增强的合成景物世界。该技术以马尔可夫网络为体系,根据图像与景物、景物与景物之间的联系来确定网络上的信息传递规则,从大量的训练事例中学习并获得网络参数,利用贝叶斯方法为原图像找到理想的后验概率,生成一个清晰的超分辨率结果图。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

Low doses of a red wine ingredient figh diabetes in mice

Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Molecular motor assembly of a biomimetic system

Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence