共查询到20条相似文献，搜索用时 249 毫秒
1.
姚虹 《内蒙古科技与经济》2007,(21):444
在太阳能工程测试中正确使用不确定度与有效数字非常重要.本文通过对不确定度理论和有效数字的简要阐述,对实例的计算,说明应如何在太阳能测试中正确使用不确定度与有效数字. 相似文献
2.
3.
蒙古文的书写规则是惟一竖写的文字,给软件的测试造成很大的困难,GUI测试是在已知产品所应具有的功能,通过测试来检测每个功能是否都能正常使用,着眼于程序外部结构、不考虑内部逻辑结构、针对软件界面和软件功能进行测试. 相似文献
4.
空间关联规则是空间数据挖掘所要发现的一种重要知识。一般的空间关联规则研究是基于传统的关联规则,然而这些方法在处理空间关系时是不适用的。同位规则问题的提出,很好的解决了挖掘正确有效的空间关联规则的需要。在介绍空间多维分类数据同位规则挖掘算法的基础上,对该算法进行了一点改进,使其能更好的针对不同的实际数据进行处理。 相似文献
5.
空间关联规则是空间数据挖掘所要发现的一种重要知识。一般的空间关联规则研究是基于传统的关联规则，然而这些方法在处理空间关系时是不适用的。同住规则问题的提出，很好的解决了挖掘正确有效的空间关联规则的需要。在介绍空间多维分类数据同住规则挖掘算法的基础上，对该算法进行了一点改进，使其能更好的针对不同的实际数据进行处理。 相似文献
6.
山西城镇化发展模式优化与空间整合 总被引：1，自引：0，他引：1
加快城镇化进程已成为山西扩大内需、推动经济增长的战略重点,成为统筹城乡发展、解决＂三农＂问题的重大举措,其城镇化道路在多元性的基础上具备丰富的地域类型特征。本文提出以主体功能区划作为城镇化主导模式研究和确定的必要基础,以优化开发区和重点开发区的城镇化发展为主线,通过＂空间准入＂政策规则制定出不同主体功能区内相应不同类型的空间使用要求,从区域层面把经济中心、城镇体系、产业聚集区、基础设施以及生态保护区、禁止开发地区等落实到具体的功能空间并采取相应的空间治理机制和政策措施,在此基础上确立了山西省城镇发展主导模式及其空间整合的基本战略,并提出了山西城镇化主导模式的选择框架,有助于对不同区域的城镇化模式作个性化的选择与优化。 相似文献
7.
Rough集是一种处理不确定问题的有效数学工具,利用经典Rough集模型中使用的等价关系信息粒化,构建基本信息粒模型,描述关系数据库中关联规则的挖掘过程,并给出了挖掘所有关联规则的算法. 相似文献
8.
本文介绍了认知语用学的宏观结构以及宏观规则即删略规则、概括规则、组构规则,英语专业八级阅读测试（TEM8）要求及题型特点,阐释了宏观规则运用于TEM8阅读测试应试的必要性及具体应用,旨在为广大语言学习者提供一种新的阅读应试技巧,进一步提高阅读能力。 相似文献
9.
10.
研究了基于关联规则的Apriori算法、FP-Growth算法,分析了两类算法的缺点.提出利用遗传算法改进关联规则挖掘算法,给出了属性种群和规则种群的适应度函数,并且给出了具体的算法流程.利用某企业服务网站WEB服务器的使用日志,来测试3种算法的性能.实验结果表明,改进算法的运行时间最短,提高了数据挖掘效率,完全可以应用于电子商务系统中. 相似文献
11.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
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. 相似文献
12.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US 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 the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
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. 相似文献
13.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
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. 相似文献
14.
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. 相似文献
15.
Puay Tang 《The Information Society》1998,14(1):19-31
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. 相似文献
16.
Milton Mueller 《The Information Society》2001,17(3):151-163
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. 相似文献
17.
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.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
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. 相似文献
18.
《中国科学院院刊(英文版)》2014,(3)
<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 相似文献
19.
Chinese Scientists Use Earth Observation Technologies to Study and Protect Wild Camels 总被引：1，自引：0，他引：1
《中国科学院院刊(英文版)》2014,(3):267-268
<正>Chinese scientists plan to apply Earth Observation technologies to protect the critically endangered wild camels(Camelus ferus).With the help of remote sensing,satellite positioning,geographical information system and wireless sensors networks,they will be able to access the distribution and population of the wild camels and protect their habitats.The project will be carried out by the International Research Center for Wild Camel Conservation,which was jointly established earlier this year by the Institute of Remote Sensing and Digital Earth(RADI)of the Chinese 相似文献
20.
WANG Sijia 《中国科学院院刊(英文版)》2014,(2):192-194
<正>The Paul Gerson Unna Research Group on Dermatogenomics was founded in October 2012 at the Partner Institute for Computational Biology.The ultimate goal of the group is to understand the biology of skin and skin appendages. 相似文献