基于神经网络的葡萄酒质量评价

通过运用BP神经网络的方法分别对酿酒葡萄的理化指标与葡萄酒质量以及葡萄酒的理化指标与葡萄酒的质量进行了分析,将拟合值与实际值比较,得出酿酒葡萄和葡萄酒理化指标对葡萄酒的质量都有影响,但单一地用两者去判断都存在不合理性。     

基于理化指标的葡萄酒质量分析

基于酿酒葡萄及葡萄酒的理化指标,对葡萄酒的质量进行综合评价,分析影响葡萄酒质量的主要因素.     

基于多元统计分析的葡萄酒评价与指标关联研究

现行葡萄酒评价最有效的方式是通过聘请一批有资质的评酒员进行品评、给分来确定。而针对酿酒葡萄和葡萄酒的理化指标进行酿酒葡萄的分级和葡萄酒得质量评价尚需做进一步的探讨。本文通过主成份分析法、聚类分析法、典型相关分析等方法,依据酿酒葡萄和葡萄酒的理化指标建立了基于主成分分析和聚类分析的酿酒葡萄分级模型、基于典型相关分析的指标联系模型。此项研究可以通过大数据背景下的数据建模分析,减少葡萄酒评级中人工工作量,给予品酒师大数据模型决策。     

基于多元线性回归对酿酒葡萄与葡萄酒关系的研究

本文主要基于多元统计方法分析和研究了酿酒葡萄与葡萄酒关系的问题。最终得到了葡萄酒花色苷与葡萄理化指标的多元线性回归方程。     

基于BP神经网络的葡萄酒质量快速预测模型

本文通过建立BP伸进网络模型,对由灰色关联度分析选出7个葡萄理化指标作为BP神经网络的输入变量,葡萄酒的评分作为输出,并用三组样品进行预测,得出预测值分别为:70.4187、68.1480、65.0617,与真实值的相对误差分别为:3.56%,5.35%,9.64%,从而证实了通过BP神经网络对葡萄酒质量进行预测的方法是可行的。     

四川金川县酿酒葡萄和葡萄酒的现状分析与发展建议

金川县是我国高海拔葡萄酒产区之一,种植海拔1800-2850米之间,具有优良的生态环境、适宜酿酒葡萄和优质葡萄酒的生产。本文从金川县酿酒葡萄的土壤、微气候、葡萄和葡萄酒生产的情况,分析金川县发展酿酒葡萄和葡萄酒的基本现状,提出发展酿酒葡萄应"因地制宜,合理布置品种格局";"对于海拔高于2500米的区域适当提高种植密度";"加强水肥管理":"开展品种品质研究"等建议。结合目前金川县葡萄酒的现状,提出"按海拔高度调控成熟度":"发展个性化的葡萄酒和品种酒","开展金川县葡萄酒的拼比和推介会","开展不同海拔区域的葡萄酒和品种酒品质和风味特征的研究","积极开展金川县葡萄酒地理标志的申请和认证工作"等建议,以期促进金川县酿酒葡萄和葡萄酒产业可持续发展。     

以科学发展观统领全局，规划建设世界一流葡萄酒学院——葡萄酒学院学科建设工作发展思路

西北农林科技大学葡萄酒学院是在1985年创办“葡萄栽培与酿酒”专业的基础上,于1994年4月20日正式成立。是亚洲第一所专门从事葡萄与葡萄酒研完推广、培养从事葡萄与葡萄酒生产、销售、教学、科研工作的高级专门人才的学院。葡萄酒学院的成立,得到了中国政府、各有关部委、国内外有关机构、企业和专家的大力支持。学院秉承“耕土耕心,酿酒酿人”的院训,在人才培养、学科建设、科学研究、社会服务、国际合作与交流等各方面取得显著成果,为中国葡萄与葡萄酒事业的发展做出了突出的贡献。葡萄酒学院的建设总目标是：立足中国葡萄与葡萄酒产业的需求,建设世界一流葡萄酒学院。学院将在社会各界的支持下,通过广泛的合作与交流,为中国葡萄与葡萄酒教育事业,为中国葡萄与葡萄酒产业的发展作出新的贡献。     

耕土耕心 酿酒酿人——记西北农林科技大学葡萄酒学院

28年前．在三秦大地上．当时的西北农业大学在我国率先开办了第一个”葡萄栽培与酿酒”专科专业,一时轰动全国;19年前．同样在西北农林科技大学．亚洲第一所专门从事葡萄与葡萄酒研究、技术服务的葡萄酒学院成立,震动亚洲。“耕土耕心,酿酒酿人”,     

水果类植物葡萄基因组首次成功破译

法国科学家宣布,他们完整地测定出一种酿酒葡萄的基因组。这是科学界首次成功破译水果类植物的基因组。尽管研究结果不会增加葡萄酒酿造的神秘性,但科学家们相信,它将有利于改进葡萄酒香味,以及提高葡萄对疾病的抵抗力。葡萄是迄今为止第四种基因组得到完整破译的开花植     

酚类物质对葡萄酒品质的影响

葡萄酒中含有酚类物质,是葡萄酒的重要组成物质。而葡萄酒中的酚类物质的种类、数量等因素都会影响葡萄酒的品质。葡萄酒中的酚类物质主要为类黄酮以及非类黄酮类,主要从制造原料葡萄的果实、茎梗,或者酿酒用的木桶等物质中产生出来,这些酚类物质主要对葡萄酒的口味、颜色、气味等产生影响,因此,本文主要探讨酚类物质对葡萄酒品质的影响。     

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.     

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.     

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.     

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