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Search Results: 1 - 10 of 313111 matches for " 王欣 "
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部分分式方法与有限三角和的计算
Partial Fraction Decompositions and to Trigonometric Sum Identities
 [PDF]


Pure Mathematics (PM) , 2011, DOI: 10.12677/pm.2011.12020
Abstract: 本文利用部分分式方法,证明了一类含有参变量的有限三角函数求和公式,从而推广了Chu和Marini(1999)的相关结论。
By partial fraction decomposition method, we prove a general summation formula on trigonometric sum, which contains several interesting trigonometric identities as special cases.
哈尔滨地区甘蓝根肿病的病原鉴定
Pathogen Identification of Cabbage Clubroot in Harbin Area
 [PDF]

,
Hans Journal of Agricultural Sciences (HJAS) , 2015, DOI: 10.12677/HJAS.2015.53013
Abstract:
本试验对哈尔滨地区甘蓝(Brassica oleracea L.)发生的根部肿大、地上部不能形成叶球的新病害进行了鉴定,通过形态学观察,致病力测定,初步确定该病是由芸薹根肿菌(Plasmodiophora brassicae Woron.)侵染引起的甘蓝根肿病。随后利用根肿菌的核糖体DNA (rDNA)内转录间隔区(internal transcribed spacer, ITS)的保守性和变异性,用根肿菌ITS区段特异性引物对病原菌DNA进行PCR扩增,并将测序结果在GenBank中进行同源性比对分析,分子鉴定与形态学鉴定结果一致。
The pathogen causing clubroot on cabbage (Brassica oleracea L.) in Harbin area was identified in this study. By morphological observation and pathogenicity testing, this paper preliminary suspects that this disease is caused by Plasmodiophora brassica Woron. Then by using the conservation and variability of the internal transcribed spacer (ITS) of Plasmodiophora ribosome DNA, the sequence was analyzed by comparing with that in GenBank. The molecular identification indicated the same results with morphology identification.
北京与台湾乡村旅游创意提升发展比较研究
The Comparative Study on the Creative Promotion Development of Rural Tourism of Beijing and Taiwan
 [PDF]

, 张立莉
Service Science and Management (SSEM) , 2016, DOI: 10.12677/SSEM.2016.54013
Abstract:
以文化创意产业的思维与生产模式融入乡村旅游的融合发展,是提升乡村旅游品质与效益的基本方向之一。台湾乡村旅游的发展已积累了一定的经验,文化创意价值体现较为充分。通过对比研究发现,北京乡村旅游的创意提升与台湾存在文化、市场、政策等方面的显著差异。大陆的优势在于深厚多元的文化、快速成长的市场和创意阶层,以及政府力量等方面,但在土地政策、农户的意识和素质、资本力量等方面有局限。北京一方面应借鉴台湾地区的发展经验,另一方面更应发挥自身优势走出新的道路来。
The development of rural tourism, which applied the thinking and the mode of production of the cultural creative industry, is one of the basic directions that can improve the quality and efficiency of rural tourism. The development of rural tourism in Taiwan has accumulated some experience; cultural and creative value is more fully reflected. Through the comparative study, Beijing and Taiwan have different policy, culture, resources and other conditions in the creative promotion development of rural tourism. The advantages of mainland lie in the deep cultural diversity, the rapid growth of the market and the creative class, as well as government forces, but there are lim-itations in the land policy, the consciousness and quality of the farmers, and capital strength, etc. Beijing should learn from the experience of the development of the Taiwan area, on the other hand should give full play to its advantages to get out new roads.
浅谈导游自由执业的监管问题
Study on the Institutional Guarantee of Freelance Tour Guide
 [PDF]

蔡凤,
Service Science and Management (SSEM) , 2016, DOI: 10.12677/SSEM.2016.55016
Abstract:
目前游客呈个性化和散客化趋势明显,导游自由执业的创新改革,不仅顺应了市场的需求,也有利于缓解一直紧张的游客与导游的关系。但是导游自由执业并非完全自由,伴随着游客的合法权益保障、导游公共服务监管平台的搭建、导游自由执业在法律层面的制度改革和导游市场秩序的管控等一系列监管问题亟待解决。
Currently, the trend of tourists that are personalized and individual is obvious, and the reform of innovative freelance tour guide not only conforms to the needs of the market, but also helps ease relations which have been strained between tourists and guides. However, freelance tour guide’s practice is not entirely free, with the ensuing problems such as the protection of legitimate rights and interests of tourists, building the regulatory public service platform for guides, other legal aspects of the reform of freelance tour guide and control of guide market’s order are a series of regulatory issues to be solved.
第20届巴西世界杯足球赛亚洲球队与四强球队技战术运用情况的对比分析
The Contrastive Analysis of Tactics Application between Asian Teams and Four Top Teams in the 20th Brazil World Cup
 [PDF]

李志,
Advances in Physical Sciences (APS) , 2016, DOI: 10.12677/APS.2016.43017
Abstract:
运用文献资料、录像观察、数理分析等方法,通过对第20届世界杯足球赛亚洲参赛球队与四强球队在球员身体形态、比赛阵型、进攻技战术、防守技战术等方面进行比较研究。结果显示:(1) 亚洲球员在顶级联赛效力人数少;(2) 亚洲球员身体形态方面与四强球队有差距;(3) 在战术阵型上,本届世界杯大部分球队都采用4-2-3-1的攻守平衡阵型;(4) 攻击能力和防守能力等方面亚洲球队存在明显的不足,四强球队将个人技术和整体的完美结合是今后足球发展的趋势。
We have made a comparative study about players’ body shape formation, game formation, attacking tactics and defensive tactics, etc. between Asian teams and four top teams in the Twentieth Brazil World Cup, by using the methods of literature, video observation, and mathematical analysis. It turns out that, (1) the Asian players in the top league is few; (2) there is difference on the players’ body shape between Asian players and the top four teams players; (3) on the tactical formation, most of the World Cup teams took the 4-2-3-1 perfect balance formation; (4) there are obvious deficiencies about the attack and defensive ability on Asian teams, and the perfect combination of personal technology and the overall like the last four teams will be the development of football in the future.
Web服务语义描述方法进展评述

现代图书情报技术 , 2010,
Abstract: 回顾Web服务语义描述的发展过程,详细介绍自OWL-S和WSDL-S之后Web服务语义描述标准的发展状况,对各种语义描述机制包括SAWSDL、WSMO-Lite以及RESTfulWeb服务的描述方法SA-REST、hREST、MicroWSMO的特点及应用状况做出研究和评述,并在此基础上分析语义技术在Web上的应用发展方向。
“为促进世界心理学发展做出杰出贡献”奖获得者──Anthony Joseph Marsella

心理科学进展 , 1998,
Abstract: “为促进世界心理学发展做出杰出贡献”奖获得者①--AnthonyJosephMarsela王欣河北师范大学教育系(石家庄050016)美国夏威夷精神病研究中心主任、夏威夷大学心理学系教授AthonyJ.Marsela1940年9月12日出生于美国俄亥...
地理信息系统软件──城市之星(Citystar)得到广泛应用

地理研究 , 1996,
Abstract: 由北京大学遥感所、城市与环境学系、北京三秦公司3S工程实验室研制的全中文微机地理信息系统软件—城市之星(Citystar),是基于Window:用Visual C++语言开发的Spaceman的更新换代产品.1996年3月,城市之星系统参加国家科委组织的国产地理信息系统基础软件测评,在总体设计与基础结构、软件功能与性能、系统开放性与商品化程度等方面,得到肯定和好评。去年12月,该系统在中国地理学会地图学与地理信息系统专业委员会学术讨论会上演示,受到与会代表的高度赞誉.
基于支持向量回归机的矿用潜水泵电动机绝缘寿命预测

煤炭工程 , 2015, DOI: 10.11799/ce201511035
Abstract: 针对矿用潜水泵电动机绝缘寿命预测问题,提出了一种新的智能预测方法。分析了矿用潜水泵电动机绝缘寿命的主要影响因素,提出了样本数据的规范化方法。以主要因素电压、温度和水压作为预测模型的输入参数,建立了基于支持向量回归机的矿用潜水泵电动机绝缘寿命预测模型。应用实例的仿真结果表明,模型的预测寿命与实测寿命相吻合,预测的误差较小,从而验证了该模型的合理性和有效性。
地理信息系统软件──城市之星(Citystar)得到广泛应用

地理研究 , 1996, DOI: 10.11821/yj1996020018
Abstract: 由北京大学遥感所、城市与环境学系、北京三秦公司3S工程实验室研制的全中文微机地理信息系统软件—城市之星(Citystar),是基于Window用VisualC++语言开发的Spaceman的更新换代产品.1996年3月,城市之星系统参加国家科委组织的国产地理信息系统基础软件测评,在总体设计与基础结构、软件功能与性能、系统开放性与商品化程度等方面,得到肯定和好评。去年12月,该系统在中国地理学会地图学与地理信息系统专业委员会学术讨论会上演示,受到与会代表的高度赞誉.
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