基于MapX的城市交通流诱导系统仿真的实现     

肖定华  赵书玲 《科技广场》2007,(9):153-155

本文从武汉城市交通的特征出发,利用地理系统GIS开发软件商MapInfo公司提供的GIS软件开发平台MapX组件,结合微软公司提供的面向对象VC编程工具进行二次开发。通过介绍城市交通流诱导系统的功能模块,分析了此系统功能模块实现的各个方面因素,结合武汉实际交通情况,并以容量限制-多路径方法来实现城市交通流诱导系统仿真。  相似文献   

睾丸扭转对大鼠生精能力的影响及维拉帕米的保护作用     

苗文隆  张斌  凌海滨 《河北北方学院学报(医学版)》2005,22(5):10-12

目的:探讨钙离子通道拮抗剂(维拉帕米,verapamil)对大鼠睾丸扭转复位后睾丸细胞损伤的保护作用.方法:选用出生1个月左右的健康雄性SD大鼠30只,随机平均分成3组,手术制作幼鼠睾丸扭转模型(720°,2h).对部分扭转组应用生理盐水或钙离子通道拮抗剂(维拉帕米).术后6个月处死,取两侧睾丸标本,测定睾丸NO含量、NOS活性,并制备细胞悬液,检测记录每样本中单倍体细胞占细胞总数百分比.结果:B组(扭转组)单倍体细胞占细胞总数明显下降,而且睾丸组织NO含量、NOS活性升高,维拉帕米可减轻上述变化.结论:维拉帕米可以提高睾丸组织单倍体细胞的百分比,在一定程度上可以减轻睾丸组织损伤,对睾丸的生精能力有明显的保护作用.  相似文献   

Antiviral activities of extracts from Hong Kong seaweeds     

Engchoon Vincent OOI  Put O. ANG Jr. 《Journal of Zhejiang University. Science. B》2008,9(12):969-976

We extracted six Hong Kong brown seaweed species with hot water for their antiviral properties. The cytotoxicity and antiviral activity of these extracts were tested by MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenlytetrezolium bromide] method, cytopathic effect reduction assay, and plaque reduction assay. The antiviral effect was further determined by flow cytometric analysis. The results showed that most of these extracts inhibited the propagation of herpes simplex virus types 1 and 2 (HSV-1 and HSV-2) standard strains with very low cytotoxicity to the host cells. The extracts ofHydroclathrus clathratus and Lobophora variegata showed more potential anti-HSV activities than the extracts of the other four seaweeds. They also had moderate anti-respiratory syncytial virus (RSV) activities but could not inhibit influenza A virus. Hydroclathrus clathratus was further extracted by diluted acid and alkali and the antiviral effects of the extracts were also detected. The result showed that the hot water extract contained the main carbohydrate components that exhibited the antiviral activities against various strains of HSV, including the acyclovir-resistant strain. HI-3, a compound fractionated from this hot water extract, showed a dose-dependent anti-HSV activity in flow cytometric analysis and plaque reduction assay.  相似文献   

校园一卡通系统商务网关故障的思考     

郑瑞卿 《宜春师专学报》2014,(12):57-58

为了加强校园信息化建设和为学生提供便捷的生活方式,各高校都建立了校园一卡通系统,将商务消费与身份识别两大类应用融合在一起。校园一卡通系统是一个庞大而复杂的系统,维护也是一个复杂的系统工程。  相似文献   

基于心流理论的教育游戏设计框架要素研究--以特殊儿童言语学习游戏为案例     

王永固  张婷  李玮  黄碧玉 《电大教学》2014,(3):97-104

构建有效的教育游戏设计模型是当前亟待研究的课题。在国内外心流理论和教育游戏设计相关成果的基础上,使用基于设计的研究方法,构建了基于心流理论的教育游戏设计框架。继而分析了该设计框架的构成要素及其设计方法,并基于该研究框架研发了特殊儿童言语学习游戏案例且进行了实证研究。研究发现,学习者在教育游戏中产生心流体验的前提条件有三个：清晰的任务目标、及时的反馈和任务与技能的平衡。为生成以上前提条件,教育游戏设计应分为四个阶段：游戏目标分析、游戏情境创设、游戏玩法设计和游戏元素设计,每个阶段应采取对应的设计任务使阶段性设计成果具备心流体验产生的条件。  相似文献   

日本社会结构的变化与教育改革的方向——从终身学习的角度看学校教育改革的方向     

牧野笃 《中学教育》2010,(4):3-21,39

泡沫经济破裂之后,日本社会出现雇用劣质化等现象。这就带来以终身雇用和论资排辈为主的所谓日本式雇用方式的崩溃。其根本原因在于日本社会的经济结构从产业社会到消费社会的转变。也可以说是从以积累为主的阶层型结构向以流动为主的平滑型结构的社会变化。日本社会应该追求的不是议论典型雇用与非典型雇用的对错,而是要创造不论典型雇用或非典型雇用,谁都能在“工作”上做自己人生的主人翁,以及可以得到尽可能的保障的社会。基于这样的观点,需要的是不论典型与非典型,只要同样的劳动就能获得同样3-资的制度,以及使自己的生活稳定,并赋予能力而能用自身的力量去过认可的人生的教育与学习机会的保障。为了将整个社会改变为新的社会,要培养能够适应此种社会的变化并肩负促进社会的“知的循环”和“知的创造”而创造出新的社会价值的人才,学校教育必须将自己组织结构改变为平滑的流动的能够创造出新价值的结构。  相似文献   

Obtaining a better understanding about travel-related purchase intentions among senior users of mobile social network sites     

《International Journal of Information Management》2017,37(5):484-496

Although a majority of seniors continue to express interest in using mobile social network sites (MSNSs), research has yet to provide sufficient understanding of this very large market’s motivations related to MSNS usage. As a viable consumer business segment, seniors are attractive enough to warrant potential MSNSs to invest necessary capital for developing tourism related MSNS designed to assist with this market’s decision making and ultimately with their purchasing behavior. To address this gap, a research model was developed for this study using seniors having used MSNSs for purposes directly related to tourism and travel. Findings revealed intrinsic motivations had stronger effects on flow experience than did extrinsic motivations. Flow experience was found to have the greatest effect on subjective well-being, which in turn highly influenced purchase intention. Results documented that senior MSNS users differed significantly according to levels of anxiety attachment. Findings provide theoretical and practical contributions for tourism research, products, and services regarding senior MSNS consumers.  相似文献   

Sovereignty, Globalism, and Information Flow in Complex Emergencies     

Rebecca Knuth 《The Information Society》1999,15(1):11-19

Because of rapid developments in information technology, abuses of sovereignty by authoritarian governments have received much publicity in recent years, raising public consciousness of massive human rights violations to new levels. Contributing to the dialogue on the influence of information technology on social systems, this article explores (1) the contested role of information in disaster relief efforts, (2) the clash of political and social values emerging from the use of information within the international community's involvement in high-profile crises, such as those in Somalia, Bosnia, and Rwanda, and (3) the resultant rethinking of government's power within national borders, sovereignty. With life-anddeath stakes, international affirmation of a free flow of information during disasters is emerging as a global human rights mandate.  相似文献   

公交流转系统研究     

宁冬梅 《科技广场》2010,(3):155-157

公文流转系统是目前比较流行的OA办公系统中的核心部分,本文主要从其发展趋势、主要功能模块、系统特点几个方面进行阐述。  相似文献   

中国分地区经济活动物质流分析与比较研究     

王红  齐建国 《黑龙江生态工程职业学院学报》2015,(5):71-83

物质流分析是制定资源高效循环利用政策、克服经济增长与资源环境矛盾的重要工具。利用统计学、主成分分析和超效率 DEA 分析等方法,对2013年我国31个省市区经济活动的物质流进行系统的比较分析,结果表明：我国物质投入存在明显的有规律的省际和区域差异,东部地区和西部地区间的差异尤其明显;主要影响因素有人口密度、人均物质资源蓄积存量、人均 GDP、产业结构、R&D 投入及矿产资源禀赋强度等,社会经济综合成分、二产比重及人口密度二维成分和资源禀赋单成分是解释其大部分差异的三个主成分;天津、北京、上海、江苏、广东和新疆等省市区的相对物质综合利用效率大于1;根据物质投入强度和物质利用效率,31个省市区可划分为四个类别。  相似文献