6,152 research outputs found

    Design and Implementation of E-Government Affairs Management System for a Municipal Government

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    随着我国政府机构改革的深化和政府机关宏观管理职能的加强,原有的办公模式已不能适应日益增长的事务处理、信息共享等方面的要求。为了提高管理工作效率,完善管理模式,必须充分利用现代化的信息技术,构建政府办公的电子政务系统。 本文首先对某市政府电子政务信息管理系统业务需求做出分析,详细阐述当前形势对该市电子政务系统的需求,分别对系统的参与者分析、系统的各个概念模块的用例分析、系统非功能性需求分析和系统可行性分析等进行阐述。其次,在分析需求之后,本文详细阐述系统数据库设计、系统模块划分、体系结构设计、主要模块设计;然后,详细说明如何实现系统主要模块,并将主要模块的实现代码列出,并对主要模块的实现界面进...With the deepening of institutional reform and the strengthening of the macro management functions of government departments, the original office mode has been unable to meet the growing demand for transaction processing, information sharing and other aspects. In order to improve the efficiency of management, improve the management mode, we must take full use of modern information technology to bu...学位:工程硕士院系专业:软件学院_软件工程学号:X201323131

    A Study on Demand Forecasting Process of CTP Aluminum Plates in K Company

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    K公司是一家在图文影像领域从事CTP铝版材制造的知名跨国公司。在日益激烈的市场竞争中,需求预测流程对K公司的运营具有相当重要的作用。本文以K公司的CTP铝版材产品的需求预测管理流程分析为切入点,结合相关理论对现有需求预测流程进行分析,并梳理总结出其中问题,从而提出对应改进建议并加以实施。 本文先是阐述销售与运作计划、流程改进、需求预测和供需协调四个相关理论内容,然后通过评析公司背景、产品分析、客户及销售模式等因素,进一步对K公司CTP铝版材现有需求预测流程进行梳理,分析了目前流程存在的“供需不协调”、“流程周期过长”、“缺乏预警机制”、“跨部门沟通不畅”的四个问题。接着,本文提出具体的流程改...K Company is a famous international enterprise who is engaged in the field of graphic image and CTP aluminum plates manufacturing. In the increasing fierce market competition, demand forecasting process is very important to the operation of K Company. This article will focus on the analysis of demand forecasting management process of CTP aluminum plates in K Company. And the analysis will be based...学位:管理学硕士院系专业:管理学院_工商管理硕士(工商管理硕士)学号:1792012115100

    2010_2016年国际极地研究综合评价分析

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    极地在气候系统、全球资源和战略中具有重要意义,并且随着人类对它的开发,极地研究也日益成为地球与环境科学领域的核心和热点议题。基于Web of Science 数据库收录的2010 - 2016 年SCI文章,利用文献计量方法,结合国际政策和战略,分析了2010 - 2016 年极地研究的发展格局和变化趋势。结果表明: ( 1) 近年来国际极地研究论文年发文量总体呈持续增长态势,年均增幅为3. 6%。( 2)发达国家及高纬度国家是极地领域的主要研究力量,美国占据绝对优势。( 3) 在SCI 发表的国际极地研究论文来源期刊共计915 种,来自57 个国家,美国期刊占1 /3。( 4) 结合欧盟极地研究优先领域和文献计量方法得出,极地研究未来新的发展方向侧重于人文及社会因素,重点提倡人类对极地的影响以及新技术应用。建议我国科研人员密切关注国际极地研究的发展态势和进展,鼓励海洋学、气象学、地质学、环境生态学、生物学、社会学和政治学等领域专家有计划地开展极地研究,为我国赢取极地研究国际发言权和参与度。</p

    开放科研数据的行为影响因素研究* ———以地球科学领域为例

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    摘 要: [目的/意义] 开放科研数据面临着科研人员参与度和认同度不高的挑战。文章旨在明确科研人员开放科 研数据的行为影响因素,为各利益相关者更好地激励科研人员参与实践提供参考。 [方法/过程] 研究基于计划行为理论建立模型,探究行为信念、行为态度、主观规范和感知行为控制对地球科学领域科研人员开放科研数据行为的影响; 通过问卷调查收集数据,采用偏最小二乘法结构方程模型 ( PLS-SEM) 工具 SmartPLS3. 0 分析数据验证模型。[结果/结论] 地球科学领域科研人员对开放科研数据态度直接显著影响行为; 行为信念 ( 包含感知职业利益与感知职业风险) 、感知行为控制 ( 包含感知数据基础设施和数据管理培训实用性) 显著影响科研人员的态度,且通过态度间接影响行为; 主观规范对科研人员的态度影响不明显,但对行为存在显著影响。 &nbsp; Abstract: [Purpose / significance] Open research data faces the challenge of researchers' skepticism and low participation. To find out the motivational factors that influence researchers' open research data behaviors can help stakeholders better encourage re searchers' participation. [Method/ process]Based on the theory of planned behavior,a research model was established to explore how behavioral beliefs,attitudes,subjective norms,perceived behavioral control influence earth science researchers' open research data behaviors. A questionnaire survey was conducted to collect data,partial least squares structural equation modeling (PLS-SEM) tool SmartPLS3. 0 was used to analyze the data and verify the research model. [Result /conclusion] The results show that earth sci ence researchers' attitudes toward open research data significantly influence their actual behaviors. Behavioral beliefs (including the perceived career benefit and risk) and perceived behavior control ( including the perceived available of data infrastructure and the perceived available of data management training) have significant influence on their attitudes,through which indirectly influence the actual behaviors. Subjective norms have significant influence on behaviors,but no influence on attitudes. &nbsp; </div

    Review of sea anemones compound and bioactivity

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    海葵(sea anemone)又名海菊花,多指腔肠动物门(Coelenterata)珊瑚虫纲(Anthozoa)海葵目(actiniaria)动物。海葵一般分为爱氏海葵科、链索海葵科、细指海葵科、投海葵科、固边海葵科和绿海葵科等6科37种[1]。海葵体型大多呈圆筒状,触手以辐射对称状在口周围形成数轮,广泛分布在热带和温热带海域,主要固着在海中岩石上或泥沙中。我国海域均有分布

    七种捕食性鱼类对中华绒螯蟹幼蟹捕食风险的评估

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    分别以鲤、鳜、斑点叉尾、黄颡鱼、瓦氏黄颡鱼、大口鲇和乌鳢作为捕食者,以中华绒螯蟹幼蟹作为猎物,在室内水泥池(2.4 m3)进行捕食试验。以日捕获率和日摄食率为指标,评估这些鱼类对幼蟹的捕食作用和危害程度,为提高湖泊幼蟹放流效果、建立蟹—鱼复合的优质高效养殖模式提供科学依据。在幼蟹完全暴露的条件下,经过多次(至少9次)重复的试验(短期1d和长期7d),鳜对不同大小的硬壳和软壳(刚蜕壳的)幼蟹没有任何捕食作用;黄颡鱼对硬壳和软壳幼蟹也没有捕食作用,但还需做进一步观察;虽然鲤、瓦氏黄颡鱼对硬壳蟹的捕获率低,但对软壳的幼蟹有较大的危害性,对幼蟹的日摄食率分别为0.070%、0.012%;大口鲇、斑点叉尾、乌鳢对幼蟹具有较强的捕食能力,对幼蟹的日摄食率分别为0.122%、0.188%和0.284%。根据这些研究结果,可以建议:(1)在池塘和湖泊河蟹养殖中,完全可以将鳜作为套养或混养对象,以期提高养殖效益;(2)在河蟹放养的湖泊,需要抑制乌鳢和大口鲇种群,适当减少鲤和瓦氏黄颡鱼丰度,以期减少这些鱼类的捕食作用,提高幼蟹存活率;(3)在河蟹养殖池塘,不能放养乌鳢、大口鲇、斑点叉尾、瓦氏黄颡鱼和鲤

    Bio-Inspired Aggregation Control of Carbon Nanotubes for Ultra-Strong Composites

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    High performance nanocomposites require well dispersion and high alignment of the nanometer-sized components, at a high mass or volume fraction as well. However, the road towards such composite structure is severely hindered due to the easy aggregation of these nanometer-sized components. Here we demonstrate a big step to approach the ideal composite structure for carbon nanotube (CNT) where all the CNTs were highly packed, aligned, and unaggregated, with the impregnated polymers acting as interfacial adhesions and mortars to build up the composite structure. The strategy was based on a bio-inspired aggregation control to limit the CNT aggregation to be sub 20--50 nm, a dimension determined by the CNT growth. After being stretched with full structural relaxation in a multi-step way, the CNT/polymer (bismaleimide) composite yielded super-high tensile strengths up to 6.27--6.94 GPa, more than 100% higher than those of carbon fiber/epoxy composites, and toughnesses up to 117--192 MPa. We anticipate that the present study can be generalized for developing multifunctional and smart nanocomposites where all the surfaces of nanometer-sized components can take part in shear transfer of mechanical, thermal, and electrical signals

    非离子态氨对转“全鱼”生长激素基因鲤鱼的急性毒性和慢性毒性

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    在自然水体和人工水体中氨氮对鱼类是有毒的.利用静水更新式生物测试研究了非离子态氨对转基因鲤鱼和对照鱼的96h急性毒性实验和21d慢性毒性实验.通过96h非离子态氨急性毒性实验发现,转基因鲤鱼的非离子态氨氮24,48,72和96h半数致死浓度(LC50)(2.64,2.44,2.28和2.16mg/L)分别比对照鲤鱼相应的24,48,72和96h半数致死浓度(LC50)(2.70,2.64,2.52和2.33mg/L)略低,没有显著性差异;但在不同非离子态氨氮(3.86,3.29和2.09mg/L)胁迫下
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