Results 31 to 40 of about 10,256 (170)
Design and Implementation of Online Tax Service System [PDF]
, 2015 随着税收信息化的不断发展，税务信息系统已经逐步实现省级集中部署模式。在互联网技术迅猛发展的大背景下，省级税务机关急需一套统一高效的网上办税服务系统满足纳税人网上办税的迫切需求。 新版网上办税服务厅（以下简称网上办税厅）系统重新规划了系统架构，在原有功能基础上进一步扩展网上办税前端功能，增加了网上办税厅前端、资料上传、纳税人信息同步、报表资料查看等功能，着力解决服务纳税人“最后一公里”问题，为纳税人提供了更多的网上服务。 为了给纳税人提供更加高效快捷的办税服务、增进用户体验 ...
王悦
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Defining and identifying relevant stakeholders to advance effective conservation
Conservation Biology, EarlyView.The challenge of defining stakeholders in environmental science and an approach for refining existing definitions. Abstract Stakeholder is a contested term that has spawned a multitude of ad hoc definitions. The ambiguity of these definitions has oftentimes impeded transdisciplinary research in environmental governance and conservation science because ...
Milan Büscher +5 more
wiley +1 more source
Gaoya dianqi, 2019 现有基于地表电位的接地网故障诊断需要测量大量的现场数据,为在减少现场测试工作量的同时提高接地网地表电位分布计算的准确性,文中提出了基于回声状态网络的接地网地表电位计算方法。首先利用接地网地表电位计算结果对回声状态网络进行训练,然后根据接地网结构对其进行网孔划分,最后使用少量的现场测试数据输入到每个区域的回声状态网络模型来计算得到接地网的整体地表电位分布。计算结果与某接地网模型的试验结果表明,文中所提方法能得到特定网孔处的接地网地表电位分布计算模型,据此可得到较为准确的接地网地表电位分布 ...
盛青 +5 more
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A Research on the Business Model of Baidu Take-away [PDF]
, 2016 二十一世纪以来，随着移动互联网技术的日益发展，人们生活节奏的加快和移动支付技术的成熟，外卖平台这一传统餐饮和移动互联网技术结合的产物顺势而生。餐饮行业消费频次高，需求和覆盖人群广泛，外卖平台得以快速发展。由于一日三餐外加下午茶和夜宵，吃的需求远远高于打车的需求，作为生活服务本地化的典型代表的外卖平台成为立志提供本地化O2O生活服务的企业的必争之地。 网络外卖成为继网络团购、打车之后各大巨头的争夺高地，2015年拥有互联网巨头背景的几家外卖平台从最初的大规模烧钱形式抢占市场开始转向构建品牌认知 ...
邓梓璐
core
Conservation Biology, EarlyView.Abstract Bycatch in fisheries is one of the most serious threats to pelagic seabirds, causing major population declines. Mitigation measures can reduce bycatch substantially, but many fisheries fail to apply best practices, and seabird mortality remains high.
V. Warwick‐Evans +2 more
wiley +1 more source
Dianci bileiqi, 2015 自动气象观测场站包含集成度较高且耐压能力较弱的电子设备,易因雷电过电压、故障电压等造成损坏。采用CDEGS软件对自动气象观测站两种不同布置形式地网的接地性能进行仿真分析,将地电位升、跨步电压以及接触电压仿真结果与理论计算值进行对比,得出两种地网仿真对比后接地性能的一般规律:地电位升由地网中心地带向地网边缘地带呈现逐渐降低的趋势且中心下降幅度较边缘大;跨步电压大小与接地体距离成反比,与接地系统网格间距成正比;接触电压由接地网边缘向中心地带逐渐降低;在地网面积相同的前提下,网格状地网地电位升 ...
郭在华 +5 more
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Research of Opto-electronic Integrated Receiver in Industrial Control for POF Communication [PDF]
, 2015 随着经济的飞速发展，传统的手工生产方式正逐步被自动化的生产方式取代。工人仅操作控制面板，将生产指令经传输媒介传达至自动化设备末端进行生产的方式是大势所趋。作为传输指令的载体，采用传统的铜线进行传输已无法确保数据完整性及工业精准度。符合“光进铜退”环保政策的新兴材料——塑料光纤(PlasticOpticalFiber,POF)因具有优异的电磁抗扰性和易接续、低成本的特性，日渐广泛的应用在工业控制、车载网络、音频数据传输等各种短距离通信领域。工业控制中，POF的使用可以隔离共模电压 ...
范程程
core
LEO mega-constellation network:networking technologies and state of the art [PDF]
, 2022 The emerging low earth orbit (LEO) mega-constellation network (MCN) represented by Starlink and OneWeb were studied.The system architecture and basic working modes were introduced, and the main features of the emerging broadband MCN were summarized.Based
Jianming GUO +5 more
core +1 more source
Conservation Biology, EarlyView.Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando +54 more
wiley +1 more source
Dianci bileiqi, 2016 接地网的合理设计对于改善接地系统的接地性能有着重要意义。由于土地资源日益紧缺,变电站占地面积越来越小,对双层接地网的研究具有十分重要的意义。基于CDEGS仿真软件对双层地网进行仿真分析,完成双层地网在下层地网埋深、面积及网格疏密等参数的布置优化。从而为双层接地网的适用环境以及布置提供理论依据。
张宇飞, 席俊明
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