安卓手机的草地信息协同采集系统     

胡云锋  董群  陈祖刚  董昱  戴昭鑫  张云芝 《测绘科学》2017,42(6)

针对传统的草地资源调查方法流程繁琐、效率较低、多人协同能力较差等问题,该文提出了基于安卓手机的草地信息协同采集系统架构,设计了位置获取、地图显示、采样规划、信息采集、数据展示、报表生成、数据同步等系统核心功能模块,并应用Java语言开发,完整实现了系统各项功能。在内蒙古自治区及河北省的野外考察验证表明,该系统能够满足草原监察和科研部门对于草地资源调查的基本需求。  相似文献   

龙岗区信息采集终端管理与指挥平台系统设计和研究     

陈明娥 《测绘与空间地理信息》2017,(8)

结合龙岗区网格化管理的实际,通过对龙岗区网格数据管理需求的分析,探索龙岗区信息采集终端指挥与管理平台的架构。该移动业务系统的主要功能是:为龙岗区基层网格信息员和网格志愿者、社会公众等提供信息服务,建设龙岗区工作动态实时监控、高效管理的信息指挥平台,以及完成该系统与市区其他业务系统的数据对接。基于此,本文分别从技术、系统架构和系统功能等方面对龙岗区信息采集终端管理与指挥平台系统进行设计和研究。  相似文献   

典型北斗低成本导航型与测量型终端定位性能初步对比分析     

王强  袁一歌  马建峰  汪亮 《大地测量与地球动力学》2020,40(4):381-365

基于不同类型北斗终端的共天线零基线实测数据,从伪距标准单点定位、单频伪距相对定位以及单历元单频载波相位相对定位等方面,比较一款典型低成本导航型北斗终端与一款典型高性能测量型北斗终端的定位性能差异。结果表明,导航型北斗终端相比于测量型终端,其伪距单点定位和伪距相对定位的精度稍差,但载波相位相对定位精度差距十分明显,无法实现cm级的定位。  相似文献   

Global sustainability,innovation and governance dynamics of national smart electricity meter transitions     

《Global Environmental Change》2021

Smart electricity meters are a central feature of any future smart grid, and therefore represent a rapid and significant household energy transition, growing by our calculations from less than 23.5 million smart meters in 2010 to an estimated 729.1 million in 2019, a decadal growth rate of 3013%. What are the varying economic, governance, and energy and climate sustainability aspects associated with the diffusion of smart meters for electricity? What lessons can be learned from the ongoing rollouts of smart meters around the world? Based on an original dataset twice as comprehensive as the current state of the art, this study examines smart meter deployment across 41 national programs and 61 subnational programs that collectively target 1.49 billion installations involving 47 countries. In addition to rates of adoption and the relative influence of factors such as technology costs, we examine adoption requirements, modes of information provision, patterns of incumbency and management, behavioral changes and energy savings, emissions reductions, policies, and links to other low-carbon transitions such as energy efficiency or renewable energy. We identify numerous weak spots in the literature, notably the lack of harmonized datasets as well as inconsistent scope and quality within national cost-benefit analyses of smart meter programs. Most smart meters have a lifetime of only 20 years, leading to future challenges concerning repair, care, and waste. National-scale programs (notably China) account for a far larger number of installations than subnational ones, and national scale programs also install smart meters more affordably, i.e. with lower general costs. Finally, the transformative effect of smart meters may be oversold, and we find that smart electricity meters are a technology that is complementary, rather than disruptive or transformative, one that largely does not challenge the dominant practices and roles of electricity suppliers, firms, or network operators.  相似文献   

计量用水智能监测系统的设计与实现     

黄静  郭勇  李乃玮 《物探化探计算技术》2003,25(3):237-240

水位传感器与单片机智能遥测终端相配合设计的计量用水智能监测系统可以通过电话线，将计量用水信息远程数传到监控中心，并在监控中心生成各种图文、报表。通过对图文、报表的分析，实现对智能遥测终端的远程监控。该系统将在水利建设中发挥重要作用。  相似文献   

天气雷达数字化终端及其应用软件     

张晰莹张礼宝  官福顺安晓存 孟焕生 《气象科技》2004,32(4):297-299

为解决雷达数据采集、实时显示、数据存储、资料处理自动化等问题，进行了天气雷达数字化终端和应用软件技术的研究和开发。改变了711B-1雷达数据存储、分析自动化程度低的状况。增加和丰富了雷达二次产品，使雷达资料得到了充分的分析和应用，提高了雷达对天气的监测能力。增加了对冰雹、暴雨等强对流天气的预警功能、人工增雨效果检验等功能。  相似文献   

超级终端在自动站维护中的应用     

殷明洁 《气象研究与应用》2006,27(1):55-57

利用W indow s操作系统中的超级终端检测、判断自动站采集器的状态,同时可对已缺测的正点数据进行补救。  相似文献   

Variable style of transition between Palaeogene fluvial fan and lacustrine systems, southern Pyrenean foreland, NE Spain   总被引：1，自引：0，他引：1  

ALBERTO SÁEZ  PERE ANADÓN†  MARÍA J. HERRERO  ANDREA MOSCARIELLO‡ 《Sedimentology》2007,54(2):367-390

Two Palaeogene fluvial fan systems linked to the south‐Pyrenean margin are recognized in the eastern Ebro Basin: the Cardona–Súria and Solsona–Sanaüja fans. These had radii of 40 and 35 km and were 800 and 600 km² in area respectively. During the Priabonian to the Middle Rupelian, the fluvial fans built into a hydrologically closed foreland basin, and shallow lacustrine systems persisted in the basin centre. In the studied area, both fans are part of the same upward‐coarsening megasequence (up to 800 m thick), driven by hinterland drainage expansion and foreland propagation of Pyrenean thrusts. Fourteen sedimentary facies have been grouped into seven facies associations corresponding to medial fluvial fan, channelized terminal lobe, non‐channelized terminal lobe, mudflat, deltaic, evaporitic playa‐lake and carbonate‐rich, shallow lacustrine environments. Lateral correlations define two styles of alluvial‐lacustrine transition. During low lake‐level stages, terminal lobes developed, whereas during lake highstands, fluvial‐dominated deltas and interdistributary bays were formed. Terminal lobe deposits are characterized by extensive (100–600 m wide) sheet‐like fine sandstone beds formed by sub‐aqueous, quasi‐steady, hyperpycnal turbidity currents. Sedimentary structures and trace fossils indicate rapid desiccation and sub‐aerial exposure of the lobe deposits. These deposits are arranged in coarsening–fining sequences (metres to tens of metres in thickness) controlled by a combination of tectonics, climatic oscillations and autocyclic sedimentary processes. The presence of anomalously deeply incised distributary channels associated with distal terminal lobe or mudflat deposits indicates rapid lake‐level falls. Deltaic deposits form progradational coarsening‐upward sequences (several metres thick) characterized by channel and friction‐dominated mouth‐bar facies overlying white‐grey offshore lacustrine facies. Deltaic bar deposits are less extensive (50–300 m wide) than the terminal lobes and were also deposited by hyperpycnal currents, although they lack evidence of emergence. Sandy deltaic deposits accumulated locally at the mouths of main feeder distal fan streams and were separated by muddy interdistributary bays; whereas the terminal lobe sheets expand from a series of mid‐fan intersection points and coalesced to form a more continuous sandy fan fringe.  相似文献   

Long-term investigation of benthic fauna and the influence of treated ballast water disposal in Port Valdez,Alaska     

Blanchard AL  Feder HM  Shaw DG 《Marine pollution bulletin》2002,44(5):367-382

Benthic faunal structure and hydrocarbon concentrations in sediments were examined annually for 10 years (1989-1998) in Port Valdez, Alaska, where a near-bottom permitted discharge of treated tanker ballast waters containing residual petroleum has occurred since 1977. Measured concentrations of hydrocarbons in sediments near the discharge showed detectable increases in concentration, but on only one occasion were these increases either to levels exceeding ecotoxicological thresholds (Effects-Range Low, ER-L) or associated with alterations in the benthic community. Changes in faunal structure indicating disturbance were observed at one station near the discharge from 1995 to 1997 and were apparent as increased numbers of opportunistic taxa and anomalous trends in abundance and diversity. Minimum-effect (ME) hypotheses provided evidence of negligible to small effects on benthic infauna from disposal of treated ballast water. ME hypotheses have the potential to assist both researchers and managers by providing a tool to relate scientific results to ecological importance and decision criteria.  相似文献   

ON THE EFFECT OF AMBIENT TURBULENCE ON THE BUOYANT PLUME RISE          下载免费PDF全文

Du Shuming  Li Zongkai 《Acta Meteorologica Sinica》1993,7(2):224-231

Considering the effects of both entrainment and intensification of the exchanges of momentum and heat between plume and ambient air,we have derived the trajectory equation of buoyant plume under neutral conditions,and the final rise prediction formula theoretically without any hypotheses on the rise termination.Compared with the field experiments,the final rise formula simulates the observed final rise heights well.  相似文献