LAMOST Experiment for Galactic Understanding and Exploration （LEGUE） The survey＇s science plan     

Li-Cai Deng  Heidi Jo Newberg  Chao Liu  Jeffrey L. Carlin  Timothy C. Beers  Li Chen  Hsu-Tai Lee  Carl J. Grillmair  Puragra Guhathakurta  Zhan-Wen Han  Jin-Liang Hou  Sebastien Lepine  Jing Li  Xiao-Wei Liu  Kai-Ke Pan  J. A. Sellwood  Bo Wang  Hong-Chi Wang  Fan Yang  Brian Yanny  Hao-Tong Zhang  Yue-Yang Zhang  Zheng Zheng  Zi Zhu 《天体物理学报》2012,(7):735-754

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An algorithm for preferential selection of spectroscopic targets in LEGUE     

Jeffrey L. Carlin  Sebastien Lepine  Heidi Jo Newberg  Li-Cai Deng  Timothy C. Beers  Yu-Qin Chen  Norbert Christlie  Xiao-Ting Fu  Shuang Gao  Carl J. Grillmair  PuragraGuhathakurta  Zhan-Wen Han  Jin-Liang Hou  Hsu-Tai Lee  Jing Li  Chao Liu  Xiao-Wei Liu  Kai-Ke Pan  J. A. Sellwood  Hong-Chi Wang  Fan Yang  Brian Yanny  Yue-Yang Zhan  Zheng Zheng  Zi Zhu 《天体物理学报》2012,(7):755-771

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The LEGUE high latitude bright survey design for the LAMOST pilot survey     

Yue-Yang Zhang  Jeffrey L. Carlin  Fan Yang  Chao Liu  Li-Cai Deng  Heidi Jo Newberg  Hao-Tong Zhang  Sebastien Lepine  Yan Xu  Shuang Gao  Norbert Chfi＇ stlieb  Zhan-Wen Han  Jin-Liang Hou  Hsu-Tai Lee  Xiao-Wei Liu  Kai-Ke Pan  Hong-Chi Wang 《天体物理学报》2012,(7):792-804

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基于LinuxPPS的高精度校时系统实现     

于佳  胡柯良  邓元勇  商朝晖 《云南天文台台刊》2012,(1):39-45

为了实现南极天文观测设备的精确校时,采用搭建高精度网络时间协议NTP（Network Time Protoc01）服务器的方法实现。基本思路是从NMEA0183数据中提取时间信息,通过PPS信号保证高精度。具体实现方法：主要采用GPS接收芯片G591构造硬件电路,软件部分需要LinuxPPS（Linux Pulse Per Second）和NTP服务器软件的正确安装和配置。对照实验表明基于LinuxPPS的NTP服务器是精确、稳定而可靠的。  相似文献   

基于JDBC的通用数据库访问和星表录人工具     

袁海龙  董建  邓小超  张昊彤  李锋  王坚  金革 《云南天文台台刊》2012,(1):62-69

LAMOST（Large Sky Area Multi-Object Fiber Spectroscopy Telescope）的巡天战略系统的主要功能是安排观测计划,而规划巡天星表是开展所有工作的初始步骤。天文研究人员或者巡天观测人员需要从各种类型的数据库进行选星、提取和录入。使用JDBC（Java Database Connectivity）数据库访问技术,利用面向对象的编程思想,实现了一个能访问多种类型数据库、获取星表数据、数据格式转换和星表录入的工具,支持大数据量处理,为天文研究人员以及巡天观测管理人员提供帮助。  相似文献   

关键路径法在地震监测设施建设定额编制中的应用     

邓阳  杨文东  胡宝慧 《地震地磁观测与研究》2013,34(3)

从项目管理角度出发,介绍关键路径法在项目管理中应用的基本原则和方法,并在《地震监测设施建设标准定额体系研究》项目管理中实际应用,不仅在计划制定期间求得工期、资源、成本的优化,而且在计划的执行过程中,通过信息反馈,进行有效的监督、控制和调整,保证项目在预定期望中的目标实现,通过识别并严格执行关键路径,提高项目管理的效率,压缩项目实施进度.  相似文献   

A~200 ka pollen record from Okinawa Trough:Paleoenvironment reconstruction of glacial-interglacial cycles   总被引：1，自引：0，他引：1  

ZHENG Zhuo  HUANG KangYou  DENG Yun  CAO LingLong  YU ShaoHua  Jean-Pierre SUC  Serge BERNE  Franois GUICHARD 《中国科学:地球科学(英文版)》2013,56(10):1731-1747

Pollen analysis was carried out on the Core MD982194 of 29.78 m retrieved from the Middle Okinawa Trough which was dated as old as~200 ka BP.The results revealed that pollen assemblages mainly presented an alternation of coniferous and herb pollen.The coniferous saccate pollen,principally Pinus and Tsuga,predominated in most parts of the core,especially highlighted in the interstadial stages including MIS 1,3,5 and MIS7,whereas the herb pollen significantly increased in the glacial periods.Thus the pollen flora and their percentages showed the sensitive changes under the influence of ice volume during the glacial and interglacial periods.Our record from this core has first documented that the percentage of Cyperaceae was extremely high in the glacial stages with a notable increase in Artemisia,Gramineae,Asteraceae,Chenopodiaceae,and freshwater algae,which can be used as a proxy for sea-level change at the study site because of their close negative correlation of the orbital-scale changes in sea level.The distance between the continental coastline and the Okinawa Trough has deeply shortened due to the sea-level drop in the LGM.As a result,the sediment materials from Yangtze River were extensively deposited on the flat,exposed continental shelf owing to the rapid decline of river flow speed,leading to that pollen grains from Okinawa Trough are derived mainly from the flat coastal vegetation of exposed continental shelf at glacial stages.Changes of pollen assemblage were consistent with the variation of temperature and humidity,which showed that the percentage of arboreal pollen was highly augmented at MIS 7,5 and MIS 1,corresponding to the strengthening of the East Asian summer monsoon and increasing of rainfall.Moreover,the peak of Pinus percentage in MIS 5.3,5.1 and MIS 3.3 may be closely linked by orbital and sub-orbital cycles of solar radiation and monsoonal variability.The present study of core MD981294 implied lower temperature and precipitation during the lowest sea-level stage(LGM),and more visibly testified that the vegetation of the flat plain on the exposed continental shelf was dominated by intrazonal communities such as halophyte grasslands and freshwater wetlands instead of zonal steppe or semi-arid desert.All above evidence demonstrated that the fundamental changes of pollen assemblage and their origins in Okinawa Trough since~200 ka BP were affected by combine factors including the coastline position and climate fluctuation.Moreover,the substantial shortening of distance between shoreline and the Okinawa Trough driven by orbital insolation cycles was clearly indicated by the pollen spectra,whereas the source-area climate signal of the pollen record was largely weakened.  相似文献   

Factors Affecting UV/H2O2 Oxidation of 17α‐Ethynyestradiol in Water     

Qingsong Li  Naiyun Gao  Yang Deng  Xiaoyan Ma  Wenhai Chu 《洁净——土壤、空气、水》2013,41(2):143-147

In this study, bench‐scale experiments were conducted to examine the UV/H₂O₂ oxidation of 17α‐ethynyestradiol (EE2) in water in a batch operation mode. The EE2 degradation exhibited pseudo‐first‐order kinetics, and the removal was ascribed to the production of hydroxyl radicals (^?OH) by the UV/H₂O₂ system. Typically, the EE2 oxidation rate increased with increasing UV intensity and H₂O₂ dose, and with deceasing initial EE2 levels and solution pH. At EE2₀ = 650 µg/L, UV intensity = 154 µW/cm², H₂O₂ = 5 mg/L, and neutral pH, the UV/H₂O₂ treatment was able to remove 90% of the EE2 content within 30 min. Four anions commonly present in water were found to inhibit EE2 degradation to varying degrees: > > Cl^? > . Our results demonstrate that the described UV/H₂O₂ process is an effective method to control EE2 pollution in water.  相似文献   

滇中城市群产业演进研究   总被引：2，自引：0，他引：2  

胡宗群  吴映梅  张伟  杨静思  邓小威 《地域研究与开发》2013,32(1):65-69

滇中城市群作为云南省优先开发区,其产业结构近年来一直处于"二、三、一"的演进状态。在剖析滇中城市群经济发展及产业结构时空演进特征的基础上,运用以结构多元化系数和区位熵为主要指标体系的关联分析方法,对滇中城市群现代化进程中城市产业结构演进状态进行评价,并提出滇中城市群产业结构优化调整的对策建议,以期为滇中城市群经济的稳定发展和功能区划的演进提供有益借鉴。  相似文献   

基于“污染天堂”假说检验的湖南经济增长与环境综合质量关系研究     

邓荣荣  詹晶 《地域研究与开发》2013,32(4)

选取湖南省1990-2010年经济增长、对外贸易以及环境综合质量的时间序列数据,建立经济增长与环境污染水平的计量模型,检验湖南省环境综合质量的变动轨迹.结果表明:研究期内,湖南省环境污染的变动轨迹大致呈底部平滑的正“U”型曲线,由于湖南经济增长对环境始终存在负的规模效应与正的技术效应,环境曲线的变动轨迹主要取决于经济增长的结构效应,因此,实现产业结构的升级,合理配制轻重工业的比重,在经济增长与环境效益中寻求平衡,是湖南改善环境质量与经济发展关系的关键;此外,无论从FDI还是出口贸易的角度来看,“污染天堂”假说在湖南均不成立.  相似文献