地铁变形监测方案设计与变形分析

介绍了基于测量机器人的移动式周期变形监测方案在地铁变形监测中的应用,对基准网点和监测点的设计,以及对基准网点的确定进行了说明,并结合实例进行了论述。     

基于手机位置数据的地震灾情指标选择

选取四川阿坝州九寨沟县MS7.0地震、新疆博尔塔拉州精河县MS6.6地震、四川广元市青川县MS5.4地震作为案例分析,绘制活跃Wi Fi数量、无线网络联网设备数量、汇总在线设备数量、活跃基站数量等4种地震灾情指标在地震发生前后数量变化的折线图。根据与地震前1天变化情况的对比分析,验证地震灾情指标的可用性,选取出效果好的指标,这对进一步研究震后快速获取极震区位置、影响场方向等具有重要意义。     

Simulated distribution and ecotoxicity-based assessment of chemically-dispersed oil in Tokyo Bay

To assess risks of chemically-dispersed oil to marine organisms, oil concentrations in the water were simulated using a hypothetical spill accident in Tokyo Bay. Simulated oil concentrations were then compared with the short-term no-observed effect concentration (NOEC), 0.01 mg/L, obtained through toxicity tests using marine diatoms, amphipod and fish. Area of oil concentrations higher than the NOEC were compared with respect to use and non-use of dispersant. Results of the simulation show relatively faster dispersion near the mouth of the bay compared to its inner sections which is basically related to its stronger water currents. Interestingly, in the inner bay, a large area of chemically-dispersed oil has concentrations higher than the NOEC. It seems emulsifying oil by dispersant increases oil concentrations, which could lead to higher toxicity to aquatic organisms. When stronger winds occur, however, the difference in toxic areas between use and non-use of dispersant is quite small.     

移动互联网时代防震减灾科普宣传的问题及对策研究

在移动互联网蓬勃发展的信息技术背景下,我国防震减灾科普教育存在若干问题,如忽视受众的"数字化"特征,基于智能终端的宣传材料不足;宣传手段不能满足移动互联网时代信息化要求;宣传内容不够生动等,因此提出防震减灾科普知识泛在化宣传新模式,并根据泛在化宣传模式的特征,设计开发基于iOS系统的泛在化宣传资源,为防震减灾宣传工作提供基于移动设备的数字化资源支持。该研究对移动互联网时代地震科普宣传作了新的探讨与尝试,对于当前及未来全民普及防震减灾科学知识有积极的促进作用。     

The effect of membrane filtration on estimates of microbial ATP in New Zealand freshwaters

Concentrations of microbial ATP in 15 New Zealand lakes were determined using 2 extraction techniques. ATP was found in both the paniculate (>0.45 μm) and dissolved (<0.45 μm) fractions of the water samples. Higher concentrations of paniculate ATP were obtained when ATP was extracted directly from freshwater samples rather than following pre‐concentration on to membrane filters. Recovery of particulate ATP declined with increasing volumes of sample filtered. The magnitude of the filtration effect varied unpredictably between lakes and within lakes with time. Corrections for the presence of dissolved ATP were necessary before estimates of particulate ATP could be made by the direct extraction technique. Concentrations of dissolved ATP up to 1.2 μg L^‐1 were observed. The direct extraction technique is recommended for more accurate determination of particulate ATP in New Zealand freshwaters.     

海南东寨港重金属在多种环境介质中污染状况及评价

分析了东寨港海水、表层沉积物和生物体中重金属Cu、Zn、Pb、Cd、Hg、类金属As的含量及分布特征,并运用单因子指数法、地积累指数法评价了该调查区重金属污染程度。结果表明：东寨港海水中除Pb的含量符合二类海水标准外,其余含量均符合一类海水标准,且远低于渔业水质标准限值;表层沉积物中典型重金属元素含量都符合海洋沉积物质量一类标准,基本属于无污染区;本区湿地沉积物中的重金属含量比岛内及周边区典型红树林湿地略偏高;红树林及暗滩沉积物中重金属比东寨港水底沉积物重金属含量高,表明河口湾潮滩上的红树林区可能是重金属元素的富集区,东寨港目前可能受到了陆源污染的影响;生物体中重金属含量均符合一类标准,符合无公害水产品的要求。     

2007年宁洱6.4级地震序列精定位

Five mobile digital seismic stations were set up by the Earthquake Administration of Yunnan Province near the epicenter of the main shock after the Ning’er M6.4 earthquake on June 3, 2007. In this paper, the aftershock sequence of the Ning’er M6.4 earthquake is relocated by using the double difference earthquake location method. The data is from the 5 mobile digital seismic stations and the permanent Simao seismic station. The results show that the length of the aftershock sequence is 40km and the width is 30km, concentrated obviously at the lateral displacement area between the Pu’er fault and the NNE-trending faults, with the majority occurring on the Pu’er fault around the main shock. The depths of aftershocks are from 2km to 12km, and the predominant distribution is in the depth of 8～10km. The mean depth is 7.9km. The seismic fault dips to the northwest revealed from the profile parallel to this aftershock sequence, which is identical to the dip of the secondary fault of the NE-trending Menglian-Mojiang fault in the earthquake area. There are more earthquakes concentrated in the northwest segment than in the southeast segment, which is perhaps related to the underground medium and faults. The depth profile of the earthquake sequence shows that the relocated earthquakes are mainly located near the Pu’er fault and the seismic faults dip to the southwest, consistent with the dip of the west branch of the Pu’er fault. In all, the fault strike revealed by earthquake relocations matches well with the strike in the focal mechanism solutions. The main shock is in the top of the aftershock sequence and the aftershocks are symmetrically distributed, showing that faulting was complete in both the NE and SW directions.     

基于PDA的管线测量系统的设计与实现

主要分析了基于PDA的管线测量系统的建设目标,阐述了系统的技术体系,介绍了系统功能及应用实践。     

Ophiolite complexes as collision zone markers: making the case for the Antique Ophiolite Complex, Panay Island, central Philippines

The collision between the North Palawan Block (NPB) and Philippine Mobile Belt (PMB) has been the subject of studies considering its significance in help-ing define the tectonic evolution of the Philippine is-land arc system. The geology of the western Panay island reveals the presence of a continent-related block (Buruanga Peninsula) juxtaposed to an oceanic frag-ment (Antique Ophiolite Complex). Our recent work in the Buruanga Peninsula helped us define the terrane boundary between the Peninsula and the Antique Ophiolite Complex. However, considering available published data, the Antique Ophiolite Complex has never been considered to be a part of the NPB and to mark the collision zone between Palawan and the PMB.     

基于移动GIS的土地执法动态巡查系统建设

目前土地执法巡查工作存在着作业方式落后、信息化程度低、巡查效率低和巡查人员不易监督的问题。针对这些问题,通过分析土地执法巡查的业务需求和移动GIS技术的特点提出构建基于移动GIS的土地执法动态巡查系统,在此基础上完成系统总体架构设计和功能设计,分析系统实现的移动GIS技术、数据库引擎技术、Web Services技术和基于时间维的GIS管理技术,重点阐述移动GIS技术在系统中的应用,最后完成系统开发。系统的使用改善了执法巡查现状,提高了巡查效率。