多制式移动终端身份感知系统研究

移动终端的合法监管是国家安全部门保障移动网络安全的重要手段,获取移动终端身份标识是实现监管的基础.首先阐述了移动终端的主要身份标识,以及监管系统相关研究现状;然后给出一种面向双频点GSM网络和WCDMA网络的多制式移动终端身份感知系统设计方案,阐明系统技术原理与实现方法,并提出对该系统进行优化的技术方案;最后进行测试,验证了方案的可行性.     

地震应急响应系统设计与实现

文章应用开源GIS软件OpenScales、GeoServer、PostGIS/PostgreSQL等,以震区基础地理信息数据和地震基本参数作为数据源,构建了基于开源GIS软件的地震应急响应系统.系统在获得地震基本参数之后快速计算地震烈度分布,通过烈度分布分析地震影响区域的道路损毁情况和防护目标、危险源的分布,同时为决策者提供最佳救援线路,可以对救援物资和救援力量进行态势标绘,为应急指挥决策和救援行动提供有效的支持.     

The depositional environment and mineralogical and chemical compositions of high ash brown coal resting on early Tertiary saprock (Schirnding Coal Basin, SE Germany)

The late Tertiary high ash brown coal (R_r=0.26%) of the Schirnding Seam Zone is mainly composed of huminite. The seam is underlain by a thick saprock (mica saprockkaolinite-mica saprock) some tens of meters thick which gradually developed from phyllitic basement rocks and a thin Footwall Series of coarse-grained clastic sediments which, however, occur only in a few places. The roof rocks ‘ Hanging Wall Series' abruptly appear on top of the seam and consist of massive gray mudstones and arenites, intercalated with some tuffites. These Tertiary series were studied in open-pit mines operated for coal and clay and in bore holes. Chemical investigation involved the analyses of TOC, TSC, Ni, Co, Pb, Zn, Ga, Be, V, Cr, U, Th, P, Zr, REE and organic compounds of extracted organic matter (=OM). Early Tertiary chemical weathering was responsible for the monotonous kaolinite-mica-goethite mineral assemblage in the saprock and the footwall series. In the coal-bearing basin a more variegated mineral association including, pyrite, kaolinite, illite, smectite, illite-smectite mixed layers and siderite was brought about by volcanic processes, intrastratal solution set free in course of coalification and early diagenesis and by meteoric waters infiltrating the coal-bearing series from uplifted parts of the basin, which underwent strong oxidation. The environment of deposition is interpreted in terms of peatswamps that were fed by small streams and crevasse splays of a meandering drainage system grading towards the basin margin into a braided stream system on an alluvial fan plain. Strongly fluctuating water levels were responsible for the pronounced cyclicity to be encountered across the coal-bearing series. The processes of element redeposition and element migration in the Schirnding Basin are operative across the interface coal-saprolite (detrital influx of heavy minerals and intrastratal solution, hydrocarbon infiltration and redistribution of organic matter, reworking of duricrusts), in the saprolite proper (weathering leachats) and across the redox boundaries between the Schirnding Seam Zone and the Hanging Wall Series (input of physils and diagenetic alteration) as well as its strongly oxidized stratigraphic equivalents at the basin edge (volcanic influx, intrastratal solutions). Chemical and mineralogical variations across the coal basin which are directly controlled by the variation in the environment of deposition, weathering and groundwater movements may be directly correlated to changes in the saprock due to the immediate contact between coal and bedrock.     

Controlling boundary conditions with a four-dimensional variational data-assimilation method in a non-stratified open coastal model

An innovative way to take the large-scale circulation influence into account in coastal primitive-equation models is explored by an inverse modelling approach. Restricted to barotropic external forcing, this work is a first step in the development of a four-dimensional variational (4DVAR) data-assimilation approach to estimate the best initial and open-boundary conditions that force a coastal model according to interior observations. This development is founded on the OPA modelling system which representation of barotropic coastal dynamics is restricted to motions of long time scales ( a day) due to its rigid lid approximation. Twin experiments are performed in an academic configuration of the Gulf of Lions (located in the northwestern Mediterranean Sea) to study the sensitivity of a remote barotropic forcing to different observational networks measuring surface currents deployed in this area. Three monitoring designs are tested for a large-scale barotropic perturbation in the hindcast mode. It is shown that the space and time distribution of observations acts on the efficiency of the 4DVAR method and then allows coarser datasets.Responsible Editor: Phil Dyke     

ISD单片语音录／放器件及电路设计

ＩＳＤ单片语音器件的独特之处，是有用直接模拟存储技术，语音信号以其原本的模拟形式直接存入模拟量存储器中并长远保存。省去了传统的Ａ／Ｄ和Ｄ／Ａ数模转换机制，能高保真的将语音内容再生。这是一种高新录／放技术。另外，给出的ＩＳＤ基本录／放电路十分简单易用。可方便地为微机系统、测控仪表、电器和广播等设备所采用，使设备具有高效功能。     

Mapping and estimating land change between 2001 and 2013 in a heterogeneous landscape in West Africa: Loss of forestlands and capacity building opportunities

In West Africa, accurate classification of land cover and land change remains a big challenge due to the patchy and heterogeneous nature of the landscape. Limited data availability, human resources and technical capacities, further exacerbate the challenge. The result is a region that is among the more understudied areas in the world, which in turn has resulted in a lack of appropriate information required for sustainable natural resources management. The objective of this paper is to explore open source software and easy-to-implement approaches to mapping and estimation of land change that are transferrable to local institutions to increase capacity in the region, and to provide updated information on the regional land surface dynamics. To achieve these objectives, stable land cover and land change between 2001 and 2013 in the Kara River Basin in Togo and Benin were mapped by direct multitemporal classification of Landsat data by parameterization and evaluation of two machine-learning algorithms. Areas of land cover and change were estimated by application of an unbiased estimator to sample data following international guidelines. A prerequisite for all tools and methods was implementation in an open source environment, and adherence to international guidelines for reporting land surface activities. Findings include a recommendation of the Random Forests algorithm as implemented in Orfeo Toolbox, and a stratified estimation protocol − all executed in the QGIS graphical use interface. It was found that despite an estimated reforestation of 10,0727 ± 3480 ha (95% confidence interval), the combined rate of forest and savannah loss amounted to 56,271 ± 9405 ha (representing a 16% loss of the forestlands present in 2001), resulting in a rather sharp net loss of forestlands in the study area. These dynamics had not been estimated prior to this study, and the results will provide useful information for decision making pertaining to natural resources management, land management planning, and the implementation of the United Nations Collaborative Programme on Reducing Emissions from Deforestation and Forest Degradation in Developing Countries (UN-REDD).     

南极大陆沿岸地面臭氧损耗事件的研究

利用南极大陆沿岸中山站2008-2013年的地面臭氧连续观测数据和相关资料,对地面臭氧损耗事件（ODE）进行研究。结果显示,春季南极中山站常发生臭氧损耗事件。在该事件发生期间,气象要素有明显的突变过程,包括气温明显下降,风向由偏东风转变为偏北风,风速随之下降。来自海冰区的偏北风增多,风速很小,使臭氧浓度维持在较低水平。地面臭氧损耗事件主要与南极沿岸海冰区的活性溴（BrO）浓度有关。春季南极大陆沿岸海冰冻融过程中形成的冰间水道和冰间湖,在低温的作用下会再次冻结,形成薄冰和霜花。卫星资料能够观测到薄冰区释放的活化海盐溴高浓度区,活性溴与臭氧发生化学反应形成地面臭氧损耗事件。臭氧损耗现象是在未受到人为影响的自然状态下发生的,与中高纬度地区光化学反应导致臭氧消耗有所不同。      

区域地球化学样品分析质量管理计算机控制

使用通用的Microsoft Office系统中的Excel软件,根据不同项目及不同元素的内检质量和一级标准物质质量,判断分析测试质量。对区域地球化学样品分析测试质量进行计算机及局域网质量控制,利用Access工具建立数据库,编制一级标准物质质量控制表、密码检查质量控制表,制作质量监控图及打印检测报告等质量监控体系,实现对化探样品分析数据质量的管理。     

How access to Maine⬢s fisheries has changed over a quarter century: The cumulative effects of licensing on resilience

We describe how the evolution of the licensing system for commercial fisheries in Maine has progressively limited the ability of both fishers and the State to respond to changing environmental circumstances. Over the twenty-five year period from 1990 to 2014 new licenses were created at the rate of about 0.6 per year. The changes that have occurred have not been the result of a strategic policy agenda that was set to decrease fishers⬢ access, but rather the consequence of multiple decades of policy interventions that have sought to improve the socioeconomic and ecological productivity of individual fisheries. However, the cumulative effect has limited the flexibility of individual fishers and created strong economic interests that are incompatible with shifts towards ecosystem-based management. We use this finding to contribute to the literature on resilience, with a specific focus on the relationship between adaptive management and sustainability.     

海藻光合作用测定新方法——海水流通式测定法

新测定方法采用开放式测定系统。测定时，海水不断地流过海藻，使其周围的环境与在海中相似，避免了传统封闭式测定系统中的“瓶效应”。这种新方法根据海水的流量、流入与注出海经水中溶解氧浓度的差以及管内海藻的生物量算出光合作用速度，具有简便、可靠以及能够测定个体较大海藻的优点。