基于GPRS的远程地震监控系统的设计

采用系统集成技术,设计了基于GPRS DTU的强振数据采集终端,并通过Internet在远程上位机完成数据分析处理,该地震监测系统不需要敷设传感器专用电缆,具有布点方便、安装和维护简单、低成本等的特点。     

基于MEMS加速度计的强振动记录黑匣子的设计

设计基于MEMS加速度传感器的一种强震记录黑匣子,采用SOC系列C8051F005型单片机对MEMS加速度传感器的输出信号进行A/D转换,记录该设备安装点位所经受的强振加速度值,并通过LCD16032显示一分钟内的振动加速度峰值.该系统具有体积小、安装与操作方便、免维护等特性.     

The roles of serine protease, intracellular and extracellular phenoloxidase in activation of prophenoloxidase system, and characterization of phenoloxidase from shrimp haemocytes induced by lipopolysaccharide or dopamine

We investigated the effects of lipopolysaccharide(LPS) and dopamine(DA) on the activation of the prophenoloxidase(proPO) system of Litopenaeus vannamei.LPS and DA were shown with a negative dose-dependent effect on hyalne cells(HC),semi-granular cells(SGC),large granular cells(LGC),and total haemocyte count(THC).When haemocytes were treated with LPS or DA,serine proteinase activity and intracellular phenoloxidase(PO) activity were significantly reduced,but extracellular PO activity increased significantly.These findings indicated that the reduction in haemocyte counts was mainly because of the degranulation and activation of the proPO system from semi-granule and large granule cells.The PKC inhibitor,chelerythrine,and the TPK inhibitor,genistein,had an inhibitory effect on extracellular PO activity,while serine proteinase and intracellular PO activity increased.This suggests that the LPS and DA induce the activation of proPO in haemocytes via PKC and TPK-related signaling pathways,but serine proteinase may be activated only by PKC,as the genistein effects were not statistically significant.Electrophoresis analysis revealed that POs induced by LPS or DA have the same molecular mass and high diphenolase activity.Two PO bands at 526 kDa and 272 kDa were observed in PAGE,while in the haemocyte lysate supernatant(HLS),only a 272-kDa band was observed.This band was resolved after SDS-PAGE under non-reducing and reducing conditions into two groups of POs,166 kDa and 126 kDa,and 78.1 kDa and 73.6 kDa,respectively,suggesting that PO in L.vannamei is an oligomer,which may have different compositions intra-and extracellularly.     

Using Statistical Learning Algorithms in Regional Landslide Susceptibility Zonation with Limited Landslide Field Data

Regional Landslide Susceptibility Zonation(LSZ) is always challenged by the available amount of field data, especially in southwestern China where large mountainous areas and limited field information coincide. Statistical learning algorithms are believed to be superior to traditional statistical algorithms for their data adaptability. The aim of the paper is to evaluate how statistical learning algorithms perform on regional LSZ with limited field data. The focus is on three statistical learning algorithms, Logistic Regression(LR), Artificial Neural Networks(ANN) and Support Vector Machine(SVM). Hanzhong city, a landslide prone area in southwestern China is taken as a study case. Nine environmental factors are selected as inputs. The accuracies of the resulting LSZ maps are evaluated through landslide density analysis(LDA), receiver operating characteristic(ROC) curves and Kappa index statistics. The dependence of the algorithm on the size of field samples is examined by varying the sizes of the training set. The SVM has proven to be the most accurate and the most stable algorithm at small training set sizes and on all known landslide sizes. The accuracy of SVM shows a steadilyincreasing trend and reaches a high level at a small size of the training set, while accuracies of LR and ANN algorithms show distinct fluctuations. The geomorphological interpretations confirm the strength of SVM on all landslide sizes. Our results show that the strengths of SVM in generalization capability and model robustness make it an appropriate and efficient tool for regional LSZ with limited landslide field samples.     

利用Cryosat-2 SAR模式数据确定北冰洋海平面模型

围绕Cryosat-2卫星SAR模式测高数据处理方法展开研究,利用决策树算法确定冰间水道观测值提取的参数和阈值,进而建立北冰洋海冰覆盖海域的海平面模型UST-CS2。结果表明,UST-CS2与DTU21海平面模型具有较高的一致性。ICESat-2激光测高数据的验证结果表明,UST-CS2的标准差为10.72 cm,与DTU21等模型精度基本持平,证明该模型具有可靠性。     

基于CNGI的政府地理信息系统建设与应用技术研究

介绍了我国首个基于CNGI的地理信息系统移植和建设情况,针对CNGI与IPv6的技术特点开展了新的地理信息应用技术研究,并以政府地理信息系统"地学之窗"为基础开发了GIS应用示范系统,为下-代网络环境下地理信息系统技术开发和应用建设奠定了一系列技术基础.     

Single nucleotide polymorphisms in intron 1 and intron 2 of Larimichthys crocea growth hormone gene are correlated with growth traits

The growth hormone gene (GH) affects animal growth and is a potential target for genetic studies of variation related to growth traits. In this study, we analyzed single nucleotide polymorphisms (SNPs) in GH intron regions and their associations with growth traits in large yellow croaker, Larimichthys crocea, from Zhejiang and Fujian stocks. The results of PCR-single strand conformation polymorphism showed two haplotypes of intron 1, named AA and AB genotypes, in Zhejiang stock. AB exhibited an SNP at position 196 (G A) that was negatively correlated with body height and positively correlated with standard length/body height (P 0.05). Two different genotypes, CC and CD, were identified in intron 2 in Fujian stock, with CD showing an SNP at position 692 (T C). The CD genotype had a significantly positive correlation with both weight and total length (P 0.01). These basic data highlight the potential for using GH as a genetic marker of fish growth in marker assisted selection.     

Production of DMS and DMSP in different physiological stages and salinity conditions in two marine algae

Dimethylsulfide(DMS) and dimethylsulfoniopropionate(DMSP) production by Scrippsiella trochoidea and Prorocentrum minimum was investigated to characterize the effects of physiological stage and salinity on DMS and DMSP pools of these two marine phytoplankton species.Axenic laboratory cultures of the two marine algae were tested for DMSP production and its conversion into DMS.The results demonstrated that both algal species could produce DMS,but the average concentration of DMS per cell in S.trochoidea(12.63 fmol/L) was about six times that in P.minimum(2.01 fmol/L).DMS and DMSP concentrations in algal cultures varied significantly at different growth stages,with high release during the late stationary growth phase and the senescent phase.DMS production induced by three salinities(22,28,34) showed that the DMS concentrations per cell in the two algal cultures increased with increasing salinity,which might result from intra-cellular DMSP up-regulation with the change of osmotic stress.Our study specifies the distinctive contributions of different physiological stages of marine phytoplankton on DMSP and DMS production,and clarifies the influence of salinity conditions on the release of DMS and DMSP.As S.trochoidea and P.minimum are harmful algal bloom species with high DMS production,they might play an additional significant role in the sulfur cycle when a red tide occurs.     

Perception and attitudes of local communities towards wild elephant-related problems and conservation in Xishuangbanna,southwestern China

The problem of wild elephants, or human-elephant conflict (HEC), influences the daily life of local communities and hinders the conservation of wild elephants.The perception and attitudes of local communities who inhabited the frontiers between human activities and wild elephant movement are important to the mitigation of the HEC and conservation of wild elephants. To analyze the perception and attitudes of local communities, the Participatory Rural Appraisal (PRA) was used in the investigation of 423 interviewees from 22 villages in Xishuangbanna from July 2009 to February 2010. The results indicated that local communities had their views on the elephant-related problems. In field survey, we found that 66.5% of interviewees were willing to support, participate in, and assist in the conservation of wild elephants;33.5% of interviewees were opposed or indifferent to such conservation, because their livelihoods and even their lives were endangered by wild elephants. These views and attitudes were influenced by local communities′perception of HEC, education level, gender and self-interest. Therefore, it is necessary to analyze the diverse views among local communities and balance profits and costs in addressing HEC.     

德国迁都柏林过程中的地球信息技术─-祝贺陈述彭院士2000年2月14日八十华诞生日快乐

联邦德国议会1991年决定, 议会与政府核心部门在2000年前从波恩迁回柏林 ,波恩保留联邦行政管理中心的功能。为了按时准确地规划和完成落实迁都建设工程,在柏林建设国家行政办公设施和国家工作人员生活居住设施,解决波恩地区因国家机关迁离而遭受的损失,参加建设的许多部门应用了地球信息技术。文中介绍了“柏林房地产信息系统”,“联邦议会与政府核心区建设信息系统”,“物业管理信息系统”,“波恩地区经济地理信息系统”以及地球信息技术在交通和环境管理中的应用。     

应用TEQC对湖北省陆态网络连续站的观测数据进行质量分析

利用TEQC软件的数据质量检核模块对湖北省陆态网GPS连续站观测数据进行质量分析,得出湖北省陆态网GPS连续站各项指标均满足中国地壳运动观测技术规程的要求.     

Development of an Instant Correction and Display System of Numerical Weather Prediction Products in China

This paper presents the development of numerical prediction products （NPP） correction and display system （NPPCDS） for rapid and effective post-processing and displaying of the T213 NPP （numerical prediction products of the medium range numerical weather prediction spectral model T213L31） through instant correction method. The NPPCDS consists of two modules： an automatic correction module and a graphical display module. The automatic correction module automatically corrects the T213 NPP at regularly scheduled time intervals, while the graphical display module interacts with users to display the T213 NPP and its correction results. The system helps forecasters extract the most relevant information at a quick glance without extensive post-processing. It is simple, easy to use, and computationally efficient, and has been running stably at Huludao Meteorological Bureau in Liaoning Province of China for the past three years. Because of its low computational costs, it is particularly useful for meteorological departments that lack advanced computing capacity and still need to make short-range weather forecasting.     

虚拟GIS数据模型的设计及其主动式面向对象数据库系统的实现

本文首先在分析地学虚拟环境和虚拟地理信息系统的同时 ,指出当前虚拟地理信息系统在数据模型上的不足 ;然后具体介绍了我们设计的虚拟地理信息系统数据模型 ,在该数据模型中通过引入结构对象 ,支持地理数据在空间数据库中的管理和在地学虚拟环境中表达 ;同时介绍了该数据模型基于主动式面向对象数据库的实现 ,并在其支持下的地理对象中引入了对象事件属性 ;最后文中给出系统应用示例图。     

空间信息要素模型可视化的设计模式与应用

GIS系统的实现是一个相当复杂的过程,分层次模块化的方法被广泛采用,同时应用设计模式更加简单方便地重复使用成功的设计和体系结构,更有利于GIS系统的开发和重构。本文通过对描述地理信息系统空间信息模型中要素模型的几何体结构分析,充分运用和组合各种设计模式,在要素可视化设计和实现中,探讨要素组织采用组合模式与访问者模式相结合的形式,实现异构几何体的聚集访问;要素可视化的实现总体上采用合成模式与绘制采用策略模式相结合的形式,实现要素与绘制的有机分离及各种绘制形式的充分支持。这种结构的好处在于不但能很方便地实现Open GIS中有关要素几何体的抽象规范和相应的实现规范,而且能使系统结构清晰、模块分明,组织自然,有利于系统的开发、维护和扩展。     

海量城市空间数据资源汇集模块的设计与实现

研究了OGSA-DAI网格中间件技术,设计了一个基于OGSA-DAI的海量城市空间数据资源汇集模块,实现了城市地理空间信息的共享应用.本模块的创新之处在于扩展了OGSA-DAI的数据资源,实现网格环境下多源异构空间数据的访问与集成,对相关研发工作的开展起到了很好的借鉴作用.     

基于层次分析法的路段属性求权方法

最优路径搜索功能是车载导航系统的路径规划模块的核心功能之一。车辆在道路路段上的旅行支出是综合考虑道路的各种属性,通过加权、无量纲化等计算后的结果。利用层次分析法对道路的各种属性加权,给出了不同类型属性的无量纲化的标准函数。     

全球油气地质信息共享系统

 为了充分展示全球油气地质综合研究的数据资料,提供数据库对外信息服务的窗口,基于ArcGIS Server技术、Visual studio.NET 开发平台和ORACLE数据库管理系统,构建了B/S结构的全球油气地质信息共享系统。本系统是WebGIS应用平台,提供了信息发布、地图浏览、图形查询、空间分析、专题制图等功能,以图形、文字、图表等方式展示研究区的基础地理、基础地质、油气地质、资源潜力、投资环境等方面的最新成果,为公众和研究人员提供了高效的信息访问途径,为国家油气资源管理和能源决策提供了可靠的信息支撑,实现了重要信息社会化共享的目标。文章简单介绍了ArcGIS Server,重点描述系统框架、数据分类和功能模块,旨在探讨ArcGIS Server的网络信息共享系统的设计与实现。     

利用PSoC实现频率计

频率计的设计以PSoC CY8C29466-24PVXI为核心,由内部模块与外部电路的组合成其硬件电路,软件设计采用C语言。设计包括信号处理、定时器计数及数据显示3个主要部分,可以实现对信号频率的测定。由于设计中采用了分频,而且在PSoC中定时器最多可以达32位,所以频率范围比8位的单片定时器测得要广。     

长输管道完整性管理GIS数据模型研究

随着我国长输管道建设规模的不断扩大,管道运营过程中出现的安全问题逐渐成为行业内部乃至整个国家和社会所关注的焦点。针对上述问题,业内专家提出的以G IS为其实现手段,对管道进行完整性管理,是目前解决管道运营中的安全问题可采用的一种较好的方法。采用完整性管理方法,首先需要对管道数据进行建模,把管道的设计资料、竣工资料、检测数据以及设备信息等统一的用空间数据库来管理。本文首先分析了目前国际上现有的多个管道数据模型,然后参考国际上管道完整性管理的理论与方法,同时结合国内管道完整性管理的实践经验,阐述了设计适合我国管道工业的长输管道数据模型的具体过程。在模型的应用上,主要体现在建立管道完整性管理信息系统。该系统充分利用了模型中提供的各类信息,在此基础上,集中开发了线路管理模块、风险/完整性评价模块、站场管理模块等。实践证明,本文提出的管道数据模型在我国管道完整性管理中具有很高的应用价值。     

1∶50000数字高程模型快速生产软件设计及应用

数字化地形图等高线法是目前生成DEM的一种有效方法,本文介绍了利用等高线作为数据源,在工程中大规模、批量化生产DEM时,DEM快速生产软件的设计思想以及开发过程中的主要技术等。该软件已申请专利,并成功应用于国家1∶50 000数据库更新工程DEM更新生产中,具有低成本、高效率、自动化等特点,取得了巨大的经济效益以及社会效益。