A NEW BIOGENIC SULFIDE CHEMICAL SENSOR FOR MARINE ENVIRONMENTAL MONITORING AND SURVEY

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体应变地震波最大振幅与地震震级和震中距的统计关系探讨

Based on the body strain record of Tiantanghe station from 2008 to 2014,we make a statistical analysis of the relationship between the maximum amplitude of the body strain record and the surface-wave magnitude,epicenter distance of the earthquakes,which occurred in the Chinese mainland and its surrounding areas with MS≥6. 0 and the rest of the world with MS≥7. 0. According to statistical results,we propose a statistical formula between the surface-wave magnitude of earthquake and the maximum amplitude of the body strain record,the epicenter distance: M_S~*= 0. 37 ln A_max+ 0. 57 ln D + 0. 07. We can also derive a theoretical estimation formula for the maximum amplitude: A_max=e~(2. 7(M_S~*-0. 07))D~(-1. 54). This demonstrates that the maximum amplitude of the body strain record increases exponentially with the increase of the surface-wave magnitude, and decreases with the increase of the epicenter distance,and shows a negative correlation with their product. We further discuss the necessity of adding instruments with high frequency sampling to earthquake monitoring, and dicuss the prospects for precise earthquake prediction in future.     

基于网络药理学-分子对接探索大黄牡丹汤治疗大肠癌的作用机制

目的：利用网络药理学-分子对接技术探索经方大黄牡丹汤治疗大肠癌的作用机制。方法：通过TCMSP、TCMID数据库获得大黄牡丹汤药物成分,通过PubChem、Swisstarget prediction数据库获得药物成分对应靶点,分析GSE113513芯片获得差异基因,随即获取大黄牡丹汤与大肠癌的共同靶点。利用R、Cytoscape、Autodock软件进行PPI、GO、KEGG、分子对接等分析。结果：获得大黄牡丹汤靶点561个,大肠癌差异基因1227个,共同靶点71个。共同靶点的通路富集分析显示主要与PPAR、p53等信号通路相关,Reactome机制分析显示大黄牡丹汤治疗大肠癌主要通过影响信号转导、免疫系统、疾病等产生作用,分子对接结果显示大肠癌核心靶点与大黄牡丹汤主要成分亲和力较好,能够有效自由结合。结论：经方大黄牡丹汤可通过多层次、多途径、多靶点发挥对大肠癌的治疗作用。     

四川理县蒲溪乡边坡变形监测及降雨影响分析

四川省阿坝州理县蒲溪乡河坝村后山边坡属于老滑坡区,2014年6月以来,出现地表拉裂、鼓胀、下挫及挡墙剪切错断等现象,并不断加剧恶化,严重威胁当地民众安全。为预防滑坡灾害,当地政府在边坡前修建防护坝。为评估该防护工程效果,获取6个新建GNSS观测点实时变形观测数据,运用灰色关联法,明确降水变率是造成该区形变的主要因素,进而采用边坡变形量行业常用GM(1, 1)模型,预测可能的边坡形变量,并与GNSS观测点实测值对比,结果表明,在防护坝建成1年7个月后,边坡变形速率逐渐减缓,防护工程治理效果显现。     

伊朗地震台网现状分析

通过中伊双方合作交流，详细考察了伊朗的地震台网。伊朗现建有4类台网:地震遥测台网、国家地震台网、强震台网及水库诱发地震台网。这些台网中高性能宽频带地震仪数量不足，使得地震定位精度不高;且4类台网分属不同机构，在一定程度上限制了伊朗的地震监测能力。     

基于人工神经网络的喀斯特地区水资源承载力综合评价——以贵州省为例

运用BP网络对贵州喀斯特地区水资源承载力进行综合评价,并与灰色关联投影法评价结果进行对比。结果表明,两种方法的评价结果整体差别不大,但安顺市和铜仁地区的承载力差别很大。神经网络法所得结果,铜仁地区水资源开发利用潜力最大,而安顺市则很小,仅高于贵阳市;但灰色关联投影法所得结果,铜仁地区的水资源承载力却比安顺市低很多。通过与前人研究结果比较,BP网络的评价结果更加符合实际情况。应用Kohonen网络进行分析,结果表明水资源总量和经济发展水平是影响贵州各地区水资源承载力的主要因素;此外,人口对遵义市的水资源承载力也有较大的影响,铜仁和毕节地区受喀斯特的影响较其他地区显著。      

淮北新矿区新生界底部松散沉积物沉积特征及水理性质

分析了淮北新矿区新生界底部松散层沉积物沉积特征及水理性质,尤其是四含的岩性组合结构。在对各级粒径之间的相互掺杂进行统计的同时,对岩层的厚度,物理性质,水理性质,矿物形态及含量进行进一步的研究。得出结论：淮北煤田新矿区松散沉积物第四含水层是以下部合粘性土砂砾层和上部夹砂层的粘性土段组成。分布较稳定,但厚度和岩性有较大变化,主要受古地形和古地理位置的控制。各种粒级的沉积物相互掺杂,颗粒分布不均一,砂性土的有效粒径与其本身定名粒级相比低2～3个粒级,其透水性与比其低2个粒级沉积物相当。四含不仅具有隔水性,而且有较强的持水性。     

网络RTK几种常用技术的比较

详细介绍了网络RTK技术的基本原理,并对目前的主要网络RTK技术进行了分析比较,最后论述了应用网络RTK技术存在的一些问题和未来的发展趋势.     

地下水观测网的若干问题与基于信息熵的研究方法

观测站点分布的任意性、随意性和层次不清以及观测数据的冗余性等是中国地下水观测网普遍存在的问题 ,这些问题制约着观测网提供可靠和有效数据信息的能力。文章以河北平原地下水观测网为例 ,分析了观测网几个问题的表现和原因 ,并对国内外观测网优化设计的指导思想、技术方法的现状和进展作了简要介绍。在参考大量国内外研究成果的基础上 ,主要介绍了基于信息熵原理研究观测网优化设计的方法 ,包括基本概念、原理和解决观测孔层次分类、信息冗余以及空间优化布局的技术思想。笔者认为 ,信息熵方法是一种能够评价地下水观测网信息 (而不是数据 )收集能力和优化观测网布局的很具发展潜力的技术方法。     

Summer light‐trap catches of adult Trichoptera in hill‐country catchments of contrasting land use,Waikato, New Zealand

The distribution of adult Trichoptera in light traps was investigated alongside nine streams draining catchments under native forest, pine forest, or pasture near Hamilton, Waikato, New Zealand. The aim of the study was to determine the relationship between abundance, taxonomic richness, and community composition with respect to land use during summer, and to evaluate the use of adult Trichoptera compared with benthic invertebrates as potential bio‐indicators of the effectiveness of land‐management changes. Adult Trichoptera faunas alongside the native streams were dominated by Hydrobiosidae, Conoesucidae, and Helicopsychidae (each >10% of total Trichoptera numbers for at least two of the three sites), whereas Leptoceridae, Oeconescidae, and Hydrobiosidae were relatively abundant alongside at least two of the pine sites. Adult Trichoptera faunas at the pasture sites were strongly dominated by Hydroptilidae which made up 47–85% of numbers caught at all sites. The mean number of individuals and taxa caught in light traps increased from November to January and then declined in February for all land‐use types. Overall, total numbers and taxonomic richness of adult Trichoptera were significantly lower at the pine sites compared to the pasture or native sites. TWINSPAN classification of benthic invertebrates collected in November clearly differentiated sites based on land use for presence/absence and percentage abundance data. A similar pattern was evident for most sites when adult Trichoptera faunas were used for the four sampling dates combined, suggesting that light trapping has potential as a tool for bio‐monitoring.