保险系统中的一个损失分布模型

基于保险人数为随机变量、每个被保险人的平均损失费各不相同时，导出被保险人总损失费的分布，拓展了文[2]的结果。     

内蒙古朝鲜族手指指毛的分布

调查了内蒙古兴安盟朝鲜族１０～２５岁学生５４７人（男２７６、女２７１）的手指指毛分布．结果表明，近侧指节生有指毛，中间指节除拇抬外，不生指毛，远侧指节无指毛．男女两性间指毛的出现率无明显差异，左右手指毛分布基本对称．     

一种基于FTU的馈线自动化系统

本文介绍了一种基于FTU（现场终端装置）的馈线自动化,探讨了馈线自动化的主要功能、实施的先决条件：并就一次设备、控制箱（FTU）、通信系统、FA控制主站及SACDA（配电管理系统）主站等五个层次讨论了基于FTU馈线自动化系统的构成,同时介绍了基于FTU模式下的故障处理,指出馈线自动化是提高配电网络电能质量、供电可靠性的有效手段。     

Spatiotemporal pattern and regional characteristics of visibility in China during 1976–2010

Degradation in visibility occurs extensively across China,creating the urgent need to better understand visibility patterns and characteristics in China.Using daily observation data from the U.S.National Climatic Data Center(NCDC)during 1976–2010,the spatial distribution and temporal trends of visibility in China,as well as seasonal and regional characteristics,were determined.The distribution of visibility was characterized by a longitudinal gradient between west and east China.The northwest of China generally experienced consistent high visibility of[20 km,while central and eastern China experienced visibility degradation and increase in haziness.The 133stations with significant downward trends in visibility were clustered around central-east China and the average reduction rate was-1.65 km/decade(from 18.5 km).The96 stations with increasing trends of visibility were mostly on the Qinghai–Tibet Plateau and Xinjiang and were closely related to a reduction in local sand storms.The average visibility in 12 key regions in China varied between9.9–17.8 km(except for 23.9 km in Urumqi),which was lower than the national average of 18.7 km.The Taiyuan–Hohhot,Guanzhong,Yangtze River Delta,Pearl River Delta and Fuzhou–Xiamen areas all encountered significant decreases in visibility,while minor increases were observed in Beijing–Tianjin–Hebei and the Cheng-Yu region.At most stations,the worst visibility was measured in winter,but the season with best visibility varied between regions.A comparison of visibility trends with the emission trends of various pollutants revealed that SO2emissions dominated the visibility degradation in eastern Chinawith NOxand volatile organic compounds playing ascending roles during the 2000s.     

The spatial distribution pattern of landslides triggered by the 20 April 2013 Lushan earthquake of China and its implication to identification of the seismogenic fault

After the 20 April 2013 Lushan MS6.6 earthquake occurred,investigation and identification of the seismogenic fault for this event have become a focused and debatable issue.This work prepared an initial landslide inventory map related to the Lushan earthquake based on field investigations and visual interpretation of high-resolution aerial photographs and provided evidence for solving the issue aforementioned.The analysis of three landslide-density profiles perpendicular to strike direction of the probable seismogenic fault shows that many landslides occurred on the footwall of the Shuangshi–Dachuan fault(SDF),without sudden change of landslide density near the fault.Very few landslides were detected near the Dayi fault(DF)and also no change of landslide density there.While obvious sudden change of landslide density appeared about 1–2 km from the northwest to the western Shangli fault(WSF),and the landslide density on the hanging wall of the fault is obviously higher than that of on the footwall.Therefore,we infer that the seismogenic fault for the Lushan earthquake is neither the SDF nor the DF,rather probably the WSF located between these two faults,which is an evident linear trace on the earth surface.Meanwhile,the coseismic slip did not propagate upward to the ground,implying the Lushan earthquake was spawned by a blind-thrust-fault beneath the WSF.     

Spatial epidemiology of networked metapopulation: an overview

An emerging disease is one infectious epidemic caused by a newly transmissible pathogen, which has either appeared for the first time or already existed in human populations, having the capacity to increase rapidly in incidence as well as geographic range. Adapting to human immune system, emerging diseases may trigger large-scale pandemic spreading, such as the transnational spreading of SARS, the global outbreak of A（H1N1）, and the recent potential invasion of avian influenza A（H7N9）. To study the dynamics mediating the transmission of emerging dis- eases, spatial epidemiology of networked metapopulation provides a valuable modeling framework, which takes spatially distributed factors into consideration. This review elaborates the latest progresses on the spatial metapopula- tion dynamics, discusses empirical and theoretical findings that verify the validity of networked metapopulations, and the sketches application in evaluating the effectiveness of disease intervention strategies as well.     

赣南苏区可利用土地资源空间分布特征分析

可利用土地资源是评价一个地区剩余或潜在的土地对未来人口集聚、工业化和城镇化发展的承载能力,其数量和空间分布对该地区的经济发展后劲、发展潜力及环境保护具有重要的影响。根据2011年Landsat TM遥感影像人机交互判读解译江西省土地利用数据并结合江西省DEM数据,分析得出江西省赣南苏区可利用土地资源空间分布特征,结果表明:(1)赣南苏区可利用土地资源总量5 845.02 km2,占该区土地总面积的14.9%;(2)各县(市、区)域之间可利用土地资源数量和空间分布不均衡;(3)经济发展较好并且人口密集地区,土地的开发利用程度高,可利用土地资源少,反之则较多。     

江西九连山自然保护区常绿阔叶林的结构特征

基于线路和样方调查的基础上分析了九连山国家级自然保护区常绿阔叶林的结构特征。优势科主要为壳斗科（Fagaceae）、樟科（Lauraceae）、山茶科（Theaceae）、安息香科（Styracaceae）、杜鹃花科（E6caceae）、木兰科（Magnolicceae）、槭树科（Aceraceae）、枫香科（Altingiaceae）、冬青科（Aquifoliaceae）、厚皮香科（Temstroemiaceae）、柿树科（Ebenaceae）、桃金娘科（Myrtaceae）、杜英科（Elaeocarpaceae）等科,优势树种也以相应的优势科属树种为主。调查中,胸径DBH≥3cm的乔木个体密度1808株／hm^2;优势层相对较高大,平均高度达到11．5m;乔木垂直分化较明显,树种水平分布不均。九连山现状植被是天然原生植被、次生植被和人工植被的混合体,并常见有阳性落叶树如枫香（Liquidambar,formosana）、拟赤杨（Alniphyllum fortunei）、光皮桦（Betula luminifera）等侵入林窗,形成常绿与落叶阔叶树的混交林。     

估计跳频信号参数的多窗口迭代平滑伪WVD新算法

采用时-频分析方法获取跳频信号的瞬时频率、跳周期、跳频图案等主要参数,在短时傅立叶变换、Wigner-Ville分布等传统时-频分析算法均无法达到抑制噪声和实时参数检测的情况下,提出一种能适应跳频信号速率变化的多窗口迭代平滑伪Wigner-Ville分布(SPWVD)算法来进行跳频信号参数的实时估计。仿真结果表明,该算法在较低信噪比(-8 dB)的情况下也具有良好的实时估计效果。     

石大夫新考——以鲁中山区为例

民俗学界多数专家学者认为,石大夫是石敢当的一种变异形式。近年在田野调查中,发现石大夫与石敢当同属于灵石崇拜,但它似乎有着自身的历史源流。《章丘县志》及鲁中山区各地的田野调查,为研究石大夫信仰活动提供了新的佐证。