浅议质量管理体系和质量控制在测绘生产中的应用     

牛芝香  范兰  董文君  郭喜绒 《测绘标准化》2011,(4):44-46

质量管理体系是在质量方面指挥和控制组织的管理体系,致力于实现与质量目标有关的结果。为了使产品质量符合要求,必须建立包括作业人员、部门和单位在内的质量管理体系和一系列的质量控制流程。  相似文献   

从山西地震谣传事件看地方政府的公关危机     

王凤  袁志祥 《高原地震》2011,23(2):60-62

根据2010年初发生在山西省的地震谣言事件,分析了在此次事件中存在的公关危机处理问题,并提出相应的危机处理建议.  相似文献   

中扬子区构造特征及勘探方向建议   总被引：11，自引：3，他引：8  

付宜兴  张萍  李志祥  杨振武  刘新民  王韶华 《大地构造与成矿学》2007,31(3):308-314

中扬子区经历了印支-喜山期四个构造变形、变位发展阶段:印支运动结束海相沉积,并形成了黄陵、潜江、洪湖古隆起,早燕山期全区挤压,奠定了本区中、古生界的基本构造格局,晚燕山期,构造负反转,中、古生界构造发生叠加改造,喜山期,构造正反转,总体表现为隆升挤压。印支期以来多期构造运动的叠加改造,形成了南、北两个弧形构造体系,平面上构造展布特征具有明显的差异性:北部(大洪山)弧形构造系呈现南北分带、东西分块的构造格局,南部弧形构造系东西差异明显,东部具双重结构特征,西部为"隔槽式"构造格局。近期应以江汉平原南部、湘鄂西区桑植石门复向斜为勘探重点,同时围绕深化地质认识,解剖区域结构,加强地震攻关,积极准备中扬子南、北逆冲推覆带勘探。  相似文献   

Spatio-temporal variations in precipitation on the Huang-Huai-Hai Plain from 1963 to 2012     

Yanan Li  Zhixiang Xie  Yaochen Qin  Shenghui Zhou 《Journal of Earth System Science》2018,127(7):101

Spatio-temporal variations in precipitation are affecting agricultural production in China in the context of climate change. Based on daily precipitation data from 63 national meteorological stations on the Huang-Huai-Hai Plain from 1963 to 2012, this paper analysed the spatio-temporal variations in precipitation in terms of precipitation days and intensity, using spatial interpolation, linear trend estimation and wavelet analysis. The results indicated that: (i) from 1963 to 2012, the number of annual precipitation days and intensity decreased gradually from the southeast to the northwest. Additionally, the distribution of the extreme precipitation index was similar to that of the annual precipitation index; (ii) the number of annual precipitation days and heavy precipitation days gradually decreased, while precipitation intensity and extreme precipitation days and extreme rainfall intensity remained relatively stable or decreased. The spatial patterns of annual variation trends were considerably different. The annual precipitation days and intensity trends are consistent with the overall trend, while that of the extreme rainfall index in some regions differs from the overall trend; (iii) the precipitation index displayed different periodic oscillations during the period, and the precipitation index values differed at different time scales. However, all the precipitation index values exhibited a 28-yr oscillation.  相似文献   

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魏二虎  殷志祥 《大地测量与地球动力学》2014,34(3):59-62

????????“???”????????????????????λ?????????????й?VLBI????????????VLBI??SBI????????????????????????????????÷?????????????????λ?????????????????????????λ??????????Ч??????  相似文献   

基于遥感影像的鄱阳湖地形提取方法     

张龚泉  岳建平  刘胜男  王海龙  杨智翔  周航宇 《测绘通报》2022,(5):62-66+73

采用遥感影像进行湖底地形反演具有操作简单、处理周期短的优势。本文提出了一种基于克里金法的湖底地形反演方法,以鄱阳湖为研究对象,通过分析周边8个水位站的空间位置与水位间的相关性,获取湖区边界水位变化趋势,利用克里金法反演湖区边界点的水位,将边界点的水位作为高程点进行湖底地形反演,并用实测湖底地形数据验证反演方法的可靠性。研究结果表明,通过克里金插值法反演得到的湖底地形,交叉验证的误差标准平均值在0.2 m以内;地形反演平均绝对误差在1 m以内,说明该方法可用于湖底地形反演且反演精度较高。  相似文献   

改性膨胀土路堤填筑含水量优化试验研究   总被引：13，自引：5，他引：8  

李志祥  胡瑞林  熊野生  户晓荣  宋继宏 《工程地质学报》2005,13(1):113-116

在控制含水量的前提下,对分别掺入不同量石灰、不同量水泥改性膨胀土试件进行强度和膨胀量试验,得到不同含 水量及不同石灰(水泥)掺量对改性膨胀土强度和膨胀性的影响,通过对实验所得数据的分析,找出含水量和掺石灰(水泥)剂 量的最佳融合点,并据此对膨胀土路堤填料的改性施工提出了一些有益的建议。  相似文献   

A SEASONAL INFLUENZA THEORY AND MATHEMATICAL MODEL INCORPORATING METEOROLOGICAL AND SOCIO- BEHAVIORAL FACTORS     

周智翔 《热带气象学报(英文版)》2009,15(1):1-12

On the basis of a comprehensive literature review and data analysis of global influenza surveillance, a transmission theory based numerical model is developed to understand the causative factors of influenza seasonality and the biodynamical mechanisms of seasonal flu. The model is applied to simulate the seasonality and weekly activity of influenza in different areas across all continents and climate zones around the world. Model solution and the good matches between model output and actual influenza indexes affirm that influenza activity is highly auto-correlative and relies on determinants of a broad spectrum. Internal dynamic resonance; variations of meteorological elements (solar radiation, precipitation and dewpoint); socio-behavioral influences and herd immunity to circulating strains prove to be the critical explanatory factors of the seasonality and weekly activity of influenza. In all climate regions, influenza activity is proportional to the exponential of the number of days with precipitation and to the negative exponential of quarter power of sunny hours. Influenza activity is a negative exponential function of dewpoint in temperate and arctic regions and an exponential function of the absolute deviation of dewpoint from its annual mean in the tropics. Epidemics of seasonal influenza could be deemed as the consequence of the dynamic resonance and interactions of determinants. Early interventions (such as opportune vaccination, prompt social distancing, and maintaining incidence well below a baseline) are key to the control and prevention of seasonal influenza. Moderate amount of sunlight exposure or Vitamin D supplementation during rainy and short-day photoperiod seasons, more outdoor activities, and appropriate indoor dewpoint deserve great attention in influenza prevention. To a considerable degree, the study reveals the mechanism of influenza seasonality, demonstrating a potential for influenza activity projection. The concept and algorithm can be explored for further applications.  相似文献   

客运专线特大桥沉降变形监测研究     

牛海鹏  谭志祥  邓喀中  郭仓 《测绘通报》2012,(7):65-67,104

为获得有效的客运专线无砟轨道特大桥沉降数据,为客运专线建设中的无砟轨道铺设工作提供依据,在对客运专线特大桥沉降变形观测特征研究的基础上,结合实例详述该特大桥沉降变形测量的布点及观测方法,并编制了三点法沉降评估的通用程序,通过对沉降数据的处理与分析得出一些特大桥墩身沉降及梁体徐变的规律,为今后客运专线的施工管理和科学研究等提供可靠的资料。  相似文献   

侵蚀环境中碱渣-矿渣固化淤泥的力学性质          下载免费PDF全文

何俊  栗志翔  石小康  王小琦 《水文地质工程地质》2019,(6):83-89

为扩展碱渣和矿渣等工业固体废弃物的资源化利用途径,以碱渣和矿渣为固化剂对淤泥进行固化处理,开展侵蚀环境条件下固化淤泥试样的表观和无侧限抗压强度等性质试验研究,探讨侵蚀溶液对固化淤泥的作用机理。研究表明,自来水和30 g/L的NaCl溶液浸泡时,标准养护28 d的固化土表面完整性较好,试样密度随浸泡时间的增加而增大;15 g/L的MgSO4溶液和NaCl-MgSO4混合溶液浸泡时,固化土表面受到明显侵蚀,随着浸泡时间的增加,侵蚀程度逐渐加深,试样体积、质量和密度呈减小趋势。当浸泡时间从28 d增至42 d时,自来水浸泡试样的无侧限抗压强度增大,溶液浸泡试样的无侧限抗压强度基本保持不变;浸泡导致试样的延性增强,抵抗变形的能力减弱。在浸泡时间相同的条件下,MgSO4和NaCl-MgSO4混合溶液浸泡时固化土强度约为自来水和NaCl溶液浸泡时强度的一半,抵抗变形的能力也较弱。钙矾石、水化氯铝酸钙等水化产物的形成使碱渣-矿渣固化淤泥抗NaCl侵蚀能力强,但由于侵蚀作用形成微观裂隙及疏松结构导致其抗MgSO4侵蚀能力较弱。  相似文献