大型电子设备规范化维修     

王志武  张建敏 《气象科技》2013,41(5):791-795

大型电子设备维修难度大、进入门坎高,排障时间长、效率低,一直以来是用户所面临的实际问题.针对批量装备的大型电子设备,提出规范化维修的理论基础和一整套实现方法,详细地阐述了批量装备的大型电子设备的维修流程,给出了对应电子设备的分级资料库和案例专家库的建设方法,介绍了大型电子设备规范化维修排障的步骤过程、初步设计了故障组件或组件集合的脱机测试维修平台和故障仿真维修排障平台的结构,目的是为了能够解决这些实际问题.  相似文献   

Comparison of nominal and standardized catch per unit effort data in quantifying habitat suitability of skipjack tuna in the equatorial Pacific Ocean     

Cheng Zhou  Yuanyuan Hu  Jie Cao  Liuxiong Xu  Xuefang Wang  Rong Wan  Yu Xiao  Jiangfeng Zhu  Hao Tang 《海洋学报(英文版)》2022,41(3):1-2

In the western and central Pacific Ocean, upper strata waters exhibit highly dynamic oceanographic features under ENSO variability. This has been proved to be responsible for the dynamic change of both abundance and zonal distribution of skipjack tuna(Katsuwonus pelamis). Although causality has been suggested by researchers using physical–biological interaction models, cumulative evidence needs to be obtained and the tenability of assertion needs to be tested from an ecological habitat perspecti...  相似文献   

Effects of spatio-temporal and environmental factors on distribution and abundance of wintering anchovy Engraulis japonicus in central and southern Yellow Sea     

牛明香  金显仕  李显森  王俊 《中国海洋湖沼学报》2014,32(3):565-575

We investigated the spatio-temporal and environmental factors that affect the distribution and abundance of wintering anchovy and quantifi es the infl uences of these factors. Generalized additive models(GAMs) were developed to examine the variation in species distribution and abundance with a set of spatiotemporal and oceanographic factors, using data collected by bottom trawl surveys and remote sensing in the central and southern Yellow Sea during 2000–2011. The fi nal model accounted for 28.21% and 41.03% of the variance in anchovy distribution and abundance, respectively. The results of a two-step GAM showed that hour, longitude, latitude, temperature gradient(TGR), and chlorophyll a(Chl- a) concentration best explained the anchovy distribution(presence/absence) and that a model including year, longitude, latitude, depth, sea surface temperature(SST), and TGR best described anchovy abundance(given presence). Longitude and latitude were the most important factors affecting both distribution and abundance, but the area of high abundance tended to be east and south of the area where anchovy were most likely to be present. Hour had a signifi cant effect on distribution, but year was more important for anchovy abundance, indicating that the anchovy catch ratio varied across the day but abundance had an apparent interannual variation. With respect to environmental factors, TGR and Chl- a concentration had effects on distribution, while depth, SST, and TGR affected abundance. Changes in SST between two successive years or between any year and the 2000–2011 mean were not associated with changes in anchovy distribution or abundance. This fi nding indicated that short- and long-term water temperature changes during 2000–2011 were not of suffi cient magnitude to give rise to variation in wintering anchovy distribution or abundance in the study area. The results of this study have important implications for fi sheries management.  相似文献   

大型测绘工程标准化——以国家西部测图工程为例     

殷红梅  ;苏山舞  ;于荣花 《测绘软科学研究》2014,(4):13-16

大型测绘工程的标准化工作是保障工程效率和质量的重要工作。本文提出大型测绘工程标准化工作的分步研制、试验验证、重视反馈等一组工作方法,并提出在建立大型测绘工程标准体系时宜较多视点思考,忌太小粒度划分原则。以国家西部测图工程标准化为例,证明上述方法和原则的可行性。  相似文献   

基于GIS的邯郸市医疗服务设施可达性分析   总被引：1，自引：0，他引：1  

肖冀星  王振报 《测绘与空间地理信息》2020,(1):137-140,144

通过网络POI收集和地图截取手段获取邯郸市主城区范围内的居民点、医疗服务设施、路网数据,结合GIS的网络分析技术和改进的潜能模型对城市医疗服务设施可达性进行综合分析。结果表明,邯郸市的医疗设施资源分布主要集中在城市中心区、南部和东北部片区,在西南和北部城区医疗设施资源较少,且3种医疗设施可达性的分布差异较大。本文的结果对于医疗设施布局和规划具有重要的参考意义。  相似文献   

信息库建设中的数据字典标准化生产     

刘晓慧  吴信才  刘福江  罗显刚 《测绘科学》2013,38(1):173-175

在信息库的建设中,对原有数据库的整合改造是保证实现信息共享的关键问题。本文基于《信息库-数据字典规范》,将XML模式应用于数据字典的标准模板,设计了一个标准化、实用化的数据字典采集器,达到规范化、自动化采集数据字典的目的,不仅方便数据库的维护,而且可以利用数据字典对数据库结构作检查,保证各参建单位数据库整合改造结果的一致性和协调性。  相似文献   

如何运用GeoMAG软件使图件结构规范化——以贵州省分幅实际材料图为例     

邬晓芳  邓毅  王常薇  况忠 《贵州地质》2012,29(2):156-159

根据《全国矿产资源潜力评价数据模型规范》要求,图件结构模型包括图件名称、图件代码、图件分层、图件比例尺、坐标系参数、图层对应属性数据表、属性数据项代码等,全国矿产资源潜力评价项目办开发了GeoMAG软件来帮助大家更快、更好的规范图件。笔者在工作过程中视不同情况分别采用生成图件结构和规范图件结构两种方法对图件进行规范化处理,使提交的图件符合《全国矿产资源潜力评价数据模型规范》要求。  相似文献   

南海西部文昌地区测井数据标准化方法与应用     

张莹  潘保芝  何胜林 《物探化探计算技术》2013,35(5):598-604

为解决测井资料标准化这个重要而复杂的问题,以南海西部文昌地区常规测井资料为研究对象,充分利用岩心分析资料制定如下测井数据标准化方案：在深入分析研究区地质资料的基础上确定标准层优选关键井,并对关键井进行岩心刻度以确保关键井信息的正确;继而通过Grubbs公式对关键井的测井曲线频率直方图主频值进行处理,得到研究区第一个测井标准化值;再利用拟合度限定趋势面函数次数的趋势面求值法,处理全部井标准层内的测井曲线频率直方图主频值,得到研究区第二个测井标准化值;最终选取第一与第二标准化值的均值作为研究区校正标准。对比岩心分析资料,认为校正后的测井数据更加合理,这为研究区后续利用测井资料进行储层综合评价奠定了基础。  相似文献   

合成地震记录标定反射层位方法简析     

屈绍忠 《中国煤炭地质》2013,(7)

地震层位的标定是地震勘探构造解释的基础,合成地震记录与井旁道对比是层位标定的一个主要方法。层位标定精度除了受地震资料本身的质量及测井资料质量影响之外,制作合成地震记录的准确性取决于地震剖面极性、反射系数、平均速度、地震子波等关键因素的精度。通过介绍确定各种参数的关键技术,提出了在标定地震发射层位中采用的具体方法和标准,如利用相关系数对比时相关系数应大于0.6;利用平均速度对比确定的人工合成地震记录与实际剖面形态差异较小;时深调整前后测井曲线在形态上不应存在差异等。另外为提高对比精度,对目的层段时深关系进行调整时,应结合其他资料,如电性曲线、岩性剖面及钻井地质分层等信息,使之符合地质规律。  相似文献   

Biological parameters reflecting the current state of the exploited pink dentex Dentex gibbosus (Pisces: Sparidae) population off the Canary Islands     

《African Journal of Marine Science》2013,35(1):311-319

A total of 639 pink dentex Dentex gibbosus was collected in Canary Islands waters between April 1991 and September 1993. Total lengths ranged from 14,2 to 95,2 cm. Females dominated smaller size-classes and males the larger ones. The species was characterized by protogynous hermaphroditism. The overall ratio of males to females was 1 : 1,45. The reproductive period extended from April to September, spawning peaking in June/July. The total lengths at 50% maturity were 34,7 cm for females and 38,6 cm for males. The length-mass relationship for the whole sample can be described by the parameters a = 0,01014 and b = 3,0812. Fish aged 0–16 years were present in the samples. The parameters of the Von Bertalanffy growth equation were: L _∞ = 101,2 cm, k = 0,149·year^?1, and t ₀ = ?0,111 years. The rates of total mortality Z and natural mortality M were 0,57 and 0,28·year^?1 respectively. Rates of fishing mortality F and exploitation E were 0,29 and 0,51·year^?1 respectively. The estimated length at first capture (LC ₅₀) was 17,8 cm total length.  相似文献