Results 91 to 100 of about 1,498,824 (286)

新型钻井液气测录井系统的设计开发

open access: yesShiyou jixie, 2011
针对目前传统的钻井液气测录井存在脱气不定量和分析成分少的问题,开发了新型钻井液油气分离及在线分析系统。该系统脱气部分利用半透膜分离原理,能针对性地脱出烃类气体,设计制造的脱气器可直接插入钻井液中提取分析成分,并通过专门建立的试验环境,试验获取了脱气器的动态衰减特性和膜两侧体积分数关联系数;系统的分析部分采用三模块设计,重新规划了分析单元的流程,扩展了在线分析的组分范围,可在线分析钻井液中油气成分。新型钻井液油气分析系统可提升钻井液气测录井水平,提高油气评价准确性,有助于弱油气储层的发现 ...
张卫, 李三国
doaj  

Constructed value of information with iterative scoring and parametric uncertainty to identify management‐relevant research priorities for a declining raptor species

open access: yesConservation Biology, EarlyView.
Abstract Constructed value of information (CVoI) is an expert elicitation decision‐analytic tool used to prioritize sources of uncertainty based on their potential to improve decision outcomes if resolved. Despite increased application of CVoI, the robustness of CVoI prioritization of sources of uncertainty relative to differences in expert elicitation
Kristin P. Davis   +7 more
wiley   +1 more source

改进的层次分析法在变压器油纸绝缘状态评估中的应用

open access: yesGaoya dianqi, 2019
层次分析法是一种进行定量和定性分析相结合的多目标决策分析方法,广泛应用于多特征量权重计算。文中对层次分析法进行改进,利用统计学的相关理论,把系统聚类分析方法和众数理论应用于层次分析法,结合专家所构造判断矩阵的一致性程度,通过加权平均算法得到指标的综合权重排序。改进的层次分析法不仅充分保留了原有判断矩阵的信息,同时全面考虑了专家个体判断结果的准确性和专家组综合意见。将改进的层次分析法应用于2个变压器油纸绝缘状态评估实例,算例结果表明:改进的层次分析法所得权重与传统层次分析法相比 ...
王楠   +6 more
doaj  

Effects of landscape context on avian specialist response to increased surface temperature in protected areas

open access: yesConservation Biology, EarlyView.
Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge   +2 more
wiley   +1 more source

联轴器的安装找正分析及其微机辅助设计

open access: yesJixie chuandong, 2004
联轴器的找正是安装过程中一个很重要的环节 ,应用解析分析的方法进行联轴器的安装找正分析 ,并有微机辅助分析计算 ,数据处理速度快 ,提高了找正分析的准确性。
蒋志强   +4 more
doaj  

Calibration of the species threat abatement and restoration metric's threat abatement component in a Costa Rican landscape

open access: yesConservation Biology, EarlyView.
Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair   +17 more
wiley   +1 more source

A study on applying hierarchy analysis to evaluate nursing management in emergency department

open access: yesHuli yanjiu, 2005
应用系统工程的层次分析法对急诊护理管理进行定量分析 ,一定程度上实现由定性分析向定量分析的转化 ,使问题处理的可信度更高。运用层次分析法对急诊护理各层次结构之诸要素进行方案排序 ,为决策者提供决策依据。
李荣花
doaj  

Design and Implementation of National Tax Source Monitoring and Analysis System in HaiXi County of QingHai [PDF]

open access: yes, 2016
近几年来,海西州国税局系统信息化建设按照国家税务总局信息化建设一体化的思路,在全州上下不断的努力下,取得了突破性进展,包括行政、征管、稽查、执法乃至日常的办公都已经纳入了税收电子化的应用范畴,并大多实现了网络化、集中化的管理。在此基础上,为进一步做好海西州国税局的税源监控和分析,依托信息化手段提高征管质量,设计、开发了税源监控和分析系统。 本课题首先对税务局的业务现状进行了调查研究,了解到由于在税源监控和分析过程中存在的种种问题迫切需要税源监控分析系统的构建 ...
赵媛
core  

Harnessing social media data to track species range shifts

open access: yesConservation Biology, EarlyView.
Abstract Biodiversity monitoring programs and citizen science data remain heavily biased toward the Global North. Especially in megadiverse countries with limited biodiversity records, incorporating social media data can help address existing data gaps.
Shawan Chowdhury   +15 more
wiley   +1 more source

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