Results 131 to 140 of about 70,150 (293)

深水钻井导管力学特性参数敏感性分析

open access: yesShiyou jixie, 2014
深水钻井导管受力复杂,影响因素较多,主要包括平台偏移、海流流速、土壤强度、固井质量和低压井口出泥高度等,确定各影响因素的优先等级是深水钻井导管钻前设计和现场作业急需解决的问题。建立了深水钻井导管力学分析模型,分析了导管的力学特性,采用正交试验方法安排仿真试验方案,对仿真试验结果进行极差分析和方差分析,从而确定各影响因素对深水钻井导管力学特性的影响大小和显著性。研究结果表明,导管最大应力值出现在泥线以下8 m左右,影响导管最大Mises应力的因素依次为平台偏移、导管外径、导管壁厚、海流 ...
李飞   +4 more
doaj  

Research on the Determinants of National Identity of Hong Kong People:An Empirical Analysis on the Sample of Asian Barometer Survey [PDF]

open access: yes, 2016
国家认同是整合社会资源、凝聚社会力量的重要手段,也是保障社会稳定、实现国家长治久安的精神力量。香港特别行政区,由于其特殊的殖民历史、特殊的政治制度和政治地位,当地民众形成了特殊的政治认同和文化认同。近年来,香港民众与内地不断发生冲突事件,方式越来越激烈,影响越来越大,有调查显示,香港民众的国家认同感连年下降,如今已降至历史最低,香港民众正面临着国家认同的危机。造成这种现象的原因是什么?是特殊的政治认同使然还是文化归属的影响?本研究旨在利用亚洲民主动态调查(AsianBarometerSurvey,ABS)
刘庆华
core  

The Relationship Between Socioeconomic Status and Productivity of Female Garment Workers of Bangladesh: Mediating Role of Job Satisfaction and Job Engagement

open access: yesSexuality, Gender &Policy, Volume 9, Issue 1, February 2026.
ABSTRACT The purpose of this study is to determine the relationship between productivity and socioeconomic characteristics, as well as the degree to which job satisfaction and engagement can strengthen or moderate this association. With a focus on the mediating roles of job satisfaction and job engagement, this study examines the complex relationship ...
Abdullah Al Masud   +6 more
wiley   +1 more source

病理技术HE染色用于病理诊断中的价值分析

open access: yesZhongguo shiyan zhenduanxue, 2015
病理诊断属于现代医学中最具权威性的一种诊断方法,其病理诊断准确性除了受病理检查医师技术水平的影响,还受组织病理片的处理质量及染色效果的影响。并且在现代病理检查工作中,因标本固定时间不规范、组织脱水不完全或者是在某些因素影响下导致试剂浓度改变等因素的影响,对制片质量造成了巨大影响,因此加大了临床诊断难度[1]。为了研究病理技术HE染色在病理诊断中的应用价值,选取我院400例石蜡切片及组织进行染色 ...
马峰, 刘仲祥
doaj  

Spatial and temporal variations of river water and sea-ice melted water in the western Arctic Ocean [PDF]

open access: yes, 2015
北冰洋淡水组分的结构及其时空变化不仅显著影响北冰洋的生态系,而且对全球深海热盐环流和全球气候变化起着重要作用。本研究以白令海峡、楚科奇海陆架区和加拿大海盆等3个区域为研究对象,利用中国第1、2、3、4、5次北极科学考察在西北冰洋获得的海水δ18O数据,结合美国国家航空航天局发布的北冰洋δ18O数据,借助海水δ18O和盐度的质量平衡,定量研究淡水组分中河水和海冰融化水的贡献,揭示不同来源淡水组分在白令海峡、楚科奇海域及加拿大海盆的分布特征 ...
潘红
core  

The Role of Public Finance to Address the Global Finance Gap for Drinking Water Services

open access: yesWorld Water Policy, Volume 12, Issue 1, February 2026.
ABSTRACT Meeting SDG target 6.1 for drinking water requires addressing the finance gap between the funds available from tariffs, taxes and transfers, and the life‐cycle costs of sustaining these services. While there are li‐mitations to applying repayable finance to address this gap, governments can be well suited to support both drinking water ...
Kristina Nilsson
wiley   +1 more source

Theoretical and Empirical Research of the Influence of the Sovereign Wealth Fund 's Investment Income [PDF]

open access: yes, 2016
20世纪80年代以来,中国经济高速发展,在经常账户和资本账户双顺差的推动下,我国外汇储备规模在2006年越居全球首位,目前我国外汇储备规模已达3.3303万亿美元。如何在保障国家外汇储备安全的同时提高投资的收益,成为一个亟待解决的难题。基于此,我国于2007年成立了主权财富基金——中国投资有限责任公司。面对复杂多变的经济形势,探究主权财富基金投资收益的影响因素有助于提高主权财富基金的投资收益,而目前关于主权财富基金投资收益影响因素的研究较少。这正是本文的研究意义和研究目的所在。 本文分为四个部分 ...
吴思莹
core  

Effects of landscape fragmentation on floodplain fishes as revealed by species–habitat networks

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
Abstract How species interact with habitat patches is influenced primarily by habitat configuration (e.g., connectivity) and species’ functional traits. As levels of fragmentation increase, identifying the intricate connections between these components is crucial for biodiversity conservation.
Chen Zhang   +8 more
wiley   +1 more source

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