Results 21 to 30 of about 565,697 (135)
Gongye shui chuli, 2007 近年来, 我国油田采出的原油中含有大量水分, 油田采出水可以用于回注。但在实际运行中大部分的回注污水水质还达不到低渗油藏注水要求, 致使水井欠注, 影响采油质量。活性炭纤维是一种新型高效吸附材料, 具有独特的孔结构。作者分析了应用活性炭纤维作为精细过滤材料的可行性, 认为其可以改善注水水质, 但存在清洗、成本等问题, 造成其不能在油田回注水处理中的推广应用, 是以后研究中需重点解决的问题。
王艳飞, 郑经堂, 吴明铂
doaj +2 more sources
, 2004 为了考察注意能力的年龄差异,分别从注意分配能力和注意选择能力两个方面对青年和老年被试的表现进行了比较.结果表明:青、老年在注意分配能力上没有显著的差异;而青、老年在注意选择能力上却有显著的差异,老年的注意选择能力有显著的衰退.因此 ...
焦书兰, 罗婷
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L2 Chinese Grammatical Acquisition and Processing: A Substantive and Methodological Review
International Journal of Applied Linguistics, EarlyView.ABSTRACT This study presents a systematic review of 92 empirical studies on Chinese as a second language (CSL) in grammatical processing and development, synthesizing their substantive foci and methodological characteristics. The results reveal consistent scholarly attention to cross‐linguistic topics, with less focus on features that are distinctively
Shaohua Fang, Yi Xu, Jiani He, Jia Wang
wiley +1 more source
Haiyang gongcheng zhuangbei yu jishu, 2017 针对浅海某油田钻井井筒废弃物(钻屑、钻井液以及含油污水等)处理困难的问题,在对油田地层具有断块复杂、断层众多等特点深入研究的基础上,论证了废弃物回注处理方案,形成了利用已有生产井以及实施专用回注井两种作业方案。通过对两种方案在层位选择、回注实施参数以及安全系数等方面考虑,最终选择钻探专用回注井,完钻后根据实测地层资料以及定向井数据对回注层位进行进一步筛选和优化。优选出上下具备良好的隔离层、能够满足浆体回注容量需要的层位,同时保证浆体不上窜地面以及不污染储层或其他层位。
袁则名, 和鹏飞
doaj
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Household food expenditure continues to be a key factor in ensuring the realization of the Human Right to Adequate Food. Particularly in Brazil, access to food can be limited by economic constraints in vulnerable families, especially among farming families, who have been more vulnerable to food insecurity in recent years in the country.
Lucas de Almeida Moura +3 more
wiley +1 more source
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Artificial intelligence (AI) has gained much interest in public administration and public policy fields in recent years. Research on and that uses AI has so far treated it as an object or context within the broader administrative and governance discourse.
Yanto Chandra, Jianxiang Tan
wiley +1 more source
今回掲載するのは、全体をおよそ二十八の段落に分けた、その終盤の七段落、今井源衛氏『やへむぐら』（古典文庫、一九六一年）で言えば、55頁から165頁に亙って本文が掲載されている、その132頁三行目から165頁最終行までである。今井氏の古典文庫本には、注や引き歌、部分訳が掲載されているが、今回の範囲で言えば特に、注三三一、注三五五、注三五九、注三八二を訂正する。底本の複製に基づき、或いは、別の観点から、今井氏の釈文で訂正した箇所は、今回の範囲では、134頁一一行目、136頁六行目、152頁四行目 ...
田村, 俊介
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Gongye shui chuli, 2008 为控制大庆油田注入水中细菌的数量和减少硫化物的危害，作者在油田污水注入站进行了二氧化氯杀菌试验，确定了二氧化氯的最佳投加浓度。结果表明，当储水罐内回注水中投加的二氧化氯质量浓度在40mg/L以上时，对污水中硫酸盐还原菌、腐生菌和铁细菌的灭菌率可达90%，回注水中的硫化物含量也明显减少，细菌与硫化物指标达到油田注水标准。腐蚀率却随着二氧化氯浓度的增大而逐渐增加，最高达到0.069mm/a。在回注水中二氧化氯质量浓度为40mg/L时，腐蚀率达到Q/SYDQ0605-2006企业标准。
舒志明, 张照韩, 陈忠喜, 马放
doaj +2 more sources
Evaluating the use of taxonomy in the IUCN Red List
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Taxonomy defines the units that conservationists strive to preserve for future generations. However, the discovery of new species and the taxonomic revision of existing species affect conservation efforts. Despite the importance of taxonomy for a species’ conservation, there is currently no overview of how those leading species extinction risk
Stephen T. Garnett +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Achieving rapid and selective separation of anode and cathode materials remains a critical challenge in the recycling of spent lithium‐ion batteries. This study develops a microwave‐enhanced flotation strategy for the efficient recovery of cathode and anode materials.
Peiyuan Ye +5 more
wiley +1 more source