Results 11 to 20 of about 913,412 (134)
, 2010 在自行设计的装置上，进行了恒流量（25mL／min）条件下注入不同温度（24．2，40．3，59．5，80．1℃）质量分数为99．5％的乙二醇溶液（抑制剂）分解丙烷水合物的实验，研究了注入温度不同时丙烷水合物分解过程中温度和气相压力的变化规律。实验结果表明，随乙二醇溶液注入温度的升高，丙烷水合物分解时间缩短；通过计算得到丙烷水合物的平均分解速率介于60．63～140．70mmol／（min·L）之间，并随注入温度的升高而增大；提高注入温度有利于丙烷水合物的分解。与注入纯水分解丙烷水合物的实验结果相比 ...
臧小亚 +3 more
core +5 more sources
, 2015 塔里木油田分层注水、注气井存在超深、高温、高压的特点,注入流体物性沿井深变化大,为了满足计算精度,必须充分考虑流体物性的变化。常见的注水水嘴计算方法无法达到精度要求,而注气水嘴的计算方法也未见报道。为此提出了满足塔里木油田分注要求的分层配注水嘴尺寸计算方法,由管柱中的流动得到嘴前压力、注入指数曲线得到注入压力,利用嘴前压力和注入压力,通过嘴流方程得到水嘴尺寸。在计算中需要考虑注水和注气在管流和嘴流方面的差别,充分考虑流体物性随温度和压力的变化,沿井深划分小段进行计算。此外 ...
周理志 +5 more
core +2 more sources
, 2014 采用自制的一维天然气水合物（NGH）开采模拟试验装置,模拟海洋地质条件,在填砂模型（填砂管直径8 cm,长80 cm）中生成天然气水合物,并通过注入热盐水进行热力开采的物理模拟试验,分析水合物藏地质因素和注热参数对注热水开采能量效率（水合物分解所得甲烷气的热量与注入热量之比）的影响。结果表明：影响能量效率的因素由大到小依次为注热水温度、水合物饱和度、初始温度、注热水时间、注热水速度;在水合物藏地质因素中,水合物饱和度越大,初始温度越高,注热水开采能量效率越高;在注热参数中,注热温度越高,能量效率越低 ...
李小森, 李淑霞, 徐新华, 李杰
core +5 more sources
Hybrid Flexible–Soft Neural Interface as a Practical Solution for Long‐Term Implants
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Implantable neural interfaces face persistent challenges in long‐term functionality due to chronic immune responses, mechanical mismatch with tissue, and material corrosion in vivo. The commonly used flexible materials, such as polyimide and parylene‐C (poly[monochloro‐p‐xylylene]), have advantages in low water vapor permeability and high ...
Bowen Ji +13 more
wiley +1 more source
Concurrent Crises and Non‐State Service Provision
Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 3, September 2026.ABSTRACT Concurrent crises represent a significant challenge for disaster and public health governance. Activated in response to one threat, governing institutions may be distracted or stretched thin during an emergent crisis. In such crises, governments and communities rely heavily on non‐state service providers such as non‐profit organizations and ...
Daniel Sledge, Herschel F. Thomas
wiley +1 more source
Gongye shui chuli, 2001 针对埕岛油田海域海水水质特点和注入海水的处理要求, 研究了注入海水混凝沉降-过滤净化处理工艺技术。并配套研制筛选了混凝剂和絮凝剂, 降低了后续过滤设备的处理负荷, 提高了净化效果, 将悬浮物含量为数百mg ...
韩霞, 刘娜, 宗华, 桂召龙
doaj +2 more sources
Why Pediatric Drowning Must Be a Global Health Priority: A Call to Action
World Medical &Health Policy, Volume 18, Issue 3, September 2026.ABSTRACT Pediatric drowning is a leading yet underrecognized cause of child mortality worldwide, disproportionately affecting children in low‐ and middle‐income countries (LMICs). While events in high‐income settings often reflect isolated lapses in supervision or safety barriers, in LMICs drowning is driven by structural inequities, including ...
Carlee Lenehan +4 more
wiley +1 more source
, 1998 根据国内外注水井的研究资料和对注水井测试资料的实际分析，对注水井的测试方法、理论发展、分析解释方法进行了综合分析论述，说明了注水井试井解释应得到的主要结果 ...
刘俊丽, 刘曰武, 刘振庆
core +2 more sources
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT To overcome the challenges of the strength‐ductility trade‐off in laser additively manufactured (LAM) titanium alloys, and to avoid the intragranular microstructure degradation often caused by an exclusive focus on grain equiaxialization, this work proposes a novel strategy of “grain morphology‐intragranular microstructure co‐optimization ...
Kexin Zhao +8 more
wiley +1 more source
World Water Policy, Volume 12, Issue 3, August 2026.ABSTRACT Groundwater depletion is a major challenge in semiarid, hard‐rock regions where irrigation demands often exceed natural recharge. This study evaluates the effectiveness of farm‐scale recharge pits as a local, supplementary, and community‐managed groundwater recharge solution in the Dharta catchment of Rajasthan, India. Alongside check dams and
Prahlad Soni +4 more
wiley +1 more source