Results 31 to 40 of about 10,315 (110)
Shiyou jixie, 2015 涡流工具排液是一种新型气井排水采气工艺。目前国内外针对井下涡流工具的室内及现场试验，仅获得部分宏观工作特性，缺乏深入的理论研究，具体排液机理不够清晰，限制了该工艺的推广应用。鉴于此，采用有限元分析方法建立涡流工具气液两相螺旋流动的数值模型，并借助CFD软件对其流动过程进行仿真。通过流动规律的预测及分析，确定出井下涡流工具排水采气机理。研究结果表明，涡流工具可形成螺旋上升的管壁液膜流和快速上升的中心气核流动；引发的高速螺旋涡流，有效降低了气液流动阻力，提升了采气速度，同时增强了气流的携液能力 ...
杨旭东, 李丽, 张军, 卫亚明
doaj
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
Haiyang gongcheng zhuangbei yu jishu, 2018 气液两相流广泛存在于深水油气开采过程中，由于水下井口装置的结构限制，只能测得油管流体和生产环空流体的井口温度。本文考虑气液两相流体在生产过程的传热机理，基于质量，动量和能量守恒方程，通过拟稳态法建立深水井筒两相流温度分布计算模型。计算结果表明，油管流体及环空流体温度随着井深的降低而降低，最外层环空温度变化最大；油管井口温度随着管内气体的表观速度增加而降低，随着液体的表观速度增加而增加。气液流速比越低，油管流体井口温度越高，气液流速比越高，井口温度越低；环空温度随着气液流速比的增加而降低。
唐宜家, 马天寿, 何玉发, 陈平
doaj
Journal of Adolescence, Volume 98, Issue 5, Page 1715-1736, July 2026.ABSTRACT Introduction Following rapid iterations in media technologies, Chinese millennials (born between 1980 and 1995) find themselves in a paradoxical state where digital saturation exists alongside fatigue, making them central practitioners of digital minimalist behavior.
Chao Zhang, Yinze Hao, Jingwen Li
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Because of superior transportability and high energy capacity, methanol is regarded as a potential hydrogen carrier. Photocatalytic methanol dehydrogenation offers a sustainable and cost‐effective method for releasing hydrogen. Conventional photocatalysts face challenging obstacles, including the low catalytic efficiency and rapid ...
Rundong Chen +9 more
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Gongye shui chuli逆向-并向流卧式气浮器具有气泡与絮体碰撞和黏附接触效率高、结合成的泡絮体稳定等优点，采用欧拉多相流模型和realizable k-ε湍流模型进行流体动力学（CFD）数值模拟，研究了结构参数和运行参数对其内部流态和流场的影响。模拟结果表明，挡流板高度为1 000 mm，并向接触区的距离为250 mm，溶气口1到左壁面距离为90 mm、溶气口2到左壁面距离为340 mm，气泡直径为30 μm，回流比为10%时，逆向-并向流卧式气浮器的流态和流场分布合理，气浮除油环境极佳。
李兴振, 尹凝霞, 程光玮, 王英
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Wafer‐Scale Amorphous g‐C3N4 With Broadly Tunable Dielectric Properties for 2D Electronics
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Two‐dimensional (2D) semiconductors are regarded as promising candidates for next‐generation electronics due to their superior electrostatic control; however, their performance is severely constrained by the lack of suitable dielectric materials.
Binyin Gao +13 more
wiley +1 more source
Gongye shui chuli, 1990 从分析沉淀气浮过程的热力学、动力学和有关的机理出发,利用射流溶气、布气板充气及旋流原理,研究出的一种有高负载能力,高气浮分离效率的新型回收处理重金属离子废水的设备——旋流——充气气浮系统。气浮分离效率在97%以上,比常规加压溶气气浮系统快十倍以上,能耗减少30%。
朱锡海 +4 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Light‐activated gas sensors hold significant potential in environmental monitoring and smart Internet of Things (IoT) owing to their advantage in room temperature operation. Nevertheless, due to a narrow light absorption range, high photocarrier recombination rate, and weak redox activity of the sensing material, the performance enhancement of
Jinyong Hu +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun +10 more
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