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Basic characteristics of mine dust suppression foam and the quantitative evaluation method of its performance [PDF]
, 2023 The priority direction of mine dust control is to suppress dust generation and flying at the source. Foam, a gas-liquid two-phase medium, has some unique advantages of large dust covering area, strong adhesion ability and fast wetting of dust.
Chaohang XU +4 more
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Experimental study on the influence of middle and low rank coal functional groups on coal wettability [PDF]
, 2023 Coal seam water injection can effectively inhibit gas gushing in the process of coal mining, and its inhibition effect mainly depends on the wetting characteristics of coal seam.
Dongjie YAN +6 more
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People and Nature, Volume 4, Issue 5, Page 1369-1386, October 2022., 2022 Abstract Urban greenspace provides citizens with important cultural ecosystem services (CES). Identifying landscape features and land use contexts that facilitate CES delivery is critical for guiding urban greenspace management. However, how landscape features and urban context interact with each other in influencing the CES of greenspaces remains ...
Yuan Wang, Jari Niemelä, D. Johan Kotze
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Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
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Gaoya dianqi, 2022 隔离开关合闸不到位是危害电网安全运行的重要因素之一。针对目前缺乏快速有效的隔离开关合闸状态非接触自动检测技术的问题，文中以单臂水平伸缩式隔离开关为例，分析隔离开关运动过程，利用地面激光雷达获取隔离开关导电臂点云数据，对数据进行排序、分组及拟合，获得导电臂方向向量，提出了基于导电臂方向向量夹角的隔离开关合闸状态检测方法，开发了自动测量工具，并将该方法及工具运用于现场检测。现场试验结果表明，提出的检测方法及工具可实现隔离开关合闸状态的自动检测。该方法为隔离开关合闸状态的带电非接触检测提供了一种新的技术手段。
刘衍 +5 more
doaj
Dynamic evolution characteristics and microscopic mechanisms of contact between gas-bearing coal and water [PDF]
The effectiveness of coal seam water injection in controlling gas and dust is closely related to the wetting effect of water on the coal. A dynamic wetting process is formed after the contact between gas-bearing coal and water, which is crucial for ...
Biming SHI +8 more
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Jixie chuandong, 2015 以弧齿锥齿轮的压力角、刀尖圆角半径、大小轮齿厚比等设计参数为优化对象,基于多体多自由度动力学方程以及混合润滑摩擦模型,对齿轮系统动态特性进行对比研究。综合考虑了系统的时变摩擦力、动态啮合力、传递误差以及齿侧间隙等非线性因素的影响,同时考虑到实际工作中齿轮啮合处于既有润滑油膜接触又有粗糙峰接触的混合弹流润滑状态。对系统动态响应进行求解,结果表明,相较于优化设计参数前,优化后的弧齿锥齿轮在动态啮合力及动态传递误差方面都具有更优的表现。最后,通过试验台架进行试验验证了研究结果的准确性。
杨军 +4 more
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Influences of compaction and content of hydrophobic agent on breakthrough pressure of hydrophobic soil [PDF]
Water infiltration, migration, and phase change of temperature are the crucial causes of frost damage in soils in cold regions. Modifying the soils to impart hydrophobic properties can effectively enhance their water resistance, offering a new approach ...
LI Lu1, 2 , LIN Chengxin1, 2, CHAI Yuxuan1, 2, SHI Shuo1, WU Yongkang1 , LI Xu
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An affinity bioartificial liver system based on polyethersulfone membrane modified with polydopamine and lysine [PDF]
, 2016 目前由肝功能衰竭、肝炎甚至肝癌引发的死亡率呈现快速的上升趋势。而肝移植是迄今为止最直接有效的治疗手段，但由于供体肝来源短缺、费用昂贵以及免疫排斥反应等问题的存在，严重制约了肝病治疗技术的发展。随着组织工程技术的不断发展，人工器官的研究已进入飞速发展阶段，尤其是生物人工肝（BAL）的出现重新燃起了肝病患者的希望。生物人工肝除了具有生物转化、活性物质合成以及物质代谢等作用外，还具备血液净化的功能，使其在肝病治疗领域吸引着愈来愈多学者的关注 ...
刘慧娟
core
International Journal of Applied Linguistics, Volume 36, Issue 1, Page 652-666, February 2026.ABSTRACT Given the importance of the linguistic landscape in language learning, the digital linguistic landscape (DLL) has emerged as an important multimodal input resource. However, few studies have been conducted to explore the antecedent and predictive effect of the DDL on L2 writing. To address this gap, the study attempted to conceptualize the DLL
Zi Yang, Lawrence Jun Zhang
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