Results 11 to 20 of about 7,370 (165)
Oxidation Performance of NiCoCrAlYTa + 7YSZ Coatings With Ta Addition at Different Temperatures
ABSTRACT This study investigates the morphology and oxidation behavior of thermally grown oxides (TGO) formed at the interface of NiCoCrAlYTa + 7YSZ (7 wt% Y2O3‐stabilized zirconia) coatings deposited by air plasma spray (APS) in air environments at 1050°C, 1100°C, and 1150°C. The enrichment of Ta‐rich oxides beneath the TGO, along with the segregation
Cheng Xu +8 more
wiley +1 more source
Study on Aerodynamic Performance of Wind Turbine Airfoil With Combined S-Slot and Trailing Edge Flap Control [PDF]
Reducing the blade aerodynamic loads is extremely important to extend the life of wind turbine blades. Trailing edge flaps are effective means to reduce blade aerodynamic loads, however, its regulation ability weakens greatly at large angles of wind ...
CUI Liu +3 more
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Study on conjugate heat transfer in a photovoltaic wall [PDF]
2002-2003 > Academic research: refereed > Publication in refereed journalVersion of ...
Jiang, R, Wu, QS, Yang, HX, Zhu, ZJ
core
Comparison and hydrodynamic performance analysis of positioning bow type self-propelled cutter suction dredger aft hull lines [PDF]
ObjectiveAs the hydrodynamic performance of a positioning bow type self-propelled cutter suction dredger (CSD) is significantly different from that of an ordinary ship, this paper analyzes its performance in order to assist in the rational selection and ...
Jiantao YANG +5 more
core +1 more source
Desertification is increasing in the Brazilian Semiarid, leading to loss of species and ecosystem services, while precise data on biodiversity distribution and trends are lacking. Public engagement in scientific projects can improve ecosystem protection.
Lucas Rodriguez Forti +3 more
wiley +1 more source
将黏滞阻尼器引入格构式拱形刚架,分析了阻尼器对结构平面内地震响应的控制效果。通过动力时程分析,研究了多遇地震作用下阻尼器减震效果随阻尼器布置位置、阻尼系数及结构关键参数取值的变化规律;揭示了罕遇地震作用下黏滞阻尼器对结构受力性能的改善机理。研究结果表明:在结构拱柱连接处附加黏滞阻尼器,其竖向减震效果较横向更显著;随阻尼系数的增加,位移减震率先上升后平缓甚至下降;罕遇地震作用时,在体系层面,黏滞阻尼器有效地降低了结构的整体变形;在构件层面,黏滞阻尼器改善了拱脚杆件塑性程度,使结构各构件受力更均匀。
贺拥军 +3 more
doaj
马赫数无关原理对高超声速热化学反应流的适应性研究 [PDF]
通过求解考虑热化学非平衡的5组分,17个基元反应的N-S方程,对马赫数无关原理对高超声速热化学反应流的适应性进行了研究。模型采用高超声速常用的柱状钝头体。对比量热完全气体、热化学非平衡气体下激波角、沿流线压力分布、阻力系数的差异,得出真实气体效应下马赫数无关原理依然适用的结论。通过对阻力系数的进一步分析研究知,真实气体效应是通过能量向振动能、化学能的从新分配机制来影响阻力系数的变化,且其所引起的阻力系数变化总体来说比较小;在M>15时 ...
姜宗林, 李康, 李进平
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Abstract As nations seek to expand protected area (PA) networks to cover 30% of land and seas by 2030 (30×30), there is an urgent need for systematic conservation planning and spatial prioritization that considers the broad range of ecological and socioeconomic factors influencing the persistence of biodiversity.
Edmond Sacre +2 more
wiley +1 more source
本文给出钝头细长锥无粘、平衡和非平衡高超声速绕流流场的数值分析。对存在化学反应的空气,考虑了13种气体组分和22个化学反应,包括N_2、O_2和NO的振动松弛与离介过程之间的耦合反应。头部亚-跨声速区和后身高超声速区分别用直线法和有限差分法进行计算。在来流条件M_∞=20~26,Re_∞=(p_∞u_∞α)/μ_∞=1.5×10~3~5.5×10~6(α为头部半径)的参数范围内,给出了绕流流场和等离子体鞘层诸特性,如激波形状 ...
周正瑾, 马文驹, 高智
core
Sensitivity analysis and optimization method of partition surrogate model based on physical knowledge driven [PDF]
The problem of "dimensionality disaster" of design variable is a key technical problem that restricts the application of current agent-based optimization algorithms.
SHAO Mengying +3 more
core +1 more source

