Results 21 to 30 of about 13,777 (167)

Electrospinning Synthesized Cd0.3Zn0.7S@PVDF/PAN Piezoelectric Nanofiber Membrane for Efficient Photocatalytic Hydrogen Evolution

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Photocatalytic hydrogen evolution technology is a crucial approach to achieve efficient solar energy conversion and green hydrogen production. However, traditional semiconductor photocatalysts often face issues such as weak visible‐light response, high photogenerated charge carrier recombination, and poor structural stability, severely ...
Longtao Guo   +8 more
wiley   +1 more source

Simulation Analysis and Optimization of Coach Seat and Passenger Coupling Impact System [PDF]

open access: yes, 2015
据相关资料表明,在客车碰撞所造成的人员伤亡中,因乘员与座椅之间的二次碰撞或座椅与车体相连部位的失效占了相当大的比例。为了提高我国客车在碰撞事故中对乘员的保护能力,客车座椅及其固定点强度的国家标准GB13057-2014目前已从推荐性标准升级为强制性实施标准。为了保证所设计的座椅能满足新法规要求,必须深入研究客车座椅及其固定支架的结构变形及乘员在碰撞过程中的伤害情况。 汽车碰撞过程是一个瞬间的复杂的物理变形过程,它包含了几何非线性,材料弹塑性变形非线性和零部件间复杂的接触非线性等特征 ...
卢琳兆
core  

Investigating the Origin of Topological‐Hall‐Like Resistivity in Zn‐Doped Mn2Sb Ferrimagnet

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Skyrmions and other chiral spin textures have been extensively studied as potential building blocks for novel spintronic devices. Hall‐resistivity anomalies that deviate from magnetization scaling, known as the topological Hall effect, have been widely employed as evidence for the presence of chiral spin textures in magnetic materials. However,
BoCheng Yu   +9 more
wiley   +1 more source

Research on Correction of Near-Surface Elastic Wave Forward Modelling Based on Enlarged Cell Technique [PDF]

open access: yes, 2016
地震学中的弹性波正演模拟是一件重要且不可缺少的事情,并且正演模拟的精度和速度往往直接决定了地球物理勘探的精度和速度。实际地球物理勘探应用中(如石油勘探、自然灾害预测),研究对象的巨大规模决定了人们对正演模拟的运行速度要求较高。时域有限差分(Finite-DifferenceTime-Domain,FDTD)方法是地震学中的一个稳定、灵活和有效的模拟工具,已经被广泛地开发和应用,并取得了极大的成功。交错网格时域有限差分(Staggered-GridFDTD)方法极其易并行 ...
魏松林
core  

Ultrahigh‐Strength Soft‐Magnetic NiFeCoAl Multi‐Principal Element Alloys Enabled by Multiscale Heterostructure Design

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Soft‐magnetic materials (SMMs) are indispensable for electrification and sustainable energy systems, yet their inherent mechanical fragility fundamentally limits applications under severe mechanical stresses. Enhancing the yield strength of SMMs is essential to prevent the degradation in magnetic performance and failure from plastic ...
Nairan Wang   +6 more
wiley   +1 more source

Optimized Design of Cu‐Ni‐Co‐Si Alloy Combining Machine Learning and Experimental Feedback

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT The machine learning method was employed to accelerate alloy design, and experimental feedback was provided to enhance predictive accuracy. A Cu‐2.7Ni‐1.0Co‐0.8Si alloy with superior properties was selected using a double‐objective optimization algorithm.
Shifang Li   +3 more
wiley   +1 more source

Design and Simulation of Contact Fatigue Testing System of Flexspline and Circular Spline in Harmonic Drive [PDF]

open access: yes, 2016
谐波齿轮传动是随着空间技术的发展而诞生的一种新型传动方式,其工作原理是利用柔轮的弹性变形波来实现运动或者动力传递,因其具有结构简单、传动精度高、传动比大等诸多优点,在航空、航天、机器人等领域得到了广泛应用。在谐波齿轮传动过程中,柔轮的运动情况比较复杂,作为弹性薄壁构件需承载交变应力,容易造成齿面磨损和疲劳断裂。因此,建立合适的模型对谐波齿轮传动过程中柔轮的错齿运动进行模拟分析具有重要意义。 本文首先针对谐波齿轮传动过程中柔轮的错齿运动设计了一种新的接触疲劳试验装置 ...
吴泽林
core  

Elevation, soil pH and calcium availability shape regional and local scale spatial patterns of PhoD gene abundance in tropical and subtropical forests

open access: yesFunctional Ecology, Volume 40, Issue 4, Page 983-1000, April 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra   +3 more
wiley   +1 more source

Efficient Simulation Methods for Reinforced Concrete Columns with Encased Steel in High-rise Building Structures [PDF]

open access: yes, 2016
型钢混凝土柱在建筑结构中往往是主要的承重构件之一,使用合适的数值模型分析其力学性能对高层结构抗震分析有重要的意义。本文综述了目前文献中已有的低含钢率恢复力模型相关研究,分析了其理论、计算流程和算法,并在通用有限元软件OpenSees中编程实现。本文详细推导了模型中基本参数的确定方法,并用于模拟实际高层建筑结构中的型钢混凝土柱。首先,本文用恢复力模型模拟了单根型钢混凝土柱的试验,通过对比验证了模型的精度,研究了其计算效率。其次,本文将恢复力模型用于理想32层高层结构中的单排型钢混凝土构件静、动力分析中 ...
曾志弘
core  

Lessons from an eradication under multiple constraints of an island rat population of record density

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
Abstract Invasive rats threaten island biodiversity, disrupting ecosystems and endangering native species. Although rat eradication has succeeded on many islands, tropical islands present unique management challenges. Strict regulations and financial constraints on some tropical islands further limit proven eradication methods, complicating rodent ...
Tatiane Micheletti   +7 more
wiley   +1 more source

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