Results 41 to 50 of about 13,777 (167)
ABSTRACT Tourism and International Relations, as interdisciplinary fields, encompass diverse knowledge, making them complex subjects. This article explores how official international relations bodies at subnational levels influence tourism using paradiplomacy and city diplomacy concepts.
Juliane Santos Lumertz +3 more
wiley +1 more source
Research on Force Transmission of the Artificial Hip Prosthesis and Osseointegration [PDF]
随着中国社会老龄化进程不断推进,由股骨头坏死、关节病变、骨折等原因产生的全髋关节置换手术量呈现逐年上升的趋势。 全髋关节置换手术利用人工髋关节假体置换病变的髋关节,假体一端与股骨髓腔装配,另一端与髋臼连接。人工髋关节假体置换失败的主要因素是影响假体近端骨整合的应力遮蔽,直柄假体与髓腔远端匹配度较低导致的假体无菌松动。 人工髋关节假体置换中的应力遮蔽、无菌松动等问题与假体的力传递特性密切相关。当假体上的力无法传导到股骨近端时,股骨近端将产生骨溶解,无法使假体与股骨形成良好的整合,假体在髓腔中的稳定性不足 ...
王爱民
core
齿轮可靠度计算的概率有限元法(第Ⅱ部分:齿面接触疲劳强度的计算)
本文将概率有限元法用于齿轮接触疲劳强度可靠度的计算。以功率、转速和疲劳极限为随机变量,在求解接触问题的有限元—线性规划法基础上,建立了相应的概率有限元基本方程及求解方法。该方法不仅可用于齿轮接触疲劳的可靠度计算,也可用于其他弹性体接触问题的可靠度计算。
吴立言, 刘更, 王步瀛
doaj
ABSTRACT This study elucidates the oxidation mechanisms governing Y/Hf‐doped AlCoCrFeNiTi high‐entropy alloys (HEAs) and reveals the pivotal role of fabrication processes in dictating high‐temperature oxidation behavior. We demonstrate that casting and spark plasma sintering (SPS) promote Y/Hf segregation, resulting in heterogeneous oxide formation and
Huaqing Yi +5 more
wiley +1 more source
Assessment of wind-induced fatigue crack initiation life at guyed mast earplate joints considering welding residual stresses [PDF]
A new method for assessing the degree of the cumulative fatigue crack initiation damage of the welds of earplate joints of a guyed mast,which connect the mast with the cable,is proposed.Based on the multi-scale wind-induced stress analysis of the ...
Pi, Y, Qu, W, Wang, W
core
ABSTRACT Nanocomposite permanent magnets with reduced rare‐earth content represent a promising class of materials for next‐generation high‐performance applications. However, asynchronous precipitation of soft and hard magnetic phases often results in grain size mismatch and limited coercivity.
Xiaowei Zhang +6 more
wiley +1 more source
Experimental and theoretical analyses of three-dimensional surface crack propagation [PDF]
2011-2012 > Academic research: refereed > Publication in refereed journalVersion of ...
Han, ZC +4 more
core
【目的】建立带桩嵌体修复下颌第一磨牙残冠的三维有限元模型。【方法】制成第一磨牙残冠的制锁式带桩嵌体修复体的模型,将该模型置于水杯中,利用螺旋CT扫描,通过图像合成软件建立三维数字模型,结合大型有限元软件ANSYS进行建模。【结果】建成后三维有限元模型与实体组织具有良好的几何相似性。【结论】将牙体修复模型置于水中,经螺旋CT扫描并与有限元方法结合起来,可以建立复杂的牙模型,且能真实地模拟实际情况,使用性好。
连克乾 +4 more
doaj
基于谱元法的地震波动数值模拟已被广泛用于地震震源破裂、大规模地震波传播、区域复杂场地及工程结构(群)地震反应、地震层析成像等重要问题的研究及应用当中,是目前地震工程学、地震学和地球物理学等地震科技领域共同关注的前沿热点技术。早期发展的切比雪夫谱元法(CSEM)和勒让德谱元法(LSEM)更接近谱方法的域分解思路,其形式相对复杂且计算效率较低。目前广泛使用的是一种形式简洁的LSEM,其实施步骤和主要公式已经与有限元法完全一致,仅通过内置的高斯-洛巴托-勒让德(GLL)高精度数值积分保留着与谱方法之间的联系 ...
Haojie Xing, Hongjing Li, Ruirui Nan
doaj +1 more source

