Results 21 to 30 of about 3,918,984 (165)
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
wiley +1 more source
ABSTRACT Recovering palladium (Pd) from low‐concentration metallurgical wastewater still poses significant challenges. In this study, triaminoguanidine hydrochloride was used as the key functional site, and three guanidine‐functionalized covalent organic frameworks (GCOFs) were successfully constructed by adjusting the substituents (–H, –OH, and –OCH3)
Jiaxing Xiong +9 more
wiley +1 more source
ABSTRACT The polyanionic compound Na3V2(PO4)3 (NVP) has emerged as a competitive cathode material for sodium‐ion batteries (SIBs), owing to its high‐voltage redox activity (3.4 V vs. the Na+/Na reference couple) and NASICON‐type framework that enables superior ionic conductivity.
Xiaolei Wu +5 more
wiley +1 more source
Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English
ABSTRACT This study investigates the role of second language (L2) pride—an understudied affective factor—in shaping learners’ language learning motivation and involvement with informal digital learning of English (IDLE). Drawing on questionnaire data from 1388 Chinese university EFL students, the study employs structural equation modeling to examine ...
Minlin Minny Zou +3 more
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降低风洞气流总温是提高亚,跨声速风洞雷诺数的有效方法,现有采用液氮致冷的生产型低温风洞能满足设计各种新型飞机进行气动试验所需的雷诺数要求,但由于需耗用大量液氮,导致运行费用高昂,此外,排出大量低温缺氧气体还严重影响生态和环境 ...
俞鸿儒
core
Abstract Simulation studies are essential tools to assess statistical methods. Functioning as controlled experiments, simulations generate data from known underlying processes. However, unclear or incomplete reporting of simulation studies can impact their interpretability and reproducibility, potentially leading to the misuse of statistical methods ...
Coralie Williams +6 more
wiley +1 more source
高超声速边界层是一个基础的科学问题。为了研究高超声速平板边界层的流场特性,结合数值模拟、理论求解和试验验证三种手段进行综合分析。数值模拟对二维Navier-Stokes (N-S)方程采用五阶精度的WENO格式离散对流项、六阶中心格式离散黏性项,时间推进项采用三阶Runge-Kutta法。理论分析利用四阶Runge-Kutta结合打靶法求解得到可压缩平板边界层层流自相似解。试验验证利用中科院力学所JF-12复现风洞测试得到大尺度平板的壁面热流,大尺度的平板模型布置传感器达到了较高的空间分辨率 ...
姜宗林, 刘美宽, 韩桂来
core
Elephant conservation in India: Striking a balance between coexistence and conflicts
India harbors the largest population of Asian elephants in the world. The institutional, policy, and legal instruments that enable sustaining elephant population in India were elaborated in the article. Abstract In the human‐dominated epoch of the Anthropocene, nations worldwide are trying to adopt a variety of strategies for biodiversity conservation,
Ramesh K. Pandey +4 more
wiley +1 more source
疲劳研究是许多工业部门迫切需要开展的课题,但是要开展疲劳方面的研究,必须有疲劳试验设备,疲劳试验机就是最基本的设备之一。现在市场上销售的疲劳试验机,价格昂贵,一般都在十几万元至一百多万元。许多小企业和厂家都难以购买,而这些企业和厂家却有进行静力试验的材料试验机。如果将材料试验机改装为疲劳试验机,既可以充分发挥试验机的效率,又可以开展疲劳试验 ...
栗彦, 曾春华, 袁丕坚
core
为了准确测量35 kV氧化锌避雷器直流1 m A电压值,在分析氧化锌电阻片基本特性的基础上,通过模拟试验仿真,傅里叶函数变换以及对几组35kV避雷器的现场试验,分析了试验时有无滤波电容对测量的影响。分析结果表明,在无滤波电容试验时,直流1 m A电压值降低20%左右,且试验后绝缘电阻测量值明显下降。而有滤波电容试验时,输出电压更接近恒定的直流电压,且电容值越大,波动系数越小,测量结果越准确。但对于35 kV氧化锌避雷器试验,考虑电容的充电时间,依据经验建议其电容值取0.31.0μF为宜。
张雨 +4 more
doaj

