Results 11 to 20 of about 3,583 (102)
Abstract Several effective interventions have been developed for families with multiple problems (FMP), but knowledge is lacking as to which specific practice and program elements of these interventions deliver positive outcomes. The aim of this study is to assess the degree to which practice and program elements (contents of and structure in which ...
Loraine Visscher +7 more
wiley +1 more source
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 NiCoCrAlYTa coatings are widely used as bond coats in thermal barrier coating (TBC) systems for gas turbines and aeroengines to provide oxidation resistance and support the formation of a protective thermally grown oxide (TGO). Herein, high‐current pulsed electron beam (HCPEB) modification was utilized to strengthen a NiCoCrAlYTa coating by ...
Xiangcheng Li +6 more
wiley +1 more source
ABSTRACT Many metallic components are frequently subjected to coupled environments of friction and vibration, stemming from interfacial contact and relative motion between mating parts or external stimuli. Consequently, it is imperative for these components to exhibit a synergy of high wear resistance and superior damping properties.
Ze Pu +12 more
wiley +1 more source
ABSTRACT The commercialization of lithium‐sulfur batteries (LSBs) faces dual challenges of sluggish sulfur redox kinetics and lithium polysulfides (LiPSs) shuttling. Herein, we demonstrate a synergistic strategy combining multidimensional structural confinement with d‐band center modulation to simultaneously suppress LiPSs diffusion and catalyze ...
Shibo Rong +8 more
wiley +1 more source
ABSTRACT Single‐atom catalysts are attractive for CO2 photoreduction due to their maximized atomic utilization and tunable electronic structures. In this study, indium (In) single atoms were incorporated into graphitic carbon nitride (CN) through an impregnation‐assisted thermal polycondensation strategy.
Xueying Guo +6 more
wiley +1 more source
ABSTRACT A major challenge in fabricating eutectic NiTiNb alloys is the incomplete melting of Nb due to its much higher melting point than the NiTi matrix. In this work, a novel electron‐beam freeform additive manufacturing strategy is developed to eliminate unmelted Nb particles and achieve a fully eutectic structure through independent dual‐wire ...
Qing‐Da Zhang +9 more
wiley +1 more source
针对钍基熔盐堆白光中子源(Thorium Molten Salt Reactor with a Particle and Neutron Source,TMSR-PNS)在运行过程中出现中子束流掉束或打火导致的束流不稳定的问题,有必要设计研发一种具有高计数率、低中子束流影响、高中子/伽马甄别性能的中子束流监测器。基于蒙特卡罗模拟软件Geant4,系统研究了薄膜塑料闪烁中子束流监测器的中子转换层厚度、闪烁体厚度,以及入射窗材料等关键参数对薄膜闪烁体的影响规律,分析结果表明:闪烁体中子转换层厚度约为2 ...
陈 怡 +5 more
doaj +1 more source
粒子束辐照在AlGaAs/GaAs量子阱材料中引入的深能级缺陷
作者对AlGaAs/GaAs结构调制掺杂材料及多量子阱材料 ,分别使用电子束或质子束辐照 电子束辐照能量为 0 .4~ 1.8MeV ,辐照注量为 1× 10 13cm- 2 ~ 1× 10 16 cm- 2 ,质子束辐照能量为 2 0~ 130keV ,辐照注量为 1× 10 11cm- 2 ~ 1× 10 14 cm- 2 .辐照前后的样品均经过深能级瞬态谱 (DLTS)的测试 .测试结果表明 ,电子束辐照引入了新缺陷 ,其能级位置为E3=Ec-0 .6 5eV ,而质子辐照引入的深缺陷能级为E1 ...
廖志君 +3 more
doaj
本文报导了自行设计和研制的一台大面积强流脉冲电子束装置,其性能指标是:束截面500 100Cm2,束能量110—230kev,束流6—13KA,流强0.5—3Acm-2,脉宽0.7—1.5 μs。并比较了Ti、Al和Kapton三种箔材料做电子束窗口的性能.
范安辅, 陈文兴
doaj

