Results 11 to 20 of about 455,433 (156)

增强型体外反搏器的电磁兼容性 [PDF]

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1997
摘 要 作者研究了增强型体外反搏器的电磁兼容性特征, 测试并分析了增强型体外反搏器对周围电磁 环境的影响,以及周围电磁环境的各因素对反搏器正常工作的电磁干扰及其影响程度,为医学电子仪器适应周 围电磁环境,提高自身抗扰度提供了实验依据。
李海云 郑振声
doaj   +1 more source

Timescales and contribution of heating and helicity effect in helicity‐dependent all‐optical switching

open access: yesRare Metals, Volume 42, Issue 1, Page 234-243, January 2023., 2023
Graphical abstract Abstract The heating and helicity effects induced by circularly polarized laser excitation are entangled in the helicity‐dependent all‐optical switching (HD‐AOS), which hinders understanding the magnetization dynamics involved. Here, applying a dual‐pump laser excitation, first with a linearly polarized (LP) laser pulse followed by a
Guan‐Qi Li   +9 more
wiley   +1 more source

当代电磁辐射对身心健康影响的研究概况

open access: yes, 2021
摘要: 科技进步为日常生活提供了诸多便利,通讯网络技术迅猛发展,原来的2G、3G、4G升级至5G,与之相应的电视塔、广播站、雷达、卫星通讯等设备也更新换代,造成环境中电磁辐射(EMF)强度日益增高,因此系统研究电磁辐射健康影响很有必要.联合国1996年发起国际电磁辐射项目(the International EMF Project),旨在全面研究电磁辐射对健康的可能影响,并制定国际认可的EMF暴露标准[1].
韩布新, 王澜
core   +1 more source

International clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder – Chinese (Mandarin) translation

open access: yesDevelopmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019
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

MXene‐Based Materials: Compositional Engineering for High‐Performance Microwave Absorption

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The rapid advancement of aerospace and electronic information technologies has imposed increasingly stringent requirements on microwave absorbing materials (MAMs), such as high absorption efficiency, lightweight, and environmental stability, making the development of advanced MAMs urgent for both civilian and national defense applications ...
Pan‐Pan Zhou   +8 more
wiley   +1 more source

MXene‐Based Electromagnetic Attenuation Materials in Microwave and Terahertz Bands

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT MXenes exhibit considerable potential for developing high‐performance electromagnetic (EM) shielding and absorption materials operating across microwave and terahertz frequencies, due to their tunable surface chemistry and exceptional charge carrier transport properties.
Guozheng Zhang   +9 more
wiley   +1 more source

Multifunctionality of Magnetic La(Fe, Si/Al)13‐Based Materials: Negative Thermal Expansion and Magnetocaloric Effect

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT In recent years, the field of magnetic materials has witnessed a paradigm shift from single‐function applications to multifunctional integration, driven by the growing demand for smart materials in advanced technologies. Among various magnetic systems, La(Fe, Si/Al)13‐series materials have emerged as particularly promising candidates due to ...
Irfan Liaquat   +2 more
wiley   +1 more source

Enhanced Thermoelectric Performance of SnSe Thin Film via Simultaneous Optimization of Texture and Carrier Concentrations

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Polycrystalline SnSe thin film materials have gained increasing attention as a promising solution for fabricating microscale, flexible, self‐powered electronic components in the field of thermoelectric (TE) materials and devices. However, it is still a great challenge to simultaneously achieve preferred crystal orientation and optimize carrier
Wenxia Li   +10 more
wiley   +1 more source

Bifunctional Competitive Structure of Biomass Carbon‐Derived Metacomposites for Tunable ε′‐Near‐Zero and ε′‐Negative Responses

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Regulating negative parameters of metacomposites is mainly limited by their unclear mechanisms, which affects their practical applications in new sensing, communication, electromagnetic (EM) protection and other fields. This work proposes a dual‐functional competitive design strategy based on the waste corncob‐derived carbon/polyaniline ...
Qiuyun Yang   +4 more
wiley   +1 more source

Carbon Material Films for Flexible and Efficient Electromagnetic Interference Shielding: A Review

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT With the rapid development of technology such as the Internet and electronic devices, electromagnetic radiation pollution has become an increasingly prominent issue, which negatively impacts both human health and the normal operation of equipment.
Yu‐Xin Chen   +10 more
wiley   +1 more source

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