Results 11 to 20 of about 4,755 (157)
Importance of timely metadata curation to the global surveillance of genetic diversity
Conservation Biology, Volume 37, Issue 4, August 2023., 2023 Abstract Genetic diversity within species represents a fundamental yet underappreciated level of biodiversity. Because genetic diversity can indicate species resilience to changing climate, its measurement is relevant to many national and global conservation policy targets.
Eric D. Crandall +23 more
wiley +1 more source
Acupuncture Treatment for Cough‐Variant Asthma: A Meta‐Analysis
Evidence-Based Complementary and Alternative Medicine, Volume 2021, Issue 1, 2021., 2021 Background. In recent years, there have been many clinical reports on acupuncture treatment of cough‐variant asthma, but no researcher has objectively analysed and evaluated the efficacy and safety of acupuncture treatment of cough‐variant asthma from the perspective of evidence‐based medicine. Objective.
Jian Xiong +8 more
wiley +1 more source
Gaoya dianqi, 2021 为掌握SF6气体的低温放电特性,保证低温环境下SF6气体设备的运行可靠性。文中开展了-50℃至20℃温度范围内,半球头棒板电极下SF6气体的工频击穿试验。同时测量了降温过程中SF6气体的气压随温度的变化。获得了稍不均匀电场中绝对气压0.7 MPa和0.5 MPa的SF6气体的放电电压随温度的变化规律。发现当温度从20℃降低到-50℃时,SF6气体的放电电压和气压均呈现先缓慢降低,再迅速降低趋势,放电电压下降趋势的拐点与气压下降趋势的拐点基本一致,计算发现该拐点温度等于SF6气体的液化温度 ...
王远东 +6 more
doaj
The Led Ceiling Light Of IR Control Dimming CCT And Lighting [PDF]
, 2015 随着科技水平的提高和能源问题的不断加剧，节能环保成为了新时代各国发展的一个主题。LED作为一种新型节能高效的环保光源，在越来越多的领域展现了其优异的应用特性，受到了各国政府的重视，特别是LED用来做照明灯具,其投入的力度越来越大，LED的发光效率的飞速提高昭示着第四代照明光源正在不断发展。 本文创新点是基于传统的红外控制信号通过软件算法进行调光调色，主要特点：第一在调光时保持色温不变，在调色时保持亮度恒定，而且在调节时不管是色温还是亮度会渐变到当前档，不会出现突变，给人眼一个适应的过程 ...
曾梅真
core
Plasma‐Boosted Bi2Mn4O10 Electrocatalysis Enables Real‐Time On‐Board Monitoring of CO2 in Exhaust
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Real‐time monitoring of CO2 concentration in automobile exhaust is critical for effective carbon emission reduction. However, the inherently inert nature of CO2 poses a significant challenge for achieving accurate and efficient detection in the exhaust automobile environment.
Aining Jiang +6 more
wiley +1 more source
Design of a DC-DC Synchronous Buck LED driver [PDF]
, 2016 驱动电源电路是大功率LED光源设计的关键技术，由于发展时间较短，目前大功率LED驱动电源依旧处于发展和完善阶段，驱动电源技术成为目前大功率LED的短板。本文针对路灯、舞台灯、车灯等大功率LED照明应用中驱动电源转化效率低、恒流精度不高、调光精度差等问题，设计了一款高效率、高恒流精度、PWM信号精确调光的同步降压型LED驱动芯片。 本文针对大功率LED的电气特性以及驱动电源的相关技术要求，提出了滞环电流控制、无需谐波补偿的同步Buck开关电源结构，提高了芯片的转化效率 ...
胡晔
core
LabVIEW在近代物理实验新课程体系构建中的应用与实践 [PDF]
, 2018 本文在大学物理实验教学中引入模块化开放式的教学方式,导入LabVIEW虚拟仪器技术,探究LabVIEW技术在近代物理实验新课程体系建构中的应用与实践[1].教学实践表明:这种教学模式,不仅使学生对抽象的理论知识有了更加直观的认识,而且激发了学生学习的积极性,拓宽了学生的视野.同时将虚拟仪器技术与网络技术相结合,实现了开放式教学,为学生创新能力培养提供了有利的技术平台,获得了良好的教学效果.福建省自然科学基金项目资助 ...
买合苏提·玉苏甫 +3 more
core +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Chemically self‐charging aqueous zinc‐ion batteries (AZIBs) have emerged as promising candidates for energy storage technologies owing to their environmental autonomy and structural simplicity. Nonetheless, the self‐charging performance is significantly compromised by the limited potential difference between cathodes and oxygen, as well as the
Yan Wang +5 more
wiley +1 more source
Study on the carbonitriding cast iron by liquid micro-discharge plasma [PDF]
, 2016 液相微弧放电等离子体电解碳氮共渗技术是一种新兴的表面改性技术。相对于传统表面改性技术，它具有能耗低、不需要真空装置、成本小、环境污染小、工艺简单等特点，在航空航天、军工、机械、电子、医疗、装饰等许多领域具有广阔应用前景。 本论文采用液相微弧放电等离子体电解碳氮共渗技术，在乙酰胺甘油水溶液电解液体系中对铸铁表面进行了碳氮共渗处理。电源参数为：电流大小固定为3A，频率固定为100Hz，占空比固定为25%；电解液配方为：去离子水750mL，乙酰胺150g，甘油80mL ...
李俊雄
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Chlorination roasting has emerged as a promising pyrometallurgical strategy for the selective recovery of lithium from spent lithium‐ion batteries (LIBs). In this study, a natural roasting agent, seawater‐derived chlorides, was employed to selectively extract lithium from spent LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode. MgCl2·6H2O, a main component
Bei‐Lei Zhang +7 more
wiley +1 more source