Results 61 to 70 of about 8,369 (224)
In vitro culture, cryopreservation, and field reintroduction of the endangered Mingan thistle
Abstract Current plant conservation efforts are hindered by, for example, poor seed germination, low viability, and insufficient propagation and preservation technologies. To address these problems, we devised an approach to plant conservation that integrates conservation, preservation, and restoration (CPR), which uses advanced in vitro techniques. We
Mukund R. Shukla +4 more
wiley +1 more source
在落实“碳达峰、碳中和”目标过程中,储能对支撑以新能源为主体的新型电力系统负荷平衡起到重要作用,新型储能技术因建设周期短、选址灵活性高、调节能力强等优势受到更多关注。对比梳理了美国、欧盟、日本等主要国家/地区新型储能技术战略规划布局情况。针对新型储能技术中锂离子电池、钠离子电池、液流电池、金属空气电池、压缩空气储能、重力储能六大技术方向,利用文献计量和专利计量方法深度挖掘分析了国内外在该领域的前沿主题与创新能力。结果显示,中国在新型储能技术领域研发创新能力整体较强。从论文成果统计来看 ...
汤匀 +4 more
doaj +1 more source
Design and Synthesis of Advanced Materials for Electrochemical Energy Storage [PDF]
在众多的储能系统中,锂离子电池和超级电容器具有很高的能量密度和功率密度,长循环寿命,安全以及环境兼容性好等优点,受到了来自科学界以及工业界的广泛关注。对于超级电容器和锂离子电池来说,它们的性能好坏与所使用的电极材料有很大关系。目前商业化的超级电容器电极材料和锂离子电池负极材料主要是碳材料,它的容量相对较低,已经不能满足人们日益增长的需求。因此科学工作者正在努力寻找开发新型的高性能电极材料来替代传统的碳材料。最近研究结果表明,过渡金属氧化物具有很高的理论比容量而且价格低廉 ...
蔡道平
core
Emerging Risks and Housing Affordability Policy in Miami High‐Rises
ABSTRACT Recent advances in satellite‐based remote sensing and building performance measurement have raised critical questions regarding the long‐term settlement behavior of high‐rise structures situated on the complex subsurface of southeastern Florida.
Jean‐Pierre Bardet, Jeffrey Dorfman
wiley +1 more source
ABSTRACT This article investigates how TikTok Shop reproduces the e‐commerce model of Douyin Shop against a backdrop of divergent regulatory challenges and geopolitical distrust. One of the strategic changes we observe in TikTok Shop is the shift of consumer goods suppliers from local merchants to China‐based sellers.
Shuaishuai Wang, Jing Meng, Yitong Li
wiley +1 more source
分布式储能是解决新能源并网问题的有效手段,分布式储能的选址定容将影响储能系统效率、系统网损及投资成本等,因此有必要对分布式储能进行选址定容规划。文中提出一种分布式储能选址定容规划,具体策略是以电压稳定裕度为指标,选出部分系统电压稳定性弱的节点,进行预选址;然后在考虑储能设备充放电状态的基础上,针对负荷日特性曲线,设定储能系统的调度策略;并考虑负荷、风电、光伏时序特性,以有功网损为目标函数,利用粒子群算法寻优,优化储能充放电功率;最终确定分布式储能设备的位置及容量 ...
郜宁 +6 more
doaj
Synthesis and Electrochemical Performance of Biochar/Sulfur Composites as Cathode Materials for Lithium-Sulfur Battery [PDF]
单质硫具有资源丰富、无毒、廉价等优势,能提供高达1675mAh/g的理论容量,以硫和金属锂构建的锂硫电池能量密度为2600Wh/kg。但由于硫及其放电产物导电性差,中间产物多硫化锂的溶解及体积膨胀等问题,导致电极的活性材料利用率低和循环性差,限制了其应用。通过碳材料的引入可以获得导电复合材料,抑制多硫化物的穿梭,从而实现硫正极材料的高效利用;从生物质衍生而来的生物碳更具有简单易得,价格低廉,便于规模化,环保,资源可再生等优点,因此本文为以生物碳材料为主线 ...
吴娇红
core
ABSTRACT Aqueous zinc‐ion batteries (AZIBs) hold great promise for safe and sustainable energy storage, but their commercialization is impeded by severe Zn dendrite growth and interfacial instability. To address these challenges, we propose a defect engineering strategy employing ultrafine ZnAl2O4 (ZAO) nanoparticles (∼5 nm) with oxygen vacancy defects
Yilun Ren +9 more
wiley +1 more source
Study and Design of V2G system based on Grid-connected PV Power Generation [PDF]
随着分布式可再生能源渗透率的不断提高,光伏等可再生能源接入电网的方式更加多样。同时近年来电动汽车飞速发展,解决充电问题已成为当务之急。在减少大规模充电对电网产生影响的同时,将电动汽车作为储能单元参与电网的调峰调频有利于电网的安全经济运行。本文研究基于光伏发电的V2G系统,旨在增加新能源消纳并促进电动汽车的清洁化和低碳化。系统的最大创新点在于实现了光伏发电并网、电动汽车充电与V2G服务的分时复用。 针对家庭单相并网选取了双向两级式的电路拓扑,不仅结构简单而且易于控制。对双向全桥电路和Buck ...
孙纯鹏
core
ABSTRACT Low conductivity, slow ion‐diffusion, and limited reactive sites are common problems in electrocatalysts and electrode materials. In this study, a complex NiTe–CoTe heterojunction with abundant Te vacancies embedded in N, P, and F co‐doped hollow carbon nanorods (NiTe1−x–CoTe1−x/NPFC) was fabricated via a simple ionic liquid‐assisted ...
Mingjie Yi +7 more
wiley +1 more source

