Results 21 to 30 of about 162,194 (223)
UVA Assisted 4-Thiothymidine for Cancer Treatment [PDF]
, 2016 This article reviews the developments of 4-thiothymidine analogues, assisted with UVA light, as a novel cancer therapy. First, the key points on synthetic chemistry, photochemistry and cellular toxicity of 4-thiothymidine are summarized.
Feng, Luo +3 more
core +1 more source
Engineering 2D Materials for High‐Current‐Density Electrocatalytic Water Splitting
Rare Metals, EarlyView.ABSTRACT Water electrolysis is a key method for sustainable hydrogen production, using water as an abundant resource. However, efficient and stable operation at high current densities remains challenging due to energy losses, catalyst degradation, and limited ion–electron transport.
Tianqi Guan +8 more
wiley +1 more source
Dianci bileiqi, 2013 国内外学者对电流波头时间在0.545μs下的避雷器模型进行了大量试验和仿真研究,提出了多种反映MOA陡波下动态性能的电气模型的等值电路。本文详细论述以下几种典型模型:非线性电阻模型,IEEE推荐的模型,PINCETI模型（简化的IEEE模型）及非线性电感模型等,讨论模型相应的参数确定方法。其中,PINCETI模型没有考虑电容,非线性电感模型在学术界仍存在争议且适用范围狭小。对于模型的仿真值和实测值进行比较后得出:标准雷电流波作用下,非线性电阻模型和IEEE推荐的模型均具有较高的计算精度,仿真计算结果表明,
陈洁 +5 more
doaj
Greenhouse gas emissions from croplands of China [PDF]
, 2003 China possesses cropland of 1.33 million km 2. Cultivation of the cropland not only altered the biogeochemical cycles of carbon (C) and nitrogen (N) in the agroecosystems but also affected global climate.
Bohan, Liao +13 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT The high accuracy in surface‐enhanced Raman scattering‐lateral flow immunoassays (SERS–LFIAs) is critical for reliable point‐of‐care testing (POCT) in clinical diagnostics. Conventional approaches are often affected by sampling variability and uneven distribution of immunoprobes, leading to unreliable signal fluctuations.
Shuai Zhao +9 more
wiley +1 more source
Dianxin kexue随着人工智能（artificial intelligence，AI）的兴起，大模型（large language model，LLM）日益成为知识推介和多轮对话的核心技术。伴随而来，AI大模型在数据处理、模型训练和部署过程中的高能耗问题亟须有效评估，以便在模型优化后进行前后量化对比。提出一种AI大模型能耗的评估方法，旨在量化评估AI模型的服务效率（efficiency，E）。该模型使用训练收敛时间（time，T）、模型参数规模（parameter，P）和浮点运算量（floating-point ...
马晓亮， 刘英， 赵汝强， 杨邦兴， 高洁， 邓从健
doaj +1 more source
, 2019 [目的/意义]作者主题模型作为近年来计算机领域关注度较高的新型概率模型，在文本挖掘与自然语言处理等方向已有广泛应用。分析国内外作者主题模型及其改进的思路与应用，更好地把握其研究现状，以期为计算机、图书情报等相关领域科研人员提供参考。[方法/过程]本文选取Web of Science核心数据库、DBLP及中国知网（CNKI）数据库作为文献来源，通过制定检索规则、去重及人工判读等操作提炼出关于作者主题模型及其改进方法的文献集，从模型应用过程的视角，结合文献分析法对现有研究进行总结归纳。[结果/结论 ...
刘小平, 徐涵
core
MXene‐Based Electromagnetic Attenuation Materials in Microwave and Terahertz Bands
Rare Metals, EarlyView.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
Efficient Simulation Methods for Reinforced Concrete Columns with Encased Steel in High-rise Building Structures [PDF]
, 2016 型钢混凝土柱在建筑结构中往往是主要的承重构件之一，使用合适的数值模型分析其力学性能对高层结构抗震分析有重要的意义。本文综述了目前文献中已有的低含钢率恢复力模型相关研究，分析了其理论、计算流程和算法，并在通用有限元软件OpenSees中编程实现。本文详细推导了模型中基本参数的确定方法，并用于模拟实际高层建筑结构中的型钢混凝土柱。首先，本文用恢复力模型模拟了单根型钢混凝土柱的试验，通过对比验证了模型的精度，研究了其计算效率。其次，本文将恢复力模型用于理想32层高层结构中的单排型钢混凝土构件静、动力分析中 ...
曾志弘
core
Giant Tunability of Individual Magnetic Skyrmion Size via an Oscillating Local Magnetic Field
Rare Metals, EarlyView.ABSTRACT Magnetic skyrmions hold great promise as memory and computing elements in future spintronic devices. Despite the demonstration of various devices, techniques for addressable and high‐precision manipulation of individual skyrmions remain scarce.
Cai‐Hong Xie +13 more
wiley +1 more source