Results 91 to 100 of about 32,077 (249)
Gaoya dianqi, 1999 概述了利用分形学（Fractals）研究绝缘介质击穿机理的模型及利用计算机对树枝放电进行模拟的基本原理.结合分形学,给出了计算放电树枝分形维数的几种常用方法.
陈庆国, 邱毓昌, 魏新劳
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Design and Implementation of Assistant Decision System for Fire Control Based on Wireless Image Transmission [PDF]
, 2016 随着无线图像传输技术的迅猛发展，人们对获取视频、图片的时效性要求越来越高，无线图像传输已经成为网络化信息技术发展的趋势，无线图像传输技术在社会各个行业都有广泛的应用。在救援难度大、建筑物内部复杂的单位、特殊化危品处置、跨区域联合作战中，依靠无线对讲机和车载台是做不到视频图像传输的。为了能适应今后的消防部队作战指挥的多元化发展，灾害事故的多样化和复杂化，消防部队扑救各类火灾和事故救援的难度加大的状况，奋战在一线消防的官兵迫切需要提供一种可以直接把火灾扑救现场和抢险救援现场画面实时传输出去 ...
杨娜
core
Rare Metals, EarlyView.ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng +6 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2015 目的分析呼吸道分离鲍曼不动杆菌生物被膜形成能力与耐药性之间的关系。方法采用K-B法测定鲍曼不动杆菌对14种抗菌药物的敏感性,用改良微量板法检测菌株生物被膜形成时间及能力。结果呼吸道分离的鲍曼不动杆菌耐药形势严峻。53.93%的鲍曼不动杆菌可形成生物被膜,生物被膜形成阴性株对多数抗生素的耐药率高于生物被膜形成阳性株。结论呼吸道分离的鲍曼不动杆菌生物被膜形成能力与耐药性呈负相关。
刘原 +7 more
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Rare Metals, EarlyView.ABSTRACT Against the backdrop of global clean energy transition and surging demand for lithium resources, lithium extraction from salt lakes presents unprecedented development opportunities. Nanofiltration (NF) membrane technology, recognized for its efficiency, energy savings, and environmental benefits, demonstrates significant application potential ...
Wen‐Feng Li +5 more
wiley +1 more source
Gaoya dianqi, 1983 作者采用了有限元素法,就500千伏SF6绝缘设备的锥形及盘形绝缘子的电场分布进行了计算和分析,弄清了绝缘子的形状,倾角、厚度、屏蔽体的形状等因素对电场分布的影响,取得了三个较为满意的绝缘子设计方案。
姚抚城, 黎明
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Rare Metals, EarlyView.ABSTRACT The development of high‐efficiency, stable, and scalable perovskite solar cells/perovskite solar modules (PSCs/PSMs) highly depends on the performance and cost‐effectiveness of functional layers such as electron transport layers (ETLs) and hole transport layers (HTLs).
Baochang Wang +11 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 实现具有三维立体特征的流域地貌分形维数直接准确计算,是目前分形地貌学研究所面临的主要问题之一。依据变分法求解三维表面分形维数的基本原理,以DEM栅格数据为基础,利用ArcGIS9.2中的窗口分析功能,对所建立的小流域模型不同发育阶段的三维地貌闵可夫斯基维数进行研究。结果表明,变分法和GIS的有机结合使三维地貌分形维数的直接计算成为可能,小流域模型不同发育阶段的三维地貌在各自无标度区内呈显著的分形特征,三维地貌闵可夫斯基维数不仅能有效表达小流域模型不同发育阶段地貌的差异性(变化范围达0.452 ...
王民, 李占斌, 崔灵周, 李鹏
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A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells
Rare Metals, EarlyView.ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou +12 more
wiley +1 more source
Guangtongxin yanjiu, 2012 为了便于精确控制熔锥光纤的形状,基于理论与实验研究,首先建立了熔融拉锥过程中熔锥光纤的成形模型,分析了熔锥形成的基本原理,并分别对加热区域不变及线性变化两种情况下熔锥形状进行理论分析,确定了加热区域长度、拉锥距离与熔锥过渡区形状、锥腰长度及半径的关系,最后给出了一系列熔锥光纤的理论形状和实验得到的实际形状。实验结果表明,熔锥的实际测量值与理论值十分接近,相对误差<3.89%。
夏娟, 诸跃进
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