Results 1 to 10 of about 27,716 (212)

非线性负荷及其对电力系统的影响

open access: greenGaoya dianqi, 2001
介绍了非线性负荷的种类及其用电特性 ;分析了非线性负荷对电力系统及电器设备的危害 ;提出了分析非线性负荷时所采取的数学模型 ,论述了在解决实际问题时非线性负荷的处理方式。
薛军, 汪鸿, 华峰, 刘军成
doaj   +1 more source

基于移动窗解卷积法的2011年日本东北 MW9.0大地震场地非线性时变识别

open access: yesDizhen xuebao, 2022
利用模拟记录和2011年日本东北MW9.0大地震观测记录分析了基于移动窗解卷积法识别场地非线性时变特征的可行性,并与移动窗谱比法的结果进行了对比分析。研究表明:基于移动窗解卷积法可以较好地揭示场地非线性随地震动水平的变化过程,识别非线性发生的阈值、非线性变化程度及强震动后的恢复程度;与移动窗谱比法相比,移动窗解卷积法更容易获得较为稳定的土体非线性时变过程,但对于存在强阻抗比的浅表层土体,移动窗谱比法可以获得更准确的非线性程度。对2011年日本东北MW9.0大地震中8个KiK ...
Qifang Liu, Changlong Chen
doaj   +1 more source

Nonlinear free vibration analysis of Timoshenko beams with porous functionally graded materials

open access: yesXibei Gongye Daxue Xuebao, 2022
基于Timoshenko梁变形理论研究多孔功能梯度材料梁的非线性自由振动问题。针对多孔功能梯度材料梁的孔隙均匀分布和孔隙线性分布2种形式, 根据广义Hamilton原理推导多孔功能梯度材料Timoshenko梁的非线性自由振动的控制微分方程组并对方程组进行无量纲化。采用微分变换法(DTM)对各种边界条件下的控制微分方程组进行变换, 得到等价代数特征方程。计算了多孔功能梯度材料Timoshenko梁在固支-固支(C-C)、固支-简支(C-S)、简支-简支(S-S)和固支-自由(C-F ...
TENG Zhaochun, MA Lingquan, FU Xiaohua
doaj   +1 more source

Electro-optic modulation of AlGaN in deep ultraviolet [PDF]

open access: yes, 2016
深紫外非线性光学材料在光信息处理和高速光通讯等领域具有广泛的应用前景,发展适宜工作在深紫外波段的新型非线性光学材料成为国际学术界和产业界研发的热点。AlGaN基半导体凭借宽带隙带来的信道容量大、纤锌矿晶格排列缺乏反演对称性造成的非线性光学效应、以及作为半导体可控制对n型p型的光电集成等优势,成为理想的深紫外波段非线性光学材料,在电光调制和电光开关等非线性光学器件方面极具应用潜力。本文理论设计并生长了高Al组分的AlxGa1-xN/GaN超晶格结构,通过椭圆偏振光谱表征测算AlxGa1-xN ...
吴小璇
core  

Energy Engineering in Amorphous Alloys: Harnessing Fictive Temperature for Improved Corrosion Resistance

open access: yesRare Metals, EarlyView.
ABSTRACT In this study, an in‐depth investigation was carried out to elucidate the energy and structural modifications in connection with the property of corrosion resistance. The strategy is to employ the fictive temperature (Tf) as the indicator of the energy state of amorphous alloys.
Liang Yang   +10 more
wiley   +1 more source

Fault diagnosis and fault-tolerant control for nonlinear systems with linear output structure [PDF]

open access: yes, 2005
Article describes the process of fault diagnosis and fault-tolerant control for nonlinear systems with linear output ...
Shen, L., Wang, H., Yue, H.
core   +1 more source

Sulfur‐Doped Carbon Matrix‐Coated Co1‐xS/Ni0.96S@NC Rhombic Cubes Significantly Enhanced the Storage Performance and Kinetics of Lithium/Sodium‐Ion Batteries

open access: yesRare Metals, EarlyView.
ABSTRACT Metal sulfide, as a type of lithium/sodium‐ion battery material, possesses merits such as high capacity and low cost. Nevertheless, it is prone to structural changes during the cycling process, leading to volume changes and affecting electrochemical performance.
Wenjin Qin   +7 more
wiley   +1 more source

Research and Application of Digital Non-linear Editing in the Post-production of Film and Television Advertising [PDF]

open access: yes, 2015
纵观广告行业的发展进程,技术从中一直起着引导作用,整个广告行业的发展都依赖于日渐革新的技术。数字技术作为影像合成的必要手段,其包含的非线性编辑、虚拟技术、数字化非线性编辑、蓝屏抠像技术、数字处理等技术,贯穿于广告制作的策划、创意、制作到发行过程的每一个环节。数字化技术为丰富广告作品的创作形式、拓展创意空间、转换影像表现方式、解放创作者的创意思维提供了有力的技术支持。 本文先对影视广告相关理论进行说明,并对数字技术、非线性编辑的相关技术进行介绍,对影视广告的需求进行分析,对非线性编辑的应用 ...
吕丽青
core  

Lipid Nanoparticles Delivering ClpP‐mRNA Suppress Pyroptosis and Senescence in Intervertebral Disc Degeneration via mTOR/BNIP3‐Activated Mitophagy

open access: yesRare Metals, EarlyView.
ABSTRACT Intervertebral disc degeneration (IDD) is a predominant cause of low back pain, significantly impacting quality of life. Mitochondrial fitness is essential in the progression of IDD, as it regulates cellular senescence and pyroptosis. This study investigates the role of mitochondrial caseinolytic protease P (ClpP) in alleviating senescence and
Kun Wang   +7 more
wiley   +1 more source

The Study on Nonlinear Financial Behavior of Corporate Governance to R&D Investment [PDF]

open access: yes, 2016
随着市场竞争的日趋激烈,自主创新已成为一个企业乃至国家竞争力的核心战略。在全球化和信息化不断加强的今天,国与国之间的竞争,企业与企业之间的竞争,说到底就是R&D投入以及由此引发的自主创新能力的竞争。自2008年全球性金融危机爆发以来,世界各国更为清晰地认识到R&D投资和自主创新的重要性。尤其是对于中国这个世界最大的发展中国家,当前所面临的产能过剩,效率低下,产业急需转型升级等一系列经济问题都需要并且也只能借助促进技术创新来解决。在技术创新过程中,R&D投资是最为重要和关键的环节。R ...
刘胜强
core  

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