Results 41 to 50 of about 1,340,291 (192)

氧化锌非线性电阻的评价方法

open access: yesDianci bileiqi, 1987
1.绪言在电子回路中使用的SiC、ZnO为主的各种非线性电阻,主要用于吸收电路中的过电压,而非线性优异的ZnO非线性电阻则己成为目前的主要方向。为此,本文将叙述ZnO非线性电阻的评价方法。 ZnO非线性电阻是含有特定的添加物(Bi2O3,CoO,MnO,Sb2O3,Cr2O3等)ZnO的烧结体,是在烧结体中呈现有新的晶界现象的一种陶瓷,它赋有优异的非线性和吸收过电压能力。因此 ...
住吉干夫, 松冈道雄, 严幼良
doaj  

Synergistic Dual‐Defect Engineering in Amorphous‐Nanocrystalline Heterostructures for Accelerated Oxygen Evolution

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Defect engineering has been widely demonstrated as an effective strategy for enhancing the activity of OER metal catalysts, among which the introduction of twin boundaries (TBs) has proven particularly efficient. However, single‐type defects offer limited performance enhancement.
Wentao Cai   +11 more
wiley   +1 more source

WDM系统中的光纤非线性效应及其对系统的影响

open access: yesGuangtongxin yanjiu, 2002
光纤非线性效应是限制波分复用 ( WDM)通信系统发展的主要因素 .文章系统地讨论了 WDM光纤系统中各种光纤非线性效应 ,着重于多信道非线性效应及其对系统的影响 .提出了各种有效地抑制非线性效应的措施 ,供系统设计者参考 .
林其银, 杨胜利
doaj  

Developmental plasticity drives converge nt shifts in phosphorus acquisition strategies towards root phosphatase activity in Moso bamboo under nitrogen addition

open access: yesFunctional Ecology, Volume 40, Issue 7, Page 2221-2236, July 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Anthropogenic nitrogen (N) deposition is a major driver of global change. However, its effects on the developmental plasticity of plant nutrient strategies remain poorly understood.
Quan Li   +11 more
wiley   +1 more source

采用非线性补偿算法的超长跨距系统

open access: yesGuangtongxin yanjiu, 2018
搭建一个双向拉曼放大超长跨距光纤传输系统,在接收端采用非线性补偿算法来补偿因传输距离长和入纤光功率高所带来的光纤非线性效应,并通过实验成功实现了10Gbaud/s 16正交幅度调制(QAM)信号的传输,传输距离为300km。仿真和实验结果表明,通过采用非线性补偿算法,接收端信号的性能相比未使用非线性补偿算法时提高了2dB。证明了非线性补偿技术在超长跨距光纤传输系统中是非常有效且必要的。
周文婷   +7 more
doaj  

线性电位器产生非线性传递函数分析

open access: yes, 2003
论述了在电路和自动控制系统中经常遇到而又常常未引起重视的线性电位器的非线性响应问题,由浅入深地从理论和实践两个方面阐明了非线性产生的原因 ...
马骥, 燕奎臣
core  

Policy Windows in an Authoritarian System: How Alignment, Leadership Signals, and Disasters Enabled Policy Entrepreneurship in China's Poverty Alleviation

open access: yesReview of Policy Research, Volume 43, Issue 4, July 2026.
ABSTRACT China's poverty alleviation campaign is significant. Over the past four decades, the number of people in China living below the international extreme‐poverty line fell by close to 800 million, accounting for nearly three‐quarters of the global reduction in extreme poverty.
Zhiqi Xu, Wil Hout
wiley   +1 more source

基于优化算法对活性污泥数学模型稳态仿真

open access: yesGongye shui chuli, 2007
活性污泥数学模型No.1(ASM1)涉及的参数多,而且数学模型是非线性的,求解困难。采用非线性优化的方法仿真ASM1,把仿真结果和基准值做了比较。仿真结果证明非线性优化仿真方法可行。
张英爽   +3 more
doaj   +2 more sources

非线性角度电位器及其在仿真伺服系统中的应用研究(英文)

open access: yes四川大学学报. 自然科学版, 2004
提出了一种将非线性角度电位器用于仿真伺服系统设计的新方案.首先推导了非线性角度电位器的数学模型,非线性角度电位器可将转角量转化为电压或电阻信号,然后将非线性角度电位器用于仿真伺服控制系统的模拟位置闭环,仿真伺服控制系统整体结构采用四闭环控制.仿真实验表明,采用非线性角度电位器的仿真伺服系统具有较高的控制精度、功能完善、可维护性好、具有很强的鲁棒性.
段海滨   +3 more
doaj  

Three Systemic Problems With the Privacy Notice Ecosystem

open access: yesPolicy &Internet, Volume 18, Issue 2, June 2026.
ABSTRACT Privacy notices have become ubiquitous across digital platforms, yet they consistently fail to enable informed user choice about data collection and sharing practices. Despite decades of research and regulatory interventions, users continue to ignore or misunderstand privacy notices.
Sophia Walsh   +2 more
wiley   +1 more source

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