孤子为什么能在非线性介质中稳定传播?
Why can solitons propagate stably in nonlinear media?
孤子是色散(使波展宽)与非线性(使波陡化)相互平衡形成的局域波包,能在长距离传播中保持形状和速度不变,常见于光纤通信和水面波。
A soliton is a localized wave packet where dispersion (broadening) balances nonlinearity (steepening), preserving its shape and speed over long distances; seen in optical fibers and water waves.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
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出处备注:此条未指向带版次的可引用著作(通识性内容、机构文件或未展开的英文书名),本库不提供独立书目出处;如需精确引用,需由编辑补全具体篇目与版次。
Nature Physics — 非线性波研究
Nature Physics — nonlinear wave research
#孤子 #色散 #非线性波
湍流为何被称为经典物理未解难题?
Why is turbulence called an unsolved problem of classical physics?
湍流是流体在雷诺数高时出现的多尺度涡旋级联,能量从大尺度层层传到小尺度耗散,缺乏普适封闭解,其统计理论至今未能完全解决。
Turbulence is the multi-scale vortex cascade at high Reynolds number, where energy cascades from large to small scales and dissipates; no universal closed solution exists, so its statistical theory remains unsolved.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-05
来源 · Source
Nelkin,《In What Sense Is Turbulence an Unsolved Problem?》,Science,1992 (DOI: 10.1126/science.255.5044.566)
Nelkin, 'In What Sense Is Turbulence an Unsolved Problem?', Science, 1992, DOI: 10.1126/science.255.5044.566
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1126/science.255.5044.566; Science 255(5
#湍流 #涡旋级联 #雷诺数
费根鲍姆常数描述了混沌的什么普适规律?
What universal law of chaos does the Feigenbaum constant describe?
在单峰映射等系统中,周期加倍出现混沌的间隔比趋近普适常数δ≈4.669,表明不同非线性系统走向混沌的方式具有相同的标度规律。
In unimodal maps, the ratio of intervals between period-doubling approaches the universal constant δ≈4.669, showing diverse nonlinear systems reach chaos by the same scaling law.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
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出处备注:著录仅给书名,无版次与年份;同一书名常对应多个版次,不臆测具体版本。
《现代物理学评论》— 非线性动力学
Reviews of Modern Physics — nonlinear dynamics
#费根鲍姆常数 #倍周期 #普适性
洛伦兹吸引子为何被视为混沌的象征?
Why is the Lorenz attractor seen as an icon of chaos?
洛伦兹从简化大气对流方程得到三维确定性系统,其轨迹在双涡结构中永不重复却受限于有限区域,对初值极度敏感,是「蝴蝶效应」的数学来源。
From a simplified atmospheric convection model, Lorenz found a deterministic 3D system whose trajectory never repeats yet stays bounded in a double-spiral structure, exquisitely sensitive to initial conditions — the math behind the 'butterfly effect'.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注:著录仅给书名,无版次与年份;同一书名常对应多个版次,不臆测具体版本。
《现代物理学评论》— 混沌动力学
Reviews of Modern Physics — chaotic dynamics
#洛伦兹吸引子 #混沌 #确定性
什么是「蝴蝶效应」?
What is the 'butterfly effect'?
它指确定性混沌系统中,初值的微小差异会随指数增长放大,导致长期预测失效;名字源于「巴西蝴蝶扇翅可能引发得州龙卷风」的比喻。
It means that in deterministic chaotic systems tiny differences in initial conditions grow exponentially, defeating long-term prediction; the name comes from the metaphor that a butterfly's flap could trigger a distant tornado.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
程守洙 江之永,《普通物理学》第七版,高等教育出版社,2016
Cheng Shouzhu and Jiang Zhiyong, General Physics, 7th ed., Higher Education Press, 2016
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787040429190(豆瓣书目条目: 普通物理学.上册)
#蝴蝶效应 #混沌 #敏感性
为什么双摆的运动难以预测?
Why is the motion of a double pendulum hard to predict?
双摆是确定性的非线性系统,但其相空间轨迹对初始角度极度敏感,微小差别会迅速放大,短期内即偏离预测,是混沌的直观演示。
The double pendulum is a deterministic nonlinear system whose trajectories are extremely sensitive to initial angles; tiny differences amplify fast, deviating from prediction quickly — a vivid demo of chaos.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
《费曼物理学讲义》第一卷(运动学章节)
The Feynman Lectures on Physics, Volume I (kinematics)
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-7382-0298-3 (2006 Pearson 版,原始版为1963-65 Addis
#双摆 #混沌 #非线性