搜索结果: 1-14 共查到“理学 clue”相关记录14条 . 查询时间(0.055 秒)
Will warming bring a change in the winds? Dust from the deep sea provides a clue（图）
Will warming winds deep sea provides a clue
2021/1/18
The westerlies -- or westerly winds -- play an important role in weather and climate locally and on a global scale by influencing precipitation patterns, impacting ocean circulation and steering tropi...
Scientists find missing clue to how HIV hacks cells to propagate itself（图）
Scientists missing clue HIV hacks cells propagate itself
2017/11/24
Computer modeling has helped a team of scientists, including several scholars from the University of Chicago, to decode previously unknown details about the process by which HIV forces cells to spread...
Researchers uncover clue about how tiny microbes self-mutate
Researchers clue tiny microbes self-mutate
2017/4/27
Researchers have discovered that previously unidentified microorganisms have a genetic element that enables them to self-mutate. What's more, these organisms are so plentiful they dramatically expand ...
Get a clue:Biochemist studies fruit fly to understand Parkinson's disease,muscle wasting
Biochemist fruit fly Parkinson's disease muscle wasting
2016/7/4
The fruit fly may help us be less clueless about human muscle development and Parkinson's disease.Erika Geisbrecht, Kansas State University associate professor of biochemistry and molecular biophysics...
构建基于CLUE-S与灰色线性规划混合模型的土地利用优化配置方法，在导入区域政策、社会经济、生态目标和土地利用现状等条件下，进行土地利用数量结构与空间布局的统一优化，并以嘉兴北部地区为例进行实证研究，共设置现状趋势情景、规划目标情景和规划可持续情景这3种模拟情景。规划可持续情景侧重社会经济环境效益，故对建设用地快速增长和农用地持续减少起到明显调控作用，可实现生态敏感区环境和粮食安全的双重保护，是理...
基于SD和CLUE-S模型的张掖市甘州区土地利用情景分析
系统动力学模型 CLUE-S模型 土地利用/覆盖变化 情景分析
2012/8/15
近年来,学者们基于不同研究需要开发了很多土地利用变化/覆盖(LUCC)模型。但迄今没有一个单独的模型可在不同时空尺度上揭示所有土地利用变化的关键过程。本文尝试开发一种集成SD模型与CLUE-S模型的建模方法,用以弥补已有LUCC模型缺陷,并将其应用于张掖市甘州区的土地利用情景分析中,得到的LUCC模拟结果可为该区土地利用规划和环境管理提供一定的决策支持,同时为基于不同LUCC下垫面的水文过程情景分...
Manganese evolution in Omega Centauri: a clue to the cluster formation mechanisms?
nuclear reactions nucleosynthesis abundances – galaxies: evolution – globular clusters: individual: ω Centauri
2011/10/18
We model the evolution of manganese relative to iron in the progenitor system of the globular cluster Omega Centauri by means of a self-consistent chemical evolution model. We use stellar yields that ...
基于CLUE-S模型验证的海岸围垦区景观驱动因子贡献率
景观动态 主成分分析 驱动力贡献率 CLUE-S模型模拟
2011/10/20
基于1990、2000、2009年TM影像、社会统计数据、野外调查数据,采用冗余分析和主成分分析方法对长江口奉贤段围垦区海岸带景观动态变化驱动力因子的贡献度进行分析,并利用Kappa指数对CLUE-S模型所选驱动力模拟效力进行验证.结果表明:海岸带围垦区景观动态变化的人为驱动因子贡献度(57.1%)大于自然驱动因子贡献度(42.9%).CLUE-S模型模拟的正确率达82%,研究区主要景观类型(耕地...
Physicists find new clue in coronal heating mystery（图）
Physicists new clue coronal heating mystery
2011/1/21
The corona, the vast gossamer atmosphere of plasma visible from Earth during a total solar eclipse, can notch up temperatures in excess of one million degrees Kelvin (MK). Several rival explanations h...
As the last ice age was ending, about 13,000 years ago, a final blast of cold hit Europe, and for a thousand years or more, it felt like the ice age had returned. But oddly, despite bitter cold winter...
Solitary wave in a Burridge-Knopoff model with slip-dependent friction as a clue to understanding the mechanism of the self-healing slip pulse in an earthquake rupture process
Solitary wave Burridge-Knopoff model slip-dependent friction earthquake rupture process
2009/11/13
A one-dimensional Burridge-Knopoff spring-block model with slip-dependent friction was studied to explore the possibility of a solitary wave solution existing for the problem of earthquake faulting. T...
It is a phenomenon that has puzzled people for thousands of years and drove Benjamin Franklin to risk his kite and life in search of answers. Now, a trio of researchers in America may have finally fou...
土地利用变化空间模拟的进展——CLUE-S 模型及其应用
土地利用
2007/8/24
土地利用变化的空间模拟是进行土地利用情景分析的重要基础。本文在介绍了国际上常用的细胞自控模型（CA）、土地利用变化及效应模型（CLUE）的基础上，重点分析了小尺度土地利用变化及效应模型（CLUE-S）的方法，并以邯郸地区为例进行了案例研究。认为CLUE-S模型采取经验模型的方法，通过建立土地利用空间分配和驱动因子之间的统计关系模拟近期土地利用变化的情景。同时也考虑了不同土地...
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Solitary wave in a Burridge-Knopoff model with slip-dependent friction as a clue to understanding the mechanism of teh self-healing slip pulse in an earthquake rupture process
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英文
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