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相关概念视频

Multi-input and Multi-variable systems01:22

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Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
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Multicompartment Models: Overview01:14

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Multicompartment models are mathematical constructs that depict how drugs are distributed and eliminated within the body. They segment the body into several compartments, symbolizing various physiological or anatomical areas connected through drug transfer processes such as absorption, metabolism, distribution, and elimination.
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Econometric Views, often stylized as EViews, is a package that merges statistical analysis with econometric studies. It is designed to provide tools for time series analysis, forecasting, and econometric model simulation. The software originated from MicroTSP software and has evolved significantly since its inception in 1981. The history of EViews is marked by a continuous effort to enhance its computational speed and user interface. It was initially developed for large computing systems but...
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Mechanistic Models: Compartment Models in Individual and Population Analysis01:23

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Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
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In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
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Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
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对个人意见差异的多变量意见演变分析:基于代理的模型模型.

Shan Liu1, Hanfei Zhao1

  • 1Department of Intelligent Science, <a href="https://ror.org/04facbs33">Communication University of China</a>, Beijing 100024, People's Republic of China.

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概括
此摘要是机器生成的。

沉默螺旋理论在数字时代面临着新的挑战. 社交媒体上出现了一种沉默的反螺旋,可能导致意见分歧并影响公众论的演变.

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科学领域:

  • 社会科学 社会科学 社会科学
  • 计算社会科学 计算社会科学
  • 网络科学 网络科学

背景情况:

  • 沉默的螺旋理论,源于大众媒体,建议压制意见以避免社会排斥.
  • 社交媒体引入了一个沉默的反螺旋,由自我意识和在线匿名驱动.
  • 这些相反的力量之间的相互作用在数字网络中塑造了公众论.

研究的目的:

  • 调查社交网络中沉默螺旋和沉默反螺旋之间的竞争.
  • 提出和验证一个模型来量化这些现象及其对论的影响.
  • 探讨意见分歧或一致性占主导地位的条件.

主要方法:

  • 螺旋竞争模型 (SCM) 的发展,包括伪观点和反观点.
  • 基于三角关闭的时间变化的网络拓算法的实现.
  • 使用埃尔多斯-雷尼随机网络进行模拟分析,并使用新浪微博数据进行验证.

主要成果:

  • 沉默的反螺旋可以导致意见分歧显著,挑战现状.
  • 如果沉默的反螺旋不占上风,扭转论趋势将变得困难.
  • 该模型展示了在线社交网络中意见形成的复杂动态.

结论:

  • 个人意识和在线平台可以促进意见多元化.
  • 了解这些螺旋之间的平衡对于预测论至关重要.
  • 这项研究提供了关于数字时代公共话语演变的见解.