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相关概念视频

Migration00:53

Migration

8.1K
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
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Anatomical Movements00:51

Anatomical Movements

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Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints.
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist,...
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Mechanistic Models: Compartment Models in Individual and Population Analysis01:23

Mechanistic Models: Compartment Models in Individual and Population Analysis

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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...
359
Movement Joints in Buildings01:27

Movement Joints in Buildings

487
Movement joints in buildings are essential design elements that accommodate inevitable motions caused by various factors such as temperature changes, moisture content variations, and structural deflections. These motions, if not considered in design and construction, can lead to unsightly or dangerous damage. Movement joints are incorporated in different forms to manage these stresses and allow materials to move without causing distress.
The simplest type of movement joints, working joints, are...
487
Impact of Individuals on Individuals01:30

Impact of Individuals on Individuals

515
Human behavior is intricately shaped by social influences that arise from interactions with others in diverse contexts. These influences not only mold beliefs and attitudes but also drive the regulation of behaviors through both direct communication and observational learning. The study of these processes falls within the domain of social psychology, which seeks to understand how individuals are affected by and affect those around them.Mechanisms of Social InfluenceDirect social influence...
515
Impact of Social Context on Individuals01:21

Impact of Social Context on Individuals

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Social psychology examines how the real or imagined presence of others influences individuals' thoughts, feelings, and behaviors. A key concept in this field is the role of social context in shaping behavior. The same individual may act differently depending on the social setting, due to the varying expectations and norms associated with each environment. This context-dependent behavior illustrates the influence of social roles, which prescribe appropriate conduct in specific situations.Social...
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相关实验视频

Updated: May 1, 2026

Trajectory Data Analyses for Pedestrian Space-time Activity Study
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Trajectory Data Analyses for Pedestrian Space-time Activity Study

Published on: February 25, 2013

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了解个体的人类移动模式.

Marta C González1, César A Hidalgo, Albert-László Barabási

  • 1Center for Complex Network Research and Department of Physics, Biology and Computer Science, Northeastern University, Boston, Massachusetts 02115, USA.

Nature
|June 6, 2008
PubMed
概括

人类的运动不是随机的. 手机数据显示,个人有定期的旅行模式,经常返回特定地点,挑战现有模型并影响城市规划和疾病传播预测.

科学领域:

  • 复杂的系统复杂的系统.
  • 人类流动性研究 人类流动性研究
  • 计算社会科学 计算社会科学

背景情况:

  • 了解人类运动对于城市规划,交通预测和疾病传播建模至关重要.
  • 当前的模型通常假定随机运动,如莱维飞行或随机散步,这可能不准确地反映现实世界的人类行为.

研究的目的:

  • 通过使用大规模的时间解析位置数据,研究控制人类运动的基本规律.
  • 将实证人类轨迹与随机步行和莱维飞行模型的预测进行比较.

主要方法:

  • 在六个月的时间里 (100,000用户) 分析了匿名的手机用户轨迹.
  • 对个体运动模式的空间和时间规律的统计分析.
  • 针对个体行驶距离和轨道异构性进行校正.

主要成果:

  • 人类轨迹表现出显著的时间和空间规律性,偏离随机模型.
  • 个人表现出一种特征,时间独立的旅行距离,以及返回常见地点的可能性很高.
  • 规范化的个体旅行模式崩成一个单一的,普遍的空间概率分布.

结论:

  • 人类的流动性遵循简单的,可重复的模式,尽管不同的旅行历史.

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  • 这些发现对疫情预防,应急响应,城市规划和基于代理物的建模具有重大意义.
  • 该研究强调了当前基于随机的人类运动模型的局限性.