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相关概念视频

Population Growth00:57

Population Growth

27.8K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
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Selected Data About Geographic Locations01:25

Selected Data About Geographic Locations

261
Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...
261
Distributions to Estimate Population Parameter01:26

Distributions to Estimate Population Parameter

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The accurate values of population parameters such as population proportion, population mean, and population standard deviation (or variance) are usually unknown. These are fixed values that can only be estimated from the data collected from the samples. The estimates of each of these parameters are sample proportion, the sample mean, and sample standard deviation (or variance). To obtain the values of these sample statistics, data are required that have particular distribution and central...
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GIS Software, Hardware, and Sources of GIS Data01:23

GIS Software, Hardware, and Sources of GIS Data

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A Geographic Information System (GIS) combines specialized software and hardware to effectively manage, analyze, and present spatial and related data. GIS software includes critical functionalities such as a user interface for easy navigation, database management tools for handling spatial and attribute data, and data retrieval features for efficient access. Analytical tools transform raw data into insights, while display functions produce maps and reports in various formats for effective...
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Model Approaches for Pharmacokinetic Data: Distributed Parameter Models01:06

Model Approaches for Pharmacokinetic Data: Distributed Parameter Models

242
Pharmacokinetic models are mathematical constructs that represent and predict the time course of drug concentrations in the body, providing meaningful pharmacokinetic parameters. These models are categorized into compartment, physiological, and distributed parameter models.
The distributed parameter models are specifically designed to account for variations and differences in some drug classes. This model is particularly useful for assessing regional concentrations of anticancer or...
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Growth Models with Integration: Problem Solving01:27

Growth Models with Integration: Problem Solving

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In population modeling, integration provides a systematic way to determine accumulated quantities from known rates of change. One such application arises in ecology, where the total weight of a fish population in a body of water is referred to as its biomass. When the rate of growth of this biomass is known as a function of time, calculus can be used to determine the total biomass at a future date.Growth Rate and Biomass FunctionLet the growth rate of the fish population be represented by a...
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相关实验视频

Updated: Jan 17, 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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全球网格式的多时间数据集,以支持人类人口分布建模.

Dorothea Woods1, Tom McKeen1, Alexander Cunningham1

  • 1University of Southampton, Southampton, England, UK.

Gates open research
|September 22, 2025
PubMed
概括
此摘要是机器生成的。

高分辨率的网格化人口数据对于理解人口变化至关重要. 本研究提出了协调的全球地理空间数据集,以改善小区域人口密度绘制和政策信息.

关键词:
空间人口统计学;地理空间共变量;高分辨率网格数据;人类人口;次国家;全球;空间数据集;多时间.

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Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM
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A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
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Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM
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科学领域:

  • 地理信息系统 (GIS) 是指地理信息系统.
  • 人口统计学 人口统计学
  • 环境科学 环境科学

背景情况:

  • 人口分布显示出显著的空间和时间变化,需要高分辨率的人口统计数据.
  • 人口动态的变化,城市化和移民给准确的人口绘制带来了挑战.
  • 小区域人口建模依赖于详细的地理空间辅助数据集来分类面积单位计数.

研究的目的:

  • 描述一个广泛的协调全球地理空间数据集的集合.
  • 为了推动绘制小区域人口密度变化的地图的改进.
  • 支持人口建模和环境,经济和卫生领域的应用.

主要方法:

  • 73个单独的网格数据集的时空和空间协调.
  • 整合各种地理空间数据,包括地形,气候,土地覆盖和基础设施.
  • 以3弧秒 (~100m) 的空间分辨率创建年度时间序列数据集.

主要成果:

  • 已经创建了一个全球,高分辨率,时空协调的地理空间数据集的开放访问存储库.
  • 数据集涵盖地形,气候,夜间照明,土地覆盖,内陆水,基础设施,保护区和建筑环境.
  • 年度时间序列数据可从2015年到至少2020年,并在可能的情况下直到2023年.

结论:

  • 开发的数据集对于加强小区域人口密度测绘至关重要.
  • 这些资源支持为可持续发展提供明智的政策制定和资源分配.
  • 这些数据集有助于跨学科的环境,经济和健康领域的研究.