Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Predicting Products: Substitution vs. Elimination02:52

Predicting Products: Substitution vs. Elimination

11.4K
When a nucleophile and an alkyl halide react, nucleophilic substitution and β-elimination reactions compete to generate products.
The following factors can influence the mechanisms competing against each other:
11.4K
Levels of Use of a GIS01:29

Levels of Use of a GIS

37
Geographic Information Systems (GIS) operate across three levels of application, each representing an increasing degree of complexity: data management, analysis, and prediction. These levels reflect the expanding functionality and versatility of GIS technology in handling spatial data for diverse purposes.Data ManagementAt its foundational level, GIS serves as a tool for data management, enabling the input, storage, retrieval, and organization of spatial data. This level is often employed in...
37
Multicompartment Models: Overview01:14

Multicompartment Models: Overview

76
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.
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
76
Decision Making: P-value Method01:09

Decision Making: P-value Method

5.2K
The process of hypothesis testing based on the P-value method includes calculating the P- value using the sample data and interpreting it.
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim  is also stated. These statements can act as null and alternative hypotheses:  a null hypothesis would be a neutral statement while the alternative hypothesis can...
5.2K
Base Quantities and Derived Quantities01:14

Base Quantities and Derived Quantities

19.7K
In any system of units, the units for some physical quantities must be specified through a measurement process. These measurements are the base quantities of the system, and their units are the base units of the system. The algebraic combinations of the base values can then be used to express all other physical quantities. Each of these physical quantities is then referred to as a derived quantity, with each unit being referred to as a derived unit.
The International Organization for...
19.7K
Vector Product (Cross Product)01:17

Vector Product (Cross Product)

9.3K
Vector multiplication of two vectors yields a vector product, with the magnitude equal to the product of the individual vectors multiplied by the sine of the angle between both the vectors and the direction perpendicular to both the individual vectors. As there are always two directions perpendicular to a given plane, one on each side, the direction of the vector product is governed by the right-hand thumb rule.
Consider the cross product of two vectors. Imagine rotating the first vector about...
9.3K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

The disparities and development trajectories of nations in achieving the sustainable development goals.

Nature communications·2025
Same author

Augmenting the availability of historical GDP per capita estimates through machine learning.

Proceedings of the National Academy of Sciences of the United States of America·2024
Same author

Estimating digital product trade through corporate revenue data.

Nature communications·2024
Same author

Understanding political divisiveness using online participation data from the 2022 French and Brazilian presidential elections.

Nature human behaviour·2023
Same author

Evaluation of the Effect of Binary Fly Ash-Lime Mixture on the Bearing Capacity of Natural Soils: A Comparison with Two Conventional Stabilizers Lime and Portland Cement.

Materials (Basel, Switzerland)·2023
Same author

Complex economic activities concentrate in large cities.

Nature human behaviour·2020
Same journal

Stigmergic influence of simple bots on human cooperation in digital environments.

EPJ data science·2026
Same journal

Recovering scheduling preferences in dynamic departure time models.

EPJ data science·2026
Same journal

Not your mean green: beyond averages in mapping socio-spatial inequities in urban greenery for smart cities.

EPJ data science·2026
Same journal

Generative AI voting: fair collective choice is resilient to LLM biases and inconsistencies.

EPJ data science·2026
Same journal

An agent-based model to investigate the effects of urban segregation around the clock on inequalities in health behaviour.

EPJ data science·2026
Same journal

The news in black and white: word embeddings quantify racism in South African news.

EPJ data science·2025
查看所有相关文章

相关实验视频

Updated: May 22, 2025

A Soft Tooling Process Chain for Injection Molding of a 3D Component with Micro Pillars
05:32

A Soft Tooling Process Chain for Injection Molding of a 3D Component with Micro Pillars

Published on: August 4, 2018

12.5K

在产品层面绘制全球价值链的地图.

Lea Karbevska1,2, César A Hidalgo1,3

  • 1Center for Collective Learning, IAST, Toulouse School of Economics, 1 Esplanade de l'Universite, Toulouse, 31080 France.

EPJ data science
|March 17, 2025
PubMed
概括
此摘要是机器生成的。

本研究引入了一种新的机器学习方法,用于创建产品级全球价值链数据. 这种方法从国际贸易模式中推断价值链关系,解决了经济分析中的一个关键差距.

关键词:
全球价值链的全球价值链.网络 网络 网络 网络 网络 网络产品 产品 产品 产品 产品供应链中的供应链.贸易 贸易 贸易 贸易

更多相关视频

Operation of the Collaborative Composite Manufacturing CCM System
10:09

Operation of the Collaborative Composite Manufacturing CCM System

Published on: October 1, 2019

6.5K
Mass Spectrometry-Guided Genome Mining as a Tool to Uncover Novel Natural Products
11:13

Mass Spectrometry-Guided Genome Mining as a Tool to Uncover Novel Natural Products

Published on: March 12, 2020

10.8K

相关实验视频

Last Updated: May 22, 2025

A Soft Tooling Process Chain for Injection Molding of a 3D Component with Micro Pillars
05:32

A Soft Tooling Process Chain for Injection Molding of a 3D Component with Micro Pillars

Published on: August 4, 2018

12.5K
Operation of the Collaborative Composite Manufacturing CCM System
10:09

Operation of the Collaborative Composite Manufacturing CCM System

Published on: October 1, 2019

6.5K
Mass Spectrometry-Guided Genome Mining as a Tool to Uncover Novel Natural Products
11:13

Mass Spectrometry-Guided Genome Mining as a Tool to Uncover Novel Natural Products

Published on: March 12, 2020

10.8K

科学领域:

  • 经济学 经济学 经济学
  • 计算机科学 计算机科学
  • 国际贸易 国际贸易 国际贸易

背景情况:

  • 现有的价值链数据集汇总了工业部门,缺乏产品特定细节.
  • 这限制了对经济中断和供应链漏洞的理解.
  • 公开可用的数据往往缺乏详细的产品级价值链信息.

研究的目的:

  • 开发一种用于推断产品水平价值链关系的新方法.
  • 为分析全球价值链创建一个更细致的数据集.
  • 帮助研究人员和政策制定者了解复杂的贸易网络.

主要方法:

  • 利用机器学习和贸易理论原则.
  • 分析了1200多种产品和250个地区的细粒度国际贸易数据 (出口和进口).
  • 开发一个比例分配模型来估计产品级别的贸易流.

主要成果:

  • 成功地从贸易模式中推断出产品级价值链信息.
  • 创建了一种方法,在产品层面近似估计价值链数据.
  • 证明了贸易数据在揭示隐藏的价值链结构方面的实用性.

结论:

  • 开发的方法为近似产品级价值链数据提供了有价值的工具.
  • 这种方法增强了对全球价值链,贸易和可持续发展的分析.
  • 解决了对精细数据的关键需求,以应对经济复杂性.