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

Classification of Systems-I01:26

Classification of Systems-I

188
Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
188
Classification of Systems-II01:31

Classification of Systems-II

146
Continuous-time systems have continuous input and output signals, with time measured continuously. These systems are generally defined by differential or algebraic equations. For instance, in an RC circuit, the relationship between input and output voltage is expressed through a differential equation derived from Ohm's law and the capacitor relation,
146
Classification of Signals01:30

Classification of Signals

467
In signal processing, signals are classified based on various characteristics: continuous-time versus discrete-time, periodic versus aperiodic, analog versus digital, and causal versus noncausal. Each category highlights distinct properties crucial for understanding and manipulating signals.
A continuous-time signal holds a value at every instant in time, representing information seamlessly. In contrast, a discrete-time signal holds values only at specific moments, often denoted as x(n), where...
467
Force Classification01:22

Force Classification

1.2K
Forces play a crucial role in the study of physics and engineering. They are essential in describing the motion, behavior, and equilibrium of objects in the physical world. Forces can be classified based on their origin, type, and direction of action.
Contact and non-contact forces are two of the most widely used categories of forces. As the name suggests, contact forces require physical contact between two objects to act upon each other. Examples of contact forces include frictional,...
1.2K
Aggregates Classification01:29

Aggregates Classification

326
Aggregate classification is generally based on its size, petrographic characteristics, weight, and source. Size classification ranges from coarse to fine aggregates, defined by the size of the particles. Coarse aggregates are particles that do not pass through ASTM sieve No. 4, and aggregates that pass through the sieve are fine aggregates.
Petrographic classification groups aggregates based on common mineralogical characteristics. Some of the common mineral groups found in aggregates are...
326
Survival Tree01:19

Survival Tree

87
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
 Building a Survival Tree
Constructing a...
87

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

Safety and feasibility of same-day discharge after peroral endoscopic myotomy in esophageal motility disorders: a systematic review and meta-analysis.

Surgical endoscopy·2026
Same author

Stress ulcer prophylaxis in mechanically ventilated patients.

The American journal of the medical sciences·2026
Same author

Bilateral Superolateral Fracture Dislocation of the Temporomandibular Joint (TMJ) Following Trauma: A Report of a Unique Case.

Cureus·2026
Same author

Evaluating Glucagon-Like Peptide-1 Receptor Agonist Safety Before Upper Endoscopy: A Systematic Review and Meta-Analysis.

Gastroenterology research·2026
Same author

Deep convolutional models for robust multi-crop disease recognition in real-world conditions.

Scientific reports·2026
Same author

Risk factors for bleeding after endoscopic retrograde cholangiopancreatography: a systematic review and meta-analysis.

Gastrointestinal endoscopy·2026
Same journal

A tri-axis optomechanical accelerometer with plasmonic MIM waveguide and structural direction-dependent optical signatures.

Scientific reports·2026
Same journal

Holographic leaky-wave antennas with independently controlled multiple counter-rotating vortex beams.

Scientific reports·2026
Same journal

Differential associations of longitudinal hearing and vision trajectories with dementia and mild cognitive impairment in older adults.

Scientific reports·2026
Same journal

Abdominal obesity and leisure-time sedentary behavior in relation to gastroesophageal reflux disease risk: a prospective cohort study from the UK Biobank.

Scientific reports·2026
Same journal

Effect of nitrogen-rich COF incorporation on the structure and separation performance of polyamide nanofiltration membranes.

Scientific reports·2026
Same journal

Withanolide A inhibits hIAPP aggregation: An In silico, biophysical, and drosophila-based In vivo validation.

Scientific reports·2026
查看所有相关文章

相关实验视频

Updated: Jul 6, 2025

Author Spotlight: UAV Remote Sensing for Efficient Invasive Plant Biomass Estimation
08:47

Author Spotlight: UAV Remote Sensing for Efficient Invasive Plant Biomass Estimation

Published on: February 9, 2024

1.4K

基于遥感的森林覆盖的分类,使用机器学习.

Gouhar Aziz1, Nasru Minallah2, Aamir Saeed1

  • 1Department of Computer Science and Information Technology, University of Engineering and Technology, Peshawar, Pakistan.

Scientific reports
|January 3, 2024
PubMed
概括
此摘要是机器生成的。

巴基斯坦 巴基斯坦 巴基斯坦.

更多相关视频

Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM
12:26

Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM

Published on: October 11, 2016

13.3K
Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment
08:25

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment

Published on: May 7, 2019

9.0K

相关实验视频

Last Updated: Jul 6, 2025

Author Spotlight: UAV Remote Sensing for Efficient Invasive Plant Biomass Estimation
08:47

Author Spotlight: UAV Remote Sensing for Efficient Invasive Plant Biomass Estimation

Published on: February 9, 2024

1.4K
Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM
12:26

Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM

Published on: October 11, 2016

13.3K
Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment
08:25

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment

Published on: May 7, 2019

9.0K

科学领域:

  • 林业和环境科学 林业和环境科学
  • 遥感和地理空间技术的远程检测.
  • 生态学中的人工智能

背景情况:

  • 巴基斯坦的森林覆盖面非常低,低于推的20-30%,主要是由于森林砍伐.
  • 传统的森林估计方法不足以进行有效的监测和监督.
  • 先进的遥感和机器学习为准确的森林评估提供了潜在的解决方案.

研究的目的:

  • 评估遥感和机器学习对巴基斯坦森林覆盖率估计的有效性.
  • 用Sentinel-2卫星图像来比较人工神经网络 (ANN) 和随机森林 (RF) 算法的性能.
  • 为改善保护和管理策略提供准确的森林覆盖数据.

主要方法:

  • 利用了Sentinel-2卫星图像,包括单层和时间层叠加图像.
  • 应用监督分类算法:人工神经网络 (ANN) 和随机森林 (RF).
  • 使用培训和测试数据集的整体准确度和kappa系数评估分类准确度.

主要成果:

  • 时间层叠加图像与射频算法实现了最高的准确性 (99.79%的训练,96.98%的验证).
  • 在阿伯塔巴德地区,ANN和RF算法估计森林覆盖率分别为31.07%和31.17%.
  • 这两种算法都表现出高精度,RF在本研究中略高于ANN.

结论:

  • 先进的遥感技术,特别是Sentinel-2图像,对于森林覆盖面的评估非常有效.
  • 像ANN和RF这样的机器学习算法显著提高了森林监测的准确性和效率.
  • 这项研究为加强巴基斯坦的森林管理和保护工作提供了强有力的方法.