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

Expected Frequencies in Goodness-of-Fit Tests01:19

Expected Frequencies in Goodness-of-Fit Tests

2.6K
A goodness-of-fit test is conducted to determine whether the observed frequency values are statistically similar to the frequencies expected for the dataset. Suppose the expected frequencies for a dataset are equal such as when predicting the frequency of any number appearing when casting a die. In that case, the expected frequency is the ratio of the total number of observations (n)  to the number of categories (k).
2.6K
Properties of Fourier series I01:20

Properties of Fourier series I

330
The Fourier series is a powerful tool in signal processing and communications, allowing periodic signals to be expressed as sums of sine and cosine functions. A foundational property of the Fourier series is linearity. If we consider two periodic signals, their linear combination results in a new signal whose Fourier coefficients are simply the corresponding linear combinations of the original signals' coefficients. This property is crucial in applications like frequency modulation (FM)...
330
Frequency Response of a Circuit01:20

Frequency Response of a Circuit

308
Inductive circuits present intriguing challenges in electrical engineering, particularly during the transition from the time domain to the frequency domain. This transformation involves converting inductors into impedances and utilizing phasor representation.
The transfer function is pivotal in characterizing how these circuits react to various frequencies, facilitating a profound understanding of their behavior. An essential parameter is the time constant, signifying the...
308
Network Function of a Circuit01:25

Network Function of a Circuit

312
Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
312
Passive Filters01:27

Passive Filters

556
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
556
Properties of Fourier Transform I01:21

Properties of Fourier Transform I

193
The application of Fourier Transform properties in radio broadcasting is multifaceted, enabling significant advancements in the way signals are transmitted and received. Key areas where these properties are utilized include simultaneous multi-channel transmission, audio clip speed adjustments, live broadcast delays for different time zones, audio frequency adjustments, and signal demodulation.
In radio broadcasting, multiple audio signals often need to be transmitted simultaneously. The Fourier...
193

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

Global approaches to infectious disease surveillance and modeling.

Nature medicine·2026
Same author

HIV Transmission in a Declining African Epidemic.

medRxiv : the preprint server for health sciences·2026
Same author

First Detection of Human- and Dog-Associated <i>Demodex</i> Mites (Acari, Arachnida) in Southern European Wolves (<i>Canis lupus</i>).

Pathogens (Basel, Switzerland)·2026
Same author

Overdominance for fitness: a genomic comparison between empirical and simulated data with Drosophila melanogaster.

Genetics·2026
Same author

Repeated losses of self-fertility shaped heterozygosity and polyploidy in yeast evolution.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Footprints of Worldwide Adaptation in Structured Populations of Drosophila melanogaster Through the Expanded DEST 2.0 Genomic Resource.

Molecular biology and evolution·2025

相关实验视频

Updated: Jul 15, 2025

Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels
10:00

Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels

Published on: June 2, 2020

21.0K

基于现场频谱的中立性测试的一般框架.

Sebastián E Ramos-Onsins1, Giacomo Marmorini2,3, Guillaume Achaz4

  • 1Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, 08193 Bellaterra, Spain.

Genes
|September 28, 2023
PubMed
概括

种群遗传学家需要敏感的统计工具来测试中性进化模型. 本研究引入了新的可调节的线性和非线性中性测试,以提高准确性和解释性,无论样本大小如何.

关键词:
凝聚的理论凝聚的理论.中立性测试试验 中立性测试试验网站频谱频谱的频谱.统计能力的统计能力.总结统计的总结统计.

更多相关视频

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
06:43

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band

Published on: May 2, 2018

7.1K
Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

3.1K

相关实验视频

Last Updated: Jul 15, 2025

Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels
10:00

Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels

Published on: June 2, 2020

21.0K
Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
06:43

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band

Published on: May 2, 2018

7.1K
Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

3.1K

科学领域:

  • 人口遗传学 人口遗传学
  • 进化生物学 进化生物学
  • 统计遗传学 统计遗传学

背景情况:

  • 准确的统计工具对于人口遗传学家来说至关重要,以评估中性进化的赖特-费舍尔模型.
  • 现有的中性测试 (例如,Tajima的D,Fu和Li的F和D,Fay和Wu的H) 检测到特定的偏差,但缺乏优化统一的框架.
  • 与样本大小的可扩展性是可靠解释中立性测试结果的关键属性.

研究的目的:

  • 为线性和非线性中性测试的结构和特性提供全面的讨论.
  • 引入一个优化线性测试的一般框架,从而形成一个可调节的中性测试的新家族.
  • 将这个框架扩展到非线性中性测试,并推导出最佳的非线性测试.

主要方法:

  • 对线性中性测试的一般框架进行审查和讨论.
  • 为优化线性测试制定一个通用框架,重点关注可性.
  • 将框架扩展到非线性中性测试,为频谱的多项式函数推导出最佳的非线性测试.

主要成果:

  • 确定了样本大小可扩展性对于准确解释中立性测试的重要性.
  • 引入了可调节的线性中性测试的新家族.
  • 推导出适用于频谱的各种多项式度的非线性最佳中性测试的一般框架.

结论:

  • 开发的框架为构建和优化中立性测试提供了更一般的方法.
  • 新的可调节线性和非线性测试为人口遗传分析提供了更强大和更灵活的工具.
  • 这些进步提高了检测与中性进化的偏差的能力,并准确地解释遗传数据.