Information theory

Oversampling

In signal processing, oversampling is the process of sampling a signal at a sampling frequency significantly higher than the Nyquist rate. Theoretically, a bandwidth-limited signal can be perfectly reconstructed if sampled at the Nyquist rate or above it. The Nyquist rate is defined as twice the bandwidth of the signal. Oversampling is capable of improving resolution and signal-to-noise ratio, and can be helpful in avoiding aliasing and phase distortion by relaxing anti-aliasing filter performance requirements. A signal is said to be oversampled by a factor of N if it is sampled at N times the Nyquist rate. (Wikipedia).

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Outtakes

Yes. I make mistakes ... rarely. http://www.flippingphysics.com

From playlist Miscellaneous

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Underactive thyroid.mov

An general explanation of the underactive thyroid.

From playlist For Patients

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Which Is Worse: Underpopulation Or Overpopulation?

This video was made in partnership with Gates Ventures. The human population of the world will soon peak – and then decrease – thanks to a combination of two quickly changing economic and educational trends. LEARN MORE ************** To learn more about this topic, start your googling wi

From playlist Policy

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IDEspinner Buffer Overflows pt1

This movie tries to show how you can create a bufferoverflow Credits go out to IDEspinner

From playlist Buffer overflow

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Rearrange a series

In this video, I define what it means to rearrange (or reshuffle) a series and show that if a series converges absolutely, then any rearrangement of the series converges to the same limit. Interesting Consequence: https://youtu.be/Mw7ocynGVmw Series Playlist: https://www.youtube.com/play

From playlist Series

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Machine Learning with Imbalanced Data - Part 3 (Over-sampling, SMOTE, and Imbalanced-learn)

In this video, we discuss the class imbalance problem and how to use over-sampling methods to address this problem. We use the thyroid data set and the logistic regression classifier to train binary classifiers on the original data set and the preprocessed data. We discuss uniform sampling

From playlist Machine Learning with Imbalanced Data - Dr. Data Science Series

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This is why you should care about unbalanced data .. as a data scientist

What do you do when your data has lots more negative examples than positive ones? Link to Code : https://github.com/ritvikmath/YouTubeVideoCode/blob/main/Unbalanced%20Data.ipynb My Patreon : https://www.patreon.com/user?u=49277905

From playlist Data Science Concepts

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Data leakage during data preparation? | Using AntiPatterns to avoid MLOps Mistakes

How can data leakage happen during data preparation? Find out here, where Ms. Coffee Bean is visualizing the answer to this question -- as it was answered by the paper “Using AntiPatterns to avoid MLOps Mistakes”. Paper explained 📄: Muralidhar, Nikhil, Sathappah Muthiah, Patrick Butler, M

From playlist Explained AI/ML in your Coffee Break

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Randomized SVD: Power Iterations and Oversampling

This video discusses the randomized SVD and how to make it more accurate with power iterations (multiple passes through the data matrix) and oversampling. Book Website: http://databookuw.com Book PDF: http://databookuw.com/databook.pdf These lectures follow Chapter 1 from: "Data-Drive

From playlist Data-Driven Science and Engineering

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John Miao - Coherent Diffractive Imaging: A Unification of Microscopy, Diffraction and Computation

Recorded 13 September 2022. Jianwei Miao of the University of California, Los Angeles, presents "Coherent Diffractive Imaging: A Unification of Microscopy, Diffraction and Computation" at IPAM's Computational Microscopy Tutorials. Learn more online at: http://www.ipam.ucla.edu/programs/wor

From playlist Tutorials: Computational Microscopy 2022

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What is an enlargement dilation

👉 Learn about dilations. Dilation is the transformation of a shape by a scale factor to produce an image that is similar to the original shape but is different in size from the original shape. A dilation that creates a larger image is called an enlargement or a stretch while a dilation tha

From playlist Transformations

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How to deal with Imbalanced Datasets in PyTorch - Weighted Random Sampler Tutorial

In this video we take a look at how to solve the super common problem of having an imbalanced or skewed dataset, specifically we look at two methods namely oversampling and class weighting and how to do them both in PyTorch. Toy dataset used in video: https://www.kaggle.com/dataset/77934f

From playlist PyTorch Tutorials

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What are dilations

👉 Learn about dilations. Dilation is the transformation of a shape by a scale factor to produce an image that is similar to the original shape but is different in size from the original shape. A dilation that creates a larger image is called an enlargement or a stretch while a dilation tha

From playlist Transformations

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Machine Learning with Imbalanced Data - Part 5 (Ensemble learning, Bagging classifier)

In this video, we discuss the use of ensemble learning strategies to address the class imbalance problem. Therefore, one can use a combination of data-level preprocessing methods and cost-sensitive learning to improve the performance of classifiers on class-imbalanced data sets. #Imbalan

From playlist Machine Learning with Imbalanced Data - Dr. Data Science Series

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Reasonable samples | Statistical studies | Probability and Statistics | Khan Academy

To make a valid conclusion, you'll need a representative, not skewed, sample. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/probability/statistical-studies/statistical-questions/e/valid-claims?utm_source=YT&utm_medium=Desc&utm_campaign=Proba

From playlist High school statistics | High School Math | Khan Academy

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Oversampling Example

http://AllSignalProcessing.com for more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Illustration of the benefits of oversampling signals when using practical analog anti-aliasing and anti-imaging filters.

From playlist Sampling and Reconstruction of Signals

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Machine Learning for Everybody – Full Course

Learn Machine Learning in a way that is accessible to absolute beginners. You will learn the basics of Machine Learning and how to use TensorFlow to implement many different concepts. ✏️ Kylie Ying developed this course. Check out her channel: https://www.youtube.com/c/YCubed ⭐️ Code and

From playlist Data Science

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Overfitting 1: over-fitting and under-fitting

[http://bit.ly/overfit] When building a learning algorithm, we want it to work well on the future data, not on the training data. Many algorithms will make perfect predictions on the training data, but perform poorly on the future data. This is known as overfitting. In this video we provid

From playlist Overfitting

Related pages

Noise shaping | Signal processing | Low-pass filter | Quantization (signal processing) | Undersampling | Hertz | Dynamic range | Noise power | Nyquist rate | Reconstruction filter | Aliasing | Sampling (signal processing) | Signal | Nyquist–Shannon sampling theorem | Supersampling | Anti-aliasing filter | Transition band | Bandwidth (signal processing) | Signal-to-noise ratio | Upsampling | Digital filter