Data reduction is the transformation of numerical or alphabetical digital information derived empirically or experimentally into a corrected, ordered, and simplified form. The purpose of data reduction can be two-fold: reduce the number of data records by eliminating invalid data or produce summary data and statistics at different aggregation levels for various applications. When information is derived from instrument readings there may also be a transformation from analog to digital form. When the data are already in digital form the 'reduction' of the data typically involves some editing, scaling, encoding, sorting, collating, and producing tabular summaries. When the observations are discrete but the underlying phenomenon is continuous then smoothing and interpolation are often needed. The data reduction is often undertaken in the presence of reading or measurement errors. Some idea of the nature of these errors is needed before the most likely value may be determined. An example in astronomy is the data reduction in the Kepler satellite. This satellite records 95-megapixel images once every six seconds, generating dozens of megabytes of data per second, which is orders-of-magnitudes more than the downlink bandwidth of 550 kB/s. The on-board data reduction encompasses co-adding the raw frames for thirty minutes, reducing the bandwidth by a factor of 300. Furthermore, interesting targets are pre-selected and only the relevant pixels are processed, which is 6% of the total. This reduced data is then sent to Earth where it is processed further. Research has also been carried out on the use of data reduction in wearable (wireless) devices for health monitoring and diagnosis applications. For example, in the context of epilepsy diagnosis, data reduction has been used to increase the battery lifetime of a wearable EEG device by selecting and only transmitting, EEG data that is relevant for diagnosis and discarding background activity. (Wikipedia).
Percent of a unknown number - percentage math lesson
Work out percent problems of an unknown amount with this fast math lesson. This video shows how to easily solve percentage problems and looks at how to convert percentages to fractions and percentages and fractions to decimals. This lesson shows two methods for working out the problems -
From playlist Fractions, percentages and decimals
Learn how to convert a fraction to a decimal
👉 Learn how to convert between decimals, fractions, and percentages. Numbers can be converted between decimals, fractions, and percents. To convert a number written in decimals to fractions, we write the number without the decimal point as the numerator and a denominator equivalent to a mu
From playlist How to convert decimals, fractions and percents
Learn how to convert a fraction to a decimal and percent
👉 Learn how to convert between decimals, fractions, and percentages. Numbers can be converted between decimals, fractions, and percents. To convert a number written in decimals to fractions, we write the number without the decimal point as the numerator and a denominator equivalent to a mu
From playlist How to convert decimals, fractions and percents
Learn how to subtract a larger decimal from a smaller decimal
👉 You will learn how to add and subtract numbers in decimal form. When adding and subtracting decimals it is very important to align the decimal points and use zero as space holders. Then you will apply the operations just like we do in multi-digit operations but keep track of the decima
From playlist Decimals
How to convert a fraction into a decimal and then a percent
👉 Learn how to convert between decimals, fractions, and percentages. Numbers can be converted between decimals, fractions, and percents. To convert a number written in decimals to fractions, we write the number without the decimal point as the numerator and a denominator equivalent to a mu
From playlist How to convert decimals, fractions and percents
Learn how to multiply a three digit decimal to a two digit decimal
👉 You will learn how to multiply numbers in decimal form. We will work with decimals that are greater and less than one. When multiplying decimals it is important to line up the decimal point so that you keep the place values of the numbers. We will apply multi digit multiplication to f
From playlist How to multiply and divide decimals
How to write a fraction as a decimal
👉 Learn how to convert between decimals, fractions, and percentages. Numbers can be converted between decimals, fractions, and percents. To convert a number written in decimals to fractions, we write the number without the decimal point as the numerator and a denominator equivalent to a mu
From playlist How to convert decimals, fractions and percents
Writing a percent as a decimal and as a fraction
👉 Learn how to convert between decimals, fractions, and percentages. Numbers can be converted between decimals, fractions, and percents. To convert a number written in decimals to fractions, we write the number without the decimal point as the numerator and a denominator equivalent to a mu
From playlist How to convert decimals, fractions and percents
DDPS | Model order reduction assisted by deep neural networks (ROM-net)
In this talk from June 10, 2021, David Ryckelynck of MINES ParisTech University discusses a general framework for projection-based model order reduction assisted by deep neural networks. The proposed methodology, called ROM-net [1], consists in using deep learning techniques to adapt the
From playlist Data-driven Physical Simulations (DDPS) Seminar Series
Learn How To Reduce A Fraction In 7 Minutes
Reducing a fraction is a basic math skill that all students will need to understand as they progress in school and life. This video will show you exactly how to reduce a fraction. Specifically, you will see how to factor the numerator and denominator and cross cancel like factors. Need mo
From playlist Pre-Algebra
The code is accesible at https://github.com/sepinouda/Machine-Learning
From playlist Machine Learning Course
Bala Krishnamoorthy (10/20/20): Dimension reduction: An overview
Bala Krishnamoorthy (10/20/20): Dimension reduction: An overview Title: Dimension reduction: An overview Abstract: We present a broad overview of various dimension reduction techniques. Referred to also as manifold learning, we review linear dimension reduction techniques, e.g., principa
From playlist Tutorials
2014 GCEP Distinguished Student Lecturers | CO2 and CO Reduction on Oxide-Derived Copper
Chemistry Ph.D. candidate Christina Li discusses her work implementing a closed CO2 recycling system that converts CO2 into a usable fuel rather than re-emitting it into the atmosphere. Li was one of three Distinguished Student Lecturers to present at the 2014 Global Climate and Energy Pr
From playlist GCEP Symposium 2014
Dimensionality Reduction : Data Science Concepts
Why would we want to reduce the number of features ? And how do we do it ? PCA Video : https://www.youtube.com/watch?v=dhK8nbtii6I LASSO Video : https://www.youtube.com/watch?v=jbwSCwoT51M My Patreon : https://www.patreon.com/user?u=49277905
From playlist Data Science Concepts
Stanford Seminar - Data Analytics at the Exascale for Free Electron Lasers Project
Jana B. Thayer SLAC, Stanford University March 4, 2020 The increase in velocity, volume, and complexity of the data generated by the upcoming Linac Coherent Light Source upgrade (LCLS-II) at the SLAC National Accelerator Laboratory presents a considerable challenge for data acquisition, d
From playlist Stanford EE380-Colloquium on Computer Systems - Seminar Series
Short introduction to Bayesian Evidential Learning: a protocol for uncertainty quantification
From playlist Bayesian Evidential Learning
Hengrui Luo (7/27/20): Generalized penalty for circular coordinate representation
Title: Generalized penalty for circular coordinate representation Abstract: Topological Data Analysis (TDA) provides novel approaches that allow us to analyze the geometrical shapes and topological structures of a dataset. As one important application, TDA can be used for data visualizati
From playlist ATMCS/AATRN 2020
This video explains how to multiply decimals. http://mathispower4u.wordpress.com/
From playlist Number Sense - Decimals, Percents, and Ratios