MEMS accelerometers and gyroscopes - we understand the specification

 3r31559. 3r3-31. “Houston, we have problems,” a tired voice sounded in the brain trying to wade through the Datasheet IMU MPU-9250 from InvenSense at night. When all words are separately understood, but their interrelation is confused to impossibility. It all started with the LSB parameter, about which I only vaguely remembered that the translation is Least Significant Bit. Then went “Resolution”, “Sensitivity”, and even further I realized that the resulting text can already be titled “Datasheet for dummies”. 3r31450.  3r31559. ...
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New evidence demonstrates the existence of two types of infinite curves

The work of Alexander Smith on the Goldfeld hypothesis revealed the fundamental properties of elliptic curves

3r3144.  3r3154. New evidence demonstrates the existence of two types of infinite curves Two elliptic curves demonstrate the strangeness of the concept of rank. The curve on the left is described by the equation y 2 = x 3r33031. 3 [/sup] + ? passes only through five rational points and has rank 0. The curve on the right is described by the equation y 2 = x 3r33031. 3 [/sup] + ? passes through an infinite number of rational points, and has rank 1. [/i] 3r3144.  3r3154. 3r3144.  3r3154. There are many variants of elliptic curves, but there are only two real ...[/h]
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Creating maps of the noise functions

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Fuzzy logic against PID. We cross a hedgehog and a snake. Aircraft engine and control algorithms for nuclear power plants

Fuzzy logic against PID. We cross a hedgehog and a snake. Aircraft engine and control algorithms for nuclear power plants 
3r3-31. 3r38080. Probably, everyone who studied the theory of automatic control often had doubts about how these two, three or even ten squares of transfer functions in a model represent the dynamics of a complex unit, such as a nuclear reactor or an aircraft engine. Is there no cheating here? It is possible that working with simple models will cease to work with complex models in "real" life.
3r3678.  
3r38080. In this article, we will experiment with the “real” model of an aircraft engine. Having weighed it with “real” models of equipment and control algorithms from a nuclear power plant.
3r3678...
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The calculation of the weight spectrum of a linear subspace in Wolfram Mathematica

 3r31149. 3r3-31. 3r31134. The calculation of the weight spectrum of a linear subspace in Wolfram Mathematica 3r31137. 3r31132.  3r31149.
The root cause of r3r31127. 3r31132.  3r31149. 3r31134. This article owes its appearance to one rather long-standing question that was asked in the Wolfram Mathematica group of Russian-speaking support. However, the answer to it greatly grew and eventually began to live an independent life, and even got its own problems. As is clear from the title of the article, the task was devoted to calculating the weight spectrum, and therefore it directly relates to discrete mathematics and linear algebra. It also shows the solution in the programming language ...
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Personal experience of using contactless sensors in the development

Personal experience of using contactless sensors in the developmentGood day to all! My name is Maxim, I am a leading developer at Habilect. 3r3179.  
3r3179.  
3r3193.
In each programmer’s life, there comes a moment when I want to share what 2/3 of my life is spent on - a description of work and projects :)
 
3r3179.  
Historically, the development of systems based on contactless sensors has become my main field of activity. 3r3179.  
3r3179.  
For almost 7 years, many options have been tried - Microsoft Kinect (both the XBOX 360 version and Kinect One for Windows), Intel RealSense (starting with the first version on the market - F20? continuing the SR300 and...
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The concept of voice interface control of the computing system "DIVA" to help people with speech disorders

The concept of voice interface control of the computing system "DIVA" to help people with speech disorders
 
 
INTRODUCTION 3-333432.
 
 
Currently, much attention is paid to creating an accessible environment for people with disabilities and disabilities. An important means of ensuring accessibility and improving the quality of life, social interaction, integration into society for people with disabilities are computer equipment and specialized information systems. An analysis of the literature has shown that today various developments are underway to facilitate the interaction between man and computer, including the development of voice interfaces for managing a computing system. However, these developments ...
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Fast Sin and Cos on built-in ASM for Delphi

 
3r3-31. Hello!
 
 
There was a need to write a quick calculation of Sin and Cos. The basis for the calculations took the decomposition of the Taylor series. I use it in 3D systems (OpenGL and a graphical library of my own development). Unfortunately, it’s not possible to reduce the series “perfectly” for Double, but this is offset by good acceleration. The code is written in the assembler built into Delphi XE6. Used by SSE2.
 
 
Not suitable for scientific computing, but quite suitable for use in games.
 
There is enough accuracy to cover the digit capacity of the Single number, which is used
 
for m...
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The optimal location of the shards in the Elasticsearch petabyte cluster: linear programming

The optimal location of the shards in the Elasticsearch petabyte cluster: linear programming At the heart of the Meltwater and information retrieval systems. Fairhair.ai There is a collection of Elasticsearch clusters with billions of articles from the media and social media. 3r33386.  
3r33386.  
Index shards in clusters differ greatly in access structure, workload, and size, which raises some very interesting problems. 3r33386.  
3r33386.  
In this article, we will describe how linear programming (linear optimization) was applied to maximize the uniform distribution of the search and index workload across all nodes in the clusters. This solution reduces the chance that a single node will become ...
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Echoes of magic on guard of exact sciences

 
3r3-31.
Echoes of magic on guard of exact sciences 3r33434.
 
Friday night is coming, the labor wages of the next work week aggressively sneak up to their logical conclusion, which means that you can loosen up the stranglehold of official duties and indulge in a bit. And what could be more pacifying than indulging in sophistic fantasies about the laws by which this mortal world exists? Absolutely nothing
 
 
With this text, I propose to dilute the high degree of seriousness of the majority of habro-publications and, leaning back in the chair /on the way from work /study, follow the logic of one of three. crazy 3r312. interesting analogy, revealing ...
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