The Ackley function is widely used for testing optimization algorithms. In its two-dimensional form, as shown in the plot above, it is characterized by a nearly flat outer region, and a large hole at the centre. The function poses a risk for optimization algorithms, particularly hillclimbing algorithms, to be trapped in one of its many local minima.

Recommended variable values are: a = 20, b = 0.2 and c = 2π.

So,

AHICDM is a simple digital mode that transmits bits by varying the amount of silence between pulses. It is a narrowband mode that transmits slowly.

I only came across this modulation while looking at the Recently changed pages list of sigidwiki. It looked easy to implement, and didn’t have much written about it, so I decided to play around with the provided audio example.

I have never seen this modulation used in the wild, and the only mention I have seen of it is in the Signal Identification Wiki. This page is written by analyzing the audio recording provided on the wiki page.

A timestamp is a sequence of characters or encoded information identifying when a certain event occurred, usually giving date and time of day, sometimes accurate to a small fraction of a second.

NextCloud is awesome suite of client-server software for creating and using file hosting services. NextCloud is open-source alternative to most of Google services. Mostly, I'm using it for syncing my devices and storing media files. I have an instance of NextCloud at my server and I'm using it commonly since i left the Google.

What Google's alternatives has NextCloud.

ADS-B is the radio system used by aircraft in order to broadcast their information such as their flight number, latitude and longitude, altitude and speed.

A/B testing is a method to find out which variant of a text or graphic converts better. When you want to change an aspect of the design, rather than going in blindly or going with your gut feeling, A/B testing lets you make changes that perform better, or at the very least as well as the existing design.

Your success with A/B testing depends on a few factors