Euclidean space This article is about Euclidean spaces of all dimensions. For 3-dimensional Euclidean space, see 3-dimensional space. A sphere, the most perfect spatial shape according to Pythagoreans, also is an important concept in modern understanding of Euclidean spaces Every point in three-dimensional Euclidean space is determined by three coordinates. How the Stock Market and Economy Really Work - Kel Kelly "A growing economy consists of prices falling, not rising." The stock market does not work the way most people think. A commonly held belief — on Main Street as well as on Wall Street — is that a stock-market boom is the reflection of a progressing economy: as the economy improves, companies make more money, and their stock value rises in accordance with the increase in their intrinsic value. A major assumption underlying this belief is that consumer confidence and consequent consumer spending are drivers of economic growth.
Hilbert space The state of a vibrating string can be modeled as a point in a Hilbert space. The decomposition of a vibrating string into its vibrations in distinct overtones is given by the projection of the point onto the coordinate axes in the space. Hilbert spaces arise naturally and frequently in mathematics and physics, typically as infinite-dimensional function spaces. The earliest Hilbert spaces were studied from this point of view in the first decade of the 20th century by David Hilbert, Erhard Schmidt, and Frigyes Riesz.
How a blind girl sees the world. (Animation) é€™æ˜¯ç”±å°ç£è—è¡“å¤§å¸ å¤šåª’é«”å‹•ç•«è—è¡“å¸ç³» 95ç´šçš„ä¸‰ä½ç•¢æ¥ç”Ÿæ‰€è£½ä½œçš„ç•¢æ¥çŸç‰‡æ•…äº‹æ˜¯æ•˜è¿°ä¸€ä½å°å¥³å©å› ç‚ºè¢«æ¶åŠ«è€Œé›¢é–‹åŽŸæœ¬ç†Ÿæ‚‰çš„é“è·¯ï¼Œåœ¨ç©¿éŽç±¬ç¬†å¾Œçš„æœªçŸ¥ä¸–ç•Œï¼Œé è‘—è¦–è¦ºä»¥å¤–çš„æ„Ÿå®˜å±•é–‹ä¸€å ´å¤§å†’éšªã€‚å…¨ç‰‡æŽ¡å–æ°´å½©ç¹ªè£½çš„èƒŒæ™¯èˆ‡æ‰‹ç¹ªå‹•ç•«æé…çš„è£½ä½œæ–¹å¼ï¼Œä»¥ç¹ªæœ¬å¼çš„ç”¨è‰²å’Œç°¡å–®çš„äººç‰©é€ åž‹å‘ˆç¾å°å¥³å©æƒ³åƒä¸çš„ä¸–ç•Œã€‚This is a graduation Production made by three students graduated from the National Taiwan University of Arts. The main character of little girl in the story confronts a robbery and strays from the road she is familiar with. After passing a hedge, she enters an unknown world and unfolds a magical adventure depending on senses other than vision and her imagination. With soft and cute colors as the main key, we used simple designs to depict the little girls' imaginary world.å®˜æ–¹ç¶²é Official website: Tags
Octave Executable versions of GNU Octave for GNU/Linux systems are provided by the individual distributions. Distributions known to package Octave include Debian, Ubuntu, Fedora, Gentoo, and openSUSE. These packages are created by volunteers. The delay between an Octave source release and the availability of a package for a particular GNU/Linux distribution varies. The Octave Wiki has instructions for installing Octave on OS X systems.
Ten games that make you think about life At the start of this year, we decided to come up with a list of Flash casual games with a philosophical bent. To be honest, we struggled. After days of research, we could only find a handful of games that had the thought-provoking depth we were looking for. Our list (which you can view by clicking here) was therefore only five games long. Fast forward to now, and it is remarkable how much difference a few months can make. Thanks to the work of pioneers like Daniel Benmergui, Gregory Weir and PixelAnte, there is now an abundance of clever arty Flash games to pique our intellects, and as a result creating this follow-up list of games that make you think has been a doddle. Big O notation Example of Big O notation: f(x) ∈ O(g(x)) as there exists c > 0 (e.g., c = 1) and x0 (e.g., x0 = 5) such that f(x) < cg(x) whenever x > x0. Big O notation characterizes functions according to their growth rates: different functions with the same growth rate may be represented using the same O notation. The letter O is used because the growth rate of a function is also referred to as order of the function. A description of a function in terms of big O notation usually only provides an upper bound on the growth rate of the function. Associated with big O notation are several related notations, using the symbols o, Ω, ω, and Θ, to describe other kinds of bounds on asymptotic growth rates.
Machine Learning Machine learning is the science of getting computers to act without being explicitly programmed. In the past decade, machine learning has given us self-driving cars, practical speech recognition, effective web search, and a vastly improved understanding of the human genome. Machine learning is so pervasive today that you probably use it dozens of times a day without knowing it. Many researchers also think it is the best way to make progress towards human-level AI. In this class, you will learn about the most effective machine learning techniques, and gain practice implementing them and getting them to work for yourself. More importantly, you'll learn about not only the theoretical underpinnings of learning, but also gain the practical know-how needed to quickly and powerfully apply these techniques to new problems.
12 IT skills that employers can't say no to Have you spoken with a high-tech recruiter or professor of computer science lately? According to observers across the country, the technology skills shortage that pundits were talking about a year ago is real (see "Workforce crisis: Preparing for the coming IT crunch"). "Everything I see in Silicon Valley is completely contrary to the assumption that programmers are a dying breed and being offshored," says Kevin Scott, senior engineering manager at Google Inc. and a founding member of the professions and education boards at the Association for Computing Machinery. "From big companies to start-ups, companies are hiring as aggressively as possible." Also check out our updated 8 Hottest Skills for '08.
Alison Gopnik Alison Gopnik takes us into the fascinating minds of babies and children, and shows us how much we understand before we even realize we do. Why you should listen What’s it really like to see through the eyes of a child? Are babies and young children just empty, irrational vessels to be formed into little adults, until they become the perfect images of ourselves? Frequentism and Bayesianism IV: How to be a Bayesian in Python This post is part of a 4-part series: Part I Part II Part III Part IV See also Frequentism and Bayesianism: A Python-driven Primer, a peer-reviewed article partially based on this content. I've been spending a lot of time recently writing about frequentism and Bayesianism. Here I want to back away from the philosophical debate and go back to more practical issues: in particular, demonstrating how you can apply these Bayesian ideas in Python. The workhorse of modern Bayesianism is the Markov Chain Monte Carlo (MCMC), a class of algorithms used to efficiently sample posterior distributions.
Round-up of Web Browser Internals Resources - HTML5Rocks Updates In many cases, we treat web browsers as a black box. But as we gain a better understanding of how they work, we not only recognize where to make smart optimizations but also we push them farther. The links below capture most of the resources that explain the innerworkings of web browsers. Getting Started - Git « Some thoughts, ideas and fun!!! Overview In this article I’ll be covering some the things you may need to know about Git. I’ll try and go into the concepts that Git puts out there as well as how to start using it successfully. This article will be written in such a way that it flows into my next article which will cover Git-Flow for branching strategies.