|
Descent
Descent may refer to: As a noun Genealogy and inheritance * Common descent, concept in evolutionary biology * Kinship, one of the major concepts of cultural anthropology **Pedigree chart or family tree **Ancestry **Lineal descendant **Heritage **Royal descent - lineal descent from a monarch *Phylogenetics ** Tree diagram (other) *Inheritance (law and property) Mathematics * Infinite descent, a method going back to Fermat to solve Diophantine equations * Descent (mathematics), an idea extending the notion of "gluing" in topology * Hadamard's method of descent, a technique for solving partial differential equations * Gradient descent, a first-order optimization algorithm going back to Newton * Descents in permutations, a classical permutation statistic in combinatorics Other uses * Descent (aeronautics), the decrease of an aircraft in altitude during flight * Descent (font), the distance that a typeface descends below the baseline in typography *Katabasis As a proper na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gradient Descent
Gradient descent is a method for unconstrained mathematical optimization. It is a first-order iterative algorithm for minimizing a differentiable multivariate function. The idea is to take repeated steps in the opposite direction of the gradient (or approximate gradient) of the function at the current point, because this is the direction of steepest descent. Conversely, stepping in the direction of the gradient will lead to a trajectory that maximizes that function; the procedure is then known as ''gradient ascent''. It is particularly useful in machine learning for minimizing the cost or loss function. Gradient descent should not be confused with local search algorithms, although both are iterative methods for optimization. Gradient descent is generally attributed to Augustin-Louis Cauchy, who first suggested it in 1847. Jacques Hadamard independently proposed a similar method in 1907. Its convergence properties for non-linear optimization problems were first studied by Has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Descent 3
''Descent 3'' (stylized as ''Descent³'') is a first-person shooter video game developed by Outrage Entertainment and published by Interplay Entertainment. It was originally released for Microsoft Windows in North America on June 17, 1999. ''Descent 3'' is the third game in the ''Descent'' video game series and a sequel to '' Descent II''. The game takes place in a science fiction setting of the Solar System where the player is cast as Material Defender, a mercenary who must help an organization known as the Red Acropolis Research Team to stop robots infected by an alien virus. Unlike in standard first-person shooters, the player must control a flying ship that has a six degrees of freedom movement scheme, allowing the player to move and rotate in any 3D direction. In addition to a single-player campaign mode, ''Descent 3'' features an online multiplayer mode where numerous players can compete against each other in eight different game types. The game features both indoor and o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinship
In anthropology, kinship is the web of social relationships that form an important part of the lives of all humans in all societies, although its exact meanings even within this discipline are often debated. Anthropologist Robin Fox says that the study of kinship is the study of what Human, humans do with these basic facts of lifemating, gestation, Parenting, parenthood, socialization, siblingship etc. Human society is unique, he argues, in that we are "working with the same raw material as exists in the animal world, but [we] can conceptualize and categorize it to serve social ends." These social ends include the socialization of children and the formation of basic economic, political and religious groups. Kinship can refer both to the patterns of social relationships themselves, or it can refer to the study of the patterns of social relationships in one or more human cultures (i.e. kinship studies). Over its history, anthropology has developed a number of related concepts an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Descent (video Game)
''Descent'' is a first-person shooter (FPS) game developed by Parallax Software and released by Interplay Productions in 1995 for MS-DOS, and later for Macintosh, PlayStation, and RISC OS. It popularized a subgenre of FPS games employing six degrees of freedom and was the first FPS to feature entirely true-3D graphics. The player is cast as a mercenary hired to eliminate the threat of a mysterious extraterrestrial computer virus infecting off-world mining robots. In a series of mines throughout the Solar System, the protagonist pilots a spaceship and must locate and destroy the mine's power reactor and escape before being caught in the mine's self-destruction, defeating opposing robots along the way. Players can play online and compete in either deathmatches or cooperate to take on the robots. ''Descent'' was a commercial success. Together with its sequel, it sold over 1.1 million units as of 1998 and was critically acclaimed. Commentators and reviewers compared it to '' Doom' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Descent
A royal descent is a genealogical line of descent from a past or present monarch. Both geneticists and genealogists have attempted to estimate the percentage of living people with royal descent. From a genetic perspective, the number of unprovable descendants must be virtually unlimited if going back enough generations, according to coalescent theory, as the possibility increases exponentially following every century back in time. In other words, the number of descendants from a monarch increases as a function of the length of time between the monarch's death and the birth of the particular descendant. As for descendants of genealogically documented royal descent, various estimated figures have been proposed. For instance, Mark Humphrys, a professor of computer science at Dublin City University in Ireland, and genealogy enthusiast, estimated that there are millions of people of provable genealogical ancestry from medieval monarchs. In genealogy, royal descent is sometimes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Descent II
''Descent II'' is a 1996 first-person shooter game developed by Parallax Software and first published for DOS by Interplay Productions. A version for the PlayStation (console), PlayStation was released under the title ''Descent Maximum''. It is the second installment in the ''Descent'' video game series and the sequel to ''Descent (video game), Descent''. The player controls a spaceship from the pilot's perspective and must navigate extrasolar underground mines to locate and destroy their reactors and escape being caught in their self-destructions, while engaging and surviving infected robots, which will attempt to destroy the ship. Unlike other first-person shooters, its six degrees of freedom, six-degrees-of-freedom scheme allows the player to move and rotate in any three-dimensional space and direction. ''Descent II'' started as a project intended to expand the original using a compact disc's storage, and later became a standalone product. The game received very positive rev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
