- problem space hypothesis
- 问题空间假设
Medical Chinese dictionary (湘雅医学词典). 2013.
Medical Chinese dictionary (湘雅医学词典). 2013.
Space debris — populations seen from outside geosynchronous orbit (GEO). Note the two primary debris fields, the ring of objects in GEO, and the cloud of objects in low earth orbit (LEO) … Wikipedia
Space — • The idea of space is one of the most important in the philosophy of the material world; for centuries it has preoccupied and puzzled philosophers and psychologists Catholic Encyclopedia. Kevin Knight. 2006. Space Space … Catholic encyclopedia
Riemann hypothesis — The real part (red) and imaginary part (blue) of the Riemann zeta function along the critical line Re(s) = 1/2. The first non trivial zeros can be seen at Im(s) = ±14.135, ±21.022 and ±25.011 … Wikipedia
Extraterrestrial hypothesis — [ 200px|thumb|Right|Amateur photographs from Sheffield, England, 4 March 1962 Minneapolis, Minnesota, 20 October 1960. Taken from a 1997 CIA training manual. [Haines, Gerald K, [https://www.cia.gov/csi/studies/97unclass/ufo.html A Die Hard Issue … Wikipedia
Rare Earth hypothesis — In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the emergence of complex multicellular life (metazoa) on Earth required an improbable combination of astrophysical and geological events and circumstances. The term… … Wikipedia
Kepler problem in general relativity — The Kepler problem in general relativity involves solving for the motion of two spherical bodies interacting with one another by gravitation, as described by the theory of general relativity.Typically, and in this article, one body is assumed to… … Wikipedia
Nebular hypothesis — Star formation Interstellar medium Molecular cloud … Wikipedia
Galton's problem — Galton’s problem, named after Sir Francis Galton, is the problem of drawing inferences from cross cultural data, due to the statistical phenomenon now called autocorrelation. The problem is now recognized as a general one that applies to all… … Wikipedia
RNA world hypothesis — A comparison of RNA (left) with DNA (right), showing the helices and nucleobases each employs. The RNA world hypothesis proposes that life based on ribonucleic acid (RNA) pre dates the current world of life based on deoxyribonucleic acid (DNA),… … Wikipedia
Hilbert space — For the Hilbert space filling curve, see Hilbert curve. Hilbert spaces can be used to study the harmonics of vibrating strings. The mathematical concept of a Hilbert space, named after David Hilbert, generalizes the notion of Euclidean space. It… … Wikipedia
Interdimensional hypothesis — The interdimensional hypothesis of unidentified flying objects (UFOs) and related events, advanced by astrophysicist Jacques Vallee, holds that these phenomena are visitations from other universes (or dimensions) that coexist separately alongside … Wikipedia