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EHang
Guangzhou EHang Intelligent Technology Co. Ltd is a company based in Guangzhou, China that develops and manufactures autonomous aerial vehicles (AAVs) and passenger AAVs which have entered service in China for aerial cinematography, photography, emergency response, and survey missions. History EHang announced the ''Ehang 184'', introduced at the Consumer Electronics Show in January 2016, as the world's first AAV capable of carrying passengers. The company announced plans with Dubai's Road & Transportation Agency in 2017 to launch an autonomous flying-taxi service starting in the summer of 2017, but didn't succeed. The company has also worked on a project with Nevada's Institute for Autonomous Systems for an AAV taxi that can transport a single passenger for up to 23 minutes with the EHang 184. In November 2018, an agreement was signed with the city of Lyon, France, to open a research center there. At the same time, a cooperation agreement was concluded with the Austrian aer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eh? (play)
''Eh?'' is a play by Henry Livings. Production history Original Production The play premièred at the Aldwych Theatre in London's West End, produced as part of the Royal Shakespeare Companys London Season, in October 1964 and featured David Warner, Donald Sinden and Janet Suzman and was directed by Peter Hall. Subsequent productions Two years later it opened Off-Broadway at the Circle in the Square Downtown on Bleecker Street on October 16, 1966. The production was directed by Alan Arkin, using the pseudonym "Roger Short". Arkin had stepped in as director about two weeks before it opened and after two directors had quit. He used a pseudonym because he was under contract to begin direction of ''Hail, Scrawdyke!'' only a week later. The US production starred Dustin Hoffman as Valentine Brose, Alexandra Berlin as Betty Dorrick, Dana Elcar as Price, Carl Gabler as Aly, Joseph Maher as Reverend Mort and Elizabeth Wilson as Mrs. Murray. The play was the first major critical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bottomless Pit (album)
''Bottomless Pit'' is the fifth studio album by experimental hip hop group Death Grips, released on May 6, 2016, through Third Worlds and Harvest Records. Background On October 21, 2015, the group uploaded a video to their YouTube page titled ''Bottomless Pit''. It features footage from 2013 of the late American actress Karen Black reciting lines from a film script that Death Grips drummer Zach Hill wrote months before her death. They also posted on their website and Facebook page that this would be the title for their upcoming fifth official studio album. Later, on December 16, the group posted a tweet containing the phrase "it won't lit", eventually revealed to be a lyric from the ''Bottomless Pit'' track "BB Poison". On February 6, 2016, Death Grips released the song "Hot Head" from their upcoming album onto their SoundCloud and YouTube accounts. The cover art and tracklisting were then revealed on March 18, followed on April 19 by the announcement of a May 6 release date ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Nippon Network
, or A-net, was an airline based on the grounds of Tokyo International Airport in Ōta, Tokyo, Japan. It operated feeder services for parent Air Nippon, itself a subsidiary of All Nippon Airways (ANA). Its main base was New Chitose Airport. On October 1, 2010, Air Nippon Network, Air Next and Air Central were merged and rebranded as ANA Wings. History The airline was established in May 2001 to operate Air Nippon's local feeder routes from Tokyo and Sapporo. It started operations on 1 July 2002 using three Bombardier Dash 8 aircraft. In December 2003 4 more Dash 8s joined to replace Boeing 737 aircraft operated from Osaka by Air Nippon. In April 2004 Air Nippon Network was headquartered in Higashi-ku, Sapporo, Hokkaido. Air Nippon Network had 400 employees (at March 2007). Destinations Domestic destinations included: 運航路線 and 会社概要 < ...
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Hartree
The hartree (symbol: ''E''h or Ha), also known as the Hartree energy, is the unit of energy in the Hartree atomic units system, named after the British physicist Douglas Hartree. Its CODATA recommended value is = The hartree energy is approximately the electric potential energy of the hydrogen atom in its ground state and, by the virial theorem, approximately twice its ionization energy; the relationships are not exact because of the finite mass of the nucleus of the hydrogen atom and relativistic corrections. The hartree is usually used as a unit of energy in atomic physics and computational chemistry: for experimental measurements at the atomic scale, the electronvolt (eV) or the reciprocal centimetre (cm−1) are much more widely used. Other relationships :E_\mathrm = = m_\mathrm\left(\frac\right)^2 = m_\mathrm c^2 \alpha^2 = ::= 2 Ry = 2 ''R''∞''hc'' ::≜ ::≜ ::≜ ::≜ ::≜ ::≜ ::≜ ::≜ where: *''ħ'' is the reduced Planck constan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EHD (other)
EHD may refer to: * EHD protein family * Electrohydrodynamics * ''English Historical Documents '' English Historical Documents'' (''EHD'') is a series of publications of source material on English history by the academic publisher Eyre and Spottiswoode, now part of Oxford University Press. Some later volumes were published by Routledge. The ...'', a series on English history * Epizootic hemorrhagic disease * European Heritage Days {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exponential Hierarchy
In computational complexity theory, the exponential hierarchy is a hierarchy of complexity classes, which is an exponential time analogue of the polynomial hierarchy. As elsewhere in complexity theory, “exponential” is used in two different meanings (linear exponential bounds 2^ for a constant ''c'', and full exponential bounds 2^), leading to two versions of the exponential hierarchy.Anuj Dawar, Georg Gottlob, Lauri Hella, Capturing relativized complexity classes without order, Mathematical Logic Quarterly 44 (1998), no. 1, pp. 109–122. This hierarchy is sometimes also referred to as the ''weak'' exponential hierarchy, to differentiate it from the ''strong'' exponential hierarchy. EH EH is the union of the classes \Sigma^\mathsf_k for all ''k'', where \Sigma^\mathsf_k=\mathsf^ (i.e., languages computable in nondeterministic time 2^ for some constant ''c'' with a \Sigma^\mathsf_ oracle). One also defines :\Pi^\mathsf_k=\mathsf^, \Delta^\mathsf_k=\mathsf^. An equ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reduction Potential
Redox potential (also known as oxidation / reduction potential, ''ORP'', ''pe'', ''E_'', or E_) is a measure of the tendency of a chemical species to acquire electrons from or lose electrons to an electrode and thereby be reduced or oxidised respectively. Redox potential is expressed in volts (V). Each species has its own intrinsic redox potential; for example, the more positive the reduction potential (reduction potential is more often used due to general formalism in electrochemistry), the greater the species' affinity for electrons and tendency to be reduced. Measurement and interpretation In aqueous solutions, redox potential is a measure of the tendency of the solution to either gain or lose electrons when it is subjected to change by introduction of a new species. A solution with a higher (more positive) reduction potential than the new species will have a tendency to gain electrons from the new species (i.e. to be reduced by oxidizing the new species) and a solution with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Helladic
Helladic chronology is a relative dating system used in archaeology and art history. It complements the Minoan chronology scheme devised by Sir Arthur Evans for the categorisation of Bronze Age artefacts from the Minoan civilization within a historical framework. Whereas Minoan chronology is specific to Crete, the cultural and geographical scope of Helladic chronology is mainland Greece during the same timespan (c.3200–c.1050). Similarly, a Cycladic chronology system is used for artifacts found in the Aegean islands. Archaeological evidence has shown that, broadly, civilisation developed concurrently across the whole region and so the three schemes complement each other chronologically. They are grouped together as "Aegean" in terms such as Aegean art and, rather more controversially, Aegean civilization. The systems derive primarily from changes in the style of pottery, which is a benchmark for relative dating of associated artifacts such as tools and weapons. On the ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holden EH
The Holden EH is an automobile produced by General Motors-Holden in Australia from 1963 to 1965. The EH was released in August 1963 replacing the Holden EJ series, and was the first Holden to incorporate the new "Red" engine, with a seven main bearing crankshaft instead of the four main bearing crankshaft used in the "Grey" engine. At first, a larger capacity engine was only sold attached to a three-speed manual gearbox or the "Hydramatic" four-stage automatic transmission with a column shift. The Controlled Coupling Hydramatic used in the EH was actually a four-stage, although it effectively worked as a three-speed unit, except at full throttle.EH Holden Owners Manual, General Motors - Holden, 1964 (Provided with car at purchase) The engine was initially sold only with the "Hydramatic" transmission. The first EH with a 179-cubic-inch engine and a manual gear box was called the "EH-S4", and was fitted with an upgraded manual gearbox, having stronger gears than in the 149 gear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exception Handling
In computing and computer programming, exception handling is the process of responding to the occurrence of ''exceptions'' – anomalous or exceptional conditions requiring special processing – during the execution of a program. In general, an exception breaks the normal flow of execution and executes a pre-registered ''exception handler''; the details of how this is done depend on whether it is a hardware or software exception and how the software exception is implemented. Exception handling, if provided, is facilitated by specialized programming language constructs, hardware mechanisms like interrupts, or operating system (OS) inter-process communication (IPC) facilities like signals. Some exceptions, especially hardware ones, may be handled so gracefully that execution can resume where it was interrupted. Definition The definition of an exception is based on the observation that each procedure has a precondition, a set of circumstances for which it will terminate "nor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exahenry
The henry (symbol: H) is the unit of electrical inductance in the International System of Units (SI). If a current of 1 ampere flowing through a coil produces flux linkage of 1 weber turn, that coil has a self inductance of 1 henry. The unit is named after Joseph Henry (1797–1878), the American scientist who discovered electromagnetic induction independently of and at about the same time as Michael Faraday (1791–1867) in England. Definition The inductance of an electric circuit is one henry when an electric current that is changing at one ampere per second results in an electromotive force of one volt across the inductor: :\displaystyle V(t)= L \frac, where ''V''(''t'') denotes the resulting voltage across the circuit, ''I''(''t'') is the current through the circuit, and ''L'' is the inductance of the circuit. The henry is a derived unit based on four of the seven base units of the International System of Units: kilogram (kg), metre (m), second (s), and ampere (A). Expre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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