企業家伊隆·馬斯克及其所屬的SpaceX公司於2012年重新提出新構想,Hyperloop原預定在美國建造,有感於北加州高速鐵路的工程緩慢,且造價昂貴。超迴路列車白皮書(Hyperloop Alpha)初步概念設計由Tesla及SpaceX二公司的工程師共同完成,而其設計文件最初是發佈在Tesla and SpaceX公司的部落格上,並最終在2013年8月向大眾公開。此版本的Hyperloop被稱之為Hyperloop alpha,其中記載了僅供載客的版本造價為60億美元,而能同時提供載客和車輛運輸的版本造價則為75億美元,也就是指說只有高速鐵路的十分之一。多位運輸工程師在2013年對規劃中的加州路線預算提出質疑,評估建設的規模和科技的不確定風險後,質疑者認為預算總金額過低且不切實際。超迴路列車在技術和經濟上的可行性並未有前例可實證,且仍有許多爭論[5][6][7][8]。
The vactrain concept resembles a high-speed rail system without substantial air resistance by employing magnetically levitating trains in evacuated (airless) or partly evacuated tubes. However, the difficulty of maintaining a vacuum over large distances has prevented this type of system from ever being built. The hyperloop is similar to a vactrain system but operates at approximately one毫巴(100帕斯卡) of pressure.[27]
The hyperloop concept operates by sending specially designed "capsules" or "pods" through a steel tube maintained at a partial vacuum. In Musk's original concept, each capsule would float on a 0.02—0.05英寸(0.5—1.3 mm) layer of air provided under pressure to air-caster "skis", similar to how pucks are levitated above an air hockey table, while still allowing higher speeds than wheels can sustain. With rolling resistance eliminated and air resistance greatly reduced, the capsules can glide for the bulk of the journey. In the alpha design concept, an electrically driven inlet fan and axial compressor would be placed at the nose of the capsule to "actively transfer high-pressure air from the front to the rear of the vessel", resolving the problem of air pressure building in front of the vehicle, slowing it down. A fraction of the air was to be shunted to the skis for additional pressure, augmenting that gain passively from lift due to their shape.[3]
In the alpha-level concept, passenger-only pods were to be 7英尺4英寸(2.23米) in diameter and were projected to reach a top speed of 760 mph(1,220 km/h) to maintain aerodynamic efficiency.[3] (Section 4.4) The design proposed passengers experience a maximum inertial acceleration of 0.5 g, about 2 or 3 times that of a commercial airliner on takeoff and landing.[來源請求]
A number of routes have been proposed for hyperloop systems that meet the approximate distance conditions for which a hyperloop is hypothesized to provide improved transport times (distances of under approximately 1,500公里(930英里)).[28] Route proposals range from speculation described in company releases to business cases to signed agreements.
A similar problem already affects present-day air travel, where on short routes (like LAX–SFO) the flight time is only a rather small part of door to door travel time. Critics have argued that this would significantly reduce the proposed cost and/or time savings of hyperloop as compared to the California High-Speed Rail project that will serve downtown stations in both San Francisco and Los Angeles.[29][30][31] Passengers traveling from financial center to financial center are estimated to save about two hours by taking the Hyperloop instead of driving the whole distance.[32]
Others questioned the cost projections for the suggested California route. Some transportation engineers argued in 2013 that they found the alpha-level design cost estimates unrealistically low given the scale of construction and reliance on unproven technology. The technological and economic feasibility of the idea is unproven and a subject of significant debate.[5][6][7][8]
On 19 December 2018, Elon Musk unveiled a 2-英里(3 km) tunnel below Los Angeles. In the presentation, a Tesla Model X drove in a tunnel on the predefined track (rather than in a low-pressure tube). According to Musk the costs for the system are 10 million美元.[37] Musk said: "The Loop is a stepping stone toward hyperloop. The Loop is for transport within a city. Hyperloop is for transport between cities, and that would go much faster than 150 mph."[38]
The Northeast Ohio Areawide Coordinating Agency, or NOACA, partnered with Hyperloop Transportation Technologies[何时?] to conduct a $1.3 million feasibility study for developing a hyperloop corridor route from Chicago to Cleveland and Pittsburgh for America's first multistate hyperloop system in the Great Lakes Megaregion. Hundreds of thousands of dollars already have been committed to the project. NOACA's Board of Directors has awarded a $550,029 contract to Transportation Economics & Management Systems, Inc. (TEMS) for the Great Lakes Hyperloop Feasibility Study to evaluate the feasibility of an ultra-high-speed hyperloop passenger and freight transport system initially linking Cleveland and Chicago.[39][需要完整来源]
TransPod explored the possibility of hyperloop routes which would connect Toronto and Montreal,[56][57] Toronto to Windsor,[58] and Calgary to Edmonton.[59] Toronto and Montreal, the largest cities in Canada, are currently connected by Ontario Highway 401, the busiest highway in North America.[60] In March 2019, Transport Canada commissioned the study of hyperloops, so it can be "better informed on the technical, operational, economic, safety, and regulatory aspects of the hyperloop and understand its construction requirements and commercial feasibility."[61]
In 2017, SINTEF, the largest independent research organization in Scandinavia, announced they were considering building a test lab for hyperloop in Norway.[64]
An agreement was signed in June 2017 to co-develop a hyperloop line between Seoul and Busan in South Korea.[65][66]
In September 2013, Ansys Corporation ran computational fluid dynamics simulations to model the aerodynamics of the capsule and shear stress forces that the capsule would be subjected to. The simulation showed that the capsule design would need to be significantly reshaped to avoid creating supersonic airflow, and that the gap between the tube wall and capsule would need to be larger. Ansys employee Sandeep Sovani said the simulation showed that hyperloop has challenges but that he is convinced it is feasible.
[71][72]
In October 2013, the development team of the OpenMDAO software framework released an unfinished, conceptual open-source model of parts of the hyperloop's propulsion system. The team asserted that the model demonstrated the concept's feasibility, although the tube would need to be 13英尺(4米) in diameter,
[73]
significantly larger than originally projected. However, the team's model is not a true working model of the propulsion system, as it did not account for a wide range of technical factors required to physically construct a hyperloop based on Musk's concept, and in particular had no significant estimations of component weight.
[74]
In November 2013, MathWorks analyzed the proposal's suggested route and concluded that the route was mainly feasible. The analysis focused on the acceleration experienced by passengers and the necessary deviations from public roads in order to keep the accelerations reasonable; it did highlight that maintaining a trajectory along I-580 east of San Francisco at the planned speeds was not possible without significant deviation into heavily populated areas.
[75]
In January 2015, a paper based on the NASA OpenMDAO open-source model reiterated the need for a larger diameter tube and a reduced cruise speed closer to Mach 0.85. It recommended removing on-board heat exchangers based on thermal models of the interactions between the compressor cycle, tube, and ambient environment. The compression cycle would only contribute 5% of the heat added to the tube, with 95% of the heat attributed to radiation and convection into the tube. The weight and volume penalty of on-board heat exchangers would not be worth the minor benefit, and regardless the steady-state temperature in the tube would only reach 30—40 °F(17—22 °C) above ambient temperature.
[76]
According to Musk, various aspects of the hyperloop have technology applications to other Musk interests, including surface transportation on Mars and electric jet propulsion.[77][78]
Researchers associated with MIT's department of Aeronautics and Astronautics published research in June 2017 that verified the challenge of aerodynamic design near the Kantrowitz limit that had been theorized in the original SpaceX Alpha-design concept released in 2013.[79]
In 2017, Dr. Richard Geddes and others formed the Hyperloop Advanced Research Partnership to act as a clearinghouse of Hyperloop public domain reports and data.[80]
In February 2020, Hardt Hyperloop, Hyper Poland, TransPod and Zeleros formed a consortium to drive standardisation efforts, as part of a joint technical committee (JTC20) set up by European standards bodies CEN and CENELEC to develop common standards aimed at ensuring the safety and interoperability of infrastructure, rolling stock, signalling and other systems.[81]
В Википедии есть статьи о других людях с фамилией Трегубов. Павел Владимирович Трегубов Страны СССР→ Россия Франция Дата рождения 21 декабря 1971(1971-12-21) (51 год) Место рождения Краснодар, РСФСР, СССР Звание гроссмейстер (1994) международный мастер (1993) Максимальный рей...
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Lukisan ini diciptakan dengan program komputer bernama fraktal Sterling Seni komputer (Inggris: computer art) adalah jenis seni yang menggunakan komputer untuk membuat dan menampilkan suatu hasil karya seni tertentu. Jenis kesenian kontemporer ini meliputi seni yang berkaitan dengan gambar (image), suara, animasi, video, CD-ROM, DVD-ROM, video game, web site, algoritme, pertunjukan atau pameran foto (gallery). Banyak bidang disiplin ilmu yang lama sekarang telah menggunakan teknologi digital ...
KhalifahPoster filmSutradara Nurman Hakim Produser Nan Achnas Nurman Hakim Sentot Sahid Ditulis oleh Nurman Hakim Nan Achnas PemeranMarsha TimothyBen JoshuaIndra HerlambangJajang C. NoerTiti SjumanYoga PratamaDion WiyokoBrohismanPerusahaanproduksiTriximagesFrame Ritz PicturesTanggal rilis 6 Januari 2011 (2011-01-06) Durasi... menitNegara Indonesia Bahasa Indonesia Situs webhttp://khalifahfilm.com Khalifah adalah film drama Indonesia yang dirilis pada 6 Januari 2011 dengan disutradarai ol...
American composer (1926–2019) Not to be confused with Ben Jonson, Ben Johnson, or Ban Johnson. Benjamin Burwell Johnston Jr. (March 15, 1926 – July 21, 2019) was an American contemporary music composer, known for his use of just intonation. He was called one of the foremost composers of microtonal music by Philip Bush[1] and one of the best non-famous composers this country has to offer by John Rockwell.[2] Biography Johnston was born in Macon, Georgia, and taught composit...
Nota: Para outros significados, veja Los Angeles (desambiguação). Este artigo cita fontes, mas que não cobrem todo o conteúdo. Ajude a inserir referências. Conteúdo não verificável pode ser removido.—Encontre fontes: ABW • CAPES • Google (N • L • A) (Novembro de 2019) Coordenadas: 34° 3' 14 N 118° 14' 42 O Los Angeles Cidade da Califórnia Panorama urbano do Centro d...
The 100 Most Prominent Serbs First editionAuthorGroup of authorsCountryYugoslavia, modern-day SerbiaLanguageSerbianGenreBiographyPublisherPrincip, Š-JupublikPublication date1993Pages835[1] The 100 most prominent Serbs (Serbian Cyrillic: 100 најзнаменитијих Срба) is a book containing the biographies of the hundred most important Serbs[2] compiled by a committee of academicians at the Serbian Academy of Sciences and Arts. The committee members were Sava Vukov...
Representation of a thing or abstraction as a person This article is about the representation of a thing or abstraction as a person. For the attribution of human traits, emotions, or intentions to non-human entities, see Anthropomorphism. Set of porcelain figures of personifications of the four continents, German, c. 1775, from left: Asia, Europe, Africa, and America. Of these, Africa has retained her classical attributes. Formerly James Hazen Hyde collection. Personification is the rep...
United States historic placeChester Village CemeteryU.S. National Register of Historic Places Show map of New HampshireShow map of the United StatesLocationNH 102 and NH 121, Chester, New HampshireCoordinates42°57′27″N 71°15′22″W / 42.95750°N 71.25611°W / 42.95750; -71.25611Area2.5 acres (1.0 ha)NRHP reference No.79000203[1]Added to NRHPNovember 29, 1979 Chester Village Cemetery is a historic cemetery at the junction of New Hampshire ...
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El escudo de la Provincia de Granada trae, en un campo de plata, una granada de gules (rojo), rajada del mismo esmalte (color), tallada y hojada de dos hojas de sinople o verde. Bordura de cuatro compones: cuatro de gules, con un castillo de oro almenado de tres almenas, mazonado de sable (negro) y aclarado de gules, alternados con cuatro de argén, con un león rampante, de gules, linguado del mismo esmalte, uñado de argén y coronado de oro. Dos de los leones aparecen contornados (miran a ...
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White Zombie discographyFrontman Rob ZombieStudio albums4Compilation albums2Video albums4Music videos9EPs4Singles12Soundtrack albums9Tribute albums1Remix albums1 The discography for the American heavy metal band White Zombie. Albums Studio albums List of studio albums, with selected chart positions and certifications Title Album details Peak chart positions Certifications US[1] AUS[2] AUT[3] BEL (FL)[4] CHE[5] GER[6] NZ[7] SWE[8]...
1964 filmIl GauchoDirected byDino RisiWritten byRuggero MaccariEttore ScolaTullio Pinelli Dino RisiProduced byMario Cecchi GoriStarringVittorio GassmanCinematographyAlfio ContiniMusic byChico NovarroArmando TrovajoliRelease date1964Running time116 minutesLanguageItalian Il Gaucho (internationally released as The Gaucho) is a 1964 Italian comedy film directed by Dino Risi.[1] It was co-produced by Clemente Lococo, an Argentinian production company, and in Argentina it was released as U...
For the British comedy-drama film, see Limbo (2020 film). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Limbo 2021 film – news · newspapers · books · scholar · JSTOR (November 2017) (Learn how and when to remove this template message) 2021 filmLimboOfficial film posterChinese nameTraditional Chin...
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: 50 Cent videography – news · newspapers · books · scholar · JSTOR (September 2015) (Learn how and when to remove this template message) 50 Cent video discography50 Cent in 2009Music videos89Television31Video games3Films29 American rapper 50 Cent has been featur...
Cette ancienne basilique n’est pas la seule basilique Saint-Vincent. Basilique Saint-VincentCouvent des Jacobins La basilique Saint-Vincent (Sceau de Castres, 1303) Présentation Culte Catholique Dédicataire Vincent de Saragosse (Saint-Vincent) Type BasiliqueÉglise Rattachement Diocèse d'Albi (884 - 1217)Diocèse de Castres (1317 - 1801)Archidiocèse d'Albi (1801 - 1830) Début de la construction 884 Fin des travaux Reconstruite 1226, 1598, 1665 Date de démolition 1830 Géographie Pays ...