검색연산자 | 기능 | 검색시 예 |
---|---|---|
() | 우선순위가 가장 높은 연산자 | 예1) (나노 (기계 | machine)) |
공백 | 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 | 예1) (나노 기계) 예2) 나노 장영실 |
| | 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 | 예1) (줄기세포 | 면역) 예2) 줄기세포 | 장영실 |
! | NOT 이후에 있는 검색어가 포함된 문서는 제외 | 예1) (황금 !백금) 예2) !image |
* | 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 | 예) semi* |
"" | 따옴표 내의 구문과 완전히 일치하는 문서만 검색 | 예) "Transform and Quantization" |
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | B61B-013/08 |
미국특허분류(USC) | 104/282 ; 104/284 ; 104/1381 ; 105/365 |
출원번호 | US-0792268 (1991-11-18) |
발명자 / 주소 | |
인용정보 | 피인용 횟수 : 32 인용 특허 : 0 |
A method and apparatus is capable of high-speed transportation of passengers and/or freight. Vehicles (22) are operated along a guideway (14) as a result of the interaction between vehicle lift, steering and propulsion apparatus, each of which includes coil assemblies that are mounted on the vehicle (22), and magnet assemblies mounted on the guideway (14). Vehicle propulsion is provided by the interaction of currents on the vehicle (22) with time-varying magnetic fields that are generated along the guideway (14). The coils and magnets interact in accorda...
A transportation system comprising: a vehicle guideway including means for generating first time-varying magnetic field waves, a plurality of lift magnets, and a plurality of steering magnets, said lift magnets and said steering magnets are formed of permanent magnets for generating a uniform magnetic field; said lift magnets have a U-shape including a pair of parallel legs and a bottom perpendicular to said legs, said plurality of lift coils are positioned within said parallel legs whereby the interaction between said lift magnets and said lift coils is...