111 results about "Mixed beam" patented technology

A radiation therapy method that includes directing a beam along a beam path toward a treatment area. Performing a correction process on the beam, the process includes selectively collimating the beam based on a dose that takes into account bremsstrahlung interactions caused by the beam.

The invention relates to a bridge girder erection machine capable of passing through a tunnel and realizing girder erection and a bridging process thereof. The bridge girder erection machine comprises a mainframe and a lower guide beam, the mainframe comprises a main beam, and also comprises a rear ground jack, a rear guide beam overhead travelling crane, a rear crane trolley, a front crane trolley, a front ground jack, an auxiliary travelling ground jack and a front guide beam overhead travelling crane which are arranged successively from the rear end to the front end of the main beam; a track is arranged on the main beam, and the front crane trolley, the rear crane trolley, the front guide beam overhead travelling crane and the rear guide beam overhead travelling crane run on the track; the lower guide beam comprises a main beam of the lower guide beam, a rear ground jack arranged behind the lower part of the main beam, and a front ground jack arranged in front of the lower part of the main beam; the bridge girder erection machine and the bridging process can realize bridge girder erection and beam erection operations in mountain areas; a mode of mixed beam taking by the crane trolleys of the bridge girder erection machine, a beam transporting vehicle and a pack trolley can realize beam erection at a tunnel portal; and when passing a tunnel, a plurality of components can be retracted and folded to enable the bridge girder erection machine to pass through the channel conveniently without being limited by the diameter of the tunnel, and the bridging construction efficiency is high and the bridging operation is stable.

The invention discloses a self-anchored suspension bridge with single-tower, comprising a cable tower and main cable, main beam and suspender. The middle part of main cable is supported by the top of cable tower and two ends of main cable are fixed on the main beam. The main beam is hung under the main cable by the suspender. The main beam is mixed beam and the main suspending part is steel stiffing beam. Side-suspending part and anchor-suspending part at two sides of main suspending part are concrete stiffening beams. The steel stiffening beam and the concrete stiffening beam are connected by steel-concrete joint part. Concrete stiffening beam at the steel-concrete joint part is covered by bearing steel plate and the bearing steel plated is fixed with the steel stiffening beam at the steel-concrete joint part. The invention is provided with simple structure, larger suspending ability, considerable economic benefit and durability. When it is built there is no influence to navigation.

The invention discloses an optical fiber Raman spectrum gas analysis device, which belongs to the technical field of gas analysis, and comprises a laser, a light beam coupling device, a gas sample chamber, a collimation beam splitting device and a photoelectric imaging receiving device, wherein the light beam coupling device couples the laser into the gas sample chamber; the laser reacts with gasto be detected in the fiber core of the hollow-core optical fiber to generate Raman scattering; the collimation beam splitting device collimates the mixed light beams and then separates out laser, andtransmits the light beams only containing scattering signals to the photoelectric imaging receiving device; and the photoelectric imaging receiving device performs digital spatial filtering on the forward scattering signal to obtain a Raman spectrum of the to-be-detected gas. To-be-detected gas reacts with laser in the hollow-core optical fiber to generate an enhanced Raman scattering signal, thephotoelectric imaging receiving device is used for collecting forward signals and implementing digital spatial filtering, so that background signals of the gas sample chamber are reduced, the problemthat trace components are difficult to detect in Raman gas analysis is solved, and the detection sensitivity of the system is improved.

The invention relates to a road-rail co-layer mixed-beam suspension cable-stayed cooperation bridge. The bridge comprises a main beam and at least two bridge towers, wherein the two bridge towers aresequentially arranged along the bridge direction, a road bridge deck and an rail bridge deck are arranged on the main beam in the same layer, the two adjacent bridge towers are connected through a main cable, and the main cable is connected with main beam bodies below through a sling; and each bridge tower is connected with main beam bodies on the two sides through an stay cable. According to theroad-rail co-layer mixed-beam suspension cable-stayed cooperation bridge, a suspension structure of the main cable plus the sling and a cable-stay structure of the stay cable are combined, the advantages of a suspension bridge and a cable-stayed bridge are brought into full play, thus effective improving the rigidity of 1 / 4 of the span and span area structure; in addition, the main beam is large in overall rigidity and reasonable in stress, so that the span of a bridge can be improved to 1600 m, the overall rigidity of the structure is large, and accordingly requirements of railway track shapedeformation can be fully met.