90results about How to "Improve attenuation characteristics" patented technology

The invention relates to an optical fiber large in effective area. The optical fiber large in the effective area comprises a fiber core layer and a covering layer. The optical fiber large in the effective area is characterized in that the fiber core layer comprises an inner core layer and an outer core layer, the radius r1 of the inner core layer is 1 to 4 microns, a relative refractive index difference delta 12 of the inner core layer to the outer core layer meets the condition that -0.2% <= delta 12 < 0%, the relative refractive index difference of the inner core layer to the outer core layer is invariant or gradually increased along with increasing of the radius, the radius r2 of the outer layer is 4 to 7 microns, and the relative refractive index difference delta 2 of the outer core layer is -0.15 % to 0.05 %; the covering layer comprises an inner covering layer, a sunk concave covering layer and an outer covering layer, the inner covering layer covers the fiber core layer, the radius r3 of the inner covering layer is 7 to 20 microns, the relative refractive index difference delta 3 is within the range of -0.5 % to -0.1 %, the radius r4 of the sunk concave covering layer is 12 to 40 microns, the relative refractive index difference delta 4 is within the range of -1.0 % to -0.3 %, and the relative refractive index difference delta 5 is within the range of -0.2% to -0.4%. The optical fiber large in the effective area has a large effective area, quite low transmission loss and good curve characteristics, and is particularly suitable for application of a long-distance high-speed large-volume communication system.

An actual vehicle actuator operation control input and a model operation control input are determined by an FB distribution law such that the difference between a reference state amount determined in a vehicle model and an actual state amount of an actual vehicle approximates zero, and then an actuator device of the actual vehicle and the vehicle model are operated on the basis of the control inputs. The value of a parameter of the vehicle model set according to an actual vehicle motional state such that the attenuation property of a reference state amount when a drive manipulated variable is changed is higher than the attenuation property of an actual state amount. Accordingly, the actual vehicle actuator device is properly controlled independently of an actual vehicle motional state such that a state amount related to an actual vehicle motion approximates a vehicle state amount on a dynamic characteristic model.

The invention relates to a damper device for inhibiting torsional vibration of an engine in a broad range. A damper device (11) is provided between the engine (12) and a transmission (13) and has a torque distribution mechanism (20) that is provided with a bracket C connected to the engine (12), a first gear ring (R1) connected to the engine (12) via a first elastic member (22), a sun gear S connected to the transmission (13), and a second gear ring (R2) connected to the transmission (13) via a second elastic member (24). The damper device (11) further has a first clutch (CL1) that is provided between the sun gear (S) and the transmission (13) that is switched between an engaged state of connecting the sun gear (S) and the transmission (13) and a released state of disconnecting the sun gear (S) from the transmission (13) and a second clutch (CL2) that is provided between the second gear ring (R2) and the transmission (13) and that is switched between an engaged state of connecting the second gear ring (R2) to the transmission (13) and a released state of disconnecting the second gear ring (R2) from the transmission.

A surface acoustic wave filter includes a piezoelectric substrate (110) and a plurality of one-terminal-pair surface acoustic wave resonators (111,112), which are disposed on the piezoelectric substrate in a ladder pattern and each of which includes an IDT electrode having a pair of comb electrodes. The one-terminal-pair surface acoustic wave resonators disposed in a ladder pattern include series resonators (111a-c), all of which are thinned-out. The electrode pitch of the IDT electrode of at least one (111b) of the series resonators is different from that of the IDT electrodes of the other series resonators (111a,c).

The invention discloses a novel 3D printed protective material in a high-negative-Poisson-ratio interwoven structure. The novel 3D printed protective material in the high-negative-Poisson-ratio interwoven structure is printed and formed from shape memory materials and common rubber through droplet injection additive manufacturing. The structure of the novel 3D printed protective material in the high-negative-Poisson-ratio interwoven structure is internally provided with triangular structures (1), of which nodes are connected through linear structures (3); the neighboring linear structures (3)define unclosed hexagonal structures. By means of the 3D printing technology, improved photosensitive materials can be 3D-printed by temperature stimulus into objects with excellent memory, response,resilience, anti-seismic and adaptive properties and the like.