3145results about How to "Achieve lightweight" patented technology

The invention discloses a direct type backlight module and its application, which at least comprises a back frame module and a light source, and the light source is arranged at the back frame module. The back frame module comprises multiple brackets which are assembled to a framework. The direct type backlight module can be applied in liquid crystal display devices.

The invention relates to a reflecting backboard which is suitable for a backlight module with a light source group. The reflecting backboard comprises a frame and a reflecting piece, wherein the frame is provided with at least one hollow opening; the reflecting piece is assembled in the frame; the reflecting piece is provided with a reflecting layer and a radiating layer which are made of different materials; the reflecting layer is provided with a reflecting face and a back face opposite to the reflecting face; the reflecting face defines a concave part which is used for containing the light source group; and the radiating layer is arranged on the back face of the reflecting layer.

The invention belongs to the technical field of steel rolling, and particularly relates to high-flexural-behavior hot-formed steel used for automobiles and a manufacturing method thereof. The steel comprises following trace elements by mass: 0.18-0.3% of C, not more than 0.3% of Si, 1-1.6% of Mn, not more than 0.015% of P, not more than 0.002% of S, 0.1-0.3% of Cr, 0.02-0.06% of Ti, 0.02-0.06% of Al, 0.0005-0.004% of B, not more than 0.004% of [N] and not more than 0.003% of [O]. The manufacturing method includes: heating a casting blank at a low temperature, performing controlled rolling in two stages, rapidly cooling, reeling up at a low temperature, preparing a steel coil by cold rolling and low-temperature critical annealing, shearing to prepare component tablets and performing hot press molding. By the manufacturing method, steel crystal grains are refined and ductility and toughness of the steel are enhanced, so that more energy is absorbed during deformation of the steel and automobile safety performance is enhanced.

Provided is a vehicle body bottom structure whereby collision load absorption performance during a narrow offset crash can be improved and retraction of the A-pillar can be minimized. A vehicle body bottom structure comprising a dashboard lower (62) for partitioning a vehicle interior (R) and a power installation interior (MR) and also for partitioning the vehicle interior (R) and a wheel house (WH), an A-pillar (7) erected at the vehicle-widthwise end of the dashboard lower (62), and a gusset (30) spanning between the dashboard lower (62) and the A-pillar (7); the gusset (30) being designed such that one end side is bonded to the dashboard lower (62) and grows farther from the dashboard lower (62) the nearer to the A-pillar (7), the other end side is bonded to the A-pillar (7), and a collapse space (S) having a substantially triangular shape in a plan view is formed in the portion enclosed by the dashboard lower (62), the A-pillar (7), and the gusset (30).

The present invention pertains to a process for manufacturing a hot-rolled steel sheet which comprises: heating a steel raw material that contains, in mass%, 0.055 to 0.15% of C, at most 0.2% of Si, at most 1.3% of Mn, at most 0.03% of P, at most 0.007% of S, at most 0.1% of Al, at most 0.01% of N and 0.14 to 0.30% of Ti so as to satisfy the relationship 1.0 <= ([C]/12)/([Ti*]/48) (wherein [Ti*] = [Ti]-3.4[N]-1.5[S]) to a temperature (T) ( DEG C) which is equal to or higher than 1150 DEG C and which satisfies the relationship [Ti*] < 10{-7000/(T+273)+2.75/[C]; keeping the steel raw material in a temperature range down to 1150 DEG C for at least 15 minutes; subjecting the resulting steel raw material to hot rolling wherein the total rolling reduction in a temperature range up to 980 DEG C is 40% or less and the finish rolling temperature is 880 DEG C or higher; cooling the hot-rolled steel sheet at a cooling rate of 40 to 200 DEG C/s within three seconds after the completion of the finish rolling; and winding up the cooled steel sheet in a temperature range of 500 to 680 DEG C.

A light guide plate, comprising a light exiting surface and a light entering end, has a shape in which its thickness perpendicular to the light exiting surface increases gradually as it is away from the light entering end and has scattering particles scattered therein. A light guide plate assembly comprises this guide plate, and a prism sheet in which a plurality of prisms are arranged in parallel with the apex angles of the prisms arranged facing the light exiting surface. A surface illuminating device comprises a light guide plate or a light guide plate assembly, and a liquid crystal display device comprises the surface illuminating device. The scattering particles scatter light entering at the light entering end and propagating through the inside and satisfy the following expression (1) and (2), and the apex angles of the prisms of the prism sheet satisfy the following expressions (3) and (4). (F is scattered sectional area, NP is particle density, LG is length of guide plate along incident direction, KC is correction coefficient, phi is apex angle of symmetric prism, and theta1 and theta2 are two apex angles divided by perpendicular of non-symmetric prism.) 1.1<=FNPLGKC<=8.2 ---(1) 0.005<=KC<=0.1 ---(2) 55 DEG<=theta<=80 DEG ---(3) 0 DEG<= theta1<= 15 DEG and 30 DEG<= theta2<= 45 DEG ---(4).

The invention discloses a feature pyramid-based remote-sensing image time-sensitive target recognition system and method. The system comprises a target feature extraction sub-network, a feature layersub-network, a candidate area generation sub-network and a classification and regression sub-network, wherein the target feature extraction sub-network is used for carrying out multiple layers of convolution processing on a to-be-processed image and outputting the convolution processing result of each layer as a feature layer; the feature layer sub-network is used for overlapped the last feature layer and the current feature layer to obtain the current fused feature layer, wherein the topmost fused feature layer is a topmost feature layer; the candidate area generation sub-network is used forextracting candidate areas from different layers of fused feature layers; and the classification and regression sub-network is used for mapping the candidate areas to different layers of fused featurelayers so as to obtain a plurality of mapped fused feature layers, and carrying out target judgement on the plurality of mapped fused feature layers so as to output a result. According to the systemand method, the hierarchical structures of feature pyramids are utilized to ensure that all the scales of features have rich semantic information.

The invention discloses a low-pressure casting die of an aluminium alloy wheel and a casting method thereof. The low-pressure casting die comprises a top die (1), a bottom die (2) and a side die (3), wherein a plurality of gates (4) are arranged on the bottom die (2); the center of the top die is provided with a central riser (6) which is used for feeding; the center of the bottom die is provided with a shunt cone (7) which is used for forming the center of a wheel disc, and the gates are arranged at the outer side of the lower wheel lip of the bottom die or at the window of the bottom die. The casting method comprises the following steps of mold filling, exhausting, pressurization, cooling, feeding, aluminium liquid reflux and the like. By using the invention, the quality of casting parts is increased, the mechanical property index of produced vehicle wheel spokes and wheel centers is good, and pinholes do not easily appear on products. The invention can be suitable for occasions with high requirements for product quality, is beneficial to achieving the light weight of the products, improves production efficiency, and reduces die erosion.

The invention relates to a rotor of a high-quality and high-speed built-in permanent magnet motor and a magnetic steel structural parameter determining method thereof. In the invention, the whole section magnetic steel of each electrode of the rotor of a conventional built-in permanent magnet motor is divided into multiple sections of magnetic steel which have the same polarity and different widths; the multiple sections of the magnetic steel are respectively arranged in a rotor core; and reinforcing ribs with the function of magnetic isolation are arranged among the multiple sections of the magnetic steel. By reasonably modulating and determining the width and distribution of each section of the magnetic steel, the air gap magnetic density waveform approaches sine distribution; harmonic components are reduced to the greatest extent; the eddy current loss of the magnetic steel and the torque pulsation of the motor are simultaneously reduced; and the electromagnetic performance of the motor is enhanced. Furthermore, the multiple sections of the magnetic steel are arranged in the circumference along the rotor; the highest rotating speed of the safe operation of the rotor is greatly enhanced on machinery; the radial thickness which is needed by the magnetic circuit of the rotor is obviously reduced on the structure; the rotational inertia and weight of the rotor are reduced; the dynamic response of the motor is improved; and the requirements of a high-speed driving system on the performance of the motor are met.

The invention discloses an automobile energy absorption box based on negative poisson ratio structure filling and a multi-object optimization method thereof. An energy absorption box body (2) is filled with negative poisson ratio filling inner cores (3) with an inner sunken hexagonal negative poisson ratio structure, wherein deformation induction grooves are designed on the energy absorption box body (2). The energy absorption box body is connected between front protection transverse beams and front longitudinal beams. Through mechanical properties uniquely owned by the negative poisson ratio structure, a stress deformation state during automobile collision is improved, and the energy absorption effect is reinforced, so that safety of passengers is improved, and maintenance cost is reduced. Meanwhile, the invention provides a multi-object optimization scheme aiming at the novel structure; through parametric modeling of the energy absorption inner cores, an energy absorption outer shell and a surrounding structure, on the basis of the Hamersley experimental design, the structure is subjected to crash simulation, a model approximating a response surface is obtained, and finally optimal design parameter combination is obtained on the basis of multi-object optimization of imperial competition algorithm; and the process can be applied to the development process of actual industrial production, reliability is improved, and the development time is reduced.

The invention discloses a making method of proton exchange film fuel battery pile in the fuel battery technical domain, which comprises the following steps: (1) pressing plane MEA into wave shape under heating condition; (2) adopting micro-fine pushing technique to punch the hyperthin plane metal plate; punching the plate with hole into wave shape to mate wave-shaped MEA; obtaining monopole board; (3) adopting laser welding technique to weld a couple of monopole board into double-pole board; (4) plating a layer of conductive polyaniline on the metal surface through circulating volt-ampere method. The invention improves the reacting efficiency and energy density, which lightens the weight and resists corrosion.

The invention discloses an aluminum body lightweight design method based on sensitivity and CAE analysis. The method comprises the following steps of 1, building an aluminum body finite element model; 2, analyzing modality and rigidity of an aluminum body; 3, building a sensitivity analysis optimization response model; 4, calculating a rigidity sensitivity coefficient, a modality sensitivity coefficient and a weight sensitivity coefficient of all components of the aluminum body; 5, according to a calculation result of the sensitivity coefficient, performing structural optimal design; 6, performing CAE analysis validation on the optimized aluminum body structure, judging whether the lightweight design objective is met or not; if yes, completing designing; if not, executing the step 5 again till the lightweight design objective is met. All structures capable of achieving the lightweight objective in the whole aluminum body structure can be analyzed, it can be efficiently verified that the optimized structure meets the requirement for modality and rigidity or not, and the efficient and reliable aluminum body lightweight design is achieved.

The invention relates to an extended range electromobile power system using a dual-clutch two-speed transmission. The extended range electromobile power system is characterized in that a crank shaft of an internal combustion engine is connected with a shell of a first dual-clutch transmission gear; a first clutch of the first dual-clutch transmission gear is connected with a shell of a second dual-clutch transmission gear through a transmission shaft; the second clutch of the first dual-clutch transmission gear is connected with a first motor rotor; a second motor rotor is connected with a shell of the second dual-clutch transmission gear through a transmission shaft; and two sets of change gears are respectively controlled to output power by controlling the disengagement or engagement of two clutches of the second dual-clutch transmission gear to realize two gears. The vehicle is mainly driven by a second motor during low-speed driving, the low-speed and low-load operation of an engine is avoided, and the economical efficiency and emission of the whole vehicle are improved; during high-speed driving, the power system operates in parallel to drive the vehicle, the energy transmission efficiency is high, and the driving range of the vehicle is further extended on the basis of ensuring the dynamic property of the whole vehicle.

A device isolation method of container-based virtual desktop comprises the following steps: identifying at least one resource attribute of capability for a hardware resource newly added to a server; associating the hardware resources with one of a plurality of hardware resource pools using the identified resource attributes such that each hardware resource in the hardware resource pool is associated with one of a plurality of resource attributes; assigning a uniquely identified ID to each hardware resource in a plurality of hardware resource pools; through the container engine, the hardware resources in the hardware resource pool are allocated to the corresponding containers according to the ID of each hardware resource, and the hardware resources are recovered from the corresponding containers into the hardware resource pool. A corresponding device isolation device for a container-based virtual desktop is also disclosed.

The invention discloses a structure and a manufacturing process of a low-cost carbon fiber composite material sky railway train body, and belongs to the technical field of application of composite materials on rail vehicles. The structure comprises a train body side wall, wherein end walls are assembled and connected to the both ends of the train body side wall; a top frame and a bottom frame arecorrespondingly assembled and connected to the inner top surface and the inner bottom surface of the train body side wall, a ceiling is assembled and connected to the outer top surface of the train body side wall, and a bogie mounting hole is formed in the ceiling; the train body side wall and the end walls both comprise reinforced rib frames, inner skins and outer skins, and grids of the reinforcing rib frames are filled with sandwich foam blocks; the ceiling comprises a sandwich panel, an upper skin and a lower skin, and the top frame, the bottom frame, the reinforcing rib frame, the inner skins, the outer skins, the upper skin and the lower skin are all integrally molded from carbon fiber composite materials; and the inner portions of the reinforcing rib frames are filled with sandwichfoam, and the purpose of satisfying the function and structure of the load bearing mode of a suspension-type train body on the premise of light weight of the train body is achieved.

The invention relates to the technical field of automobiles, in particular to a pure electric automobile chassis system adopting a light-weight coach chassis structure. The pure electric automobile chassis system comprises two longitudinal girders and a plurality of cross beams, wherein the plurality of cross beams are distributed at different-height layer surfaces and different longitudinal positions of the two longitudinal girders and are connected with the two longitudinal girders in a tenoning mode to form an internally-stressed dual-longitudinal-girder multilayer chassis frame; the front part of the dual-longitudinal-girder multilayer chassis frame is connected with a front axle carrier; the front axle carrier is fixed by virtue of the two longitudinal girders; the rear part of the dual-longitudinal-girder multilayer chassis frame is connected with a rear axle carrier which is fixed by virtue of the two longitudinal girders; the front axle carrier is connected with a front axle assembly, and the rear axle carrier is connected with a rear axle assembly; the dual-longitudinal-girder multilayer chassis frame is provided with a drive assembly and an energy assembly. The overall structure of the longitudinal girders is good in rigidity; a processing of assembling the front and rear axle carriers and the chassis frame is simplified, connection is reliable, and integral stress is realized; by virtue of a multilayer floor structure, installation of batteries and motors is convenient and the chassis space is saved.

The invention provides a sliding york which can process stretching movement swimmingly and reduce cost even if a carry object has heavy weight or stretching stroke. The sliding york apparatus (1) includes a fixing york (11), a middle york (21) supported to slide along length direction relative to the fixing york (11), and a front york (31) supported to slide along length direction relative to the middle york (21). A drive pinion driven by a rotary drive device (2) mounted on the fixing york (11) engages with a rack (22) mounted on the middle york (21) in the sliding york apparatus (1). All movable yorks (the middle york (21) and the front york (31)) are driven directly by the rotary drive device (2).

The invention provides a high-isolation dual-polarization circular-seam microstrip antenna unit, and the antenna unit can be used to increase the port isolation of an antenna substantially. A box body with a metal enclosure frame (2) is arranged between a metal plate (1) and a microstrip dielectric plate (5), the middle of a cavity of the box body is provided with a short-circuit stud (3) which is fixed to a radiation patch (6) via a metal screw (7) and improves the port isolation of the antenna, two feed holes (8) separate from each other, parallel with each other and symmetrical with each other by taking the short-circuit stud (3) as the center are prepared in the radiation patch (6), circular seams (9) which are concentric with the feed holes are formed in the outer rings of the feed holes respectively, the circular seams for linearly polarized feed in the diagonals of +/-45 degree simultaneously, and capacitive loading is carried out on the antenna. According to the invention, the port isolation of the antenna is improved, the antenna unit is characterized by high isolation, and the problem that a traditional patch antenna is low in bandwidth and port isolation is solved.

The invention provides a folding light path laser cooling atom device which is mainly composed of a vacuum tetrakaidecahedron, cooling light source assemblies, reflecting mirror assemblies, transfer mirror assemblies and anti-helmholtz magnetic field coils. The folding light path laser cooling atom device integrates a laser beam expansion collimation system, a folding light path, a polarization transformation system, the anti-helmholtz magnetic field coils and optical power real-time monitoring, six paths of laser required by a traditional laser cooling magneto optical trap is reduced to two paths of laser, the size and weight of an optical-mechanical system are reduced to the maximum degree, a space topology structure is simplified, and the optical-mechanical system is extremely good in mechanical property and thermal environment adaptability and can be applied to the severe environment of the space level. According to the folding light path laser cooling atom device, samples have passed ring die tests, such as a space level mechanical vibration test, a mechanical impact test, a thermal cycle test and a thermal vacuum test, long-term stable working can be kept, and the device can serve as a core optical-mechanical device of the laser cold atom application engineering.

The invention discloses a multilayer grating bearing cylinder and a preparation method thereof. The multilayer grating bearing cylinder is formed by nesting at least two single-layer grating cylinders, and the densities of the meshes of the adjacent single-layer grating cylinders are different. The preparation method for the multilayer grating bearing cylinder made from a composite material comprises the following steps: producing a wood pattern for casting a soft mode, producing a silicon rubber soft mode, assembling a mould, winding the soft mode in an assistance manner, carrying out vacuum bag moulding, demoulding and carrying out after-treatment, and integrally moulding the multilayer grating bearing cylinder; or preparing the single-layer grating cylinders according to the steps, and then assembling the single-layer grating cylinders into the multilayer grating bearing cylinder. The preparation method for the multilayer grating bearing cylinder made from metal or engineering plastic comprises the following steps: preparing a casting mould for the disassembly components of the single-layer grating cylinders, melting and casting, welding, and then assembling the single-layer grating cylinders into the multilayer grating bearing cylinder; or moulding in one step by a 3D printing technology. The multilayer grating bearing cylinder has the characteristics of good structural stability, light mass, high mechanical properties, difficulty of structural overall buckling instability, simple and practicable preparation method, and low cost.