252results about How to "Enhance the edge effect" patented technology

An object of the present invention is to provide a pneumatic tire capable of ensuring both of the ice braking performance and the ice turning performance while increasing the dry steering stability performance. To achieve the above object, a sipe extending in a width direction of the tire is formed a land portion, the sipe having: pluralities of wide portions each having an inclined plane that begins from the tread surface of a road surface, and terminates in the half way of a sipe wall while inclining so that a sipe width decreases toward the groove bottom of the sipe, and a pair of side faces connecting the inclined plane and the sipe wall therebetween, wherein the pluralities of wide portions are located alternately on both sipe walls along a longitudinal direction of the sipe.

A pneumatic tire has a tread pattern including a plurality of main grooves extending along a tire circumferential direction, and a shoulder land portion constructed by a rib or a block row formed in an outer side in a tire width direction of the main groove positioned in an outermost side. A circumferential sipe is provided in each of the shoulder land portions in both sides in the tire width direction. The number of the circumferential sipes provided in the shoulder land portion in a vehicle inner side is larger than the number of the circumferential sipes provided in the shoulder land portion in a vehicle outer side.

A pneumatic tire according to the present invention includes blocks on its tread which are segmented by plural circumferential grooves 3 extending along a tire circumferential direction and plural lateral grooves 5 extending along a tread width direction. Circumferential sipes extending along the tire circumferential direction are provided in the blocks. Inside circumferential sipes extend straight along a tire radial direction and outside circumferential sipes extend along the tire radial direction in zigzag patterns. According to the present invention, a handling performance, especially, a cornering performance can be improved regardless of road surface conditions.

An off-road motorcycle tire having a block pattern comprising a plurality of blocks 11 defined by tread grooves 10, each block 11 having a circumferential profile 16 of top surface 12 in the form of a straight line or a circular arc having a radius Ra of curvature of at least 500 mm, in which the circumferential profile denotes a profile in the circumferential section which passes through the centroid G of the top surface 12 and is parallel to the tire equatorial plane Cc. According to the invention, the ground contact pressure at the periphery of the top surface of blocks 11 is prevented from lowering to enhance the edge effect.

The invention discloses a method for improving the edge performance of a wireless communication system, which comprises the following steps: dividing each cell in a wireless communication network into a central region and a plurality of edge regions, wherein two small adjacent cells are adjacent in an edge region thereof; selecting all the frequencies in a useable frequency range to transmit signals with a user terminal of the central region in each cell; and selecting all the frequencies in a useable frequency range to transmit signals with user terminals of the edge regions in each cell, wherein the two adjacent edge regions of any adjacent regions select different frequencies and the transmitted signals with the user terminals in the edge regions contain multi-layer data at the same time and at the same frequency. The method can be used for solving the problem of unbalanced throughput of the central regions and the edge regions of the cell and can obtain frequency spectrum utilization rate similar to a shared-frequency network.

The invention discloses an ultra-wide-band horizontally-polarized omnidirectional connection type Vivaldi circular array antenna, and mainly solves the problems of wide frequency band, omnidirectional horizontal polarization and miniaturization of an antenna cannot be satisfied in the prior art. The ultra-wide-band horizontally-polarized omnidirectional connection type Vivaldi circular array antenna comprises a radiation unit (1), a feeding network (2) and a dielectric plate (3), wherein the radiation unit (1) is a 16-element connecting type Vivaldi antenna array which is formed by a Vivaldi unit around a center in a rotating manner; the feeding network (2) adopts a one-into-sixteen broadband Wilkinson power divider and a coupling microstrip feeder line; electromagnetic energy is coupled to the radiation unit through the coupling microstrip feeder line; the dielectric plate (3) adopts a Kangtaini (a Chinese brand name)dielectric plate with a dielectric constant of 2.55; the radiation unit and the feeding network are printed on the upper and lower surfaces of the dielectric plate; and the centers of the radiation unit and the feeding network coincide with that of the dielectric plate. The circular array antenna has the characteristics of ultra wide band, omnidirectional horizontal polarization and miniaturization, and can be used in a full-coverage ultra-wide-band wireless communication system in the peripheral regions.

The invention discloses a microwave synthesis method for changing a morphology of MIL-53-Fe by a polymer; with 1,4-terephthalic acid (H2BDC) and a trivalent iron salt as raw materials, and N,N-dimethyl formamide (DMF) as a reaction solvent, the polymer is added, microwave reaction conditions are controlled, MIL-53-Fe can be quickly synthesized and obtained, and the regular octahedron morphology ofthe MIL-53-Fe is transformed into rectangular-like cones having better material grafting, attachment and edge effects and small size advantages.

The invention relates to a structure and a method for improving the current crowding effect of a microwave power transistor emitter region. The structure is characterized in that the emitter region isprovided with a polysilicon thin-layer distribution resistor which is parallel to the surface of a silicon substrate and an emitter junction for balancing a distribution resistor of a base region below the emitter region and improving the voltage consistency of the emitter junction so as to improve the current crowding effect of the emitter region; and the thin-layer distribution resistor of theemitter region is made of doped polysilicon and acquires a resistor value of the needed doped polysilicon resistor by controlling the thickness and the side undercutting depth of silicon dioxide forming a window of the emitter region. The invention has the advantages that the polysilicon thin-layer distribution resistor parallel to the surface of the silicon substrate and the emitter junction is led in the emitter region; and when a current of the emitter region flows by the distributed resistor, a generated voltage drop compensates the voltage drop of a base current on an inner base resistor,reduces the voltage drop differences of the emitter junction in different positions, improves the current crowding effect, expands the effective working area of the emitter junction and improves themicrowave output power of a chip unit area.

The invention discloses a laser cutting system for plates and a cutting processing method thereof, wherein the laser cutting system for plates comprises an installation seat, a laser focusing component and a high-speed lifting driving device, and the laser cutting processing method for plates comprises the following steps: (a) placing the plates to be cut on a processing platform, wherein the laser cutting system for plates is arranged in the position above the processing platform; and (b) generating relative motion between the processing platform and the laser cutting system for plates in the horizontal direction according to setting, wherein at the same time, the laser focusing component of the laser cutting system for plates makes high-speed up and down lifting circulating motion under the driving action of the high-speed lifting driving device, thereby cutting the plates. The laser cutting system for plates provided by the invention has the advantages of simple composition and low manufacturing cost, the cutting efficiency of the cutting processing method can be greatly enhanced, the processing speed is high, and the obtained cut product has the advantages of better edge effect, level cut notch and high yield.

The invention relates to a method for processing special-shaped glass with data control. A processing device is formed by a gantry frame, a mobile platform, a folding stepping/servo mechanism, a Y axis screw rod, an X axis screw rod, a Z axis screw rod, a transverse stepping/servo mechanism, an up-down stepping/servo mechanism, a grinding head mechanism, a waterproof baffle, a self-lubrication system, a positioning adsorbing disc, a control box, a polishing abrasion wheel, an accurate grinding abrasion wheel, a rough grinding abrasion wheel and a transverse rail. Quick positioning, one-button starting, automatic tool adjusting and automatic tool replacing are achieved, the grinding functions, including rough grinding, accurate grinding, polishing and the like, on complex special-shaped glass can be completed rapidly within a few minutes by a three-axis-association data control system, working efficiency is high, an edge grinding effect is ideal, personal safety of operating personnel is ensured, labor intensity of the operating personnel is reduced, processed top-grade glass are more beautiful, and processing technology is more precise.

The invention discloses a thermosetting polymer matrix composite resistance welding device and method. A layer of thermoplastic bonding agent is co-cured on the surface of a thermosetting polymer matrix composite structural part to obtain a weld part, resistance welding of a thermosetting polymer matrix composite is realized, the welding device adopts a general thermosetting polymer matrix composite resistance welding method and is improved: firstly, a pressurizing device is used for exerting pressure on the weld part, a heating resistor connected onto copper plate wire clamps is charged with currents, a cooling fan is switched on to perform active cooling on two ends simultaneously, after a temperature controller detects that the welding interface temperature reaches 200 DEG C through K-thermocouples, a direct-current stabilized power supply is switched off, the welding interface temperature is reduced, and a final welded joint is formed through cooling. With the adoption of the welding method, the fringe effect can be effectively reduced, uniform temperature distribution is realized, the welding stress is reduced, and the energy consumption is reduced.

The invention provides a manufacturing process of a VARI composite material foam sandwiched wedge-shaped part and the obtained wedge-shaped part. The surface of a forming mold is paved with demolding cloth I and then is paved with lower skin, wedge-shaped sandwiching foam is positioned to the lower skin and is paved with upper skin; then, demolding cloth II, a diversion medium, a rubber injection pipeline, an exhausting pipeline and a vacuum bag film are sequentially paved, the vacuum bag film is firmly bonded with a sealing rubber strip, packaging and vacuumizing are performed to complete the processes of vacuum detection, resin preheating, mold preheating, resin injection, closing of the rubber injection pipeline, heating and curing and demolding. A resin hole path penetrating the wedge-shaped sandwiching foam is formed in the wedge-shaped sandwiching foam to accelerate rapid infiltration of fibers in the lower skin under the wedge-shaped sandwiching foam. Compared with traditional VARI, the problems of a VARI foam sandwiched structure part are solved, and meanwhile the defects of the edge effect of wedge-shaped foam part VARI, needle holes formed in the surface of the part, rubber lack and the like are overcome through reasonable flow pass arrangement.

The invention discloses an orientated-growth latticed high-performance carbon nano-tube field emission array, which comprises a conductive substrate and latticed orientated carbon nano-tube arrays grown on the substrate, wherein the carbon nano-tube arrays are distributed into a latticed shape and form an integral structure. By the technical scheme, the structural stability of small-size carbon nano-tube arrays is improved, the edge effect of the carbon nano-tube arrays is enhanced, and then a turn-on electric field and a threshold electric field are reduced to improve the emission current density. The orientated-growth latticed high-performance carbon nano-tube field emission array is suitable for field emission devices having high requirements on current emission performance, such as electron sources in an X ray source, a microwave amplifier, a field emission scanning electron microscope and the like.

A pneumatic tire in which a tread part is provided with a pair of central main grooves extending continuously around the circumference of the tire on both sides of a tire equator C, and central thin grooves extending continuously around the circumference of the tire on the tire-axially inner sides of the central main grooves and having less groove width than the central main grooves. The central thin grooves include a linear first central thin groove running along the tire circumference, and zigzagging second central thin grooves. The first central thin groove is provided on the tire-axially inner sides of the second central thin grooves.

The invention relates to the field of ceramic machining equipment, in particular to a ceramic edge grinding machine. The ceramic edge grinding machine comprises a base, a revolution plate arranged on the base, a plurality of clamping assemblies used for fixing ceramic work-pieces to be ground, and a rotation assembly driving the clamping assemblies and the ceramic work-pieces, to be ground, on the clamping assemblies to rotate. The center of the revolution plate is located on the base and can rotate around the center in the circumferential direction, and the clamping assemblies are arranged along the edge of the revolution plate in the periphery direction; the base is provided with a telescopic air cylinder, the telescopic air cylinder is provided with an edge grinding assembly used for machining the ceramic work-pieces to be ground, and the telescopic air cylinder drives the edge grinding assembly to move back and forth in the axial direction. The ceramic edge grinding machine is novel in structure, and the effect of grinding edges of the ceramic work-pieces is good.

The invention discloses thio salt modified epoxy resin and a preparation method and application of the thio salt modified epoxy resin. The thio salt modified epoxy resin is obtained by modifying epoxyresin by the thio salt; an emulsifier for a core-shell emulsion polymerization reaction is further prepared; and the emulsifier is further applied to an electrophoretic coating. The thio salt modified epoxy resin provided by the invention is used as an emulsifier for the core-shell emulsion polymerization reaction, and the thio salt modified epoxy resin emulsion is designed to participate in thefilm formation of the electrophoretic coating, is completely different from a general emulsifier in structure, does not act as a residual component, and does not have side effects.

A pixel-shared displaying device for LED screen is composed of the video source of digital signals, scan board and display screen. Its display method includes such steps as defining 4 scan coordinates for LEDs on screen according to display modes, setting up relative field sequence for each scan coordinate, storing the scan coordinates and field sequence to the frequency quadrupler, controlling scaning of scan board by 4x frequency and outputting the signals from digital video source to screen.