581results about How to "Improve the coupling effect" patented technology

A white, single or multi-color light emitting diode (LED) includes a mirror for reflecting photons within the LED; a first active region, adjacent the mirror, including one or more current-injected layers for emitting photons when electrically biased in a forward direction; a second active region, adjacent the first active region, including one or more optically-pumped layers for emitting photons, wherein the optically-pumped layers are optically excited by the photons emitted by the current-injected layers, thereby recycling guided modes; and an output interface, adjacent the second active region, for allowing the photons emitted by the optically-pumped layers to escape the LED as emitted light.

The invention discloses a music recommending method and system which are used in a mobile terminal. The contextual information of music is obtained first. The method comprises the steps that the contextual information of a user is obtained; and the matching degree of the contextual information of the user and the contextual information of the music is computed, and K pieces of music with the computed large matching degrees are recommended to the user, wherein, K is an integer larger than or equal to 1. According to the method and system, the contextual information of the user and the contextual information of the music are subjected to matching computing, the music with the high matching degrees is recommended to the user, the coupling performance of the music with the user is enhanced, and accordingly music recommending accuracy is improved.

The invention discloses a grating coupler which is high in performance, low in cost and easy to package, comprising a reflecting layer, an isolating layer, a waveguide layer, a lower cladding and a substrate layer, wherein the lower cladding layer, the waveguide layer, the isolating layer and the reflecting layer are arranged on the substrate layer in sequence; the waveguide layer is provided with a grating; and the substrate layer is provided with a fiber alignment groove. A package structure of the grating coupler provides an efficient package scheme for nano waveguide devices, reduces the process difficulty and improves the feasibility of scale package integration.

The invention provides a preparation method of modified fly ash. In a sealed negative-pressure system, fly ash is adopted as a raw material. When winnowing grading processing is carried out upon the fly ash particles, the graded fine particles and ultra-fine particles are subjected to a chemical-spraying surface modification treatment; the obtained products are heated and dried, such that a target product of the modified fly ash is obtained. According to the modified fly ash provided by the invention, one or more saturated-structure or unsaturated-structure organic groups are bonded on the surfaces of the particles, and an activation index is higher than 0.9. The invention also discloses a fly ash sorting and modifying apparatus. The technical method provided by the invention is energy-saving and environment-friendly, and is advantaged in high utilization rate of fly ash. The obtained modified fly ash is advantaged in wide particle fineness selection range, small dosage of a coupling agent, uniform distribution of the coupling agent, good adaptability with polymer substrates, and the like. In rubber product filling, the modified fly ash can be used for completely replacing calcium carbonate and powdered steatile, or partially replacing carbon black. The modified fly ash is a renewable resource material with low cost and high quality.

The invention discloses a subwavelength plasmon polarization converter which comprises an incident polarizer and an emission polarizer which are separated by a medium or air layer. Both the incident polarizer and the emission polarizer are made of plasmon materials, small holes with subwavelength dimensions are engraved on the two polarizers, an included angle is formed between each small hole on the incident polarizer and the corresponding small hole on the emission polarizer, and the end points of the above two small holes are in intersection. When the included angle of two small holes is less than 90 degrees, the incident polarizer only allows the coupling entering of one polarized electromagnetic wave, and the emission polarizer only allows the emission of an electromagnetic wave which is orthogonal with the above polarized direction. By using a near field coupling effect between orthogonal rectangular holes, according to the system, the limitation of the Malus law can be broken, and thus the electromagnetic wave generates effective transmission and the polarization direction is rotated for 90 degrees. The converter can be used as a single-direction transmitter, a subwavelength switch and a modulator.

The invention belongs to the technical field of inorganic material, and specifically relates to a preparation method of a highly-ordered nano particle superlattice material. The preparation method comprises the following steps: adopting a solution method to prepare mono-dispersed metal oxide nano crystals, inducing the nano particles to carry out self-assembly through the solution evaporation to prepare a three-dimensional ordered nano crystal superlattice solid, subjecting the solid to high-temperature carbonization so as to carbonize the organic molecules on the particle surfaces to obtain carbon-coated oxide nano particle superlattice, removing the oxide nano particles through acid etching so as to obtain a highly-ordered mesoporous carbon material, taking the mesoporous carbon material as the template, pouring a proper precursor into the channels in the carbon material, and finally subjecting the carbon material to steps of hydrolysis and crystallization so as to obtain the superlattice material of corresponding nano particle. The preparation has the advantages of simpleness, easily available raw material, and low cost. The size and morphology of nano particles can be modulated by adjusting the particle size and morphology of the initial metal oxide nano particles.

A p well serving as a channel region of a MOSFET is formed on one side of an n− layer and an n+ drain region is formed on the other side. Above the n− layer, a plurality of first floating field plates are formed with a first insulating film interposed therebetween. A plurality of second floating field plates are formed thereon with a second insulating film interposed therebetween. Assuming that the thickness of the first insulating film is “a” and the distance between the first floating field plates and the second floating field plates in a direction of thickness of the second insulating film is “b”, a relation a>b is held.

The present invention discloses a short fibre / rubber composite for manufacturing driving belt, comprising hydrogenized nitrile rubber, styrene butadiene rubber, short fibre made from the reinforcement cord of the worn-out driving belt, chloroprene rubber, vulcanizing agent, coupling agent and phenol-formaldehyde resin. The driving belt of the invention made from the composite has a good thermal endurance, self- lubricity, oil resistance and durability. And the reinforcement cord and the special binding agent are unused to manufacture the driving belt, which economizes the cost of manufacture, prolongs the service life of the driving belt greatly, and raises the drive efficiency.

The invention belongs to the field of wireless power transmission and particularly relates to a primary-secondary self-coupling magnetic resonance wireless power transmission device and an operation method thereof. The primary-secondary self-coupling magnetic resonance wireless power transmission device comprises an input circuit, transmitting coil series resonance capacitors, a primary-secondary self-coupling magnetic resonance coil, receiving coil series resonance capacitors and a shaping and loading circuit. The input circuit comprises an input alternating current power supply, alternating current power supply impedance and a high-frequency high-power resonance transmission power supply. The primary-secondary self-coupling magnetic resonance coil comprises a transmitting coil, a receiving coil, a single-coil open-loop structure of a primary-secondary self-coupling coil, a single-coil closed-loop structure of the primary-secondary self-coupling coil, a multi-coil open-loop structure of the primary-secondary self-coupling coil and a multi-coil closed-loop structure of the primary-secondary self-coupling coil. By means of the primary-secondary self-coupling magnetic resonance wireless power transmission device, high power, high frequency and compact space of magnetic resonance wireless power transmission can be effectively achieved.