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323results about How to "Reduce performance degradation" patented technology

Wing antenna integrating structures and functions

The invention discloses a wing antenna integrating structures and functions. The wing antenna comprises a wing framework, a wing cover and a control and signal processing system. The wing cover sequentially comprises, from top to bottom, an upper panel, an upper honeycomb/foaming layer, a radio frequency function layer, a lower honeycomb/foaming layer and a lower panel. Optical fiber is laid on the lower panel. Bragg gratings are arranged at intervals on each stick of optical fiber. The radio frequency function layer comprises a radio frequency circuit layer, a wave control circuit layer and a packaging framework. A liquid cooling passage is manufactured in the radio frequency function layer. The radio frequency circuit layer comprises an antenna array face composed of a plurality of antenna sub-arrays arrayed in a distribution arraying mode. Each antenna sub-array is composed of a plurality of micro-strip radiation units. The wing antenna has the advantages of reducing the weight of a plane body, improving the pneumatic performance of an aircraft, being good in heat dissipating, being capable of monitoring the deformation and the strength of the wing structure in real time and automatically compensating the influence of structure vibration and deformation on electrical performance, and ensuring the electromagnetic performance stability of the antenna in severe environments.
Owner:XIDIAN UNIV

Method and system based on real-time communication among hybrid multi-system cores

The invention provides a method and system based on the real-time communication among the hybrid multi-system cores. The method comprises the following steps of when the real-time operating system collects data, filling a network application layer data packet with the data through a network application, sending the data packet to an underlying network driver through a network protocol stack, analyzing the data packet by the underlying network driver, packaging the data packet into a new data packet format, and filling a corresponding mapped shared memory data area with the data packet; afterthe filling is completed, setting a flag bit of inter-core communication, triggering inter-core interruption or inter-core notification, and notifying another operating system processor core to receive the data packet; using the processor core of the other operating system to detect and check whether the flag bit of the processor core is an inter-core notification generated by the other core or not; and if yes, in response to the interruption, obtaining data from the shared memory data area, submitting the data to a protocol stack of the user layer, and submitting the protocol stack to the user layer for processing, thereby shielding the direct operation of the user layer on the bottom layer, and realizing the data communication in a hybrid multi-system or AMP mode.
Owner:北京翼辉信息技术有限公司

Method and device for transmitting channel measurement pilot frequency

The invention discloses a method and a device for transmitting channel measurement pilot frequency, which are applicable to channel measurement pilot frequency in an LTE-A (Long Term Evolution-Advanced) system and are used for solving the problem on transmitting channel measurement pilot frequency in the LTE-A system. The mapping pattern of the pilot frequency of an original antenna port of an R8 protocol version system in two first symbols of each subframe is ensured to be unchanged by calculating the control symbols occupied by all users and sending the channel measurement pilot frequency on redundant control symbols, R8 users are compatible, and the influence on R8 protocol version users is small. The channel measurement pilot frequency provides pilot frequency information required by high-order MIMO (Multiple Input Multiple Output) and COMP (Coordinated Multi-Point), so that LTE-A users can improve single-link quality conveniently. The total number of the channel measurement pilot frequency is small, so that the expense of the pilot frequency is reduced. The channel measurement pilot frequency full bandwidth is sent in all redundant antenna ports, the measurement information of all bandwidth and all antenna ports of channel measurement can be ensured, and the throughput of the LET-A system is increased.
Owner:ZTE CORP

Silicon carbide trench gate power metal-oxide-semiconductor field effect transistors (MOSFETs) device and manufacturing method thereof

InactiveCN105047721AReduced effective mobilityAvoid High Threshold VoltageSemiconductor/solid-state device manufacturingSemiconductor devicesHigh energyP type silicon
The invention provides a silicon carbide trench gate power metal-oxide-semiconductor field effect transistors (MOSFETs) device and a manufacturing method thereof. The device comprises an n-type silicon carbide substrate, an n-type trench, a trench gate medium, a gate contact, a source contact and a drain contact, wherein an n-type silicon carbide drift layer is arranged on the substrate, and comprises p-type silicon carbide regions with intervals; an n+ silicon carbide source region is formed between the p-type silicon carbide regions; and the n-type trench is located between the p-type silicon carbide regions and is arranged in the n-type silicon carbide drift layer below the n+ silicon carbide source region. On the basis of a vertical double-injection MOSFET structure, the surface of the trench is counter-doped with an n-type doped impurity, so that a surface accumulation layer is realized; reduction of the effective electron mobility of the surface accumulation layer of the trench caused by high-energy and large-dose ion injection and high-temperature annealing is avoided; performance degradation of the device is reduced; the anti-latch-up capacity is improved; the manufacturing method of the silicon carbide MOSFET device is simplified; and the silicon carbide trench gate power MOSFETs device is suitable for industrial production.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2

Display panel and display device

The embodiment of the invention discloses a display panel and a display device, relates to technical field of display, and aims to prevent light rays reflected by a block matrix from being irradiated onto the active layer of a thin film transistor in order to delay the performance deterioration of the thin film transistor and ensure the display quality. The display panel comprises the thin film transistor and the black matrix which are arranged oppositely, a grid line and a data line, wherein the thin film transistor comprises a grid electrode, a source electrode, a drain electrode and an active layer; the grid electrode is positioned on one side, which is far away from the black matrix, of the active layer; the source electrode and the drain electrode are positioned on one side, which is close to the black matrix, of the active layer; the source electrode is positioned between the drain electrode and the grid line; the side edge, which faces away from the grid electrode, of the grid line is taken as a first edge; the source electrode is close to the drain electrode, and the side edge, which is parallel to the grid line, of the source electrode is taken as a second edge; the distance between the first edge and the second edge is greater than or equal to a preset distance D, so that light rays entering from one side of the thin film transistor are prevented from being irradiated onto the surface of the active layer after being reflected by the black matrix. The display panel is applied to manufacturing of the display device.
Owner:BOE TECH GRP CO LTD +1

Preparation method of octahedral porous molybdenum dioxide and application of octahedral porous molybdenum dioxide in lithium-ion battery

The invention discloses a preparation method of octahedral porous molybdenum dioxide and an application of the octahedral porous molybdenum dioxide in a lithium-ion battery. The preparation method comprises the steps of: adding trimesic acid and tetramethyl ammonium hydroxide to a solution containing a copper salt and a phosphomolybdic acid and/or phosphomolybdate for stirring to form an emulsion; transferring the emulsion into a hydrothermal reaction kettle for hydrothermal reaction to obtain a precursor compound; and putting the precursor compound into a protective atmosphere, carrying out thermal treatment at a high temperature and then washing the product to obtain a porous octahedral molybdenum dioxide material which is formed by stacking and assembling ultrafine nanoparticles, is uniform in shape and form and good in stability and has a porous characteristic. The molybdenum dioxide material is applied to the lithium-ion battery as a negative electrode material, so that the rate capability and the cycling stability of the electrode material are improved under the premise of ensuring the specific capacity; the preparation technology of the molybdenum dioxide material is simple; the cost is low; and the molybdenum dioxide material has a relatively good research prospect.
Owner:CENT SOUTH UNIV

Method for manufacturing afebrile array wave-guide grating based on flat-plate wave-guide movement

The invention discloses a method for manufacturing an afebrile array wave-guide grating based on flat-plate wave-guide movement, which comprises the following steps that a common silicon-based silica array wave-guide grating chip is divided into a first part and a second part along a cutting line for inputting a flat-plate wave guide or a cutting line for outputting the flat-plate wave guide on the array wave-guide grating chip; a temperature compensating rod spans the cutting line of the array wave-guide grating chip and is fixed with the surfaces of the first part and the second part of the array wave-guide grating chip; and the expansion and contraction of the temperature compensating rod drive the first part and the second part to move relatively, so as to compensate wavelength shift caused by the temperature and manufacture the afebrile array wave-guide grating. The method doses not adopt a substrate. The first part a and the second part b are placed on a six-axes precision fine tuning bracket to be fully and freely adjusted in six directions; the device cost is reduced; the processing steps are simplified to the maximum degree so that the manufacture of the device is easy to implement; deterioration of the performance of the device is reduced to the maximum degree; and the stability is strong.
Owner:GUANGXUN SCI & TECH WUHAN
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