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GPS/SINS (global positioning system/strapdown inertial navigation system) combined navigating system with high anti-interference performance and realizing method thereof

The invention discloses a GPS/SINS (global positioning system/strapdown inertial navigation system) combined navigating system with high anti-interference performance and a realizing method thereof, which belong to the technical field of navigation. The system comprises a GPS array antenna, a radio-frequency front end, an interference inhibiting module, a GPS baseband processing link, an SINS module and a combined navigating unit. The method comprises the following steps: 1, receiving a GPS signal and treating the GPS signal by the radio-frequency front end; 2, detecting high-power electromagnetic interference; 3, regulating an antenna beam in a self-adaptive way and filtering to remove a high-power interference signal; 4, carrying out the navigation resolution and the information fusion of a GPS and an SINS; and 5, obtaining an auxiliary parameter. The system and the realizing method have favorable dynamic tracking capability and anti-interference performance; the high-power interference signal can be effectively prevented from causing the saturation and the jamming of a GSP radio-frequency front end; and the robustness performance of the navigating system for dealing with a complicated interference environment is improved.
Owner:BEIHANG UNIV

A shared resource scheduling method and system for distributed parallel processing

InactiveCN102298539ASolve the access contention problemAvoid deadlockProgram initiation/switchingParallel processingShared resource
The invention discloses a shared resource scheduling method and system used in distributed parallel processing. The method and system are based on a distributed operation mechanism. The shared resource scheduling units distributed in each processor subsystem are distributed in each shared Resource locks and resource request arbitration units are implemented. These distributed processing units communicate by sending messages (resource access requests/permissions) to each other through the switching unit. The shared resource scheduling unit in the processor subsystem uses virtual queue technology to manage all resource access requests in the data cache, that is, a special queue is specially opened for each accessible shared resource. Resource locks in shared resources are used to ensure the uniqueness of access to shared resources at any time. Resource locks have two states: lock occupation and lock release. The request arbitration unit in the shared resource uses a priority-based fair polling algorithm to arbitrate resource access requests from different processing nodes. The invention can effectively avoid the competition problem when each processing node accesses the shared resource, can also avoid the deadlock of the shared resource and the starvation problem of the processing node, and provides high-efficiency mutually exclusive access to the shared resource.
Owner:EAST CHINA NORMAL UNIV

Liquid-crystal display device

The embodiment of the invention provides a liquid-crystal display device, and relates to the technical field of liquid-crystal display. By the adoption of the liquid-crystal display device, the resolution and illumination of display are not reduced when transparent display is achieved. A backlight module includes a luminescence part and a light guide plate; after entering the light guide plate ina certain angle range, light transmitted by the luminescence part is totally reflected; a display panel includes a first substrate, a second substrate and a liquid crystal layer; the second substrateis close to the backlight module; the first substrate includes colorful light resistance patterns and light shading patterns, wherein the light shading patterns are used for partitioning the colorfullight resistance patterns and enabling polarized light in a first polarization direction to transmit; the liquid-crystal display device further includes first gratings which are arranged at the side,close to or away from the display panel, of the light guide plate, and the orthographic projections of the first gratings on the light shading patterns are located within the borders of the light shading patterns; the first gratings are used for enabling light which is totally reflected in the light guide plate to be emergent as collimated polarized light, the polarization direction of the collimated polarized light serves as a second polarization direction, and the first polarization direction is perpendicular to the second polarization direction.
Owner:BOE TECH GRP CO LTD

Slope self-drainage anchor rod and construction method

The invention relates to a slope self-drainage anchor rod and a construction method. The self-drainage anchor rod comprises a hollow anchor pipe, an anchorage device, a cushion plate and a siphon, wherein one end of the hollow anchor pipe is open, the other end of the hollow anchor pipe is closed, the hollow anchor pipe is wrapped in a filter screen, threads are arranged at the open end of the hollow anchor pipe, water-pervious holes are formed in the rear middle of the hollow anchor pipe, the rear segment of the hollow anchor pipe and a slurry outlet pipe are perpendicularly connected, the end of the slurry outlet pipe is sleeved with a sleeve valve and a geotextile bag, and on the two sides of the slurry outlet pipe, the geotextile bag is clamped and fixed to the hollow anchor pipe through hoops; the lower side of the hollow anchor pipe is obliquely placed in a slope, the relative height difference between the pipe opening of the hollow anchor pipe and the pipe bottom of the hollow anchor pipe is kept smaller than 7 m, pulp solidifies in the geotextile bag and is anchored in stable soil, and the front segment of the hollow anchor pipe is anchored to the cushion plate through the anchorage device; a water suction pipe of the siphon is inserted in the hollow anchor pipe and stretches to the bottom, the water suction pipe is connected with a drainage pipe and a balance water outlet device through connector bent pipes on the slope, and a water inlet of the water suction pipe is as high as a water outlet of the balance water outlet device. The slope self-drainage anchor rod is simple in structure, can achieve anchoring and draining at the same time and is good in drainage effect, easy and convenient to construct and low in manufacturing cost.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY

Method and device for cleaning space debris

The invention discloses a method and device for cleaning space debris. According to the method, electromagnetic force is applied to the space debris running on an original orbit; the speed and/or direction of the space debris are/is changed under the action of the electromagnetic force; the space debris of which the speed is changed is changed to run on a new orbit under the action of gravity; at least the height of the perigee of the space debris on the new orbit is smaller than the height of the perigee of the space debris on the original orbit; the space debris running on the new orbit finally falls into the atmosphere of the earth under the action of atmosphere resistance. The device comprises a satellite bearing platform which is provided with an electric field device cleaning the space debris or a magnetic field device cleaning the space debris or a combination of the electric field device and the magnetic field device. The method and device for cleaning the space debris do not have high requirements for the accuracy of position detection of the space debris, micro space debris can be effectively cleaned, solar energy can be fully utilized for power generation, and self-carried energy is saved. The device for cleaning the space debris has the advantages of being simple in structure, low in manufacturing cost, and better in pulse action effect.
Owner:李怡勇 +3

Active noise reduction method and device

The invention provides an active noise reduction method and an active noise reduction device. The active noise reduction device comprises a storage unit which stores a signal sample of at least one type of valid sounds in advance, an acquisition unit used to acquire environment sound signals, a comparing unit used to compare the environment sound signals acquired by the acquisition unit with the signal sample of the at least one type of the valid sounds, stored in the storage unit in advance, so as to obtain the type of the valid sounds similar to the environment sound signals at a degree larger than a preset threshold value, an extraction unit used to extract a noise signal form the environment sound signals acquired by the acquisition unit according to the type of the valid sounds, obtained by the comparing unit, after signals corresponding to the valid sounds are eliminated from the environment sound signals and a generation unit used to generate a noise reduction signal according to the noise signal obtained by the extraction unit, wherein the noise reduction signal is used to counteract environment sounds after all the valid sounds are eliminated. The active noise reduction method and the active noise reduction device can solve the problem that active noise reduction can shield the valid sounds in the environment sounds.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI

Index-based computer continuous data protection method

The invention relates to an index-based computer continuous data protection method and belongs to the technical field of computer data storage and protection. Metadata of a data block comprises a data block identification, a timestamp and a storage pool address; an internal memory at a server side is internally provided with two buffer queues and an identification index table; a journal file is set up on a hard disk; after the data block is received by a storage pool, duplicate removal treatment is carried out; the metadata is stored and written into the storage area of one buffer queue by the server side according to the identification index table and the data block identification; if the storage area is full after the metadata is written up, the metadata in the storage area can be written into the journal file, and the identification index table is updated; and the following metadata can be written into the storage area of the other buffer queue. The method provided by the inventioncan be used for caching the metadata by the virtue of two buffer queues, thus preventing a system from being blocked; the identification index table and the journal file are set up, so that the queryspeed of the metadata is accelerated; and furthermore, the storage pool of the server side can be used for carrying out duplicate removal treatment on the data block, so that the storage space can besaved.
Owner:TSINGHUA UNIV

Thermal control method and system based on capillary slot group and thermal power combination

The invention is a capillary microgrooves and thermoelectric combined heat control method and system, relates to a heat dissipation and heat controlling method and device used in laser, electronic and electric apparatus. Liquid are heated for evaporation and boiling in capillary microgroove evaporator by heat member, steam flows into condensator through heat preservation flexible pipe, coagulates and heat releases in coagulating microgrooves in condensator under function of thermoelectric cooler on exine of condensator, and meanwhile thermoelectric cooler transmit heat from heat surface to heat dissipation elements (heat dissipation board or water-cooling heat radiator), and finally dissipate heat by air-cooling or water-cooling; coagulated liquid flows back to capillary microgroove evaporator through liquid return flexible pipe and connector to drain microgrooves, so that a circulation of heat extracting and releasing is completed, and components are cooled and heat controlled. Device adopting the inventive method includes a vacuum capillary microgroove evaporator, heat preservation flexible pipe, condensator, thermoelectric cooler, heat dissipation element, liquid return flexible pipe, connector to drain microgrooves.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI

Sand sieving device for civil engineering

The invention discloses a sand sieving device for civil engineering. The sand sieving device comprises a box body, a feeding hopper, a feeding channel, a pulverizing device, a sand sliding plate, a first spring, a sand and gravel rotating fan, a first sieve net, a second sieve net, a second spring, a third motor, a disc, a moving rod, a cross rod, a vertical rod and a hitting ball, wherein the pulverizing device comprises a first motor, a stirring shaft and a pulverizing rod; and the sand and gravel rotating fan comprises a second motor, a mounting shaft, a fan plate and a hot air blower. By arranging the pulverizing device, caking sand and gravel are pulverized, and insufficient sieving is avoided; by arranging the sand and gravel rotating fan, insufficient sieving caused by too-high sandfalling speed is avoided, and at the same time, the sand and gravel are dried, so that the blocking of sieve net holes by the wet sand and gravel and the influence of engineering use are avoided; byarranging the first sieve net, the second sieve net, the third motor, the disc, the moving rod, the cross rod and the hitting ball, multi-stage sieving can be carried out; and by driving the first sieve net and the second sieve net to swing upwards and downwards through cooperation, the sieving efficiency is increased.
Owner:江西同济建设项目管理股份有限公司
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