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589results about How to "Promote reproduction" patented technology

Device and method for converting spatial audio signal

An audio processor for converting a multi-channel audio input signal, such as a B-format sound field signal, into a set of audio output signals, such as a set of two or more audio output signals arranged for headphone reproduction or for playback over an array of loudspeakers. A filter bank splits each of the input channels into frequency bands. The input signal is decomposed into plane waves to determine one or two dominant sound source directions. The(se) are used to determine a set of virtual loudspeaker positions selected such that the dominant direction(s) coincide(s) with virtual loudspeaker positions. The input signal is decoded into virtual loudspeaker signals corresponding to each of the virtual loudspeaker positions, and the virtual loudspeaker signals are processed with transfer functions suitable to create the illusion of sound emanating from the directions of the virtual loudspeakers. A high spatial fidelity is obtained due to the coincidence of virtual loudspeaker positions and the determined dominant sound source direction(s). Improved performance can be obtained in the case where Head-Related Transfer Functions are used by differentiating the phase of a high frequency part of the HRTFs with respect to frequency, followed by a corresponding integration of this part with respect to frequency after combining the components of HRTFs from different directions.
Owner:HARPEX LTD

External water interception and purification type urban river multi-element ecological embankment physical structural system

The invention discloses an external water interception and purification type urban river multi-element ecological embankment physical structural system. The urban river multi-element ecological embankment physical structural system comprises a first-class platform ecological embankment physical structural system, a second-class platform ecological embankment physical structural system and a slope ecological embankment physical structural system which are organically combined on a river bank slope, wherein the first-class platform ecological embankment physical structural system is provided with an urban surface source sewage runoff collecting groove, a groove type ecological concrete building block, a vertical first-class retaining wall and the like; the second-class platform ecological embankment physical structural system is provided with a sedimentation and purification tank, a current restriction baffle and the like; and the slope ecological embankment physical structural system is provided with a bedding, iconological concrete, a plant growth pad and the like. The urban river multi-element ecological embankment physical structural system effectively integrates water treatment functions such as rainfall surface source collection and purification, discharge port sewage interception and purification, physical absorption and filtration and plant absorption and purification on the premise that the stability and safety of bank slopes are maintained, ecological environments and landscapes of urban riparian zones are improved, and the self cleaning capacity of rivers is well played.
Owner:NANJING UNIV +2

Medical scaffold with inner coating film, and preparation method for medical scaffold

InactiveCN102430157ALittle elasticityEliminate defects with high embolism rateStentsCoatingsFiberMedical equipment
The invention relates to medical equipment, particularly a medical scaffold with an inner coating film, and a preparation method for the medical scaffold, and belongs to the field of medical equipment. In the medical scaffold with the inner coating film, a non-woven inner coating film of which fibers are distributed on the axial direction of the medical scaffold is prepared on the inner surface of an inner film by an electrospinning method by taking a coating film scaffold as a basis, wherein the coating film scaffold consists of a netlike scaffold which is formed by weaving medical alloy wires, an electrospinning non-woven inner film and an electrospinning non-woven outer film; and the thickness of the inner coating film is 2 to 6 mu m. During preparation of the medical scaffold with the inner coating film, the inner coating film, the inner film and the outer film are prepared sequentially, and the inner coating film in the medical scaffold improves the biocompatibility with tract tissues of a human body, facilitates adhesion, migration and reproduction of endothelial cells at two ends of the medical scaffold, promotes quick endothelialization of the medical scaffold, and prevents the medical scaffold from becoming narrow again. The preparation method for the medical scaffold is simple, convenient to operate, and low in cost, and suitable for preparation of medical scaffolds with different diameters and lengths.
Owner:WUHAN TEXTILE UNIV

Seashell and algae shallow-sea ecology rearing device and method

InactiveCN101491221AAchieve breeding effectIncrease organic nutrientsClimate change adaptationPisciculture and aquariaDiseaseShallow sea
The invention discloses a device for ecologically culturing seashell and alga in shallow sea and a method thereof. The device comprises a seashell culture raft and an alga culture raft. The seashell culture raft comprises at least two paralleled floating ropes; buoys are arranged on the floating ropes and are connected with the floating ropes through floating ties; the two ends of each floating rope are fixed by underwater fixing mechanisms; the alga culture raft made by at least one culture curtain is arranged above each two adjacent floating ropes; the adjacent culture curtains are fixed by floating bamboo perpendicular to the floating ropes; and the two ends of the floating bamboo are connected with the floating ties. The device can be used to carry out the hanging culture of the seashell on the floating ropes and carry out the culture of the alga in the culture curtains floating above the floating ropes, thereby realizing the composite culture of the seashell and the alga. The device and the method have the advantages of reducing the culture cost, improving the culture efficiency and culture space utilization factor, and having good effects on the comprehensive use of shallow sea waters, the improvement of the water environment and the prevention and control of diseases.
Owner:SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI

Compound fertilizer special for flue-cured tobacco

The invention discloses a compound fertilizer special for flue-cured tobacco, which belongs to the field of fertilizers. The compound fertilizer comprises the following components in percentage by mass: 31.34-32.40 percent of organic substance, 64.46-65.34 percent of inorganic fertilizer and 2.93-3.88 percent of trace element, wherein the organic substance comprises four kinds of farm fertilizer,such as chicken manure, pig manure, cow manure and oil cake. The compound fertilizer is prepared by fermenting, drying and pulverizing treatment. The compound fertilizer which is suitable for the flue-cured tobacco variety is researched according to the fertilizer demanding rule of cigarette 103 in the flue-cured tobacco variety represented in the Luzhou cigarette area; on one hand, the tobacco leaf yield can be increased and the tobacco leaf quality is improved, the income is increased and the production investment can be reduced; on the other hand, the pollution of fertilizer loss to the environment can be reduced. After the organic and inorganic compound fertilizer is applied to the soil, beneficial microorganisms in the soil can be rapidly activated and bred, nutrient substances unabsorbed by the flue-cured tobacco are changed into absorbable nutrient substances, and the fertilizer effect is durable; meanwhile, the invention has the effects of improving soil ground temperature andsoil and increasing both production and income of the tobacco.
Owner:罗定棋

Device and method for testing automotive active safety systems on bench

The invention discloses a device and a method for testing automotive active safety systems on a bench. The device comprises a camera bellow, a to-be-tested system, a display, an upper computer and a lower computer. Scene animation required by tests is generated by the upper computer and is displayed via the display; the scene animation is acquired by the to-be-tested system; movement of a to-be-tested automobile is simulated by the lower computer in real time, the lower computer is communicated with the to-be-tested system via a CAN (controller area network) bus, automobile state and driver operation information is transmitted to the to-be-tested system, and bus data transmitted by the to-be-tested system are received; the lower computer is communicated with the upper computer via a network cable, and running data of the automobile are transmitted to the upper computer, so that the scene animation can be updated in real time; the upper computer is further used as a test managing and monitoring platform. The device and the method have the advantages that active safety tests are carried out on the automobile on the bench, so that field tests or field data acquisition can be omitted, test workload can be reduced, test risks and the test cost can be decreased, and the test repeatability can be improved; large test working condition databases can be omitted, and accordingly the test working condition data can be conveniently managed.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD

Numerical method for graded crushed stone dynamic triaxial test

The invention discloses a numerical method for a graded crushed stone dynamic triaxial test. The numerical method comprises the following steps of: simulating the graded crushed stone dynamic triaxial test through establishing a physical model and a mechanical model by using a PFC2D software platform, wherein the simulation operation comprises test of basic parameters, simulation of a test model and generation of a graded crushed stone simulation specimen; secondly, giving micro mechanical parameters to the physical model, and constructing the mechanical model; and then, carrying out repeated dynamic load simulation on the graded crushed stone simulation specimen so as to obtain a graded crushed stone stress-strain curve and a graded crushed stone permanent deformation-loading frequency curve. According to the numerical method disclosed by the invention, the graded crushed stone permanent deformation-loading frequency curve in a triaxial test can be reproduced accurately, conveniently and quickly, and a graded crushed stone deformation rule is disclosed, so that the graded crushed stone fracture mechanism is favorable to research intensively; and the problems of high instrument price and inconvenience for operation in an indoor dynamic triaxial test are avoided, so that the test efficiency is improved, and the research cost is saved.
Owner:CHANGAN UNIV
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