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51results about How to "Guaranteed excellent performance" patented technology

Rotor unmanned aerial vehicle coverage search flight path planning method for polygonal region having no-fly zone

ActiveCN105973235AReduce the number of decomposition search unitsAvoid crossingNavigational calculation instrumentsNo-fly zoneGrating
The invention relates to a rotor unmanned aerial vehicle coverage search flight path planning method for a polygonal region having a no-fly zone, wherein the method comprises the steps: step 1, determining a coverage direction, wherein the direction from a polygon width-corresponding top point to edge is a coverage direction for realizing shortest-path polygon region coverage searching; step 2, transforming a coordinate, taking an X axis of a new coordinate system (OX'Y') as a coverage direction, and making an origin point of the new coordinate system (OX'Y') the same as an origin point of an original coordinate system; step 3, according to the transformed to-be-covered polygon region and obstacle, carrying out Boustrophedon searching unit decomposition; step 4, determining an alternative optical grating line search flight path set of each searching unit; step 5, determining the sequence and the flight path of each searching unit of the unmanned aerial vehicle based on a greedy strategy; and step 6, carrying out coordinate inverse transformation, transforming flight path points into flight path points in the original coordinate system through coordinate inverse transformation, and thus obtaining an original task searching flight path. The method ensures optimal property of understanding while reducing the time consuming of calculation.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Programmable radio frequency down-conversion device

The invention discloses a programmable radio frequency down-conversion device which comprises an external clock, an FPGA, a PROM, a TDM digital tuner chip, an AGC module and an external filtering module; wherein the external clock is used for providing the clock needed in the work of the FPGA, the PROM and the TDM digital tuner chip. The frequency conversion device can realize frequency down-conversion of signals with 51-858 MHz, and is internally integrated with a local oscillator and an SAW filter; an output end is processed by filtering and can output an intermediate frequency signal by difference; and an AGC compensating device and an external filter circuit are arranged outside the output; therefore, the signal performance can be greatly improved. The device has the characteristics oflow cost and high signal output performance, and has the greatest characteristic of a method of combining a special chip module and an FPGA programming device, and is added with an AGC automatic gaincontrol module and the external filtering module, thus ensuring the excellent performance of signal output.
Owner:BEIHANG UNIV

Period production method for adjusting pineapple production period

The invention discloses a period production method for adjusting the pineapple production period, and belongs to the field of plant cultivation. The method comprises the following steps of soil preparation and ridging, selection of seedlings, field planting, fertilizing management, induced flower forcing, bud removing, bud leaving and flower and fruit management. Aiming at different pineapple economic cultivation varieties, the seedlings different in planting time and specification are scientifically selected, and the influence of natural flower formation on the number of flower forcing plants can be effectively avoided or reduced; meanwhile, by reinforcing the measures such as fertilization management, induced flower forcing and flower and fruit management, spring planting in March and April in the current year is achieved; induced flower forcing is carried out in September and October of the current year, fruits are harvested in April and May of the next year, seedlings are harvested in August and September in the next year, and the seedlings can be used for autumn planting and production; or autumn planting is carried out in August and September in the current year, flower forcing is carried out in April and May in the next year, fruits are harvested in September and October of the next year, the seedlings are harvested in March and April in the year after next, and the seedlings can be used for spring planting and production.
Owner:GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI

Chinese medicinal preparation for treating vaginitis and preparation method thereof

ActiveCN102526266AThe preparation process is efficient and feasibleClear efficacyAntibacterial agentsAntimycoticsRaw materialTraditional medicine
The invention relates to a Chinese medicinal preparation for treating vaginitis and a preparation method thereof. The Chinese medicinal preparation is prepared by extracting and purifying hawthorn cores serving as a medicinal raw material according to a certain process and then mixing with pharmaceutically acceptable auxiliary materials. The Chinese medicinal preparation has the characteristics of simplicity and feasibility in preparation process, safety, effectiveness and remarkable pharmacological effect.
Owner:陕西步长高新制药有限公司

Method for determining mixing amount of asphalt mixture regenerant based on oil absorption rate of coarse aggregate

The invention relates to a method for determining the mixing amount of an asphalt mixture regenerant based on the oil absorption rate of coarse aggregate. The method mainly comprises the following steps: screening the recycled aggregate to obtain coarse aggregate in the aggregate, separately testing the apparent gross volume relative density and the apparent relative density of the coarse aggregate, calculating the absorbed asphalt content of the coarse aggregate according to the composition proportion of the coarse aggregate, and then subtracting the total old asphalt content on the basis toobtain the reference asphalt amount for determining the amount of the regenerant; then carrying out an old asphalt regeneration performance test, and preliminarily determining the amount of a regenerant; and finally, comprehensively evaluating the pavement performance of the regenerated asphalt mixture by preparing the regenerated asphalt mixture, and finally determining the amount of the regenerant. According to the method, the excellent performance of the recycled asphalt pavement can be guaranteed, and the recycling level of waste pavement materials and the driving safety of the recycled asphalt pavement are improved.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT

Chinese herbal preparation for treating vaginitis and preparation method thereof

The invention relates to a Chinese herbal preparation for treating vaginitis and a preparation method thereof. The Chinese herbal preparation for treating the vaginitis is prepared by that the hawthorn seed serves as a raw material, and the hawthorn seed and pharmaceutically-acceptable auxiliary materials are mixed after the hawthorn seed is extracted and refined according to a certain technology. The Chinese herbal preparation disclosed by the invention has a simple and feasible preparation technology and obvious pharmacology and drug efficacy action and is safe and effective.
Owner:陕西步长高新制药有限公司

Agricultural seed storage device

The invention discloses an agricultural seed storage device. The agricultural seed storage device comprises a box body, the interior of the box body is divided into a disinfection chamber and an object storage chamber through a separation plate, ultrasonic disinfection lamps are fixed to the side walls of both opposite sides inside the disinfection chamber, multiple bottle grooves are uniformly formed in the inner surface of the bottom of the object storage chamber, seed bottles are clamped to the bottle grooves, labels are attached to the surfaces of the seed bottles, bottle lids are in threaded connection with the tops of the seed bottle, the tops of the bottle lids are in a grid shape, an air pipe is communicated with the side, close to the object storage chamber, of the box body through a through hole, and a stepping air blower is communicated with the end, away from the box body, of the air pipe. The agricultural seed storage device is simple and reasonable in structural design, and convenient to operate; seeds can be disinfected and sterilized, the fine properties of the seeds is guaranteed, the environment in the box body is improved, the seeds are conveniently stored, it isavoided that the storage of the seeds is influenced and the phenomenon of mildew is caused due to humid air, the seed storage device is conveniently moved, and the labor is saved.
Owner:沈成龙

Silica gel for filling chest pad and preparation method of silica gel

The invention discloses silica gel for filling a chest pad and a preparation method of the silica gel. The silica gel comprises the following components in parts by weight: 100 parts of a base material, 3-8 parts of a crosslinking agent, 0.1 part of a catalyst and 0.02 part of an inhibitor. According to the silica gel for filling the chest pad provided by the invention, the base material comprises three different linear siloxane polymers at tail ends in synergistic effect, so that the excellence of the final performance of the product is ensured. The silica gel for filling the chest pad provided by the invention has the characteristics of good flexibility, high plasticity and no oil leakage, is low in cost and simple in preparation method, and has a very high economic value.
Owner:惠州市永卓科技有限公司

Zero-energy-consumption solar annular thermoelectric sunshade

InactiveCN110507050ARealize ventilation and coolingReduce the temperatureWalking sticksUmbrellasElectricitySurface mounting
The invention discloses a zero-energy-consumption solar annular thermoelectric sunshade, comprising an umbrella fabric (6), an umbrella slotware (7), an umbrella pole (4) and an umbrella handle, wherein the umbrella slotware (7) of the umbrella fabric (6) is arranged at an upper end of the umbrella pole (4), and the umbrella handle is arranged at a lower end of the umbrella pole (4). A thin film solar panel (1) is arranged on the umbrella fabric (6); the umbrella pole (4) is a hollow structure, a pore is formed in the upper end, and a horse throat tube (5) is sleeved on an outer ring of the pore; a semiconductor chilling plate I (21) is installed at the middle of the umbrella pole (4); a semiconductor chilling plate II (22) is installed on a lower surface of the umbrella fabric; the semiconductor chilling plate I and II are electrically connected to the thin film solar panel (1); a centrifugal exhaust fan (3) is arranged in the umbrella handle, and an air outlet of the exhaust fan (3)communicates with a lower port of the umbrella pole (4); and the exhaust fan (3) is electrically connected to the thin film solar panel (1). The zero-energy-consumption solar annular thermoelectric sunshade disclosed by the invention can create a relatively closed mobile local refrigeration environment to improve the somatosensory comfort of human body.
Owner:SHENZHEN RES INST OF WUHAN UNIVERISTY

Traditional Chinese medicament for curing cough and preparation method thereof

The invention relates to a traditional Chinese medicament for curing cough and a preparation method thereof. 100 parts of ephedra, 10 parts of fritillaria cirrhosa, 50 parts of loguat leaves, 50 parts of radix asteris, 60 parts of pericarpium papaveris, 50 parts of scutellaria baicalensis, 50 parts of liquorice and 0.3 part of menthol crystal are taken as raw materials of the traditional Chinese medicament. The traditional Chinese medicament is prepared by the raw materials after extraction for purification according to a certain process and auxiliary materials accepted by pharmaceutics. The traditional Chinese medicament for curing the cough has the advantages of being simple, practicable, safe and effective in preparation process and remarkable in pharmacodynamic effects.
Owner:陕西步长高新制药有限公司

Main rotor shaft of single rotor unmanned aerial vehicle and processing technology thereof

The invention relates to a main rotor shaft of a single rotor unmanned aerial vehicle. The main rotor shaft comprises a main shaft and an auxiliary shaft, wherein the main shaft and the auxiliary shaft are cylindrical; the main shaft comprises a shaft head, a shaft body and a shaft tail; the diameter of the shaft tail is smaller than that of the shaft body; the shaft head and the shaft tail are spline shafts; an inner hole formed along the direction of a central shaft is formed in the main shaft; the auxiliary shaft comprises a body and a connecting part and a fixing part arranged at two endsof the body; the body of the auxiliary shaft is connected to the inner hole in transition fit; the concentricity of the main shaft and the auxiliary shaft is 0.01mm; the fixing part is connected to the inner hole in the shaft tail in transition fit; nitriding layers are arranged on the surfaces of the shaft head and the shaft tail; and chromium coatings are arranged on the surface of the shaft body, the surface of the inner hole and the surface of the auxiliary shaft. The invention provides the main rotor shaft of the single rotor unmanned aerial vehicle simple in structure, high in precisionand impact resistant. Moreover, the main rotor shaft is excellent in processing technology and high in precision and meets the high standard demand.
Owner:珠海市凯菱机械科技有限公司

Method for screening high-yield strain of biological dust suppressant

The invention discloses a method for screening a high-yield strain of a biological dust suppressant, which utilizes the hemolysis characteristic in the process of producing the dust suppressant by the strain and the capability of synthesizing the dust suppressant by the strain for screening, and mainly comprises two parts of screening the high-yield strain and verifying the screened strain. The method comprises the following steps: fully diluting original strains subjected to enlarged culture, inoculating the original strains to a blood agar plate for culture, quantitatively screening the strains according to the sizes of hemolytic rings formed on the blood agar plate by the strains, carrying out fermentation culture on the strains with larger hemolytic rings, extracting the biological dust suppressant subjected to fermentation culture by an acidification precipitation method, and purifying the extracted biological dust suppressant to obtain the biological dust suppressant. And measuring the final dust suppressant yield synthesized by different strains to determine the optimal high-yield strain. Screening is carried out according to the characteristics of the strains, green and environment-friendly culture is selected, the final yield serves as the evaluation standard, the screening method has the advantages of being simple, green and environment-friendly in process and high in screening efficiency, and a new method is provided for screening of high-yield strains in the biological dust suppressant preparation process.
Owner:CHINA UNIV OF MINING & TECH

Method for preparing ordered porous TC4 alloy

The invention discloses a method for preparing an ordered porous TC4 alloy. TiH2 powder and Al-V alloy powder are mixed according to the standard ingredient proportion of the TC4 alloy, a template agent acetone solution is added, and high-energy ball milling is carried out; then vacuum hot pressing sintering is carried out, and finally the ordered porous TC4 alloy is obtained. According to the method, the template agent and the TiH2 powder, multiple ordered holes can be formed in the sintering process, holes in the alloy and the surface of the alloy can be effectively cleaned through hydrogenreleased by TiH2 in the dehydrogenation process, the good performance of the produced product is guaranteed, and the production process of the product is effectively shortened; and the pore morphologyof the titanium alloy is reasonably improved and optimized.
Owner:KUNMING UNIV OF SCI & TECH

Multi-parking-lot multi-vehicle-type vehicle path planning method

The invention relates to a multi-parking-lot multi-vehicle-type vehicle path planning method, and the method comprises the steps: obtaining vehicle information and customer information, and determining a hybrid code; according to the hybrid codes, determining an initial feasible solution, retaining iteration elite individuals, updating a pheromone matrix, and performing individual screening according to individual target values of the iteration elite individuals to form a screened elite population; based on the above conditions, improving by using a two-side successive correction algorithm to determine an improved individual, and adding the improved individual into the screened elite population until an initial population scale is reached; and carrying out crossover variation on the individuals by adopting a fixed-point crossover algorithm, selecting orthogonal experimental parameters, optimizing the calculation capability of the algorithm, and outputting an iterative optimal solution. On the basis of an initial feasible solution, an improved pheromone updating strategy and an elite population strategy are combined, a two-side successive correction algorithm is utilized for improvement, a fixed-point crossover algorithm is adopted for crossover variation of individuals, the search space is expanded, the convergence speed is increased, and the calculation performance is optimized.
Owner:WUHAN UNIV OF TECH
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