384results about How to "Good auxiliary effect" patented technology

The invention discloses a method for automatically tagging animation scenes for matching through comprehensively utilizing an overall color feature and local invariant features, which aims to improve the tagging accuracy and tagging speed of animation scenes through comprehensively utilizing overall color features and color-invariant-based local invariant features. The technical scheme is as follows: preprocessing a target image (namely, an image to be tagged), calculating an overall color similarity between the target image and images in an animation scene image library, and carrying out color feature filtering on the obtained result; after color feature filtering, extracting a matching image result and the colored scale invariant feature transform (CSIFT) feature of the target image, and calculating an overall color similarity and local color similarities between the matching image result and the CSIFT feature; fusing the overall color similarity and the local color similarities so as to obtain a final total similarity; and carrying out text processing and combination on the tagging information of the images in the matching result so as to obtain the final tagging information of the target image. By using the method provided by the invention, the matching accuracy and matching speed of an animation scene can be improved.

The invention discloses a processing method for space-occupying lesion ultrasonic images. The processing method preprocesses the acquired ultrasonic image, comprising the following steps: the removal of the text information around the image, filtration, edge enhancement, the determination of an effective information region and the like; automatic location of a lesion region; determination of the rough contour of the space-occupying lesion, and extraction of the precise contour of the lesion region with the rough contour as an initial contour for an active contour model algorithm. The processing method realizes the functions of automatically segmenting the space-occupying lesion ultrasonic image and automatically extracting the region of interest in order to automatically diagnose the space-occupying lesion, thus enhancing the objectivity and accuracy of clinical diagnosis, and therefore the processing method effectively assists the diagnosis of space-occupying lesions.

The present invention provides a vaccine adjuvant consisting of a combination of a surfactant i.e. dimethyldeoctadecylammonium-bromide / chloride (DDA) and a lipid extract from Mycobacterium bovis BCG. The total lipid extract contains both apolar lipids, polar lipids, and lipids of intermediate polarity of which the apolar lipids were found to induce the most powerful immune responses. The total lipids may be extracted with chloroform / methanol and re-dissolved in water before the addition of surfactant. This preparation may be used to induce prominent cell-mediated immune responses in a mammal in order to combat pathogens, or as a treatment for cancer.

The invention provides a vehicle braking auxiliary device based on aerodynamics. The vehicle braking auxiliary device based on aerodynamics comprises an ECU (electronic control unit), at least two link mechanisms, a fixed shaft, a front spoiler, a rear spoiler, at least two step motors, at least three hydraulic cylinders, a vehicular speed sensor, a turning angle sensor, at least two position sensors and at least three pressure sensors. The vehicular speed sensor, the turning angle sensor, the position sensors and the pressure sensors are all connected with an input end of the ECU, each step motor and each hydraulic cylinder are connected with an output end of the ECU, one end of each link mechanism is correspondingly connected with an output shaft of one of the step motors while the other end of each link mechanism is in transmission connection with the rear side of the front spoiler, the front spoiler is capable of rotating around the fixed shaft which is arranged on the front side of the front spoiler, and a piston rod of each hydraulic cylinder is connected with the rear spoiler. The vehicle braking auxiliary device based on aerodynamics is capable of instantly reducing vehicular speed to some extent and increasing ground adhesion of a vehicle to enable the vehicle to keep stable in high-speed emergency braking, braking distance can be shortened, and safety is improved.

The invention discloses an auxiliary light-weight integrated multi-freedom-degree lower limb exoskeleton and relates to the field of bionic wearable exoskeleton robots. The auxiliary light-weight integrated multi-freedom-degree lower limb exoskeleton comprises a back mounting board, a waist connection part, a hip bionic structure, a hip joint, a thigh bionic structure, a knee joint, a crus bionic structure, an ankle joint and a foot bionic structure; the ankle joint is arranged at the edge of the upper surface of the foot bionic structure; the crus bionic structure is fixedly connected with the foot bionic structure; the thigh bionic structure is installed on the knee joint at the top of the crus bionic structure; the hip joint is fixedly installed at the upper end of the thigh bionic structure; the hip bionic structure is fixedly installed at the upper end of the hip joint; the waist connection part is fixedly connected with the hip bionic structure; and the back mounting board is vertically and fixedly connected with the waist connection part. Through integration of freedom of degrees of all joints, an active joint drive structure is added, the light-weight structure form enhances the man-machine safety and wearing comfort under the condition of meeting the load requirements, and the auxiliary effect of the exoskeleton is improved.

The invention relates to a method for decoding coding mark points of a measuring stick based on skeleton extraction. The method comprises the following steps: segmenting an image by an self-adaptive threshold method and extracting foreground regions which comprise non-coding mark point regions; eliminating a noise region by utilizing the area of each foreground region to acquire a region to be extracted; performing local sub-pixel edge extraction on the region to be extracted in the original image and then positioning an oval outline; fitting an oval by oval outline points, extracting a coding mark point region and intercepting an image of the coding mark point region; performing inverse affine on the oval in the image to enable the oval to become a circle, so as to acquire a image to be decoded; performing partial differential processing and extracting the skeleton of a coding ring region; decoding the coding mark points and performing rotate right on 10 binary codes, wherein the minimal decimal value is the coding mark point decoding value; performing one-to-one correspondence on determined feature point codes on the measuring stick of left and right images, namely matching point pair. The method has the advantages that the defect that three-dimensional matching calculation is complex in the traditional algorithm is overcome, the matching precision is improved, and the important application value is achieved in the field of binocular vision three-dimensional measurement.

The invention relates to a wireless sensor network node positioning method based on time reversal, comprising the steps of: 1, sending a request impact signal to a reference node by an unknown node and recording initial time; 2, receiving and reversing by the reference node and sending a reversal multi-path request impact signal to the unknown node; 3, receiving a focusing-arrived reversal multi-path request impact signal by the unknown node and recording receiving time at the moment; 4, calculating the distance away from the reference node by the unknown node according to the initial time and the receiving time; 5, repeating the step 1 to the step 4 until the distances from the unknown node to any three reference nodes are calculated; and 6, calculating coordinates of the unknown node according to the distances from the unknown node to any three reference nodes to complete the positioning of the unknown node. The invention has the benefits of solving the problem of large traditional TOA (Time Of Arrival) positioning errors under a complex environment and ensuring that the system positioning error is less than the working wavelength.

The present invention discloses an anti-sagging spraying primer coat, which comprises, by weight, 10-25% of a two functionality aliphatic polyurethane acrylate, 20-30% of a modified epoxy acrylate, 10-20% of a polyester acrylate, 10-15% of a monomer, 25-30% of a filler, 3-5% of a photoinitiator, 0.5-2% of an anti-sagging additive, 0.2-0.5% of an anti-foaming agent, and 0.1-0.3% of a leveling agent. With application of the UV paint as the spraying primer coat, the problem of sagging during a coating process can be avoided, the whole coating efficiency can be improved, the environment-friendly characteristic is provided, and the organic solvent emission can be reduced.

The invention belongs to the technical field of power system line fault judgment, and particularly relates to a line fault judgment method based on wavelet analysis and a support vector machine. The method comprises steps: firstly, fault current signals in a wave recording system are extracted, and the wavelet analysis technology is adopted for extracting and analyzing feature information of the fault current signals; then, a wavelet energy entropy theory is used for decomposing the fault current signals, an energy entropy value corresponding to each phase of current is calculated, and zero-sequence current is combined for building a four-dimensional feature vector for transmission line fault classification; and finally, a two-layer classification model is used for specific fault judgment. The judgment method comprises a linear classification module and a nonlinear classification module, wherein linear classification is initial classification on data samples according to the two-layer classification structure of the zero-sequence current and threshold parameters; and on the basis, according to data features for transmission line small sample fault, the support vector machine is used for nonlinear classification on multiple kinds of fault data, and transmission line fault judgment is finally realized.

The invention discloses an audio scene recognition method based on acoustic events, which comprises the steps as follows: Step I, conducting audio division on an audio stream to be subjected to audio scene recognition, Step II, classifying audio frames included in audio scene segments with an acoustic event model and obtaining a probability relationship among the audio frames and acoustic event classes, Step III, obtaining a probability relationship among the audio scene segments and the acoustic event classes according to the information of all the audio frames included in the audio scene segments, and Step IV, determining main acoustic events included in the audio scene segments and determining semantic scenes of the audio scene segments. The method judges the main acoustic events more reasonably and accurately, so that the recognition accuracy rate of the semantic scenes can be increased, and the method is good in generalization performance, provides good assistance to the video scene recognition, and increases the accuracy rate of the video scene recognition.

The invention relates to a manufacturing method of bamboo fiber and particularly relates to a method for directly producing raw bamboo fiber from raw bamboos. The method sequentially comprises the following steps of: selecting materials, flattening, softening, opening, performing steam boiling, acid cleaning, dipping flame-retardant treatment and bamboo vinegar treatment and drying, wherein the softening adopts microwave softening, the bamboo material after flattening is soaked in softening liquor, then the bamboo material dipped with the softening liquor is sent into a microwave vacuum tank, and microwave softening treatment is further performed; the dipping flame-retardant treatment adopts vacuum pressurization flame-retardant treatment, during the treatment process, bamboo filament-like fiber obtained after opening is firstly arranged into a vacuum pressurization tank, vacuum-pumping operation is performed to enable the vacuum degree to be minus 0.015MPa-minus 0.025MPa, and then a flame retardant is added into the tank to increase the pressure in the tank to be 0.1MPa-0.8MPa; and the bamboo vinegar treatment comprises primary bamboo vinegar treatment and secondary bamboo vinegar treatment. The manufacturing method disclosed by the invention has the advantages of simplicity and convenience in production and short treatment time, and the produced bamboo fiber has a flame-retardant effect.

The invention relates to a percutaneous aortic valve replacement surgery conveying device with valve positioning function, which is characterized by comprising a conveying rod (1), a sheath pipe (5), a circular ring (3), positioning rods (2) and circular ring control cables (4), wherein the circular ring (3) is sheathed on the lower end of the percutaneous aortic valve replacement surgery conveying rod (1) and located in the conveying sheath pipe (5); the quantity of the positioning rods (2) is at least two, and one end of each positioning rod (2) is hinged with the conveying rod (1); and the quantity of the circular ring control cables (4) is at least two, the lower end of each circular ring control cable (4) is provided with a structure for supporting the circular ring (3), and the upper end of each circular ring control cable (4) stretches out of the human body along the axial direction of the conveying rod (1). The conveying device can play good auxiliary function on positioning the transplanted valve, increase the success rate of percutaneous aortic valve replacement surgery and reduce surgery difficulty and postoperative complications; the conveying device can also reduce surgery pain and risk for patients and decreases medical expenses.

The invention provides a statistical evaluation method for intermediate data of paroxysmal conditions of children's absence epilepsy. The method employs easy wearable electroencephalogram electrodes and wristbands that are easy to be accepted by children because the electroencephalogram electrodes and the wristbands are of concealment and are convenient to be worn by the children. In the method, not only the electroencephalogram is used for analyzing the paroxysm of the epilepsy, but also wireless motion nodes are introduced in combination with the children's features to more precisely detect the paroxysmal process and the paroxysmal number. Without affecting the children's daily activities or hurting the children patient, the system is suitable to be worn at home and applicable to a long-term measurement. The objectivity is better when wearing the system for a longer period. By this method, the daily paroxysmal information of the children patient can be statistically accumulated, thereby providing an auxiliary basis for the family members to understand the illness condition as well as for the doctors to further understand the illness condition, due to the fact that whether the statistic of the paroxysmal number is accurate also provides a great reference to the therapeutic process of the children patient.

The invention provides a storage box recognition and positioning method based on contour features. The method comprises the following steps: (1) collecting a color image and a depth image of box goods; (2) performing foreground segmentation on the color image and the depth image, mapping depth blocks to the color image, marking color region blocks falling into the same depth block, and combining the color region blocks to serve as a final box cargo foreground image; (3) performing linear edge detection on the foreground image of the box cargo, and connecting edges by taking a rectangle as an outline target to obtain a candidate target closed outline; (4) selecting the target meeting the predetermined box body rectangular characteristics from the candidate target closed contours to obtain abox body identification result. The method performs identification and positioning of the box goods based on the depth image and the color image, improves the calculation efficiency, has the advantages of low cost and high real-time performance, and is suitable for identification and positioning of the box goods in complex environments such as factory warehouses.

The invention provides a stirring device in a rolling production line. By adopting the stirring device, the technical problems of a high-speed stirring machine in current complete equipment that the structure is too simple; materials cannot be fully mixed; the stirring effect is poor; and the like are solved. According to the stirring device in the rolling production line, the rolling production line comprises a rack; the stirring device comprises a stirring bucket with an opening at the upper part; the stirring bucked is fixed on the rack; the bottom of the stirring bucket is provided with an output opening; a separation plate which can divide the stirring bucket into an upper stirring part and a lower stirring part is arranged in the stirring bucket; the separation plate is provided with a connection pipe which communicates the upper stirring part with the lower stirring part; a solenoid valve is arranged in the connection pipe; the separation plate is further connected with a lifting mechanism which can drive the separation plate to lift vertically; and the rack is provided with a material conveying mechanism I which can convey solid materials to the upper stirring part and a material conveying mechanism II which conveys liquid materials. The stirring device has the advantage that the stirring effect is good.

The invention discloses a locating model generation method, a method for performing skeleton locating on a spinal sagittal image, and a computing device used for executing the methods. The locating model generation method comprises the steps of obtaining the tagged spinal sagittal image to serve as a training image, wherein the training image has corresponding tagged data; inputting the training sample to a pre-trained locating model for performing processing, wherein the locating model comprises a convolution processing layer, a classification processing layer and a regression processing layer, the convolution processing layer performs convolution, activation and pooling processing on the input image to output at least one located skeleton, and the classification processing layer and theregression processing layer perform classification processing and regression processing on the located skeleton respectively to output a probability of predicting that the skeleton belongs to sacrum and a predicted position of the skeleton; and according to the tagged data, performing model training on the pre-trained locating model to obtain a trained locating model.

The invention discloses a mold for inflating, filling and forming of a full-dry optical-cable loose tube. The mold comprises a plastic extruding mold, a fiber guide tube, an inflating support and an air source mechanism, wherein the inflating support sleeves the fiber guide tube so as to form a sealed cavity, and air guide holes and an air inlet are dissymmetrically formed in the fiber guide tube and the inflating support; filtration and graded depressurization are performed twice on compressed air when the compressed air sequentially passes through a filter device and a pressure regulating device, the depressurized air enters the fiber guide tube through the air guide holes, the air, water blocking yarn and optical fibers are uniformly and stably injected in a formed loose tube through the fiber guide tube so as to form a full-dry optical-fiber loose tube through plastic extruding. The mold disclosed by the invention is simple in structure, the after shrinkage of the loose tube is small, and the fiber excess length is stable and controllable.

The invention discloses a pressurizing device used for mounting a mounting complex curved surface heater of a spacecraft. The pressurizing device comprises a bridge type support, an adsorbing module, a sliding block, a ball-headed pin, a pressure plate, a flexible forming block and a butterfly adjusting bolt, wherein a long hole is formed in the center at the upper part of the bridge type support, strip-shaped through holes are formed in the two ends of the bridge type support, the two ends of the bridge type support are tightly compressed and connected onto the adsorbing module through a sucker screw and a big nut, the butterfly adjusting bolt penetrates through the sliding block, the long hole above the bridge type support, and the ball-headed pin in sequence, and is in screwed connection to a threaded hole in the center of the pressure plate, the flexible forming block is arranged at the bottom of the pressure plate, the sliding block can slide in the lengthwise direction of the bridge type support, and is fixed through the butterfly adjusting bolt, and the butterfly adjusting bolt is used for adjusting screwed thread turns to control pressing force. The pressurizing device provided by the invention solves the problem that pressuring on a large vertical curved surface in the horizontal direction can not be performed, the dismounting of the device is simple and easy, the use is flexible, the adjustability is high, and for irregular regions, the pressurizing device plays an excellent assisting effect on mounting the heater in an operation limited position.

The invention provides a grid voltage monitoring and prediction system and method based on a geographic information system and belongs to the field of grid voltage monitoring technologies. The system comprises a basic information setting module, a map service module and a voltage monitoring and prediction module. The method includes the steps that monitoring data are preprocessed according to historical voltage data of a monitored object and current voltage monitor running status parameters; a voltage prediction model is established; according to the voltage prediction model, the voltage change trend of a monitoring point within future requested time is predicted, if the prediction result exceeds the upper limit range and the lower limit range of voltage of the monitoring point, an alarm prompt is displayed at the position, on a map view, of the monitoring point, and the alarm prompt is also displayed at a corresponding position of a thematic layer where a monitoring point administrative department to which the monitoring point belongs is located. Mapping of grid voltage monitoring and visualization of operating data are achieved, effective early warning is provided for grid voltage abnormities, and grid equipment can be conveniently adjusted, overhauled and scheduled before the abnormities occur.

The invention relates to a region-of-interest classification method and device, computer equipment and a storage medium. The method comprises the following steps of: acquiring a to-be-classified cardiac coronary artery image; inputting the cardiac coronary artery image into an image segmentation model to obtain a segmented image of the coronary artery in the cardiac coronary artery image; determining a region of interest in the coronary artery based on the segmented image of the coronary artery; and for a region image corresponding to the region of interest, determining a classification resultof the region of interest; wherein the classification result is used for representing the focus type and severity of the region of interest. Because the computer equipment can display the marking result and the classification result of the region of interest to a doctor for checking, the corresponding medical image is displayed, so that a better auxiliary effect can be provided in the diagnosis process of the doctor; and the classification result represents the focus type and severity of the region of interest, so that more effective focus information can be provided when a doctor is assisted, and the doctor can give a more accurate diagnosis result.

The invention discloses an assembly system based on visual guidance, and belongs to the technical field of machine vision and image analysis. The assembly system comprises two video signal collectingunits, a control unit and a display unit; the two video signal collecting units are used for correspondingly collecting video information of current to-be-mounted parts and an assembly body and sending the video information to the control unit; the control unit conducts intelligent image algorithm treatment on the received video information to obtain the numbers of the current to-be-mounted partsand current assembly order information of the current to-be-mounted parts on the assembly body, and judges whether the current to-be-mounted parts are parts needed by the current assembly order; and the display unit is used for converting received information of mounting positions of the parts on the assembly body or correct number information of the to-be-mounted parts into image information to be displayed. According to the assembly system, the manual error phenomenon in the assembly process can be solved, the assembly difficulty is lowered, and the efficiency is improved.

The invention discloses environment-friendly printing wastewater treatment equipment. The equipment comprises a treatment tank, a collecting box, a first cleaning scraper blade, a second cleaning scraper blade and a cleaning scraper blade auxiliary mechanism, by arranging the first cleaning scraper blade and a collecting box, flocculent impurities on the surface of the wastewater in the treatmenttank can be well removed, and can be well collected for centralized treatment, so that waste of wastewater material resources is avoided, and the working efficiency of wastewater treatment is improved; in the process, an intercepting filter screen is driven by a telescopic rod to move upwards, the flocculent impurities in the wastewater can be separated out to the maximum extent, then the workingquality of a wastewater pool is guaranteed, the working economic benefits are guaranteed, a good auxiliary effect is achieved on the first cleaning scraper blade for scraping the flocculent impuritieson the intercepting filter screen, one-time cleaning is more sufficient, therefore, workload is reduced, and working efficiency is improved.

The invention relates to yin-nourishing and yang-tonifying health-care wine and a preparation method thereof. The health-care wine comprises Chinese caterpillar fungus, red lucid ganoderma, Chinese angelica, medlar, emblic leafflower fruit, var. albescens DC. seed and stevia rebaudiana serving as active ingredients. The preparation method comprises the following steps of: heating each medicine tothe temperature of between 50 and 70 DEG C by using 60-degree corn wine in a weight ratio of 1:20, keeping for 3 to 5 hours, soaking at normal temperature for 10 to 15 days in a sealed mode, filtering a soak solution to obtain Chinese caterpillar fungus wine, red lucid ganoderma wine, Chinese angelica wine, medlar wine, emblic leafflower fruit wine, var. albescens DC. seed wine and stevia rebaudiana wine respectively, and mixing to obtain raw yin-nourishing and yang-tonifying health-care wine; and blending the raw yin-nourishing and yang-tonifying health-care wine with distilled water to obtain finished yin-nourishing and yang-tonifying health-care wine with the alcohol content of 35 to 45 degrees. 20 to 50ml of wine is generally drunk before sleep every day, and the effects of nourishingyin, tonifying yang and supplementing proteins, various vitamins, trace elements and amino acids which are necessary to human bodies can be achieved; and the wine has a good auxiliary effect of normally secreting male and female sex hormones and a sleep promoting effect.

The invention is applied to the technical field of fault detection, and provides a power equipment fault diagnosis method and device, and terminal equipment. The power equipment fault diagnosis methodcomprises the following steps: obtaining initial fault information of the power equipment sent by the terminal equipment, and searching for a corresponding initial predicted diagnosis result in a pre-stored fault information database according to the initial fault information; judging whether the initial predicted diagnosis result satisfies a first preset rule or not; and if the initial predicteddiagnosis result satisfies the first preset rule, obtaining fault detection prompt information according to the initial predicted diagnosis result, obtaining fault detection supplemental informationsent by the terminal equipment, and determining the final fault diagnosis result of the power equipment according to the fault detection supplemental information and the initial fault information. According to the invention, through inputting the initial fault information, the diagnosis result can be obtained automatically, and the efficiency of fault diagnosis can be improved; meanwhile, the first preset rule is used for screening the initial predicted diagnosis result, which improves the accuracy of the fault diagnosis method, and avoid the phenomenon that too many diagnosis results are obtained and the maintenance idea of the maintenance personnel is disturbed.

The invention discloses a half-track type fire-fighting robot. The half-track type fire-fighting robot comprises a vehicle body, track driving wheels and tracks, wherein the track driving wheels are positioned at four corners of the bottom of the vehicle body; the tracks are positioned on two sides of the bottom of the vehicle body; the tracks are wound on the track driving wheels; the vehicle body is internally provided with a storage cavity and a water tank; the water tank is positioned on one side of the storage cavity; the upper part of the vehicle body is provided with a rotating shaft; and the rotating shaft is provided with a supporting pillar. According to the half-track type fire-fighting robot disclosed by the invention, by arranging a cylinder, boosting pumps and an electric telescopic rod, the height of the cylinder is favorably adjusted, the water injection rate of the half-track type fire-fighting robot is increased, and water pressure is enhanced for benefiting fire fighting; obstacle clearing blades, an electric cylinder and a motor are arranged for effectively and favorably clearing road obstacles by using the half-track type fire-fighting robot; a remote control car, fire suppression bottles and a remote control camera are arranged for well assisting firefighters and are convenient for the firefighters to extinguish fire; and the half-track type fire-fightingrobot is suitable for being widely popularized and used.

The invention discloses a user cluster analysis method in a customer care system. The method is characterized by establishing a systematic structure based on the customer care system, an application procedure of data mining and a brand-new algorithm. The method can overcome the defects in user clustering methods of current customer care systems, is scientific and proper, has high accuracy and strong universality, excellent effects, simplicity and reliability.

The invention discloses a preparation process for a corn kwas health care beverage through fermentation of coarse cereals mainly comprising corn flour with microzyme, Lactobacillus bulgaricus, Lactobacillus acidophilus and Bifidobacterium in a certain ratio, and the corn kwas fermented beverage prepared by using the method. The corn kwas fermented beverage is prepared by subjecting raw materials to liquefaction, saccharification, sterilization and artificial inoculation of a composite starter, then carrying out fermentation at a preferential temperature under anoxic conditions and then carrying out blending and high temperature instant sterilization after fermentation. According to the invention, inherent nutrient components and flavor of corn are maintained, other cereals are cooperatively used, then fermentation is carried out, so the corn kwas fermented beverage has abundant nutrients, unique and agreeable sour-sweet taste, pure fragrance, natural fermentation flavor and long shelf-life, does not contain chemically synthesized essence and pigment and is stable. It is discovered by accident that the manner of anoxic fermentation at a high temperature at first and at a low temperature next enables the prepared beverage to have more unique, softer and mellower flavor. A novel approach and novel technology are provided for processing and utilization of corn; and the variety of fermented beverages is enriched.

The invention relates to a process for extracting curcumin through an ultrasonic-aqueous two-phase synergy. The process comprises the following steps of pulverizing curcuma, degreasing, carrying out ultrasonic extraction on curcumin with 75% ethanol to obtain an extract, adding an aqueous solution of ammonium sulfate into the extract, uniformly stirring, standing until an alcohol phase is separated from an aqueous phase in a balanced way, separating the alcohol phase, drying the alcohol phase at 45-50 DEG C to constant weight, dissolving the dried product in 75% ethanol to obtain a solution, enabling the solution to pass through macroporous resin, eluting with 75% ethanol, collecting and drying to obtain preliminarily purified curcumin. According to the process disclosed by the invention, by combining the ultrasonic extraction technology and aqueous two-phase extraction technology and adopting the extraction principle that effective substances are fully dissolved in an organic solvent, the extraction rate is greatly increased, on the basis that respective advantages of the ultrasonic extraction technology and the aqueous two-phase extraction technology are given into a play, the mutual synergistic effect of the ultrasonic extraction technology and the aqueous two-phase extraction technology is achieved and thus the extraction rate of curcumin reaches 18%.

The invention provides an indoor positioning navigation method and system for visually impaired people. A user terminal executes the following steps: receiving of environment data: the environment data collected by an environment detecting unit is received; sending of a two-dimensional layout map request: the request for giving the two-dimensional layout map of a building is sent to a server; positioning: a current position of a user is calculated based on the two-dimensional layout map in combination with movement data of the user; navigation: an optimal route is calculated with a route planning algorithm in combination with the current position and the destination of the user, voice navigation is performed for the user, and during voice navigation, when the environment detecting unit detects an obstacle, obstacle data information sent by the environment detecting unit is received, and voice prompts the user to bypass the obstacle. The indoor positioning navigation method and system have the beneficial effects of being suitable for all kinds of user groups, particularly have a quite good assisting effect on the visually impaired population, and is worth applying and popularizing.