33results about How to "Improve the success rate of extraction" patented technology

The invention relates to a PRI interval information-based radar signal sorting method and system, and belongs to the field of radar signal processing; the method comprises the steps: carrying out the multi-stage difference calculation of an arrival time sequence of a mixed overlapping radar pulse flow, and generating a difference sequence; determining a neighborhood radius and a density threshold value of a density clustering algorithm according to distribution characteristics of the difference value sequence; according to the neighborhood radius and the density threshold value, performing density clustering on the difference value sequence by using a density clustering algorithm to obtain a plurality of clustered clusters; calculating the extraction priority of each cluster, and generating PRI interval information to be extracted for the cluster with the highest priority; extracting a radar pulse signal corresponding to the PRI interval information to be extracted by adopting an improved pulse sequence search method, wherein the improved pulse sequence search method is a pulse sequence search method with tolerance control. According to the method, the PRI estimation precision and the information dimension can be improved, so that the sorting success rate of the radar pulse signals is improved.

The invention discloses an extraction method of adipose-derived stem cells. The extraction method comprises the following steps: acquiring adipose tissues, treating the adipose tissues with a surfactant, treating the adipose tissues with an adipose tissue protectant, performing inoculated culturing and the like. The used surfactant comprises the following components in parts by weight: 0.3 part ofhydroxyethyl starch 550, 1 part of lecithin. 0.1 part of polysorbate and 98.6 parts of a PBS solution. The used adipose tissue protectant comprises the following components in parts by weight: 0.2 part of trehalose, 0.05 part of reduced glutathione, 2 parts of human albumin, 1 part of histidine, 0.025 part of sorbic acid, 0.5 part of VC, and 96.2 parts of a carbohydrate and electrolyte injection.The extraction method can effectively solve the problems that in the extraction process of the adipose-derived stem cells, due to the existence of fat droplets, the cell attachment rate is low and the cell extraction rate is low.

The invention discloses a digestive tract foreign matter taking-out device, which comprises a stretching-in pipe. A spline shaft is arranged in an inner cavity of the stretching-in pipe, a mounting plate is fixedly connected to the bottom of the spline shaft, an annular tooth rack is fixedly connected to the bottom of the mounting plate, and a clamping mechanism is movably connected to the position, opposite to the annular tooth rack, of the outer wall of the stretching-in pipe. The three sets of clamping mechanisms are evenly distributed at the bottom of the stretching-in pipe, and each clamping mechanism comprises a mounting frame. Due to the synchronous outward expansion effect of the four sets of arc-shaped plates, the inner wall of the opening air bag is opened and deforms, so that the opening air bag supports the peripheral inner wall of the digestive tract clamped by foreign matter in the digestive tract of a patient, the inner wall of the digestive tract is opened through the opening air bag, the extending height of the extending pipe is limited, and the stability of the extending pipe is improved, and the phenomenon of secondary injury caused by instability when the foreign matter is clamped due to the fact that the stretching-in tube continues to deviate after stretching into the digestive tract is prevented.

The invention discloses a combined-type flexible ureteroscope sheath part capable of conducting continuous lavaging and sucking. The combined-type flexible ureteroscope sheath part solves the problemthat blood clots and broken calculi in the kidney cannot be effectively discharged in ureteroscopic lithotripsy. A continuous lavaging system formed by an inner sheath canal and an outer sheath body has the advantage of efficiently removing the calculi, the operation success rate for the first time is increased so that the ureteroscopic lithotripsy can process the renal calculi of 2 cm or above, and the operation indication is expanded. According to the technical scheme, the combined-type flexible ureteroscope sheath part comprises the outer sheath body, the inner sheath pipe is detachably andcombinedly arranged in the outer sheath body, and the working end of the inner sheath pipe stretches out of the working end of the outer sheath body for a certain length; a negative pressure suctionopening is formed in the non-working end of the outer sheath body; the outer sheath part and the inner sheath pipe form the continuous lavaging system of which the inner sheath pipe conducts continuous lavaging inwards and the outer sheath body conducts continuous negative pressure suction, and foreign matter in the ureteroscopic lithotripsy is taken out.

The invention relates to the technical field of medical apparatus and instruments, and in particular relates to a syringe needle which is characterized in that the inner wall of the syringe needle is of a concave-convex rough surface structure. The syringe needle has the beneficial effects that the structure of the inner wall of the syringe needle is changed, under B-ultrasonic localization, a needle part of a puncture needle enters the lump part, and the concave-convex rough surface structure of the inner wall of the needle part enables the needle part to have lateral shear force in the rotation process through multi-direction lifting and inserting; in the withdrawing of the needle, the residual rate of the sucked cells on the inner wall of the needle part can be improved, so that enough lesion cells can be sucked, and even more the lesion cells are divided from the root and completely sucked; an operator does not need to pull a needle pintle by hand continuously, and the negative pressure inside a needle tube can be effectively controlled under the coordinated positioning of a baffle and a gap, so that the sucking success rate can be improved, a satisfactory smear is prepared, and the lesion nature is judged.

The invention relates to a thrombus extraction stent, a thrombus extraction device and a thrombus extraction system. The thrombus extraction stent comprises rigid units and flexible units which are alternately connected. Each rigid unit and each flexible unit are of a tubular structure which can be compressed and expanded in the radial direction. When the same axial force is applied, the flexibleunits are easier to axially compress compared with the rigid units. When the flexible units are axially compressed, the radial sizes of the flexible units are synchronously increased; and the maximumradial size of the axially compressed flexible units can be greater than the radial size of the rigid units. The rigid units are used for supporting, a blood flow channel can be rapidly established when the stent is unfolded, and the pre-dredging function is achieved. When the flexible units are compressed in the axial direction, interval spaces surrounding the rigid units can be formed between the adjacent flexible units, thrombus located in the interval spaces are not cut by the thrombus extraction stent, the integrity of the thrombus is kept, the risk of thrombus disengagement is reduced inthe withdrawing process, the thrombus taking-out success rate is increased, and the thrombus capturing capacity is further improved.

The invention discloses an NLP-based domain model extraction method for airborne display control system requirements. The method comprises the steps of S1, preprocessing an input requirement text; S2,analyzing and extracting a dependency relationship and a co-exponential analysis relationship in the requirement text; S3, according to a set composed of verb phrases and noun phrases, a dependency item analysis result and a co-reference analysis result, improving the dependency relationship of words to semantic unit dependency, and triggering rules to construct a domain model; and S4, visualizing the domain model constructed in the step S3. Domain model extraction is performed on airborne display and control system requirements according to existing model extraction rules,, the effectivenessof the rules in the aspect of airborne display and control system requirement domain model extraction is demonstrated through experiments, and the method has the advantages of being high in correlation, good in application prospect and the like.

The invention discloses a manhole cover replacing machine. The machine is used for replacing an inspection manhole cover in a road surface and comprises a machine frame; the machine frame comprises two or more hollow upright columns, wherein a movable mounting platform is arranged between the upright columns, a cutter head assembly for rotationally cutting the operation surface is arranged right below the mounting platform, and a bursting and clamping mechanism for bursting a manhole body masonry material and clamping a manhole seat is arranged right below the cutter head assembly; and a firstdriving mechanism for enabling the mounting platform to reciprocate in a vertical direction is arranged at the top end of any upright column, and a second driving mechanism for enabling the cutter head assembly to rotate along a central axis is arranged on the mounting platform. According to the manhole cover replacing machine, the milling and planing of the road surface, the lifting and pullingof the manhole seat and the loading of the manhole cover can be completed at one time, and the problems of insufficient power and rigidity and the like of existing equipment during the operation on the cement road surface with hard texture are solved.

The invention discloses a food container, a liner thereof and an automatic kitchen system. The liner comprises a liner bottom plate, a liner flange, liner connectors and liner internal extension parts, the liner flange is annularly arranged, and the liner flange and the liner bottom plate are arranged at interval in the vertical direction of the main surface of the liner bottom plate; the liner connectors are used for connecting the liner bottom plate and the liner flange; the liner internal extension parts are connected with the liner flange and extend into the liner flange, and the extensionlength of the liner internal extension parts allows a liner lifting mechanism to act on the liner internal extension parts from the inner side of the liner flange so as to lift the liner. The liner has the advantages that the liner can be lifted by the liner lifting mechanism, the container used in food processing is allowed to be multipurpose, and food processing equipment function perfection isachieved.

The invention proposes a minimally invasive bone marrow biopsy sampling needle. The sampling needle comprises a needle tube, first and second needle cores, wherein the tail of the needle tube is provided with a main handle, the tails of the first and second needle cores are provided with auxiliary handles, the front end of the first needle core is provided with a triangular pyramid head, the center of the first needle core is provided with a first channel opened to the tail end surface of the first needle core, three pyramidal faces of the triangular pyramid head are provided with connecting channels communicating with the first channel, the center of the second needle core is provided with a second channel opened to the opposite side, the inner cylindrical wall at a terminal end positionof the front end of the second needle core is provided with a separation cone, a cone tip of the separation cone faces the center of the second needle core, and the separation cone is a triangular pyramid. The sampling needle has the advantages that bone marrow smear examination and bone marrow biopsy can be simultaneously carried out in one puncture, the use is reliable, pains of a patient can beeffectively reduced, and a success rate of bone marrow extraction is high.

The invention discloses improvement and application of an oral cavity swab sample preservation solution. The oral cavity swab sample preservation solution comprises 5-20mM of Tris, 10-50mM of EDTA, 0.1-0.5M of NaCl, 0.1-.05% of SDS and 0.1-2% of sodium hydroxymethylglycinate. The oral cavity swab sample preservation solution also comprises food preservatives nationally licensed to be used. The preservation temperature of the oral cavity swab sample preservation solution is about 37 DEG C, reagents used in a formula of the preservation solution are cheap and fine, and DNA detection rate and stability are improved, so that detection cost is reduced; the formula and production steps are simple and convenient, and the used reagents are good in stability, so that long-term storage of a productcan be facilitated; and the preservation solution adopts common preservatives in foods and daily necessities for inhibiting damage of bacteria on an oral cavity swab sample, the preservatives fully pass through related verification, use security is high, ingredients of the prepared oral cavity swab sample preservation solution can be compatible with a subsequent DNA extraction program, and subsequent DNA extraction is beneficial.

The invention relates to the technical field of medical biology, in particular to a kit for extracting DNA from a human feces sample and an extraction method. The kit comprises a sample preservation solution, a cell lysis solution, a DNA precipitant, a DNA detergent, a DNA extracting solution and a DNA eluent, the sample preserving solution comprises the following components: a trihydroxymethyl aminomethane hydrochloric acid buffer, sodium chloride, ammonium sulfate and ethylenediamine tetraacetic acid, the cell lysis solution comprises the following components: guanidinium isothiocyanate, a chelating agent, dithiothreitol, TritonX-100 and a pH regulator; and the DNA extracting solution comprises guanidine hydrochloride. When the extracting solution is used for extracting DNA from an fecessample, the situation that a DNA adsorption column is blocked in the extracting process is not likely to happen, and the extracting success rate is high. By adopting the extraction method disclosed by the invention, the concentration and purity of the DNA sample solution can be greatly improved, and the extracted DNA sample solution can be well used for methylation detection.

The invention relates to the technical field of mechanical equipment, in particular to a dismantling device of an annular component in a stepped hole. The dismantling device comprises a screw rod, wherein the screw rod sequentially penetrates through an arm-brace fixing disc, a braced pressing seat, a support housing and a locking nut from top to bottom; a plurality of arm-braces are arranged on the circumference of the arm-brace fixing disc and are rotatably connected with the arm-brace fixing disc; the braced pressing seat comprises a movable groove enabling the top ends of the arm-braces tomove towards the screw rod; and a boss is arranged at the bottom end, back on to the screw rod, of each of the arm-braces. The dismantling device is convenient to dismantle and increases the reuse rate of the component in the stepped hole.

The invention discloses a rapid and low-cost method for separating a PCR template from chicken blood. The rapid and low-cost method for separating the PCR template from the chicken blood comprises thesteps that A, blood corpuscle nucleuses are separated from a blood sample, specifically, a fresh and frozen anticoagulant chicken blood sample is added into a 1.5 mL EP pipe, and 4000rpm centrifugation is carried out for one minute and supernatant is removed; and 500 [mu]l sterile water is added into the pipe to stand for one minute, 9500rpm centrifugation is carried out for three minutes, and the supernatant is abandoned; B, the corpuscle nucleuse dissociation is carried out, specifically, a 3-4% chelated type ion exchange resin solution shaken up by the 200 [mu]l sterile water is added intosediment by using a spearhead with the cut tip part, after mixing, water bath at 55 DEG C-57 DEG C is carried out for 30 minutes, then, a dry heat meter is placed in, and heating is carried out at 100 DEG C for 8 minutes; and C, PCR template separation is carried out, specifically, 9500rpm centrifugation is carried out for two minutes, and the supernatant is taken as a PCR template. Compared witha template obtained by using an existing traditional DNA extraction method, the PCR template obtained by using the rapid and low-cost method for separating the PCR template from the chicken blood hassame effects for PCR technology detecting, the operation is simpler and easier to operate, the time-consuming is short (within one hour), the cost is low (about 0.31 yuan/sample), and the PCR template is suitable for various rapid DNA molecular detection experiments carried out by using PCR technology.

The invention discloses a web page element searching method and device, and computing equipment. The web page element searching method comprises the following steps: in response to a request of a user for searching web page elements on a Chrome browser, sending a domain name and a URL of a current site to a server side, and then obtaining a template returned by the server side, wherein a target field and an extraction rule of the target field are recorded in the template; when the extraction rule of the target field is absolute positioning, extracting the target field in the current page by using one of an Xpath selector, a CSS selector and an ID selector; when the extraction rule of the target field is relative positioning, extracting a target container in the current page, and extracting the target field in the target container; and taking the extracted target field as a search result of the web page element. The invention also discloses corresponding computing equipment and device.

The invention discloses a handwriting track extraction method and device based on image frames, a storage medium and equipment. The method comprises the following steps: acquiring image data of continuous frames acquired by an image acquisition device arranged in an intelligent pen based on handwriting motion; determining a relative displacement between any two adjacent frames of images according to the image data to obtain a plurality of adjacent frame displacements; obtaining an adjacent frame displacement sequence according to the plurality of adjacent frame displacements, and obtaining a movement track of the image acquisition device during the handwriting movement according to the adjacent frame displacement sequence; and sequentially rotating and zooming the moving track to obtain a target moving track, and translating the target moving track according to any coordinate value decoded from the image data on the handwriting plane to obtain a handwriting track. The problem that in the prior art, the success rate is low when the handwriting track is extracted is solved.