70results about How to "Good results" patented technology

The invention relates to the technical field of biomedicine, and relates to a biomedicine event trigger word identification method based on characteristic automatic learning. The biomedicine event trigger word identification method comprises the following steps of 1, data pre-processing; 2, construction of an event trigger word dictionary; 3, construction of candidate trigger word examples; 4, characteristic learning by means of a convolutional neural network model; 5, training by means of a neural network model; and 6, classification of event trigger words. The biomedicine event trigger word identification method is advantaged in that 1, complex preprocessing to data is simplified, and tedious steps for carrying out a characteristic design by people are saved; 2, domain knowledge is introduced, and a lot of external resources such as unlabeled linguistic data are effectively utilized; 3, characteristic automatic learning is carried out by means of a convolutional neural network, manual intervention is reduced, sentence level characteristics in a deeper level can be excavated and explored, through the fusion of local characteristics, implicit global characteristics are discovered, and the category of trigger words can be identified; and 4, a better experiment result is obtained in MLEE linguistic data, and the whole performance on event trigger word detection is improved.

The invention discloses a recurrent neural network-based commodity question answering expert recommendation method. The method comprises the following steps of: preprocessing data; screening candidateexperts for all the users corresponding to a question answering community; constructing an expert user file corresponding to each candidate expert; carrying out training on the basis of word vectorsof specific domain knowledges so as to obtain a word vector search table; carrying out feature representation learning on the basis of a recurrent neural network model and constructing a community question answering expert recommendation model; and determining an expert recommendation sequence corresponding to a new question in a to-be-processed question answering community. According to the method, grammar and semantic information of sentences can be effectively expressed, and high-level features of sentence level can be mined, so that manual intervention is decreased and automatic training and learning can be carried out.

The invention discloses a coal and rock bore hydraulic fracture experimental apparatus, which comprises a sample device system, a confining pressure system, a fracture system, a sealing system and a monitoring system, wherein the sample device system comprises a sample cylinder, the bottom in the sample cylinder is provided with a screen drum of which the bottom is provided with a water outlet pipe, a sample is accommodated in the sample cylinder above the screen drum, and a simulated bore is formed in the sample; the confining pressure system comprises an air filling subsystem and a water filling subsystem; the fracture system comprises a fracture high-pressure water pump of which a water outlet is communicated with the simulated bore through a fracture pipeline; the sealing system comprises a sample cylinder sealing device and an experimental cylinder sealing device; and the monitoring system comprises an acoustic emission sensor arranged on an external wall of the sample cylinder. By the coal and rock bore hydraulic fracture experimental apparatus, a simulated experiment can be performed in a laboratory to investigate the change rules of crack initiation, expansion and extension in the hydraulic fracture process of a coal mine underground coal seam bore, and know a crack extending direction so as to guide field fracture; therefore, the fracture effect is greatly improved.

The invention relates to the field of medical image processing and provides a liver segmentation method and a system thereof. The method comprises the following steps of: segmenting medical image sequences of a liver to obtain segmentation images of the liver and a portal vein; obtaining a center line and a radius of the portal vein; making different marks on different segments of the liver in the center line of the portal vein; segmenting the liver based on marked center line of the portal vein. Therefore, the invention provides the method and the system for individualized liver segmentation and provides good security for clinical surgery.

The invention discloses a multi-step self-attention cross-media retrieval method and retrieval system based on a restricted text space, and the method comprises the steps: constructing the restrictedtext space of a relatively fixed vocabulary, and converting an unrestricted text space into the restricted text space; Extracting image features and text features of the limited text space through a feature extraction network; Wherein the features comprise global features, a regional feature set and associated features; Sending the extracted features into a feature mapping network, and extractingobject-level sharing information between the image and the text through a multi-step self-attention mechanism; Collecting useful information at each moment through a similarity measurement network tomeasure the similarity between the image and the text, and calculating a triple loss function. Therefore, multi-step self-attention cross-media retrieval based on the limited text space is realized. The cross-media retrieval recall rate is greatly improved by introducing a multi-step self-attention mechanism and associated characteristics.

This invention provides one handle virtual experiment chamber system, which comprises signal control process unit and signal control process unit connected input unit, memory unit and display unit to receive user input and operation orders, wherein, the signal control process unit further comprises central processor unit and one virtual experiment platform module for ratification operation. This invention provides one handle virtual experiment chamber realizing method.

The invention relates to the field of medical image processing and provides a method and system for segmenting the liver. The method comprises the following steps that firstly, an obtained medical human body nuclear magnetic resonance sequence image is segmented, the liver part, the hepatic vein part, the portal vein part and the hepatic artery part are segmented and extracted, wherein the hepatic vein part, the portal vein part and the hepatic artery part are located in the liver part; secondly, all the branch points of a vessel tree are extracted according to the segmented hepatic vein part, the portal vein part and the hepatic artery part; all the main branches of blood vessels are analyzed according to all the branch points of the vessel tree; the main branches of the hepatic vein part, the portal vein part and the hepatic artery part are marked, and the liver is segmented according to the occupied space proportion of all the main branches of the vessel tree in liver body data. The method and system for segmenting the liver provide visual reference and guarantee for clinical operations or medical experiments.

The invention discloses a method for detecting a mobile phone playing behavior of a driver based on deep learning. On the basis of deep learning for target detection, a detection result is obtained; Preprocessing is carried out on an acquired video and a convolutional neural network of the video is optimized. A video sample of a mobile phone played by a driver in a cab is collected and converted into a frame image; The method has the advantages that the real-time performance and accuracy of deep learning detection targets are greatly improved, the calculation time is shortened to a great extent, and the feature extraction accuracy of hands and mobile phones is greatly improved.

The invention discloses a piece of combined type prosthesis for breastbone reconstruction and relates to the technical field of artificial prosthesis. The combined type prosthesis comprises at least two breastbone pieces, the breastbone piece is provided with a left rib clip and a right rib clip, an insert slot is formed in the middle of the lower side of the breastbone piece, a connecting lug capable of being embedded into the insertion slot and matched with the insertion slot is arranged in the middle of the upper side of the breastbone piece, the connecting lug of the lower-side breastbone of the two adjacent breastbone pieces is embedded into the insert slot of the upper-side breastbone, connecting and fixing devices mutually matched are respectively arranged on the connecting lugs and the insert slots of the adjacent two breastbone pieces, a sternoclavicular joint or a breastbone upper fixing block is arranged on the uppermost-side breastbone piece, and a breastbone lower end block or a breast lower fixing block is arranged on the lowermost-side breastbone piece. The combined type prosthesis provides a horizontal support force and a vertical support and limit function and has a good effect of protecting thoracic cavity organs like thoracic cavity, heart and lung; the sizes, the shapes and the installation positions of the component units are adjusted at any time according to the individual differences and operation conditions of patients, the surgical operation saves time and labor, and the operation effect is good.

The invention discloses an experimental system and method for studying an action mechanism of explosive stress waves of surrounding rock. The system can change surrounding rock stress, the number of cartridge bags, the positions of the cartridge bags, the explosive charge amount, the explosive hole diameter and the like, and analyze the action mechanism, cracking speed and crack propagation situation of the explosive stress waves on the rock mass by reading strain data of the rock mass around blast holes in the instantaneous blasting process. The system for studying the action mechanism of theexplosive stress waves of the surrounding rock can study the action mechanism on a test piece when the explosive stress waves are generated, the effects of the explosive stress waves during crackingof a crack of the test piece and the effect and rule of superposition of the explosive stress waves under confining pressure of different strengths, and more deeply study the fracture dynamics theoryand stress wave theory on this basis.

The invention provides an acoustic velocity measurement device and method for a large-size elastic material. The acoustic velocity measurement device comprises a system control computer, a movable rack, a receiving hydrophone, a wide-band and high-frequency transmission transducer, a movable rack controller, a signal source, a power amplifier, a digital collection card and a measurement amplifier, wherein the signal source, the power amplifier and the wide-band and high-frequency transmission transducer are electrically connected in sequence; the system control computer, the data collection card, the measurement amplifier and the receiving hydrophone are electrically connected in sequence, and the synchronous end of the data collection card is electrically connected with the synchronous end of the signal source; the system control computer, the movable rack controller and the movable rack are electrically connected in sequence; a material to be measured is horizontally placed in a tiltable bracket in a water pool, the wide-band high-frequency transmission transducer is placed under the material to be measured, and the receiving hydrophone is placed on the material to be measured and fixed on the movable rack. According to the measurement device, the accuracy of the measurement result is ensured. The acoustic velocity in the large-size elastic material obtained by the method is in accordance with the actual situation.

The invention relates to the field of medical image processing, and provides a semi-automatic liver segmenting method and system. The semi-automatic liver segmenting method comprises the following steps of firstly segmenting an obtained medical human body nuclear magnetic resonance sequence image, and segmenting and extracting a liver part, and a hepatic vein, a portal vein and a hepatic artery in the interior of the liver; analyzing each main branch of blood vessels according to branch points of each blood vessel tree; obtaining segmenting seed points by manually marking each main branch of the hepatic vein, the portal vein and the hepatic artery, and the liver internal segmenting points; and performing segmenting on the liver according to the occupied space ratio of the marked seed points in the liver body data. The invention provides the semi-automatic liver segmenting method and system, so that visualized reference and guarantee are provided for clinical operations or medical experiments.

The invention discloses a method for evaluating the influence of to-be-tested objects (an anti-fatigue drug, an anti-fatigue and a pollutant) on the exercise tolerance of an organic body and special equipment of the method. The method comprises the following steps: (1) correcting the flow speed of a system water body; (2) screening an experimental fish shoal; (3) testing the swimming resistance; and (4) collecting experimental data, and analyzing a result. The special equipment comprises a water tank, a water pump, a container for swimming of fishes, a flow regulation valve, a flow meter, a nitrogen bottle, an oxygen bottle, a refrigerator and a high-speed camera. The method can be used for carrying out pre-warning judgment on an abnormal environmental water body, testing a drug, evaluating the exercise tolerance of different species of small-sized fishes in different water body environments, evaluating and testing the a nutritious supplementary and the like. The equipment can be automatically assembled and occupies a small area, parameters such as the temperature, the water flow speed and the dissolved oxygen amount can be controlled, and the equipment is easy and convenient to operate, relatively low in manufacturing cost and convenient for the application of relevant biological experiments.

The invention discloses a mobile application program behavior identification method based on spectral clustering and a random forest algorithm, and belongs to the technical field of network security.The method comprises the following steps: acquiring encrypted data traffic of mobile application program equipment; performing feature extraction statistics on the encrypted traffic; performing spectral clustering preprocessing on the encrypted data stream feature data set; and finally, modeling the clustered data cluster data set through a random forest algorithm. According to the method, spectral clustering is used as preprocessing to reduce the opportunity of over-fitting of a classifier, and then a random forest ensemble classifier is used to accurately identify various behaviors of an application program.

The invention relates to the field of flow detection, in particular to a single-sensing structure-oriented frequency variance calculation and amplitude value operation combined vortex shedding flowmeter pipeline vibration resisting method and system. In output signals of vortex shedding flow sensors, the frequency variances of flow signals are relatively large and the frequency variances of pipeline vibration are relatively small. When signal to noise ratios are bad, vibration harmonic waves, frequency variances of which are greater than frequency variances of flows, occur. When flow signals are same as the pipeline vibration frequencies, amplitude values of signals are suddenly increased or decreased in an intermittent manner, so as to cause measurement errors. According to the method andsystem, spectral analysis is carried out on output signals of vortex shedding flow sensors, frequency variances of spectral peak values are calculated, and amplitude values of the spectral peak values are calculated, so that vibration harmonic wave interferences are eliminated and the problem of same-frequency signal measurement errors is solved, namely, a frequency variance calculation and spectral amplitude value operation combined method is adopted to extract vortex shedding flow frequencies so that the pipeline vibration resisting performance of vortex shedding flowmeters is effectively improved.

The invention discloses a real-time semantic segmentation method with low calculation amount and high feature fusion. The network structure of the method is a multi-branch feature cross-layer fused encoding-decoding structure based on depth separable convolution. According to the method, original images with different resolutions are used as input of multiple branches, features are extracted through a residual error module formed by depth separable convolution, then feature transmission is carried out on different stages of the multiple branches, and the feature utilization rate of each stageis improved. According to the method, testing is carried out on a Cityscapes data set, and good experimental results are obtained, wherein the experimental results reach 112.3 Fps and 65.6% of mIOU. The real-time segmentation effect can be achieved while the calculation precision is met.

The invention discloses an image matching-based foreground segmentation method and device, and relates to an image matching technology and an image segmentation technology in the field of multimedia. The image matching-based foreground segmentation method is characterized by comprising the following steps of: respectively extracting local features of two input images and matching key points according to the extracted local feature information; screening wrong matching points from matching points of the obtained key points so as to obtain all the correct matching points; obtaining a feature point group on a foreground target from all the correct matching points by using clustering analysis; and obtaining the foreground target in a picture by utilizing a picture segmentation algorithm according to the obtained feature point ground. The invention furthermore discloses the image matching-based foreground segmentation device. By adoption of the image matching-based foreground segmentation method and device, foreground targets in pictures can be objectively obtained, so that the results are more accurate and intuitional, the traditional man-machine interaction method can be replaced, the whole time is decreased and the efficiency is improved.

The invention discloses a proximal femoral reaming position indicator. The proximal femoral reaming position indicator comprises a locating pin, a guide pin sleeve, a guide pin sleeve frame, a second rotation shaft, a third adjusting lever, a kirschner wire sleeve, a first guide pin, a sleeve frame, a first turn table, a second turn table, a third turn table and a fourth turn table, wherein the locating pin is sleeved by the guide pin sleeve and can be conveniently taken out; the guide pin sleeve sleeves the guide pin sleeve frame, and can be fixed by a fastening bolt fixed on the guide pin sleeve frame; the guide pin sleeve frame is fixed on a bracket, and is adjusted on the bracket vertically by rotating a first round nut; the fourth turn table is in rigid connection with an expansion link; the sleeve sleeves the first guide pin, and the sleeve is axially located through a locknut; the first guide pin is in sleeving connection with the sleeve frame. With the adoption of the proximal femoral reaming position indicator, the surgical opening of an intramedullary nail becomes small, and the minimally invasive surgery is realized; the locating is accurate, so that the surgical effect is good; the operation is simple, so that the surgical efficiency is greatly improved; the remote operation is realized, so that the ray injury caused to a doctor is avoided.

The invention discloses a method for stereoselectively synthesizing a beta-2-deoxyglycoside bond. The method comprises the following steps: performing glycosylation on 3,4-O-isopropylidene-6-O-tert-butyl diphenylmethyl silicone-D-galactosene serving as a donor, a saccharide receptor and a molecular sieve under the condition of the existence of an accelerant, wherein an isopropyl acetal protectivegroup is mounted on a 3-site hydroxyl and a 4-site hydroxyl of the 3,4-O-isopropylidene-6-O-tert-butyl diphenylmethyl silicone-D-galactosene and a TBDPS is mounted on the 6-site of the 3,4-O-isopropylidene-6-O-tert-butyl diphenylmethyl silicone-D-galactosene; through the synergistic effect of the protective groups, sugar ring conformation of the donor is controlled, and the stereoselective synthesis of a beta-configuration is realized. According to the method, the stereoselectivity of the glycosylation can be controlled effectively and stereoselectively; the method is wide in substrate application range and convenient to operate; raw materials are easy to obtain; side reactions of the glycosylation are few; a target product is high in yield and optical purity; a new design thought is provided for the research of the glycosylation.

The invention discloses a human peripheral blood chromosome synchronization preparation kit which comprises thymidine, 2'-deoxycytidine, colchicine, a 1640 culture medium and a fixing solution. According to the kit, growth cycles of peripheral blood lymphocytes are synchronized, enough 500-550 chromosome karyotypes with stripes can be obtained, so that chromosomal aberration and small abnormal structures are accurately identified. The synchronization kit adopting excessive thymidine single occlusion, deoxycytidine releasing and ethanol acetic acid harvesting is capable of increasing resolution ratio, simple in operation steps, capable of reducing the contact frequency of toxic reagents, and suitable for wide and conventional application.

The invention discloses a special auxiliary fixing device for a medical surgery. The device comprises a fixed bed body, the fixed bed body is provided with a fixed mattress, the fixed mattress is provided with a baffle pad, a fixing band, a left leg fixing band and a right leg fixing band, a protective layer is arranged on the baffle pad, the baffle pad is connected to the fixed mattress through afixing layer, one end of the fixing band is connected with the fixed mattress through a left fixing band buckle, the other end of the fixing band is connected with the fixed mattress through a rightfixing band buckle, a left connecting fixing groove is formed in the bottom of the left leg fixing band, the left connecting fixing groove is provided with a fixing connecting piece, the left leg fixing band is connected with the fixed mattress through the fixing connecting piece, a right connecting fixing groove is formed in the bottom of the right leg fixing band, a fixing connecting piece is arranged in the right connecting fixing groove, and the right leg fixing band is connected with the fixed mattress through the fixing connecting piece; the device has a novel design, is safe and reliable, is convenient to move, and can fix the head of the patient through a silicone suction cup and a head tray, thereby achieving optimal surgical results.

The invention discloses a detachable glass slide incubator. The detachable glass slide incubator comprises a stainless steel incubation frame, a silica gel cushion layer, and elastic clampers which clamps the stainless steel incubation frame and the silica gel cushion layer on a glass slide, wherein the elastic clampers clamp the incubation frame and the glass slide through clamping openings of the elastic clampers; the incubation frame and the glass slide are clamped together to form a small incubation chamber through clamping parts of the elastic clampers. The detachable glass slide incubator is reasonable in structure; when immunohistochemical staining of a tissue is performed, a non-leakage incubation small chamber is formed by tightly pressing the incubation frame on the glass slide to which the tissue sections adhere by the elastic clampers repeatedly; when anti-body incubation is performed, only a trace amount of anti-body incubation liquid can ensure that all the tissue sections adhered to the glass slide are completely soaked in the anti-body incubation liquid in the process of incubating, and thus the experimental cost for scientific research is saved; other experimental steps can also be prevented from being influenced by the incubation frame by detaching the incubation frame.

The invention relates to an anterior cervical controllable advancement apparatus. The anterior cervical controllable advancement apparatus comprises a fixed arm, a movable arm, a gear rack, a grooved limiting rod and lifting rods, and further comprises a synchronous lifting component, wherein vertebral body screws are assembled at the lower ends of both the fixed arm and the movable arm; the gear rack and the grooved limiting rod are connected to the fixed arm and the movable arm and are capable of sliding relative to the movable arm; the lifting rods are inserted in a limiting groove of the grooved limiting rod; adjusting screw rods and adjusting nuts, which are sleeved, are arranged on the lifting rods; the adjusting nuts are embedded and retained on the upper side of the limiting groove; oblique through holes are formed in the lower ends of the lifting rods; and angle fixing nails are assembled in the oblique through holes. According to the anterior cervical controllable advancement apparatus provided by the invention, lateral approach of an anterior cervical body can be achieved, and advancement of vertebral bodies related to ossification of posterior longitudinal ligament can be conducted; the advancement apparatus is flexible to use, quantitative and controllable in operation and uniform in lifting; the advancement apparatus is good in operating effect and low in injury to patients; and the advancement apparatus has a broad clinical application prospect.

The invention discloses a method for separating and culturing pig spermatogonial stem cells by a mechanical process. The method of the invention is characterized in that the characteristics of animal testicular tissue are combined, and the testicular tissue can be separated by the mechanical process and then cultured, so that the method for separating and purifying spermatogonial stem cells can be enriched. According to the invention, the pig spermatogonial stem cells can be obtained without enzyme digestion, the method of the invention has the advantages of fast cells clone and good state ofcells, and solves the problems of difficult separation, small quantity and high requirement of culture condition of spermatogonial stem cells. Compared with the separating technology of the prior art, the method of the invention has simple operation, and is capable of reducing the difficulty to obtain cells, substantially reducing the experimental cost and raising the success rate of the experiments.

The invention relates to a dynamically tuned gyroscope moving base start-stop servo locking circuit including an X prepositioned circuit, an X crossed shaft correction circuit, an X direct shaft control circuit, a Y prepositioned circuit, a Y crossed shaft correction circuit, a Y direct shaft control circuit, a multiplier input signal generation unit, an X crossed-shaft multiplier, an X direct shaft multiplier, a Y crossed shaft multiplier, a Y direct shaft multiplier, an X adder, a Y adder, an X power amplification circuit, and a Y power amplification circuit. The technical problem that a flexible joint frequently performs large angle bending because a dynamically tuned gyroscope is started when a moving base moves is solved. The circuit is easy to realize, has ideal experimental results, and improves dynamic characteristics of the flexible gyroscope.

The invention discloses a remote sensing image scene accurate classification method based Dual-ResNet small sample learning, which comprises the following steps of: firstly, performing feature extraction on two simultaneously input remote sensing scene images X1 and X2 by using ResNet 18 to respectively obtain features Gw (X1) and Gw (X2), and sharing a weight by the two ResNet-18 in a training process; secondly, calculating the distance between the two ResNet18 network extraction features, then comparing the distance between the set of features with a preset threshold value to obtain a predicted category label, and finally outputting the predicted category label. According to the method, the Dual-ResNet is used for training the two input remote sensing images at the same time, the featuredistance between the two images is obtained through respective learning, compared with common deep learning, the intra-class distance can be reduced and the inter-class distance can be increased while image features are learned, the dependence of deep learning on the data size is improved, the method has a very good effect on remote sensing image scene classification with a small sample data volume.

The invention discloses an order-preserving encryption method with a low adjustment rate for a cloud computing environment. The method mainly comprises the steps of searching for a data insertion path and inserting encrypted data; judging whether a new binary tree is balanced or not; locating the balanced binary tree and storing node information; establishing a resorted binary tree; and adjusting the binary tree to be balanced and updating heights and codes of unbalanced nodes. According to the method, an original sequence relationship of the data can be reserved while the data is encrypted; and ciphertext data in a ciphertext database is supported to be directly subjected to operations of sequencing, size comparison and the like. gmOPE (generalized mutable order-preserving encoding) is proposed; a generalized balanced binary search tree encoding-based order-preserving encryption mode is realized; any data type is supported; and any plaintext information except a sequence is not leaked. A user can define an insertion adjustment policy, so that the additional overhead caused by interaction between the user and the database, and code change is reduced and the efficiency of database addition/deletion operation is improved.

A type-II bone cement injection device comprises a probe sleeve. A grip is disposed at the tail end of the probe sleeve. The front end of the probe sleeve is provided with a serrated-edge opening which is communicated with an inner passage of the probe sleeve. The type-II bone cement injection device is characterized in that the grip is provided with a Luer taper, a connector of the Luer tape is communicated with the inner passage of the probe sleeve, and one side of the probe sleeve, close to the serrated-edge opening, is provided with an injection outlet which is communicated with the inner passage of the probe sleeve.

The invention provides a low-particle-density single-camera particle image velocity measurement method, which comprises the following steps that tracer particles are uniformly scattered into a flow field, a white light source emits a collimated stable white light beam, the light beam passes through a filter to obtain colored sheet-shaped light, the colored sheet-shaped light is emitted into the flow field to illuminate the tracer particles in the flow field, a CCD camera shoots a low-particle-density color particle picture and transmits the low-particle-density color particle picture to an upper computer, the upper computer carries out filtering processing and data downsampling on the low-particle-density color particle picture, the upper computer analyzes and reconstructs the processed low-particle-density color particle picture to obtain a high-particle-density three-dimensional particle distribution probability field, and then performs cross-correlation calculation to obtain a fluid three-dimensional velocity field. According to the low-particle-density single-camera particle image velocity measurement method, the problems existing when a three-dimensional cross-correlation algorithm is applied to a low-particle-density condition in the prior art are solved.

The invention relates to a water-retaining tree-planting material and a preparation method thereof. The water-retaining tree-planting material is composed of two layers of plant fiber substrates and a water-retaining layer between the two layers of substrates. The preparation method of the water-retaining tree-planting material comprises the following steps: smearing an adhesive on one side of the substrate, spreading the water-retaining agent flatly, and then pressurizing and compounding the two layers of substrates to obtain the water-retaining tree-planting material. The water-retaining tree-planting material of the invention is green and environment-friendly, simple to manufacture, convenient to use, wide in application range, superior in market prospect, good in use effect and stable in performance.