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Liver tumor segmentation method and device based on CT (Computed Tomography) image

ActiveCN105574859AIncrease success rateGood divisibilityImage enhancementImage analysisGold standardComputed tomography
The invention provides a liver tumor segmentation method and device based on a CT (Computed Tomography) image. The method comprises the following steps: performing Gaussian denoising on CT image data of a liver, converting the denoised CT image data into standardized data of which a gray average is 0 and a variance is 1, and performing down-sampling operation; extracting a lesion slice and a normal tissue slice from a gold standard image of the CT image of the liver, and classifying the lesion slice and the normal tissue slice into a positive sample and a negative sample; constructing a multi-level depth convolutional neural network, training a model through a stochastic gradient descent to obtain a network model, and acquiring a coarse segmentation binary image of a tumor and a pixel-classification probability image through a classifier; performing morphological erosion operation on the coarse segmentation binary image of the tumor to obtain a foreground image needed by graph cut, performing subtraction operation on the binary image of a liver and the coarse segmentation binary image of the tumor, and performing the morphological erosion operation to obtain a background image corresponding to normal tissues of the liver; and constructing an undirected graph, and obtaining a finial segmentation region of the tumor through a graph cut optimization algorithm.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI +1

Version control method, code testing method and system

Embodiments of the invention provide a version control method, a code testing method and system, and relate to the technical field of software development. According to the version control method, the code testing method and the system, a mistake in a newly submitted code can be discovered in time; a successful rate of full amount static code testing is improved; and a development period of a software product is shortened. A specific scheme provided by the emobodiments of the invention comprises: a version control system receiving an incremental data; creating an interim branch, and storing the incremental data in an interim code base, wherein the interim branch is a subordinate branch of a formal branch, and the data of the formal branch is stored in a formal code base; sending the data of the interim branch and an incremental identification to a continuous integrated system; receiving a first feedback message sent by the continuous integrated system, wherein the first feedback message is used for indicating that the data of the interim branch has passed an incremental static code test and an incremental construction test; and combing the incremental data twith the data of the formal branch. According to the invention, the version control method, the code testing method and the system are used for software development.
Owner:HISENSE VISUAL TECH CO LTD

Manufacture method of reversible bonding micro-fluidic chip with high strength

The invention discloses a manufacture method of a reversible bonding micro-fluidic chip with high strength. The manufacture method includes using a sacrificial layer mold to manufacture and integrating a polydimethylsiloxane (PDMS) membrane of a micro pipeline structure firstly, aligning and attaching a structure face of the PDMS membrane to a pre-punched rigid substrate, then attaching the other rigid substrate with PDMS pre-polymer and curing agent mixed liquor coated in spin mode in advance to the back of the PDMS membrane, then solidifying to obtain a completely seamless attached substrate-PDMS-substrate sandwich type micro-fluidic chip, and finally, clamping two rigid substrates of the sandwich type micro fluidic chip from the upper and lower faces by using a clamp, and therefore the ability of tolerating applied pressure intensity of the micro pipeline structure of the sandwich type micro-fluidic chip is enhanced. The sandwich type micro-fluidic chip of a combination clamp simultaneously has superiorities of assembling reversibly and resisting high pressure, broadens the applied range of the reversible bonding micro-fluidic chip greatly, and reduces application cost of the micro-fluidic chip.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Method for controlling transport robot to autonomously enter elevator

The invention discloses a method for controlling a transport robot to autonomously enter an elevator. The method for controlling the transport robot to autonomously enter the elevator comprises the following steps of navigating the robot to a doorway of the elevator by utilizing an own navigation device of the robot, before the robot enters the elevator, obtaining the position of an elevator call button by utilizing a robot vehicular vision module with depth information collection, triggering the elevator call button according to the position information of the elevator call button, and calling the elevator; obtaining the state information of an elevator door by utilizing a retreating sensor module, and controlling the robot to enter the elevator. According to the method for controlling the transport robot to autonomously enter the elevator, through combining with signals obtained by a Kinect sensor and the retreating sensor module, the past way that an instruction is sent to an elevator controller by a remote control center is thoroughly changed; the past way is changed into the way that an instruction is sent to the robot by the remote control center, the instruction is sent to a PLC (Programmable Logic Controller) by a robot vehicular controller and the elevator is triggered through an arm of the robot; by combining with the redundant design of a full load judgment condition module in the elevator, the control safety performance of the elevator is promoted.
Owner:CENT SOUTH UNIV

Cable-controlling submersible vehicle capable of efficiently withdrawing AUV underwater

The invention relates to a cable-controlling submersible vehicle capable of efficiently withdrawing an AUV underwater. The cable-controlling submersible vehicle comprises supporting frames and buoyancy blocks, wherein the supporting frames and the buoyancy blocks are symmetrically mounted on the two sides of an AUV docking mechanism. The buoyancy blocks are fixed to the tops of the supporting frames. Each buoyancy block is provided with a plurality of horizontal propellers and vertical propellers, a camera with a lamp is mounted at the front end of each buoyancy block, a sonar system is mounted at the top of the buoyancy block on one side, and a laser communication unit is mounted at the top of the buoyancy block on the other side. The AUV docking mechanism comprises an outer support and an AUV garage fixed into the outer support. A funnel guiding port is mounted at the front end of the AUV garage, and the AUV docking mechanism is fixedly connected with the buoyancy blocks on the two sides through the outer support. The cable-controlling submersible vehicle carries the AUV docking mechanism to adjust the depth, direction and gesture of the AUV docking mechanism, and has the advantages that the AUV docking success rate is high and the docking process is safe. The outline structure of the cable-controlling submersible vehicle can be adjusted, the AUV docking mechanism can be easily replaced with AUV docking mechanisms of different sizes in a modular mode, and thus the cable-controlling submersible vehicle has the advantage of high adaptability.
Owner:CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)

Fingerprint identification method and device

The invention discloses a fingerprint identification method and device. The fingerprint identification method comprises the steps of: obtaining a fingerprint image to be identified, and extracting first characteristic points in the fingerprint image to be identified; if the number of the first characteristic points in the fingerprint image to be identified is smaller than a preset threshold, selecting a fingerprint template image according to the first characteristic points in the fingerprint image to be identified, and obtaining second characteristic points, matched with the first characteristic points, in the fingerprint template image; according to the first characteristic points and the second characteristic points, superposing the fingerprint image to be identified with the fingerprint template image, generating a superposed image, and obtaining effective superposing areas between the fingerprint image to be identified and the fingerprint template image; and according to the effective superposing areas, judging whether the fingerprint image to be identified is matched with the fingerprint template image, and carrying out fingerprint identification according to the matching result. By adopting the fingerprint identification method provided by the invention, fingerprint identification under the condition that the characteristic points are fewer is realized, the success rate of the fingerprint identification is improved, and the false identification rate is reduced.
Owner:BYD SEMICON CO LTD

Two-dimensional ultrasonic area array probe and manufacturing method thereof

The invention discloses a two-dimensional ultrasonic area array probe, which comprises a piezoelectric array, matched layers, backing materials, decoupling materials, a plurality of connection ports and conductive electrodes, wherein the piezoelectric array consists of a plurality of piezoelectric units which are arranged at equal intervals; a strip of matched layer covers each row or column of piezoelectric units on the piezoelectric array, and is used for realizing matching with the acoustic impedance of air; the backing materials are positioned below each row or column of piezoelectric units of the piezoelectric array, and are used for absorbing ultrasonic waves downwards transmitted by the piezoelectric array; the decoupling materials are filled into gaps among the piezoelectric units of the piezoelectric array; one connection port is shared by each row or column of piezoelectric units in the piezoelectric array, and is used for connection with an external wire; and the conductive electrodes are used for electrically connecting each strip of backing material and each strip of matched layer with the connection ports. The invention also discloses a manufacturing method of the two-dimensional ultrasonic area array probe. According to the two-dimensional ultrasonic area array probe disclosed by the invention, the conventional connection technology is optimized, the number of connecting wires is decreased, the process difficulty is lowered, and the accuracy and manufacturing efficiency of the two-dimensional ultrasonic area array probe are improved.
Owner:HUAZHONG UNIV OF SCI & TECH
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