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103 results about "Cross matching" patented technology

Cross Matching is a procedure performed prior to a blood transfusion to determine whether donor blood is compatible (or incompatible) with recipient blood.

Method for automatically recognizing abnormal velocity event in surveillance video

The invention discloses a method for automatically recognizing an abnormal velocity event in a surveillance video. The method comprises the steps that (1) frame images are read from the monitoring video, image processing is conducted, and therefore a needed image sequence is obtained; (2) a statistical average method and mixture Gaussians background modeling are adopted to establish a background model, and a background differencing method is used for detecting a foreground target set; (3) a cross matching detecting method and a Mean-shift algorithm are combined for tracking a moving target corresponding to each foreground target in the foreground target set so as to obtain the position information of each moving target; (4) the speed of each moving target is calculated, and when the speed of each moving target exceeds a preset threshold, an alarm is given out; otherwise, the step (1) is executed. By the adoption of the method for automatically recognizing the abnormal velocity accident in the monitoring video, foreground targets corresponding to moving targets can be accurately detected, the foreground targets are used for guaranteeing that the positions of the moving targets do not deviate to the largest degree, and the abnormal velocity accident can be recognized more accurately.
Owner:广东安信科技有限公司

Biometric key extraction method based on fingerprint bit string and error correction coding

The invention provides a biometric key extraction method based on a fingerprint bit string and error correction coding. The biometric key extraction method based on the fingerprint bit string and the error correction coding comprises the following steps: designing an irreversible and changeable variable function or parameter based on the fingerprint bit string and the error correction coding algorithm to transform the original biological features; transforming the original template into a conversion template; and generating a biological feature revocable template. According to the invention, the problem of automatic registration between the registration template and the verification template in the transform domain is solved by means of fuzzy extraction, therefore, the rejection rate of the biological authentication is low, and the availability of the authentication scheme is ensured. The invention takes the fuzzy extraction technology as the main line and combines the error correction coding technology to extract the unique and stable key from the fingerprint images with certain randomness and fuzziness, and any step does not need to store original fingerprint information, therefore, the user fingerprint privacy information can be maximally protected while realizing the fingerprint feature encryption; the biometric key extraction method based on the fingerprint bit string and error correction coding can resist the brute force attack, the tampering / intercepting template database attack and the multi template cross matching attack based on ARM homologous fingerprints.
Owner:NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP

Blood extraction centrifuge and centrifugal extraction method

ActiveCN108905299ASimplify the process of drawing bloodAvoid pollutionLiquid separationBlood collectionCentrifugation
The invention discloses a blood extraction centrifuge and a centrifugal extraction method. Before performing the operation such as the cross-matching tests, the blood in a blood reservoir is transferred to a test tube and is subjected to centrifugation, and the operation is complicated. The blood extracting centrifuge of the invention comprises an upper shell, a lower shell, a needle injector, a blood collection device, a thimble, a base, a centrifugal mechanism, test tubes, an upper needle gripper, a tube gripper, a tube unloading gripper, and a test tube storage box and a waste storage tube-collection box. The needle injector includes an upper spit shell, a lower spit shell, a needle, a push rod, a pusher holder and a needle driving member. The blood collection device includes a pin moving block, an upper clamping tube block, a lower clamping tube block, an upper clamping tube screw rod, a lower clamping tube screw rod, a blood collecting tube, a blood collecting electric push rod, apin moving screw rod, a first blood collecting motor, a second blood collection motor and a third blood collection motor. The centrifuge can transfer the blood in the blood storage tube into the testtube and complete the centrifugal layering work of the blood, which simplifies the process of taking blood by the medical staff.
Owner:HANGZHOU DIANZI UNIV

Automatic positioning and early-warning method of problem data of report output results

The invention discloses an automatic positioning and early-warning method of problem data of report output results. The method includes the steps that first, a rule base is pre-established, external early-warning algorithms are predefined for the rule base, the early-warning algorithms are achieved through early-warning algorithm expressions, and the early-warning algorithm expressions comprise a plurality of variables connected through operators; second, reports are established, and the early-warning algorithms are respectively related to all the reports; third, an early-warning algorithm matching actuator is established, and real-time data values of all the variables of the early-warning algorithm expressions are acquired; fourth, all the reports are detected by a system in real time, the corresponding early-warning algorithm expressions are executed, operation is performed according to the operators defined by the early-warning algorithm expressions, and early-warning result values are returned; fifth, the returned early-warning result values and data sets carried in the reports are matched in a crossed mode, and problem data in the data sets carried by the reports are found through a comparison algorithm; sixth, early-warning marks are made for the problem data by the system, and the problem data are displayed onto a client.
Owner:智业软件股份有限公司

Automatic cross-matching testing method suitable for known blood types

The invention discloses an automatic cross-matching testing method suitable for known blood types. Before the blood transfusion, a professional examiner needs to finish a cross-matching test in a specialized laboratory. A tester comprises an upper-part shell, a lower-part shell, a needle ejection device, a hemostix, a needle ejector, a reagent absorbing and adding mechanism, a base, a centrifugaltest mechanism, a blood matching test tube, a microscope camera, an extraction pipe hand claw, a test tube hand claw for the test, a test tube hand claw for a blood receptor, a test tube storage box,an extraction tube storage box, a waste test tube collection box and a waste extraction tube collection box, wherein the centrifugal test mechanism comprises an upper disc, a support disc, a centrifugal rotating shaft, a positioning rotating shaft and a lifting shaking assembly; and the reagent absorbing and adding mechanism comprises a reagent disc, a layering collector, a condensed amine mediumreagent storage, a serum guiding pipe, a normal saline storage box, a first serum storage box and a second serum storage box. According to the method, the blood type detection and cross-matching testcan be automatically finished, and the workload of medical workers in the blood matching process is simplified.
Owner:HANGZHOU DIANZI UNIV
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