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723 results about "Test group" patented technology

Sleep apnea syndrome assessment method based on electrocardiogram signals

InactiveCN106361277AStrong recognition abilitySolve the waste of manpower and material resources,Diagnostic recording/measuringSensorsEcg signalMedicine
The invention discloses a sleep apnea syndrome assessment method based on electrocardiogram signals. The method comprises the following steps: acquiring the night electrocardiogram signals; pre-processing the electrocardiogram signals so as to obtain clean electrocardiogram signals; finding out the position of a peak value of R wave by virtue of R wave detecting algorithm, and conducting calculation so as to obtain RR sequences; interpolating the RR sequences, so that the RR sequences are identical in length; and dividing the interpolated RR sequences into three groups in accordance with a sample: a pre-training group, a fine-adjusting group and a test group, wherein by virtue of the pre-training group and the fine-adjusting group, an OSAS (obstructive sleep apnea syndrome) recognition model is constructed and optimized, and by virtue of the test group, an assessment result of the model on the OSAS is obtained. The method provided by the invention, by collecting the human electrocardiogram signals in a noninvasive mode, can be used for assessing the sleep apnea syndrome, and for the RR sequences extracted from original electrocardiogram signals, characteristic learning and OSAS recognition model construction can be conducted by virtue of a sparse self-coding network; meanwhile, network parameters are optimized through micro-adjusting, so that the model is more excellent in recognition capacity and good assessment is conducted; and the method provided by the invention is available by collecting the electrocardiogram signals within 8h at night.
Owner:SUN YAT SEN UNIV

Control of radiation injury

The invention relates to the field of drug development against acute radiation injury caused by exposure to high-energy electromagnetic waves (X-rays, gamma rays) or particles (alpha particles, beta particles, neutrons). To date, there is no effective drug to ameliorate radiation injury after accidental exposure to ionizing irradiation. The invention provides a method of treating radiation injury of a subject in need thereof comprising administering to the subject a peptide, or functional analogue or derivative thereof, of smaller than 30 amino acids. Furthermore, the invention provides use of a peptide, or functional analogue or derivative thereof, of smaller than 30 amino acids for the production of a pharmaceutical composition for the treatment of a subject suffering from or believed to be suffering from radiation injury. In particular, the invention provides anti-radiation peptides having a dose reduction factor (DRF) against acute gamma irradiation of at least 1.10, said DRF determinable by testing which dose of radiation results in 50% mortality at 30 days (LD50/30) after whole body radiation (WBI) in a test group of mice treated with said peptide at 72 hours after WBI and, testing which dose of radiation results in 50% mortality at 30 days (LD50/30) after whole body radiation (WBI) in a control group of mice treated only with the vehicle of said peptide at 72 hours after WBI and wherein the DRF is calculated by dividing the LD50/30 of the peptide-treated animals by the LD50/30 of the vehicle-treated animals.
Owner:BIOTEMPT

Comprehensive insulation and voltage resistance testing device of electric connector

The invention relates to a comprehensive insulation and voltage resistance testing device of an electric connector. Contact couples of electric conversion connector interfaces, which are connected with the electric connector to be tested, are divided into four test groups in a staggered row and staggered column mode; in the four test groups, a testing cable switches a common output interface connected with a testing power supply; a sequential control circuit controls the transverse short circuiting of the four test groups to test the transverse voltage of the contact couples, the longitudinal short circuiting of the four test groups to test the longitudinal voltage of the contact couples and the short circuiting of the four test groups to test voltage between the contact couples and a casing; and the comprehensive results of the testing voltage in the transverse direction and the longitudinal direction and between the contact couples and the casing are compared with insulation parameters and dielectric withstand voltage parameters which are set in a control system to complete the performance testing of an electric connector product to be tested. The invention has the advantages of few testing steps, short fixed conduction time, large testing quantity within unit time, high testing efficiency and testing degree of automation, accurate control of testing time, ensured voltage increase time of insulation and dielectric withstand voltage and accurate testing result.
Owner:CHINA NORTH IND GRP HANGLIAN TECH CO LTD
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