32 results about "Life stress" patented technology

The invention discloses an accelerated life testing method of a water quality analyzer. The accelerated life testing method of the water quality analyzer comprises the following steps: putting the water quality analyzer into an integrated environmental testing chamber and controlling the integrated environmental testing chamber to change temperature periodically to measure the water quality analyzer through cyclic tests; in a single period, calibrating the water quality analyzer, then measuring four water samples in sequence with sequentially increased measurement temperatures and then measuring zero samples and standard samples after measuring the water samples; judging invalidation respectively in each period after the measurement on each zero sample and each standard sample is ended; measuring circularly in periods till the water quality analyzer is invalid, and recording invalid time and temperature and humidity when the water quality analyzer is invalid. With the temperature as accelerated life stress, an improved step accelerated life testing method is applied to the reliability evaluation of the water quality analyzer, and the reliability of the water quality analyzer can be tested by virtue of few test samples and relatively short time.

The invention discloses a method for testing the accelerated life of an electronic product based on a life-stress model. The method comprises the following steps of: 1, defining the life characteristics of a sample; 2, defining failure criteria; 3, performing accelerated life test of the maximum stress combination; 4, performing accelerated life test of the other combinations, namely performing the test of other four different groups of stress combinations except for the maximum stress combination; 5, processing failure data, namely fitting a weibull distribution model of total life of all groups of test samples by a weibull distribution fitting analysis method and solving the corresponding life characteristic parameter; 6, estimating an accelerator model parameter; 7, determining humidity stress under the using condition; and 8, extrapolating sample failure distribution under the using condition. The method can obviously shorten the time of the accelerated life test of the electronic product, and improve the accuracy of a test result. The method has good practical value and wide application prospect in the technical field of the accelerated life test.

The invention discloses a mental stress detection method based on heart rate and social media micro-blog and belongs to the technical field of life stress detection. In the invention, mental stress detection is carried out, on the basis of the heart rate and social media micro-blog, in the manner of: firstly, acquiring a heart rate from an electrocardiosignal; according to the Poisson probabilitymodel, detecting and recognizing an abnormal microblogging (stress / excitement) zone from the micro-blog; then correlating every heart rate abnormal zone with the abnormal microblogging zone in time-synchronized and highly-matched manner; finally on the basis of the matching result, determining whether the heart rate abnormal zone belongs to stress zone or excitement zone, and the stress source event or positive event, which cause the abnormal zone. The analysis make everybody to be aware of influence on health from stress caused by threat, damage or challenge, so that everybody can have a natural mental status to deal with the stress or calm down from the stress source event. For the first time, the mental stress detection is achieved on the basis of the heart rate and social media micro-blog.

The invention discloses an accelerated life testing method of a water quality analyzer. The accelerated life testing method of the water quality analyzer comprises the following steps: putting the water quality analyzer into an integrated environmental testing chamber and controlling the integrated environmental testing chamber to change temperature periodically to measure the water quality analyzer through cyclic tests; in a single period, calibrating the water quality analyzer, then measuring four water samples in sequence with sequentially increased measurement temperatures and then measuring zero samples and standard samples after measuring the water samples; judging invalidation respectively in each period after the measurement on each zero sample and each standard sample is ended; measuring circularly in periods till the water quality analyzer is invalid, and recording invalid time and temperature and humidity when the water quality analyzer is invalid. With the temperature as accelerated life stress, an improved step accelerated life testing method is applied to the reliability evaluation of the water quality analyzer, and the reliability of the water quality analyzer can be tested by virtue of few test samples and relatively short time.

The invention relates to the technical field of healthcare food, in particular to a composition, a preparation method and application thereof. The composition comprises, by weight, 15-25 parts of notoginseng extract, 25-45 parts of ginkgo leaf extract, 25-45 parts of hawthorn extract and 30-55 parts of tea polyphenol. The preparation method includes: mixing raw materials according to the above proportion. The invention further relates to a capsule which comprises a soft capsule shell and the composition contained in the soft capsule shell. The raw materials of the composition cooperate with each other, so that the composition can play a great role in lowering blood lipid and improving memory and is definite in efficacy, safe, free of side effect and capable of helping people in improving blood lipid level, life quality and memory level and relieving life stress.

The invention relates to a fatigue testing device of a honeycomb panel and a testing method and belongs to the technical filed of performance testing of materials. The fatigue testing device of the honeycomb panel is characterized in that an air pressure operated nut locking trapezoid cross-section clamping fixture is mounted on a lower base of a fatigue testing machine through a vertical testing bracket; a test sample to be clamped is vertically clamped by the air pressure operated nut locking trapezoid cross-section clamping fixture; an eccentric wheel vibrator is arranged at the bottom end of the test sample to be clamped; the eccentric wheel vibrator is sequentially connected with an eccentric wheel and an external frequency converter; on / off operation of the external frequency converter is controlled by a motor; the lower part of the test sample to be clamped is respectively connected with a capacity strain gage and an electric eddy current precision displacement sensor. According to the testing method, fatigue life test results corresponding to different stress values are obtained, so that a life-stress curve line is created and the fatigue testing of the honeycomb panel is completed; a honeycomb panel clamp holder of the fatigue testing device has a trapezoid cross section, so that the honeycomb is prevented from being damaged; the test sample is vertically placed, so that the test sample is uniformly stressed; the testing method is convenient and feasible, and the accuracy of testing is ensured.

The invention discloses a weld seam fatigue life calculation method based on total strain energy density. The method mainly comprises the steps that 1, the weld-seam total strain energy density, a life function equation and a fatigue strength coefficient, a fatigue strength index, a cyclic strengthening coefficient and a cyclic strain hardening index which are needed by half-cycle life stress and a strain function equation are acquired through a welded joint fatigue test; 2, the weld seam structure is simulated through a shell unit module, the stress-strain response of the weld seam structure under the cyclic load action is calculated through a multi-load step method, and a stress-strain hysteretic curve is output; 3, the total strain energy density is calculated according to the stress-strain response, and the hot point fatigue life and a damage value of a weld toe of the weld seam are calculated by combining the energy density with the life function equation. According to the method, contribution of elastic-plastic stress and strain to the fatigue damage is comprehensively taken into account, scalar quantities are taken as damage parameters, the position and direction problems related to vectors are effectively avoided, the calculation precision is improved, and the time is saved.

The invention discloses a health care wine for fatigue endurance and sleep regulation and a method for preparing the health care wine. The health care wine for fatigue endurance and sleep regulation is formed by brewing the following raw materials in the following proportions: 4000-8000 g of fresh grapes, 4000-8000 g of fresh mulberries, 50-100 g of astragali radix, 50-100 g of virgin soil, 20-30g of white prepared lateral root of aconite, 20-30 g of cooked rhubarb, 20-30 g of honey-fried licorice root, 300-500 g of ginger, 100-200 g of sweet osmanthus, 9-15 g of notopterygium root, 1000-3000 g of Chinese date, 2000-3000 g of lily, 2000-4000 g of fushen, 20-30 g of amomum cardamomum and 60-100 L of white spirit. The health care wine is capable of enduring fatigue, regulating sleep, recuperating liver and kidney, settling the viscera and enhancing the disease resistance of a human body, and has a good regulation effect for laziness, fatigue, insomnia and dreaminess, soreness and weakness of waist and knees, muscle weakness, hyposexuality, hair loss and the like caused by life stress.

The invention relates to the technical field of healthcare food, in particular to a composition, a preparation method and application thereof. The composition comprises, by weight, 15-25 parts of notoginseng extract, 25-45 parts of ginkgo leaf extract, 25-45 parts of hawthorn extract and 30-55 parts of tea polyphenol. The preparation method includes: mixing raw materials according to the above proportion. The invention further relates to a capsule which comprises a soft capsule shell and the composition contained in the soft capsule shell. The raw materials of the composition cooperate with each other, so that the composition can play a great role in lowering blood lipid and improving memory and is definite in efficacy, safe, free of side effect and capable of helping people in improving blood lipid level, life quality and memory level and relieving life stress.

The invention discloses a herbal tea formula for treating pharyngitis. According to the formula, the composition is prepared from radix panacis quinquefolii, radix adenophorae, radix ophiopogonis, radix polygonati officinalis, radix rehmanniae, radix platycodonis, fructus schizandrae, radix angelicae sinensis, radix paeoniae alba, flos rosae rugosae, fructus lycii, semen ziziphi spinosae, fructusmume and rock sugar. Compared with the prior art, the purpose of regulating chronic diseases is achieved through daily drinking, and meanwhile the defects of bad taste of taking drugs and poor compliance of taking the drugs for treating diseases are overcome. The drink is mainly used for nourishing yin to lessen fire, maintaining the body and soothing the liver; modern people have great life stress and stay up late, so that they have liver-qi depression and fire excess caused by yin deficiency, and for them, through long-time drinking, the bodies can be regulated.