32results about How to "Scientific test results" patented technology

The invention discloses a same-pond procambarus clarkii family culture method by use of enclosures. The culture method is characterized by comprising the steps of 1) fabricating and mounting the pond enclosures, 2) procambarus clarkii family shrimp breeding, 3) culture management and 4) harvesting. According to the same-pond procambarus clarkii family culture method by use of the enclosures, the enclosures of the same specification are built for every procambarus clarkii families by use of HDPE boards in the pond, small holes are evenly formed in the enclosures, and water regularly is fed into the whole pond or completely drained so that the water quality environment in every enclosure is kept consistent as much as possible, and meanwhile, the mutual effects of different families are also avoided. The same-pond procambarus clarkii family culture method by use of the enclosures is adopted for developing same-pond culture tests, the ecological environment of the natural water area is simulated, the difference of the test conditions and the natural environment can be greatly reduced, the test results are more scientific and more obvious in pertinence, and finally, the purpose of same-pond culture and control of different families is achieved and reliable basis is provided for subsequent selective breeding of good varieties.

The invention discloses an engine oil viscosity online detection device and a detection method thereof. The device is sequentially connected with an oil sampling device composed of a solenoid valve, a liquid level sensor and a second temperature sensor, a constant flow pump and a pressure sensor through an oil supply pipeline. , a flow sensor, a pressure control valve and a cooling device. The device also includes a constant temperature oil bath box nested outside the sampling device, which is composed of a heater and a first temperature sensor, a data processing module connected to each sensor, and an electromagnetic A single-chip microcomputer connected to a valve, a heater, a constant flow pump and a pressure control valve; the detection method is to create a standard temperature for oil viscosity detection, simulate the actual working pressure of the engine oil, and combine a data processing module and a single-chip microcomputer to detect the oil viscosity online. The invention can monitor the viscosity of the engine oil in real time, the detection result is more scientific and accurate, and provides a more immediate and effective basis for changing the oil.

The invention a method for testing and predicating the wearing of an excavating device cutter in a soft soil environment. The method simulates the actual working condition of engineering through a test technique, and predicts the wearing of the cutter in the actual engineering. The method can be used to scientifically and effectively test the wearing condition of the excavating device cutter in the soft soil environment, the onsite inspection and maintenance of the cutter are guided through the test of the wearing of the cutter, and the actual wearing amount of the cutter is calculated to determine the replacing cycle of the cutter, so inspection and maintenance personnel has no need to frequently enter a pressure chamber in the engineering and detect, the workload is reduced, and the excavating engineering process is improved; and the method fully considers the characteristics of the influences of the soft soil on the wearing of the cutter, and the optimal test running time is determined through preliminary test to make the test result scientific and close to the actual working condition, so the error of the test is reduced to well guide the engineering practice.

The invention discloses a test method for simulating the active damage of a shield tunnel excavation face. The method includes the steps that after filling in a model box is completed, standing is performed for a period of time, and initial readings on micro water-soil pressure monitoring elements on the cutterhead of a model shield machine, a displacement meter monitoring element in soil in frontof the excavation face and a displacement meter monitoring element on the earth surface are recorded; the model shield machine is made close to the hole of the model box; a jacking motor, a cutterhead motor and a spiral excavator motor of the shield machine are turned on at the same time, and the model shield machine starts tunneling; when the model shield machine excavates to a preset position,the jacking motor, the cutterhead motor and the spiral excavator motor are turned off at the same time; a shield excavation face active damage test is started; the water-soil pressure value on the cutterhead, the displacement value of the soil in front of the excavation face and the settling volume of surface soil are recorded, and after standing for a period of time, numerical values of the monitoring elements are measured. In the method, it is taken into account that the early excavation process of the model shield is consistent with the truth of the influence of the early tunneling processon the true active damage of the shield excavation face.

The invention discloses an ultrasonic bird repeller detector and a detection method and relates to the technical field of instrument detection. The detection method comprises the steps as follows: acquiring an ultrasonic signal sent by an ultrasonic bird repeller; acquiring the amplified ultrasonic signal as well as the frequency and amplitude of the amplified ultrasonic signal; acquiring the distance between the ultrasonic bird repeller detector and the ultrasonic bird repeller; acquiring an ultrasonic sound intensity measurement signal according to the amplified ultrasonic signal and the maximum ultrasonic sound intensity detected by the ultrasonic bird repeller detector; acquiring an ultrasonic sound intensity actual signal according to the ultrasonic sound intensity measurement signal; displaying the frequency and amplitude of the ultrasonic signal, the distance and the ultrasonic sound intensity actual signal. The detector can judge whether the ultrasonic bird repeller works or not remotely and know the ultrasonic frequency, the distance between the detector and a target as well as the ultrasonic radiation intensity, brings great convenience to a user to master the work condition of the ultrasonic bird repeller and is suitable for field work.

The invention belongs to the field of gene detection, and in particular relates to a susceptibility gene detection panel related to skin aging characteristics and its application. The detection panel is used to detect 33 skin aging characteristics related susceptibility genes of human genomic DNA. The panel includes multiplex PCR amplification primers and single base extension primers for 45 SNP sites. Compared with the prior art, the present invention covers a large number of susceptibility gene loci related to skin aging symptoms, and is specifically aimed at the skin gene detection of Asian populations (especially Chinese populations), which can more efficiently and scientifically evaluate individual skin conditions, and can effectively evaluate the skin condition of individuals. Analyze the root causes of skin problems, and provide scientific basis for accurate skin care and personalized skin care products customization for Asian people (especially Chinese people).

The invention relates to an on-line leakage detection device for a tube type heat exchanger, belongs to the field of tube type heat exchanger detection equipment, mainly solves the problem of how to check whether a heat exchange tube is damaged and leaks or not when raw material gas and liquid exchange heat with a heat exchange tube in a shell for cooling, the device comprises a detection body and a hose, and a liquid inlet is set at the back of the detection body; a liquid storage chamber is arranged in the detection body, the liquid inlet is communicated with the liquid storage chamber, a pump is arranged in the liquid inlet, one end of the hose is connected with the liquid inlet, and the other end of the hose is provided with a connector. A PCB is arranged in the detection body, an amplification circuit, a filter circuit, an AD conversion circuit and a micro single-chip microcomputer are arranged on the PCB, two electrodes are arranged on the inner wall of the liquid storage chamber, and the two electrodes are connected with the amplification circuit through circuits. In the invention, the detection process is standard and reasonable, the detection result is scientific and effective, the device is small and portable, a charging mode is adopted, and the device is convenient to carry to the actual working scene of the heat exchanger.