35results about How to "Data fluctuation is small" patented technology

The invention provides a method used detecting air purifying material purification efficiency. The method comprises following steps: a purifying material sample and a reference sample are prepared; an adsorbing material and the purifying material sample are delivered into a sealed container, a pollutant solution to be detected is delivered into a glass dish in the sealed container, the sealed container is sealed, and is unsealed after 12 to 48h of reaction, the adsorbing material is collected, and is subjected to desorption using a desorption solvent so as to obtain a desorption solution I; the reference sample is subjected to treatment same to that of the purifying material sample so as to obtain a desorption solution II; pollutant contents C1 and C0 of the desorption solution I and the desorption solution II are detected, and purification efficiency r of the purifying material is calculated based on a formula r=(C0-C1)/C0*100%. The method is simple; cost is low; the method is suitable for experimental application and industrial application, and is accurate and reliable; test results are stable; and reproducibility is high.

The invention relates to an online monitoring type intelligent electrified switching-in protection device of a lightning arrester and a control method. The device comprises a box body and a detection circuit embedded into the box body, wherein the detection circuit comprises an MCU (Micro-programmed Control Unit) control unit, an electric energy metering unit, a digital tube display unit, a power supply unit, a signal indication lamp unit, a buzzer, an operational amplification unit, a difference operational amplification unit, a current mutual induction unit, a current measuring unit and a voltage measuring unit. The method comprises the following steps: an equipment switching-in worker switches the device into a connection line of a monitor of the lightning arrester; and voltage and current are detected, and response of an indication lamp and the buzzer is combined to judge whether a temporary grounding wire is reliably grounded or not. The online monitoring type intelligent electrified switching-in protection device can be used for directly and reliably judging whether the grounding wire is reliably grounded or not; and functions of displaying grounding current and voltage by a digital tube and alarming by the buzzer and the like can be used for reminding the equipment switching-in worker that whether the temporary grounding wire is reliably grounded or not, so that hidden dangers are eliminated and safety coefficients of production are improved.

The invention discloses a test method of the aperture distribution of a hemodialysis membrane. The method comprises the following steps: dissolving one or more solutes in ultrapure water to form a simulation solution, and filtering the simulation solution through the hemodialysis membrane; testing the concentration of corresponding solute molecular weight in the simulation solution and the concentration of corresponding solute molecular weight in a filtrate; calculating a curve of the molecular diameter of the corresponding solute molecular weight and the interception rate of the hemodialysis membrane; establishing the aperture distribution function and the accumulated distribution function of the hemodialysis membrane; and carrying out nonlinear fitting on the accumulated distribution function on practically measured interception rate curve data through least squares fitting analysis software, determining the aperture distribution parameter, and substituting the aperture distribution parameter into the aperture distribution function to obtain the aperture distribution of the hemodialysis membrane. The method is used to rapidly detect the aperture distribution of the hemodialysis membrane., and has the advantages of high accuracy of measured data, simplicity and high practicality.

The invention discloses a database processing method, a database processing device, a storage medium and a terminal, which relate to the technical field of data processing, and mainly aim to solve theproblem of low data processing efficiency during capacity expansion of an existing database. The database processing method mainly comprises the steps of: determining a first data storage corresponding relationship of original data nodes by utilizing the number of the original data nodes and the number of preset virtual nodes, and determining a second data storage corresponding relationship of current data nodes by utilizing the number of the current data nodes and the number of the preset virtual nodes; according to the first data storage corresponding relationship and the second data storage corresponding relationship, determining a mapping relationship of data storage from the original data nodes to the current data nodes; and storing the target data in the original data nodes into thecorresponding current data nodes according to the mapping relationship.

The invention discloses an automatic detection method of abundance of methane-oxidizing bacteria. The automatic detection method comprises the following steps: building an automation workstation of an original state microbial oil gas and hydrate exploration technology, treating samples, finishing pipetting by the adoption of an automatic liquid treatment device at the workstation, extracting and purifying DNA by automatic nucleic acid extraction equipment, carrying out agarose electrophoresis detection, carrying out real-time fluorogenic quantitative PCR detection on abundance of methane-oxidizing bacteria, obtaining the abundance result and the like. Based on an automatic analysis method, nucleic acid extraction and purification of methane-oxidizing bacteria are automated; preparation of a specific gene PCR reaction system is automated, errors caused by human factors introduced by manual operation are minimized, operation steps are carried out in a clean environment, the whole detection process is controlled through computer software, detection procedures can be traced, and system errors can be corrected uniformly.

The invention relates to the field of big data feature extraction, and provides an agricultural feature information extraction method based on big data for the problem that agricultural data is difficult to process, which comprises the following steps: an attribute set establishment step: obtaining agricultural attribute data, and establishing a knowledge system; an attribute class clustering step: establishing an initial attribute class according to the initial attribute clustering center, and performing combination and separation operation on all the initial attribute classes to obtain clustered attribute classes; a feature attribute calculation step: calculating the dependency degree of each attribute data in the integrated attribute category relative to other attribute data, and selecting the highest value of the dependency degree as a feature attribute value; and a feature attribute collection step: selecting and collecting feature attribute values of all attribute categories to obtain a feature attribute set. The problem that an existing feature extraction method cannot reflect nonlinear structure features of data, and consequently the data utilization effect is poor can be solved.

The invention relates to a method for detecting the activity of nattokinase. The method comprises the following steps: preparing a thrombus tube, dissolving a thrombus, determining the thrombolytic length of a standard solution, drawing a standard curve, and determining the nattokinase activity of a sample to be tested. The method has the advantages of high accuracy, low data fluctuation, high stability, small amount of the sample used in the method, no complicated instruments, and realization of simultaneous determination of multiple samples, and is suitable for high-throughput screening of nattokinase activators or inhibitors.

The invention relates to a double-channel microbial sensor type BOD (Biochemical Oxygen Demand) rapid tester for emergency detection. The tester is characterized in that a constant-temperature heatingunit is additionally provided with a water bath tank, and a tank high-limit liquid level sensor, a tank low-limit liquid level sensor, a tank water temperature sensor and a tank outlet liquid temperature sensor are arranged; two microbial sensor detection units are arranged and fixedly installed on a flip cover of the water bath tank, and an elastic flexible flat-bottom film protection disc witha disc bottom hole formed in the center is additionally arranged; two gas inlet and liquid inlet units are arranged, gas flow meters and liquid inlet peristaltic pumps capable of automatically adjusting the speed are additionally arranged on two gas inlet pipes, and a mixed gas-liquid inlet pipe enters the water bath tank and penetrates through water through a solenoid structure; and displays of an electrical control unit comprise a tank water temperature display, a touch screen display and a peristaltic pump rotating speed display, a buzzer for liquid level overrun alarming is additionally arranged, and an electrical control main board is a multifunctional control main board for controlling temperature, liquid level and operation. The tester has the beneficial effect that the requirementsof BOD emergency detection on rapidness, accuracy and safety are met.

The invention discloses a robot magnetic navigation sensor applied to transformer substation routing inspection and intelligent logistics. The sensor comprises a main control unit, a Hall sensor, a data processing module, an output data identification module and a low power consumption power supply module, wherein the main control unit is used to wake up the Hall sensor, and make the data processing module to carry out data processing on collected information; the Hall sensor is used for magnetic field detection; the data processing module is used for removing a noise and an interference signal in the system; the output data identification module is used for identifying a wave peak or a trough; and the low power consumption power supply module is used for supplying power for the main control unit, a Hall component, and the data processing module. Under conditions of external disturbances and uncertainties, the magnetic navigation sensor can still accurately detect a position of a magnetic strip so that the magnetic strip position detected by an autonomous navigation robot is more accurate, and reliability of a motion path is improved. Simultaneously, a low power consumption work mode is used, work time is prolonged and work efficiency is improved.

The invention relates to a structure of a lithium battery reference electrode, belongs to the technical field of lithium battery measuring devices, and solves the technical problem of trouble in testing the charging and discharging performance of a lithium battery by a product in the prior art. The lithium battery comprises an electrode assembly, the electrode assembly comprises a negative plate and a diaphragm, the lithium battery comprises a varnished metal wire and a fixing assembly, one end of the varnished metal wire wraps an insulating film and is embedded between the negative plate and the diaphragm in the electrode assembly, the varnished metal wire penetrates through the fixing assembly in a sealing mode, and an extending section is reserved at the other end of the varnished metal wire; and one end of the enameled metal wire is electrically connected with the testing device, so that the change of the potential of the positive electrode and the negative electrode of the lithium battery in the charging and discharging processes can be monitored in time. The structure is simple, and the charging and discharging performance of the lithium battery is easy to test.

The invention discloses an internal temperature detection device of a vulcanizing machine, and relates to the technical field of rubber molding and fluidization. According to the device, a temperaturemeasuring tank is arranged on the vulcanizing machine through a fixing frame, one side of a tank body of the temperature measuring tank is provided with a supporting pipe, an included angle between the supporting pipe and the tank body is formed, a temperature measuring resistor is arranged in an accommodating cavity at one end, away from the temperature measuring tank, of the supporting pipe, one end of a temperature measuring guide rod is connected with the temperature measuring resistor, the other end of the temperature measuring guide rod extends into the tank cavity of the temperature measuring tank through a pipe hole of the supporting pipe, and the temperature measuring resistor does not make direct contact with steam flowing through the temperature measuring tank, so that steam impact is avoided, the measuring result is accurate, and the service life of the temperature measuring resistor is long; and the included angle is formed between the supporting pipe and one end of a steam introduction pipe of the tank body, so that condensate water does not interfere with the temperature measuring resistor and the temperature measuring guide rod, the data fluctuation is small, and the false alarm happens seldom. The internal temperature detection device has the advantages of being reasonable in design, simple in structure, small in maintenance strength and good in production continuity.