40results about How to "Meet the needs of experimental research" patented technology

The invention relates to a generating device of quasi-monodispersed submicron aerosol by using an evaporation condensation method. The generating device comprises a high-pressure gas source, a first filter, a sprayer, a diffusion desiccator, a second filter, a saturator, a reheater, a condenser tube, and a first valve as well as a second valve, wherein, the first valve and the second valve are respectively used for adjusting the flow capacity of the second filter and the saturator; the high-pressure gas source adopts a high-pressure air source; the reheater and the condenser tube adopt metallic conduits; a baffle plate is arranged at a jet exit of the sprayer; a screen mesh or a closing ring is arranged at the inlet of the condenser tube. The generating device is convenient and durable, the running cost is low, the median diameter in aerosol generating counting ranges from 0.08 micrometres to 0.5 micrometres, the geometric standard deviation is less than 1.3, the counting concentration ranges from 1*10<4> to 1*10<8>/cm<3>, the stability and the repeatability are good when in generation, and the requirements of various equipment inspections and experimental researches can be satisfied.

The invention relates to a 1600kV/50mA outdoor mobile direct current voltage generator which comprises a direct current voltage generator body, a charging voltage regulation device and a computer measuring and controlling system; the direct current voltage generator body adopts a five-stage voltage doubling rectifying circuit with symmetrical single sides, the complete set of the test units adopts a tower type combined structure and a container transportation method as well as the modular design. A direct-current voltage generator body module, the charging voltage regulation device, a computer measuring and controlling system operating platform are respectively provided with hoisting devices, and the hoisting devices can be moved on a transport vehicle; the invention utilizes the 50Hz power frequency power supply as the rectifier source to obtain the direct-current voltage, the quality of the direct-current power supply is good, the capacity is large, and the demands of experimental investigation of the extra-high voltage direct current transmission project can be met; and due to the adoption of the modular design, the rapid assembly and disassembly can be realized on site, and the polarity can be changed according to the complete set of the test units with required testing voltage.

The invention provides dynamic simulation device and method thereof of a super and extra high voltage controllable magnetic control shunt reactor, wherein the dynamic simulation device is capable of accurately simulating magnetic control shunt reactors with different capacities in 500kV, 750kV and 1,000kV power transmission systems. A simulation body consists of three single-phase magnetic control reactors; each single-phase magnetic control reactor is in a three-column structure; two beside core columns are working iron cores; a main alternating current winding and a direct current control coil are wound on each working iron core; and main alternating current windings on the two iron core columns are connected in parallel and connected to a power grid. Control windings are separated from the main windings so as to ensure the safety and the reliability of the device during work. The main windings are provided with twelve turn-to-turn short circuit taps which can respectively simulate 1-25 percent of turn-to-turn short circuit faults from the high-voltage side and the neutral point side; and the control windings are provided with seven turn-to-turn short circuit taps which can simulate 1-25 percent of turn-to-turn short circuit faults from the neutral point side. The body of the device is provided with a current transformer and a voltage transformer on a primary side, which are used for meeting the requirement for protecting a reactor body in a dynamic simulation test.

The invention relates to the technical field of artificial environment simulation, and particularly relates to a programmable precision artificial climate box. The artificial climate box comprises a box body, and the box body is of a multi-layer structure and comprises an experiment layer, an interlayer and an equipment layer from top to bottom in sequence, wherein a separation plate is arranged between the experiment layer and the interlayer, and the interlayer is of a double-channel structure and comprises a first channel and a second channel; the artificial climate box also comprises a simulation system, wherein the simulation system is arranged in the interlayer and the equipment layer and is used for adjusting the internal environment of the artificial climate box; and the artificialclimate box further comprises a program control system, wherein the program control system is arranged in the equipment layer and is used for detecting environmental data in the artificial climate boxand controlling the simulation system. The double-channel structure is adopted in the artificial climate box, so that the problem of temperature and humidity fluctuation caused by low-temperature low-dew-point continuous operation is effectively solved, and the temperature and humidity control precision of the climate box can be effectively improved. Through the match of the program control system, the advantages of energy conservation, economical practicability, wide range and high precision can be achieved.

The invention discloses a flow field visual measurement experimental device based on matched index of refraction. The device comprises a main loop system, a first cooling loop system, a second coolingloop system and a bypass branch. The bypass branch divides the main loop system into a first part and a second part, the first cooling system is located at the first part, the second cooling loop system is located at the second part, and the first part includes a liquid tank, a conventional centrifugal main pump and a main heat exchanger, the first cooling system also includes a main heat exchanger, the first cooling system takes away the heat generated by working of the conventional centrifugal main pump on fluid through the main heat exchanger so as to control the temperature of the main loop system, the second part includes an electromagnetic flowmeter and a test section, the second cooling loop system is set between the electromagnetic flowmeter and the test section, and the second cooling loop system is set for controlling the fluid temperature of the test section, and the bypass branch regulates the flow passing through the test section.

The invention belongs to the technical field of animal models of diabetes mellitus, and particularly relates to a modeling method for an animal model of type 2 diabetes mellitus. The method comprisesthe step that 20-100 lumens and 8-10 hours of illumination is applied during nighttime animal sleep for induction, wherein the induction time is 2-6 month. The method provided by the invention fills the blank of modeling of the animal model of the type 2 diabetes mellitus by a natural induction method, shortens the modeling time of the animal model, and has fewer side effects; and the problems such as too serious obesity and too high mortality of individuals do not easily occur, and feeding costs are greatly reduced.

The invention discloses an artificial massive rapid propagation technical method for brownbanded encarsia formosa which sequentially comprises the steps of nursery stock purchasing, culture solution preparation, leaf cuttage and water culture, aphid inoculation, aphid culture, bee breeding in a bee breeding room, chalcidoid propagation, stiff aphid collection and adult bee collection, wherein parasitic wasp is encarsia formosa. According to the invention, about 20 days are needed from nursery stock purchasing to harvesting of adult chalcidoid, 200-220 thousand chalcidoids can be bred, and thechalcidoid can also be bred in batches according to a plan. According to the breeding method disclosed by the invention, a massive insect source can be provided for provinces or cities with severe aphid damage, so as to relieve the harm of aphid to crops and lower economic loss. The invention not only provides a rapid propagation method of brownbanded encarsia formosa, but also provides a collecting method of brownbanded encarsia formosa stiff aphid and adult bees, and provides a complete production process for commercialized production of parasitic wasp brownbanded encarsia formosa for the first time, and thus providing a massive natural enemy resource for biological control of aphid.

The invention discloses a plasmid transforming method and relates to the fields of molecular biology and genetic engineering. The plasmid transforming method comprises the steps as follows: target exogenous plasmid and a competence host cell with an ygiZ gene knocked out are mixed. The ygiZ gene of the host cell is knocked out, so that the transforming rate is increased. The method has the characteristic of high transforming efficiency for large plasmid. Compared with wild type host cells, the host cell with the ygiZ gene knocked out has the transforming efficiency improved by 2.05 times for plasmid pUC19, 2.60 times for pET-32a and 1.67 times for plasmid p1304. The method greatly improves the plasmid transforming efficiency and has very great significance in the molecular biology field and the genetic engineering field.

The invention relates to a heat insulation experiment bin and a thermal runaway experiment method.The heat insulation experiment bin comprises a bin body, a heating device, at least one first temperature sensor and at least one second temperature sensor, the bin body comprises an inner shell and an outer shell, and an interlayer cavity is formed between the outer shell and the inner shell; the inner shell is provided with an experiment inner cavity, the experiment inner cavity is configured to be used for placing a target object, the bin body is provided with a bin opening communicated with the experiment inner cavity, the bin opening is provided with a bin door, a heating device is arranged in the interlayer cavity, at least one first temperature sensor is arranged in the experiment inner cavity, and a second temperature sensor is arranged in the experiment inner cavity. The first temperature sensor is configured to be used for acquiring temperature information of a target object, the at least one second temperature sensor is arranged in the experiment inner cavity, and the second temperature sensor is configured to be used for acquiring environment temperature information of the experiment inner cavity. Therefore, the thermal runaway scene can be effectively simulated, and the existing experimental research requirements are met.

The invention discloses a marine leakage type natural gas hydrate reservoir forming simulation experiment device and method based on a geotechnical centrifuge. The experiment device comprises a geotechnical centrifuge, a hanging basket assembly and a rotary arm carrying equipment assembly. The hanging basket assembly is hinged to one end of a geotechnical centrifuge rotary arm through a hanging basket connecting shaft and comprises a natural gas hydrate-containing soil body sample, a fixing component of the natural gas hydrate-containing soil body sample, a high-pressure bin, a water bath jacket and the like, and the rotary arm carrying equipment assembly is fixedly arranged on the geotechnical centrifuge rotary arm and used for achieving hydrate reservoir forming temperature control, gassource supply and data acquisition. According to the device and the method, a gravity field is simulated by centrifugal acceleration generated by high-speed rotation of a centrifugal machine in a laboratory to increase buoyancy; and on the premise that the gas flux is not changed, rapid and efficient simulation of the natural gas hydrate reservoir forming process under the buoyancy-controlled gasleakage condition is achieved, the limitation of an existing gas micro-flux supply technology is skillfully avoided, and the leakage type natural gas hydrate reservoir forming process is closer to theactual situation of a natural field.

The invention discloses an electronic cigarette atomization core tobacco juice consumption rate test system, which comprises a ten-thousand-minute balance used for weighing the weight of an atomization core and tobacco juice; the atomizing core fixing device is used for accommodating an atomizing core and cigarette liquid; the gas generating device is communicated with the atomizing core fixing device through a pneumatic pipe and is used for introducing suction airflow into the atomizing core fixing device; the flow meter is arranged on the pneumatic pipe and is used for reading the flow of gas introduced into the atomizing core fixing device by the gas generating device; the power supply is connected with the atomizing core through a wire and is used for supplying power to an electrified electrode of the atomizing core; and the timing stopwatch is used for calculating the power-on suction time. The invention further discloses a method for testing the consumption rate of the cigarette liquid of the atomization core of the electronic cigarette. The method has the beneficial effects that the consumption rate of the cigarette liquid in the atomization core can be simply, conveniently and quickly tested with relatively high precision.

The invention discloses a decapsulated egg drying device. The device comprises a tank body, a stirring device and an air blower, wherein the air blower is detachably connected to the bottom of the tank body through an elbow connector, the stirring device is arranged in the tank body, and a filter net is arranged between the bottom of the tank body and the elbow connector; the lower middle portion of the side face of the tank body is provided with a sampling port and a cover body opened and closed through a buckle, and a rotary handle is connected to the upper end of the stirring device in a bendable mode. The device has the advantages of being simple in structure, convenient to use, and capable of meeting the requirements of general experimental studies in a laboratory, controlling the humidity of a small number of worm eggs and facilitating scientific research.