37results about How to "Low experimental requirements" patented technology

The present invention relates to a controllable preparation method of a nitrogen-doped porous carbon-supported metal monoatomic material, and belongs to the technical field of material science and engineering. According to the present invention, porphyrin and a metalloporphyrin are polymerized through a polymerization reaction. The proportions of the porphyrin and the metalloporphyrin are regulated to regulate a metal content (0.06-4.00wt%), and monoatomic metal types (A type, AB type, ABC type) are regulated by regulating different types of metalloporphyrins. According to the present invention, controllable preparation of a metal monoatomic material is realized with good expansibility and reproducibility; meanwhile, the problems of low metal content, few types and the like in the prior art are solved, and researches in the related fields such as the synthetic methodology of metal monoatomic materials and the like.

The invention relates to the field of microbiological detection, in particular to a method and a device for microbiological analysis of a host sample. The method comprises the following steps: (1) performing first filtering processing on a sequencing data set from a host sample by adopting a host genome database so as to remove sequencing data which can be compared with the host genome database from the sequencing data set; (2) performing second filtering processing on the sequencing data set by adopting a homologous database so as to remove the sequencing data which can be compared with the homologous database from the sequencing data set; and (3) comparing the sequencing data set subjected to the first filtering treatment and the second filtering treatment with a microbial genome database so as to determine microbial sequencing data from the microorganisms in the sequencing data set. By applying the method and the device provided by the invention, rapid and accurate analysis and detection of microorganisms in a host can be realized.

A method for using vallisneriaceae to treat the nutrients-enriched water in lake includes cultivating vallisneriaceae, adding it to lake bottom, making it adapt the lake water for 3-5 days, and adding vallisneriaceae protecting agent and seaweeds growth inhibitor.

The invention discloses a grinding device for a biological tissue. The grinding device comprises a grinding table with a mechanical transmission case, wherein the grinding table is provided with a grinder, the grinder comprises a pair of base and upper cover, which are identical in shape and size, a plurality of concaved grinding cavities which are regularly arranged are formed in the upper surface of the base, each grinding cavity is in a semicircular ball-socket shape or a semi-elliptic ball-socket shape, and a circular grinding ball is arranged in each grinding cavity; a plurality of concave cavities with quantity identical to that of the grinding cavities of the base are formed in the upper surface of the upper cover, the concave cavities correspond to the grinding cavities of the base in position distribution, when the upper cover is turned to be connected with the base, the concave cavities of the upper over and the corresponding grinding cavities of the base are closed to form a plurality of circular spherical or elliptical spherical closed spaces, the biological tissue and the grinding balls are wrapped by the closed spaces, after the base and the upper cover are fixed by utilizing a clamp, the base is connected to the upper surface of the grinding table through a sliding part, and the upper cover is connected with a drive device in the mechanical transmission case through a crank linkage mechanism; a drawer for storing an ice box is arranged in the grinding table below the grinder.

The invention provides a method for modeling a control object in a cooling process of a central air conditioner, relating to the field of cooling control technologies. The method has the advantages that the modeling accuracy and interference resistance are improved. According to the method, a pulse response curve of the control object is obtained firstly in a measurement manner, a step response curve and a ramp response curve are then obtained, a difference equation is written according to a measurement sample, the proportionality constant, time constant and lag time constant of the control object are obtained by using a least square method, a typical second-order plus lag object model is combined so as to obtain a pulse transfer function, and a difference equation of a control object model is further obtained. According to the method provided by the invention, the requirements for experimental conditions and site environments are low, the method has a filter action, the interference resistance is stronger, the modeling accuracy and reliability are high, and the modeling accuracy can be increased to be less than 3% from 7% compared with that of the conventional ascending curve method.

The invention discloses a method for preparing a monatomic catalyst by atomizing a precursor. The preparation method comprises the following steps: step 1, atomizing and spraying a metal salt solutionto surfaces of different carrier by adopting a spray head to obtain a monatomic catalyst precursor; 2, drying the obtained monatomic catalyst precursor under an infrared lamp; repeating the first step and the second step for a plurality of times, and then putting the monatomic catalyst precursor into a drying box over one night; and finally, carrying out high-temperature roasting on the fully dried monatomic catalyst precursor, and cooling to room temperature to obtain the corresponding monatomic catalyst. The metal salt is dispersed on the surfaces of different carriers by using a simple spraying method, and the metal content is regulated and controlled by regulating and controlling the weight ratio of the metal salt to the carriers; the metal monatomic species are regulated and controlled by regulating and controlling the species of different metal salts; different carriers are selected to regulate and control the types of the carriers; and by regulating and controlling roasting conditions, metal single atoms are tightly combined with defect sites of elements such as oxygen and nitrogen in the carriers, the preparation of the single-atom catalyst is realized.

The invention relates to a control object modeling method, in particular to a control object modeling method for thermal station energy-saving reconstruction. The invention solves the problems of the existing modeling method that the model precision is low; the thermal process lag time can not be identified; complete step response is needed; and that application to energy-saving reconstruction can not be realized. The method of the invention mainly comprises the following steps of: acquiring response curves of unit pulse signals, unit step signals and unit slope signals; acquiring the identification equation from the typical transfer function; identifying unknown parameters of the object model after second-order lag process by using the least square method; acquiring difference equation of the heat supply object after discretization. The modeling method of the invention can supersede the conventional flying-up curve method to obtain high-precision models. Compared with the conventional flying-up curve method, the method of the invention can increase the modeling precision from 7 percent to within 3 percent and directly identify the lag time of the object instead of experimental determination in conventional methods.

The invention discloses a method for preparing a nano ZnO-GO / waterborne polyurethane super-amphiphobic coating through a spraying method. An ultrasonic hydrothermal composite method is adopted, nano zinc oxide is modified through perfluorooctyl trichlorosilane, then the modified nano ZnO carries GO, and nano ZnO-GO composite substance is obtained; a waterborne polyurethane layer is prepare on thesurface of a substrate; then a low-surfacce-energy nano ZnO-GO composite substance layer is established on the surface of the waterborne polyurethane layer; and after coating curing is finished, the surface topography and the static contact angle of a cured coating are tested. By means of the method, the surface energy of the nano zinc oxide is lowered, the surface hydrophobicity and lipophobicityof the nano ZnO-GO composite substance layer after fluoridation treatment are improved, the super-amphiphobic effect is achieved, and the stability of the coating is improved. The method is low in production cost, the preparation method is simple, the requirement for a reaction facility is low, the reaction conditions are mild, no environmental pollution occurs, and large-scale production can beachieved.

The invention discloses carbon nano tube compounded hydrogel for tritium prevention and filtration and a preparation method thereof. The carbon nano tube compounded hydrogel can keep air permeability under the condition of water adsorption and meanwhile has a certain mechanical strength. The preparation method adopts a two-step irradiation method, acrylic acid is successfully grafted to the walls of carbon nano tubes through first-step irradiation, and the problem that the carbon tubes are insoluble in water is solved; gel and the carbon nano tubes are successfully and uniformly compounded together through second-step irradiation, the mechanical strength of the carbon nano tube compounded hydrogel is also accordingly improved, and the air moisture adsorption efficiency is also improved. The method is simple and easy to operate, the doping of other reagents is not needed, and the obtained hydrogel material is purer.

The present invention discloses process of extracting genome DNA of prawn white spot baculovirus. The process adopts disease prawn with white spot as sample, and includes the steps of washing disease prawn with sterilized water, boiling in sterilized water for 8-10 min, adding TN buffer solution and grinding into homogeneous slurry, centrifuging at medium speed, etc to obtain genome DNA of prawn white spot baculovirus. The process is fast, simple and effective.

The invention discloses a simple experimental device for slurry osmosis film formation. The device comprises an experimental system and a pressurization system arranged on one side of the experimentalsystem. The experimental system comprises a support frame with a beam inside, an experimental tube which is arranged on the beam, and a measuring cylinder which is arranged under the experimental tube. The experimental tube comprises a lower end cover fixedly arranged on the beam, a transparent tube in screwed connection with the lower end cover, and an upper top cover which is screwed with the upper end of the transparent tube. The upper top cover is provided with a vent hole. The lower top cover is provided with a water loss hole. The invention further comprises a simple experimental methodfor slurry osmosis film formation. According to the invention, the device and the method have the advantages of simple structure and convenient use, can effectively measure the film thickness and water filtration volume of slurry to the formation layer, realize optimization of reasonable slurry ratio of the formation layer, and are used for evaluating the adaptability of slurry to various formation conditions.

The invention discloses an asynchronously matched measurement equipment-independent quantum key distribution method and system. The key limitation is broken through by using a post-matching method to realize time-phase coded two-photon Bell state measurement, and compared with the existing measurement equipment-independent quantum key distribution, the method provided by the invention can provide a higher security code rate, achieves farther transmission distance; meanwhile, under the condition that the transmission distance is not greater than 490 km, the method can select a short time interval for random matching, so that phase drift caused by channel transmission does not need to be calibrated; under the condition that the transmission distance is not greater than 370 km, rapid active phase locking and frequency locking of the laser are not needed, the experiment requirements are reduced, the safety and the practicability are greatly improved, and the experiment cost is saved.

The invention provides a high-voltage capacitor low-voltage electrode micro-displacement measurement device based on electrode displacement in the field of capacitor voltage coefficient measurement. The device comprises a capacitance bridge, a high-voltage power source, a tilting rotating platform and a CCD high-voltage standard capacitor; the tilting rotating platform comprises an underframe, a tilting bracket, a bracket support, a rotating component, a plurality of bolts, a first motor, a second motor and a control cabinet; and the CCD high-voltage standard capacitor is installed on the tilting rotating platform and tilts and rotates through the tilting rotating platform. The invention further provides four capacitor voltage coefficient measurement methods based on high-voltage capacitorelectrode micro-displacement measurement. The measurement device and method have the advantages that the standard device and the measurement method for high-voltage standard capacitor voltage coefficient absolute measurement are provided, measurement experiment steps are simple and visual, the experimental requirement on high-voltage standard capacitor voltage coefficient absolute measurement isgreatly lowered, and the operability of an experiment is improved.

The invention discloses an agar solution, which comprises agar and alkali, wherein the concentration of agar is 2-3%(w / v), the concentration of alkali is no less than 0.8mol / L. The invention also provides a detection kit including the above mentioned agar solution and a detection method of the kit. The kit is employed for detecting the antibacterial peptide activity, the detection result is accurate and reliable, and the kit has low requirement for the experiment condition, the operation is simple, ordinary people can use the kit, and the practicality is strong.

The invention provides a portable fluorescence microscope based on a smart phone and a working method thereof. The portable fluorescence microscope based on a smart phone comprises a smart phone and aportable fluorescence microscope arranged on the smart phone. The portable fluorescence microscope comprises a fluorescence excitation light source, a collimating lens, a light filter group and an objective lens. The collimating lens is perpendicular to the light emitted by the fluorescence excitation light source. The light filter group is parallel to the collimating lens. The objective lens isperpendicular to the collimating lens. The objective lens is arranged before a sample to be detected. The built-in lens of the smart phone is parallel to the objective lens. The fluorescence excitation light source irradiates the sample to be detected after passing through the collimating lens and the light filter group. The reflected light of the sample to be detected is received by the built-inlens of the smart phone via the light filter group. By using the portable fluorescence microscope of the invention, the microscopic sample fluorescence analysis experiment is greatly simplified, and the high requirement of the conventional microscope for the experimental environments and conditions is lowered. The portable fluorescence microscope is a practical application of the Internet technology and intelligent communication in basic scientific research.

The invention relates to a PIV solid particle generator comprising a tank-shaped upper cover, a middle module and a tank-shaped base; the lower end of the tank-shaped upper cover is open, and a firstcavity is formed in the tank-shaped upper cover; the upper end of the tank-shaped base is open, and a third cavity is formed in the tank-shaped base; the middle module comprises a motor, a motor bracket, a transmission cover, a transmission shaft, a stirrer and a feeding pipe; the transmission cover comprises a convex disc and an annular side plate; the annular side plate is connected with the edge of the convex disc, and the annular side plate and the top surface of the convex disc jointly form a second cavity; the annular side plate is movably and hermetically connected with the tank-shapedupper cover, so that the first cavity is communicated with the second cavity; the tank-shaped base is movably and hermetically connected with the convex disc, so that the stirrer is positioned at thebottom of the third cavity. Compared with the prior art, the whole sealing performance is improved by redesigning the structure of the particle generator, and the particle generator is suitable for small-flow particle stirring application conditions; the experiment requirement is reduced; the safety of use is improved.

The invention discloses a method for preparing a dense electrophoretic coating on a magnesium alloy surface, and belongs to the field of metal material surface treatment. The method specifically includes the following steps that pretreatment is performed on a magnesium alloy; the magnesium alloy surface is subjected to ionic liquid electroplating with aluminum; electrophoretic paint is prepared; and the magnesium alloy surface is coated with the electrophoretic paint. Before coating with the electrophoretic coating, aluminum plating is deposited on the magnesium alloy surface through ionic liquid electroplating, electrophoretic coating is performed on the prepared aluminum plating, the aluminum plating can effectively solve the problems that the magnesium alloy surface is non-uniform in potential and the magnesium alloy is prone to corrosion in an electrophoretic liquid, and thus the prepared electrophoretic coating is denser. According to the method, the production process is simple and efficient, the requirements for the whole experimental process are not high, the prepared magnesium alloy surface is uniform, dense and flat in electrophoretic coating, and the magnesium alloy canbe effectively protected against the harm caused by corrosion. The result of a neutral salt spray test indicates that the magnesium alloy surface is not corroded after being located in the neutral salt spray environment for 500 h, and the electrophoretic coating is complete and free of damage.

The invention relates to an experimental method of liquid flow characteristics in nanochannels for carrying out an experimental study on liquid flow at the sub-micron and nano-scale and being simple and convenient to operate, and solves the problem that the force situation of liquid under the nano-scale is far different from that under the macro-scale (1mm-1m), and the flow rate of the liquid is much larger than that predicted by the traditional theory or much smaller than that predicted by the traditional theory because previous studies in the nanochannels generally use a molecular dynamics simulation method, and the experimental method is seldom used, thereby being not capable of accurately measuring the flow rate of the liquid.

The invention discloses a method for decomposing peroxides in oils. Under the environmental conditions of fully isolating air and oxygen, the oils are kept at a constant temperature of 20°C to 300°C for 300 days to 5 seconds to decompose the peroxides in the oils and reduce the oil content. the peroxide content; the present invention can safely and effectively decompose the peroxide in the oil, reduce the peroxide content of the oil, the final product has low peroxide content, high safety and stability; The requirements for the experiment are not high, it is easy to implement, and the process cost is low, so it can be considered for industrial application and large-scale production.

The invention discloses a salt water concentration stratification characteristic measuring device. A vacuum negative pressure pump is connected with an air chamber, and the vacuum negative pressure pump can form a stable negative pressure in the air chamber through vacuum suction; a pressure relief valve is arranged on the wall of the air chamber Open the pressure relief valve to release the negative pressure in the air chamber; the air chamber is connected to the T-shaped adapter pipe, and the interface between the air chamber and the T-shaped adapter pipe is sealed with epoxy resin cement; the liquid pipe group to be tested is connected to the T-shaped adapter pipe. T-shaped transfer tube connected, the liquid tube group to be tested and the T-shaped transfer tube interface are sealed with epoxy resin cement; the standard liquid tube is a transparent tube marked with a scale, the standard liquid tube is connected with the T-shaped The outside of the interface with the T-shaped adapter pipe is sealed with an epoxy resin-based adhesive. The structure is simple and easy to use. It can measure the concentration characteristics of multi-layer brine at the same time in the process of salt rock water solution cavity building. It uses the principle of pressure balance, which is convenient to obtain materials, low in cost, simple in operation, high in precision, and can be recycled.

The invention discloses a grinding device for a biological tissue. The grinding device comprises a grinding table with a mechanical transmission case, wherein the grinding table is provided with a grinder, the grinder comprises a pair of base and upper cover, which are identical in shape and size, a plurality of concaved grinding cavities which are regularly arranged are formed in the upper surface of the base, each grinding cavity is in a semicircular ball-socket shape or a semi-elliptic ball-socket shape, and a circular grinding ball is arranged in each grinding cavity; a plurality of concave cavities with quantity identical to that of the grinding cavities of the base are formed in the upper surface of the upper cover, the concave cavities correspond to the grinding cavities of the base in position distribution, when the upper cover is turned to be connected with the base, the concave cavities of the upper over and the corresponding grinding cavities of the base are closed to form a plurality of circular spherical or elliptical spherical closed spaces, the biological tissue and the grinding balls are wrapped by the closed spaces, after the base and the upper cover are fixed by utilizing a clamp, the base is connected to the upper surface of the grinding table through a sliding part, and the upper cover is connected with a drive device in the mechanical transmission case through a crank linkage mechanism; a drawer for storing an ice box is arranged in the grinding table below the grinder.

The invention provides a single-crystal indium micron sheet and a synthesis method and application thereof. The single-crystal indium micron sheet is synthesized by a chemical method in an organic solvent. The indium micron sheet synthesized by the invention is composed of single-crystal indium with a thickness of 35-80 nm, a length of 5-50 [mu]m and a width of 0.5-5 [mu]m or 5-50 [mu]m. The synthesis method comprises the following steps: mixing indium salt, citrate and polyhydric alcohol in an inert atmosphere, carrying out heating and dissolving while stirring, then adding a reducing agent borohydride salt at 70-150 DEG C or room temperature for a reduction reaction, and finally, carrying out rapid cooling or directly conducting standing at room temperature to obtain the single-crystal indium micron sheet. According to the invention, a preparation process is simple, one-step wet chemical synthesis is combined with subsequent rapid cooling or direct room-temperature reduction is carried out, experimental requirements are low, and the method is convenient to operate and friendly to environment.

The invention discloses a method and device for fabrication of a frequency degenerate multi-photon entangled source using an integrated waveguide. The method comprises the following steps that (1), two pulsed light beams with different frequencies are obtained; (2), intensity of the two pulsed light beams is amplified; (3), relative time delay of the two pulsed light beams is adjusted to synchronize the two pulsed light beams, and the polarization directions of the two pulsed light beams are adjusted to be consistent; and (4), the two pulsed light beams are introduced into a Sagnac loop, eachpulsed light beam is divided into two beams of light orbiting in different directions and generates photon pairs under the spontaneous four-wave mixing of a third-order nonlinear medium, the pulsed light beams returning from different directions are combined and elicited from the Sagnac loop, and the frequency degenerate multi-photon entangled source is obtained. The method has higher stability and expansibility, can achieve complexity which is difficult to achieve in space optics, and has a high application prospect.