77results about How to "Active guidance" patented technology

The invention discloses a combined container type gas flow detection device by the pVTt method. The gas flow detection device comprises two or more standard containers, a buffer container I, an intelligent collecting system and a control system. Each standard container is provided with an inlet end valve, a valve for combination and selection and an outlet end valve. Inlets of the outlet end valves serve as installation ports of detected flow meters. All the valves for combination and selection are mutually communicated. The outlet end valves are communicated with the buffer container I. The intelligent collecting system collects pressure p, temperature T and inflating time t in the standard containers before inflating and after inflating and pressure p, temperature T and inflating time t at installation ports of the detected flow meters. The control system is used for controlling all the valves to be opened or closed. According to the combined container type gas flow detection device by the pVTt method, the standard containers are adopted to be independently or randomly combined into different standard containers, and a working gas source and a pressure, temperature and time collecting system are shared. The range of detection flow is enlarged by more than 2n-1 times compared with a single container in the prior art, wherein n is the number of the containers. In this way, installation cost is greatly lowered, and detection efficiency is improved.

Provided is a method for evaluating dangerousness of water inrush from a coal floor. The method is characterized in that a principle component analysis method and a GIS space analysis method are combined, the influence factors and indexes of water inrush from the coal floor are graded in sequence, the basic data of the 17 graded indexes are obtained, R and S type principle component comprehensive analysis is carried out on the basic data, master control factors are screened out, a water inrush dangerousness evaluation formula is built according to the determined master control factors, master control factor thematic maps are built according to the GIS space analysis method, finally, all the thematic maps are overlapped according to the water inrush dangerousness evaluation formula, and a thematic map of the dangerousness of water inrush from the coal floor is obtained so that the dangerousness of water inrush from the coal floor can be evaluated accurately, reliably and quantitatively. The method has the advantages of being quantitative, visualized and the like, scientific bases can be provided for actual production, and the realistic positive guiding function on coal mine safety production is achieved.

The invention discloses a method for cooperatively degrading organic matters by visible light photoelectric-Fenton. According to the method, a visible light photoelectric-Fenton system formed by visible light, photocatalysis and electric-Fenton is used and the organic matters are put into the system to be degraded. The method comprises the specific steps of (1) preparing a mesoporous TiO2 thin film electrode; (2) forming the visible light photoelectric-Fenton system; and (3) degrading the organic matters. According to the method, a photocatalysis technology, a photoelectric oxidization technology and a Fenton oxidization technology are combined and the visible light is introduced to form the visible light photoelectric-Fenton system; the self-made mesoporous TiO2 thin film electrode is used in the visible light photoelectric-Fenton system to realize the mutual cooperative effect of the photocatalysis and the electric-Fenton under the visible light, so that the treatment effect on organic pollutants by the whole system is improved.

Embodiments of the application provide a method and a device for predicting DAU (Daily Active User). The method comprises the steps of: determining to predict DAU of a target product on an Nth onlineday; acquiring DNU (Daily New User) of the target product from the first online day to the Nth online day; determining a daily new retention rate of the target product from the first online day to the(N-1)th online day according to at least two preset retention rate prediction functions; and determining the DAU of the target product on the Nth online day according to the DNU from the first onlineday to the Nth online day as well as the daily new retention rate from the first online day to the (N-1)th online day. In the method of the embodiment of the application, it is considered that as time goes on, in different time periods of a service life of the product, attenuation degrees of the actual retention rates in the different time periods are variable, thus different retention rate prediction functions are generated for the different time periods of the service life of the product, so as to provide an accurate statistical algorithm for predicting the DAU, thereby accurately predicting the DAU.

The invention relates to a production method of an inorganic compound, in particular to a production method of industrial calcium chloride. The industrial calcium chloride is prepared by using shellsand hydrochloric acid as raw materials in a molar ratio of 1:2 to react and then performing filtration and crystallization. The reaction equation is as follows: CaCO3 + 2HCl = CaCl2 + H2O + CO2. The synthetic technological route of the invention is simple, the process has the advantage of no pollution and complete resource utilization, the secondary pollution is less in production process, the leakage of dust is low and the whole production process is environmentally friendly and controllable. Especially shells are used as raw material so as to greatly solve the treatment problem of the shellswaste, avoid the ecological environment pollution caused by waste landfill treatment, have an active role in guiding the waste treatment method of the aquiculture in china and have outstanding environmental friend. The prepared carbon dioxide is needed to recycle, thus avoiding the atmospheric pollution caused by the carbon dioxide emission and further producing economic benefit and creating higher value.

The invention discloses a selection method used for improving seashore salt-affected soil plants, which belongs to the field of plant propagation and cultivation. The method is characterized by implementing the selection of the plants by the following steps of: simulating environment conditions and determining gradient numbers of salt concentrations and experimental salt baths; in a selected season, moving containers in which 41 plant seedlings are respectively planted into the salt baths filled with 30cm depth of salt solution of respective salt concentration, wherein the bottoms of the containers are provided with water permeable holes, and supports of the containers 4cm below the salt solution surface are arranged in the salt baths; determining salt content periodically at intervals; adding water or salt according to set salt concentrations; and performing a salt tolerance experiment for 60 days. The method has the advantages that: salt resistance and salt resistance limit data of the 41 plants in the experiment are acquired; data with comparability is provided for the selection for improving the seashore salt-affected soil plants; and an optimal plant selection is provided for improving the seashore salt-affected soil plants. The method also has the advantages of simple and convenient operation, low cost, large scale popularization and application, and active directive function.

The invention relates to a shaft furnace burden breathability test device and a test method. The device comprises a sample fixing unit, a load weight, a sensor unit, a computer system and an electric heating furnace. The sample fixing unit comprises a shaft furnace reaction tube, a grid pore plate, an alumina ball and a porous graphite plate. The grid pore plate is arranged at the bottom of a sample to be tested in the shaft furnace reaction tube, and the alumina ball is arranged between the grid pore plate and the sample to be tested; the porous graphite plate is arranged on the upper part of the sample to be tested in the shaft furnace reaction tube; the electric heating furnace is arranged on the outer side of the shaft furnace reaction tube; the sensor unit comprises a thermocouple and a differential pressure transmitter, and the computer system is connected to the signal output end of the differential pressure transmitter. According to the invention, the permeability of furnace burden can be tested, and also the reduction process of the furnace burden can be analyzed. The device is simple, the parameters of a test process are easy to adjust, and a positive guiding effect on actual production is realized.

The invention relates to the crossing field of aerodynamics, experimental fluid mechanics, aeroacoustics and structural dynamics and discloses a wind tunnel experiment simulation method for cavity flow-induced vibration and flow-induced noise coupling characteristics. The method comprises the following steps of establishing a cavity flow-induced vibration and flow-induced noise coupling characteristic control equation and boundary conditions by using an equation analysis method; converting the physical quantity parameters with dimensions into a similarity criterion data set of the physical quantity parameters without dimensions, and performing wind tunnel experiment model design, incoming flow condition selection and wind tunnel experiment result data correction based on the similarity criterion data set. The defect of the research capability of the cavity flow-induced vibration and flow-induced noise coupling characteristic problem in the prior art is effectively overcome. Completeness of wind tunnel experiment simulation parameters, effectiveness of an experiment data correction method and wind tunnel experiment simulation precision are ensured. Mutual influence rules among experimental results are effectively obtained; and the influence of cavity structure vibration can be simulated, so that the wind tunnel experiment simulation capability of the cavity configuration aircraft part is improved.

The invention discloses a cement combination semi-finishing grinding optimization control system. The cement combination semi-finishing grinding optimization control system comprises a data acquisition subsystem, a data analyzing subsystem, a DCS control subsystem, and a centralized control subsystem. The data acquisition subsystem is used to acquire parameters of cement production key equipment in DCS and particle size parameters analyzed and processed by a particle size analyzer. The data analyzing subsystem is used to determine whether cement particle size distribution is reasonable according to data acquired by the data acquisition subsystem, and according to the cement particle size distribution condition, the cement production key equipment is selected to be adjusted, so that the cement particle size tends to be normal, and by using the data analyzing subsystem, the adjusting amplitude of the cement production key equipment is provided. The cement key equipment is adjusted by the DCS control subsystem according to a result acquired by the data analyzing subsystem, and therefore objects of reasonable cement particle size distribution and stable quality are achieved. The invention also provides a cement combination semi-finishing grinding optimization control method.

The invention discloses a method for analyzing lithofacies of powder samples, which comprises six steps of mounting, coarse grinding, fine grinding, polishing, etching and petrographic analysis, wherein powder samples are added into adhesives to be made into a bulk shape, the adhesives are used to adhere powder cement together to be made into the bulk shape, and powder is powder clinker or cement. The method for analyzing lithofacies of powder samples is substantially used to analyze the lithofacies of the powder samples, solves the problem in the prior art that just bulk materials are analyzed, and has the advantages that the method for analyzing lithofacies of powder samples is simple in operation and has great guiding significance to productive process.

The invention discloses a stress-resistant gene SiRLK35 of setaria italica L.Beauv. as well as encoding protein and an application. Receptor-like protein kinase SiRLK35 is separated from setaria italica L.Beauv., the nucleotide sequence of the receptor-like protein kinase SiRLK35is shown in SEQ ID NO.1, and the gene encoding protein product belongs to serine / threonine protein kinase. The expression pattern of the gene in a stress condition is researched, the prokaryotic expression vector of the gene is established, the gene can be expressed in the protein level as is verified, the functions of the gene are primarily verified with a dot assay through a gene prokaryotic expression system, meanwhile, the growth curve of the gene under a salt treatment condition is detected, the gene is heterologously transformed into rice, a corresponding transgenetic plant is obtained, the functions of the transgenetic plant in salt resistance and stress resistance are identified primarily, targeted quality and character improvement on setaria italica L.Beauv. is further performed purposefully, the new stress-resistant germplasm of setaria italica L.Beauv. is innovated, and a guidance function is performed.

The invention discloses an intermittent power station dispatching evaluation method, which comprises the following steps: 1, evaluation indexes for the intermittent power station are selected, whereinthe selected grid-connected performance evaluation indexes are divided to three dimensions: a power prediction index, a power station operation technical level index and a power station grid-connected level index; 2, a moment estimation optimization algorithm is used to perform weight calculation and distribution on the three dimensions of evaluation indexes; and 3, according to the weight distribution in the second step, an intermittent power station dispatching index evaluation model is built, and evaluation scoring is carried out; and through building a new energy grid-connected dispatching sequence evaluation model and with the help of the moment estimation optimization algorithm for weight distribution, the grid-connected performance of each power station is ranked, and on the basis,the power limiting capacity share of each new energy station can be distributed rationally. A positive guiding role is played to enhance the intermittent power station operation technical level.

The invention discloses a preparation method of carbon aerogel containing double metal sites and application of an aluminum-air battery. The aerogel takes gelatin as a monomer, silicon dioxide as a hard template and an iron / copper-phenanthroline complex as a hydrogel precursor synthesized from a nitrogen source and a metal source; the preparation method comprises the following steps: carrying out freeze drying, high-temperature pyrolysis and acid pickling to obtain iron and copper double-site-doped carbon aerogel, and meanwhile, due to the fact that the carbon aerogel has rich three-dimensional wrinkles, a porous structure and active double metal sites, the carbon aerogel shows excellent oxygen reduction (ORR) electrocatalytic activity under alkaline and neutral conditions. The performance of a neutral aluminum-air battery assembled by taking the carbon aerogel as a positive electrode is obviously superior to that of a commercial Pt / C electrocatalyst, so that the catalyst prepared by the invention has potential guiding significance for research, development and production of a non-corrosive flexible wearable metal-air battery.

The invention discloses an educational resource sharing system based on big data. The educational resource sharing system includes a college information module which generates teacher resource data tobe stored; a middle and primary school information module which generates course teacher data; the college information module being in communication connection with the middle and primary school information module, so that students in colleges or middle and primary school course teachers who register successfully share the teacher resource data and course teacher data; an education receiver module which generates student data; the education receiver module being in communication connection with the college information module and middle and primary school information module, so that middle andprimary school students who register successfully share the teacher resource data and course teacher data; and an analysis module which matches the teacher resource data with student data to generatematched data, so that the students in colleges perform on-line supervision on the matched middle and primary school students.

The invention discloses an education resource sharing platform based on big data, and the platform comprises a college and university information module which collects the information of students in colleges and universities; a middle and primary school information module which collects the information of teachers of each class of the middle and primary schools; a student module which collects theinformation of students of each class of the middle and primary schools; and an analysis module which is in communication connection with the college and university information module, the middle andprimary school information module and the student module, carries out the matching of the teacher resource data and student data, and generates matched data, wherein the matched data is transmitted to the middle and primary school information module. A registered middle and primary school teacher carries out the analysis and confirmation of the matched data, and a matching scheme between the students in colleges and universities and the students in middle and primary schools, so as to enable the students in colleges and universities to carry out the online supervision of the students in middle and primary schools.

The invention belongs to the technical field of crop planting and fertilizing methods, and particularly relates to a determination method, correction method and method for designing a rice fertilization formula of a nitrogen nutrient fertilization reduction model based on a controlled-release fertilizer. According to the method, through a large number of field trials, the inventor finds a balancepoint between the controlled-release fertilizer application proportion and the nitrogen nutrient application reduction proportion for the first time under the condition that the rice yield is not reduced, and systematically proposes a mathematical relationship model between the controlled-release fertilizer application proportion and the nitrogen nutrient application reduction proportion. According to the nitrogen nutrient application reduction model based on the controlled-release fertilizer, enterprises or grain farmers can be guided to formulate an application reduction scheme according tolocal conditions and self actual conditions, the matching amount and the fertilization formula of the controlled-release fertilizer and common fertilizer for rice are reasonably designed under the condition of application reduction, and the method is simple and convenient to operate. According to the method, the formula can be designed according to local conditions, the utilization rate of the fertilizer is increased, the investment cost can further be greatly reduced, and environmental pollution is reduced.

The invention provides a natural gas hydrate saturation estimation method and system. The method comprises the following steps: acquiring logging data and elastic parameters of a stratum to be measured; respectively calculating a predicted longitudinal wave velocity and a predicted transverse wave velocity of the stratum to be measured; when the error between the predicted longitudinal wave speed of each depth point of the water-saturated layer section and the actually measured longitudinal wave speed of the water-saturated layer section and the error between the predicted transverse wave speed and the actually measured transverse wave speed of the water-saturated layer section are both minimum, determining the critical porosity and the coordination number at the critical porosity; and recalculating the predicted longitudinal wave velocity and the predicted transverse wave velocity of the stratum to be measured, estimating the first hydrate saturation of each depth point according to the recalculated predicted longitudinal wave velocity, estimating the second hydrate saturation of each depth point according to the recalculated predicted transverse wave velocity, and obtaining the hydrate saturation. The method is high in estimation accuracy, and has a positive guiding effect on hydrate reservoir reserve evaluation and subsequent exploration and development.

The invention belongs to the technical field of numerical control machining, and discloses a process control numerical control machining technology card design method. The method comprises numerical control technology procedure cover design, numerical control procedure preparing card design, numerical control procedure card design and numerical control technology checking card design. According topreparing card design before numerical control machining, confirmation and arranging are conducted for equipment, tools, gauges, clamps, components and numerical control machining zero point setting,the technology operability is greatly improved, and a foundation is laid for further guaranteeing of the numerical control machining quality; and through numerical control machining preparing card and inspection rate design, operability and examinability of the numerical control machining technology are further improved, and a positive guidance function is achieved for effectively guaranteeing the numerical control machining quality.

The invention relates to a peach auxin primary response factor gene PpIAA1 and application thereof. The PpIAA1 gene is cloned from peach fruits, and the PpIAA1 gene is further stably transformed intoMicro-Tom tomatoes for functional verification. The results show that compared with wild tomatoes, root branches of PpIAA1 transgenic strain plants are decreased, the leaf color is obviously green, fruits are ripened in advance and the shelf life is shortened. And the mature period of the tomato fruits of the PpIAA1 transgenic strain is advanced by 6-8 days. The expression of the PpIAA1 is significantly inhibited by 1-MCP treatment of 'middle nectarine No. 13'. The expression of the PpIAA1 is significantly promoted by NAA or ethylene treatment of 'middle nectarine No. 16', indicating that thegene plays an important role in the ripening and softening process of peach fruits. The screened PpIAA1 gene can be helpful for researching the response mechanism that auxin and ethylene together promote the ripening of peach fruits in the ripening period of the peach fruits.

The invention relates to a production method of an inorganic compound, in particular to a production method of industrial calcium chloride. The industrial calcium chloride is prepared by using shells and hydrochloric acid as raw materials in a molar ratio of 1:2 to react and then performing filtration and crystallization. The reaction equation is as follows: CaCO3 + 2HCl = CaCl2 + H2O + CO2. The synthetic technological route of the invention is simple, the process has the advantage of no pollution and complete resource utilization, the secondary pollution is less in production process, the leakage of dust is low and the whole production process is environmentally friendly and controllable. Especially shells are used as raw material so as to greatly solve the treatment problem of the shells waste, avoid the ecological environment pollution caused by waste landfill treatment, have an active role in guiding the waste treatment method of the aquiculture in china and have outstanding environmental friend. The prepared carbon dioxide is needed to recycle, thus avoiding the atmospheric pollution caused by the carbon dioxide emission and further producing economic benefit and creating higher value.

The invention discloses a boundary layer similar parameter simulation method for accurately predicting a cavity flow acoustic load. The boundary layer similar parameter simulation method comprises the following four steps: extracting incoming flow boundary layer characteristic parameters, determining incoming flow boundary layer similar parameters, simulating the incoming flow boundary layer similar parameters and simulating the range of the incoming flow boundary layer similar parameters. Starting from aerodynamics, acoustics and experimental fluid mechanics simulation principles, the method provides a theoretical basis for constructing cavity flow acoustic load to accurately predict incoming flow boundary layer parameter simulation, and has a positive guiding effect on cavity flow acoustic load ground wind tunnel test to measure incoming flow boundary layer parameter simulation, so that the research efficiency can be improved, an incoming flow boundary layer similar parameter simulation range suitable for cavity flow acoustic load prediction is given, a supporting effect can be provided for accurately obtaining cavity flow acoustic load test data, the method is closer to an actual problem of a cavity on an airplane in a real environment, and the simulation capability of the cavity flow acoustic load prediction problem is improved.

The invention relates to a linear shrinking percentage test method for room temperature vulcanization of liquid silicone rubber. The method is characterized in that a mold is provided with a placement trough for placing the rubber, wherein positioning holes are formed in one end of the placement trough. According to the method, the positioning holes are formed in one end of the placement trough, so that solidified liquid silicone rubber is lightly lifted up from one end, which is not provided with the positioning hole, of the placement trough to the positions of the positioning holes after the liquid silicone rubber is solidified, then is flatly placed in the placement trough and is subjected to length width measurement, and the length and the width of the liquid silicone rubber are compared with the length and the width of the placement trough and are calculated to obtain the linear shrinking percentage. The test method provided by the invention meets the selection requirement of mold opening and can be adaptive to the requirements of the molds with different sizes; an obtained result is good in repeatability, the evaluation is accordant with the requirement of the mold; the test method has a positive guiding function to the production and is worthy of major popularization.

The invention discloses a method for cooperatively degrading organic matters by visible light photoelectric-Fenton. According to the method, a visible light photoelectric-Fenton system formed by visible light, photocatalysis and electric-Fenton is used and the organic matters are put into the system to be degraded. The method comprises the specific steps of (1) preparing a mesoporous TiO2 thin film electrode; (2) forming the visible light photoelectric-Fenton system; and (3) degrading the organic matters. According to the method, a photocatalysis technology, a photoelectric oxidization technology and a Fenton oxidization technology are combined and the visible light is introduced to form the visible light photoelectric-Fenton system; the self-made mesoporous TiO2 thin film electrode is used in the visible light photoelectric-Fenton system to realize the mutual cooperative effect of the photocatalysis and the electric-Fenton under the visible light, so that the treatment effect on organic pollutants by the whole system is improved.

The invention relates to the technical field of child teaching, and particularly relates to a child math teaching tool based on a game. The child math teaching tool based on the game comprises a chessboard, grid lines, chesses and protection plates; both upper and lower end faces of the chessboard are rotationally connected with fixing devices; collection boxes are arranged at both left and rightsides of the fixing devices; the outsides of the collection boxes are in sliding connection with the chessboard; four corners of the chessboard are fixedly connected with the protection plates; both left and right end faces of the chessboard are in sliding connection with sliding mechanisms; the chesses uniformly distributed are arranged on the front end face of the chessboard; and the top left corner of the front end face of the chessboard is rotationally connected with a rotation device. In the invention, by the arranged chessboard, grid lines and chesses, teaching and the game are integrated, and teaching tasks are completed in the game so as to bring benefits to children; the child math teaching tool based on the game can be used as a separate teaching tool, is convenient for teaching,can be used for one single person to practice, also can be used for two people to compete and practice; and the game is a longitudinal and transverse thinking observation number game and takes a positive guiding effect on early macroscopic observation of children for things.

The invention discloses a method for promoting rapid production recovery of lodging mature macadimia trees after typhoon disasters. The method comprises the following steps: (1) dredging ditches and draining accumulated water; (2) conducting pruning, and applying chemicals to saw bites; (3) supporting trees and promoting rooting; (4) conducting trimming and shaping tree forms; (5) carrying out managing and recovering production. According to the method, new roots can quickly grow from injured root systems of the lodging mature macadimia trees, rapid healing of wounds is realized, dormant budsgerminate again to obtain sprouted branches, and fast recovery of the trees is realized; blossoming and fruiting at a small scale can be achieved in the second year after the typhoon disasters, high-yield tree forms are basically formed in the third year after the disasters, production is recovered, and average plant yield is 10 kg or above; and thus, rapid production recovery of the mature macadimia nut trees lodging after the typhoon disasters is effectively achieved, losses are reduced, and a positive guiding effect is achieved for fruit tree production recovery after the typhoon disasters.

The invention discloses a cavity multi-field coupling equation and a boundary condition establishing method. A cavity multi-field coupling boundary condition is established based on a cavity flow control equation, a cavity noise control equation and a cavity structure vibration control equation. The method has the advantages that the method starts from basic principles of hydrodynamics, aeroacoustics and structural dynamics, and establishes the multi-field coupling equation of cavity flow / vibration / noise, and can ensure the correctness of the established equation fundamentally; based on the coupling characteristics of the cavity flow, vibration and noise, the cavity multi-field coupling boundary condition is established, which is beneficial for grasping the essence and key parameters of cavity multi-field coupling problems, the method has positive guidance for experimental and numerical researches of cavity type problems, and the research efficiency can be improved; the cavity multi-field coupling equation and the cavity boundary conditions are established in consideration of vibration problems of a cavity structure, which makes a research model closer to actual cavity problem, thereby improving the simulation ability of the cavity type problems.

The invention discloses a small-channel parallel pipeline heat exchanger with fins. The heat exchanger comprises an inlet pipe, parallel pipelines and an outlet pipe, wherein the parallel pipelines communicate with the inlet pipe and the outlet pipe correspondingly, the fins are arranged on the parallel pipelines, at least one row of the parallel pipelines are arranged, and when the value range ofthe outer diameter d<o> of the parallel pipelines is that d<o> is larger than 1 mm and smaller than or equal to 3.95 mm, a calculation formula between the heat exchange amount of the heat exchanger and the structure of the heat exchanger is provided. According to the technical scheme, the heat exchanger has the following beneficial effects that the heat exchanger is high in heat exchange efficiency, low in noise and capable of saving energy.

The invention discloses a large data-based extracurricular group tutoring and supervision platform, which includes: a college information module, which collects student information of college students through registration to generate a counselor resource database; an information module for primary and secondary schools, which Collect the information of teachers in each class through registration to generate a resource database for teachers; the university information module is connected to the information module of primary and secondary schools; Primary and secondary school information modules are connected; the analysis and recommendation module is connected with the university information module and the primary and secondary school information modules respectively, and analyzes and matches the students in the counselor resource database and the teacher resource database to generate a matching plan; the teacher sends the matching plan to To the students to be tutored in the information module of the trainees, to form the extracurricular tutoring mode of college students, teachers and primary and secondary school students to be tutored.

A teaching demonstrator capable of measuring positive and negative conductivities belongs to the field of demonstration of teaching apparatuses. The demonstrator is composed of a switching stage, a negative electricity identification stage, a negative electricity amplifying stage, a negative electricity display amplifying stage, a negative electricity cursor and voice indication stage, a positive electricity identification stage, a positive electricity amplifying stage, a positive electricity display amplifying stage, a positive electricity cursor and voice indication stage, an oscillation stage and a display stage; the switching stage comprises a changeover switch, a test rod interface and a testboard; when a measured object is connected to the switching stage, the negative electricity identification stage and the positive electricity identification stage identify positive and negative charges, after amplification, the cursor and voice indication stages are started according to the weakness of the charges, the display amplifying stages start the corresponding display stages, and the magnitude of energy is reflected accurately via the display stages and the cursor and voice indication stages. A multi-display effect is realized, teenagers can known the conductivity condition and understand concepts and meanings of conductors, resistors and insulators, and the demonstrator can be popularized widely in schools.

The invention discloses a method for promoting rapid production recovery of adult macadamia nut trees that fell down after a typhoon disaster. The method of the invention includes: (1) dredging ditches and removing stagnant water; Help the tree to promote rooting; (4) trim and shape the tree; (5) manage and restore production; the injured root system of the fallen macadamia tree can quickly grow new roots, the wound can be quickly healed, and the dormant buds can be regenerated The branches sprouted and the tree body recovered quickly. A small amount of flowers and fruits could be produced in the second year after the typhoon disaster. In the third year after the disaster, a high-yield tree shape was basically formed and production resumed, achieving an average plant yield of more than 10kg, thus effectively realizing lodging in Australia after the typhoon disaster. Nut adult trees quickly resumed production and reduced losses, which played a positive role in guiding fruit trees to resume production after the typhoon disaster.