46results about How to "Strong feasibility" patented technology

The invention relates to a pool ecological breeding method for coilia nasus by filling river water to accept fries, and belongs to the technical field of fry accepting and breeding. The method is characterized by comprising the following process steps: (1) selecting a soil pool along the river; (2) using a silk cover net to set a special fry accepting area; (3) when the fry amount reaches 1 to 3 fish per liter, adopting a water pump to accept the fries in time; (4) adopting the measures of pouring soybean milk and throwing ovigerous shrimps by a netlike box to breed natural food organisms; (5) when the temperature of water in the pool is below 10 DEG C, carrying out separation and wild removal operations for advanced fry in the fry accepting pool; (6) adopting the ecological technical measures such as throwing fermented organic fertilizer, stocking juvenile shrimps, breeding silver carp and the like to strictly adjust and control water quality and breed the coilia nasus in a special pool; and (7) breeding the coilia nasus to a period of two winters, and fishing the coilia nasus to sell according to the market demand. The method effectively breaks through the pool breeding problem of the coilia nasus, obtains the coilia nasus which has the same quality as wild coilia nasus, further achieves artificial breeding of the coilia nasus on a deeper level, builds a good ecological environment, and can remarkably improve the survival rate of the fries.

The invention relates to a three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3> / C micrometer flower electrode material and a preparation method and application thereof. The diameter of the three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3> / C micrometer flower electrode material is 5-10 micrometers, the thickness of a carbon-clad NaTi<2>(PO<4>)<3> / C nanosheet subunit is only 1-5 nanometers, mesopores with pore diameters of 2-30 nanometers are formed in the carbon-clad NaTi<2>(PO<4>)<3> / C nanosheet subunit, the thickness of a surface carbon layer is 2-5 nanometers, and the nanosheet subunits are in over joint to form a three-dimensional conductive network. The three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3> / C micrometer flower electrode material has the advantages that the three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3> / C micrometer flower is prepared by a simple and practical solovothermal method combined with a high-temperature calcination method, and is endowed with excellent high rate performance and stable long-circulation capability when taken as a positive electrode active material of a sodium ion battery. The process is simple, the three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3> / C micrometer flower electrode material is high in practicable and is high in safety coefficient, the requirement on a device is low due to the adoption of the solovothermal method and the calcination processing, production can be expanded, and market promotion is promoted.

The invention discloses fermented milk rich in lactobacillus plantarum and a manufacturing method thereof. In the preparation process of the fermented milk, manganese salts and one or two of raw milk, sweeteners, yeast extract and bioactive peptides serve as raw materials. The fermented milk is prepared by fermentation with lactobacillus plantarum and streptococcus thermophilus serving as leavening agents, the inoculation amount of lactobacillus plantarum is 106-107CFU / g, and the inoculation amount of streptococcus thermophilus is 106-107CFU / g. The fermented milk rich in lactobacillus plantarum is rich in nutrition and good in taste, the manufacturing method is simple and practical, content of active lactobacillus plantarum in the fermented milk is high, prebiotics functions of adjusting intestinal flora balance and regulating intestinal tract and the like can be effectively achieved after eating, and the fermented milk has great market application potential and economic value.

The invention discloses a bisphenol A epoxy resin preparation method and a product prepared therethrough. The method comprises the following steps: carrying out a pre-reaction and a ring closing reaction on raw materials comprising bisphenol A and chloropropylene oxide to prepare a crude bisphenol A epoxy resin, removing water and excess chloropropylene oxide, refining, desalinating, neutralizing through water washing, removing a solvent, and concentrating to obtain a bisphenol A epoxy resin. The preparation method has the advantages of stable process, clear parameters, detailed steps and strong feasibility; and the bisphenol A epoxy resin prepared through the preparation method has high purity, has an organic chloride content of below 0.02wt%, and has high epoxy value, high softening point and extremely good quality, so the performances of the bisphenol A epoxy resin are improved.

The invention discloses a novel method for preparing single-layer MoS2. Specifically, the size of the single-layer MoS2 and experiment repeatability are improved with a catalytic method. According to the invention, a SiO2 / Si substrate is treated with a carbon-containing catalyst solution, and a single-layer MoS2 sample is prepared with a CVD method. The optical properties and surface topography of the sample are subjected to test analysis with a metallographic microscope, a Raman spectrometer, an atomic force microscope, a scanning electron microscope and the like. According to the invention, the single-layer MoS2 is prepared with the catalytic method, and the size of the single-layer MoS2 is improved to tens of micrometers. The quality of the single-layer MoS2 is good, and the repeatability of the experiment is improved. Compared to prior arts, with the method, large-size single-layer MoS2 is prepared, and experiment repeatability is also improved. The experiment has the advantages of simple operation, high feasibility, short preparation period, low cost, and the like.

The invention discloses an adjustable microphone array arrangement device, which comprises a support frame and a rectangular frame body fixedly arranged at the top of the support frame, wherein slide bars are arranged at two side walls of the rectangular frame; sliding chutes are arranged in the slide bars; a guide rod group is arranged between the two slide bars and comprises a plurality of guide rods which are arranged up and down in parallel; the guide rods are connected with the slide bars in a sliding manner; clamping groovesare arranged in the guide rods; and each clamping groove is of a double groove structure. Diverse flexible arrangement is provided for microphones, the condition that the microphones are arranged into higher-accuracy diverse arrays becomes possible, and the error of experiment results can be greatly reduced, so that analysis of the sound source array directivity is improved.

The invention provides a method of extracting high-purity phycocyanin. The method comprises the following steps of: adding buffer liquor into spirulina powder, uniformly stirring, freezing and unfreezing; then, carrying out high-pressure homogenizing and wall-breaking to obtain spirulina wall-broken liquor; taking liquid supernatant after centrifugal separation, respectively filtering by micro-filtration membranes with the bore diameters of 2 microns, 0.45 micron and 0.2 micron to obtain phycocyanin crude extract; passing through combined resin for discoloring and purifying, and collecting eluate, i.e., phycocyanin extract; purifying by a hydroxyapatite chromatographic column to obtain phycocyanin fine extract; finally, carrying out high-speed centrifugal spray drying after desalting and concentrating to obtain the high-purity phycocyanin. The phycocyanin can be extracted to the greatest extent by the method disclosed by the invention; moreover, the product is not polluted secondarily, extraction rate of the high-purity phycocyanin in the spirulina is over 80.0%, and product purity (A620 / A280) reaches 4.0.

The invention discloses an EGR cooler heat exchange efficiency detection system which comprises an engine, a dynamometer, an air inlet system, a fuel supply system, a cooling circulation water controller, a fuel consumption meter, an air flow meter, a temperature sensor, a pressure sensor, and a control device. The controlled end of the engine is connected to the dynamometer. The engine is connected to the fuel supply system and the air inlet system. The exhaust port of the engine is connected to an EGR cooler to be detected through an exhaust main pipe. The controlled end of the EGR cooler to be detected is connected to the cooling circulation water controller. The control device is connected to the dynamometer, the air inlet system, the fuel supply system, and the controlled end of the cooling circulation water controller. The data collection end of the control device is connected to the fuel consumption meter, the air flow meter, the temperature sensor and the pressure sensor. The system has the advantages of high feasibility, simple operation and low cost, the temperature of exhaust gas is controllable in the detection process, the EGR cooler heat transfer efficiency which is in accordance with an EGR cooler actual use condition can be tested, and a basis can be provided for the engine reasonable matching and engine efficiency improvement.

The invention discloses a water-soluble astaxanthin product and a preparation method thereof. The water-soluble astaxanthin product comprises astaxanthin, whey protein and ethyl cellulose, the contentof the astaxanthin is higher than 60%, and particle size of the product is micron-size. The preparation method comprises following steps: an astaxanthin alcoholic solution, an ethyl cellulose alcoholic solution and a whey solution are subjected to batch mixing in certain proportion, homogenizing emulsification, secondary emulsification, low-temperature settling, filtering, low-temperature vacuumevaporation and spray freeze drying, and the water-soluble astaxanthin is prepared. According to the invention, water solubility and stability of the astaxanthin are effectively improved, the applicable range of the astaxanthin is expanded, and the product is widely applicable to multiple fields of food, healthcare products, medicine and the like.

The invention discloses an operation method of a combined heat and power system containing wind and light renewable energy. The method includes the following steps that: the optimization objective andconstraint function of the system containing the wind and light renewable energy are set, and an optimization model is established; a Monte Carlo random sampling-based multi-objective optimization algorithm is adopted to solve the optimization model, and a plurality of Pareto optimal solutions can be obtained; and decision maker preference information is set, and one of the Pareto optimal solutions is selected as the operation plan of the combined heat and power system. According to the method of the present invention, the multi-objective optimization algorithm is adopted to optimize the combined heat and power system with factors such as heat and power load and the uncertainty of renewable energy power generation considered, and therefore, the method accords with actual conditions, and is more feasible; the evolutionary multi-objective optimization algorithm is adopted to obtain a set of Pareto optimal solutions which have their respective advantages, a decision maker can select andimplement the operation plan of the combined heat and power system according to different situations. The method of the invention is used for calculating the optimal operation plan of the combined heat and power system.

The invention relates to a double-transformer substation harmonic wave state estimation method. The method comprises the steps that all elements in a node voltage phasor and an injection current phasor are classified according to measurement quantity and state quantity, and are arrayed according to the measurement quantity-state quantity sequence, then a node admittance matrix is correspondingly segmented, and a measurement equation is obtained through conversion. As for a parallel running network topology of two three-winding transformers, on the premise that the current measurement point serial number and the voltage measurement point serial number are known, all segmented matrixes of the admittance matrix are written out by combing the node serial numbers, and then are substituted into the measurement equation for calculating a state phasor. The double-transformer substation harmonic wave state estimation method is high in estimation accuracy, easy to implement and low in implementation cost.

The invention relates to an intelligent access device for optical discs in a library. The device comprises a main station layer, an auxiliary station layer and an optical disc access control layer, wherein the auxiliary station layer is in communication connection with the main station layer, and the optical disc access control layer is in circuit connection with the auxiliary station layer. A main station PC and a database connected with the main station PC are arranged in the main station layer. A plurality of single-chip microcomputer systems are arranged in the auxiliary station layer, and each single-chip microcomputer system is connected with the main station PC through a bus. The optical disc access control layer comprises a plurality of optical disc storage cabinets, and each optical disc storage cabinet is in circuit connection with the corresponding single-chip microcomputer system. According to the intelligent access device for the optical discs in the library, the optical discs in the library can be reasonably stored and can be managed and maintained easily, the workloads of librarians can be reduced, and the device is convenient to use, reliable and high in feasibility.

The invention provides a power grid overhauling plan compilation method based on graphic operations. In the method, firstly a picture element and standard data mapping mechanism is adopted, heuristic search is triggered by virtue of the graphic operations and standard power grid overhauling basic data with uniform format are generated through searching in a device mapping base; and on the basis, tie line analysis is triggered by the graphic operations, the generated overhauling basic data and a power grid overhauling knowledge base are correlated, and the data adjustment and the final overhauling plan compilation are interactively completed under a graphical environment.

The surface treatment process for iron-base sintered metal piece includes the following steps: conventional deoiling and dedusting treatment, the subsequent water boiling to eliminate residual cleaning liquid, soaking in or brushing with proper hot dip coating promoter, stoving, and soaking in hot dip coating metal liquid for 10 sec to 2 min to obtain coating in the required thickness.

The invention discloses a connection structure of a wood frame column in a multi-story and tall wood structure. The connection structure comprises a wood column, prefabricated grooves, embedded type steel connection pieces, bolt holes and bolts, wherein the wood column is divided into an upper column and a lower column, and connection nodes of the upper column and the lower column are positioned at positions which are as high as the half storeys of adjacent upper and lower layers; the prefabricated grooves with identical sizes and depths are formed in two splicing sections of the upper column and the lower column; the embedded type steel connection pieces are mounted in the prefabricated grooves; the bolt holes are formed in the outer walls of the prefabricated grooves and the embedded type steel connection pieces; the bolts penetrate through the bolt holes and are tightened, so that the upper column and the lower column are connected to form the entire long wood column. According to the connection structure, short columns are used as the wood column connection nodes at the positions which are as high as the half storeys of the adjacent layers and then are spliced to reach a required height, but the intensity and the whole performance of the wood column cannot be reduced by splicing; therefore, the wood column can be either produced and spliced in a factory or spliced on the site. The connection structure improves the construction efficiency, is high in feasibility and can be well applied to actual engineering.

The invention relates to an identification method for identifying PGC transplantation offspring chickens through feather color in combination with molecular genetic markers, and belongs to the technical field of biology. In order to solve the identification problem of PGC transplantation offspring, the genetic source of the offspring chickens is successfully identified by adopting an offspring chicken feather color and microsatellite marker analysis method. The identification method is suitable for protection and species restoration of germplasm resources of poultry, and has high feasibility, accurate identification and low cost. The genetic composition of the offspring chickens can be effectively identified, and technical support is provided for production of gene editing model chickens.

The invention relates to a breeding method, and particularly relates to a method for induced mutation breeding by hypergravity. The invention aims to solve the problem that the existing breeding of crops and pasture plants has long period, low speed, low efficiency and low mutation. The method comprises the steps of placing seeds or germinated seeds into a centrifuge, performing hypergravity induced mutation under hypergravity range of 200-5,000g for 1-48h; screening the seeds or the germinated seeds subjected to hypergravity induced mutation to obtain a mutant strain; breeding the obtained mutant strain for 3-4 generations to obtain germplasm resource with genetic stability, and breeding to obtain a good and stable self-bred line or variety; and performing cross breeding on the obtained good and stable self-bred line or variety, and selecting good germplasm resource to prepare cross combination as parent plant to complete induced mutation breeding by hypergravity. The breeding method provided by the invention is suitable for breeding new varieties of crops and pasture plants.

The invention relates to a model method of an unmanned aerial vehicle collision model based on a four dimensional coordinate. The method includes the following steps that initial parameter informationof an unmanned aerial vehicle and an invasion vehicle is acquired; relative movement situation of the unmanned aerial vehicle and the invasion vehicle is determined, the invasion vehicle without thepossibility of invasion is excluded; coordinates of the closest points in the movement trajectory of the unmanned aerial vehicle and invasion vehicle and time required to reach the closest point respectively are calculated; the shortest distance between the unmanned aerial vehicle and invasion vehicle is calculated; the shortest distance between the unmanned aerial vehicle and invasion vehicle iscompared with the data of an unmanned aerial vehicle collision box, the collision possibility of the invasion vehicle is judged; and the initial parameter information and historical parameter information of the unmanned aerial vehicle and the invasion vehicle are four dimensional coordinate information including three dimensional space positions and velocity. The data is updated and analyzed in real time by adopting a four dimensional coordinate analysis method with real-time velocity added. It is avoided that a defect of speed differences between the unmanned aerial vehicles is not consideredin the prior art, and the result shows that the method is more suitable for the unmanned aerial vehicle and has strong feasibility.

The invention relates to the field of material preparation, and particularly relates to a copper octanoate preparing method and a copper octanoate product. The method includes adding solvent oil and acopper sulfate solution into a first solution, reacting the mixture for 2-6 h to obtain a second solution, subjecting the second solution to liquid separation and washing, and then performing distillation to remove an organic phase, wherein the first solution is obtained by reacting an octanoic acid solution and a sodium hydroxide solution or the first solution is a sodium octanoate solution, andthe mole ratio of the octanoic acid to the sodium hydroxide in the first solution is 0.5-2.0. The method is simple to operate and high in feasibility. The prepared copper octanoate has good properties. The copper octanoate product prepared by the method has good properties.

The invention relates to a table tennis ball picker, which mainly comprises a handle and a ball cage, wherein the ball cage mainly comprises a left roller, a right roller, baffle plates, baffle plate shafts and telescopic belts. The table tennis ball picker is characterized in that the left roller and the right roller are connected and fixed by three parallel and equidistant baffle plate shafts close to edges of the rollers through threads; a plurality of telescopic belts made of elastic materials are fixed inside a cylindrical space which is enclosed by the baffle plate shafts; the distance between the telescopic belts and the edges of the rollers is smaller than the radius of table tennis balls; and various telescopic belts are arranged in parallel to form a cylinder, and the spacing of the telescopic belts is smaller than the radius of the table tennis balls.

The invention discloses a directionally grown titanium carbonitride crystal as well as a preparation method and an application thereof, and belongs to the technical field of metal ceramic composite material raw material manufacturing. The preparation method of the titanium carbonitride crystal comprises the following steps: weighing a titanium source, a nitrogen source and a carbon source, uniformly mixing, calcining in a protective gas atmosphere, taking out and cooling, then carrying out high-temperature calcination again, taking out and cooling to obtain the directionally grown titanium carbonitride crystal. The titanium carbonitride crystal prepared by the method has extremely high collapse damage resistance and hardness due to directional arrangement of the crystal, is compact in structure, and can be used in sintered bodies of cutting tools and wear-resistant parts and coating materials.

The invention discloses a flexible cable breaking force testing device and method.The flexible cable breaking force testing device comprises an upper clamp and a lower clamp which are oppositely arranged face to face, the distance between the upper clamp and the lower clamp is adjustable, and the two ends of a flexible cable with the breaking force to be tested are fixedly installed on the upper clamp and the lower clamp respectively, the flexible cable with the tensile strength to be tested between the upper clamp and the lower clamp is vertically placed, the upper clamp and the lower clamp are both connected with the driving mechanism, and the driving mechanism drives the upper clamp and the lower clamp to move towards or away from each other, so that the flexible cable with the tensile strength to be tested is snapped, The flexible cable breaking force testing device and method, provided by the invention, are self-created devices, can quickly test the tensile strength of the cable, are simple in overall structure and high in feasibility, do not occupy a large amount of space, are suitable for testing the tensile strength of single-core rubber and plastic flexible cables with fifth and sixth types of conductors with outer diameters of 20mm and below, and are suitable for industrial popularization and application.

The invention discloses a preparation method of a high-performance noble metal catalyst. The method comprises the following steps: 1, adding polyvinylpyrrolidone to anhydrous ethanol, performing stirring until the polyvinylpyrrolidone is completely dissolved, then adding sodium percarbonate, performing mixing, and carrying out a reduced pressure distilling reaction for 2-4 h to obtain a viscous slurry; 2, adding tourmaline powder to the viscous slurry, performing ultrasonic dispersion for 20-60 min, adding the obtained material into a mold, and carrying out constant-temperature pressurizing curing to obtain a prefabricated block; 3, adding the prefabricated block to anhydrous ethanol, and carrying out microwave soaking for 30-60 min to obtain a residual liquid and a porous block; 4, addingpalladium acetate to the residual liquid, performing ultrasonic dispersion for 2-10 min, and carrying out reduced pressure distillation to form a concentrated liquid; 5, adding the porous block to the concentrated liquid, taking out the porous block, drying the porous block, and carrying out infrared drying for 2-5 h to obtain a prefabricated block; and 6, adding the finally obtained prefabricated block to acetic acid, carrying out an ultrasonic reaction for 20-40 min, taking out the prefabricated block, and drying the prefabricated block to obtain the catalyst. The preparation method has theadvantages of strong feasibility, high recyclability and reusability of the anhydrous ethanol, and meeting of national environmental protection requirements.

The invention discloses a frost-free heat pump system device for reverse-flow reverse-osmosis regeneration. The device comprises a heat pump subsystem (I) and an anti-freezing solution regeneration subsystem (II); the heat pump subsystem (I) is composed of a heat source tower (1), a circulation working medium pump (13), one or more levels of heat pump main units (14) in parallel connection and a circulation working medium pipe (22); the anti-freezing solution regeneration subsystem (II) is composed of an anti-freezing solution circulation pump (2), a filter (3), one or N levels of solution reverse-osmosis devices (4) in parallel connection, a high-pressure pump (7), a pure water reverse-osmosis device (8), a light-side solution pipe (20) and a strong-side solution pipe (21). The inventionfurther a method for heat supply or refrigeration on a frost-free heat pump for the reverse-flow reverse-osmosis regeneration through the device. According to the device, the working efficiency and feasibility of an existing frost-free heat pump can be further improved.

The invention provides a position and transmit-receive precoding design method in HAP-assisted multi-pair relay communication, and the wireless transmission method mainly comprises the following steps: a user sends an uplink pilot signal to an HAP, and the HAP receives and carries out the channel estimation of the uplink pilot signal sent by the user, so as to obtain the partial channel state information of the user; and the HAP calculates a transmit-receive precoding matrix by using partial channel state information of the user, calculates the position of the HAP based on the maximized system sum rate, and amplifies and forwards a signal to be transmitted by a transmitting end user to a target user. The method is easy to operate and practical, large-range reliable communication is provided for ground users, rapid and accurate information transmission among the ground users is ensured, and the method has important practical significance for a mobile relay-assisted multi-antenna communication system.

The invention discloses a new method for building inbred lines of dioecious bivalve molluscs on a large scale. The new method comprises the following steps of acquiring sperms of a monosome; freezing the sperms at ultralow temperature; collecting eggs of a female monosome converted from a male monosome by utilizing a sex reversal characteristic of molluscs on time; activating the frozen sperms, fertilizing with the eggs of the same monosome and incubating to obtain offspring of the same monosome, namely successfully building an inbred line. Different from the traditional habit of building an inbred line by screening spatial hermaphroditic monosomes from dioecious molluscs, the new method has the advantages that the inbred lines of various dioecious bivalve molluscs are built on a large scale, the gene purification speed of the dioecious molluscs is improved, a variety breeding cycle is shortened, and a solid foundation is laid for building pure lines (new varieties); no heterologous gene is imported, and the new method has the advantages of simple operation, high practicability, convenience for promotion and the like.