236results about How to "Original" patented technology

The invention relates to environmental pollution plant restoration, specifically to a screening method for heavy metal enriching / accumulating plant. 1)choosing experimental field 2) determining the screening object 3) determining the polluted object 4) potted plant screening experiment for heavy metal The invention chooses weeds as screening object, potted plant experiment , wild sampling and analysis, plot experiment as main means, screen plant for plant restoration. The invention is economic, highly effective, high ecological safety, wide adaptability,

The invention discloses a novel rubber compound stuffing preparing method based on mercapto-alkene chemical reaction. The preparing method comprises the following steps of using rubber common stuffing as a raw material, ultrasonically processing two kinds of stuffing to be compounded in solvents respectively to enable the stuffing to be evenly scattered, enabling a silane coupling agent containing double bonds and mercapto groups to react with hydroxide radicals or other oxygen-containing groups in structures of the two kinds of stuffing respectively to obtain the double bonds and two kinds of mercapto-group silane coupling agent modified stuffing, ultrasonically scattering the double bonds and the two kinds of double-bond mercapto-group silane coupling agent modified stuffing in a solvent, adding a photoinitiator, triggering the mercapto-alkene chemical reaction through exposure of ultraviolet light, connecting the two kinds of stuffing through chemical bonds, then centrifuging or filtering and separating, drying, smashing and sieving to obtain novel rubber compound stuffing. According to the preparing method, the stuffing is firstly modified through the silane coupling agent, and then the two kinds of stuffing are compounded in a chemical bond mode through the high-efficiency mercapto-alkene chemical reaction to obtain the novel rubber compound stuffing. In addition, the preparing method belongs to pioneering researches.

Attribute information accessory to a pixel can be used to determine whether to execute an interpolation process of less than one pixel at a scan line changing point in color misregistration compensation for a printout from an image forming apparatus having a characteristic shifted in the laser scanning direction for each color. When the attribute information is an attribute representing execution of the interpolation process of less than one pixel, it is enlarged in the sub-scanning direction. Attribute information of each color component can be generated from attribute information accessory to a pixel by using the attribute information accessory to the pixel, and each color component value which forms the pixel.

The invention relates to a compact three-phase separation method and device. The method combines rotational flow, air floatation and coalescence technologies are combined and comprises establishment of an air floatation and rotational flow field in a separation cavity and coalescence separation of oil skimming solution in an inner cylinder. The device comprises a tank, a distributor, a jet flow educator, the inner cylinder, an inner coalescence part and a bottom baffle, wherein a jet flow nozzle is arranged at the front part of the jet flow educator, so that a gas-liquid mixture is formed; a drain pipe at the lower part is properly arranged, so that a rotational flow field is established in the separation cavity; the synergistic effect of air floatation and rotational flow separation is played; an oil skimming groove for skimming oil is at the upper end of the inner cylinder; the inner coalescence part in the interior can complete coalescence separation of the oil skimming solution and independent excretion of oil water; and, due to reasonable design of the size of the inner cylinder, the rotational flow field in the separation cavity is more reasonable to distribute. The device is free from external gas supply and gas-liquid auxiliary circulation facilities and has the advantages of compact structure, short residence time and small occupation area; and the device can be widely applied to degassing and removing oil in production water or sewage containing oil and gas.

The invention relates to a rail traffic passenger flow evacuation demand prediction method under sudden events. The method comprises the following steps of 1) acquiring a normal short-time traffic demand sample set according to historical ticket card data of a rail traffic automatic toll collection system, and based on the normal short-time traffic demand sample set, carrying out multi-step prediction by adopting a mixed prediction model based on principal component analysis to obtain a prediction result of a normal short-time metro travel requirement; 2) establishing a rail traffic network directed graph according to a topological relation of a rail traffic network; 3) distributing a rail traffic travel OD to obtain a distribution matrix F; 4) according to the characteristics and prior information of the sudden events, in combination with the prediction result, obtaining a calculation formula of evacuation requirements of all stations during the event influence period; and 5) acquiring spatiotemporal evolution of the evacuation requirements during the influence period of the sudden events through simulation, and acquiring a peak retention value. Compared with the prior art, the method has the advantages of being high in operability, high in practicability, capable of being directly applied, complete and the like.

The invention provides a new long noncoding RNA (LncRNA) Lnc21q22.11 sequence, and a primer pair and kit for detecting expression level of the long noncoding RNA in cells and tissues. The full length of the LncRNA Lnc21q22.11 is identified to be 1202bp for the first time, the specific primers are utilized for the first time to detect the expression level of the LncRNA Lnc21q22.11 in stomach cancer cells, 35 pairs of stomach cancer line and para-carcinoma tissues, colorectal cancer cell lines and 10 pairs of colorectal cancer and para-carcinoma tissues, and thus, the kit is creative. The detection of the expression of the LncRNA Lnc21q22.11 in the stomach cancer tissues by using the kit and specific primers can be used as an effective means for stomach cancer and colorectal cancer diagnosis, curative effect observation, prognosis judgment, focus residue and relapse detection and the like. The kit is simple to operate, has the advantages of high stability and high sensitivity, and has far-reaching clinical meanings and popularization performance.

The invention provides a rapid water supply pipe network model correction method for adjusting node flows and pipeline resistance coefficients at the same time. The method comprises the following steps of: grouping and initializing pipeline resistance coefficients; grouping and initializing node flows; calculating a residual error between an observed value at a monitoring point and a calculated value; calculating a pipe network monitoring point sensitivity matrix; calculating a parameter adjustment value; and updating a parameter value. The method has originality, is an important supplement inthe field of water supply pipe network model correction research, provides important technical support for intelligent online monitoring and management of water supply pipe networks, and has good population value and practical engineering application value.

The invention discloses a preparation method for a scale-adjustable nano porous metal material and belongs to the field of porous material preparation. A pore-forming material is added to superfine metal powder, compression molding of the superfine metal powder is conducted, and then the superfine metal powder is sintered in a vacuum sintering furnace to obtain the porous material. The interior of the porous material contains multiple pore scales of nano-micron-milli, and the dual-adjustment of the inside pore scale of the porous material and the surface roughness scale of a metallic matrix can be achieved by controlling the parameters such as the grain size of the metal powder, the content and grain size of the pore-forming material, the sintering temperature and the holding time and the follow-up treatment process, so that the porous material has super hydrophilicity, and the efficiency of boiling heat transferring is significantly improved. The preparation method for the scale-adjustable nano porous metal material is low in cost, easy to operate and reliable in technology; the product can be used for a wick of a heat pipe, the evaporating surface of an evaporator and other boiling phase-changing heat transferring devices, so that the preparation method for the scale-adjustable nano porous metal material has good application prospects.

The invention provides a top corrosion testing device of a wet gas loop in the high-temperature and high-pressure environment, which is applicable to wet gas top corrosion simulation experiments under actual high-temperature and high-pressure working conditions and mechanism research of corrosion behaviors. The top corrosion testing device comprises a heating kettle, a pipeline circulating system, a heating and heat insulation system, a circulating condensed water tank refrigerating system, a circulating pump, a signal conduction channel, an external control box, a flow state observation window, an external gas supply system, a three-electrode system, an electrochemical work station, a computer and the like. The device has the advantage that the actual working conditions, including a flow state, a flow speed, pressure, temperature and the like of fluid in a pipeline, in the pipeline can be really simulated, so that the actual environment can be simulated to the greatest extent and real electrochemical data is measured. With the adoption of the device provided by the invention, a top corrosion in-situ electrochemical signal test can be carried out on a test sample, and a corrosion mechanism of pipeline steel can also be researched by utilizing a weight loss method. Therefore, the device provided by the invention has very important meanings on the research of a wet gas top corrosion mechanism of the pipeline steel.

The invention provides a top-corrosion electrochemical testing device in high-temperature and high-pressure environments, belongs to the field of corrosive electrochemistry, and is suitable for top-corrosion simulation experiments and corrosion behavior mechanism research in high-temperature and high-pressure working conditions. The top-corrosion electrochemical testing device comprises a high-temperature and high-pressure reaction kettle, a heating and heat preservation system, a circulating condensate water tank refrigerating system, a three-electrode system, a signal conduction pathway, a control box, an external air supply system and a computer. The device has the advantages that actual high-temperature and high-pressure working conditions can be achieved; top-corrosion in-situ electrochemical signal testing can be carried out; and the method is of great significance on mechanism research on high-temperature and high-pressure top-corrosion behaviors and electrochemical reaction.

The invention discloses a method for preparing a metal surface super-hydrophobicity aluminum coating and aims to solve the technical problems that in existing metal aluminum surface super- hydrophobization treatment technologies, the treatment temperature is high, the vacuum environment is required, the cost is high, the treatment time is long, the damage to sample surface is severe during treatment and the like. The technical scheme includes that a micrometer and nanometer scale composite structure is constructed on a reactive metal based magnetron sputtering aluminum coating surface at the room temperature and within 10 minutes by a cathode current treatment method, then a sample is soaked in a molten tetradecanoic acid of 65 DEG C to 70 DEG C for 25 to 40 minutes, and superfluous tetradecanoic acids on the surface are cleaned out by ethanol to form a super-hydrophobic surface. The method has the advantages that the matrix temperature of a workpiece is low in operating process, the treatment process is simple, the equipment cost is low, the repeatability is good, the consumed time of preparation process is short, toxic pollutants are not generated, environmental protection and labor protection are facilitated, and the like.

The invention relates to the field of remote situation awareness, in particular to an autonomous pose measurement method based on an SLAM technology, which is realized based on a visual sensor, an IMU inertial navigation sensor and a GPS sensor, and comprises the following steps: receiving point cloud data, image information, pose information and target position information of a scene to be built; carrying out object-level motion scene segmentation on the high-dynamic scene based on an improved polar geometry constraint 3D point cloud motion segmentation algorithm; performing a multi-source data positioning and attitude determination algorithm on the point cloud data, the image information, the attitude information and the target position information, performing a 2D-3D matching algorithm for the image information of the static part, a dynamic target and viewpoint position correlation estimation algorithm is adopted for the dynamic target to achieve the positioning; finally, carrying out three-dimensional point cloud scene construction on a static part in a scene to obtain accurately matched point cloud data, then carrying out dynamic object construction on a dynamic target in the scene, and carrying out global optimization on a positioning and attitude determination result in an auxiliary mode to complete the pose measurement.

The invention discloses a dynamic detection and filtering method for invalid AP in a WIFI indoor positioning system. The method comprises detection and filtering, wherein (1) Detection comprises the following specific steps of: receiving, storing and forwarding UDP message related to positioning information RSSI by a gateway part of a WIFI indoor positioning server, analyzing the UDP message on the same day at the time requiring less indoor positioning each day, taking a MAC address of wireless equipment as a unique identification, collecting the quantity of the positioning message of the same equipment and the connection condition of the wireless equipment and the AP, automatically generating an invalid AP table on the same day and dynamically updating the overall invalid AP according to certain strategy dynamics; (2) filtering comprises the following specific steps of: on the basis of the overall invalid AP table, filtering the UDP message of the invalid AP on the gateway part, screening the message used for positioning and sending to WIFI indoor positioning engine. According to the invention, the problems of much more invalid data stored by the original WIFI indoor positioning system and high calculating pressure of the positioning engine can be solved and the physical storage pressure and positioning of data and the calculating pressure based on the behavioral analysis of the position can be relieved.

The invention discloses a multifunctional remote control blowout rescue vehicle which comprises a mast, a pressurizing cylinder, an igniting drum centralizer, an igniting drum, a rotating power head, a blowout preventer, an upper car, a lower car, a mast lifting device, a spraying cutting frame and a remote control panel for controlling all the parts, wherein the mast is arranged on the upper car through the mast lifting device; the rise and fall and the perpendicularity adjustment of the mast can be realized under the control of the mast lifting device; the upper car is arranged on the lower car; when the mast is erected, the pressurizing cylinder, the igniting drum centralizer, the igniting drum, the rotating power head and the blowout preventer are arranged, so that the function of hoisting the blowout preventer can be achieved; when the mast is retracted and horizontally placed, the spraying cutting frame is arranged, so that the function of spraying and cutting the old wellhead can be achieved. The multifunctional remote control blowout rescue vehicle can work nearby a fire source; when the blowout accident happens, the multifunctional remote control blowout rescue vehicle can carry out the operations of cleaning the scene, spraying and cutting the old wellhead, hoisting the blowout preventer, and the like; all the operations are completed under the remote control state, so that the personal safety of the rescue worker can be guaranteed.

The invention provides an autonomous sensing system using change of a parameter monitoring load of a motor system and a system abnormity. The autonomous sensing system comprises a motor system parameter detecting and sensing module, a motor system information processing and analyzing module, an electrical transmission motion system position, speed and torque calculation-analysis module, an electrical transmission motion system abnormity feature library module and a motion system abnormity display and alarm unit. Parameters of the motor system include the DC voltage and current of a motor driver, temperatures of an inverter and a radiator, and the three-phase voltage, the three-phase current, output torque and output rotating speed of the motor. The parameters of the motor system are collected and analyzed to detect impact condition of the load, mechanical faults in a system transmission link and system operation abnormity and system stability lead by transmission skid and system load change, so that the system can monitor the health and operation states of itself in real time, and operational safety and reliability of the system are ensured.

A cheaper composite inorganic-organic flocculant for treating sewage or fresh water is prepared from inorganic salt (Al salt or Fe salt), starch and alkali through proportioning, pretreating starch and inorganic salt, and synthesizing reacting. Its advantages are low cost, high effect and no secondary pollution.

The invention relates to a method for synthesizing organic compounds, in particular to a process method for synthesizing 4-site heteroatom-substituted cyclohexenyl halide. The method comprises the following steps of: performing refluxing reaction on 4-site heteroatom-substituted cyclohexanone (1) and 1 to 50 equivalents of anhydrous hydrazine or hydrazine hydrate in a solvent at the temperature of -20 DEG C; filtering or spin-drying the solvent to obtain corresponding hydrazone; reacting the hydrazone with a CuX2 / alkali mixture in an alcohol solvent at the temperature of between -20 and 40 DEG C; adding aqueous alkali and a solvent after the reaction; performing separation to obtain mixed solution; adding organic alkali and performing the refluxing reaction; adding 1N acid to remove excessive alkali; adding saturated NaHSO3 to react; and removing the solvent to obtain the 4-site heteroatom-substituted cyclohexenyl halide (3). The method has the advantages of original and simple synthesis process and mild process condition, is easy and convenient to operate, avoids super-low temperature reaction and column chromatography purification involved in literatures, and is suitable for industrial scale-up production.

The invention discloses an experiment device for ground subsidence induced by underground water leakage and a use method of the experiment device, and belongs to the technical field of geological hazard monitoring and warning. The experiment device comprises a soil tank, a water tank located below the soil tank and a collapse cylinder for connecting the water tank with the soil tank, wherein the upper end of the collapse cylinder extends into the soil tank, so that an inner cavity of the collapse cylinder is communicated with an inner cavity of the soil tank, a soil filter screen is arranged at one end, stretching into the soil tank, of the collapse cylinder, the lower end of the collapse cylinder stretches into the water tank to enable the inner cavity of the collapse cylinder to be communicated with an inner cavity of the water tank, and a negative pressure test sensor for testing pressure of the inner cavity of the collapse cylinder is arranged at one end, stretching into the water tank, of the collapse cylinder; a valve is arranged on the side wall of the water tank, and a water pump is connected with the side wall of the water tank to be used for testing water pressure in the water tank; a ground subsidence monitor for monitoring ground subsidence is mounted in the soil tank. The experiment device provides a scientific basis for effectively monitoring ground subsidence disaster and optimizing underground construction plans.

The invention discloses a mechanical dynamic tester for a flexible impervious joint structure and a testing method. aiming at the problems that after a face film or a panel impervious structure of a high rock-fill dam runs for a long time with water storage, the part anchored by a conventional impervious film at the periphery of the upstream face of a dam body under certain depth or the flexible water-stopping structure at the peripheral joint of the panel easily has damage phenomenon. The mechanical dynamic tester and the testing method can simulate the deformation damage of the face film and the panel impervious structure under different upper and lower contact materials on site. The mechanical dynamic tester group of the flexible impervious joint structure mainly comprises a high-pressure container (pressure chamber), a water charge and discharge (gas) pipe valve system, a mechanical dynamic and test specimen installation platform system, and a displacement and pressure measurement feedback control system and a monitoring system. The damage mechanism at the anchoring joint part at the periphery of an impervious body of a high face membrane rock-fill dam at a certain water depth can be disclosed by the test.

The invention relates to an aflatoxin pollution risk early warning molecule and application thereof. The method comprises the following steps: weighing a quantitative sample, extracting aflatoxin pollution risk early warning molecules to obtain a sample extracting solution, and detecting and analyzing the sample extracting solution to obtain a quantitative result of the aflatoxin pollution risk early warning molecules; taking the content of one or more aflatoxin pollution risk early warning molecules as a variable, modeling by a chemometrics method to obtain a classification prediction model,and performing risk assessment based on the aflatoxin pollution risk of the classification prediction model sample, wherein the aflatoxin toxin-producing strain early warning molecule is one or a combination of more than one of versiconol (VOH), sterigmatocystin B and 5-MST. The aflatoxin pollution risk early warning molecule discovered by the method has originality, and the early warning method established according to the aflatoxin pollution risk early warning molecule can be used for early warning before aflatoxin pollution occurs.

The invention discloses a bonding method for a 3D (three-dimensional) grating in a naked eye 3D display screen, namely surface bonding is performed by filling an optical clear adhesive (OCA) or a liquid optical clear adhesive (LOCA) between a 3D grating sheet and a liquid crystal panel. During the surface bonding process, the bonding method comprises the following steps of: (1) utilizing an optical mask plate (MASK) to set MARK and FOG MARK marks of the grating sheet to ensure the MARK consistency of the two; (2) using a bonding device to perform sampling multiple times by adopting a 3D grating sheet MARK identification and sampling way, and moving a FOG platform to capture the center position of the FOG MARK through a CCD (charge coupled device) multiple times during position correction; and (3) using the high-precision CCD to match with a direct type bonding way for attaching; and furthermore, the FOG platform and a grating platform on the bonding device can simultaneously adjust the positions. The invention further discloses the naked eye 3D display screen. According to the bonding method disclosed by the invention, the production cost can be effectively reduced by using the precision property of an existing point bonding production device, the naked eye 3D display screen can effectively avoid rainbow stripes caused by optical diffraction, the visual fatigue can be effectively eliminated, the light transmittance is high, and the power consumption of backlight of the screen can be effectively reduced.

The invention discloses a machine vision two-dimension detecting platform device which comprises an imaging system, a supporting system and a control system which controls the imaging system and the supporting system. The imaging system comprises a photoelectric imaging module and a data collecting module. The supporting system comprises a two-dimension workbench and an actuating mechanism, and the control system comprises a controller and a computer. The controller and the computer are in both-way connection, the controller receives a control instruction of the computer, and the computer and the data collecting module are in both-way connection. The controller controls the actuating mechanism and the photoelectric imaging module respectively, the actuating mechanism and the two-dimension workbench are in driving connection, the two-dimension workbench is connected with the photoelectric imaging module, and the photoelectric imaging module and the data collecting module are in both-way connection. The entire process of the machine vision two-dimension detecting platform device is rarely or does not need to participate by people, the automatic degree is high, online measurement can be basically achieved, and the measuring speed is based on the complexity of measured objects.

The invention relates to an efficient arsenic-absorbed ecological ciliate desert grass screening method. The method comprises the following steps: conducting field ciliate desert-grass acquisition in multiple regions of China, and carrying out captive breeding of ciliate desert-grass seedlings; conducting short-term water culture experiment in arsenic-containing nutrient solution by utilizing ciliate desert-grass seedling of the right age in multiple regions, and initially screening out 2-5 ecological ciliate desert-grass with higher arsenic concentration of the overground part; and transplanting the 2-5 initially screened out ecological ciliate desert-grass with higher arsenic concentration of the overground parts to different gradients of artificial simulated arsenic-polluted soil for culturing for 12 weeks, and preferentially screening out efficient arsenic-absorbed ecological ciliate desert grass by taking overground part biomass liveweight, overground part arsenic concentration, overground part arsenic absorption total quantity, and arsenic tolerance index number of the ciliate desert-grass as indexes. The screening method is simple and feasible, high in routinization, and easy to popularize, and has important meanings on restoring the arsenic-polluted soil and protecting the quality safety of agricultural products.

The invention discloses a cerebrum neurotrophy composition and a preparation method. The cerebrum neurotrophy composition comprises the following raw materials in parts by weight of 3-10 parts of sialic acid, 3-10 parts of one or the combination of two of DHA algae oil powder or phosphatidylserine, 40-60 parts of fructo-oligosaccharide and 40-50 parts of maltodextrin. The cerebrum neurotrophy composition disclosed by the invention has the beneficial effects that the cerebrum neurotrophy composition is pinpoint in selection of the raw materials, scientific in formula and synergistic in effects,and has originality; but pertinence products in this type do not exist in the market, so that the blank is just filled. In the respect of the preparation method of the cerebrum neurotrophy composition, an embedding technique and an inclusion technique are adopted, so that the fishy smell of DHA is improved, and the water solubility of the prompt DHA and ginsenoside Re is improved; and then the cerebrum neurotrophy composition is further prepared into powder or granules, so that the effects of being convenient to take, moderate in sour and sweet degrees, delicious and easy to absorb can be achieved.

The invention discloses a preparation method of hard alloy with orientational distribution of featured crystal surfaces of WC crystal grains and belongs to the technical field of hard-alloy metallurgy. The preparation method comprises the following steps of: by adopting a mixture of tungsten oxide, cobalt oxide and carbon material as a raw material, carrying out mixed ball grinding; carrying out cold pressing on ball-ground mixed powder to form a blank, and putting the blank in a vacuum reaction furnace to carry out in-situ reduction and carbonization reaction to obtain WC-Co composite powder containing carbon-deficient phase components under lower temperature; and finally, putting the prepared composite powder in a sintering system which can apply sintering pressure to carry out in-situ reaction sintering densification on the powder to obtain the hard-alloy block material with orientational distribution of the featured crystal surfaces of the WC crystal grains. The preparation method has the advantages of simple process step, short preparation period and low sintering temperature and the like in the aspects of preparing the composite powder and sintering the hard-alloy block material; and the hard-alloy block prepared by sintering has controllable size of the WC crystal grains, obvious anisotropy of structures and mechanical properties and strong repeatability.

The invention provides a new-found long noncoding RNA Lnc5q21.2, a primer pair for detecting the expression level of the long noncoding RNA in a colon cancer cell line and tissue as well as a kit. The invention firstly finds differential expression of the long noncoding RNA Lnc5q21.2 in colon cancer and para-carcinoma tissues by using a chip technology. A full-length sequence of Lnc5q21.2 is firstly obtained by using a 5'-RACE technology and a 3'-RACE technology. The innovation is shown on the aspect that the expression level of the long noncoding RNA Lnc5q21.2 in colon cancer cell lines, 20 parts of colon cancer tissues and matched para-carcinoma tissues, gastric cancer cell lines as well as 20 parts of gastric cancer tissues and matched para-carcinoma tissues is detected by using specific primers and a semi-quantitative RT-PCR technology. The kit for specifically detecting the expression of the long noncoding RNA Lnc5q21.2 in the colon cancer tissues can be used as a powerful means for colon cancer and gastric cancer diagnosis, curative effect observation, prognosis, residual lesion and recurrence detection and the like; and the kit is simple and convenient to operate, good in stability and high in sensitivity so as to have deep clinical significance and popularization performance.

Provided is a polished rod sealing device which comprises a main sealing assembly, a secondary sealing assembly and a deviation adjusting and blowout controlling assembly. The polished rod sealing device is characterized in that the main sealing assembly is positioned on the upper portion, the secondary sealing assembly is positioned in the middle portion, and the deviation adjusting and blowout controlling assembly is positioned on the lower portion; when the main sealing assembly is used for achieving normal production of an oil well, a polished rod and a well opening are sealed, the secondary sealing assembly achieves temporary sealing when a main sealing packing is replaced, the lower portion of the deviation adjusting and blowout preventing assembly is connected with the well opening, and the adjustment of angle displacement and horizontal displacement between the polished rod and the well opening is realized, so that the polished rod and the well opening are arranged concentrically, and the function that blowout is prevented after the polished rod is broken is realized. The polished rod sealing device is novel in design and compact in structure, and hydraulic sealing, angle displacement, horizontal displacement and blowout preventing are integrally designed, and the polished rod sealing device can be adjusted and operated conveniently. According to the polished rod sealing device, the eccentric wear of the packing is lightened, the loading of a pumping unit is reduced, and electric energy is saved. By good sealing effectiveness of the packing, the polished rod sealing device is especially applicable to a heavy oil steam injecting area and a heavy oil polymer injecting area for sealing well openings of oil wells, so that crude oil loss is avoided, environmental pollution is prevented and oil filed management level is improved.

The invention discloses an energy and fertilizer saving orchard ditching fertilizer applicator and belongs to the technical field of agricultural machines. The equipment comprises a tractor and a rack connected to the rear end of the tractor. A ditching unit, a fertilizer applying unit, a stirring unit and a backfill unit are sequentially mounted on the rack from front to back, the fertilizer output end of the fertilizer applying unit is located above the work range of the ditching unit, the work range of the stirring unit is located within the work width of the ditching unit, and the work depth of the ditching unit ranges from 15 cm to 25 cm; the lowest end of the stirring unit is 25-35 cm lower than that of the ditching unit, the ditch depth is carried out twice, consumed power is reduced, and fertilizer and soil are stirred to be more uniform through an axial rotary tool. Meanwhile, the fertilizer is scattered to the soil layer 20 cm below the soil layer, the fertilizer is mixed and stirred at the position, absorption of a developed root system is promoted, the root system of a fruit tree on the shallow layer is not developed, and waste caused by shallow layer fertilization is avoided.

The invention discloses a method for preparing a multi-grade antimonytelluride nano wire harness array by adopting physical vapour deposition. The method comprises the step of depositing multi-grade nano wire harness array antimonytelluride on a glass substrate in vacuum low temperature environment by regulating distance between a glass substrate and a tungsten boat, magnitude of output current of an alternating current power supply and deposition speed of an evaporation source antimonytelluride. Because of low temperature environment, the multi-grade nano wire harness array antimonytelluridecan be deposited on a processor such as a CPU (central processing unit). By applying the method disclosed by the invention, the antimonytelluride nano wire harness array prepared by physical vapour deposition has uniform structure, and uniform distribution of a nano phase is effectively guaranteed.

The invention discloses an AP selection indoor positioning method of a path loss model, which comprises the following steps: (1) offline data collection; (2) establishment of an initial fingerprint database; (3) division of sub-areas of the fingerprint database; (4) effective selection of the AP. Although the AP selection method based on the path loss model can effectively select the APs that havesimilar contributions to positioning, the stability of the AP is not considered, and the Fisher criterion can achieve effective selection of the stable AP. Therefore, the AP selection indoor positioning method of the path loss model in the present invention introduces the Fisher criterion into the AP selection method based on the path loss model, thereby making up for the problem of insufficientconsideration for selection of the stable AP, so that the constructed wireless map is more reliable, thereby improving the positioning accuracy.