66results about How to "Overcome density" patented technology

The invention discloses a method for scheduling a heliostat field in a tower solar thermal power station. In the method, an open-closed loop combined control mode is adopted; in open loop control, the control direction and position of a heliostat are computed in real time according to the running rule of the sun, the latitude and longitude of the heliostat as well as the geometric relationship between the positions of the heliostat and a heat absorber; and in closed loop control, a target position corresponding to each heliostat is determined through a closed loop sensor, and the heliostat is accurately tracked according to a real-time angle value of the heliostat fed back by the closed loop sensor, so that the energy-flux density of the heliostat field is homogenized and scheduled. According to the method, automatic homogenizing and scheduling of the energy-flux density projection of the heliostat field are realized, and the defects of poor energy-flux density homogenizing effect and unavailable self-correction caused by a large tracking error existing in open loop control are overcome effectively; and moreover, the method is easy to implement and is convenient to operate.

The invention relates to a dual-crank arm type piezoelectric-electromagnetic composite power generation device. The composite power generation device comprises a dual-crank arm type piezoelectric-electromagnetic composite transducer; the dual-crank arm type piezoelectric-electromagnetic composite transducer comprises a dual-crank arm type piezoelectric-electromagnetic composite power generation oscillator, an upper permanent magnet layer, an upper induction coil layer, a lower permanent magnet layer, a lower induction coil layer and a piezoelectric-electromagnetic composite transducer box; the upper permanent magnet layer is arranged in the middle of the upper induction coil layer; the lower permanent magnet layer is arranged in the middle of the lower induction coil layer; and the dual-crank arm type piezoelectric-electromagnetic composite power generation oscillator is arranged between the upper and lower permanent magnets, and the induction coils. A dual-crank arm type piezoelectric oscillator, a permanent magnet mass block and a rigidity-variable spring of the dual-crank arm type piezoelectric-electromagnetic composite power generation oscillator form an overall structure to generate a certain synergistic effect, so that the composite power generation device is relatively low in resonant frequency and relatively high in amplitude, and generated electric quantity is obviously increased; and therefore, the composite power generation device is widely applicable to the recycling fields of random, wideband, low-frequency, high-amplitude, and high-strength vibration energy in the environments.

The invention relates to a method for manufacturing fast-growing wood sheet, in particular to a manufacturing method for modifying a fast-growing poplar board, belonging to the technical field of sheet manufacture. The invention has the advantages of small internal stress of a compressed carbonized poplar board manufactured by the method and good stability of the size of the board, thereby ensuring the quality of a compressed carbonized wood. The invention overcomes the defects of a fast-growing poplar sheet, such as low density, low hardness, low strength, easy corrosion, difficult direct use and the like, improves the density of the sheet by carrying out compression and densification for the poplar sheet, carries out carbonization on the compressed poplar sheet on the condition of pressurization, and eliminates the compression stress inside the sheet so as to prevent springback of the sheet and improve the size stability, density and strength. The poplar board manufactured by the method can be directly used as a sheet. The compressed carbonized poplar board can be partially or entirely used to replace high-quality precious wood, thereby relieving the contradiction between continuously reduced precious wood resources and increasing demand for wood.

Disclosed in the invention is an energy-harvesting-circuit-based piezoelectric-electromagnetic composite energy harvesting device. The invention relates to a piezoelectric-electromagnetic composite energy harvesting device capable of improving an output power, which belongs to the technical field of the new energy and power generation. The piezoelectric-electromagnetic composite energy harvesting device comprises a piezoelectric-electromagnetic composite energy harvesting device body and an energy collection circuit. The piezoelectric-electromagnetic composite energy harvesting device body consists of a housing, a coil, an upper permanent magnet, a piezoelectric ceramic material, a foundation beam, a tapered permanent magnet, a lower permanent magnet, an upper electrode, a piezoelectric plate, a lower electrode, a left piezoelectric plate upper electrode lead, a right piezoelectric plate upper electrode lead. The energy collection circuit includes an electromagnetic energy harvesting device energy collection circuit, a piezoelectric energy harvesting device energy collection circuit, and a charging circuit for realizing composite charging and preventing current returning. According to the invention, conversion from an alternating current to a direct current is realized; the output power supply is improved for a load. The energy harvesting device has advantages of green and pollution-free effects, high energy density, shortened charging time, high reliability, high environment adaptability, convenient operation control, and low maintenance cost and the like.

The invention discloses a special die for one-step-formed multi-curved-face integral bullet-proof plates. The special die comprises an upper punch (2), a lower punch (3), an outer die (4) and a plug block (5). A die cavity (41) is formed in the outer die (4) and is communicated with two ends of the outer die (4). An opening (42) used for charging is formed in the top of the outer die (4) and is matched with the plug block (5) in shape. The die cavity (41) is communicated with the opening (42). The upper punch (2) is connected with an upper die plate of a semi-automatic horizontal press machine, and the lower punch (3) is connected with a lower die plate of the semi-automatic horizontal press machine. The upper punch (2) and the lower punch (3) can get into or come out of the die cavity (41) under the drive of the upper die plate and the lower die plate. The invention further provides a manufacturing method for the one-step-formed multi-curved-face integral bullet-proof plates by the special die.

Relating to plating of metal materials, the invention provides a preparation method of a titanium boride based inorganic composite coating. The mixed powder of micron-sized metal Al powder, micron-sized, submicron-sized or nano-sized TiO2 powder, and micron-sized, submicron-sized or nano-sized B4C powder is taken as a raw material, the mixed powder is sprayed on the alloy underlayer surface of a metal or alloy workpiece surface by thermal spraying. During thermal spraying, the Al, TiO2 and B4C in the mixed powder react with nitrogen in a powder feeding gas to synthesize the titanium boride based inorganic composite coating in situ. The method provided in the invention overcomes the defects of high raw material cost, complicated preparation process, high energy consumption, low efficiency, difficult control of coating processing precision, low coating density, poor coating uniformity, weak binding force between the coating and a substrate, low coating toughness, easy coating cracking, and unsuitability for application in large-scale industrial production existing in the prior art for preparation of titanium boride based composite coatings.

The invention discloses a preparation method for a porous graphene microelectrode and applications. The provided method is a one-step electrodeposition method, namely, oxidized graphene is subjected to electrochemical reduction into graphene, and the graphene is assembled on Pt wires at the same time. The employed Pt has a high conductivity, and the graphene has excellent conductivity and good biocompatibility. Thus the obtained graphene microelectrode has a porous structure, the internal cavity and pores are interlaced mutually and a three-dimensional structure is formed. Because the graphene microelectrode has a porous structure, after the glucose oxidase is fixed, direct electrochemistry of the enzyme can be achieved and the porous graphene microelectrode can be used for rapid electrochemical measurement of glucose directly. The sensor has good stability and a long service life.

The invention discloses a positioning system based on the CC2530 technology and the ZigBee technology and an achieving method thereof. The positioning system comprises a ZigBee wireless network unit based on a Z-Stack protocol stack, a wireless terminal, a module to be positioned and a power source, wherein the wireless terminal and the module to be positioned are respectively connected with the ZigBee wireless network unit, and the power source is connected with the module to be positioned. The wireless terminal obtains corresponding information of the module to be positioned through the ZigBee wireless network unit and conducts calculation based on the corresponding obtained information to obtain positional information of the module to be positioned. According to the positioning system based on the CC2530 technology and the ZigBee technology and the achieving method, the defects, such as low accuracy, large influences by reference node density and distribution and large influences by error accumulation, in the prior art can be overcome, and therefore the advantages of high accuracy, small influences by the reference node density and distribution and small influences by the error accumulation can be achieved.

The invention discloses a solar cell surface passive layer structure. A laminate passive film structure composed of a silicon dioxide passive film and a silicon nitride passive film is adopted for the structure, and therefore the defects that the interface defect density of the silicon nitride passive film is high, silicon-hydrogen bonds are not stable, the capacity for resisting metal ions of the silicon dioxide passive film is poor, moisture can be easily adsorbed and the reducing and reflecting effect of light is not good are overcome. The thickness of the silicon dioxide passive film is optimized to range from 10 nanometers to 40 nanometers, therefore, the passivating effect for electrically active impurities of silicon materials and surface defects of the silicon materials is greatly improved on the basis that the light absorbing rate is ensured, the surface recombination rate of a photon-generated carrier is obviously lowered, and the conversion efficiency of crystalline silicon can be improved by 0.3%. Meanwhile, the invention further discloses a preparing method of the solar cell surface passive layer structure. According to the method, the silicon dioxide passive film is prepared through the thermal oxidation technology, the silicon nitride passive film is prepared through the PECVD technology, and the method can be compatible with the solar cell preparing technology.

The invention discloses a carbon-coated CoAl-LDH@NF composite electrode material and a preparation method thereof. The preparation method disclosed by the invention comprises the steps of firstly utilizing cobalt nitrate and aluminum nitrate as a cobalt source and an aluminum source and foamed nickel as a substrate and obtaining Co-Al LDH@NF after one-step hydrothermal; then utilizing glucose or cane sugar as a carbon source to coat the Co-Al LDH@NF and performing hydrothermal treatment to obtain Co-Al LDH@NF@C. According to the preparation method disclosed by the invention, a substep hydrothermal-drying method is utilized, a preparation technology and required equipment are simple, raw materials are rich in source, reaction temperature is lower, high-temperature carbonization is avoided, and large-scale production is easy to achieve. The Co-Al LDH@NF@C composition material obtained through the method disclosed by the invention has good thermal stability, high crystallization degree and large specific surface area, further has strong morphology controllability and is one of ideal energy materials.

The invention discloses iron-copper alloy powder and a preparation method thereof. The iron-copper alloy powder is prepared from the following raw materials in percentage by mass: 10-30 percent of copper oxide powder and 70-90 percent of iron-copper pre-alloyed powder. The preparation method comprises the following steps: selecting the copper oxide powder prepared through roasting and crushing, uniformly mixing the copper oxide powder and the iron-copper pre-alloyed powder according to a ratio, carrying out active diffusion sintering on the mixture in a reducing atmosphere, crushing and sieving the mixture subjected to sintering, and finally preparing the iron-copper alloy powder. The iron-copper alloy powder is lower in apparent density and good in formability, has the apparent density being 2.5-3.0g / cm<3> and the green strength being 12-15MPa, makes up for the deficiencies in the prior art and broadens the application market.

The invention discloses a method for preparing a composite phase-change material used at a temperature of 2-8 DEG C. The method comprises the following steps of: (1) placing an anhydrous-sodium-sulfate raw material in a blast drying oven, and drying to be constant weight at a temperature of 90-110 DEG C; (2) according to the parts by mass of all raw materials, respectively weighing 30-50 parts ofanhydrous sodium sulfate, 5-10 parts of sodium chloride, 10-20 parts of potassium chloride, 10-20 parts of ammonium chloride, 1-5 parts of boric acid, 1-5 parts of borax, 0.5-5 parts of sodium carboxymethyl cellulose, 0.5-5 parts of hydrophilic aerogel for mixing, grinding in a ball grinder till the granularity of the mixture is 50-300mu m; (3) adding 20-50 parts of distilled water into the groundmxiture, stirring to be fused slurry at a temperature of 40-60 DEG C. The method disclosed by the invention has the advantages of simple process and lower cost; the prepared phase-change material hasthe advantages of low supercooling degree, high energy-storage density, no-phase separation, stable property and capabilities of fast cold storage and slow cold release.

A three-phase double convex pole permanent magnet brushless generator is in the structure of a stator inside and a rotor outside, the magnet and an armature winding are set on the stator fixed on the base by four installing holes, the rotor is connected with the shaft by the shell and a shaft sleeve base, four magnets are distributed uniformly along the circum at the yoke of the stator, the poles of which are distributed in N,S,S,N,N,S,S,N, 12 convex poles are uniformly distributed on the outer circum of the stator, 8 convex poles are uniformly distributed on the inner circum of the rotor and placed on the two face to face poles of the stator and two face to face vertical poles connected with them and the centralized windings of the four poles are serial to one three-phase armature winding in 120deg. difference.

The invention discloses a novel aluminum nanometer particle surface plasmon enhanced solar battery and belongs to the photovoltaic technical field. The novel aluminum nanometer particle surface plasmon enhanced solar battery is characterized in that magnetron sputtering equipment is used for depositing aluminum film inside a vacuum chamber body, and then aluminum nanometer particle array is formed through in situ annealing or nitrogen protective annealing to stimulate the surface plasmon, and photolithography is not needed; by adjusting aluminum nanometer particle size and density, resonant frequency of the surface plasmon is adjusted, and then the resonant frequency of the surface plasmon is in optical matching with forbidden bandwidth (1.2-1.7 ev) of a thin film solar battery active layer, and light absorption is improved by utilizing near-field enhanced effect and scattering effect, and therefore efficiency of a solar battery is improved. The problems that current carrier surface recombination and increased active layer defect mode density caused by utilizing texture in a traditional thin film solar battery light-trapping technology is overcome, and complex processes of wet etching, photoetching and the like are not needed, and therefore cost of the solar battery is greatly reduced.

The invention provides sponge foaming rubber for a car door sealing strip and a preparation method thereof, a car door sealing strip and a preparation method thereof. The sponge foaming rubber for the car door sealing strip, provided by the invention, is prepared from the following components in parts by weight: 20 to 40 parts of ethylene-propylene-diene monomer 9090M, 69 to 92 parts of ethylene-propylene-diene monomer V8800, 5 to 7 parts of active zinc oxide, 1 to 2 parts of stearic acid, 1 to 3 parts of a dispersant, 0.8 to 1.4 parts of erucamide, 1 to 2 parts of PEG-4000 (Polyethylene Glycol-4000), 5 to 10 parts of POE (Polyolefin Elastomer), 60 to 77 parts of paraffin oil R-2291, 30 to 50 parts of carbon black N550, 50 to 70 parts of carbon black SP5000, 1.5 to 2.5 parts of sulfur S-80, 6 to 10 parts of a moisture absorbent GR, 3 to 6.4 parts of an accelerant, 3 to 3.6 parts of a foaming agent OBSH-75 (Oxydibenzenesulfonyl Hydrazide-75) and 1.1 to 1.5 parts of a foaming agent AC3000-75. By adopting a formula of the sponge foaming rubber for the car door sealing strip, provided by the invention, the prepared sponge rubber has relatively low density and can meet a lightweight design; meanwhile, the obtained rubber also can have relatively good physical performance, so that the utilization quality of the car door sealing strip utilizing the sponge foaming rubber can also be improved.

The invention discloses a porous CoAl bimetal hydroxide@carbon fabric composite electrode material and a preparation method thereof. The preparation method comprises the steps of firstly, preparing aCo salt and Al salt mixed solution, and adding urea and ammonium fluoride for stirring and mixing; secondly, immersing the processed carbon fabric into the mixed solution, and obtaining a CoAl hydroxide loaded on the carbon fabric by hydrothermal reaction; and finally, immersing the CoAl hydroxide loaded on the carbon fabric into (0.1-0.3)mol / L of sodium hydroxide solution for normal-temperature immersion and etching to obtain the composite electrode material. The porous CoAl bimetal hydroxide@carbon fabric composite electrode material obtained by the method has favorable specific capacitancevalue and is good in cycle stability, the mechanical strength and the flexibility of the electrode are good, certain development guidance is provided for an intelligent, convenient, light and flexibleelectronic product which is constantly searched in modern science and technology, and the electrode material is one of energy materials with great development in future.

The invention provides a concrete-poured sandwich metal plate type composite armor and a manufacture method thereof. The concrete-poured sandwich metal plate type composite armor comprises a metal front faceplate, a metal back faceplate and a metal core body fixed between the metal front faceplate and the metal back faceplate, wherein the metal core body is a metal plate with the angle of theta, the metal front faceplate, the metal back faceplate and the metal core body form into a sandwich metal sandwich plate, and the concrete is poured into a hollow structure of the sandwich metal sandwich plate. The manufacture method of the concrete-poured sandwich metal plate type composite armor comprises the following steps of: 1, firstly, flattening the metal plate material by a flattening machine, blasting sand, carrying out mould pressing by a hydraulic machine or bending by a bending machine to obtain the metal plate with the angle of theta, and welding the metal core body between the metal front faceplate and the metal back faceplate layer by layer, thus forming the sandwich metal sandwich plate; 2, dosing, mixing and stirring raw materials of the concrete; and 3, pouring the concrete into the hollow structure of the sandwich metal sandwich plate, standing, and maintaining, thus obtaining a finished product. The armor provided by the invention is light in weight, low in cost, and good in ballistic performance. The preparation method of the armor is simple, and low in cost.

The invention discloses holocellulos composite aerogel and a preparation method thereof. Cellulose nano fibrils is added as a reinforcing phase in a conventional regenerated fiber aerogel preparationprocess, so that the problems that regenerated cellulose aerogel is high in density, low in specific surface area and liable to shrink in the preparation process can be solved. The preparation methodcomprises the following steps: firstly, dissolving cellulose by using a mixed system of an ionic liquid and a cosolvent; adding a cellulose nano fibrils / cosolvent suspension into the mixed system, performing uniform stirring, pouring the mixed system into a mold, further adding a regeneration solvent to form gel, performing washing by using the regeneration solvent so as to remove the ionic liquid, performing solvent exchange, and performing freeze drying or supercritical carbon dioxide, so as to obtain the aerogel. The holocellulos composite aerogel disclosed by the invention has a large specific surface area, good hydrophilcity, biocompatibility and biodegradability and stable chemical properties, and has wide application prospects in multiple fields such as biological medical materialssuch as wound repairing, antibacterial sterilization, cell culture, tissue engineering and medicine carriers.

The invention provides a doublet closed pore structure foam polymer composite material and a preparation method thereof. The composite material comprises a base material and inorganic nano-fillers, the weight of the inorganic nano-fillers accounts for 0.05wt%-1.0wt% that of the base material, the composite material is provided with large pores and small pores with closed pore structures, the porediameters of the small pores range from 0.5 micrometer to 3 micrometers, and the pore diameters of the large pores range from 5 micrometers to 30 micrometers. The preparation method includes the steps: (1) uniformly dispersing the inorganic nano-fillers into the base material to form the composite material and prepare a formed blank; (2) placing the formed blank into a reactor, increasing the temperature of the reactor to T DEG C, Tg<T<(Tg+20 DEG C), leading CO2 into the reactor until pressure in the reactor reaches 20-30MPa, keeping the formed blank in supercritical CO2 for at least 2 hours,rapidly reducing the pressure in the reactor into normal pressure, foaming the formed blank, and then cooling and shaping the formed blank to obtain the composite material.

The invention discloses a high-density semiconductive single-walled carbon nanotube horizontal array and its preparation method. The array method is a first method or a second method. The first method comprises the following steps: loading a single crystal growth substrate I with a solution of oxide nanoparticles, airing and calcining in the air atmosphere, and carrying out chemical vapor deposition so as to obtain the array on the substrate I. The second method comprises the following steps: loading a single crystal growth substrate II with a solution of oxide nanoparticles, airing and annealing, calcining in the air atmosphere, and carrying out chemical vapor deposition so as to obtain the array on the substrate II. Problems of low density, strong etching, many defects and the like existing in present prepared semiconductive single-walled carbon nanotube horizontal arrays are overcome. The method of the invention is simple and easy to control, is low-cost, has good repeatability, has no metal catalyst residue, and has a wide application prospect in high-end fields of nano-electronics devices, biological medicine and catalytic synthesis, etc.

The invention discloses a preparation method of a multi-ceramic composite coating. The method comprises the following steps of 1, preparing oxide / silicon carbide / aluminum composite powder for thermalspraying, wherein oxides include one to four of a zirconium oxide, a titanium oxide, a hafnium oxide, a tantalum oxide, a niobium oxide, a vanadium oxide, a chromic oxide, a molybdenum oxide and a tungsten oxide; 2, performing pretreatment on the surface of a substrate material needing to be coated; 3, adopting a thermal spraying method for coating the surface of the substrate material with the oxide / silicon carbide / aluminum composite powder. Accordingly, the multi-ceramic composite coating is obtained through in-situ synthesis. The defects that in the prior art, the technology for preparing the multi-ceramic composite coating is complete, high in cost, large in contamination, low in deposition efficiency, poor in coating performance and not suitable for application in large-scale industrial production are overcome.

The invention discloses a fast growing wood bending method. The fast growing wood bending method comprises the following operation steps: (S1) primary compression: a wood to be bent is perpendicular to lines for compression; (S2) softening: the primarily compressed wood is put in softening liquid for softening; (S3) compression: the softened wood is compressed along with the lines; and (S4) bending: bending assistant is uniformly coated on the convex surface of the bent wood; and the wood is put on a wood bending machine for bending to produce a finished product. As a fast growing wood is weaker in quality, the fast growing wood is rarely bent; and the fast growing wood bending method is simple in operation steps, is safe and environment-friendly in operation process, is better in quality of the bent fast growing wood, widens the application range of the fast growing wood, and improves the use value.

The invention relates to a brain function connectivity detection system based on self-adaptive priori information guidance and a brain function connectivity detection method utilizing the system. The method comprises the steps that S1, blind source signal separation is performed separately on functional magnetic resonance data of all single-subjects in group-subjects collected by the same mask through an independent component analysis method, so independent functional components corresponding to all the single-subjects are obtained; S2, adaptive prior information used for guiding functional magnetic resonance data analysis on the group-subject and single-subject levels is extracted from the functional components corresponding to all the single-subjects; S3, by utilizing the adaptive prior information, based on a multi-objective optimization framework, in combination with a weight summing algorithm and a fast fixed-point algorithm, blind source signal separation is performed on the functional magnetic resonance data on the group-subject level, group functional components reflecting all subject commonalities in the group are obtained, so that brain function connectivity detection is completed. The brain function connectivity detection system can position a brain function connectivity area more accurately.

The invention discloses a three-dimensional nano composite electrode material for electrochemical energy storage and a preparation method thereof. The three-dimensional nano composite electrode material for electrochemical energy storage is formed by compounding two or more than two nano carbon materials, a conductive agent, a binder and a supercapacitor electrode material or a lithium ion batteryelectrode material. The preparation method of the three-dimensional nano composite electrode material for electrochemical energy storage comprises the steps: preparation of the three-dimensional nanocomposite electrode for the supercapacitor and preparation of the three-dimensional nano composite electrode for the lithium ion battery. According to the invention, two or more nano carbon materialsand a conductive agent are introduced to carry out composite modification on the supercapacitor or lithium ion battery electrode material; through the optimization of a compounding method and the full exerting of the synergistic effect of various nano carbon materials and the conductive agent, the three-dimensional nano composite electrode material disclosed by the invention is high in assembly density, good in conductivity, excellent in rate characteristic and electrochemical stability, simple in preparation process, green, environment-friendly, low in cost and suitable for large-scale production.

The invention relates to a single crystal growth device capable of regulating and controlling a crystallization solid-liquid interface in real time and a use method. The device comprises a crucible, a growth mold and a transmission system. Through the synergistic effect of the transmission system and the growth mold, the function that the height of the growth mold can be adjusted up and down under different growth conditions in the crystal growth process is achieved, the problem that a solid-liquid interface is unstable in beta-Ga2O3 single crystal growth is effectively solved, andby using a traditional crystal growth technique such as edge-defined film-fed crystal growth, the stability of the large-size beta-Ga2O3 single crystal in the growth process and the integrity of the single crystal are greatly improved. The invention overcomes the problems of crystal spiral growth, quality fluctuation, high defect density, crystal cracking and the like caused by solid-liquid interface instability in the crystal growth process, and the single crystal length and the crystal quality are improved.

The invention discloses a liquid level measuring method, device and system, a storage medium and a processor. The method comprises following steps: the first liquid level information of the current liquid level is obtained by an image liquid level measuring device, and the first differential pressure information of the current liquid level is obtained by a differential pressure transmitter; the first differential pressure information is matched with the first liquid level information; if the first differential pressure information fails to match the first liquid level information, the first zero point and the first range of the differential pressure transmitter are adjusted; and actual liquid level information of the current liquid level is obtained according to the adjusted first zero point, the adjusted first range and the first differential pressure information; if the first differential pressure information and the first liquid level information are successfully matched, the actualliquid level information of the current liquid level is obtained according to the first zero point, the first range, and the first differential pressure information. The invention solves the technical problem that the liquid level measurement by the differential pressure transmitter is greatly affected by the density of the liquid and the gas above the liquid in the prior art, and the detection precision is lowered.

The invention provides a method and a device for monitoring late frost damage to crops based on remote sensing data. A monitoring area is gridded. For each grid point, the meteorological data of a meteorological station in the crop growth period is acquired on one hand, and on the other hand, the meteorological data in the remote sensing data in the crop growth period is extracted. The two types of meteorological data are assimilated to obtain assimilated meteorological data. Based on the assimilated meteorological data, the growth of crops on the current day is determined, and the biologicalcharacteristics of the crop canopy are determined. The temperature data of the crop canopy on the current day is determined according to the biological characteristics of the crop canopy and the meteorological data on the current day. The late frost damage area on the current day is determined according to the temperature data of the crop canopy on the current day. Therefore, remote sensing data and ground real-time monitoring data are combined in the monitoring process of late frost damage, the shortcoming of the method relying on ground real-time monitoring data only is overcome, and the monitoring precision of late frost damage is improved.

The invention discloses a growth method for a buffering layer of an expanding wavelength near-infrared detector. The method comprises the following steps: adopting a metallic organic chemical vapor deposition process or a molecular beam epitaxy process for growing one of an In<x>Ga<1-x>As low temperature layer, an InAs<y>P<1-y> low temperature layer and an In<z>Al<1-z>As low temperature layer on an InP substrate at a first temperature; increasing the temperature of the InP substrate to a second temperature, and annealing the In<x>Ga<1-x>As low temperature layer, InAs<y>P<1-y> low temperature layer or In<z>Al<1-z>As low temperature layer; and growing one of an In<w>Ga<1-w>As component gradient layer, an InAs<w>P<1-w> component gradient layer and an In<w>Al<1-w>As component gradient layer at a third temperature, wherein the second temperature is higher than the first temperature and the third temperature is higher than the second temperature. According to the growth method, the thickness of the buffering layer can be reduced, the dislocation density can be reduced, and thus a detector with excellent high speed performance can be acquired.

The invention provides a cheese fiber removal method for producing hemp / cotton and linen / high count cotton yarns, which comprises the following steps of: (1) winding blended spinning single yarns or blended spinning compound yarns on a loose type cheese winder into cheese; (2) controlling the following production conditions on a cheese dyeing machine: a temperature of between 60 and 100 DEG C, a liquor ratio of between 1:10 and 1:30, water exchange times of 1 to 6, a specific discharge of 50 to 70L / kg.min, and fiber removal time of 1 to 6 hours; and (3) removing water soluble PVA fibers from the cheese to obtain high count single yarns or high count compound yarns of hemp / cotton or linen / cotton. The single yarns or the compound yarns obtained after fiber removal by the method have the advantages of uniform fiber removal, capability of realizing high-speed unwinding without winding, and capability of being directly used in post processing of weaving and knitting, thereby laying the foundation for revealing the superior performances of the hemp / cotton and the linen / cotton, widening the application scope of hemp / cotton and linen / cotton products, and producing thin hemp / cotton and linen / cotton products with high quality.

The invention relates to a photo-Fenton-positive permeation integrated device for treating organic wastewater difficult to biodegrade and a using method of the device. The device comprises a photo-Fenton unit and an immersed positive permeation unit. The method for treating the water by using the device comprises the photo-Fenton process and the positive permeation process, and while organic pollutants are effectively degraded or converted by using the photo-Fenton unit, the organic pollutants which are not completely degraded or converted in the photo-Fenton process are permselectively intercepted by using a positive permeation membrane. The immersed positive permeation unit adopts an immersed positive permeation structure, a water inlet end circulating pump or an inlet water tank is notneeded, the overall structure is compact, the energy consumption is low, and the photo-Fenton-positive permeation integrated device is easily combined with other technologies or devices. Active substances generated by the photo-Fenton unit are used up in the pollutant degradation and converting process and in the positive permeation unit migration process, the strong oxidizing property of the photo-Fenton unit cannot affect the stability of the membrane, the wastewater treatment efficiency is high, the wastewater treatment effect is good, and the device is suitable for application and popularization.