43results about How to "Solve serious problems" patented technology

The invention discloses a fine flaky-cryptocrystalline mixed graphite separation technique which comprises the following steps: primary rough grinding and rough separation, quintic regrinding and sextic concentrating, and middling centralized processing. According to the technique, in the rough separation step, the grinding fineness is -0.074mm, and the content is 90-95%; in the concentrating step, the regrinding fineness is -0.045mm, and the content is 90-95%; and thus, the graphite monomer is sufficiently dissociated, thereby sufficiently ensuring the fixed carbon content and recovery rate of the concentrated concentrate. The technique adopts gradually decreased low concentrating concentrations in multiple concentrating process to ensure the dispersity of ore slurry, thereby solving thesevere problem of entrapped impurities in floatation foam; and thus, in the final concentrate, the fixed carbon content is 91.35%, and the recovery rate is 91.30%, thereby solving the problems of lowtechnical indexes, low grade, low recovery rate and high cost in the fine flaky-cryptocrystalline mixed graphite concentrate separation, so that the fine flaky-cryptocrystalline mixed graphite ores are utilized in an efficient, economical and reasonable way.

The invention provides a water-boiling-resistant and flame-retardant polypropylene composite material with a high glow-wire ignition temperature and a preparation method. The water-boiling-resistant and flame-retardant polypropylene composite material with the high glow-wire ignition temperature is composed of the following materials: 72-76 parts of PP resin, 24-28 parts of a nitrogen phosphorus intumescent-type flame retardant, 0.1-0.2 part of an anti-dripping agent, 0.2-0.3 part of an antioxidant, 0.4-0.6 part of a lubricant, and 0.1-0.2 part of a high-efficiency synergist. The flame-retardant polypropylene composite material prepared by the method guarantees the material to pass a UL94 1.6mm-V0 test and achieve high-efficiency flame retardance, and at the same time the flame-retardant polypropylene composite material has performance such as a high glow-wire ignition temperature (875 DEG C, GWIT), water boiling resistance (100 DEG C), precipitation resistance, low smoke and thermal oxygen ageing and discoloring resistance (150 DEG C).

The invention relates to a movable three-arm top-assisting anchor rod and anchor cable construction drill carriage which comprises a caterpillar travelling part, an engine body platform, a base seat, drilling arm parts, hydraulic drill rig devices, an operating system, a pump station part and an electric motor, wherein the hydraulic drill rig devices are arranged on the tops of the drilling arm parts; the operating system, the pump station part, the electric motor and the like are installed at the rear on the engine body platform; the construction drill carriage is characterized in that the construction drill carriage is provided with three sets of independent drilling arm parts and hydraulic drill rig devices which are respectively arranged at the left, the middle and the right of the base and are installed on the base; the base is fixedly arranged on the engine body platform; and the drilling parts and the hydraulic drill rig devices which are arranged at the left and the right sides can slide outwards. The construction drill carriage lightens the labor intensity of constructors, reduces the number of the constructors, improves the advancing speed and the operation efficiency, creates safe operation environment, and has the functions of automatically moving, lifting, double platforms, synchronous construction of top-assisting anchor rod and anchor cable, ultrahigh laneway supporting and protecting, etc.

The invention discloses a formation method for an irregularly-shaped hole of a printed circuit board. The formation method comprises the steps of drilling at least two first pre-drilling holes in an Ahole reservation position; drilling at least two second pre-drilling holes in a B hole reservation position; respectively drilling remaining parts at the reservation positions according to the shapesand the sizes of the A hole and the B hole so that the A hole and the B hole intersect and the irregularly-shaped hole is formed. According to the formation method for the irregularly-shaped hole ofthe printed circuit board, provided by the invention, hole formation can be prevented, and the hole accuracy of the irregularly-shaped hole can be improved.

The invention belongs to the field of organic synthesis, and specifically a method for preparing furfuraldehyde through hemicellulose by use of a continuous flow microchannel reactor. The method comprises the following steps: controlling a mole ratio of the hemicellulose aqueous solution containing polymerization inhibitor to a catalyst through a metering pump; enabling the hemicellulose aqueous solution and the catalyst to enter the micro channel reactor to perform the mixing reaction; after the mixing reaction is finished, continuously passing through a series of enhanced mass transfer type micro-channel modules and a flow type micro-channel module, after the reaction process is finished, enabling the product to flow out from the outlet of the reactor and then enter a gas-liquid separator to perform the gas-liquid separation, wherein the furfuraldehyde and water vapor mixed gas enters a fractionating tower after being discharged from an upper gas-guiding tube through a throttling valve, and the liquid falls into the separator. By use of the method disclosed by the invention, the hemicellulose recycled by the waste lye in a chemical fiber industry is used as the raw material, the hemicellulose is directly converted into the furfuraldehyde by use of the continuous micro-channel reactor; by use of the way of separating and recycling the catalyst, the yield and the economic benefit are improved, the pollution is lowered, and the ecologic environment is greatly improved.

The invention discloses an under-forest konjak annual plantation method comprising following steps: (1) forest land selecting; (2)wild konjak ecological environment imitating; (3) forest land reclaiming; (4) konjak cormlet selecting; (5) konjak cormlet disinfecting; (6) sowing; (7) weeding; (8) konjak planted forest land overwintering; (9) harvesting. The method adopts under-forest plantation of konjak to realize the original ecological planting from the forest to the forest, and creates the habitat close to the origin of the konjak, satisfies the requirement on external environment for konjak; the purposes of healthy planting and healthy growth are fulfilled. The method of under-forest plantation of konjak has advantages such as good growth condition, low water content in seed konjak, and safe overwintering in forest land; the konjak can be directly transplanted in field in the second spring, the seed konjak has good quality, low bacterium, and high emergence rate; there is no need to harvest seed konjak in the autumn and to winter indoor, which is labor saving and reduces production processes.

The present invention discloses a venule vascular disease therapeutic instrument. The instrument comprises: a light-gathering cavity consisting of a pumping source and a gain medium of the same optical path; a resonant cavity configured to perform frequency multiplication of light emitted by the gain medium and consisting of a total reflective mirror, a regulation Q device, a frequency doubling crystal, an output mirror, a fiber coupling lens and a coupling fiber of the same optical path, wherein the regulation Q device and the frequency doubling crystal are respectively located at two opposite light emitting sides of the gain medium; temperature control cooling systems are respectively arranged at the light-gathering cavity and the frequency doubling crystal; the gain medium is single-added Nd: YAG laser bar or double-added Nd : YAG laser bar, the two ends of the laser bar and the external layer of the cylindrical surface are provided with pure YAG crystal without Nd and Ce ions; and the two ends of the laser bar pure YAG crystal are plated with a dielectric film having a 1064nm waveband transmissivity being not less than 99%. The venule vascular disease therapeutic instrument provided by the invention can solve the problems that the common straight cavity efficiency is low, the V-shaped cavity batch production cost is high and the thermal effect is severe under the large energy pumping, etc.

The invention relates to 6-series aluminum alloys. The 6-series aluminum alloys are composed of the following components in percentage by weight: 0.75-1.1% of magnesium, 0.01-0.02% of titanium, 0.06-0.13% of manganese, 0.5-0.7% of silicon, 0.55-0.7% of copper, 0.005-0.01% of strontium, 0.002-0.008% of pickaxe, not more than 0.13% of iron, not more than 0.01% of zinc, not more than of 0.01% of chromium and the balance of aluminum. The invention also relates to a preparation method of the 6-series aluminum alloys. The 6 series aluminum alloys have the advantages that alloy mechanical propertiesare obviously improved and glossiness is high after the alloys are subjected to highlight oxidation.

The invention relates to encapsulated emamectin benzoate microspheres and a preparation method thereof. The preparation method of the present invention solves the problems of low encapsulation efficiency and drug surface crystallization in traditional methods for preparing emamectin benzoate microspheres, alleviates environment stress caused by traditional non-degradable wall materials such as polyureas, polyurethane, and the like, and solves the problem of overquick burst release easily seen in traditional pesticide microspheres. The encapsulated biodegradable emamectin benzoate microspheres of the invention is wide in control spectrum, high in drug effect, strong in stability, less in environment pollution, long in lasting period, and low in control cost, and meets the requirements for pollution-free agricultural production.

The invention discloses a belt sweeping device, which comprises a belt bracket. A driving device is mounted on the belt bracket and provided with a belt cornerite increasing wheel and a driving gear mounted on a cornerite increasing wheel axle; a pre-sweeping device is mounted on one side of the driving device and comprises a pre-sweeping roller and a pre-sweeping brush, and a discharging hopper is arranged at a discharging opening of the pre-sweeping roller; a fine sweeping device is mounted on the other side of the driving device and comprises a fine sweeping roller and a fine sweeping brush; and a receiving box is arranged at a discharging opening of the fine sweeping roller, and the bottom of the receiving box communicates with a discharging pipeline. The belt sweeping device has the advantages of being economical, practical, simple in structure, convenient to mount and use, capable of saving energy, environmentally friendly, high in sweeping efficiency, low in production operatingintensity and the like, and is suitable for belt conveyor sweeping work of material processing industries, the problem that the onsite environment is difficult to dispose due to the fact that duringreturning, materials adhere to a belt is effectively solved, manpower resources are saved, and pollution is reduced.

The invention belongs to the field of slab polishing, and particularly relates to a polishing method for a stainless steel continuous casting rolled slab 00 section. The method comprises the steps of step 1, placing the stainless steel continuous casting rolled slab 00 section onto a polisher lathe and polishing the superficial black skins of the 00 section, wherein the grinding head is 40mm in feed rate and 2500 in pressing parameter; step2, polishing once at the position 3m away from a slab outlet end with the grinding head feed rate being 30mm and the pressing parameter being 3000, polishing once at the position 2m away from the slab outlet end and polishing once at the position 1m away from the slab outlet end; step 3, if a few blended defects still exist, performing point polishing with the grinding head feed rate being 40mm and the pressing parameter being 2500 until naked eyes cannot see the defects; step 4, adopting the same steps as the steps 1, 2 and 3 to perform polishing on the second face after steel turning. The polishing method solves the problem that the blended impurities can not be cleaned in the polishing process of the stainless steel continuous casting rolled slab 00 section.

The invention discloses a method using Artemisia selengensis to remedy soil mildly and moderately polluted by heavy metal. The method includes the steps of firstly, selecting Artemisia selengensis variety; secondly, preparing a field, to be more specific, applying thoroughly decomposed organic fertilizer, evenly raking and flatly ploughing soil and the fertilizer, and ridging; thirdly, performingpre-emergence weeding, to be more specific, spraying a pre-emergence herbicide before cuttage, and performing soil spraying processing; fourthly, raising seedlings by cutting, to be more specific, collecting robust Artemisia selengensis branches from the field, cutting off leaves and tender shoots on the middle and lower portion, compacting the soil after the cuttage, and watering to allow the water content of the soil to be saturated; fifthly, performing water management, to be more specific, keeping the field moist due to the fact that Artemisia selengensis is a wetland plant and is intolerant to drought; sixthly, performing field weeding, to be more specific, performing manual weeding to remove cyperaceae and dicotyledonous weeds; seventhly, performing disease and pest control; eighthly, harvesting the overground part of Artemisia selengensis, and removing withered branches and leaves from the field; ninthly, performing harmless treatment on the harvested Artemisia selengensis. Themethod is practicable, simple to operate, low in cost, high in heavy metal removing efficiency and capable of satisfying the remediation and treatment requirements of the soil mildly and moderately polluted by heavy metal in southern China.

The invention relates to a bezafibrate slow release pharmaceutical composition which comprises a bezafibrate material which accounts for 60% of total weight of the slow release pharmaceutical composition and has the particle size of 40-80 meshes, more than one slow release auxiliary material, and more than one pharmaceutically acceptable non-slow release auxiliary material. The bezafibrate slow release pharmaceutical composition prepared is stable in medicine releasing property, and solves the problem that the medicine is easy to release abruptly in the early stage of medicine delivery and the release differences among releasing spot films are greater.

The invention discloses a transformer multi-source partial discharge mode identification method based on a parallel feature domain. The method comprises the steps: extracting multi-source partial discharge signals to construct a multi-source partial discharge time domain signal set and a time-frequency domain signal set; combining a plurality of single neural network automatic encoders into two stacked encoders; selecting a sigmoid function as an activation function between the stacked encoder network layers, and obtaining an activation value of the next network layer by using the activation function; adding a regularization item to a loss function for adjusting each layer of network parameters in the stacked encoder; setting an optimization solution method of the loss function as a near-end guide random sub-gradient algorithm; adding softmax as a classification layer of the neural networks; and carrying out parallel training on the multi-source partial discharge time domain signal setand the time-frequency domain signal set by using the stacked encoder, wherein feature matrix data has corresponding labels, and a classification result is compared to finely adjust network parameters. The method has the advantages of high classification precision, strong generalization ability of a deep learning model and the like, and is suitable for occasions such as multi-source partial discharge mode identification of a transformer.

The invention belongs to the field of xylose production and particularly relates to a method for passing hemicellulose through a continuous flow microchannel reactor to prepare xylose; the method comprises the steps of introducing the materials required in reaction, hemicellulose solution and a catalyst, into a mixing module first, introducing into the microchannel reactor for preheating, and controlling the flowing speed of the hemicellulose solution and catalyst through flow control; passing the hemicellulose solution and catalyst through their respective metering pumps, synchronously charging into the mixing module, after passing through a preheating module, charging into an enhanced mass transfer module to carry out mixing reaction, after mixing and hydrolysis in this module, continuously passing through a series of enhanced mass transfer microchannel modules and direct flow microchannel modules, and after the reaction is over, refining the obtained reaction liquid to obtain xylose. The method has the advantages that hemicellulose recycled from chemical fiber industry alkaline wastewater can be used as a raw material, the hemicellulose is directly hydrolyzed into xylose through the continuous flow microchannel reactor, and all the aspects, such as yield, economic benefit, pollution reduction and ecological environment improvement, can be improved greatly.

The invention discloses an air conditioner auxiliary defrosting method and control device, a storage medium and an air conditioner, and relates to the field of air conditioners. The air conditioner auxiliary defrosting method comprises the following steps that S100, in a heating mode, the indoor real-time temperature T<room temperature> is detected, the operation stage of the air conditioner is judged based on the indoor real-time temperature T<room temperature> and the indoor target temperature T < target >; S200, based on an operation stage, the real-time temperature T<outer disc> of an outer coil pipe is detected, controlling an auxiliary heating unit is carried out according to the real-time temperature T<outer disc> of the outer coil pipe and the preset temperature T<2> of the outer coil pipe; and the air conditioner enters a reverse circulation defrosting mode based on the preset temperature T<2> of the outer coil pipe. According to the conditioner auxiliary defrosting method andcontrol device, the storage medium and the air conditioner, on the basis of not affecting a refrigerating and heating system of the air conditioner, heating an outdoor heat exchanger in an auxiliarymode is carried out, the problem that frost layers or ice layers at the bottom of the outdoor heat exchanger are seriously accumulated is solved, and the unit performance is improved to a certain extent.

The invention discloses a composition capable of reducing continuous cropping sesame yield loss in red soil dry land, and a method. The composition is composed of a soil fertilizer and disinfectant A,and a continuous cropping resistant agent B; the soil fertilizer and disinfectant A is composed of, by mass 42 parts of a biological organic fertilizer taking cow dung as the main ingredient, whereinthe total content of N, P, and K is equal to or larger than 6%, 12 parts of urea, 30 parts of calcium magnesium phosphate fertilizer, 10 parts of potassium chloride, 2 parts of borax, 2 parts of quintozene, and 2 parts of carbendazim, and the total content of the soil fertilizer and disinfectant A is 1500kg / hm<2>; the continuous cropping resistant agent B is composed of 6 parts of 40% flusilazoleand 40 parts of 25% kresoxim-methyl, and the water adding amount of the continuous cropping resistant agent B is controlled to be 750kg / hm<2> at seedling stage and 900kg / hm<2> at flowering phase. Thecomposition and the method are capable of improving red soil dry land sesame plantation technology, reducing continuous cropping sesame yield loss, and improving continuous cropping sesame benefit.

The invention discloses a fine flaky-cryptocrystalline mixed graphite separation technique which comprises the following steps: primary rough grinding and rough separation, quintic regrinding and sextic concentrating, and middling centralized processing. According to the technique, in the rough separation step, the grinding fineness is -0.074mm, and the content is 90-95%; in the concentrating step, the regrinding fineness is -0.045mm, and the content is 90-95%; and thus, the graphite monomer is sufficiently dissociated, thereby sufficiently ensuring the fixed carbon content and recovery rate of the concentrated concentrate. The technique adopts gradually decreased low concentrating concentrations in multiple concentrating process to ensure the dispersity of ore slurry, thereby solving the severe problem of entrapped impurities in floatation foam; and thus, in the final concentrate, the fixed carbon content is 91.35%, and the recovery rate is 91.30%, thereby solving the problems of low technical indexes, low grade, low recovery rate and high cost in the fine flaky-cryptocrystalline mixed graphite concentrate separation, so that the fine flaky-cryptocrystalline mixed graphite ores are utilized in an efficient, economical and reasonable way.

The invention relates to a single-curved-arc-surface tempered glass production device and method. Certain included angles are formed between the axes of forming wheels and the axes of main beams, in the cold quenching process, multiple blowing spray nozzles belonging to the lower portion of a forming section and glass keep the same normal distance, the axes of the forming wheels are not vertical to the main beams where the forming wheels are installed, the formed included angles are identical, all the forming wheels rotate synchronously and have the same rate, and the motion trail of the glass bent into a single curved arc surface relative to a single curved arc surface formed by external diameter buses of all the forming wheels is a spiral line. The problem that tempered wind spots of current single-curved-arc-surface tempered glass are serious is well solved, and the optical quality of a product is improved.

The invention discloses a cultivation method for early-maturing high-quality grapes, and relates to the technical field of agriculture planting. The method comprises the steps of variety selection, dormancy stage breaking, cultivation, rational close planting, fertilizer and water management, pest control, rational inflorescence thinning, bud leaving and bud picking, bearing branch and vegetative branch ratio adjusting, fruit bagging and maturing and harvesting. Accordingly, the grapes come into the market 30 days earlier compared with main producing areas, and the domestic market gap is filled up; rain-preventing cultivation is conducted through a multi-span greenhouse, and germ infection is reduced; in addition, by selecting an opened areas good in ventilation, making a high ridge, building a high frame, conducting rational close planting and thinning flowers and fruits, canopy is avoided, ventilation is increased, and the sources of the diseases are reduced; by means of the technologies such as formulated fertilization and fruit bagging, pests are controlled scientifically and systematically, a set of new American grape southern area pollution-free cultivation technology is found out, the problem that the grapes suffer from serious diseases in the south is successfully solved, the stable yield and the high yield are kept in successive years, and the targets of the high yield, good quality, high efficiency and ecology are successfully achieved.

The invention relates to a device and method for producing tempered glass with a single-curved arc surface. By setting a certain angle between the axis of the forming wheel and the axis of the main beam, and during the quenching process, a plurality of parts belonging to the lower part of the forming section The blowing nozzles keep the same normal distance from the glass, the axis of the forming wheel is not perpendicular to the main beam on which it is installed, and the angles formed are the same, and all the forming wheels rotate synchronously and at the same speed to realize bending into a single curved arc The trajectory of the glass on the surface is a spiral line relative to the single-curved arc surface formed by the outer diameter generatrix of each forming wheel, which solves the serious problem of tempered glass tempered wind spots on the current single-curved arc surface, and improves the optical quality of the product. quality.

The invention relates to a passive distributed removable intelligent haze removal system and method. The system comprises a cloud system, at least one intelligent terminal and at least one haze removal framework, wherein the haze removal framework is mounted at a roof of a motor vehicle and is used for purifying air containing PM2.5 pollutants; the intelligent terminal(s) is / are used for controlling the haze removal framework to filter the air and calculating a haze removal amount; and the cloud system is used for sending information to the intelligent terminal(s), receiving information of the intelligent terminal(s) and making statistics. The system and the method can realize the functions of sustainable mobile haze removal, haze removal through a city and real-time haze removal. With adoption of the haze removal system, the problem of serious outdoor haze can be effectively solved, and especially, the problem of haze caused by automobile exhaust and road dust is solved; and meanwhile, energy does not need to be supplied for the system, so that secondary pollution is not caused.

The invention discloses a method for preventing and treating the leaf scorch disease of walnuts, and belongs to the technical field of agriculture. The method for preventing and treating the leaf scorch disease of the walnuts comprises the following steps of irrigating a biological agent when a new root system begins to grow, irrigating a fertilizer in the first peak period of root system growth, spraying a foliar fertilizer, preventing and treating the rot disease of the walnuts, regulating and controlling soil alkali pressing, spraying a pesticide mixed solution in the early stage of symptom development, irrigating the biological agent in the peak period of symptom development, and performing conventional field management. The prevention and treatment method provided by the invention effectively prevents and treats the leaf scorch disease of the walnuts, and avoids the phenomena that walnut leaves are brown and lose the photosynthesis capacity, so that the nutrient reserve of a tree body in the later period is reduced, and the fruiting amount and the fruit plumpness of walnuts in the next year are influenced; and according to the prevention and treatment method provided by the invention, the leaf scorch disease of the walnuts is prevented and treated, meanwhile, the tree vigor is effectively enhanced, the yield and the quality of the walnuts are improved, the economic benefits of the walnut industry are effectively improved, and effective guarantee is provided for sustainable development of the walnut industry.

The invention discloses an antheraea pernyi larva low-temperature stress induced resistance breeding method, and relates to the technical field of antheraea pernyi breeding. The method comprises the following step: S1, parent matching: carrying out parent screening, namely selecting high-yield, high-quality and high-feed conversion efficiency Liao silkworm 582 as a female parent, and selecting an antheraea pernyi variety with strong disease resistance as a male parent, and preparing the selected female parent and male parent into a hybrid combination. According to the method, the modes of excellent variety hybridization and excellent variety selection are set, low-temperature stress screening pressure is applied to the antheraea pernyi larva by simulating low-temperature cold damage climate conditions on the basis of manual selection from the F2 generation, and 6 generations are applied so that the method has higher reliability and pertinence aiming at the breeding target; and therefore, the problem that tussah diseases are serious due to low temperature and cold damage when the tussah is bred in the field tussah garden is solved, and meanwhile the stability and the high yield of the stocking yield of the tussah in the field tussah garden are guaranteed.

The invention discloses a preparation method of traditional Chinese medicine pills for treating acute tonsillitises and acute ulcers. The method sequentially comprises the following steps: compounding the following raw materials in parts by weight: 25 to 35 parts of borax (calcined), 15 to 25 parts of coptis chinensis, 2 to 4 parts of gallnut, 1 to 2 parts of human nail, 1 to 2 parts of pearl powder, 3 to 9 parts of asarum sieboldii, 2 to 4 parts of calculus bovis factitius, 6 to 10 parts of borneol, 8 to 12 parts of venenum bufonis, 2 to 3 parts of muscone, 12 to 18 parts of water buffalo horn concentrated power and 0.5 to 1.5 parts of bear gall powder; coarsely crushing, grinding and evenly mixing; preparing bear gall water; preparing pills; drying plain pills; selecting the pills; coating the pills with plant soot and polishing; and drying the pills coated with the plant soot; and coating the pills with zein films. The method is simple in process and low in medicinal material loss, and can ensure that all components in each of the prepared pills is within the range of prescriptions. The traditional Chinese medicine pills prepared by using the method have the functions of clearing away heat and toxic materials as well as relieving swelling and pain, and are suitable for treating swelling and pain in throat, single and double acute tonsillitises, ulcers, sores, furuncles and pyogenic infections.

The invention relates to a dust control and removal method and system for a driving working face of a driving and anchoring all-in-one machine, and belongs to the technical field of mine dust control. Dust generated in the production process of the driving and anchoring all-in-one machine is moved to the rear side of the driving and anchoring all-in-one machine or an anchor rod trolley, so that the problem that the production process is limited by the driving working face of the driving and anchoring all-in-one machine is solved; and then, dust treatment is carried out through a high-power dust removal fan which moves along a slide way along with the digging and anchoring integrated machine. According to the invention, a mode of'moving dust at first and post-treating 'is adopted, and large dust removal equipment is post-positioned, so that the problems caused by space limitation are solved, the treatment air volume is larger, efficient collection and treatment of dust on the driving working face of the driving and anchoring integrated machine are realized, the theoretical dust falling rate reaches 100%, and the actual dust falling efficiency can reach more than 90%; and the working environment can be obviously improved. In addition, the method has the advantage of low cost and high popularization value.

The invention relates to a PEG2, n-lipid derivative modified nano-carrier, a preparation method and application, and belongs to the technical field of medicines. A method capable of eliminating an ABC phenomenon caused by a PEGylation nano-carrier is provided, a modification material used by the nano-carrier is a PEG2, n-lipid derivative of PEG2, n, and forms a compact hydration layer on the surface of the carrier, so that the physical stability and the biological stability of the carrier are improved. Besides, the PEG2, n-lipid derivative of PEG2, n is selected to modify the nano-carrier, so that the ABC phenomenon caused by the PEGylated nano-carrier can be eliminated, and the severe problem of the existing PEGylated carrier is greatly solved; and the in-vivo circulation time of the nano-carrier is also ensured, the defect of insufficient circulation time of many PEG substitute materials is overcome, and a firmer foundation is laid for clinical transformation of a PEGylated nano-preparation.

The invention provides a comprehensive two-dimensional gas chromatography quantitative analysis method of an aromatic sterane compound in petroleum. The method comprises the following steps: fully dissolving and soaking crude oil with a solvent and then filtering to obtain a filtrate; heating to evaporate and concentrate the filtrate to prepare filtrate concentrate; collecting a saturated hydrocarbon group component and an aromatic group component; preparing a saturated hydrocarbon group component sample and an aromatic group component sample and storing the samples at low temperature; analyzing the two samples by using a comprehensive two-dimensional gas chromatograph and a flight time mass detector; performing data processing on spectrograms obtained in the steps to obtain corresponding retention time and peak area integration result. The analysis method can be used for performing full oil analysis and group component analysis; an orthogonal separation system thereof can completely separate the aromatic steroid hydrocarbons from alkane, so that the problems such as common rolling peak, base line interference and insufficient peak capacity can be excellently solved, and the aromatic sterane compound can be accurately measured.

The invention discloses a rapid separation device for protein and starch in wastewater produced during starch processing. The rapid separation device comprises a separation device body, a starch collecting device, a foaming device and a skimming device, wherein the separation device body comprises a cylinder section and an inverted cone section; the top end of the cylindrical section is open, anda feed port is formed in the side wall of the cylindrical section; the feeding port is tangentially formed relative to the inner wall of the cylindrical section; the inverted cone section is connectedto the bottom end of the cylindrical section and is provided with a liquid discharge pipe; the starch collecting device communicates with the bottom end of the inverted cone section; the foaming device is mounted in the separation device body; and the skimming device is arranged at the top of the separation device body. The invention also discloses a corresponding separation method. According tothe device and the method in the invention, protein and starch can be separated from the wastewater produced during starch processing at the same time, low-cost resource utilization of the wastewaterproduced during starch processing is achieved, and the requirement for large daily treatment capacity of the wastewater produced during starch processing can be met; and operation is simple and rapid,conditions are mild, complex equipment is not needed, and high-quality starch and protein can be obtained.

The invention relates to 6-series aluminum alloys. The 6-series aluminum alloys are composed of the following components in percentage by weight: 0.75-1.1% of magnesium, 0.01-0.02% of titanium, 0.06-0.13% of manganese, 0.5-0.7% of silicon, 0.55-0.7% of copper, 0.005-0.01% of strontium, 0.002-0.008% of pickaxe, not more than 0.13% of iron, not more than 0.01% of zinc, not more than of 0.01% of chromium and the balance of aluminum. The invention also relates to a preparation method of the 6-series aluminum alloys. The 6 series aluminum alloys have the advantages that alloy mechanical propertiesare obviously improved and glossiness is high after the alloys are subjected to highlight oxidation.