791 results about "Supersaturation" patented technology

The invention relates to a traffic control method and system based on an intersection group.The method comprises the steps that 1, 360-degree panoramic video of intersections is dynamically collected in real time through an intelligent robot, an intersection operation model is established according to video data, and traffic characteristics of the intersection group are analyzed according to the intersection operation model; 2, intersection index evaluation and online simulation analysis are conducted according to the traffic characteristics, and the traffic operation state of the intersection group is identified; 3, supersaturation state intersection signal timing control scheme optimization is conducted on critical paths of a supersaturation state intersection group, and a supersaturation state intersection group traffic signal control strategy is adjusted; 4, the adjusted intersection group traffic signal control strategy is operated, and steady-state operation of an intersection control signal timing optimization scheme and linkage command of the intelligent robot are achieved.By means of the traffic control method and system based on the intersection group, traffic efficiency and service level of intersection single point control can be improved, and therefore the operation efficiency of an urban traffic system is greatly improved, and urban traffic jams are relieved.

The invention discloses a method for extracting cannabidiol from industrial hemp floral leaves. The method comprises the following steps: grinding and drying floral leaves of industrial hemp, thereby obtaining medicinal powder; extracting the medicinal powder by adopting 30-100v% of ethanol, thereby obtaining extracting solution; concentrating the extracting solution to obtain extract; performing water precipitation on the extract, removing the impurities, thereby obtaining water precipitation solution; centrifuging the water precipitation solution, adding 10-100v% of ethanol into the obtained precipitate, dissolving to obtain an alcoholic solution of the precipitate; performing column chromatography on the alcoholic solution of the precipitate; concentrating the eluent obtained by eluting after column chromatography, adding ethanol to perform supersaturation dissolving, thereby obtaining a crystal; adding the crystal into purified water or ethanol for washing, thereby obtaining a primary product; uniformly mixing the primary product by using the purified water, drying, thereby obtaining the cannabidiol. According to the method disclosed by the invention, the highly safe ethanol serves as a solvent, so that the purity of the cannabidiol in the finished product is improved, a psychotoxic component, namely tetrahydrocannabinol, is removed, the product safety is improved, and the method is suitable for industrial production.

A method and a device to grow from the vapor phase, a single crystal of either SiC, a group III-nitride, or alloys thereof, at a growth rate and for a period of time sufficient to produce a crystal of preferably several centimeters length. The diameter of the growing crystal may be controlled. To prevent the formation of undesirable polycrystalline deposits on surfaces in the downstream vicinity of the single crystal growth area, the local supersaturation of at least one component of the material grown is lowered by introducing a separate gas flow comprising at least one halogen element or a combination of said halogen and hydrogen species.

A method for preparing potassium nitrate and ammonium chloride employing double decomposition reaction comprises the following steps: dissolving ammonium nitrate and potassium chloride in water according to a defined ratio at 110 DEG C, continuously adding potassium chloride and water, heating while stirring to ensure that potassium nitrate is in supersaturation state, after stopping heating, cooling the solution in a vacuum cooling crystallizer to 36-40 DEG C to separate potassium nitrate crystal, placing the potassium nitrate crystal in a centrifugal machine with a filter cloth lining to obtain coarse potassium nitrate, then washing the potassium nitrate with cold water, drying to obtain the finished potassium nitrate; in addition, adding ammonium nitrate in mother solution I and cleaning solution to adjust solution concentration so that ammonium chloride can reach supersaturation state, using a vacuum concentration device to perform negative pressure evaporation, separating and precipitating ammonium chloride by centrifuging and obtaining a solid ammonium chloride product, wherein, when dissolving ammonium nitrate and potassium chloride, the ratio of ammonium ion to chlorine ion is 1:2 and when using the centrifugal machine to obtain the coarse potassium nitrate, the separated mother solution is another mother solution I sharing the same saturation point of potassium nitrate and ammonium chloride. The solution of feed liquid circular reaction overcomes the defects of the prior art that the price of potassium nitrate used in reaction is high, the resource of potassium nitrate is in short supply and the cost of devices used in ion-exchange method is high, thus being applicable to the production of potassium nitrate.

The present invention relates to a method of producing D-psicose crystals from a D-psicose solution by using supersaturation.

The invention provides a preparation device for preparing functional micro-nano materials on silicon surfaces based on femtosecond laser and a method. When the device is used for preparation, scanning speed reaches 4mm/s, and is increased by 20 times as compared with scanning speed when micro-nano materials are prepared in a traditional method. Simultaneously, supersaturation doping of the silicon material surface and preparation of micro-nano structures of the surfaces are realized during preparation, prepared micro-nano materials can absorb 90% of light with wavelength ranging from 200nm to 2500nm, and silicon materials without scanning traces on surfaces can be obtained. The preparation device and the method are exquisite in design and easy to control, and the prepared materials can be applied to solar cells, detectors, field emission devices and the like in the photoelectric industry.

The invention aims at providing an efficient preparation method for nanostructure oxide dispersion strengthening steel, which adopts an atomization method for direct preparation(for one step) of powder solid solution alloy containing supersaturation solid solution of Y and Ti, so that conventional process for long-time mechanical alloying ball-milling between mother alloy(free of Y and Ti) atomization powder process as well as atomized powder and Y2O3 and Ti is replaced, and necessary microstructure is provided for forming high density nanostructure rich Y-Ti-O precipitated phase in follow-up process. According to the method, the preparation process is simplified, and bad microstructures such as non-nanostructure precipitated phase and the like and degradation of material property caused by long-time ball milling in existing process can be controlled or prevented, the obdurability and radiation resistance and helium fragility resistance of the material can be improved, so that the operation requirement of key structure material of core parts on advanced nuclear reactor is satisfied.

The invention discloses a method for preparing MOF-5 and belongs to the technical field of preparation of metal framework materials. Zinc sources and terephthalic acid are dissolved in solvents separately. One solution is heated, and the other solution is added into the heated solution dropwise to prepare MOF-5 by a solvothermal method. The method not only utilizes existing devices, but also controls the degree of supersaturation of reaction solutions at a low level without consuming more solvents to prepare MOF-5 with good granule consistency, high specific surface area and good thermostability. The method reduces consumption of solvents, and has loose facility requests and simple operations, and MOF-5 can be prepared economically and effectively.

The invention relates to an open type intelligent monitoring comprehensive experiment platform in the sugarcane sugar boiling process. The open type intelligent monitoring comprehensive experiment platform consists of a hardware part and a software part, wherein the hardware part comprises a sugar boiling tank body module, an auxiliary work module, a sensor data collecting module and a valve control module, the software part comprises a real-time data collecting assembly, a supersaturation degree soft measuring assembly and a sugar boiling process dynamic parameter optimizing and control regulation assembly, and the hardware part and the software part are connected with each other through a Mod bus and a controller area network (CAN) bus. The platform is used for scientific research, various kinds of monitoring method optimizing research are developed under various actual work conditions in the sugar boiling process, and the practical monitoring technology is provided in the actual sugar boiling process. The experiment platform can also be used as a comprehensive experiment teaching platform for students specialized in measuring control and sugar making, and relative comprehensive and design research teaching method research is developed.

The invention provides a carbon dioxide capturing and seawater desalting co-production device and method based on a hydrate method, belonging to the technical field of hydrate application. The carbon dioxide capturing and seawater desalting co-production device comprises a gas-water conveying part, a hydrate generation and decomposition control part and a product storing and discharging part. The hydrate generation and decomposition control part comprises a front-grade structure and a rear-grade structure; a hydrate generation condition is gas supersaturation. A first-grade hydrate generates residual gas and decomposed water to be used as second-grade raw materials; after two grades of treatment, fresh water is obtained and stored; N2 is discharged to atmosphere by a gas exhausting safety valve; carbon dioxide is introduced into a gas tank to be stored. The carbon dioxide capturing and seawater desalting co-production device is applicable to the co-production of carbon dioxide capturing and seawater desalting of a fossil fuel power station in a coastal region, so as to meet the requirements of the carbon dioxide capturing of a smoke CO2/N2 power station; a heat exchanger is used for pre-cooling so that the cold loss is reduced and the energy utilization rate is improved; the reaction speed is increased by high-speed agitation in a hydrate generation process; emissions comprise the N2 and concentrated seawater and have no pollution to the environment.

The invention relates to a method and a device which adopt steam phase changing to cooperatively remove PM2.5 and gas pollutions from a high temperature and high humidity flue gas. The invention comprises a dust catcher, a flue gas humidity regulating chamber, a condensing heat exchanger and a washing absorption tower. The method is that the flue gas enters the flue gas humidity regulating chamber after coarse dust removing in the dust catcher, and atomized hot water is sprayed to regulate the humidity of the flue gas; after humidity regulation, the flue gas is induced into the condensing heat exchanger to reach supersaturation, and the supersaturation steam takes the PM2.5 as condensing core to generate phase changing, thus increasing the granularity of the PM2.5; then the steam enters the washing absorption tower, and in the tower, the flue gas reversely contact a middle-lower temperature alkalescent washing-adsorbing liquid to be further subject to the phase changing of the steam taking PM2.5 as condensing core, and the alkalescent washing-adsorbing is adopted for removing the growing dust-drop and gas pollutions. Taking the characteristics of the high temperature and high humidity flue gas into account, the invention adopts the steam phase changing theory to lead the PM2.5 to be condensed and to grow so as not only to cooperatively remove PM2.5 and gas pollution, but to recycle the gasifying potential heat released by steam condensing and the sensible heat caused by temperature reduction of the flue gas.

A crystal growth method of a group III nitride includes the steps of forming a melt mixture of an alkali metal and a group III element in a reaction vessel, and growing a crystal of a group III nitride formed of the group III element and nitrogen from the melt mixture in the reaction vessel, wherein the step of growing the crystal of the group III nitride is conducted while controlling an increase rate of degree of supersaturation of a group III nitride component in the melt mixture in a surface region of the melt mixture.

The invention discloses a method for preparing pneumocandin B0. The method comprises the following steps of: a) centrifuging the fermentation liquid of echinocandin B0, taking mycelium, leaching the echinocandin B0 in the mycelium with a first solvent and filtering and removing the mycelium; b) distilling the solvent in the first solvent leaching solution of echinocandin B0 to dryness, soaking with a second solvent and then filtering and removing the insoluble substances; c) distilling the second solvent soak solution of echinocandin B0 to dryness and then dissolving in the first solvent, andcollecting effluent liquid through overly acidic alumina column; d) distilling the collected solution of echinocandin B0 to dryness and then dissolving in the first solvent, utilizing adsorbent resin,performing eluting with the first solvent and then collecting the part with higher purity; e) distilling the collected solution of echinocandin B0 to dryness and then dissolving in the first solvent,utilizing inverse resin, performing eluting with the first solvent and collecting the part with higher purity; and f) distilling the collected solution of echinocandin B0 to dryness and then dissolving in the first solvent, adding in a small amount of water by dripping to achieve the purpose of separation by crystallization after supersaturation, and then preparing the echinocandin B0. The methodfor preparing the echinocandin B0 not only can well remove the pigment, but also leads the purity of the echinocandin B0 to be improved by more than 96 percent.

The invention provides a three-directional near-isotropy high-performance aluminum alloy cylindrical forge piece manufacturing process. The manufacturing process specifically comprises the following steps of raw material size design, cast ingot quality detection, heating before ingot casting, multi-directional forging, return to a furnace for heating, Z-direction upsetting and punching, return toa furnace for heating, core shaft drawing out, return to a furnace for heating, saddle forging, machining, heating before rolling, ring rolling, solution treatment, aging treatment and quality detection. According to the manufacturing process, an aluminum alloy cylindrical forge piece is subjected to nearly equal deformation in three directions, so that the three-direction performance of a productis nearly isotropic; a thick residual crystalline phase in cast-state structure is fully crushed so as to provide structure preparation for second phase uniform dispersion distribution in the heat treatment process; a second phase in the structure is fully dissolved, the degree of supersaturation is improved, the material potential is excavated to the maximum extent, and the performance limit ofa material is exerted; and the small reduction rate is adopted, the quenching water temperature is increased, the stress in the product manufacturing process is reduced, so that the residual stress ofthe forge piece is controlled within a certain range.

The invention relates to a production process and a crystallization device for large-particle ammonium sulfate. 30-50 percent unsaturated ammonium sulfate solution from an acid-cleaning unit enters a crystallizer and then is evaporated in vacuum at an operation temperature of between 40 and 70 DEG C so as to evaporate moisture and obtain ammonium sulfate crystals; during crystallization, ammonium sulfate mother solution is subjected to heat exchange in an outer circulation channel, and excessive fine crystals are eliminated; and the circulating mother solution entering the outer circulation channel is heated by use of part of low-pressure steam from the crystallizer, so that energy consumption is reduced by 20 to 40 percent. The crystallization device adopts an optimized flow-guiding crystallizer (DTB), and a blender perpendicularly stretches into a flow-guiding cylinder from the bottom of the crystallizer. Because the production process effectively controls the supersaturation degree of the ammonium sulfate mother solution inside the crystallizer, large-particle ammonium sulfate crystals can be obtained, and the quality of ammonium sulfate is improved. The crystallizer is not easy to form crystal scabs inside, has reasonable structure and high production capability, can ensure the production of the crystal products with narrow particle-size range, and can meet the requirements of users on different particle size of the crystal products.

The invention discloses a process for preparing carbon-coated phosphate cathode material of a lithium ion battery through utilizing supercritical fluid, which comprises placing to-be-coated phosphate anode active material in a high-pressure stirred tank reactor, pumping supercritical fluid which dissolves with polymer solution into the reactor through a high-pressure pump, fully stirring under the condition of preset temperature and pressure to fully moisten the polymer solution and anode active substances, then fast spraying the mixed paste of supercritical fluid and active substances in an expansion separating chamber through nozzles, thereby making polymer solutes reach highly super-saturation state in a shorter time and grow on the surface of coated substances to form an even coating layer, and then conducting with high-temperature treatment under the non-oxidizing atmosphere to split off organic polymer material to form an even carbon-coated layer on the surface of the phosphate anode material.

The invention provides a process for purifying water containing soluble species capable of forming one or more sparingly soluble salts or minerals, said process comprising feeding a pressurized water stream into a treatment zone having one or more membranes disposed therein, passing said stream along said membrane(s) to recover a permeate and to withdraw a concentrate therefrom while periodically reversing the direction of the flow of said stream in said treatment zone, wherein the periodicity of the flow reversal is such that said one or more membranes are exposed to supersaturation conditions evolving in said water stream for a period of time which is less then the time required for said supersaturated water stream to precipitate one or more of said sparingly soluble salts and/or minerals therefrom.

A method for removing ionic species from a desalination unit, comprises: (a) circulating a wash stream in a closed loop comprising a desalination unit and a precipitation unit, the wash stream flowing at a linear velocity of at least 5 cm/second through the desalination unit, the wash stream becoming more saline after passage through the desalination unit; and (b) removing a portion of calcium sulfate from the wash stream by precipitation in the precipitation unit to obtain a supersaturation degree of calcium sulfate in the wash stream entering the desalination unit in a range of from about 1.0 to about 3.0.

The invention discloses an image defogging method based on weak supervision generation antagonism network. The present invention mainly solves the problem of instability of defogging effect of the real foggy day image in the prior art. The implementation scheme is as follows: 1) obtaining a real training set and a composite training set; 2) respectively constructing a generation network and a confrontation network; 3) updating the parameters of the countermeasure network according to the loss function of the countermeasure network; 4) establishing a loss function of the generating network andupdating parameters of the generating network according to the loss function; 5) judging whether the update times of the generation network and the antagonism network reach 100, if so, inputting the real foggy day image into the generation network for defogging, otherwise, returning to step 3). The image after the method of the invention has rich details, improves the brightness, contrast and clarity of the image, reduces the phenomenon of supersaturation and distortion, and can be used in the field of computer vision.

The present invention relates to a crystallization method of abamectin B 1a. Said method includes the following steps: using crystallization solvent n-butanol to stir and dissolve primary crude powder of abamectin B 1a at 75-100deg.C to saturation, filtering while the saturated solution is hot to obtain clear hot-saturated solution; slowly cooling said solution to that when the supersaturation degree is 1-3, adding crystal seeds, constant stirring for 20-60min, its stirring speed is 120-300rpm, and cooling to make crystallization, fitering crystal slurry or centrifugally-separating said crystal slurry, washing crystal and drying so as to obtain the invented abamectin B 1a.

A process for the release of a biologically active species comprising the steps of:

• • providing a mesoporous oxide-based material having structural order and at least one level of porosity;
  • fixing or immobilizing said biologically active species in said ordered mesoporous oxide; and
  • providing said ordered mesoporous oxide with said fixed or immobilized biologically active species in vivo thereby realizing intraluminally induced substantially pH-independent supersaturation of said biologically active species resulting in enhanced transepithelial transport; wherein said biologically active species is a poorly soluble therapeutic drug classified as belonging to Class II or Class IV of the Biopharmaceutical Classification System and said ordered mesoporous oxide has a pore size in the range of 4 to 14 nm.

The invention belongs to the field of aluminum alloy heat treatments, and particularly relates to a heat treatment process for a scandium-containing Al-Zn-Mg-Cu base squeeze casting aluminum alloy. The heat treatment process adopts a three-stage strengthening solid-solution treatment process and a single-stage aging treatment process, wherein the three-stage strengthening solid-solution treatment comprises: carrying out thermal insulation for 24 h at a temperature of 460 DEG C, heating to a temperature of 470 DEG C, carrying out thermal insulation for 8 h, continuously heating to a temperature of 480 DEG C, carrying out thermal insulation for 2 h at a temperature of 480 DEG C, immediately taking, and carrying out water quenching, and then the single-stage aging heat treatment is performed and comprises: carrying out thermal insulation for 24 h at a temperature of 120 DEG C. According to the present invention, the coarse non-equilibrium phase in the alloy can be sufficiently dissolved and homogenized, the supersaturation degree of the solid solution is increased, the stress concentration tendency with the grain boundary eutectic phase is reduced, the matrix structure after aging is fine GP zones distributed in a diffusion manner and an eta<,> phase, the grain boundary is a grain boundary precipitation phase distributed in a discontinuous manner, the ultra high strength ([sigma]s is more than or equal to 500 MPa) is achieved, and the good plasticity (delta is more than or equal to 10%) is provided.

A method for growing a graphene nanoribbon on an insulating substrate having a cleavage plane with atomic level flatness is provided, and belongs to the field of low-dimensional materials and new materials. The method includes the following steps. Step 1: Cleave an insulating substrate to obtain a cleavage plane with atomic level flatness, and prepare a single atomic layer step. Step 2: Directly grow a graphene nanoribbon on the insulating substrate having regular single atomic steps. In the method, a characteristic that nucleation energy of graphene on the atomic step is different from that on the flat cleavage plane is used, and conditions, such as the temperature, intensity of pressure and supersaturation degree of activated carbon atoms, are adjusted, so that the graphene grows only along a step edge into a graphene nanoribbon of an adjustable size. The method is mainly applied to the field of new-type graphene optoelectronic devices.

A method for producing a compound single crystal involving reacting a gaseous raw material and a liquid raw material, wherein the compound single crystal is grown with agitation of the liquid raw material in such a manner that a flow is formed in the liquid raw material, from the gas-liquid interface, at which the gas and the liquid contact with each other, to the inside of the liquid raw material; and an apparatus for use in the method. The above agitation allows the easy dissolution of the gaseous raw material into the liquid raw material and the achievement of a supersaturation state in a short time, resulting in the improvement in the grow rate of the compound single crystal, and further allows more uniform dissolution of the gaseous raw material through the formation of the flow from the gas-liquid interface having a high content of the gaseous raw material to the inside of the liquid raw material having a low content of the gaseous raw material, resulting in the inhibition of non-uniform generation of nuclei in the gas-liquid interface, which in turn leads to the improvement in quality of the resultant compound single crystal.

The invention relates to a distinguishing method, in particular to a method for distinguishing the supersaturation state of signal intersections, and aims at solving the problem that in the current distinguishing method, whether the intersection is in the supersaturation state or not is mainly distinguished according to the queuing length, and the queuing length dynamically changes under the influence of signal lamps, so that accurate measurement is difficult; as a result, the distinguishing precision is low. The method comprises the following steps: arranging a video detector at the stop line of each entrance of the signal intersection, and continuously arranging two induction coils at the position 30 m away from the down stream of the exit of the signal intersection; collecting traffic flow data through the video detectors and induction coil detectors arranged at intersections and road segments; transmitting the data collected by the detectors and signal timing plans stored by signal intersection annunciators to a transport management center through communication lines; distinguishing the state of the intersections. The method is used in the field of transportation.

The invention relates to a process for preparing microcrystalline medicine, especially preparation process of ibuprofen microcrystalline product. Solving the crude ibuprofen in solvent, such as alcohol solution, petroleum ether, hexane and so on, to produce solution with higher temperature; then putting the ibuprofen into the solvent with lower temperature for separating the small ibuprofen crystal by increasing the supersaturation degree of ibuprofen; finally, filtering drying and producing the buprofen microcrystalline product. The mixed solution of said higher temperature solution and lower temperature solvent can be resolved at some temperature after separation by crystallization, crystallized by decreasing temperature, filtered, and dried to produce ibuprofen microcrystalline product with different granularity and narrow particle size distribution.