30 results about "Diffusion loss" patented technology

The invention relates to a method for measuring the particle spectrum of atmospheric nano-particles, which comprises the following steps of: adopting an ion migration tube; performing sample introduction on the atmosphere through micropores; forming divergent small ion beams in a drift region of the ion migration tube; and simultaneously, applying negative pressure to the drift region to realize the aim of measuring the particle spectrum of the atmospheric nano-particles in real time, wherein the pressure is 0.1 to 0.5 time of the atmospheric pressure. The method adopts an ion migration spectrum, and shortens the length of the migration tube, improves the migration field strength and reduces the diffusion loss of charged ions by designing a flow divider for micro sample introduction, so the method realizes the real-time measurement of the particle spectrum of the atmospheric nano-particles.

The invention discloses a pulse backflush deashing device for a filter. Filtering units are arranged on a pipe plate of the filter, and the pipe plate divides the filter into a clean gas cavity and a dusty gas cavity in a sealing manner. The pulse backflush deashing device comprises ejectors arranged at the upper parts of the filtering units, and backflush pipelines matched with the ejectors, wherein one end of each backflush pipeline is communicated with a backflush gas storage tank through a pulse backflush valve, and a direction-adjusting multi-hole jet nozzle according to the top part of each ejector is arranged at the other end of each backflush pipeline. As the pulse backflush deashing device adopts the direction-adjusting multi-hole jet nozzles with the jet directions being adjustable, the jet direction of backflush gas can be adjusted, the jet length can be extended, and a primary jet flow and a secondary jet flow are mixed uniformly by multiple high speed jet flows, so that the distribution statuses of backflush gas flows entering the ejectors can be improved, the diffusion loss is reduced, the energy transmission efficiency can be improved, and the deficiencies, such as non-uniformity of pulse backflush, as well as gas flow eccentricity and filter pipe vibration that are brought by the existing jet nozzles, are overcome.

The invention discloses an aircraft engine noise simulation synthesis audible method, system and device, and belongs to the technical field of aircrafts, and the method comprises the steps: 1, readingan input file; 2, preprocessing the input file; 3, calculating the total sound pressure level of each 1/3 frequency band of the broadband noise; 4, carrying out short-time fast Fourier transform on the empirical data, analyzing and deriving low-frequency oscillation, and modulating the amplitude of the 1/3 frequency band sound pressure level by using the low-frequency oscillation; 5, synthesizingbroadband noise of the aircraft through a subtraction synthesis method; 6, calculating the frequency and the amplitude of each single tone and harmonic waves thereof; 7, independently modulating theamplitude and frequency of each single tone by using low-frequency oscillation; 8, performing single-tone noise synthesis; 9, superposing the broadband signal and the single-tone noise signal of the aircraft; and 10, adding direction-related gain and absolute time delay as well as time delay and gain corresponding to diffusion loss and atmospheric absorption to the aircraft noise signal generatedin the synthesis stage.

The invention discloses a method for preparing a single-component waterborne epoxy modified emulsified asphalt. The method comprises the following steps: a, mixing a waterborne epoxy resin with an emulsified asphalt to prepare an emulsified asphalt A; b, uniformly mixing a curing agent with hot asphalt, performing emulsification to obtain an emulsified asphalt B containing the curing agent in asphalt particles; and c, uniformly mixing the emulsified asphalt A with the emulsified asphalt B to obtain the single-component waterborne epoxy modified emulsified asphalt. The curing agent hides in theasphalt latex particles, so the curing reaction of the epoxy resin in an emission during the storage period is avoided, and the storage stability is improved; the application convenience is benefited, the construction process can be easily monitored, and the quality stability is improved; and the oil-based curing agent has no diffusion loss in water, so the epoxy resin is cured completely after the film formation of the emulsion, the performances after the formed film is cured are improved, the loss of the curing agent is reduced, and the curing efficiency is improved. The prepared asphalt emulsion is suitable for various civil engineering construction and waterproof and anticorrosive protection projects as a structural material and a functional material.

The invention relates to preparation of a high-performance ZnS @ SiO2/C composite cathode material and a lithium/sodium storage application of the material. For the problem of poor cycle performance of sulfide (such as ZnS) due to volume expansion and dissolution/diffusion loss during lithium/sodium storage, a core-shell ZnS @ SiO2/C nanocomposite is realized through simple liquid phase reaction and vapor deposition by using zinc salt, ethanol, waste glass and other raw materials. Compared with ZnS cathode, the main advantages of the composite cathode material are that: the outer layer of SiO2/C has stable structure and strong strain resistance, low quality proportion, thin thickness and low ion/electron transmission impedance; the preparation raw materials are cheap and easily-available,and the production process is simple; ZnS @ SiO2/C shows excellent electrochemical performance when the ZnS @ SiO2/C is used as the lithium/sodium ion battery cathode. The preparation method of the material is novel, effective and ingenious, can fully realize the recycle of glass resources, and provides an effective basis for the development of the high-performance sulfide cathode.

The invention discloses an exosome drug carrying system and applications thereof in spinal cord injury repairing. The system includes an exosome and drug molecules encapsulated in the exosome; the drug molecules include paclitaxel and enter the drug carrying exosome through an extruding mode; and the exosome is derived from mesenchymal stem cells. An exosome drug carrier can encapsulate a small molecule chemical drug into the exosome, so that the diffusion loss of drugs and caused toxic and side effects can be reduced; and during the application of the spinal cord injuries of rats, the differentiation of endogenous neural stem cells to neurons can be induced, and the recovery of the behavior functions of the rats can be promoted.

The invention discloses a recovery and utilization method of separated substances of coke-oven gas and belongs to the technical field of energy conservation and environmental protection of the cokingindustry. The recovery and utilization method is characterized in that a coke-side coke-oven gas recovery system is arranged at the coke side of a coke-oven carbonization chamber to recover raw coke-oven gas produced from the coke-oven carbonization chamber at the initial coking period and the final coking period, the raw coke-oven gas is conveyed into a coke-oven combustion chamber as fuel for heating of a coke oven; at the middle period of coking, the raw coke-oven gas produced in the the coke-oven carbonization chamber is recovered by a machine-side coke-oven gas recovery system at the machine side of the coke-oven carbonization chamber; meanwhile, at the middle period of coking, if the machine-side coke-oven gas recovery system fails or the pressure in the coke-oven carbonization chamber exceeds the coking operation capability, the raw coke-oven gas produced in the coke-oven carbonization chamber is recovered by adopting the coke-side coke-oven gas recovery system and is conveyed into the coke-oven combustion chamber. The recovery and utilization method of the separated substances of the coke-oven gas disclosed by the invention has the beneficial effect that the problem that when sudden accidents occur on the raw coke-oven gas recovery system, the diffusion loss of the raw coke-oven gas is serious and the environment is polluted is solved.

The invention discloses a method for synthesizing magnesium germanide. Germanium powder and magnesium powder are uniformly mixed according to the mass ratio of 1 to 2, and filled into a reactor, and the reactor is sealed and pushed into a furnace tube. The furnace tube is vacuumized by a mechanical pump and transferred into a heating furnace, and then temperature rise begins. When the temperature reaches between 500 and 600 DEG C required for synthesis, heat insulation is performed for 1 to 3 hours so as to make the reaction fully performed; and the reactor is naturally cooled and then taken out, and bluish grey magnesium germanide powder is obtained. The magnesium germanide is generated by the germanium powder and the magnesium powder in the sealed reactor, thereby the problem of ratio deviation caused by diffusion losses of magnesium steam is avoided. The conversion ratio is obviously higher than that of a general method; the content of impurities is low; and the purity of products is high. Moreover, the purity of the magnesium germanide has great significance on guaranteeing the purity of germane prepared by taking the magnesium germanide as a raw material. Simultaneously, the method overcomes the defect of large power consumption when the electric furnace is used for heating and fusing germanium and magnesium to prepare the magnesium germanide, and reduces the energy consumption.

The invention belongs to the technical field of preparation of a battery electrode material, specifically relates to a poly-sulfur-tin powder stable lithium-sulfur battery sulfur electrode material and a preparation method thereof. According to the poly-sulfur-tin powder stable lithium-sulfur battery sulfur electrode material, elementary sulfur, an ionic liquid and polyaniline nanometer powder areprocessed and sprayed, dried and condensed to obtain spherical composite sulfur powder; and next, poly sulfur and tin powder are grinded and dispersed to be sprayed and coated on the surface of spherical composite sulfur powder to obtain the poly-sulfur-tin powder stable sulfur electrode material. Through thermal ionic liquid and polyaniline nanometer powder doping and fixing, the sulfur electrode material remains relatively excellent conductivity; through further coating of poly sulfur and tin powder, excellent conductivity is achieved, and sulfur volume expansion and crack can be preventedeffectively by virtue of elasticity of the poly sulfur, thereby preventing diffusion loss to a body electrolyte; and excellent affinity with elementary sulfur is achieved, so that more elementary sulfur can be accommodated and loaded, thereby ensuring high discharge capacity and improving battery cycle stability.

The invention discloses a motor front-mounted type submersible tubular pump. The motor front-mounted type submersible tubular pump comprises a diffusing tube, a guide blade body, an impeller housing,an impeller component, a water charging horn-shaped tube, a flexible sealing part, a sealed short tube, a planetary reducer, a submersible motor, a wire discharging device, a water charging tube and aflow guide cap. The submersible tubular pump disclosed by the invention effectively reduces diffusion loss caused by a large diffusion angle of the guide blade body so that the efficiency of the submersible tubular pump is improved, the efficiency of a pump section of the submersible tubular pump is the same as the efficiency of a traditional tubular pump; meanwhile the planetary reducer is adopted; the submersible motor is designed as a high-speed motor so that the size of the submersible motor is greatly reduced; and thus the diameter, the size and the weight of the submersible tubular pumpare reduced, so the friction loss of the water charging tube is reduced and the efficiency of the submersible tubular pump is improved.

The invention discloses a finned u-shaped solar collector tube, which mainly comprises a u-shaped copper tube, a sail-shaped fin, a single-sealing cover, a transparent heat preservation tube, a reflective diaphragm and the like. Due to the adoption of a vacuum sealing heat preservation measure combining the single-sealing cover and the single-layer transparent heat preservation tube, the finned u-shaped solar collector tube realizes the heat collection scheme of directly taking the fin of the u-shaped copper tube as a solar irradiation surface, changes heat collection and heat transfer ways adopted in the prior art, cancels redundant low-efficiency intermediate heat transfer links, simplifies a structure, directly transfers radiation energy collected by the fin into a heat transfer medium in the u-shaped copper tube, remarkably reduces the surface temperature of the irradiation surface, improves a heat transfer rate and heat efficiency, enables a plurality of technical measures such as the sail-shaped fin, a heat absorption channel, reflective heat-aggregation, a matt black body and the like capable of increasing an effective heat collection area and improving the heat collection efficiency to be applied to achieve the technical effects of radiant absorptance alpha of 96 percent, the heat efficiency improved by about 40 percent and reduction in the cost, has the characteristics of rational structural design, reduction in the cost, improved heat efficiency and the like, and the advantages of low heat diffusion loss, high heat transfer rate, reliability, simple process and the like, and is convenient to arrange and easy to produce in large scale.

The invention discloses a sulfur and selenium compound coated with conducting polymer and graphene oxide and preparation and application thereof. A sulfur and selenium compound is generated based on the sodium selenite and sodium sulphide reaction, the sulfur and selenium compound is coated with a layer of conducting polymer to improve the conductivity and then is coated with a layer of graphene oxide to obtain composite materials of selenium sulfide/conductive polymer/graphene oxide. The conducting polymer is introduced in the selenium sulfide positive electrode materials to obviously improvethe conductivity of the selenium sulfide and relieve the shuttle effect caused by diffusion loss of polysulfide and polyselenide. Besides, the graphene oxide of the coating layer can more efficientlyimprove the specific capacity of the selenium sulfide battery.

The invention discloses a solar transparent heat insulation pipe, which mainly comprises a heat conducting pipe, wind surf fins, a rubber sealing ring, a suction and exhaust pipe, a sealing cover, a transparent heat insulation pipe and a reflective diaphragm. Through vacuum heat insulation of a single-layer transparent heat insulation pipe, the heat conducting pipe and the fins are directly used for collecting heat of a radiated surface, a heat collection and heat transfer mode that solar radiation energy is collected by a metal heat absorbing coating on a vacuum glass collector pipe in the conventional technical route is changed, a status that various heat conducting pipes are only taken as intermediate heat transfer tools is changed, the intermediate low-effect and redundant heat transfer links are eliminated, and the structure is simplified, so respective heat transfer advantages of various heat conducting pipes can be fully exerted, and various techniques capable of obviously improving heat collecting energy efficiency, such as the wind surf fins, a heat absorbing channels, reflective heat gathering and suboptical blackbody are applied; therefore, the energy efficiency of collecting the solar radiation energy can be greatly improved, and the solar transparent heat insulation pipe has the characteristics of reasonable structural design, simple process, low cost, high reliability, high heat collecting efficiency, small diffusion loss of heat radiation, convenience of installation and use, and suitability for U tube and heat pipe type solar water heaters.

The invention provides a corrugated paper humidifying water tank which comprises a humidifying water tank, wherein the humidifying water tank is arranged below an output end of corrugated paper; a humidifying water pipe is arranged in the humidifying water tank; a spherical sprayer is arranged on the humidifying water pipe; the distance from the upper end surface of the humidifying water tank to the corrugated paper is 1-2cm; the distance from the humidifying water pipe to the side wall of the humidifying water tank is 8-10cm; a recovery hole is formed at the bottom of the humidifying water tank on the side where the humidifying water pipe does not pass through; a recovery water pipe is arranged below the recovery hole. The corrugated paper humidifying water tank provided by the invention has the beneficial effects that by humidifying the corrugated paper through the humidifying water tank, the increase of air humidity of a workshop caused by the diffusion loss of the humidifying moisture resulting from air flow is prevented, and non-uniform dehumidifying caused by the direction deviation of the humidifying moisture resulting from air flow is avoided; the recovery hole and the recovery water pipe collect residual water in the humidifying water tank. The corrugated paper humidifying water tank provided by the invention is simple in structure and realizes a good using effect.

The invention relates to a hydrogel system for anchoring a nano drug carrier and use thereof in preparing a drug delivery system, which belongs to the field of biotechnology, and relates to stem celltransplantation and sustained release of a local immunosuppressant, in particular to a nano drug delivery system for reducing immune rejection during a stem cell transplantation process. The drug delivery system achieves the local sustained release of immunosuppressive drugs by anchoring the nano drug carrier inside the hydrogel, reduces local immune rejection, and improves the survival of stem cells in the hydrogel, and improves the effect of stem cell transplantation for treating diseases. The system provides an intervention strategy for stem cell transplantation for clinical practice, the strategy comprises anchoring the nano drug carrier on the hydrogel, increasing the local retention time of the nano drug in stem cell transplantation, and reducing the local diffusion loss of the nanodrugs, which improves the local long-term sustained release of immunosuppressants.

The invention relates to the field of soda ash production, in particular to a production process of low-ammonia wet sodium bicarbonate. The production process includes the steps of increasing the amount of causticizing liquid required for brine refining, increasing the concentrations of OH<-> and CO3<2-> in refined brine, ensuring that the turbidity index of the refined brine is lower than or equal to 25 ppm, and controlling the total chlorine concentration of the refined brine to be not more than 5.35 mol/L to obtain low-calcium-magnesium refined brine; feeding the refined brine as an ammoniapurification medium into a tail gas ammonia purification tower to purify outlet gases of an alkali filter through ammonia absorption, discharging outlet liquid to a furnace gas scrubbing tower of a light ash process, purifying furnace gases through ammonia absorption, and feeding the low-ammonia brine to a low-ammonia brine bucket; with low-ammonia cold light waste liquid or desalted water whichhave the ammonia concentration lower than 0.05mol/L as the alkali filter wash water, preparing the wet sodium bicarbonate with the low content of volatile ammonia components through a sodium bicarbonate filtration process, and delivering the wet sodium bicarbonate to a downstream process. The wet sodium bicarbonate provided by the invention has low content of the volatile ammonia components, thereby ensuring the salt index of end products and reducing the ammonia and chloride diffusion loss in wet sodium bicarbonate filtration and downstream process production.

The invention relates to a white LED (Light-Emitting Diode) light source of a transparent ceramic fluorescent tube packaged with blue chips on an inner wall thereof. The white LED light source is composed of the transparent ceramic fluorescent tube (1), a high transmittance packaging shell (2), an electrode (3), a cooling fin (4) and blue light-emitting bars (5), wherein the blue light-emitting bars (5) are adhered to the inner wall of the transparent ceramic fluorescent tube (1); the transparent ceramic fluorescent tube (1) is located right on the cooling fin (4) and placed in the high transmittance packaging shell (2); the high transmittance packaging shell (2) is inverselybuckled on the upper end face of the cooling fin (4); the electrode (3) is located under the cooling fin (4); one end of the electrode (3) is connected with the cooling fin (4) via a connection line and the other end of the electrode (3) is connection with an external power source. As the inner wall adhesion technology is adopted, the white LED light source is efficient and concise, the light emission is uniform; as the transparent ceramic fluorescent tube per se has excellent heat-conducting property and a big cavity volume is reserved between the transparent ceramic fluorescent tube and the high transmittance packaging shell, the heat dissipation effect is greatly improved. Since the remote excitation technology is adopted, the light emission is more uniform, the light diffusion loss is reduced and the light-emitting efficiency is improved.