59results about How to "Realize large-scale application" patented technology

The invention discloses a parallel structure and a control method for a photovoltaic power generation grid-connected inverter and belongs to the technical field of renewable energy sources. A topological circuit structure of the photovoltaic power generation grid-connected inverter is divided into a parallel structure of single-phase voltage type pulse-width modulation (PWM) inverters and a parallel structure of three-phase voltage type PWM inverters; and in the control method, an outer ring regulator of a control circuit of the parallel voltage type PWM inverters is independent based on a power grid voltage-oriented vector control technology in a control mode of voltage outer ring and current inner ring so as to form a common unified outer ring regulator; control strategies of various inverters are simplified into single closed loop current control so as to achieve the consistency of energy flow directions of the parallel voltage type PWM inverters and avoid ring current; and the parallel current sharing of the voltage type PWM inverters is realized. Therefore, multiple modules of the voltage type PWM inverters are connected in parallel to realize high-power modularized large-scale application.

The invention relates to an anode active material and a preparation method and application thereof. The anode active material includes: silicon oxide particles; and elemental silicon nanoparticles dispersed in the silicon oxide particles, wherein the median particle size of the monatomic silicon nanoparticles is 0.2-20 nm; the silicon oxide particles comprise lithium, the lithium in the silicon oxide particles comprises a lithium silicate compound, and the lithium silicate compound comprises one or more of Li2Si2O5, Li6Si2O7, Li2SiO3, Li8SiO6 and Li4SiO4. The anode active material disclosed bythe invention has the advantages of high capacity and coulombic efficiency, good multiplying power and cycle performance, the low expansion rate and the like when being used in a secondary battery. The preparation method is good in repeatability and high in safety. The secondary battery provided by the invention has the characteristics of high volume energy density, good rate capability, good cycling stability, low expansion rate and the like.

The invention discloses a universal autonomous navigation control method and device and a device terminal. The method comprises the steps of building an operating environment profile map according toan object position and distance information obtained by a laser sensor; obtaining flatness information of an operating environment road surface according to operating attitude information obtained byan inertial sensor and carrying out angle correction on the operating environment profile map on the basis of the flatness information; correcting the shape and size of an object in the operating environment profile map according to object image information obtained by a vision sensor and generating a real-time environment live map; and carrying out feature matching on the real-time environment live map and a pre-stored environment map, generating own positioning information after matching successfully, and carrying out navigation control on the basis of a path instruction generated by the positioning information according to an upper computer. The universal autonomous navigation control method and device can be applied to different working scenes and software upgrading and updating are not needed, so that the problem that a traditional navigation method cannot meet switching applications of multiple working scenes is solved.

The invention relates to a deep-dewatering conditioning agent suitable for high-grade anaerobic digested sludge and application thereof. The conditioning agent is prepared from a composite flocculantand a surface active agent, wherein in solid content of the sludge, the adding amount of the composite flocculant is 2% to 4.5%, and the adding amount of the surface active agent is 1.5% to 3%; the composite flocculant is inorganic/organic composite flocuulant, and the surface active agent is sodium dodecyl sulfate and/or lauryl sodium sulfate. A synergistic effect between the composite flocculantand the surface active agent is utilized to effectively improve sludge dewatering performance, and the situation that a water content of mud cake is reduced to 60% or less is effectively achieved after the sludge is dewatered.

The invention provides a method for preparing an HfS2/h-BN heterojunction material by selective patterning. The method comprises the following steps of 1, transferring an h-BN crystal domain or a thinfilm material to a target substrate; 2, performing target patterning photoetching on h-BN transferred onto the target substrate; 3, annealing the h-BN substrate under an oxygen atmosphere to remove an organic matter resided on a surface of the h-BN; and 4, growing an HfS2 atomic crystal on a surface of the h-BN substrate after annealing is completed, and selectively preparing the HfS2/h-BN heterojunction material. The HfS2/h-BN heterojunction material is simple in preparation process, low in cost and high in controllability, and importance significance is brought to mass integrated productionand application of an HfS2/h-BN material-based photoelectric device.

The invention provides a diapause inducing method for chrysopa formosa brauer. The method includes the following steps of 1, selecting the whole larval phase of chrysopa formosa brauer as the diapauseregulation and control timing, and adopting chrysopa formosa brauer at the regulation and control timing as diapause inducing objects; 2, placing chrysopa formosa brauer selected in the step 1 underan inducing environmental condition, and regulating and controlling the combination of illumination time length, temperature and total inducing time length every day to enable chrysopa formosa brauerto enter a diapause state, wherein the everyday illumination time length adopts a photoperiod of (8-12) L:(16-12) D, the temperature is 18-26 DEG C, and a continuous inducing time period starts from an annual-larva period to a pupal period. The method has the advantages that manual regulation and control of the growth process of chrysopa formosa brauer can be achieved, the diapause characteristiccan be applied to biological prevention and control to prolong the shelf life of natural enemy products, ensure safe long-distance transportation of the products and improve the disaster control effect, and a technical guarantee is provided for annual propagation expansion and large-scale application of the natural enemy insect products.

The invention discloses graphene oxide slurry, a miniature graphene electrode and a preparation method thereof and a miniature graphene supercapacitor. The graphene oxide slurry comprises the following components in parts by weight: 15-35 parts of graphene oxide, 1-3 parts of bonding resin and 150-200 parts of a solvent. The miniature graphene electrode is prepared from the graphene oxide slurry through the steps of printing and reduction. The miniature graphene supercapacitor comprises the miniature graphene electrode and an electrolyte, wherein the electrolyte covers a positive electrode and a negative electrode of the miniature graphene electrode. The preparation route from the graphene oxide electrode to the graphene electrode and then to the miniature graphene supercapacitor is simple and low in cost. The prepared miniature graphene supercapacitor with a two-dimensional planar structure is good in capacitance performance and convenient for being integrated into a chip electronic product.

The invention discloses a method for activating lignite. The method comprises the following steps: mixing lignite powder, a photocatalytic oxidizing agent and water uniformly; and completely stirringunder the condition of ultraviolet irradiation, adding the oxidizing agent in batches, and reacting at 30 to 60 DEG C for 0.15 to 24 hours to obtain activated lignite, wherein the photocatalytic oxidizing agent is titanium dioxide. By the method provided by the invention, the water-soluble organic humus content and the active group content of the lignite can be increased very obviously and large-scale application of the lignite is further realized; and the method provided by the invention is environment-friendly, pollution-free, short in process route, low in cost, simple in requirement on equipment and mild in condition, and can be applied to industrialized mass production.

The invention relates to a negative electrode active material for a battery. The negative electrode active material comprises the negative electrode active material particles, and the negative electrode active material particles contain a silica compound and comprise a lithium element, the doped metal M1 and the doped metal M2, wherein the metal M1 comprises one or more of titanium, magnesium, zirconium, zinc, aluminum, yttrium and calcium, the metal M1 comprises one or more of copper, nickel, iron, manganese, cobalt and chromium, the metal M2 comprises one or more of copper, nickel, iron, manganese, cobalt and chromium, and the metal M1 and the metal M2 account for 0.01-25 wt%, preferably 0.05-15 wt%, more preferably 0.1-10 wt% and more preferably 0.1-5 wt% of the content of the negativeelectrode active material. The battery prepared from the negative electrode active material has the advantages of high capacity, high coulombic efficiency, long cycle life and high water resistance.

The invention belongs to the technical field of agricultural mulching film preparation, and provides light-transmitting thin non-woven degradable agricultural mulching film and a preparation method. The method comprises the steps that firstly, hemp fibers are cut into long fibers, and colloidal materials, starch, dust and the like are scattered, sieved and removed; a mixed solution of sodium hydroxide and sodium sulfite is adopted for soaking treatment, paper slurry is obtained by means of a blasting method, and thin-layer non-woven fabric with large holes is prepared through the processes ofslurry grinding, beating and papermaking; the large holes are painted with thermoplastic starch, and the light-transmitting thin non-woven degradable agricultural mulching film can be prepared after hot-pressing and plasticizing molding. Compared with traditional methods, the method overcomes the defect of low transmittance of hemp fiber mulching film and the technical bottleneck that low thickness and high strength cannot be achieved at the same time.

The invention discloses an ultra-energy-saving electric radiator. The ultra-energy-saving electric radiator consists of a radiator body, a heat accumulation box and an electric heating element. In a 25 m<2> three-step energy-saving building room which accords with requirement of the ministry of housing and urban-rural development, temperature required by the China winter heating design specification can be reached with an input power of 220W; and heating efficiency is 454.5%.

The invention discloses a method for recovering protein in fish extract by using carrageenan as a flocculating agent. The method comprises the steps of adjusting a pH value of the fish extract to 3.0-8.0; adding a carrageenan solution with a mass concentration of 1-5% into the fish extract with the pH value adjusted; subjecting the carrageenan and protein in the fish extract to a flocculating reaction thoroughly; standing and layering to precipitate the protein; and separating solid from liquid to obtain the protein. According to the method, no harmful ingredient to human body is introduced; a process is simple; operation cost is low; operation time is short; possibility of the fish protein deterioration is reduced; and the protein in the fish extract is effectively recovered. The method has economic benefits and environment benefits.

The invention relates to the technical field of agricultural machinery, and especially relates to a drilling and sand filling device. The device is composed of a box body, a drilling mechanism, a sand filling mechanism, and a cam pushing mechanism. The box body is composed of a gear box, a power gear and a guiding plate. The guiding plate is fixedly connected to the lower end of the gear box. A horizontal guiding slot is connected to the guiding plate. The power gear is arranged in the gear box. The drilling mechanism comprises a drilling gear, a crank, a connection rod, a needle sleeve and a drilling needle. The sand filling mechanism comprises a sand filling gear, a connection rod, a pipe sleeve, a sand discharge pipe, and a sand guiding device. The cam pushing mechanism comprises a cam gear, a cam, a roller, and a cam driven rod. According to the invention, the drilling mechanism and the filling mechanism are orderly combined, such that sequential drilling-sand filling action steps are performed at a same position. Accordingly, the working efficiency is improved; the improvement agent large-scale application is realized; and the precise filling is achieved. The device facilitates the development and popularization of soil improvement technologies.

The invention belongs to the technical field of new material preparation, and particularly relates to a device for preparing oxygen vacancies of catalytic materials. The device comprises a reaction cavity, a vacuum pump, an inert gas tank, a reducing gas tank and a gas premixing chamber, and the vacuum pump, the reaction cavity, the inert gas tank and the reducing gas tank are communicated with the gas premixing chamber through valves. By adjusting the valve, the vacuum pump vacuumizes the reaction cavity, the reaction cavity is cleaned through inert gas, and reducing gas is introduced into the reaction cavity, so that oxygen vacancy manufacturing is achieved. According to the invention, vacuum heat treatment and controllable preparation of oxygen vacancies are integrated together, so that the material treatment time and steps are greatly shortened, and nano photocatalysts with different crystal structures and rich oxygen vacancies can be prepared.

The invention relates to a flat-plate photobioreactor device system. The flat-plate photobioreactor device system comprises a photobioreactor body, an aeration system, an algae liquid circulation system and a spray system, wherein the photobioreactor body comprises a reactor shell, a spray area and reaction areas; n stages of reaction areas are available, n is greater than 1, the n stages of reaction areas are partitioned by inner partition boards, and space is reserved between the inner partition boards and the bottom of the reactor shell, so that algae liquid can enter each reaction area from the spray area; flow guide plates are arranged in the reaction areas along the flowing direction of the algae liquid, and are positioned in the central positions of the reaction areas; space is reserved between the flow guide plates of the n stages of reaction areas and the top of the reactor shell. The flat-plate photobioreactor device system has the beneficial effects that the large-scale application of the microalgae carbon fixation technology can be realized, the problems that the traditional stirring mixing method is poor in mixing effect, and the shear force generated by stirring can severely damage the cellular structure of the microalgae are solved, the sufficient mixing of CO2 and the algae liquid in the photobioreactor is guaranteed, and the CO2 mass transfer rate is improved.