61results about How to "Solve the problem of high cost" patented technology

The invention discloses a low-cost and high-strength wear resistant cast steel utilizing silicon and manganese as main alloy elements and capable of being used for manufacturing such wear resistant components as a ball mill lining plate and an excavator bucket tooth, and the like. The chemical ingredients of the cast steel and the mass percents thereof are as follows: 0.2-0.6% of C, 0.5-1.5% of Si, 0.5-1.5% of Mn, 0.5-1.5% of Cr, smaller than 0.20% of Ti, smaller than 0.20% of RE, smaller than 0.015% of B, smaller than 0.15% of Ca and smaller than 0.015% of Al; the cast steel is firstly quenched at 950+/-10 DEG C and is annealed at 200+/-10 DEG C, the tensile strength thereof is larger than 1550 MPa, the impact toughness is larger than 90 J/cm2, the fracture toughness is larger than 80 Mpa.m1/2, and the hardness thereof is larger than 52 HRC.

The invention discloses an elliptic curve-based efficient and anonymous certificateless multi-receiver signcryption method. The method is used for solving the technical problem in the prior art that an existing certificateless multi-receiver signcryption method is low in operation efficiency. According to the technical scheme of the invention, firstly, a user public key and a partial private key, generated by a private key generation center PKG, are sent to a user. Secondly, after the user receives the user public key and the partial private key, the user calculates its own private key. Meanwhile, the user verifies whether the received user public key and the received partial private key are valid or not. If valid, the operation is continued. Otherwise, the operation is stopped. Thirdly, the signcryption algorithm is adopted to design an elliptic curve and the ciphertext information does not include the identity information of a sender and a recipient. Finally, the ciphertext information is broadcasted. Only authorized recipients can fairly decrypt and verify the ciphertext information. According to the technical scheme of the invention, the signcryption process is designed to conduct based on the elliptic curve. Therefore, the multiplication operation on the elliptic curve is reduced, and the calculation efficiency is improved.

The invention discloses a method for preparing feed yeast. The method comprises the following steps of: using waste solution obtained after phytin is extracted from water in which corn is soaked as a yeast culture substrate, using liquid ammonia and albumens as nitrogen sources, using mother solution of glucose, liquid glucose or other molasses as carbon sources, mixing the raw materials in a ratio, adding trace elements to the mixture to form a culture medium, adjusting the pH value and temperature of the culture medium, adding bacteria in a self priming fermentor, performing expansion culture for several times till the requirement for mass production is met, and finally obtaining the finished products of the feed yeast by evaporating concentration and centrifugal atomization drying. Themethod solves the bottleneck that the phytin waste solution and mother solution, which are generated during the production of inositol, cannot be effectively treated, so that the development is restricted and enforces the development of the inositol industry; and the method also has the advantages of maximizing the resource utilization, changing the wastes into the valuables, protecting the environment and increasing the added value of the products.

The invention discloses a re-constructable formed milling cutter for fine machining of a circular-arc-shaped curved mortise of a wheel disc. The re-constructable formed milling cutter comprises a cutter handle part and a cutting part, wherein the cutting part is provided with four spiral-groove cutting edges; each spiral-groove cutting edge is orderly divided into four working sections from the tool nose of the cutting part to the cutter handle part, and six separated blades are detachably fixed to the four working sections; the outer edge of each separated blade is coincident with the outer contour profile of the spiral-groove cutting edge and matched with the spiral-groove cutting edge in shape; and differentiated coatings with gradually-improved performance are orderly applied from the tool nose to the cutter handle part; an internal cooling channel penetrating through the cutter handle part and the cutting part is formed inside the formed milling cutter; and a cutting fluid outlet communicated with the internal cooling channel is formed in the vicinity of each separated blade. The formed milling cutter disclosed by the invention is re-constructable and convenient for replacing the worn and disabled blade, therefore, the uniformity and consistency of the cutting performance of the cutter are realized, the abrasion of the cutter is slowed down, and the production cost is reduced. The re-constructable formed milling cutter is suitable for forming fine machining of the circular-arc-shaped curved mortise of the wheel disc of a low-pressure rotor in a 1200 MW steam turbine in a third-generation nuclear-power CI (conventional island) unit.

The invention discloses a pitching multi-beam weather radar, which comprises a base, an offset antenna reflecting surface, a plurality of feed source loudspeakers, a rotating base, a rotating mechanism, a first servo driver, a transmitting and receiving module, a data processor, a communication module, a power supply module and a power supply, the plurality of feed source loudspeakers are respectively connected with the transmitting and receiving module through a plurality of sets of parallel feed line systems, and generate a plurality of wave beams with pitch angle coverage ranges which are not overlapped with one another at the same scanning moment; and the data processor performs frequency conversion amplification on a frequency modulation signal or a phase encoding signal, then distributes the frequency modulation signal or the phase encoding signal to the plurality of feed source loudspeakers, radiates the frequency modulation signal or the phase encoding signal to the surface ofa detection target through the offset antenna reflecting surface, receives echo signals fed back by the plurality of feed source loudspeakers, and calculates detection target echo information by combining the received echo signals. The phased array weather radar successfully overcomes the defect that an existing phased array weather radar is high in cost, and meanwhile the problems that a traditional weather radar is long in observation time, complex in structure, low in reliability and the like are solved.

The invention relates to a method for preparing high-purity monocrystalline silicon through electrolytic refining-liquid cathode in-situ directional solidification. The method disclosed by the invention comprises the steps of: taking a molten silicon-containing alloy as the anode of an electrolytic cell, placing fluoride electrolyte at the middle layer and placing molten high-purity silicon at the uppermost layer to serve as the cathode so as to form a three-layer liquid electrolytic tank with the molten silicon alloy, the molten electrolyte and the molten high-purity silicon from bottom to top, carrying out constant current electrolytic refining, carrying out in-situ czochralsk directional solidification on the cathode liquid high-purity silicon in the electrolytic refining process to further purify and directly preparing high-purity silicon into the high-purity monocrystalline silicon. The method has the advantages that the polycrystalline silicon is deposited in a liquid form, so that the problems that in the process of preparing solar grade polycrystalline silicon by using a molten salt electrolysis method, the silicon is deposited in a solid form, the product is easy in dendrite forming, the electrical conductivity is poor, the cathode solid-liquid interface is unstable, the deposition speed is low and the current efficiency is low are solved; the preparation flow of the monocrystalline silicon is shortened; and the manufacturing cost of solar grade polycrystalline silicon and monocrystalline silicon batteries can be reduced.

The invention discloses a method for repairing organic contaminated soil by using a micro-emulsion. Water, a solvent and oil are mixed according to a certain ratio on the basis of the Ouzo effect principle, and automatically generate a micro-emulsion without adding a surfactant, and the micro-emulsion has an extremely strong solubilizing ability, so the generated micro-emulsion can be used in thewashing remediation of the organic contaminated soil to make organic pollutants in the soil distributed into the obtained leacheate in order to realize the remediation of the organic contaminated soil. The method has the advantages of simplicity in operation, strong practicability, economical property and environmental protection; and compared with methods using conventional micro-emulsion or surfactant leaching, the method using the automatically generated micro-emulsion free from the surfactant as an eluent has the advantages of high organic matter removal efficiency and solving of the problems of surfactant residue and high surfactant cost.

The invention relates to a double-speed double-shaft-shoulder internal material supplementing type friction stir welding device which comprises a double-speed double-shaft-shoulder mechanism and a material supplementing system, and the double-speed double-shaft-shoulder mechanism comprises a stirring needle, an upper shaft shoulder, a string bearing and a lower shaft shoulder. The double-speed double-shaft-shoulder mechanism is provided with the upper shaft shoulder and the lower shaft shoulder so that the problems that clamping is complex and the tool cost is high can be solved, the working rotating speeds of the upper shaft shoulder, the lower shaft shoulder and the stirring needle are respectively controlled to improve the welding quality, the welding of a space curved surface structure is achieved through control over the two rotating speeds, the material supplementing system mainly comprises a material supplementing part, a rotating sealing connector, a material supplementing conveying pipe and a heating conveying device, in the double-shaft-shoulder friction stir welding process, the supplementary material required by welding is conveyed to a welding area through the material supplementing system, welding and supplementing of the supplementary material are adopted at the same time, defects such as cavities, tunnels, toe heels and cracks in the welding process are avoided, and the welding quality and the welding strength of friction stir welding are improved.

The invention relates to a preparation method for extracting peptide chelated calcium through combined transformation of enzymolysis and chelation, which comprises the following steps: processing waste eggshells from poultry eggs and salted egg white as raw materials, performing pretreatment on the salted egg white, performing a synergistic effect of proteolysis and chelation of ultramicro eggshell powder, and performing impurity removal and extraction to obtain the peptide chelated calcium. According to the preparation method, flavourzyme is added into the salted egg white to decompose protein, supernate obtained after enzymolysis and centrifugation is subjected to phosphorylation treatment, calcium binding sites of peptide are increased, the peptide binding sites and calcium in the ultramicro eggshell powder are chelated to form peptide chelated calcium, and therefore the extraction rate of the peptide chelated calcium is effectively increased. According to the preparation method, waste eggshells and salted egg white are utilized, waste is turned into wealth, and the peptide chelated calcium which is high in solubility and easy to absorb is prepared.

The invention discloses a semiconductor temperature difference matrix power generation device. The semiconductor temperature difference matrix power generation device comprises a semiconductor temperature difference power generation block, a positive temperature copper block and a negative temperature copper block, wherein the positive temperature copper block and the negative temperature copper block are arranged at the two ends of the semiconductor temperature difference power generation block respectively, the semiconductor temperature difference power generation block and the positive temperature copper block are fixed and sealed through fixing silica gel, and the semiconductor temperature difference power generation block and the negative temperature copper block are fixed and sealed through fixing silica gel. The semiconductor temperature difference matrix power generation device enables multiple power generation devices to be converged into an inverter system for power generation, is convenient to operate, solves the problems that an existing temperature difference semiconductor is high in cost and the like, and has the advantages of being good in heat conduction effect, high in power generation efficiency, wide in application range, low in cost, capable of adjusting the generated power according to needs, and suitable for wide-range popularization.

The invention discloses an entomopathogenic nematode HbSD and insecticide thereof, a preparation method and an application. The preparation method of a suspension liquid preparation comprises the steps that last instar flour weevil larvas are infected with the HbSD, red dead insects are obtained on the sixth day, the HbSD continues to be cultured to the tenth day, the HbSD crawls out of dead insect corpses into water, and suspension liquid is obtained; Triton X-100 is added to the suspension liquid, and the entomopathogenic nematode HbSD suspension liquid preparation is prepared. The preparation method of an insect corpse agent comprises the steps that last instar flour weevil larvas are infected with the HbSD, reddish brown dead insects are obtained on the sixth day, and the HbSD continues to be cultured to the ninth day to obtain the insect corpse agent. The suspension liquid preparation and the insect corpse agent have the advantages of being stable in effect, easy to produce, low in cost, free of pollution, high in injurious insect killing activity and the like.

The invention provides a convenient express cabinet using a shared door. The cabinet comprises a cabinet body and a cabinet door; the cabinet door comprises a user special door and a courier shared door; the cabinet body is divided into a plurality of storage boxes by a plurality of transverse partition plates and vertical partition plates, each storage box is provided with the corresponding userspecial door, and the user special door and the courier shared door are arranged on the same side, the opposite side or the two sides of the cabinet body. The user special door and the courier shareddoor are respectively provided with a user special door lock and a courier shared door lock; a courier can open the door lock shared by the courier to deliver or obtain objects in the storage boxes ofthe corresponding users. A user opens a door lock special for the user to put objects into the storage box or obtain the objects in the storage box. Through the design of configuring one household and one box, the problem that the number of traditional intelligent express boxes is not enough is solved, and the intelligent express box has the advantages that the space volume of the storage box canbe adjusted, the delivery and pickup efficiency of courier is high, the cost is low, and the use is convenient, and is suitable for popularization.

The invention discloses a method and a device for active noise reduction for industrial noise treatment, aiming at providing the method and the device for the industrial noise treatment which is high in noise processing effect and low in the cost. The method for active noise reduction for industrial noise treatment comprises steps of (1) practical measurement and sampling modeling, (2) industrial personalized modulation, (3) field application simplification, and (4) informatization remote service. The device for active noise reduction for industrial noise treatment comprises a tubular sound insulation body, a secondary sound source protective housing installed inside the sound insulation main body along the axis of the sound insulation main body through a support, two secondary loudspeakers which are installed in the secondary sound source protective housing back to back through a fixed seat, a controller equipped with a personalized modulating subsonic sound code mode and mode switching programming as required in a claim of right, and two flow-guiding sound transmission protective housings which are installed on two ends of the secondary sound source protective housing; and the controller is arranged on the outside of the sound insulation main body and is electrically connected to the secondary loudspeaker.

The invention relates to an active efficient and environment-friendly distributed energy system and an operation method, and belongs to the field of distributed energy. At present, the shortcoming ofa distributed energy system is that a change is performed on the distributed energy system only, and the energy system is not organically combined with a surrounding environment to form a comprehensive efficient and environment-friendly energy system. According to the active efficient environment-friendly distributed energy system, the distributed energy system and an energy utilization system form an organic whole, so that an interactive, interconnected, efficient and environment-friendly novel energy system is established; the distributed energy system and an external system form a whole, sothat the problems of energy saving and environmental protection are considered from a big system; and the distributed energy system actively provides energy, supercritical water, supercritical carbondioxide and other high-quality substances for the external system, thereby solving the problems of high cost and the like of separately treating high-pollution industrial wastes by an enterprise.

The invention discloses an environmental parameter control system and control method for distribution rooms of several transformer substations in a regional power grid. The environmental parameter control system comprises a transformer substation distribution room environmental parameter automatic control background system, wherein the transformer substation distribution room environmental parameter automatic control background system is connected with a transformer substation distribution room environmental parameter automatic control main station system of a regional power grid centralized control center through a private wire network. By adoption of the environmental parameter control system and control method, the following technical problems can be solved: in the prior art, in-stationdistribution room environment regulating equipment is manually controlled, so that heat cannot be dissipated in time, the temperature of switch bodies is increased to a too high level, primary equipment and secondary equipment are subjected to insulation aging, and the safe running of the in-station distribution room environment regulating equipment is seriously influenced; after an accident happens in one distribution room, harmful gas generated from the accident cannot be exhausted and the post-accident treatment is influenced; according to the running mode, the in-station distribution roomenvironment regulating equipment continuously runs for 24 hours and is easily damaged; and an operator on duty is arranged for in-station monitoring in one transformer substation and the demand for unattended transformer substations is not met.

The invention relates to the steelmaking field, in particular to a converter gas ignition diffusing method and a converter gas ignition diffusing control system. Multiple pairs of ignition electrode stems are arranged on a diffusing tower; the space between each pair of ignition electrode stems ranges from 8 mm to 15 mm; and the multiple pairs of ignition electrode stems are connected to positiveand negative electrodes of multiple high-energy igniters correspondingly one to one. When the concentration of carbon monoxide in converter gas is larger than or equal to 20%, the high-energy ignitersconduct high-voltage discharging and ignition, and the converter gas is directly ignited and diffused. The high-energy igniters are adopted to conduct high-voltage discharging to generate heat so that the converter gas can be directly ignited and diffused. Compared with a method that the converter gas needs to be ignited through natural gas and other auxiliary combustible gas in the prior art, the scheme has the beneficial effects that no combustion assisting gas needs to be additionally introduced, and the ignition and diffusion convenience of the converter gas is improved. The problem thatenergy cost is high when long-burning fire such as the natural gas is used for igniting and diffusing the converter gas in the prior art is solved.

The invention discloses an assembled stage. The assembled stage comprises four supports, aluminum alloy trusses, stage lamps, a projector, an electric hoist and an equipment box, wherein each support is of a rectangular supporting structure, and the aluminum alloy trusses are arranged between every two supports. According to the assembled stage, the stage lamps are directly fixed to the aluminum alloy trusses, each section of aluminum alloy truss and the corresponding support are directly combined and connected into a stage truss during stage assembly, the stage trusses are arranged in a segmented mode, each section is provided with lamplight in advance to form a specific unit (one aluminum alloy truss), each unit is placed in the equipment box with holes in the two sides, the units are connected through fastening screws to be spliced into the complete stage truss, and the rest can be done in the same manner. Traditional four-side stage truss performance units can be spliced instantly, and after construction is completed, the problems that time and labor are consumed and the cost of the performance market is high when trusses, table boards, lamplight, sound equipment and other equipment are assembled on site are solved.