40results about How to "Meet engineering design requirements" patented technology

The invention discloses a cellular denitration catalyst regenerating solution for a coal fired power plant and a regenerating method thereof. The regenerating solution comprises a cleaning solution and an activated replenishing solution, wherein the cleaning solution contains H2SO4 and an emulsifying agent S-185; the activated replenishing solution contains VOSO4 and ammonium paratungstate; and ultrasonic cleaning is adopted in the cleaning method. The regenerated catalyst has relative activity (K/Ko) of 0.95-0.99 and SO2/SO3 conversion rates of both less than 1 percent and meets the requirement on the engineering; and the regenerating process is simple in operation and is suitable for industrialized massive regeneration.

The invention belongs to the technology of airplane structural strength and relates to a prejudging method for the static-test load carrying capacity of a wing structure. The prejudging method of the invention comprises the steps as follows: establishing a finite element model according to a wing structure before carrying out an actual test, and performing elastoplasticity and large deflection nonlinear finite element analysis to the model to obtain a wingtip deflection-load curve; determining maximum load carrying capacity of the wing structure according to the variation characteristic of the wingtip deflection-load curve and giving out the breaking load of the wing structure; obtaining a dangerous portion of the wing structure and the process form the unstable condition to the destructive condition and pre-judging the static-test load carrying capacity of the wing structure. According to the invention, the error between the calculated breaking load and the tested breaking load is 6.25 percent. The calculated dangerous part and the tested breaking portion are consistent. The calculated process form the unstable condition to the destructive condition is consistent with the tested unstable process. The method of the invention provides a guarantee for the one-time success of the static test of the structure and provides reference for evaluating the structural strength of the wing.

The invention discloses an intelligent and healthy awakening system. The intelligent and healthy awakening system comprises a central processing unit, a light ray control module, a music control module, an environment control module, a communication module and a handheld terminal. The central processing unit is connected with the light ray control module, the music control module, the environment control module and the communication module. The communication module is in wireless connection with the handheld terminal. The intelligent and healthy awakening system is novel in design, convenient to operate and capable of awakening sleeping people gradually through light rays, sound, temperature and the like; experience in the whole awakening process is good, and the intelligent and healthy awakening system is reasonable and scientific, meets the design requirements of human engineering, and replaces a sudden awakening mode in the prior art, thereby improving the sleeping quality of people and promoting physical and mental health of human bodies.

The invention relates to size and a method for treating recycled coarse aggregates, and belongs to the field of concrete recycled aggregates treating agents and concrete recycled aggregates treating. In order to solve the technical defects that the strength of the recycled coarse aggregates is low due to high water absorption and large porosity, the invention provides the size and the method for treating the recycled coarse aggregates. The size for treating the recycled coarse aggregates comprises sulphoaluminate cement, admixtures and water. The sulphoaluminate cement of the size permeates into the recycled coarse aggregates, so that the microcracks generated in recycled coarse aggregates crushing are filled to a certain degree; meanwhile, through the use of the dilution and nucleation effects of the admixtures and Ca(OH)2 enriched in old mortar of the recycled coarse aggregates consumed in secondary hydration reaction, the mortar structures of the recycled coarse aggregates are improved, so that the strength of the waste concrete recycled coarse aggregates is improved. After the size and the method are adopted, the crush indexes of the recycled coarse aggregates are remarkably reduced and meet the requirement regulated Pebble and crushed stone for construction GB/T14685-2011.

The invention relates to a preparation method of recycle aggregate concrete, belongs to the field of preparation methods of cement concrete, aims at solving the problems of poor mechanical performance and poor durability of recycled aggregate concrete prepared by a traditional molding process, and provides the preparation method of the recycled aggregate concrete capable of improving the microstructure of a recycled concrete interface transition region to improve the performance of the recycled concrete. The preparation method comprises the following steps of: absorbing and airing the recycled aggregate until the surface of the recycled aggregate is dried, and uniformly mixing and stirring with admixture and water reducing agent; uniformly stirring with the first part of water, and uniformly stirring with cement and natural aggregate; and uniformly stirring the second part of water. The recycled aggregate concrete prepared by the method can be used for effectively reducing the interface transition region and improving the microstructure of the interface transition region, so that the interface transition region around the recycled aggregate is compact; and the interface bonding strength between the recycled aggregate and cement in the concrete can be greatly improved.

The invention discloses a feedback decision type large-dynamic self-adaption array antenna beam forming method. According to the method, a transmitter transmits sign frames periodically, and a self-adaption array antenna on a receiver selects different weight vector calculating methods according to decision feedback on base band demodulation signals. The array antenna of the receiver comprises an array face, a weight value generating module, a beam forming module, a signal processing module and a sliding correlation module. The signals generated after beams are formed are demodulated by the signal processing module, and then base band signals are output; sliding correlation operation is performed on the base band signals and local pseudo-random codes, the correlation operation result controls a weight vector calculating method in the weight value generating module, working is performed in the phased array mode if the sliding correction module outputs the correlation peak, and working is performed in the anti-interference mode if the sliding correction module does not output the correlation peak. The method overcomes the self null steering problem of self-adaption array antenna expectation signals under large dynamic, is easy to achieve in engineering and can be applied to various anti-interference wireless communication transmit-receive systems.

An optimizing and designing method of a rib type phase change heat storage device includes the steps of firstly, determining the heat flow density of the lower base plate of the rib type phase change heat storage device and the section surface density upper limit of the same; secondly, taking the part, along the height direction and between the symmetrical shaft, of two adjacent ribs of the rib type phase change heat storage device as the typical analysis unit, and taking half of the typical analysis unit as one analysis unit; thirdly, building a two-dimensional heat transfer model of the one analysis unit; fourthly, initializing W, calculating the temperature difference when the heat storage materials are totally melted according to the two-dimensional heat transfer model, and optimizing to achieve the minimum temperature different to obtain optimized half distance W between the adjacent ribs; fifthly, calculating the thickness S2 of the ribs according to the optimized W, and determining the section surface density rho of the device, judging whether rho is larger than rho1 or not, if so, increasing the optimized W, and optimizing from the fourth step; or else, designing the rib type phase change heat storage device according to the optimized W and S2.

The invention relates to a pressure bearing tunnel bottom structure drainage system and a construction method thereof. A central drain is arranged in the tunnel, each of the two sides of the tunnel is provided with a drainage side ditch, a pressure bearing permeable material is embedded in a transverse drain passage that forms the drainage side ditch and the central drain in the concrete, and a vertical drain passage is buried under the central drain; fabric or rope is chosen as the pressure bearing permeable material. According to the construction method of the pressure bearing tunnel bottom structure drainage system, a pressure bearing permeable material is embedded in the side ditch of the tunnel bottom and the central drain, the central drain and the tunnel bottom, the water in the side ditch can be guided to the central drain smoothly, underground water is guided and discharged to the central drain, the pressure at the tunnel bottom is reduced effectively, the damage of the tunnel structure caused by the pressure at the tunnel bottom is reduced.

The invention provides bi-component polyurethane putty special for concrete surface treatment, and belongs to the field of chemical materials. A polyurethane primer special for the concrete surface treatment is characterized in that: a bi-component polyurethane system, namely an isocyanate component A and a resin component B, is used. The invention has the advantages that: the bi-component low surface tension polyurethane putty is suitable for filling and repairing planar defects (such as pin holes, air holes, pits and the like) of the concrete surface.

The invention provides a ring-focus antenna minor face medium supporting cover and a manufacturing method thereof. The medium supporting cover is of a thin-wall circular truncated cone whole sealing structure. The medium material of the medium supporting cover is formed by combination of epoxy resin and a high-strength S glass fiber reinforcement material, and an antioxidant material and an ultraviolet ray absorbing material are also included in the medium material. According to the ring-focus antenna minor face medium supporting cover and the manufacturing method thereof, a traditional antenna minor face metal brace rod is replaced with the antenna minor face medium supporting cover, and by means of the selection of medium material and backstepping design and machining of a forming die, the manufactured antenna minor face medium supporting cover has the advantages that the dielectric property is excellent, rigidity is high, the specific gravity is small, and the outer surface roughness meets requirements of engineering design; a test on a horn and a minor face combined feed source shows that compared with the traditional antenna minor face metal brace rod, the antenna minor face medium supporting cover has the advantages that influence on a scattering directional diagram is small, standing waves are not influenced, and only the radial direction is slightly changed.

The invention provides a method for calculating the compressive strength of pervious concrete, which comprises the following steps of: on the basis of certain correlation between the strength of the concrete and the apparent density of the concrete, after the pervious concrete is formed, obtaining a test piece in a core drilling sampling or embedded part manner, testing the apparent density of the concrete test piece and the corresponding 28d-age compressive strength, and then performing linear regression analysis by taking the apparent density as a horizontal axis and the 28d-age compressive strength as a longitudinal axis to obtain a relational expression between the 28d-age compressive strength and the apparent density. Compared with an existing method for predicting the compressive strength of the on-site pervious concrete by using an indoor manufactured standard test piece, the method disclosed by the invention can avoid the influence of a size effect generated by non-uniform test pieces on the compressive strength, and whether the compressive strength of the premixed concrete at the 28d age meets the requirement can be predicted by substituting the apparent density obtained by testing into a fitting equation.

The invention discloses a preparation method of a polycarboxylate superplasticizer for small-slump concrete. The preparation method comprises the following steps: 1, an ethylene glycol monovinyl polyethylene glycol ether macromonomer, tap water, sodium hydroxide, unsaturated carboxylic acid and 2-acrylamide-2-methylpropanesulfonic acid are added into a four-necked flask one by one, and are uniformly stirred; 2, unsaturated carboxylic acid, tap water and other materials are uniformly mixed to obtain a solution A, and a reducing agent and tap water are uniformly mixed to obtain a solution B; 3,the solution A and the solution B are dropwise added into the four-necked flask at the same time and are reacted; and 4, the pH value of a polymer prepared in step 3 to 5-7 by using an alcohol amine monomer. The polycarboxylate superplasticizer synthesized by adopting the novel polyether in the preparation method improves the wrapping property and winding property of a polyether side chain, so theconcrete has good workability and good flow retentivity, the plasticity and cohesiveness in small-slump concrete are improved, and hysteresis bleeding is avoided; the polycarboxylate superplasticizerhas low sensitivity to the water consumption of concrete, and has a good water-retaining property; and the preparation method has the advantages of simple production process, no generation of wastes,greenness, environmental friendliness, short reaction period, and easiness in realization of large-scale production.

The invention discloses a construction method of a static pile press machine for guiding a hole and excavating in the middle. The construction method comprises the following steps of: 1, placing the pile press machine in place; 2, installing a pipe pile; 3, hydraulically delivering the pile in a top soft soil layer; 4, installing a drill bit and a drill rod; 5, guiding the hole and excavating in the middle and delivering the pile in a force-holding hard soil layer; 6, reaming the force-holding hard soil layer; 7, pouring the pile bottom; and 8, finishing the pile foundation. The invention also discloses the static pile press machine for guiding the hole and excavating in the middle, which implements the method. The equipment and the construction process are synchronously improved, the foundation soil layer under and on the side part of the pipe pile is excavated and drilled by combining the bottom-expanding drill bit and the spiral drill rod, the diameter of the drilled hole is greater than that of the pile, and the hole guiding, the middle excavating and the pile pressing are synchronously performed, so that the construction efficiency and the construction quality are greatly improved, and the construction cost is reduced; and the static pile press machine for guiding the hole and excavating in the middle can overcome the defect that the static pile press machine difficultly passes through the hard sand layer, so that the pile-sinking foundation smoothly reaches the designed bearing stratum, the stratum adaptability of the equipment is increased, and the design requirement of the pile foundation engineering can be met.

The invention discloses an underwater wireless optical communication optical channel simulation method and simulation system. The method comprises the steps: selecting a to-be-simulated light source type, generating an optical pulse, and defining the initial position of a photon and a current direction cosine; defining different water quality parameters according to different water quality types; randomly selecting an optical path, a scattering angle, an azimuth angle and the like, updating a photon weight, and simulating channel transmission of photons under a selected water quality condition; and marking and counting the detected photons at a receiver end. The problems that underwater light field data is difficult to collect and test, and the overall system of the underwater optical communication system is difficult to design and verify can be solved, a system simulation tool is provided for designers, various parameters of the underwater optical communication system are fully considered, the parameters can be changed according to actual project requirements, and the engineering design requirements are met.

The invention discloses a design method of a large-curvature cable-membrane structure, and aims to solve the technical problems that the existing cable-membrane structure is easy to generate larger deformation to change the shape size or loosen, and the analysis and design theory of the cable-membrane structure at home and abroad is not completely mature. The design method comprises the following steps: (1) carrying out performance analysis on a membrane material to be used by the large-curvature cable membrane structure; (2) adopting ANSYS software to carry out shape finding analysis on the large-curvature cable membrane structure; (3) selecting a membrane material with a proper thickness; (4) optimizing a reinforcing cable net in the large-curvature cable membrane structure; (5) carrying out technical verification and hardware optimization on the large-curvature cable membrane structure; and (6) designing proper light transmittance of the membrane material. According to the design method, a collaborative stress system of the steel cable, the membrane material, the hardware and the cable membrane support steel structure is optimized, the overall stress stability of the structure and the applicability of the component are improved on the premise that the material performance is brought into full play, and the building body art is perfectly expressed.

The invention discloses a three-dimensional periodic cushion vibration reduction ballast bed vibration isolation frequency band regulation and control design method, which comprises the following steps: starting from a wave equation of an ideal elastomer, expanding a material coefficient and an amplitude modulation function of a Blot wave into Fourier series under the basic assumed condition that a three-dimensional periodic cushion vibration reduction ballast bed is infinitely and repeatedly arranged along three periodic directions; expanding the elastic wave equation in a reciprocal space by plane waves to obtain an eigenvalue equation; enabling the reciprocal lattice vector to sweep the irreducible Brillouin zone to solve the energy band structure of the three-dimensional periodic cushion vibration reduction ballast bed; and determining a vibration isolation frequency band according to the forbidden band distribution range, obtaining the change rule of the forbidden band and the vibration isolation frequency band along with geometry and material parameters through influence factor analysis, and realizing active regulation and control of the forbidden band and the vibration isolation frequency band. The method is simple in basic theory, clear in physical significance, wide in applicability and convenient to use, and a calculation result can completely meet engineering design requirements.

The invention discloses a three-dimensional design method for an inclined suspension type tubular busbar of a transformer substation, which belongs to the technical field of transformer substations and comprises the following steps of: writing parameters at the front end of an inclined suspension type tubular busbar calculation device; creating an SQL basic database at the rear end of the inclined suspension tubular busbar calculation device; calculating and checking the displacement and deflection of the tubular busbar by the inclined suspension tubular busbar calculation device; and generating and modifying the model by an inclined suspension tubular busbar model generation device. According to the method, by developing the inclined suspension tubular busbar calculation device and the inclined suspension tubular busbar model generation device, model generation and calculation check are closely combined, it is guaranteed that the generated inclined suspension tubular busbar model meets the engineering design requirement, the mapping relation between inclined suspension tubular busbar calculation data and a model entity is generated, a more effective and more accurate geometric model is established, and automatic three-dimensional design of the inclined suspension type tubular bus of the transformer substation is achieved.

The invention discloses a water purification treatment system for a high-iron-manganese-silicon water source. The water purification treatment system comprises a first-stage lifting pump, a first-stage pipeline mixer, a first-stage contact tank, a gas-liquid mixing pump, an aeration contact oxidizer, an electric flocculation facility, an electric flocculation water outlet tank, a second-stage lifting pump, a second-stage pipeline mixer, a filter, a backwashing unit, an ultraviolet sterilization device and a dosing unit, the backwashing unit comprises a backwashing water tank and a pressure pump, and the dosing unit comprises a sodium hypochlorite dosing device, a first sodium hydroxide dosing device and a second sodium hydroxide dosing device. The treatment system is simple in composition, low in cost and concise in water treatment process, solves the problems of removal, disinfection and the like of iron, manganese and silicon in underground water raw water, has a good purification effect on the high-iron-manganese-silicon underground water raw water, the purified effluent meets the sanitary requirement of drinking water, and the finally treated water can be used as product production water and living water. The treatment system is small in occupied area, convenient to move, capable of meeting engineering design requirements and convenient to operate and use.

The invention discloses a method for calculating the bearing capacity of a single stringer short plate, and the method comprises the steps: obtaining the skin thickness and section area of a to-be-calculated single stringer short plate, and calculating the pressure loss strength of the single stringer short plate; calculating the compression stress of the single stringer short plate based on the length of the single stringer short plate, the inertia moment and area of the section and the pressure loss strength; under the condition that the single stringer short plate bears the uniform axial compression load, calculating the local buckling stress of the single stringer short plate skin; when one side of the single stringer short plate is in a free state, calculating the effective width of the single stringer short plate skin by utilizing the pressure loss strength, and calculating the effective area of the single stringer short plate skin based on the effective width; and calculating the failure load of the single stringer short plate on the basis of fully analyzing the failure mode and failure mechanism of the reinforced short plate. According to the method, the real bearing capacity of the single stringer short plate can be accurately calculated, and the problems that an existing method is complex in calculation process and large in calculation error are effectively solved.