97results about How to "Meet performance index requirements" patented technology

This invention discloses a sort of method of the PID parameter setting of the coordinated control system of the cell-system generating set which belongs to this area of the control technique of the set. This method identifies the multivariable dynamic mathematic model of the unit plant according to the universal structural style. Used the series decoupling principle and the two-degree of freedom control structure the coordinated control system of the unit plant which has the PID form is thought out based this model, thereby the each setting step of the related parameter are get in this system by combining the theoretical derivation and the engineering test. This invention has this character in that the consecution is clear; the practicability is good, and it fits to engineering apply. The engineering technical personnel structures the corresponding coordinated control system expediently, and combines the engineering test aimed at the unit plant of various group, it sets out the related parameter of this system availably.

A radio frequency transceiver of single chip includes a radio frequency receiving part, a radio frequency sending part, a local oscillation part, a reference voltage source and a current bias part. A low noise amplifier, a mixer and a intermediate frequency amplifier possessed by the radio frequency receiving part, an automatic gain regulator adjusting the gain of the radio frequency receiving part according to the intension of the received signal, a power adjuster and a buffer amplifier of a delivered power possessed by the radio frequency sending part, a voltage controlled oscillator, a frequency synthesizer and a crystal oscillator possessed by the local oscillation part, the reference voltage source and the current bias part are integrated to the single chip. The single chip has an input end and an output end of the received signal, which are connected with the receiving part, a filtering end connected with a filter at the outside, an input end and an output end of a signal to be emitted, which are connected with an emission part and a clock signal output end, a signal control end and an oscillation signal input end which are connected with the local oscillation part. In this way, the integration of the radio frequency transceiver is improved greatly.

The invention discloses a multi-objective optimization method for operation of a heavy-load train. The method comprises the following steps of S1, acquiring to-be-optimized section data, wherein the to-be-optimized section data includes a locomotive, vehicle information, marshalling information, line data, line speed limit, time table data and the like; S2, initializing a weight set of an objective function, and the relevant data in the step S1; S3, performing numerical solving for train operation optimization of all long and steep slope sections in a to-be-optimized line range to obtain an energy-saving optimization curve; S4, for multi-objective balance adjustment of a non-long and steep slope, comprehensively utilizing a quadratic programming model and a weight self-adaptive adjusting method, thereby obtaining a stable and energy-saving optimization curve meeting operation indexes; S5, for curve results solved in the steps S3 and S4, performing transition connection meeting the operation stability of the train; and S6, outputting a complete train speed optimization curve. The method has the advantages that on the basis of safety and on-time, stable and energy-saving operation global optimization of the heavy-load train in the whole process including the long and steep slope and the non-long and steep slope is realized.

The invention relates to an improved particle swarm algorithm for automatic optimization of control law parameters of an unmanned aircraft. The particle swarm algorithm is based on an iterative optimized algorithm; control parameters are initialized to be a group of random solutions; and optimal values are found by iteration; the improved particle swarm algorithm is characterized by comprising the following steps of: in the particle swarm algorithm, introducing a crossover operator, selecting a plurality of particles in which the optimal position value of single particle is positioned in the middle to carry out random two-two crossover; generating offspring particles with the same number; replacing parent particles with offspring particles; selecting crossover time according to convergent algebra of the standard particle swarm algorithm, namely, 17 to 20 generations for pitching and yawing channel and 7 to 10 generations for rolling channel; and selecting algebra of disturbing start as follows: starting from twelfth generation for the pitching and yawing channel and starting from fourth generation for the rolling channel. The improved particle swarm algorithm expands the range of understanding the space, has total searching capacity; the obtained parameters can meet given performance indexes; and the algorithm can save design time and has application value of engineering.

The invention relates to a gypsum-based self-leveling mortar prepared from fine iron tailing sand and a preparation method thereof. According to the invention, the raw material fine iron tailing sand of three particle size grades, i.e., less than 0.1 mm, no less than 0.1 mm and no more than 0.3 mm, and no less than 0.3 mm and less than 0.5 mm, is compounded according to a certain proportion. The method totally replaces river sand or quartz sand with the fine iron tailing sand; the prepared gypsum-based self-leveling mortar has excellent performance and completely meets requirements on all the performance indexes prescribed in JC/T1023-2007; moreover, the gypsum-based self-leveling mortar prepared from fine iron tailing sand is obviously reduced in cost, wherein the cost of each ton of the gypsum-based self-leveling mortar is reduced by 30 yuan or above.

The invention provides ketamine-collaurum test paper for detection of saliva. The ketamine-collaurum test paper comprises a reaction film and a gold mark cushion, wherein according to the reaction film, a reaction line and a quality control line are formed by respectively coating ketamine and quality-control secondary antibodies IgG (immunoglobulin G) connected with carrier protein on a nitrocellulose film (NC film); the gold mark cushion is coated with ketamine monoclonal antibodies marked with collaurum; and a film chromatography competitive inhibition method is adopted to detect the ketamine in a saliva sample. The test paper can be used for effectively monitoring the ketamine in saliva, the detection specificity is strong, the repeatability is good, the sensitivity is high, and the lowest detection quantity reaches 50ng/ml. The test paper is simple to operate, does not need special instruments and equipment, does not need professional training and has clear and obvious results, thus being suitable for field detection.

The invention discloses a continuous hot-pressing method for a large-section section. The method comprises a pretreatment process, a continuous hot-pressing process and a post-treatment process, and is characterized in that: the continuous hot-pressing process comprises the following steps of: A, preheating and prepressing; B, hot-pressing and curing; and C, cooling to guarantee quality. In the method, a continuous blanking mode is adopted, the preheating and the prepressing are increased, and a microwave or high-frequency heating technology is adopted during hot pressing. By the method, a non-lumber small-diameter class bamboo material, a secondary material of poor quality, a single-plate residual material, saw dust and the like are machined into a high-quality material; and the method has the advantages of wide material sources, simple and convenient material manufacturing process, high utilization rate of the material, convenience of operation, low energy consumption, investment saving and the like. Meanwhile, the method can be used for machining the material with any length in a continuous pressing mode and can also be used for machining the material with the thickness of 500mm.

This invention relates to a high delivery lift type machine-finished sands concrete. The raw materials are (by weight ratio): cement 400-425, machine-finished sands 780-800, broken stone (grain size=5-16mm)300-310, broken stone (16-25mm) 700-720, water 155-160, coal ash 75-80, water reducing agent 18-24. This inventive concrete has better working properties, its delivery lift can be up to 200m. It can make the equipment being at normal operation.

The invention provides quick setting type rigid repair mortar prepared from industrial byproducts such as coal ash, mineral powder and tailing fine sand as well as a preparation method of quick setting type rigid repair mortar. The coal ash and mineral powder-based geopolymer quick setting type rigid repair mortar consists of a solid component material and a liquid component liquid; the solid component material is formed by combining the coal ash, the mineral powder, the tailing fine sand and a chemical additive according to a certain proportion; the liquid component material is formed by mixing a sodium hydroxide solution with a certain concentration, waster glass and water according to a certain proportion; and the solid component material and the liquid component material are stirred completely and uniformly according to a certain proportion, and the quick setting type rigid repair mortar can be used. The coal ash and mineral powder-based geopolymer quick setting type rigid repair mortar prepared by the method has excellent performance and completely meets each perform index requirement of JC/T 2381-2016. The main raw materials of the coal ash and mineral powder-based geopolymerquick setting type rigid repair mortar are industrial byproducts such as the coal ash, the mineral powder and the tailing fine powder and belong to environment-friendly materials.

The invention discloses a method for toughening a piece of 12mm toughened glass. The method comprises the following steps of horizontally placing the glass to be processed onto a roller bed, delivering the glass to be processed into a passage type toughening furnace through the roller bed, sequentially conducting heat treatment at intervals, and cooling two surfaces of the glass through high-pressure air until the surface temperature of the glass reaches 330 to 350 DEG C; placing the glass into 10 to 15 percent potassium nitrate glycerol solution at the temperature of 150 to 160 DEG C to be cooled for 3 to 4 minutes; then placing the glass into the potassium nitrate fused salt at the temperature of 350 to 360 DEG C to be heated for 5 to 6 minutes; and taking out the glass to be naturally cooled in the air. Through the interval heating and cold treatment, the stress distribution on the surface of the glass is adjusted, and the flatness of the toughened glass is guaranteed; and through the treatment in the potassium nitrate glycerol solution and the potassium nitrate fused salt, the toughened degree of the glass surface is increased, the self cracking possibility of the glass in the cooling process can be reduced, the yield of finished products of the toughened glass can be increased, and the performance index requirement of the toughened glass can be met.

The invention discloses gypsum-based heat-insulation mortar and a preparation method thereof. The gypsum-based heat-insulation mortar is prepared from the following ingredients in parts by weight: 15to 25 parts of Portland cement, 30 to 40 parts of building plaster, 10 to 20 parts of glass bead, 10 to 30 parts of converter steel slag, 10 to 20 parts of coal ash, 5 to 15 parts of nano silicon dioxide powder, 15 to 25 parts of ash calcium powder, 5 to 10 parts of modified pulpified starch, 2 to 8 parts of dispersible latex powder, 5 to 15 parts of cellulose ether, 3 to 8 parts of crack-resistant fiber, 5 to 15 parts of modified talcum powder, 4 to 10 parts of binder, 0.3 to 0.7 part of air entraining agent, 0.2 to 0.6 part of water repellent, 0.1 to 0.5 part of water reducing agent and 40 to 60 parts of water. The gypsum-based heat-insulation mortar disclosed by the invention has the advantages of high strength, good heat insulation, small drying shrinkage, no easiness in cracking and the like. The gypsum-based heat-insulation mortar can meet a requirement of building industry to mortar performance indexes and can be widely applied to projects of heat insulation and the like of outer walls and inner walls of buildings.

The invention relates to an amplifying, mixing and filtering device for a GNSS receiving set. The amplifying, mixing and filtering device comprises a high gain and gain controllable low noise amplifier, a passive orthogonal mixer assembly and a multi-phase filter which are sequentially connected. The device adopts the novel low noise amplifier which adopts a current source load, so that the gain is increased greatly, and the gain controllable function is realized. Simultaneously, compared with a conventional lower noise amplifier with an inductive load, the manufacturing cost is reduced substantially due to the fact that the low noise amplifier doesn't comprise a load inductor with a larger chip area. Due to the high gain of the low noise amplifier, the noise margin of a circuit to a post-module is increased, so that two later orthogonal demodulation mixers of the circuit can adopt the passive frequency mixer and the multi-phase filter which are free of current consumption, and the power consumption is reduced. By means of the high gain and gain adjustable function of the circuit, the design requirement of the post-module is reduced, and the overall power consumption is further reduced.

The invention discloses an inorganic calcium sulfate whisker heat retaining panel. The inorganic calcium sulfate whisker heat retaining panel is characterized by being prepared from the following raw materials in percentage by weight: 30-50% of calcium sulfate whisker, 0.1-10% of Portland cement, 0.1-10% of silica fume, 2-5% of water-proofing agent and 30-50% of water. The invention also discloses a preparation method of the inorganic calcium sulfate whisker heat retaining panel. The inorganic calcium sulfate whisker heat retaining panel provided by the invention has the advantages of Al-grade fireproofing, light weight, high strength, excellent waterproof property, low heat conductivity coefficient and the like and is a high-quality heat retaining panel for building external walls, which has practical application value. According to the preparation method, a one-step molding method is adopted, and the technological processes comprise dry material premixing, liquid material premixing, pulping, standing still, molding, demolding, drying, high-temperature thermal treatment and the like.

The invention discloses 400 Mpa-grade construction steel with excellent corrosion resistance and a production method, and belongs to the field of production of construction corrosion steel. The steel comprises the following components by weight percent: 0.05% to 0.3% of C, 0.2% to 0.6% of Si, 1.2% to 1.6% of Mn, 0.03% or less of P, 0.02% or less of S, 0% to 1.9% of Cr, 0.25% to 1% of Cu, 0.4% to 1% of Ni, 0.1% to 0.5% of Mo and 0.01% to 0.02% of N, and the balance being Fe. The construction steel with excellent corrosion resistance is obtained through the adoption of a vacuum smelting-low temperature rolling-controlled rolling and controlled cooling production method, optimization of selected multi-group components, and optimization of technologies. The 400 Mpa-grade construction steel has the advantages that the steel has excellent corrosion resistance, so that the steel can be utilized in concrete structures with ultrahigh strength and ultrahigh strength design requirements in severe conditions like marine environment and marshland; and the innovation point is that optimal alloy elements like chromium are optimally selected, so that the 400 Mpa-grade construction steel has excellent corrosion resistance.

The present invention discloses a permanent magnet synchronous motor universal control system and a control method thereof. The system comprises a control board and a driving board; the control boardcomprises a motor controller module, the driving board comprises an intelligent power module, a bus voltage detection circuit, a direct current link current detection circuit, a phase current detection circuit, an encoder, a Hall sensor and a rotary transformer interface circuit; three-phase output end of the intelligent power module is connected with a permanent magnet synchronous motor; and themotor controller module is configured to perform comprehensive processing of phase current signals and rotor position information and output three-phase and six-way PWM signals with an expected targetso as to control on-off of an inverter switching tube in the control intelligent power module and control operation of the permanent magnet synchronous motor. The permanent magnet synchronous motor universal control system and the control method thereof can support a plurality of rotor position detection modes with sensors and without sensors to ensure stable operation of the motor in various complex conditions, and employ the ideal based on the model design to establish a system simulation model and help users with improvement of development efficiency and reduction of development cost.

The invention discloses a glass fiber direct yarn impregnating compound which comprises the following components in percentage by mass: 5-12% of solid and the balance of water, wherein the percentageof the solid mass of each component in the impregnating compound in the solid mass of the impregnating compound is as follows: 5.5-20.5% of a coupling agent, 9-20% of a lubricant, 51-82% of a film-forming agent, and 2-8.5% of a pH value regulator, wherein the film-forming agent is a mixture of epoxy resin emulsion and polyurethane emulsion, and the mass ratio of the epoxy resin emulsion to the polyurethane emulsion is 1.42:1 to 4:1. After asphalt is coated with the impregnating compound, the strength is high, and various index requirements of the geogrid are met.

The invention discloses a polypropylene non-woven fabric waste recovery process. The process sequentially comprises the steps that (1), non-woven fabric waste is delivered into a forcing feeding screwrod machine on the second floor through a collecting retracting box and roller tubes; (2), the waste is winded and squeezed by the forcing feeding screw rod machine, and pulling force is generated topull the waste into the feeding machine repeatedly, and the non-woven fabric waste is delivered into a heating tube to be heated and melted after squeezing and tearing are conducted; (3), melted waste material is uniformly mixed with raw material particles according to a certain ratio, and polypropylene fibers are prepared through a spinneret device; (4) the polypropylene fibers on which spinningis conducted are prepared into fiber layer through laying passing through a receiving device, a layer of polypropylene fiber is added to the fiber layer through a conveying belt, and non-woven fabricis prepared through hot pressing rolling; (5) rolled non-woven fabric is placed on a cutting machine to cut into non-woven fabric products with specific width dimensions. By means of the process, dried body mass is improved, and product yield is greatly improved.

The invention discloses a synthetic method for a core-shell quantum dot which is capable of realizing emission of blue light to green light and possesses a uniformly-alloyed core. The core-shell quantum dot employs uniformly-alloyed cadmium selenide sulfide CdSexS1-x as a core and employs CdS as a shell, and the composition is shortly named CdSexS1-x/CdS, wherein x=0.05-0.60. By controlling the molar ratio of a sulfur source to a selenium source, the usage amount of a cadmium source and a ligand, and the reaction temperature and time in the synthesis process of the core-shell quantum dot, the emission peak wavelength of the core-shell quantum dot is continuously adjustable in the scope of 460-530 nm. The synthetic method has green and economic characteristics, the synthesis process and the product structure and performances are highly controllable, and the method is applicable to large-scale preparation of the quantum dot.

The present invention relates to the field of surface mounting technology, and specially discloses a housing lead wire used for a surface-mount package of a microwave device and a connecting structure that uses the lead wire. The lead wire is flat and ribbon-shaped, is provided with a bending section that is omega-shaped and that has a radius of 0.10 mm - 0.30 mm, and the lead wire, except the bending section, is a straight line segment. The bending section is an arc that is a semicircle or greater than a semicircle. Two straight line end portions of the lead wire are a lead-in end and a lead-out end respectively; the lead-in end is used for connecting a package housing; the lead-out end is used for connecting a printed circuit board; and the bending section of the lead wire is close to the lead-out end. In the connecting structure, the distance between a bending degree and a ceramic base is 0.10 mm - 0.30 mm. According to the housing lead wire used for a surface-mount package of a microwave device and the connecting structure, a lead wire has better tensile and anti-plastic deformation performance, and also has a better microwave electric signal transmission capability; and by applying the lead wire to a microwave device, a tensile stress that the lead wire exerts on a housing when a temperature changes can be reduced or eliminated, and reliability of the device and better microwave performance can be ensured.

The invention discloses a tempering processing method for 8-12mm tempered glass. The tempering processing method comprises the following steps of adding glass into dimethicone which is at a temperature of 160 DEG C to 180 DEG C and heating for 5-10 minutes, placing the glass horizontally to a roller bed, conveying the glass to a channel-type tempering furnace by the roller bed, and carrying out heat treatments at different temperature ranges sequentially. According to the fact that the tempering processing method employs different temperature ranges for heating, a preheating treatment and a final heat treatment, the stress distribution of the glass surface is adjusted, the smoothness of the tempered glass is guaranteed, the tempered degree of the glass surface is increased, the self-destruction probability in a cooling process of the glass is reduced, the yield of the tempered glass is increased, and performance index requirements of the tempered glass are satisfied.