831 results about "Price ratio" patented technology

Simulation test equipment for validating the reliability of satellite attitude control and a test method thereof belong to the field of satellite attitude control. The test equipment comprises a ground simulation support module, a fault injection module and a satellite-born module, wherein, the ground simulation support module includes a monitoring terminal, a satellite model, a signal exciting source and a moment reverse-solution unit; the fault injection module includes an analog-to-digital converter, a signal transfer circuit, a fault injection processor, a man-machine interface unit and a digital-to-analog converter; and the satellite-born module includes a sensor, a satellite-born controller and an actuator. The test method comprises the following steps of: fault model setting; satellite initialization; orbit and attitude information renewal; the satellite-born controller collects signals of the sensor and outputs actuator command signals to the fault injection module; the actuator receives actuator pseudo command signals and outputs feedback signals to the fault injection module; the moment reverse-solution unit collects the pseudo feedback signals output by the fault injection module and outputs moment control signals to the satellite model. The equipment and the method of the invention have high feasibility and high performance-price ratio.

The invention discloses an optimization system of media selection in network advertisement delivery and a method thereof. The system comprises a client, a data processor terminal and a database terminal. Through the combination of a principal component analysis method and an optimization model, an optimal media delivery program is obtained, by using historical delivery data (including clicks, show, CTR, CPC, and CPM) of an advertisement position, a main factor influencing an advertisement effect is extracted through the principal component analysis method, thus the optimization model of media combination is established, a solution of the model is calculated through a solver, an optimized media combination is presented to an advertiser finally, recommended media combination is more accurate, and the advertisement effect with a high performance price ratio is reflected.

The invention relates to thermal resistant magnesium-base rare earth alloy and the preparing method. The alloy comprises following components: Gd 6-8wt%, R 1- 5wt%, Zr 0.3-0.6wt%, mixture of Ni, Cu, Fe, Si and Al, not more than 100 wt%, and the left is Mg. The general formula is Mg-(6-8%)Gd-(1-5%)R-(0.3-0.6%)Zr, R is Nd, or Sm, or MY, or Dy or Ho, or Er; and the RE total weight in alloy is controlled between 7%- 13%. The invention is to solve problem of less varieties of available rare earth thermal resistant magnesium alloy, and to provide high- performance thermal resistant magnesium-base rare earth alloy with proper amount combination of GD and RE and the preparing method. The invention employs cheap MY to replace pure Y for alloy element, which can not only guarantee good comprehensive performance, but aslo reduce aloy cost, and gets high perfromance price ratio alloy.

The invention provides a bamboo-plastic composite material which is obtained by that raw materials such as plastic, recycled waste plastics, bamboo powder, modifier, chemical agent, lubricant, etc. are mixed in different proportions and extruded out to get series bamboo-plastic granule; the invention can be used for manufacturing different products such as bamboo-plastic boards, wood-plastic composite profiles and wood-plastic tubular products, etc. through extruding. The series bamboo-plastic granule can be produced in a continuous large volume and is characterized in that the production efficiency is high, the cost is low and the performance-price ratio is high, etc. The series bamboo-plastic granule can be used for replacing wood, and the cost thereof is lower than wood-plastic materials while the mechanical strength thereof is higher than wood-plastic materials, therefore the series bamboo-plastic granule can be widely popularized for use. The series bamboo-plastic granule is a novel cyclically reutilized material resource after wood-plastic material.

The invention relates to a high-strength waterproof extrusion molding gypsum-based composite ecological wallboard and is made of the following materials with the following weight ratio: 15 to 56 percent of gypsum binding material, 10 to 20 percent of potential active powder, 3 to 15 percent of alkali-activator, 30 to 80 percent of filler, 0 to 1.0 percent of strengthening material, 0 to 3 percent of accelerant, 0 to 0.8 percent of early strength agent, 0 to 1 percent of water reducing agent and 0 to 0.5 percent of retarder. The high-strength waterproof extrusion molding gypsum-based composite ecological wallboard is high in strength, good in waterproof performance, low in production cost, low in drying shrinking rate, fast in hardening, and high in performance-price ratio.

A sludge solidification method is a method for carrying out solidification treatment to the sludge produced in water conservancy projects and civil engineering. The method is that: a. the liquid water content, the clay content and organic content of dredging sludge are tested. b. curing agent is prepared: the curing agent mainly contains cement and calcium oxide which play the function of solidification; wherein, the weight proportion is between 1 : 1 to 4 : 1; waste gypsum is used as water reducing agent which occupies 1 to 8 percent of the sum of cement and calcium oxide in proportion; mealy sand or pulverized fuel ash are used as concrete aggregate which occupies 3 to 5 percent of the sum of the cement and calcium oxide in proportion; c. the curing agent-mixing ratio which is usually controlled from 5 to 20 percent is determined; sampling respectively is carried out, setting time is tested and the unconfined compressive strength which maintains 7, 14 and 28 days is tested by sampling, and the curing agent-mixing ratio finally is determined according to optimal performance price ratio; d. the sludge is carried out curing and constructing in site; mechanical devices are used for stirring the curing agent and the sludge rapidly and evenly, thereby leading the solidification to be rapid and full.

The invention provides an ultra-wear-resistant alumina ceramic ball. The ultra-wear-resistant alumina ceramic ball comprises the following chemical components: 90-95% by weight of Al2O3, 5-8% by weight of SiO2, 0.3-0.5% by weight of CaO, 0.5-0.9% by weight of MgO, 1-2% by weight of ZrO and 0.1-0.5% by weight of La2O3/Y2O3, wherein the equivalent wear loss is less than 72 per mil. A provided preparation method comprises the following process steps of: adopting alumina powder and other mineral raw materials for burdening, refining mud, drying, calcining, synthesizing, ball-milling, granulating, forming and firing to obtain a product. According to the invention, the wear resistance of the product can achieve the standard of the alumina ceramic ball; and furthermore, the ultra-wear-resistant alumina ceramic ball has the advantages of lower cost of the raw materials, better grinding performance and high performance-price ratio of the product, is more suitable for being applied in production, and can reduce the production cost of an enterprise and improve the production efficiency of the enterprise.

The invention provides equipment failure early-warning system and method. The equipment failure early-warning system has reliable operation, high performance-price ratio and visual interface, can transmit accurate equipment failure early-warning signals in advance and has failure type self-learning function. The equipment failure early-warning method comprises the following steps of: arranging proper types of sensors on proper positions of equipment to collect the parameters, such as bearing temperature, pressure, body vibration waveform, current variation waveform, and the like of the equipment; digitizing signals collected by the sensors by adopting a low-speed data collecting module and a high-speed data collecting module; developing specific computer software to process, store and analyze the various kinds of collected data; realizing the timely time-domain frequency-domain exchange and analysis of the waveforms, such as vibration, electric current, and the like by the software by using the mathematical methods of Fourier transformation, Wigner-Ville distribution, Hilbert-Huang transform, wavelet analysis, and the like; evaluating the various detected parameters by using a scoring method of an established file; and discovering and diagnosing the early exception of the equipment, thereby early warning the equipment failure. The equipment failure early-warning system adopts a modularized framework and comprises four modules of a sensor module, a data collecting module, a data processing module and a self-learning intelligent early-warning platform, the four modules are connected by a data transmission network, and a detection mode can adopt an on-line monitoring mode and a portable point detection mode.

The invention discloses a centrifugal composite casting technology for a cold working die steel roll collar used for a rail beam and section mill. The chemical compositions by weight percentage are as follows: outer layer compositions: 1.2 to 2.0 percent of C, less than 0.05 percent of P, less than 1.0 percent of Si, less than 0.05 percent of S, less than 1.0 percent of Mn, less than 1.0 percent of Ni, 10 to 15 percent of Cr, 0.1 to 1.0 percent of Mo, 0.1 to 1.5 percent of V, and the balance being Fe; core compositions: 1.2 to 3.0 percent of C, less than 0.05 percent of P, 1.0 to 3.0 percent of Si, less than 0.05 percent of S, 0.5 to 2.0 percent of Mn, less than 1.0 percent of Cr, less than 1.0 percent of Ni, less than 1.0 percent of Mo, and the balance being Fe. The centrifugal casting technology is adopted to manufacture the cold working die steel roll collar used for various rail beam and section mills; a core adopts high-toughness graphitic steel when the outer layer obtains high wearing resistance; and reasonable casting parameter matching is designed to guarantee the good combination of cold working die steel and the core. Compared with products produced by the prior forging method, the technology has equivalent application effect and low manufacturing cost, and the performance-price ratio is far higher than that of the forging production method. The technology realizes the casting which substitutes the forging, and satisfies the development direction of the industry.

The invention relates to the field of wireless communication, and discloses a method and a device for switching between a macro cell and a private cell, wherein the switching method comprises the following steps that: a macro network acquires information of a private network; according to the information, the macro network configures measurement control information of a terminal; and according to the measurement control information, the switching from the macro network to the private network is executed. The method and the device can realize that when the UE outside the private cell returns to the covering range of the private cell, that the UE can be quickly switched to the private cell so as to enjoy better service and that the higher performance-price ratio brought by the private cell.

The invention relates to masonry mortar special for self-insulation walls, which is a powdery mixture and consists of the components with the following weight portions of 52-68 portions of cementing materials, 20-36 portions of gradation aggregates, 12-25 portions of vitrified hollow micro-pearl, 0.2-0.26 portions of redispersibility emulsion, 3-12 portions of thickener rheology agent, 0.05-0.3 portions of water retaining agent, 0.05-0.3 portions of anti-fissure strengthening agent and 0.012-0.035 portions of anti-entraining agent. The invention has the advantages of good water retention, lowheat conductivity, high mechanical strength, good flexible crack resistance, good waterproof performance, good dry shrinkage resistance, good fireproof performance, easy construction, high performance-price ratio, energy saving performance, etc.

The invention relates to a preparation method for lubricating oil of graphene loaded nanometer oxides, and belongs to the technical field of lubricating oil. The preparation method adopts the technical scheme that a graphene oxide solution is subjected to low-speed separation, and supernatant liquid is taken for use; the supernatant liquid and nanometer oxides are mixed and are subjected to freeze drying to obtain fluffy few-layer graphene oxide and nanometer oxide composite powder; the composite powder is heated in a vacuum state until the constant drying condition is reached, the composite powder in the constant drying condition and base oil are blended to be put in a sealed reaction kettle for heating treatment, and after the filtering or centrifugal separation, the repeated washing is carried out for 3 to 5 times to obtain an oleophylic graphene nanometer oxide compound; the oleophylic graphene nanometer oxide compound is uniformly mixed with composite additives and the base oil to obtain the lubricating oil of the graphene loaded nanometer oxides. The preparation method has the advantages that the process is simple; the performance price ratio is high; all ingredients have excellent dispersibility and stability. The prepared lubricating oil has good lubricating performance and high carrying capacity, and the beneficial influence can be generated on the lubricating oil in the aspects of viscosity-temperature characteristics, heat conduction effect and the like.

The invention provides a swing laser radar-based indoor three-dimension point cloud map generation system. The system includes a three-dimension point cloud data acquisition module and a data processing module; the three-dimension point cloud data acquisition module comprises a laser radar and a swing implementing mechanism, wherein the laser radar is used for acquiring point cloud data of the surrounding environment of a mobile platform, and the swing implementing mechanism is used for carrying the laser radar, driving the laser radar to swing in a reciprocating manner and sending swing angle data to the data processing module; and the data processing module, adopted as a point cloud data processing and storage device, controls the start/stop state of the three-dimensional point cloud acquisition module, merges the scanning data of the laser radar and the swing angle data so as to generate indoor three-dimension point cloud data, splices the indoor three-dimension point cloud data to generate an indoor three-dimension point cloud map, and stores the indoor three-dimension point cloud map. The swing laser radar-based indoor three-dimension point cloud map generation system of the invention has the advantages of structural simplicity, easiness in implementation, high performance-to-price ratio as well as high density and high precision of generated point cloud map data. The generated three-dimensional point cloud map can be directly applied to various application situations of indoor navigation and positioning.

The invention relates to a process for recovering sulfuric acid and sulfate from waste acid generated in the preparation of titanium dioxide by using a sulfuric acid method, belonging to the technical field of waste acid treatment in the industrial production. The invention recovers sulfuric acid and sulfate products from waste acid generated in the production process for preparing the titanium dioxide by using the sulfuric acid method through the sedimentation pretreatment and the simple process including the first segment of flash evaporation-crystallization, concentration and separation, the second segment of vacuum evaporation, concentration and separation and the third segment of vacuum evaporation, concentration and separation. The invention has simple process, convenience of operation, simple equipment, high performance price ratio and high yield, high concentration and less impurities of the product acid, can recycle resources without waste liquid or waste residue emission and can be favorable to environmental protection and energy saving, and emitted exhaust mainly contains air and less vapor, is non-toxic to the environment and can effectively overcome the difficulties of fouling and clogging of the equipment. The invention can be widely applied to the recovery of waste acid in the industrial production and be particularly suitable for recovering the waste acid generated in the preparation of titanium dioxide by using the sulfuric acid method.

The invention discloses a basalt continuous fiber reinforced resin composite material and a relative production method, which uses basalt continuous fiber as reinforce material, uses the chemical material containing the silane compounds as coupling agent, and uses unsaturated polyester resin, phenol resin, epoxy resin, resorcinol resin, amino resin and vinyl resin, or modified unsaturated polyester resin, phenol resin, epoxy resin, resorcinol resin, amino resin and vinyl resin as substrate, to produce basalt continuous fiber reinforced resin composite material. The physical properties of the basalt continuous fiber reinforced resin composite material are better than glass fiber reinforced resin, and the hydrolysis resistance and corrosion resistance of basalt continuous fiber are better than glass fiber, with better performance price ratio than carbon fiber and Kevlar fiber. The basalt continuous fiber has better high temperature resistance, fireproof property, better combination property and low cost.

The invention discloses a super lead carbon battery with an active carbon negative electrode and a preparation method thereof. The negative electrode of the supper lead carbon battery comprises the active carbon negative electrode and a lead negative electrode which are internally parallel. A positive electrode of the battery adopts PbO2 as an active substance. A separator adopts an AGM diaphragm. Electrolyte adopts 1.0-1.4g/cm<3> sulfuric acid. By introducing the active carbon negative electrode into the lead negative electrode in parallel internally to act as the active substance, the invention can greatly promote the charge acceptance ability of the negative electrode, effectively improve the low temperature property of the super lead carbon battery, and greatly mitigate sulfation phenomenon in the negative electrode, so that the deep-cycle life can reach more than 1,800 times. Compared with cost of an inorganic system carbon-carbon symmetric mode and a nickel electrode-carbon mixed alkali system, the invention can greatly reduce the material cost of products. Compared with a traditional lead-acid battery, the invention can greatly prolong recycling lifetime of products and have obvious performance price ratio advantage.

The invention discloses heat conduction flame retardant liquid silica gel, which comprises components with the following parts by weight: 10 to 40 parts of vinyl end organopolysiloxane with 500 to 5000 mPa.s polymeric viscosity in 25 DEG C, 10 to 40 parts of vinyl end organopolysiloxane with 10000 to 50000 mPa.s in 25 DEG C, and 1 to 5 parts of hydrogen-containing polymethylsiloxane, 2 to 8 parts of alkyl disilazane, 20 to 50 parts of surface hydrophobicity Al2O3 powder with average particle diameter of 5 to 20 microns, 10 to 50 parts of Al(OH)3 powder with average particle diameter of 5 to 20 microns, 0.3 to 2 parts of addition solidification catalyst, 0.01 to 0.06 part of alkynol depressant and 0.5 to 2 parts of distilled water, wherein, R is methyl, ethyl, propyl or butyl. The invention is prepared by the way of addition type heat vulcanization, toxic substance or irritant gas is not produced in the production process, the vulcanization rate is quick, and the energy saving, the consumption decreasing and the environmental protection requirements are conformed. The storage stability of the product is good, the viscosity is moderate, the operability is good, the product integrates the heat conduction, insulation and flame retardant performances into a whole, and the performance-price ratio is high.

The invention provides a nanometer heat-insulating outer wall coating and a preparation method thereof. The nanometer heat-insulating outer wall coating comprises the following components in parts by weight: 5-10 parts of deionized water, 1-2 parts of ethylene glycol, 3-5 parts of fibers, 3-5 parts of diatomite, 30-40 parts of acrylic emulsions, 15-25 parts of glass microballoons, 20-40 parts of 20% silicon dioxide aerogel water-based slurry and 1.4-2.9 parts of auxiliary agents. The nanometer heat-insulating outer wall coating provided by the invention is prepared by matching multiple auxiliary agents by taking the self-crosslinking acrylic emulsions as film-forming materials and SiO2 aerogels, hollow glass microspheres and aluminum silicate chopped fibers as fillers. The coating achieves the heat insulation by adopting nanopores, and has the advantages of thin construction layer, good safety property and fire resistance, environmental friendliness, energy conservation, high performance-price ratio and the like.

The invention discloses a super-long distance phase-sensitive optical time domain reflectometer (Phi-OTDR) system, which comprises a Phi-OTDR demodulating system and detecting optical fiber, wherein a forward amplifying unit and a backward amplifying unit are respectively arranged at the front end and the back end of the detecting optical fiber. Detecting signal light of the Phi-OTDR system is amplified in a distributed manner by utilizing a bidirectional second-order or bidirectional multi-order Raman amplifying method, so that the uniformity of the intensity and the distribution of Rayleigh scattering signals on the whole optical fiber is further improved, the problem of the prior amplifying method of the Phi-OTDR system is effectively overcome, and the sensing distance of a single segment of detecting optical fiber of the Phi-OTDR system is further prolonged; and meanwhile, by utilizing bidirectional Raman amplifying multi-segment cascade connection, the super-long distance Phi-OTDR system which requires a low cost and has high performance can be realized. The method of the super-long distance Phi-OTDR system is helpful to improvements on the whole performance and the performance price ratio of the Phi-OTDR system during the application to long-distance safety monitoring of oil and gas transmitting pipelines, large-range peripheries, large-scale civil engineering structures, and the like.

The invention discloses a method for preparing fluorine-containing acrylate emulsion. The fluorine-containing acrylate emulsion is prepared from perfluoroalkyl ethyl acrylate and acrylic monomers which are used as main materials, persulfate which is used as the initiator, and a compound emulsifier by adopting the semi-continuous titration polymerization process. The titration mode is adopted in the whole reaction process, the heat is preserved after finishing titrating, the reaction process is convenient to control, and the finally prepared fluorine-containing acrylate emulsion has excellent performance and high performance-price ratio, is environmental friendly and safe and can be cured at normal temperature to form a film. The detection on the emulsion paint prepared from the fluorine-containing acrylate emulsion shows that the emulsion paint can resist scrubbing of 10,000 times without changing, can resist both acid and base for 120 hours without blistering and powder falling in addition to slight loss of gloss and color and can resist ageing for 5,000 hours without blistering, stripping and cracking. The content of solid (the mass percent of non-volatile matters) in the fluorine-containing acrylate emulsion is more than 45%, and the water repellent angle of the coating of the fluorine-containing acrylate emulsion is more than 100 degrees.

The invention provides a powder metallurgic process, which comprises the following steps of: pressing, sintering, soaking in oil, finishing and treating with steaming. In the process steps, iron-based powders are uniformly mixed according to a ratio and are transmitted to a presser; the presser transmits the iron-based powders into a preset product mold and presses to obtain a rough product; the rough product is arranged in a conveying mesh belt, which conveys the rough product to a sintering furnace according to a set speed; air is used for repeated extraction and pressurization in the sintering process, and the temperature of the sintering furnace is adjusted to sinter the rough product to a semi-product; the semi-product is cooled and soaked in engine oil and is subjected to fine correction in a sizing die; the corrected semi-product is subjected to steam treatment to form a rustproof layer and to deburring treatment by shot blasting, vibration and manual deburring. The product has high performance-price ratio, and a dense protection film is formed on the product surface to improve the rustproof performance.

The invention relates to a fast pyrolytic test device, which consists of a tubular electric heating furnace (6), an object carrying frame (11), a temperature test and control opening (8), a reaction tube (4), an air inlet opening (1) and an oil air outlet opening (9). The invention is characterized in that the air inlet opening (1) is arranged at the upper part of the reaction tube (4), the top of the reaction tube (4) is provided with an adjustable sealing element (3), a stainless steel rod (5) is arranged in the reaction tube (4), the top end of the stainless steel rod (5) is connected with the adjustable sealing element (3), the lower end of the stainless steel rod (5) is connected with a sample hanging basket (7), the middle lower part of the reaction tube (4) is positioned inside the tubular electric heating furnace (6), the bottom of the reaction tube (4) is provided with the temperature test and control opening (8) and the conical oil air outlet opening (9), the conical oil air outlet opening (9) is connected with an oil air outlet tube (12), and the tubular electric heating furnace (6) is positioned on the object carrying frame (11). The invention has the advantages of high performance price ratio, simple and convenient operation, simple structure and low equipment cost, can realize slow temperature rise and fast pyrolysis under the condition of simulated work conditions, can realize fast cooling, and can accurately measure the tar amount generated by the pyrolysis.

The invention discloses a toughening flame-retardant reinforcing polybutylene terephthalate compound and a relative production method, while the compound is prepared from PBT, glass fiber, bromide, antimony oxide, toughening agent, anti-oxidant and anti-drop agent. The production method comprises weighting materials according to a certain ratio, mixing the PBT, bromide, antimony oxide, toughening agent, anti-oxidant and anti-drop agent at a certain mass ratio in a high-speed mixer uniformly, arranging the uniform mixture in bucket, using a feeder to feed the mixture into a twin-screw extruder, to obtain flame-retardant reinforcing PBT compound with good toughness. The bromines reinforcing flame retardant PBT compound has good toughness and performance price ratio, with simple preparation and low cost.

The invention provides a cold-working die steel material, which comprises the following trace elements in percentage by weight: 0.95 to 1.05 percent of C, 0.35 to 0.45 percent of Mn, 0.55 to 0.65 percent of Si, 7.55 to 8.5 percent of Cr, 0.45 to 0.55 percent of Mo, 0.35 to 0.45 percent of V, less than or equal to 0.025 percent of S, and less than or equal to 0.025 percent of P. The cold-working die steel material has simple technical process and easily-controlled operation, adopts alloying and modification treatment, has good hardenability, stable temper resistance, higher wear resistance and good processability, can improve work efficiency, reduce production cost, reduce or avoid moulds from breaking and cracking, and has long service life, high performance-price ratio and wide application.