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4869results about How to "Solve processing problems" patented technology

Construction equipment Internet of Things system and method based on blockchain technology

The invention discloses a construction equipment Internet of Things system and method based on the blockchain technology. The system comprises a plurality of Internet of Things nodes, a plurality of blockchain nodes, a plurality of intelligent terminals and a plurality of user terminals, the detection of various environmental information in the building and the monitoring of electrical equipment can be achieved, data are stored in the blockchain nodes in a distributed manner, a data transmission process is encrypted by using the asymmetric encryption technology, and data sharing is performed through a smart contract. According to the construction equipment Internet of Things system and method disclosed by the invention, the blockchain technology is combined with the Internet of Things technology, the consensus mechanism, distributed storage, asymmetric encryption and smart contract of the blockchain technology are applied to the Internet of Things, and many problems faced by the current Internet of Things are solved.
Owner:SHANDONG JIANZHU UNIV

Harmless reinjection treatment method for petroleum exploitation sludge

Relating to the technical field of harmless treatment of petroleum exploitation sludge, the invention provides a harmless reinjection treatment method for petroleum exploitation sludge. By means of a pump station composed of several hydraulic injection pumps in parallel connection, the sludge generated in petroleum exploitation is sent to an abandoned layer of an oil field. The method provided in the invention employs the hydraulic injection pumps with long stroke, low stroke frequency and high pressure to inject the sludge into the abandoned layer of the oil field, therefore, the treatment problem of oilfield exploitation sludge is solved, and simultaneously the sludge is returned to underground, thus realizing recycling of petroleum resources in the sludge, enhancing the petroleum recovery rate of the oil field, and changing the waste petroleum exploitation sludge into things of value.
Owner:DEZHOU UNITED GASOLINEEUM MACHINERY

Method for evaluating reliability of relaying protection systems under small sample failure data

The invention discloses a method for evaluating the reliability of relaying protection systems under small sample failure data, and belongs to the field of power system relay protection. The problems existing in study of the power system relay protection field at present are solved. The method includes the steps that first, failure samples of the relaying protection systems are integrated; then, a model using Weibull distribution as failure distribution is established by testing the fit goodness, a Monte Carlo method is used for sampling to expand data samples, the data samples and small sample original data are used as priori information together, and a Bayes-Monte Carlo evaluation model is established; finally, reliability evaluation is conducted on each relaying protection system by combining the Bayes-Monte Carlo evaluation model. By the adoption of the method, the limitations that the number of needed samples is large, and the accuracy of reliability parameters is low in practical application in a traditional reliability evaluation method based on large failure samples are eliminated, and reliability evaluation of the relaying protection systems under small sample failure data is effectively achieved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Spraying liquid bunch electrolysis-laser composite processing method and apparatus thereof

The invention discloses a spraying liquid beam electrolytic-laser compound manufacturing method and device, which comprises the following steps: utilizing layer generating device to produce laser beam on the working piece, manufacturing hole, seam and groove, generating high-speed spraying liquid removing material with the same shaft of laser beam through spraying liquid beam device. The device contains layer, working piece assembling chuck, power and spraying liquid beam device, wherein the spraying liquid beam device concludes assembling seat of spraying device, insulating switching seat, cathode, focal lens, protective lens, insulating sleeve and sprayer.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Method for producing fertilizer with papermaking sewage sludge

The invention discloses a method for preparing organic fertilizer from paper-making sludge. The materials such as paper-making sludge, amendment are mixed, subjected to high-temperature aerobic fermentation, post maturation and crushing, screened, and mixed with fertilizer of nitrogen, phosphorus, potassium and the like and medium and micro elements to prepare the organic fertilizer. The method has the advantages of simple process, easy operation, obvious innocuous effect, no environmental pollution and little nutrient loss; and the organic fertilizer prepared by the method is widely applied to industrial crops such as vegetables, fruit trees, Chinese herbal medicines, flowers and field crops such as wheat, corn, paddy rice.
Owner:SHOUGUANG CAILUN ZHONGKE FERTILIZER

Chinese medicine residue organic fertilizer and production method thereof

The invention provides a Chinese medicine residue organic fertilizer. Wastes after extraction of Chinese traditional medicines can be fully utilized, utilization of waste materials is realized, and a bactericidal and insect disease preventing organic fertilizer full of nutritional ingredients is also provided for agricultural production. The Chinese medicine residue organic fertilizer is prepared by fermenting Chinese medicine residue, excrement of animals, solid waste, bacillus subtilis and EM. The Chinese medicine residue organic fertilizer has the advantages that the Chinese medicine residue, excrement of animals and solid waste are mixed, biological fermentation bacteria are added for carrying out rapid fermentation, organic fertilizer is processed, waste materials are changed into things of value, harm is turned into good, the problem of treatment of abandoned herb residue produced by a Chinese medicine factory is solved, and waste treatment cost is also greatly reduced, so that a win-win situation of environmental protection and economic development is realized. By adopting the organic fertilizer made from the Chinese medicine residue, soil can be effectively improved, crop pest also can be effectively prevented, and quality, yield and safety of crops are improved.
Owner:INST OF S&T INFORMATION SHANDONG ACADEMY OFAGRI SCI

Block-free balanced-pressure clog-proof device for sewage and surface water source heat pump and system therefor

InactiveCN1920447APlay the role of auxiliary cleaning filter surfaceSolve processing problemsHeat pumpsArtificial water canalsWater sourceEngineering
The invention relates to a non-resistance pressure balance anti-resistance device of heat pump of ground water, and relative system, wherein the outer frame (1) of anti-resistance device has external water inlet (6) and external water outlet (7); the rotation filter cylinder (3) is inside the outer frame (1); the rotation filter cylinder (3) is divided into internal water inlet area (4-1) and internal water outlet area (4-2); the internal water inlet area (4-1) is connected to the internal water inlet area outlet (8) and the internal water outlet area (4-2) is connected to the internal water outlet area inlet (9). The invention has stable water pressure and stable flux, with small size and low cost.
Owner:BEIJING RUIBAOLI THERMAL TECH CO LTD

Biomass magnetic carbon material for degrading organic dye

The invention relates to a biomass magnetic carbon material for degrading organic dye. The material is prepared by mixing a biological raw material and an iron precursor at a ratio of (2-20kg):1kg. Meanwhile, the invention also discloses a preparation method of the biomass magnetic carbon material. The biomass magnetic carbon material provided by the invention is cheap and efficient and has double effects of adsorption catalysis and degradation; serving as an efficient catalyst in a process of constructing a Fenton-like system for treating high-concentration wastewater, the biomass magnetic carbon material has high catalytic activity in thoroughly oxidizing and degrading organic dye; the degradation effect is better than that of a ferrous ion homogeneous catalysis reaction and a Fenton-like reaction taking ferroferric oxide as a catalyst.
Owner:LANZHOU UNIVERSITY

Construction method of shallow buried underground excavating tunnel super large section using PBA method

ActiveCN101225742ASolve comprehensive technical problemsSolve processing problemsUnderground chambersTunnel liningShotcreteTerrain
The invention relates to a method of shallow embedment and concealed excavation based on the PBA method for construction on super large cross-section of tunnel, comprising the following steps: 1. to detect the geologic cavity over the wide span tunnel structure; 2. to arrange the ground dewatering well and the tunnel horizontal well; 3. to take the horizontal channels of vertical well as the front large pipe shed on the arch part of the main body and to inject for strengthening the terrain formation; 4. to carry out the supporting arch construction on the side span of small pilot tunnel and the supporting major arch construction on the main body; 5. to excavate the soil mass of lower cross section as the extended foundation and the central partition wall; 6. to remove the bottom central partition wall section by section, construct bottom underlayer and waterproof layer, pour the reinforced concrete; 7. to remove the central partition wall of the upper part section by section and temporary steel shotcrete in the small pilot tunnel, construct the waterproof layer and concrete of the side wall and the main arch. The method of shallow embedment and concealed excavation based on the PBA method for construction on super large cross-section of tunnel has the advantages of guaranteeing the safety, quality and time limit of the construction, saving cost and enhancing work efficiency.
Owner:CHINA RAILWAY 18TH BUREAU GRP CO LTD

Carbon nano-tube enhanced cement-base composite material and preparation method thereof

InactiveCN101239800AResolve aggregationSolve the problem of tanglesSolid waste managementCarbon nanotubeMetal fibers
The present invention provides a carbon nano-tube reinforcing cement-based composite material and the preparing method thereof, which relates to an inorganic non-metal fiber-reinforced cement-based composite material and the preparing method thereof. The invention settles the problem that the carbon nano-tube is hard to uniformly dispersed in the cement substrate, and the carbon nano-tube reinforcing cement-based composite material of the invention is mainly composed of carbon nano-tube, dispersing agent, thickening stabilizing agent, cement blending material, superplasticiser, antifoaming agent and cement; the method of the invention comprises the following steps: slowly injecting the continuous phase mixed liquid of the thickening stabilizing agent into the carbon nano-tube disperse phase mixed liquid; adding the cement mixing material, mixing to uniform, heating and ultrasonic agitating, then vacuum discharging the bubble; then adding into the mixed liquid of the superplasticiser and the water for mixing to uniform, further eliminating the bubble with the antifoam agent; at last adding cement for mixing to uniform, adding the slurry into the oil mould and jolt ramming for molding; mode removing and standard maintaining to the prescribed lifetime. The carbon nano-tube in the product prepared by the method of the invention is uniformly dispersed in the cement substrate. The mechanical property and conductivity of the product is increased for several times.
Owner:HARBIN INST OF TECH

Oxidized graphene insulating heat-radiating coating and preparation method thereof

ActiveCN105086688ABoth insulation propertiesBoth heat dissipation characteristicsRosin coatingsPolyurea/polyurethane coatingsPhosphide compoundThermal conductivity
The invention discloses an oxidized graphene insulating heat-radiating coating. The oxidized graphene insulating heat-radiating coating is characterized by being composed of, by weight, 300-30 parts of resin, 1 part of oxidized graphene and 100-10 parts of resin curing agent, and the oxidized graphene is synthesized by adopting an improved Hummers method or phosphorylated oxidized graphene modified by phosphide. The oxidized graphene insulating heat-radiating coating is prepared by mixing oxidized graphene dispersion liquid or phosphorylated oxidized graphene dispersion liquid prepared after dispersing oxidized graphene in a dispersion liquid solvent with resin and resin curing agent. By the oxidized graphene insulating heat-radiating coating, the problem that insulativity and thermal conductivity of existing materials are difficult to realize at the same time is solved.
Owner:山东利特纳米新材料有限公司

Picosecond pulse laser cutting preparation method for grid-control traveling wave tube grid mesh

The invention discloses a picosecond pulse laser cutting preparation method for a grid-control traveling wave tube grid mesh. The method comprises the following steps of performing cleaning, hydrogen burning and annealing on a grid mesh material, then pressing the grid mesh material through a die on a punching machine to form a spherical grid mesh blank with high curvature radius precision, performing destressing hydrogen burning on the blank to eliminate stress during processing to guarantee the stability of the curvature radius of a spherical cap of a grid mesh, and finally cutting the grid mesh by adopting picosecond pulse laser of an optimized technology to prepare the grid-control traveling wave tube grid mesh with high size precision and high consistency. According to the preparation method for the grid mesh of a grid-control traveling wave tube, specific technical parameters of picosecond laser cutting are screened through a large number of experiments, the operability is high, the technical design is reasonable, and the application range is large; the prepared grid mesh is high in size precision, high in consistency, high in yield and high in reliability and has an important application value; the shortcoming of an existing electric spark grid mesh processing technology can be effectively overcome.
Owner:NANJING SANLE GROUP

Surface treating method for magnesium lithium alloy

The invention provides a method for processing the surface of magnesium-lithium alloy. The technique of micro-arc oxidation is successfully applied to processing the surface of the magnesium-lithium alloy. Direct current / DC pulse / alternating current pulse multiplex power supply is used and the magnesium-lithium alloy with different lithium contents in a compound electrolyte system of sodium polyphosphate, sodium silicate, calgon and sodium hydroxide is carried out by micro-arc oxidation for 2-120min. A ceramic oxide film of 10-100Mum with a rigidity higher than 200Hv is formed in situ on the surface of the magnesium-lithium alloy, thus remarkably improving corrosion resistant property compared with an alloy matrix, solving the problem known at home and abroad concerning processing the surface of the magnesium-lithium alloy and broadening the application in the fields of aviation, aerospace, car, electronic, etc.
Owner:HARBIN ENG UNIV

Multi-head numerical control drilling machine

The invention discloses a multi-head numerical control drilling machine, which comprises a base, a tool changing mechanism, a drill bit mechanism and a feeding mechanism, wherein the base is provided with a workbench, an upright post is fixedly arranged on the base, and the top of the upright post is provided with the tool changing mechanism; a supporting frame is fixedly arranged on the base; the drill bit mechanism is arranged on the supporting frame, the drill bit mechanism is connected with the feeding mechanism, and the feeding mechanism drives a main shaft sleeve of the drill bit mechanism to move along the vertical direction so that a pneumatic clamp arranged on the main shaft sleeve can move along the vertical direction; and the control ends of the tool changing mechanism, the drill bit mechanism and the feeding mechanism are connected with the signal output end of a numerical control system. The tool changing mechanism, the drill bit mechanism and the feeding mechanism are mutually independent, so the drilling machine has clear and compact structure and is easy to maintain; and the mechanisms are controlled uniformly by the numerical control system so as to increase the operation flexibility, improve the production efficiency and reduce the cost. The drilling machine can be widely applied in the machining field.
Owner:林颖

Vehicle and vehicle hill starting control method and hill starting control apparatus

The invention discloses a vehicle and a vehicle hill starting control method and a hill starting control apparatus, wherein the method comprises: acquiring vehicle speed, an accelerator opening degree, engine rotation speed, clutch shaft speed, road slope and clutch output torque; calculating vehicle acceleration torque and vehicle resistance torque based on the clutch output torque, the road slope and the clutch shaft speed; calculating the target vehicle speed based on the road slope and the accelerator opening degree; calculating the target acceleration torque of a vehicle based on the difference value between the calculated target vehicle speed and the vehicle speed, the road slope and the accelerator opening degree; calculating the torque that an engine needs and the clutch target torque based on the target acceleration torque of the vehicle, the vehicle resistance torque and the engine rotation speed; and controlling the engine output torque to reach the torque that the engine needs and the clutch output torque reach the clutch target acceleration torque so as to make the vehicle speed reach the target vehicle speed and the vehicle acceleration torque reach the target acceleration torque of the vehicle, thus controlling the vehicle speed and the vehicle acceleration speed and rapidly realizing the intention of a driver.
Owner:BYD CO LTD

Method for cultivating earthworm by cattle manure and corps stalks

The invention discloses a method for raising earthworm by taking advantage of dairy manure and straws and stalks of crop, which applies fresh dairy manure and straws and stalks of crop to raise earthworm. The invention adopts fresh dairy manure and straws and stalks of crop as raw materials, which can not only solve the treatment problem of dairy manure in large-scale cattle farms and reduce environment pollution, but also obtain earthworm with high economic value as well as odourless, clean and natural organic manure with high quality, thus realizing the regeneration and utilization of dairy manure, reducing treatment cost for dairy manure on cattle farms, and greatly improving economic benefits of enterprises.
Owner:GUIZHOU JILONG ECOLOGICAL TECH

Underwater multi-beam sounding system and method

InactiveCN101852854ASolve processing problemsCombating Frequency Selective FadingAcoustic wave reradiationEnvironmental noiseBeam angle
The invention discloses an underwater multi-beam sounding system and a detecting method thereof. The system comprises a microcomputer control system, and a sound wave emission system and a sound wave receiving and detecting system which are connected with the microcomputer control system. The sound wave emission system is provided with a plurality of single emission units, and each single emission unit comprises a plurality of transmitting transducers with different resonance frequencies. The invention also relates to an underwater multi-beam sounding method according to the system. Through two unique modes of 'frequency sweeping and frequency selecting' and 'frequency hopping and sounding', the sounding range resolution is improved by reducing the frequency hopping residence time, the sounding range is increased by increasing the frequency point number of the frequency hopping, and the problem of the contradiction between the range resolution and the sounding range in the single-frequency pulse sounding. The sounding system and the underwater multi-beam sounding method can effectively resist underwater acoustic channel frequency selectivity fading and complex environmental noise, can accurately estimate the first echo reaching time under each wave beam angle, and improve the underwater multi-beam sounding accuracy.
Owner:SOUTH CHINA UNIV OF TECH

Method for circulating and reutilizing sludge during process of sewage

Treatment of refused pollutant is carried out by EC treating for sludge in sewage treatment plant, removing heavy metal, pesticides and antibiotics residues, entering into sludge dewatering apparatus to dewater, delivering dewatered sludge to air-drying farm to air dry, adding into additives to adjust N, P and K proportion in sludge, entering dried sludge into composting chamber to compost, transferring air to composing chamber, spraying water while timing agitating, adding into EM, fermenting, delivering manure mixture to livestock farm and feeding by earthworm. Earthworm's excrement can be used as biological organic fertilizer. It's cheap and economical.
Owner:上海荣禄投资管理有限公司 +1

Heavy metal-contaminated soil solidifying agent and application method thereof

The invention discloses a heavy metal-contaminated soil solidifying agent and an application method thereof. The solidifying agent comprises the following components by mass: on the basis of the dry weight of heavy metal-contaminated soil, 10 to 15% of a binding material, 5% of biochar, 10% of vegetable fiber and 1% of a stabilizing agent. The components are added according a sequence of the stabilizing agent-the biochar-the vegetable fiber-the binding material. Addition of the chemical stabilizing agent and the biochar in the process of stabilization enables heavy metals to be absorbed and passivated and to lose mobility; preparation of heavy metal-contaminated soil slurry provides conditions for a later chemical reaction; the whole processing process is free of dust pollution and discharging of unwanted sewage. Addition of the vegetable fiber enables cracking of heavy metal-contaminated soil solidified by using a conventional solidifying agent to be effectively prevented and endurance of a solidified body to be improved. The method provided by the invention has the advantages of strong operability, low cost, extensive applicability, a high resource utilization rate, low environmental risk and easy large-scale popularization.
Owner:INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI

Apparatus for treating sewage containing oil, and processing technique

This invention discloses apparatus and process for treating oil-containing wastewater. The apparatus is composed of an electric flocculation tank, an electric floatation tank, an ozone- and ultrasonic-enhanced oxidation device, and a reaction tank. Electric flocculation and electric floatation are adopted to remove oil and suspended substances. Ozone- and ultrasonic-enhanced oxidation is adopted to remove COD by degrading organic matters. The process has such advantages as stable operation, no need for chemical reagents, small floor area, and high automation. Treated oil-containing wastewater is qualified for discharge.
Owner:UNIV OF SCI & TECH BEIJING

Method of preparing novel silver tin oxide silk electrical contact material

InactiveCN101202169AGranularity is easy to controlImprove surface activityContactsIntermediate frequencyElectric properties
The invention relates to a novel preparing method of a material used for a silver tin oxide wire electric contact. The invention has a process that the material prepared by silver, tin and additives according to a certain proportion is put into an intermediate frequency smelter for melting; a high pressure water atomizing device is adopted for high pressure alloy atomization; atomized alloy powder is dried and oxidated for modification; an isostatic pressing ingot is formed after isostatic pressing treatment; the ingot is agglomerated in a heating furnace; the agglomerated ingot is delivered into an extruding machine to extrude wires; the extruded wire is pulled and annealed to get a finished wire. The material property and electric property of the silver tin oxide wire electric contact material manufactured by the method can satisfy the use condition with high requirement.
Owner:FUDA ALLOY MATERIALS

Tobacco powder biological organic fertilizer formula and production method thereof

The invention relates to the organic fertilizer field, in particular to tobacco powder biological organic fertilizer formula and production method thereof. The invention is characterized in that the formula includes the following components by parts by weight: 5-6 parts of tobacco powder, 0.5-1.5 parts of brown coal, 1.5-2.5 parts of live stock excrement and 1-2 parts of straw powder. The tobacco powder biological organic fertilizer is complete in nutrient elements and can regulate soil, activate micro organism liveness in soil, overcome soil hardening and improve soil air permeability; insect pest in soil can be effectively killed; stress resistance of crop is improved, stress reaction of crop is improved, and deformity is reduced; the organic fertilizer is safe and notoxic to human, live stock and environment; the organic fertilizer uses tobacco powder of cigarette factory and redrying factory and straw powder as main raw materials, solves the problems that tobacco powder of the cigarette factory and redrying factory is difficult to treat and secondary pollution is caused by direct burning of the tobacco powder and straw and is environmentally friendly.
Owner:云南澄江立杉生物工程有限公司

Oil seal spring full-automatic sorting system and method based on image detection method

The invention belongs to the image test technology and image processing technical field and relates to an oil seal spring full-automatic sorting system. The system comprises a glass turntable, a collecting and processing component and a sorting component, wherein the collecting and processing component contains a camera with a zoom lens, an LED backlight and a computer; the camera is used to collect the image of an oil seal spring to be detected in a collection area and send the image to the computer; the computer processes and analyzes the collected image of the oil seal spring to obtain the characteristic quantity data and detect judgment of the spring, generate a product sorting signal according to the characteristic quantity data and the detect judgment, and send the sorting signal to the PLC controller; the sorting component comprises the PLC controller, a sub-quality product picking mechanism, a sub-quality product container and the like; and the picking mechanism picks the sub-quality products in a picking area under the control of the PLC controller. The invention also provides a sorting method using the sorting system. The system and method of the invention are simple and efficient, thus the characteristic detection and defect evaluation of the oil seal spring are easy to realize.
Owner:TIANJIN UNIV

Method and apparatus for treating and recycling carbonized wastewater

The invention relates to a coking waste water treatment reuse method and a device thereof. The method comprises the following process steps: 1. strengthening pretreatment; 2. biological treatment; and 3. reuse water treatment. The structure of the method is as follows: electrochemical equipment at the strengthening pretreatment step is connected with a water outlet of an air float and a water inlet of biological treatment; and a water outlet pipe of an MBR water outlet tank at the biological and sludge treatment step is connected in serial with an ozone contact tower, an active carbon filter tower and an RO at the reuse water treatment step. The method has the advantages of providing a novel combination process for the coking waste water, effectively combining the technologies of de-oiling, biochemistry, electrochemistry and membrane, improving the biodegradability of difficultly degraded pollutants by utilizing the electrochemical strengthening pretreatment, strengthening the biochemical treatment by MBR, reasonably designing the reuse treatment of ozone-active carbon-RO, solving the problem of the difficult treatment of coking waste water and achieving the aim of the reuse of the coking waste water.
Owner:上海缘脉环境科技有限公司

Pervious concrete of recycled aggregate and preparation method thereof

The invention discloses pervious concrete of recycled aggregate and a preparation method thereof, and belongs to the technical field of pervious concrete of recycled aggregate. The pervious concrete of the recycled aggregate comprises the following components by mass percent: 71.77-73.16% of coarse aggregate, 18.88-19.04% of cement, 6.58-8.14% of water and 1.21-1.22% of silica fume, wherein the recycled aggregate and the natural aggregate accord with the stone utilization standard II, the mixing amount of the recycled aggregate can be customized according to the actual performance index, the cement is 42.5-level ordinary portland cement, and the mixing amount of the silica fume is 6% of the dosage of a binding material. The preparation method comprises the following steps: agitating, vibrating, molding and floating. The mix proportion is designed by adopting a volume process, and the concrete is prepared according to the scheduled preparation process. By adopting the pervious concrete of the recycled aggregate, on the one hand, the problem of recycling of the waste concrete can be solved, on the other hand, underground water can be effectively supplied, collected and purified, and water resources are repeatedly utilized, so as to relieve the 'heat island effect'.
Owner:YANGZHOU UNIV

Process of treating oil-bearing sewage for ternary combination flooding in oil field

The present invention discloses process of treating oil-bearing sewage for ternary combination flooding in oil field. The process includes the following steps: 1. gravitational settling of the sewage; 2. combined cyclonic and air floating treatment for oil-water separation; 3. regulating pH value of sewage and adding inorganic flocculant and organic flocculant; 4. further settling; and 5. filtering in a double filter material filter and a modified fiber ball filter. The process can treat sewage to reach the requirement for using as recirculated polymer flooding water with oil content not more than 30 mg / 1, suspended matter content not more than 30 mg / 1 and granularity midvalue not greater than 5 micron.
Owner:大庆德美特尔能源科技有限公司

A single-ended traveling wave fault location method for transmission lines

The invention relates to a single-end fault ranging method based on initial reversed-polarity directional traveling wave detection, which can effectively realize single-end traveling wave fault ranging and has high reliability and high accuracy. The method comprises the following steps: (1) when a traveling wave fault ranging device is started, testing the arriving time t1 of the line modular component of the initial traveling wave of a fault, and extracting traveling wave signals in the time interval [0, 2L / v], wherein L indicates the length of the line, and v indicates the wave speed of theline module component; (2) testing the initial reversed-polarity directional traveling wave in the time interval, calculating the difference of the arriving time of the line modular component of the initial reversed-polarity directional traveling wave and the arriving time of the line modular component of the initial traveling wave of the fault, determining whether the fault is a nearby fault or a remote fault with reference to Curve Chart 3, and accordingly determining the section with the fault point; (3) judging the properties of the second arriving wave head through the determined fault section; and (4) determining final ranging results through the initial traveling wave and the wave head of the second traveling wave of the fault.
Owner:SHANDONG UNIV

Method for producing compost

The invention relates to a process for producing organic fertilizers, in particular to a process for producing composts by employing the method of compost fermentation, wherein the process comprises: selecting filthy mud as main fermenting raw materials, adding a conditioner in the filthy mud to adjust the carbon nitrogen ratio between 15 and 30, then adding catalytic bacteria, finally performing compost fermentation, wherein the conditioner is capable of employing castoffs as animal wastes, sawdust, wooden meals, traditional Chinese medicine dregs, straws, leave and the like and the castoffs have rich organic contents. The nutrition composition of organic base material which are fermented is more reasonable via controlling carbon nitrogen ratio in the invention, and the invention uses filthy mud which urgently needs to be handled to replace the conventional night soils and straws to be main raw materials of the composts, changes waste into valuable, and has certain effect for improving urban environment.
Owner:HANGZHOU NORMAL UNIVERSITY

Automatic soldering machine

The invention discloses an automatic soldering machine which comprises a machine body, a soldering flux spraying device, a preheating device, a soldering furnace assembly, a cooling device and a control assembly. The soldering flux spraying device is mounted in the machine body, the control assembly is mounted at one end of the machine body, and the soldering flux spraying device, the preheating device, the soldering furnace assembly and the cooling device sequentially match with each other. The automatic soldering machine is reasonable in design, can be widely applied to soldering operation of various circuit boards of electronic products, and has a huge market potential and a practical social significance, and various long-term problems of traditional soldering equipment are solved.
Owner:DONGGUAN BABU ELECTRONICS TECH
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