188results about How to "Solve density" patented technology

The invention discloses an air and water hybrid cooling high-speed permanent-magnet motor and belongs to the technical field of motors. The large-power high-speed permanent-magnet motor comprises a casing, a cooling water jacket, a stator core, a stator radial air duct, a stator inner air duct, a motor rotor, an outer rotor axial fan, an outer rotor fan fixing frame and two sliding bearings. The stator core is divided into two sections, the radial air duct is reserved in the middle, and the inner air duct is reserved in a stator slot close to the air gap position. The cooling water jacket is arranged outside the stator casing, a spiral water way is arranged in the water jacket, and water flows into the water way from the middle of the water way and flows out from a left spiral water outlet and a right spiral water outlet which are arranged at two ends of the water way. The air and water hybrid cooling high-speed permanent-magnet motor can mechanically solve the problem that a permanent magnet is broken when bearing large pulling stress during high-speed rotating, further solves the problems that the large-power high-speed motor is large in loss density, difficult in heat dissipation and over high in temperature rising, and prevents the permanent magnet from having irreversible demagnetization easily at high temperature.

The invention discloses a method for designing a water-spraying boost pump hydraulic model for an efficient and large-power-density ship. The method comprises the following steps that type selection design of water-spraying boost pump hydraulic parameters is conducted, two-dimensional axial face projective geometry is determined, three-dimensional geometrical shapes of an impeller and guide blades are obtained according to a parameterized ternary reversal design method, a three-dimensional geometrical shape of a shrinkage nozzle is obtained through circumferential rotation, the three-dimensional geometrical shapes of the impeller, the guide blades and the shrinkage nozzle are combined to obtain the water-spraying boost pump hydraulic model. The method has the outstanding advantages that the design period is short, the design quality is high, and the water-spraying boost pump hydraulic model which has the advantages of being high in efficiency, compact and large in power density can be rapidly and reliably designed. The geometrical shapes of the impeller and the blades are obtained according to the parameterized ternary reversal design method, so that on the condition that the water-spraying boost pump hydraulic model is kept compact, the efficiency is improved, cavitation is restrained, and the power density is increased in the researching and developing process of a high-speed ship water-spraying boost pump.

The invention relates to a high-density tungsten alloy containing rare earth oxide for an armor-piercing bullet core. The alloy comprises the following components in parts by weight: 90-95 parts of tungsten, 0.05-2.0 parts of lanthanum oxide or cerium oxide, 4.95-9.95 parts of binder phase nickel and ferrum. The invention also relates to a preparation method of the high-density tungsten alloy, and the method comprises the following steps: evenly mixing and reducing tungsten oxide and rare earth oxide to obtain compound tungsten powder; then mixing the compound tungsten powder with the binder phase; and successively carrying out pressing, sintering, argon heat treatment, working hardening, prestraining aging heat treatment and the like on the mixed material. Through the reasonable component proportion and preparation method, the high-density tungsten alloy material disclosed by the invention has the advantages of excellent comprehensive mechanical property, such as high strength and high plasticity, and stable performance, thereby providing a wide application prospect for developing and designing new types of armor-piercing bullet with new functions.

The invention relates to a multi-layer sealed case having a plurality of hollow tapered cooling channels. An antenna cover, a rear cover plate, a left cover plate and a right cover plate, and an upper cover plate and a lower cover plate are sealed at an outermost layer of a transmitting-receiving case; an outer layer cavity structure reserved by the transmitting-receiving case structure forms a third-layer sealing cavity; a left inner air-duct sealing plate and a right inner air-duct sealing plate are installed at left and right inner air-duct cavity mounting end surfaces reserved at the transmitting-receiving case structure to form first layer sealing cavities; and the transmitting-receiving case structure is sealed by the rear cover plate to form a second layer cavity for installing all sub systems. The first layer sealed cavities are hollow cooling channels are distributed in a left-right symmetric mode by inner air-duct tapered left fins and inner air-duct tapered right fins; and unique hollow tapered air ducts are formed at the height and length directions of the cooling fins. All sub systems inside the transmitting-receiving case are attached to external surfaces of a left inner air duct and a right inner air duct by heat-conduction pads; heat of all sub systems is transmitted to inner surface cooling fins of the left inner air duct and the right inner air duct with low thermal resistance; and then the heat is taken away by forced convection of a motor.

The invention belongs to the technical field of aerogel materials, and particularly relates to a preparation method for a crosslinking type polyimide aerogel. The adopted sol-gel method comprises the steps that acid anhydride and diamine containing a plurality of benzene ring structures are adopted as a precursor body to prepare polyamide acid, then a crosslinking agent is added to form a crosslinking type polyamide acid structure, imidization is performed to form wet gel, and the supercritical drying technology is combined with the wet gel to obtain the crosslinking type polyimide aerogel material with the low mass, high specific surface area and good heat stability. Compared with the prior art, the preparation method has the advantages that raw materials are easy to obtain, the reaction process is simple, the obtained material is of the nanometer level three-dimensional net structure, the density of the material is smaller than 130 mg/cm<3>, the specific surface area can reach more than 500 mg/cm<3>, and the problems that conventional organic aerogel is high in density, low in specific area, poor in heat stability and the like are solved.

The invention relates to a float type level gauge for high-temperature high-pressure or high-temperature low-density medium, comprising a float chamber, a float and a graduated scale; the float type level gauge is characterized in that: the float is a hollow spherical shape; the float type level gauge further comprises a guide rail and a magnetic connector, a magnetic steel or a disc-shaped magnetic steel is arranged in the magnetic connector and forms magnetic attraction with a magnetic ball body in the float made of the nonferrous magnetic material or the disc-shaped magnetic steel the float made of the nonferrous magnetic material, a metal shaft laterally spanned at two side walls of the magnetic connector is exposed to two side walls and is attached to the guide rail by magnetic force, and the metal shaft can move up and down along the guide rail under the driving of the magnetic force; in addition, resistance wires are wound on the guide rail to measure the change of the resistance value of a return circuit, so as to realize continuous remote transmission of a signal. The float type level gauge for high-temperature high-pressure or high-temperature low-density medium solves the difficult problem of liquid level measurement in the high-temperature high-pressure or high-temperature low-density medium and has high measuring precision; in addition, the structure is simple, the usage is convenient, the manufacturing and maintaining cost is low and the application is wide.

The invention discloses a preparation method of a lithium ion battery cathode material, belonging to the technical field of preparation of lithium ion battery cathode materials. The lithium ion battery cathode material is a nickel manganese lithium aluminate three-component cathode material and has the chemical formula of LiNi0.5-xMn0.5-xAl2xO2, wherein x=0.01-0.075. The three components of nickel, manganese and aluminum are precipitated at the same time by using a complete coprecipitation method so that the three elements are evenly mixed on the molecular level, and the solid-phase reaction is performed on the three elements and lithium salt, thereby the uniform degree of a product is greatly improved; spherical nickel manganese lithium aluminate particles are prepared by using mechanical ball milling and spray pelleting technologies, thereby the stacking density of the materials is improved and the volume energy density of the battery is further increased. Besides, the method realizes that a nickel manganese aluminum precursor is fully mixed with the lithium salt, therefore, the batch stability of the products is improved and large-scale production is facilitated.

The invention discloses a system for automatically and quickly distributing drilling liquid. The system comprises a programmable logic controller (PLC) automatic control system, an air source system, a storage system, a dry mixing system and a slurry mixing system; the air source system comprises an air storage tank, a large-scale air compressor, a dry cooling machine, a small-scale air compressor and an air supply pipeline which are uniformly distributed on a forced draught fan package; the storage system comprises a raw material storage tank, an additive storage tank, a dust removal tank, weighing sensors which are arranged at bottoms of the raw material storage tank and the additive storage tank, a raw material gas conveying pipeline and a dust removal pipeline; the dry mixing system comprises a primary mixing tank and a batch mixing tank which are arranged on a dry mixing package, weighing sensors which are arranged at bottoms of the primary mixing tank and the batch mixing tank, a primary mixing pipeline, a batch mixing pipeline, and a primary mixing tank and batch mixing tank mixing circulation pipeline; and the slurry mixing system comprises a stirring pool, a stirrer which is arranged on the middle part of the stirring pool, a diffusion groove which is formed on one side of the stirrer, a high-energy mixer which is arranged on the upper part of the diffusion groove, a slurry mixing pipeline, a slurry conveying pipeline and a densitometer which is arranged on the slurry conveying pipeline; and all the systems are matched to realize automatic slurry distribution.

The invention discloses a method for manufacturing cast magnesium alloy, omprising the steps: 1, batching: calculating the percentage of elements including Gd, Y, Zr, and Mg as balance; calculating the weight and the respective batching weight of elements; 2: smelting: adding in sequence Mg, Mg-Gd, Mg-Y and Mg-Zr with Gd, Y and Zr as intermediate alloy; feeding in SF6/CO2 protective gas for refining; dredging up dregs at the bottom of a crucible, then reheating the crucible to 780-800 DEG C, standing the crucible for 30 minutes under heat preservation, and cooling the crucible to 730-740 DEG C along with furnace and subsequently removing scum on the surface; 3: pouring: preheating a mould, adjusting the temperature of magnesium alloy melt and pouring; 4: heat treatment, including: solution treatment and aging treatment. Solving the problems of high cost, low elongation percentage, inadequate heat resistance of the manufactured material, environmental pollution and the like, the method obtains the effect of high strength, good heat resistance, small tendency of incompactness, segregation and crack of the manufactured material.

The invention discloses a microwave on-line grain moisture content detection device and a method thereof. The device comprises a microcontroller, an interface circuit and a computer, which are sequentially connected with each other, and also comprises a high-frequency signal generator for generating a high-frequency signal, a high-frequency signal receiver for receiving the high-frequency signal which transmits through the grain, a signal regulation and detection circuit for detecting the amplitude value and phase difference of the high-frequency signal which is picked up by the high-frequency signal receiver and the high-frequency signal before transmitting through the grain and for transmitting the picked moisture content detection result to the computer through the microcontroller and the interface circuit, wherein the computer performs the density compensation for the moisture content detection result according to the density compensation algorithm. The auxiliary high-frequency signal amplitude value and phase difference detection technology and the density compensation algorithm are adopted to solve the density spacing influence of the grain particles.

The invention discloses a preparation method of a graphene-coated lithium nickel cobalt manganate composite material. The method comprises the following steps of preparing graphene with properties ofeasy separation, high water dispersity and high electrical conductivity in a green and efficient manner by combination of a water phase "intercalation-expansion-oxidization" method and a gamma-ray irradiation reduction technology; by adopting a high-temperature calcining method and by taking spherical manganese dioxide as a template, skillfully preparing a spherical ternary material which has a hollow structure and is formed by nanometer lithium nickel cobalt manganate primary particles, and performing surface modification treatment on the spherical ternary material; and further controlling proper conditions to enable graphene to be uniformly and firmly coated on the surface of lithium nickel cobalt manganate to obtain the target composite material. The raw materials involved in the invention are low in cost, the preparation process is high in controllability, and adopted water or an ethyl alcohol solvent is environment friendly; the composite material is excellent in electrochemical performance; the specific capacity can be as high as 265 mAh g<-1>; and after 500 cycles, the capacity retention rate can be 86%, so that the composite material can be widely applied to the lithium ionbattery and other electrochemical energy storage devices.

The invention provides an urban rail vehicle traction system. The system comprises a power device and an energy storing device; the power device comprises a traction inverter connected with a power supply network, and a traction motor connected with the output end of the traction inverter; the energy storing device comprises a DC/ DC convertor, a super capacitor and a power battery; the super capacitor and the power battery are connected in parallel; a negative electrode of the super capacitor is connected with the negative electrode of a DC bus of the power supply network, and while a positive electrode of the super capacitor is connected with the positive electrode of the DC bus of the power supply network through the DC/ DC convertor; the DC/ DC convertor controls the super capacitor and the power battery to charge and discharge, and the discharged electricity is supplied to the power device through the DC/ DC convertor. According to the traction, the super capacitor and the power battery are connected in parallel to be used as an energy supply source, and therefore, the performances of the urban rail vehicle crossing a non-power area can be fully improved when separating from the power supply network.

The invention discloses a lightweight warping-resistant continuous glass fiber enhanced polypropylene composite material, and a preparation method thereof. 100 parts of the lightweight warping-resistant continuous glass fiber enhanced polypropylene composite material comprises, by mass, 45.2 to 65 parts of polypropylene, 25 to 35 parts of continuous glass fiber, 6 to 12 parts of hollow bead, 2 to5 parts of a compatilizer, 0.3 to 0.8 part of an anti-oxidant, 0.5 to 1.0 part of a lubricant, and 0.3 to 1.0 part of a coupling agent. The lightweight warping-resistant continuous glass fiber enhanced polypropylene composite material is obtained via uniform mixing and extrusion processing. Full utilization of the advantages of hollow beads that intensity is low and isotropy is achieved is realized, problems of glass fiber enhanced polypropylene composite materials such as high density and easily caused warping are solved without influencing the physical mechanical properties of glass fiber enhanced polypropylene; the commercial available hollow bead products and continuous glass fiber relatively low in cost are selected to realize strict control on raw material cost. The preparation method is capable of ensuring the shearing strength of continuous glass fiber, and avoiding broken of hollow beads at the same time; and the performance of the prepared materials are better.

The invention provides a lithium iron phosphate composite material coated with a ternary carbon source and a preparation method of the material and belongs to the technical field of positive materials for lithium ion cells, aiming at the defects of poor conductivity and low tap density of lithium iron phosphate. The invention provides a modification method of the lithium iron phosphate composite material coated with the ternary carbon source according to the characteristics including pyrolysis characteristics, carbonization degrees, dispersion manners, residual carbon structures, reduction activity and the like of different carbon sources, based on a process and reaction process of preparing the lithium iron phosphate by using a carbon heat reduction method; micro-molecular water-soluble organic matters, high-molecular polymers, graphene compounds, iron source compounds, phosphorus source compounds and lithium source compounds are ball-grinded and homogenized and then are dried to prepare a composite precursor; then the composite precursor is sintered to obtain the lithium iron phosphate composite material. According to the lithium iron phosphate composite material coated with the ternary carbon source, the problems that the conductivity of the lithium iron phosphate composite material is low, the lithium ion diffusion coefficient is low, the tap density is low, and the like are solved.

The invention discloses a method for manufacturing purple mud pottery. The method comprises the following steps: selecting drying and crushing kaolin, red porcelain clay and yellow clay, adding water into the mixture, adding screened river sand to prepare mud, molding, drying in the shade, patching, manually manufacturing a mouth, a kettle handle and the like, assembling the mouth, the kettle handle and the like with a kettle body, polishing, performing press polish, drawing, sculpturing, carving, drying in the shade at low temperature, drying at medium temperature, drying at high temperature, firing in a kiln, discharging from the kiln to obtain a finished product. Because the raw material formula is improved, the large-scale kaolin and river sand are added on the basis of the original yellow clay and red porcelain clay, the density of the pottery products is improved, particularly the firing temperature is increased, the problems that the sintering hardness and the density can not be meet during low-temperature firing are solved, the problem that high-temperature firing water seepage can not be realized is solved, and the pottery is bright in color, ideal in air permeability and exquisite in workmanship and is a brand new pottery product.

The invention discloses a grid-based spatial multi-scale fast clustering method. The method includes the following steps that: S1, a data scale is selected, the size of grids is determined, gridding is performed on sample data, and the density values of the grids is put into statistics; S2, an initial density threshold is specified, all grids satisfying the threshold condition are reserved, and apreliminary density matrix is obtained; S3, a filter template is specified according to an observation scale, and convolution operation is performed on a global grid space; S4, a connected region is generated through neighborhood search so as to be adopted as a preliminary clustering result, integration operation is performed on the grids, the grid space is mapped onto an original point set, and an original point set clustering result is obtained; S5, the observation scale is adjusted, a transformed new filter is adopted to perform operation in the S3 and S4 on a result matrix again, a clustering result of the next observation scale is obtained; and S6, the data scale is changed, the S1 to S5 are repeated, clustering results under different data scales are obtained. The algorithm of the invention has the advantages of low complexity, high clustering efficiency and high precision, and can meet the requirements of real-time multi-scale clustering and visual analysis of massive point sets.

Disclosed is a simplified tree form reforming method suitable for a high-density jujube orchard. Since the grafting year of direct seeding and orchard building or the planting year, by about five-year continuous reforming, a jujube head form tree is formed with tree height of 2.5-3.5 meters, branch spreading of 1-1.5 meters, central trunk bending upwards, and 10-20 bending horizontally stretching fruiting branch groups directly inserted on the central trunk. The reforming method is suitable for wide-row dense-planting high-density jujube orchards (tree row space is 0.5-1.5m*3-4.5m), and simple in reforming. The reformed trees are slim and high, the branches are well-spaced without crossing, large row space can be guaranteed under high-density conditions, good ventilation and light permeability are achieved, high and stable yield and good quality are guaranteed, mechanical operation is facilitated, manpower for cutting is saved by more than 80%, and the problems that the high-density jujube orchard is prone to closing, complex to manage and the like are solved.

The invention discloses aqueous graphene slurry and a preparation method thereof. The aqueous graphene slurry comprises aqueous dispersion liquid and a graphene material dispersed in the aqueous dispersion liquid, wherein the aqueous dispersion liquid contains a surfactant, and the mass content of graphene is 0.2 to 12%. The preparation method for the aqueous graphene slurry comprises the following steps: with a graphite oxide solid or an expandable graphite solid as a raw material, performing expansion treatment to prepare expanded graphite; immersing the expanded graphite in an aqueous stripping solution for infiltration treatment to obtain a mixture containing the expanded graphite; subjecting the mixture containing the expanded graphite to high-speed shearing or ultrasonic treatment toremove the aqueous stripping solution and obtain a wet graphene material; and adding the wet graphene material in aqueous dispersion liquid, and carrying out high-speed shearing to obtain aqueous graphene slurry. The aqueous graphene slurry prepared by using the method of the invention can be applied to the fields of electroconductive and heat-conductive coatings, anticorrosive coatings, batteries/supercapacitors and the like.

The invention provides a multifunctional intelligent street lamp. The street lamp comprises a base, a street lamp pole and a lamp holder, wherein an LED light source is arranged in the lamp holder; anenvironment monitoring system is arranged at the top of the streetlamp pole; the upper end of the streetlamp pole is connected with an auxiliary power generation module; the upper end of the street lamp pole is provided with a video monitoring system, a micro base station and an RFID radio frequency identification module; a multimedia display screen is also arranged on the street lamp pole; a charging pile is arranged at the lower end of the streetlamp pole; a control module, a storage battery and an energy charging conversion module are arranged in the street lamp pole; the storage battery is respectively connected with the control module and the energy charging conversion module; the energy charging conversion module is electrically connected with the auxiliary power generation module;and the control module is respectively connected with the environment monitoring system, the video monitoring system, the micro base station, the RFID radio frequency identification module, the multimedia display screen and the charging pile. The street lamp disclosed by the invention realizes monitoring and control in the fields of illumination, traffic, security and protection, environment and the like while meeting the reasonable utilization of electric energy resources, so that the life of people is more intelligent and diversified.

The present invention discloses a nickel-base high-temperature alloy/titanium alloy composite material for aero-engine. The material comprises the following three layers of metal materials: a nickel-base high-temperature alloy plate (2) on the upper layer, a nickel-base high-temperature alloy plate (5) on the lower layer and a titanium alloy plate (4) in the middle layer, wherein the material trademark of the titanium alloy is Ti-6Al-4V, the chemical components of the titanium alloy comprise 5.5-6.75% of aluminum, 3.5-4.5% of vanadium, and the balance of titanium, the material trademark of the nickel-base alloy is K4169, and the chemical components of the nickel-base alloy comprise 0.5% of aluminum, 0.05% of zirconium, 1.0% of titanium, 3.0% of manganese, 5.2% of niobium, 18.5% of chromium, 52% of nickel, 3.0% of molybdenum, 0.05% of carbon, and the balance of iron. According to the present invention, the bonding rate of the composite material achieves 100% and achieves metallurgical bonding, the nickel-base high-temperature alloy has characteristics of high temperature ablation resistance and high high-temperature strength, and can be used for a long time at a high temperature, the titanium alloy can provide a structure support effect, and the composite material has characteristics of light weight, high temperature resistance and high strength, and is a novel aircraft engine composite material with characteristics of light weight, high strength and high temperature resistance.

The invention discloses a preparation method of a component-gradient-controllable multi-element ultrahigh-temperature ceramic modified C/C composite material. Through multi-section design of various ultrahigh-temperature ceramics (ZrC, HfC, HfB2 and the like) and high-temperature ceramic (SiC) composite modified C/C composite materials, a ceramic phase forms a continuous component gradient distribution form in a C/C matrix, ablation resistance and oxidation resistance requirements of different temperature range fields are met regionally, and meanwhile the defect that the mechanical property isreduced due to component mutation is overcome. According to the invention, a preparation process of combining molten salt infiltration and common reaction infiltration and gradient infiltration powder configuration are adopted in sections, so that near-ablation-end strong ceramic phase interface design is realized, and ceramic phase distribution realizing that the content of an ultrahigh-temperature ceramic phase is sequentially decreased from the near ablation end to a far ablation end and the high-temperature ceramic phase is sequentially increased is regulated and controlled; finally, thegradient ceramic-based composite material with different ceramic phase components and contents in gradient change and meeting the performance requirements of the material is formed.

The invention discloses a device and a method for diversity reception and transmission of TD-SCDMA mobile communication systems in a wireless base station which uses two antennas and an RF transceiver connected. The installation space of the antennas is at least dozens of working wavelengths. The invention solves the problems of poor relativity formed by the antennas and the RF transceiver connected, difference of time delay and phase of signals received by 2 completely irrelevant links of a transceiving link and a user terminal. The invention solves the problem of low user density of rural and suburban districts which need big area coverage radius. The cost of each base station may be reduced by more than 20%.

The invention relates to a yam plantation method, in particular to a mechanical directional half sleeve pipe yam ridge cultivation method which comprises the following steps: (1) carrying out deep plowing in winter to improve soil structure and reduce the diseases, pests and of harmful grass in yam land; (2) mechanically ridging in the middle ten days of April in spring by using a yam land ridging machine, wherein the heights of the ridges are 35-40cm; (3) directionally cultivating by using half sleeve pipes; and (4) mechanically harvesting in the middle or last ten days of October by using a yam harvesting plough. The invention has the advantages of saving yam planting and harvesting cost, creating the novel convenient, efficient, directional and labor-cost saving yam cultivating mode, overcoming the defect that the underground water level raises to cause adverse effect to the formation and the yield of the yam which is the tuber crop, solving the problems of mechanical ridge cultivation, high-density planting and mechanical harvesting and promoting the large-scale intensified and industrialized yam production. Due to the adoption of the method, the labor intensity is greatly reduced, the labor efficiency is improved, and the ridges are uniform and have good shapes.

A light energy collection and full reflecting light energy transmission system belongs to a solar energy collection and transmission device and comprises a concave collecting mirror, wherein the focal position of the concave collecting mirror is provided with a light energy density multiplier through a positioning bracket; the cylindrical light output end of the light energy density multiplier is connected with a full reflecting light transmission rod which is connected with a soft light transmission pipe; the light transmission pipe transmits light energy to using points; the light energy density multiplier is composed of a light energy density multiplication convex lens, a lens positioning body, a coat, a light transmission direction regulation convex lens or a light transmission regulation concave lens and a light transmission output end. The light energy collection and full reflecting light energy transmission system utilizes the full reflecting broadcasting principle of light in media to realize solar energy density multiplication and low-loss transmission of energy and expands the application field of the technology.

The invention discloses a high-strength refractory six-element high-entropy alloy CoCrFeNiVAlx and a preparation method thereof. The high-strength refractory six-element high-entropy alloy is composedof cobalt, chromium, iron, nickel, vanadium and aluminum which all have the purity of at least 99.9%; and all the elements are calculated according to the atomic percent, specifically, Co is 14-20 at%, Cr is 14-20 at%, Fe is 14-20 at%, Ni is 14-20 at%, V is 14-20 at%, and Al is 0-30 at%. The alloy is prepared through an intermediate alloying method, and the preparation steps include that Co, Ni,Fe and Al which are low in melting point are mixed and molten, Cr and V which are high in melting point are mixed and molten, smelting is performed repeatedly for several times, then two intermediatealloys are smelted, and smelting is performed repeatedly for several times so as to guarantee the uniformity. By means of the high-entropy alloy CoCrFeNiVAlx obtained through the method, the problemsthat Al is prone to being damaged by burning and multi-element alloy smelting is non-uniform can be solved excellently, the strength, hardness and plasticity are high, and the high-strength refractorysix-element high-entropy alloy CoCrFeNiVAlx and the preparation method thereof can be applied to the fields of aerospace, mechanical heavy industries and the like.

The invention relates to an on-line monitoring method for monitoring the aeolian vibration of a power transmission line. The method comprises the steps of transmitting first optical signals to multiple aeolian vibration monitoring devices arranged on a power transmission line, wherein the aeolian vibration monitoring devices receive the above first optical signals and reflect second optical signals by means of fiber-bragg gratings; according to the second optical signals and the first optical signals, calculating the amplitudes and the frequencies of monitoring objects so as to further obtain the total evaluation value of each monitoring object through the calculating process and finally obtain parameters on the degree of fatigue induced by the aeolian vibration of the power transmission line; and determining the aeolian vibration state of the power transmission line according to the parameters on the degree of fatigue. Based on the sensing mode of fiber-bragg gratings, the above method is higher in spatial resolution. Meanwhile, based on the comprehensive analysis on the total evaluation values of all monitoring object arranged on the power transmission line, the parameters on the degree of fatigue of the power transmission line can be obtained. According to the parameters on the degree of fatigue, the aeolian vibration state of the power transmission line can be accurately determined. Therefore, the on-line monitoring reliability for the aeolian vibration state of the power transmission line is improved.

The invention relates to a method, device and system for achieving flow management. The achieving method includes: building a corresponding relation between user's demands and external devices; distributing hardware addresses (MAC addresses) relative to the external devices for all the external devices, and performing corresponding binding on switchboard ports; and receiving messages, and sending the messages to the external devices corresponding to the messages in a mirror image or redirection mode. A switchboard is added between an information transfer module (ITM) device and the external devices so as to enable the ITM to be capable of being connected with more external devices, and therefore the method, device and system for achieving the flow management can perform different processing on different flow, and simultaneously solves the problem that performances of the external device are insufficient and density of the ITM is not enough. Furthermore, the MAC addresses are bound to different ports through the switchboard, the method, device and system for achieving the flow management achieves various different requirements of a user correspond to the external devices with various different functions and sends the messages in the mirror image or redirection mode.

The invention provides a fresh food supply chain knowledge graph construction method based on semi-structured data, which is used for collecting and processing the semi-structured data to achieve thepurposes of effectively integrating the existing data resources and exploring the intrinsic data value of massive information, so that a high-quality knowledge graph with a rigorous structure and a complete system is constructed. Semi-structured data in a webpage where a target is located are crawled by utilizing a webpage crawler technology, so that the data acquisition efficiency is improved; aplurality of pieces of structured data containing entity names and entity attributes are obtained by means of a regular expression, so that the constructed knowledge graph is more scientific and accurate; the structuralization is converted into an RDF triple form by using a structuralization data mapping tool D2RML which is convenient for a user to use and understand; mapping from RDF triple datato a graph data structure is achieved, fresh food supply chain data are stored in a Neo4j graph database, and the problems that the fresh food supply chain data size is large, the data value density is low, and the updating speed is high are solved.

The invention relates to grinding roller sealing ring materials. The grinding roller sealing ring materials are characterized by comprising, by weight, 100 parts of fluororubber, 10-20 parts of organic montmorillonite, 10-30 parts of wear-resisting carbon black, 5-20 parts of modified silicon carbide, 10-20 parts of graphene composites, 15-25 parts of magnesium oxide, 0.5-2 parts of hydroxyl silicone oil, 0.1-3 parts of microcrystalline wax, 0.5-2 parts of bisphenol AF and 0.5-1.5 parts of benzyl triphenyl phosphoric chloride. The graphene composites are graphene/ hydrogenated styrene- butadiene- styrene compounds subjected to in-situ reduction. The graphene/ hydrogenated styrene- butadiene- styrene compounds subjected to in-situ reduction are added, the graphene composites are dispersed easily, the problems of difficult stripping of graphene and difficult addition caused by low apparent density in the prior art are resolved, graphene can be evenly dispersed in the grinding roller sealing ring materials, the function of the graphene is fully played, and the wear resistance and heat resistance of the grinding roller sealing ring materials are effectively improved.

The invention provides a three-dimensional stackable phase change storage array device and a preparation method thereof. In the three-dimensional stackable phase change storage array device, a grid electrode of a non-junction type transistor adopts a stepped elicitation mode of a control grid electrode to form an SSL control end. A phase change storage unit exists at the junction point of a WL, a BL and the SSL to realize reading, writing and scraping operation on every storage location point. In addition, a stacked structure composed of a grid electrode conductive material and an insulating medium layer stretches across two adjacent wolfram plugs, the sharing of a phase change material layer is realized, the process cost is reduced to a large extent, and the storage density is improved. The preparation method of the three-dimensional stackable phase change storage array device is compatible with a traditional CMOS process, both the formation of the non-junction type transistor and the phase change unit are low temperature process, the heat treatment process has no performance drifting influence on a peripheral circuit, a channel of the non-junction type transistor adopts a heavily doped polycrystalline silicon material without a concentration gradient, and an additional photomask induced by doping processes such as ion injection is effectively avoided.