50 results about "Particle chains" patented technology

Provided is an abrasive particle chain self-adaptive segmentation method orienting online ferrographic image automatic identification. Step one, a transmitted light image and a reflected light image respectively provided by a ferrographic sensor are respectively preprocessed and converted into a binary image and a graying image; step two, the reflected light image Imgf is adopted to perform coarse segmentation on the basis of gray scale morphology; step three, fine-multi-scale binary morphological segmentation is performed on the binary image after coarse segmentation; a variable scale corrosion-expansion algorithm is adopted on each abrasive particle chain to realize segmentation of large and small abrasive particles so that a binary segmentation line is acquired; and step four, the binary segmentation line is superposed on the original transmitted light image and the reflected light image so that an abrasive particle image after segmentation can be acquired. An online abrasive particle chain image segmentation problem can be solved, and the method can also be applied to abrasive particle chain automatic segmentation in a conventional offline ferrographic image so that the method is significant for realizing intellectualization and automation of a ferrographic image analysis technology.

This invention provides a device and method for rotating magnetically inducible particles suspended in a fluid by rotating a multidirectional magnetic field through the suspended particles. A rare earth magnet is positioned adjacent to the suspended particles and oriented such that the axis of a magnetic field generated by the magnet passes through the suspension. The magnetic flux lines of the magnet's field radiate in multiple directions through the suspended particles, them to form long multidirectional chains. The magnet and the chains of suspended particles are rotated with respect to one another, the axis of the rotation being approximately parallel to the magnetic axis of the multidirectional magnetic field. This causes the particle chains to rotate about the magnetic axis, thus mixing the fluid.

A system for independent component analysis includes a feedback mechanism based on a plasticity rule, and an electro-kinetic induced particle chain, wherein the feedback mechanism and the electro-kinetic induced particle chain is utilized to extract independent components from a data set or data stream. The electro-kinetic induced particle chain is generally composed of a plurality of interconnected nanoconnections (e.g., nanoparticles) disposed between at least two electrodes in a solution, including for example one or more pre-synaptic electrodes and one or more post-synaptic electrodes. The feedback mechanism generally provides feedback to one or more particles within the electro-kinetic induced particle chain, while the plasticity rule can be non-linear in nature. The feedback mechanism also provides for one or more evaluate phases and one or more feedback phases.

An apparatus and method for vibration suppression using a granular particle chain. The granular particle chain is statically compressed and the end particles of the chain are attached to a payload and vibration source. The properties of the granular particles along with the amount of static compression are chosen to provide desired filtering of vibrations.

A method for conductively attaching a workpiece (110) onto a substrate (101). Spreading a layer of an adhesive polymeric compound (130) over the first surface (101a) of the substrate, the compound including a suspension of electrically and thermally conductive first particles (140) intermixed with a suspension of ferromagnetic surfactant-coated second particles (141). Applying an external magnetic field (401) to the layer, the field oriented normal to the first surface and capable of arraying the ferromagnetic particles in lines, and, by causality, aligning the conductive particles in chains normal to the first surface. Orienting the second surface (110a) of the workpiece parallel to the first substrate surface (101a) and bringing the aligned conductive particle chains (140) in contact with the first and second surfaces by pressing the workpiece onto the layer and piercing the chain ends to touch the first and second surfaces.

The invention discloses a rigidity-adjustable bushing which comprises an inner barrel and an outer sleeve which are internally and externally coaxially mounted, the inner barrel is externally and coaxially provided with a magnetorheological elastomer, the magnetorheological elastomer and the outer sleeve are each provided with a plurality of iron cores, and each iron core is wound by a magnet exciting coil for providing a magnetic field; a bracket is embedded into the position between the corresponding iron core and the outer sleeve, and the end faces of the two sides of the corresponding iron core and the outer sleeve are provided with baffles; the magnetorheological elastomer is formed by curing a rubber base body and soft magnetic iron powder particles, a particle chain is distributed in the radial direction of the bushing, the current is adjusted so that the mechanical property of the current can be changed. The rigidity adjustable bushing is simple in structure, capable of overcoming the defects that a traditional hydraulic bushing is dynamically hardened and is poor in stability and the like and capable of achieving real-time adjustment of the optimal bushing rigidity and plays an active role in improving smoothness and operation stability of an automobile.

The invention discloses a magnetic field control method adapting to a distortional magneto-rheological elastomer particle structure in the technical field of an intelligent material. According to the method, on the basis of deformation condition of a magneto-rheological elastomer in the work state, when the magneto-rheological elastomer is prepared, various factors influencing the magnetic field space distribution and the effect of a rotary magnetic field on the particle chain trend are synthetically considered; the design thoughts that the orthogonal magnetic field combination is adopted, in addition, the magnetic field intensity proportion is controlled, the pole shoe shape and the opposite arrangement orientation are designed, a mold and the magneto-rheological elastomer are combined into a section of magnetic path, in addition, the orientation of the magneto-rheological elastomer is controlled, a magnetic field interference block interfere the distribution and direction of magnetic force lines, an orthorhombic rotary magnetic field deflects a particle chain, and the like are adopted; a curing magnetic field is designed so that the shape of the particle structure formed in the magneto-rheological elastomer simulates the state of a linear shape particle chain obtained in the original preparation method after the deformation. The magneto-rheological elastomer prepared by the method has the advantages that the performance of the magneto-rheological elastomer can be improved, and the use range of the magneto-rheological elastomer is enlarged.

The invention relates to a preparation method of a transmission electron microscope observation sample of a magnetic liquid in a magnetic field. According to the invention, a certain amount of the magnetic liquid is dispersed in a solvent, such that a mixed liquid is formed; the mixed liquid is subjected to ultrasonic oscillation for approximately 15min, such that the magnetic liquid is uniformly dispersed and is suspended in the solvent, and a transparent dispersion liquid is formed; the dispersion liquid is placed in a transverse magnetic field and a longitudinal magnetic field; according to the testing requirements of the transverse magnetic field and the longitudinal magnetic field, a copper screen position is determined with the assistance of coordinate lines; the copper screen is immersed in the dispersion liquid, and is stood for 1min; the copper screen is drawn back, and is dried on a sealing membrane. Because of the high adsorption capacity of the magnetic particles, a single-layer magnetic particle chain structure is picked up by the copper screen, such that the transmission electron microscope observation sample of the magnetic liquid in the transverse magnetic field or the longitudinal magnetic field is prepared. The sample is delivered to a transmission electron microscope observation room, and the distribution state and arrangement condition of the magnetic particles in the transverse magnetic field or the longitudinal magnetic field can be observed.

An analog simulation method for predicting the particle balance interval of a multi-particle chain based on an IB-LB method is provided. According to the analog simulation method, information betweenfluid solids is accurately transmitted through an immersion boundary method, and accurate description of solid flowing is achieved. Different working conditions are constructed by adjusting model parameters, then the particle distribution condition in micro-scale flow under different working conditions is simulated, namely the axial and longitudinal key distribution positions and the particle spacing are simulated, and then the separation position and the separation frequency are given to control and split charging of particles. According to the invention, the target object can be accurately and efficiently sorted from the to-be-monitored sample for accurate guidance and prediction.

An ionically conductive composite separator for a rechargeable battery and methods for producing the same are provided. The separator may include a bulk material having an anode side and a cathode side and a thickness extending therebetween and a region of aligned particles extending across the bulk material thickness. The aligned particles may be formed as a particle chain and the particles may be formed of a solid electrolyte material. The ionically conductive separator may be formed by providing a plurality of particles within a bulk material and applying an AC electric field to the particles and the bulk material while the bulk material is in a liquid state to align the particles into at least one ionically conductive aligned particle region within the bulk material.

The invention discloses a magnetorheological material-based high-efficiency rotating speed control device, and belongs to the field of rotating speed control of Fuze turbine generators. The magnetorheological material-based high-efficiency rotating speed control device comprises an upper cover, an inner cylinder, a housing, a bottom, excitation coils, magnetic cores and a magnetorheological material, wherein the upper cover, the inner cylinder, the housing and the bottom form a substrate; a peripheral device comprises a turbine generator; the excitation coils are arranged between the inner cylinder and the housing and are vertical to a rotating shaft of the generator, so that the magnetic particle chaining direction in the magnetorheological material is vertical to the rotating shaft of the generator; magnetic core positioning slots are formed in the inner side of the housing and the outer side of the inner cylinder separately, circular grooves are adopted by the positioning slots andthe connection line of circle centers of each pair of positioning slots horizontally passes through the axis of the rotating shaft; and the diameters of the magnetic cores are matched with those of the corresponding grooves and the magnetic cores pass through the inside of the corresponding excitation coils through the matched positioning slots. According to the magnetorheological material-based high-efficiency rotating speed control device, improvement of the energy conversion efficiency of the magnetorheological material is achieved by combining the magnetic characteristics of the magnetorheological material.

The invention discloses a strain gauge based on a magnetorheological elastomer. The strain gauge comprises an upper insulation film and a lower insulation film. An upper electrode plate is fixedly arranged on the lower surface of the upper insulation film in an attaching mode. A fixing upper lead is welded to the upper electrode plate, and a lower electrode plate is fixedly arranged on the upper surface of the lower insulation film in an attaching mode. The lower electrode plate and the upper electrode plate correspond, a fixing lower lead is welded to the lower electrode plate, and the magnetorheological elastomer which is in a flake shape is arranged between the upper electrode plate and the lower electrode plate. The upper end face and the lower end face of the magnetorheological elastomer are fixed with the upper electrode plate and the lower electrode plate respectively in an attaching mode. Pre-structured soft magnetic particles in the magnetorheological elastomer form a plurality of soft magnetic particle chains, and the axes of all the soft magnetic particle chains are all perpendicular to the upper end face and the lower end face of the magnetorheological elastomer. The strain gauge based on the magnetorheological elastomer is high in precision and wide in application range.

The invention discloses a method for manufacturing a surface plasmon polariton nanometer photonic device. The method comprises the steps that a silicon substrate is prepared; lower electrode metal is grown on the silicon substrate with silicon oxide formed on the surface; the lower electrode metal is coated with a photoresist layer in a spinning mode, a hot plate is roasted, the photoresist layer is exposed through a mask and then is developed, a through hole array is formed on the photoresist layer, and the lower electrode metal below the photoresist layer is exposed out of the through hole; an oxide layer is deposited in the through hole; upper electrode metal is evaporated in the through hole; the photoresist layer, and the oxide layer and the upper electrode metal on the photoresist layer are peeled off, the lower electrode metal is exposed, and a device with a protruding array on the surface is obtained; positive voltage is added on the protruding upper electrode metal, the lower electrode metal is grounded, a metal nano-particle chain is formed inside the protruding oxide layer under excitation of an electric field, and the surface plasmon polariton nanometer photonic device is obtained. By the utilization of the method for manufacturing the surface plasmon polariton nanometer photonic device, the problems that an existing nanometer photonic device is large in size, complex in manufacturing and high in cost are solved.

The invention discloses a radioactive particle chain connected by controllable and fast degradable magnesium and a magnesium alloy and belongs to the field of medical devices implanted in bodies. The radioactive particle chain with certain length is prepared by connecting the controllable and fast degradable magnesium, the magnesium alloy 1 and radioactive particles 2 through welding at certain distances. The radioactive particles have the therapeutical effect, and the magnesium and the magnesium alloy are used as connecting materials, so that the radioactive particle chain comprises unique controllable and fast degradation characteristics. The radioactive particle chain has the functions of ensuring uniform distribution of the particles, preventing the particles wandering, and reducing distances among the particles with reduction of tumors and making the particles uniformly distributed on focuses all the time when the particle chain is degraded after being implanted for 1 to 2 months. The radioactive particle chain is suitable for curing extensive diseases such as intracranial tumors, nasopharyngeal carcinoma, oropharyngeal carcinoma, tongue cancer, cervical metastatic tumors, lung cancer, breast cancer, pancreatic cancer, cholangiocarcinoma, liver cancer, prostate cancer, gynecological tumors, and soft tissue and bone tumors.

The invention discloses a method for preparing an environment-friendly polylactic-acid composite material with high tensile strength and belongs to the technical field of preparation of macromolecularcomposite materials. According to the method, firstly, polylactic acid is modified with dimerized salicylide crystals, a benzene ring is introduced into a principal chain after modification, the principal chain of the polylactic acid is hardened due to the benzene ring, and thus, mechanical properties of the polylactic acid are improved; then, starch is modified, and the dependence between the modified starch and the modified polylactic acid in an entire compound system is enhanced, so that the cohesive force between two phases of the starch and polylactic acid composite material is increased; then, glass fibers are added into polylactic acid, staggered polylactic acid particle chains are connected among the glass fibers, the glass fibers and the polylactic acid jointly bear a load and are used for modifying a composite material as filler, and the tensile strength of the composite material is further improved; zinc oxide has biological affinity and has a composite material skeleton regenerating promoting effect as a zinc supplement, so that the composite material is economical and environmentally friendly and can have a broad application prospect.

The invention discloses a device for testing the impact mechanical characteristics of a one-dimensional magnetic particle chain, and the device mainly consists of an optical panel, an electromagnetic carrying table, a sensor carrying table, a T-shaped platform, a pendulum bob, a pendulum bob support, a sucking disc electromagnet fixing disc, an upper clamping block, a supporting shaft, an electromagnet, a pressure sensor, a bearing, a swinging rod, a rib plate, a sucking disc electromagnet, and magnetic particles. The device is characterized in that the device is simple in structure, is small in size, is easy to disassemble and move, and is economical and practical; measurement elements are convenient to install and connect, and can carry out the measurement easily; the device can simulate impact loads with different amplitudes; the device can change the magnetic particles in different physical dimensions and the arrangement mode of the magnetic particles; the device can simulate a magnetic field environment, and adjusts the intensity of the magnetic field environment through the replacement of different types of electromagnets; the device provides an important testing platform for the research of the impact mechanical characteristics of the one-dimensional magnetic particle chain.

The invention relates to the field of medical instruments, in particular to a spiral close-range radionuclide radiotherapy device and a particle automatic loading assembly. The device comprises: a cylindrical bracket and a drainage tube; a spiral first groove is formed in the bracket, and the drainage tube is spirally mounted in the first groove; and a plurality of radioactive particles are installed in the drainage tube. The drainage tube is fixed on the outer periphery of the bracket, which can implant particles in a biliary tract to perform radiotherapy, and can expand the biliary tract sothat the bile can flow normally; the particle chain has the same flexibility, certain peristalsis and self-alignment function as the bracket, so that the particle chain can be stably placed at a specified location. When a fan-shaped pendulum block in the particle automatic loading assembly is oscillated and rotated, a process where a particle body at the gap is pushed out by a particle body push device, the particle body to be loaded in a particle box slides down to the gap to be clamped is performed circularly, and the particle body can be continuously fed and sent during the swinging of thefan-shaped pendulum block.

The invention discloses a particle chain shock absorber. The shock absorber comprises a hollow cylinder, acrylic glass balls, a baffle plate and multiple particle chains. The acrylic glass balls are embedded in the bottom of the hollow cylinder and used for reducing vibration strength and preventing the particle chains from falling off from the bottom of the hollow cylinder. The baffle plate is arranged on the upper part of the hollow cylinder. The particle chains are arranged in the hollow cylinder. Each of the particle chains comprises at least eight particles and is initially placed on the lower surface of the interior of the hollow cylinder in a screw type manner. The invention also provides a particle chain damping measuring method. The shock absorber produces obvious damping effects, and is simple and firm in structure, easy to maintain and capable of working in very wide range of humidity and temperature and vibration frequency, and dissipation power can be easily adjusted. The damping measuring method tests the damping effects of the shock absorber.

The invention relates to a cold-silver composite nano chain antibacterial agent synthesizing method. The method includes the steps: (1) adding a template agent into AgNO3 solution, adjusting system pH value to be 10, dripping a reducing agent into the reaction solution under the condition of stirring, and subjecting the reaction solution to ageing for 1-5h at the room temperature to obtain a Ag nano-particle chain; (2) adding the Ag nano-particle chain into a reactor, using a dispersing agent for dispersing in deionized water, placing a HAuC14 solution filled test tube with a semipermeable membrane seal and a hydrazine hydrate solution filled test tube with a semipermeable membrane seal in the Ag nano-particle chain contained reactor upside down, placing the whole system in an ultrasonic disperser for ultrasonic treatment for 5-10min, subjecting the obtained solution to centrifugal separation, washing for several times, and naturally drying to obtain a Au/Ag composite nano chain. Compared with the prior art, the cold-silver composite nano chain antibacterial agent synthesizing method has the advantages of low preparation cost, technical simplicity, avoidance of pollution, high dispersibility and regular structure of products and the like.

The invention discloses a method for preparing Fe3O4 powder with a controllable form by using a local magnetic field change, and relates to the technical field of preparation and application of nanometer powder. The method controls the change of a local magnetic field by magneton with different sizes, and obtains Fe3O4 powder materials with various forms by a hydrothermal reaction in a reaction system composed of ferrous sulfate (FeSO4.7H2O), sodium citrate (Na3Cit) and ammonia water; as the size of the magneton is changed from small to large, the prepared Fe3O4 powder material is gradually transformed from the nano-particle to a particle aggregate through a particle chain, and the morphology of the Fe3O4 powder can be prepared in a controllable mode. The method has the characteristics ofbeing simple in operation, environmentally friendly, high in saturation magnetization of the obtained chain-type Fe3O4 powder and easy in magnetic separation. The method uses the single ferrous sulfate as an iron source to prepare Fe3O4, fewer raw materials are used, no other by-products are produced, and environmental friendliness is good.

The invention provides a water-soluble silver micro/nano crystal and a controllable preparation method thereof, and relates to the technical field of silver micro/nano crystal preparation. The methodincludes the two processes of preparation of a reaction precursor solution and a rapid reduction reaction at room temperature. Firstly, a silver nitrate solution is prepared, then ascorbic acid (VC) solids are added into the silver nitrate solution, and finally the water-soluble silver micro/nano crystal is obtained through the rapid reduction reaction at room temperature; and a water solution ofa surfactant can be added when the silver nitrate solution is prepared. The prepared Ag micro/nano crystal is a micro-crystal composed of countless Ag nano particles, and a quasi-spherical Ag micro/nano crystal (no surfactant is added), a dendrite Ag micro/nano crystal (Blue Moon liquid soap LYL is adopted as the surfactant) and a particle-chain-shaped Ag micro/nano crystals (stearic acid micro-emulsion ALA is adopted as the surfactant) can be obtained separately by changing the varieties and the use quantities of surfactants. The obtained product is good in water solubility, dispersity and stability and is expected to be used for the waterborne anti-bacterial coating production industry.

The invention relates to a radioactive brachytherapy device, particularly relates to a degradable radioactive particle chain with shape memory function. The degradable radioactive particle chain comprises at least one radioactive particle and a coating layer, wherein the radioactive particles are radioactive sources and at least a portion of the radioactive particles is coated with the coating layer. The coating layer material comprises polycaprolactone(PCL). The particle chain made of PCL as the main molding material has the shape memory function, which enables an implanting operation of the particle chain to be simple and can maintain a certain supporting force to lumen and glands, and ensures that the particle chain is implanted without affecting a normal physiological function of the lumen and the glands. Meanwhile, the PCL has the advantages of biodegradability and low melting point.