321 results about "Particle system" patented technology

The present invention provides a method for the covalent immobilization of biomolecules on polymers for delivery of the biomolecules, which has the advantage of being simple, highly efficient, environmentally friendly and free of side products relative to traditional immobilization techniques. The invention provides a modified micro/nanoparticle system, which uses a functionalized polymer formed into micro or nanoparticles to bind a molecule to the particles using uses facile chemistry, the Diels-Alder cycloaddition between a diene and a dienophile with the polymer being functionalized with one of them and the molecule with the other, or the Huisgen 1,3-dipolar cycloaddition between a terminal alkyne and an azide to bind the molecule to the particle. The molecules and/or other therapeutic agents may be encapsulated within the polymer particles for intravenous therapeutic delivery. The invention also provides a novel synthetic biodegradable polymer, a furan/alkyne-functionalized poly(trimethylene carbonate) (PTMC)-based polymer, whose composition can be designed to meet the defined physical and chemical property requirements. In one example, the particle system self-aggregates from functionalized PTMC-based copolymers containing poly(ethylene glycol) (PEG) segments. The composition of the copolymers can be designed to meet various particle system requirements, including size, thermodynamic stability, surface PEG density, drug encapsulation capacity and biomolecule immobilization capacity.

A method to increase the ease and effectiveness of biofeedback by dynamically representing physiological indicators on a computer display using a configurable particle system. This particle system consists of a number of similar objects, each object having properties such as location, velocity, lifetime, color, image, transparency, size, and shape, where at least one of these properties has a random component. The objects' properties are continuously updated over time, and also updated as the physiological indicators change. The particle system can be easily set to represent physiological indicators in many different manners, or to simultaneously represent many different physiological indicators.

A co-simulated manoeuvring method of distributed multi-role mode includes utilizing virtualized reality and distributed simulation technique and using particle system and intelligent substitute to reappear manoeuvre site, using manoeuvre emergency preplan to guide manoruvre process, applying manoeuvre whole course monitor platform in synchronization with 3-D manoeuvre environment to monitor and control maneoeuvre process then applying databank technique and data match-identification technique to evaluate effect of manoeuvre.

The invention belongs to the field of powder paints and particularly relates to a self-cleaning super-weather-proof powder paint. The self-cleaning super-weather-proof powder paint comprises a carboxyl-terminated polyester particle system and a fluorocarbon resin particle system in a weight part ratio of 4:1-1:4, wherein the fluorocarbon resin particle system contains TiO2 nano-particles. As carboxyl-terminated polyester is introduced into a pure fluorocarbon paint, the phase separation occurs in a solidification process, and the fluorocarbon resin floats up to the surface of a coating to serve as coating protection and ageing resistance; the carboxyl-terminated polyester and the like and a substrate can be well wetted, so that the coating and the substrate can be well adhered and can hardly crack and spall; as the TiO2 nano-particles only exist in a fluorocarbon phase, the resin on a bottom layer cannot be broken, and the excellent stability of the system is guaranteed; and the TiO2 nano-particles are scattered in a dry blending manner, and the complex preprocessing is avoided, so that the preprocessing process can be greatly shortened, the cost is lowered, and the efficiency is improved.

A computer-based method for generating vegetation such as 3D models of trees. The method includes providing in memory a template with model growth rules. A computer processor positions a seed particle in a location in digital 3D space. The base particle is associated with a set of attributes stored in the memory, such as attributes or values provided in the template. A generator module generates the tree model (e.g. a particle system) using a particle-based growth process starting with the seed. The particle growth includes iteratively generating additional particles and also includes gathering environmental data regarding the 3D space for the particles. Then, the method includes determining a move direction for each particle based on the growth rules evaluated with the environmental data The particles are moved to new positions using the move direction, and these steps are continued through time steps to create the tree model.

A deformation system for animation abstracts the notion of per-point deformation to create a pipeline, including a number of deformation modules capable of handling animation of geometry (such as characters), dynamics (such as simulations) and/or effects (such as particle systems). Deformation pipelines are defined, that work as templates capable of deforming and animating families of similar characters. Support is provided for various binding modes, including sequential, parallel, blend, and hierarchical, so as to facilitate several techniques for combining deformations.

The invention relates to an improved flame-simulation acceleration algorithm based on a particle system, which comprises the following steps: (1) pretreating a generated track so as to record accelerated speeds, colors and life value attributes of particles; (2) generating particles with a particle emitter; (3) distributing a track to each particle; (4) obtaining more three attributes of the particle from the track and updating other attributes of the particle; carrying out the step (5) if the particle reaches an end frame of the track; rendering the particle; updating track information, and carrying out the step (6) if the track life is 0; and repeating the step (4) till the system exits; (5) regenerating the particles and distributing the tracks; and (6) recalculating the tracks and regenerating all particles on the tracks. Compared with a method of the traditional particle system and a track method, the improved flame-simulation acceleration algorithm has the advantages that the calculated amount of the traditional method is greatly reduced, so as to play a role in acceleration on one hand; on the other hand, the distortion problem of rendering in the track method can be solved, the rendering of large-scale surface combustion can be supported, and the improvement can be realized.

The invention relates to a method for rapidly detecting the residuals of organophosphorus pesticides in vegetables by utilizing an Au nano-particle colorimetric method, which belongs to the technical field of analytical chemistry. The method provided by the invention comprises the following detection steps: preparation of Au nano-particles (AuNps); establishment of a method for detecting organophosphorus pesticides, actual sample detection and the like. The method provided by the invention can simply, rapidly and sensitively detect methamidophos in the organophosphorus pesticides according to the color change of an Au nano-particle system, has high sensitivity and provides convenience for further research, production, supervision and the like.

The invention discloses a bituminous mixture compaction simulation method based on discrete elements. The method comprises the steps that a prescribed space region is generated through a 'wall' command in PFC<3D> software, and the space region is randomly filled with a particle system composed of coarse aggregates and bituminous mortar; partial bituminous mortar is randomly deleted; corresponding contact types are given to the interior of the coarse aggregates, the interior of the bituminous mortar and the space between the coarse aggregates and the bituminous mortar in a bituminous mixture; a 'clump', formed by gathering basic unit particles, in the PFC<3D> software is set to serve as a rolling wheel of a road roller, and the static pressure action on the bituminous mixture is achieved through rolling wheels of the road roller under the action of gravity; excitation force is given to the 'clump', the excitation force of a 'clump' system is coupled with the gravity, and vibrating compaction action is simulated; compaction of compaction road rolling wheels to the bituminous mixture is controlled through fish language programming. The method is easy and convenient to use, economical and effective and has certain significance to construction of a bituminous mixture pavement.

A software library using a 3D graphics engine to produce a real time 3D particle explosion effect is provided. The particle explosion effect creation tool allows users to create their own particle explosion effect by defining their own shapes in a graphics image data file and allows to graphically define a plurality of explosion parameters of the video particle explosion effect in the graphics image data file. Particles are driven by a particle system algorithm that is controlled by real-world attributes such as gravity, direction and dispersion. These attributes can be keyframed by the users within a video editing application to produce specific 3D Particle explosion effects such as transitions and filters on video or graphics.

The invention provides a method for calculating particles on a GPU by utilizing a multi-body interaction model, comprising the following steps: storing the attribute information of particles in a particle system and labeling information of an adjacent particle of each particle to a system memory on a computer loaded with the GPU; transmitting the attribute information and the labeling informationto a global memory of the GPU; opening up a storage array for the acting force applied by each particle to the adjacent particle thereof in the global memory; distributing an individual calculation threading in the GPU for each particle; taking down all stresses of the particles calculated in the threading according to the established multi-body interaction model between the particles; simultaneously storing the stress of each particle to the adjacent particle thereof; reading in the stress of the stored adjacent particle of each particle from the global memory; adding the stresses to the particles with corresponding labels to obtain completed acting force to the particles; and calculating potential energy of each particle on the GPU, outputting the results to the system memory, and carrying out statistics and calculation on the average potential energy of a single particle by CPU.

The invention discloses a three-dimensional dynamic simulation method for a water outlet process of submarine-launched missiles, and relates to a three-dimensional dynamic simulation method. The method aims to solve the problems of complex testing equipment, high testing cost and weak repeatability in the ground simulation tests. The three-dimensional dynamic simulation method for the water outlet process of the submarine-launched missiles is realized based on CPU-GPU isomerous multithreading development environment, and comprises the following contents: (1) a human-computer interaction platform is built; (2) three-dimensional virtual modeling and displaying for the water outlet process of the submarine-launched missiles are implemented; (3) visualization modeling for the water outlet process of the submarine-launched missiles is implemented based on a particle system; (4) visualization modeling for drum vacuole of the submarine-launched missiles is implemented based on coloring language; (5) sea depth staffs are dynamically displayed; (6) multi-view interactive three-dimensional navigation for the water outlet process of the submarine-launched missiles is implemented; (7) key parameters for the water outlet process of the submarine-launched missiles are visualized. The three-dimensional dynamic simulation method has the advantages of safety, economy, controllability, no damage and recycling property, and can be applied in the technical field of computer simulation methods.

The invention relates to a three-dimensional visualized algorithm for maritime oil spill, which is realized in a way that: on the basis of drawing a large-scale sea level scene, dividing an oil spill process within a short time scale into an oil film self-spreading stage and an oil film drift diffusion stage, and calculating the oil spill loci of the two stages respectively by selecting an Lehr model and an oil particle model; simulating the oil particle model by using a particle system; and visualizing the oil spill loci on the simulated sea level by utilizing a planar refraction technology, accessing the veins in a fragment shader of a GPU by projecting vein coordinates, and simulating and reproducing the three-dimensional scene of maritime oil spill while drawing the sea level refraction effect. The algorithm solves the problems of simulation of the oil particle model, visualization of the oil spill loci on the simulated sea level, and the like, and realizes the vivid and visual simulation of the three-dimensional movement change process of oil spill within a short time scale.

The invention relates to a heavy anticorrosion super weatherproof powder coating. The heavy anticorrosion super weatherproof powder coating comprises the following components of: an epoxy resin particle system containing epoxy resin and an adaptive curing agent A and a fluorocarbon resin particle system containing fluorocarbon resin and an adaptive curing agent B, wherein the weight part ratio of the epoxy resin particle system to the fluorocarbon resin particle system is (6-4):(4-6). The heavy anticorrosion super weatherproof powder coating provided by the invention has excellent weatherproof and anticorrosion properties and also can realize automatic stratification after once coating is carried out, and construction is simple.

The invention relates to a boil-resistant polyester powder coating which comprises the following components: a high-acid-value polyester resin particle system containing high-acid-value polyester resin, curing agents A and stuffing A, and a low-acid-value polyester resin particle system containing low-acid-value polyester resin, curing agents B and stuffing B. The curing agents A and the curing agents B are mutually-independent mixed curing agent systems of hydroxyalkyl acidamide (HAA) and isocyanic acid ester. The stuffing A and the stuffing B are mutually-independent aluminum hydroxides or hydrophobic stuffing. According to the boil-resistant polyester powder coating, the hydrophobic stuffing is added into the high-acid-value polyester resin particle system and the low-acid-value polyester resin particle system, so that water permeation is effectively blocked, and therefore the polyester powder coating is protected. The boil-resistant property of the boil-resistant polyester powder coating is even more than that of a polyester powder coating which is curded by means of triglycidyl isocyanurate (TGIC) curing agents.

The invention relates to a crown fire spread three-dimensional visualization method. The crown fire spread three-dimensional visualization method comprises estimating the fireline intensity, the flame length and the spread speed of a crown fire through an FARSITE forest fire spread simulation engine; establishing a fire and smoke particle system through a particle system; establishing a tree three-dimensional model and planting the tree model on a three-dimensional terrain landscape to form a virtual forest environment; customizing vertex shaders and fragment shaders of apparatuses of the model through a programmable pipeline and adopting a texture and color mixture method and an Alpha transparent texture method; setting a simulated starting and ending time, time step and space resolution and estimating a crown fire behavior and a fire field boundary so as to dynamically simulate the dynamic change process of the crown fire in the horizontal direction and the vertical direction. According to the crown fire spread three-dimensional visualization method, the spread process of the crown fire is simulated in a true three-dimensional visual mode and the crown fire spread three-dimensional visualization method can be applied to auxiliary fire-fighting decision, science popularization education, animation, games and the like.

The invention relates to a coating with performances of self-cleaning, heavy corrosion protection and super weather resistance. The coating with performances of self-cleaning, heavy corrosion protection and super weather resistance comprises an epoxy resin particle system which consists of epoxy resin and curing agent A, and a fluorocarbon resin particle system which comprises fluorocarbon resin, curing agent B and TiO2 nanometer particles. The ratio (weight in parts) of the epoxy resin particle system to the fluorocarbon resin particle system is 4-1:1-4. The self-cleaning powder coating with performances of heavy corrosion protection and super weather resistance disclosed by the invention has phase separation during the curing process to form a fluorocarbon face and an epoxy bottom layer, TiO2 nanometer particles only exist in the fluorocarbon face, and photocatalysis decomposition is prevented under the action of TiO2 due to the high chemical stability of fluorocarbon, so that the powder coating has good performances of self-cleaning, heavy corrosion protection and super weather resistance.

The invention belongs to a biodegradable nano-particle bonded with a hemoglobin molecule, and a method for preparing the biodegradable nano-particle. A polyethylene glycol polyester copolymer with such active functional groups as carboxy groups, amino groups, hydroxyl groups, triple bonds and so on in lateral chains is assembled to form micelle, and the micelle is bonded with the hemoglobin molecule; or firstly, the polyethylene glycol polyester copolymer is bonded with the hemoglobin molecule and then is assembled to get a chemical bonded hemoglobin nano-particle system. The size of the nano-particle prepared ranges from 80nm to 800nm. The hemoglobin accounts for 100 to 500 percent of the nano-particle by weight; the viscosity of the solution ranges from 1MPs to 4MPs; the salt content ranges from 50mM to 200mM; the pH value ranges from 7.0 to 7.6; the oxygen Affinity ranges from 6mmHg to 50mmHg; the stable half life of the hemoglobin ranges from 15 to 24 hours. The bonded hemoglobin nano-particle can be used for manual transmission of oxygen, and as an erythrocyte simulator, which can be used for clinical blood transfusion and to cure cardiovascular and cerebrovascular diseases.

A system and method for recovering three-dimensional (3D) particle systems from two-dimensional (2D) images are provided. The system and method of the present invention provide for identifying a fuzzy object in a two-dimensional (2D) image; selecting a particle system from a plurality of predetermined particle systems, the selected particle system relating to a predefined fuzzy object; generating at least one particle of the selected particle system; simulating the at least one particle to update states of the at least one particle; rendering the selected particle system; comparing the rendered particle system to the identified fuzzy object in the 2D image; and storing the selected particle system if the comparison result is within an acceptable threshold, wherein the stored particle system represents the recovered geometry of the fuzzy object.

An architecture tangibly embodied on a computer readable medium, the architecture for creating a particle system to be used in a physical simulation, including: a plurality of particle generation modules, wherein a particle generation module generates particles in a particle system; a plurality of particle motion modules, wherein a particle motion module produces physical motion of particles in a particle system; a plurality of particle display modules, wherein a particle display module renders particles in a particle system; a plurality of target effect modules, wherein a target effect module modifies particles in a particle system to perform in a certain way when they collide with an object; and a plurality of particle data structures.

The invention provides an implementation method and device of particle effects and solves the problem that the larger the number of current frames, the longer time implementation of current frame particle effects takes. The method includes: collecting the number of frames requiring particle effects, and recording as the number of current frames; establishing an update function of a particle system and an update function of an affector; calling a clear function of the particle system, and removing all particles of the particle system; setting emission speed and maximum survival time of the particle system; calling the update function of the particle system to create current frame particles, and modifying the emission speed, maximum survival time and locations of the current frame particles; calling the update function of the affector, and updating parameters of the current frame particles; calling a render function to render the parameters of the current frame particles so that particle effects of the current frame particles are implemented. The method and device has the advantages that the time of implementing the effects of current particles is saved.

The invention discloses a method for synchronous measurement of the optical constant and particle size distribution of spherical particles based on a multi-angle light scattering-transmission process, relates to the technical field of participating medium radiation property measurement and is aimed at solving the problems of great error of experimental measurement value and relatively weak measurement signal in participating medium radiation parameter measurement based on inverse problem solving. The method comprises the following steps: irradiating the surface of a particle system sample by using continuous steady-state laser; arranging optical detectors on different scattering-angle positions; measuring the scattering optical signal intensity and hemispherical transmission signal of the steady-state laser of different angles; and obtaining the optical constant of the spherical particles and the particle size distribution of the particle system in combination with the signals and through the inverse problem solving technology. The method disclosed by the invention is suitable for synchronous measurement of the optical constant and particle size distribution of spherical particles based on a multi-angle light scattering-transmission process.