48 results about "Free model" patented technology

A method for uncertainty estimation for nonlinear inverse problems includes obtaining an inverse model of spatial distribution of a physical property of subsurface formations. A set of possible models of spatial distribution is obtained based on the measurements. A set of model parameters is obtained. The number of model parameters is reduced by covariance free compression transform. Upper and lower limits of a value of the physical property are mapped to orthogonalspace. A model polytope including a geometric region of feasible models is defined. At least one of random and geometric sampling of the model polytope is performed in a reduced-dimensional space to generate an equi-feasible ensemble of models. The reduced-dimensional space includes an approximated hypercube. Probable model samples are evaluated based on data misfits from among an equi-feasible model ensemble determined by forward numerical simulation. Final uncertainties are determined from the equivalent model ensemble and the final uncertainties are displayed in at least one map.

The invention provides a gradient tungsten-copper composite. The gradient tungsten-copper composite comprises tungsten frameworks manufactured through an electron beam selective melting forming method and copper filling phases manufactured through an infiltration method. The tungsten frameworks are arranged in many layers in the height direction of the tungsten frameworks, and each layer of tungsten framework is of a net-shaped porous structure. Pores of the tungsten frameworks on all the layers are filled with the copper filling phases, and the volume percentage compositions of the copper filling phases are increased or decreased layer by layer. The invention further provides a method for preparing the gradient tungsten-copper composite. The tungsten frameworks in the tungsten-copper composite are prepared through the high-energy electron beam selective melting technology, and the structural strength of the tungsten frameworks is obviously higher than that of a structure prepared through a traditional sintering method; and the copper filling phases can be prepared by means of free model adjustment and combination with the copper infiltration technology, and finally flexibility and controllability of the structure and performance of the tungsten-copper composite can be achieved.

A received signal strength (RSS) predictor of a propagation-free model is trained based on a large number of actual network data sets, and the coverage performance of base station (BS) deployment is optimized through a multi-target heuristic method. In particular, more practical features of signal propagation, such as geographical environment and operating parameters of a base station, are fed into a machine learning (ML) model to predict received signal strength; besides, a multi-objective greedy algorithm is designed based on the prediction model, a feasible solution is initialized to meet geographical constraints and is fixed to be related to longitude and latitude of an optimization area, the optimization step length in the search direction is fixed, the step length is set according tothe upper limit and the lower limit of parameters, and the optimization objective is that the coverage rate reaches the standard with the least base stations. Numerical simulation results show that the multi-layer perceptron is superior to other machine learning algorithms in the aspect of received signal strength prediction, convergence and availability of the method are verified through base station deployment simulation, the coverage rate is better than that of actual deployment, and the number of base stations needing to be deployed is smaller.

The invention discloses a water surface aircraft water load full-aircraft power-free model pool test method. A test includes the following steps that firstly, full-aircraft power-free model test installation is performed; secondly, a full-aircraft power-free model pool test is performed, an electric cylinder (2) is started, an electromagnetic throwing device (3) is turned on, a full-aircraft power-free model (9) is thrown on the water surface at a constant vertical speed, the trailer speed, the water touching angle of the model, the overload and the pressure value are recorded at the same time, the water touching conditions of the model are recorded, and the loaded conditions of the model after the model touches the water are analyzed according to the model postures, the overloads and the pressure values of different test states. The water surface aircraft water load full-aircraft power-free model pool test method has the advantages of being practical, feasible, easy to operate, reliable in test result and wide in application range.

The invention relates to a full-aircraft power-free model basin test method for wave resistance of a water surface aircraft. The test step includes a) full-aircraft power model testing and installation: a full-aircraft power-free model (1) is installed on an airworthiness instrument (8) which is under a hydrodynamic force high-speed test trailer system (12) through a sliding device, the sliding device ensures that the full-aircraft power model (1) can move up and down in a certain range and freely move forwards and backwards along the airworthiness instrument (8), a gravity center support rod(7) is movably connected with the full-aircraft power-free model (1), a movable connection point of the gravity center support rod (7) and the full-aircraft power-free model (1) should take a gravitycenter position point of the full-aircraft power-free model (1), a hinge is adopted for a hinge joint, and the full-aircraft power-free model (1) can freely perform pitching rotation around the gravity center position point. The full-aircraft power-free model basin test method for wave resistance of a water surface aircraft has the advantages that the method is practical, feasible and simple to operate, a test result is reliable, and the range of application is wide.

The invention discloses a grid-free model based module-to-module wiring method of an integrated circuit from a, aiming at finding a shortest wiring path of the integrated circuit and enhancing wiring efficiency. The wiring method comprises the following steps of: establishing an obstacle list according to read obstacle information, transforming each polygonal obstacle of the obstacle list into a rectangular obstacle, and also extending the boundaries of the rectangular obstacles to form a two-dimensional nonuniform grid array; then respectively transforming a starting module and a finishing module into a starting point set and a finishing point set; carrying out path searching by adopting an A* algorithm; and finally outputting a searching result. The invention can find the shortest wiring path of the integrated circuit and has high wiring efficiency.

The invention discloses a device for analyzing stress conditions of a test model in a circulating water channel. The device comprises a hanger, a junction box, a pair of guide shafts, a base, and a five-component balance device. The upper ends of the guide shafts are mounted on the lower surface of the hanger through guide shaft supports, and the lower ends of the guide shafts are mounted on the upper surface of the base. The five-component balance device is mounted on the upper surface of the base and connected with the junction box. A force transmission bar penetrating a base guide cover connecting disk is mounted at the bottom of the five-component balance device. The device is light in weight and high in response speed, allows electrical signals to be transmitted easily, allows hydrodynamic test measurement to be automated, is small in size, can be used to measure hydrodynamic force and torque acting on the full model, and can also be used to measure hydrodynamic force and torque acting on a part model or hanger-free model.

The invention relates to a method for predicting the dynamic behaviour of an aircraft structure, said aircraft comprising at least one rotary device including at least one rotor (11) guided in rotation by at least one fixed-bracket bearing (17, 18) containing a shock-absorbing fluid film (24), wherein said method comprises using a global digital model of the aircraft structure including a basic digital model of each rotary device, generating a non-linear digital model of each shock-absorbing film (preferably by developing a cavitation-free model and a model with cavitation), integrating the model of each shock-absorbing film with the global model, applying interference to at least one rotor of a rotary device, calculating the vibration frequency of at least one rotor of each rotary device and the corresponding frequency of the vibrations generated in a critical portion of the aircraft structure.

Computing device, computer instructions and method for de-ghosting seismic data related to a subsurface. The method may include receiving input seismic data recorded by seismic receivers that located at different depths (z_r), generating migration data (du) and mirror migration data (dd) from the input seismic data, deriving a ghost free model (m) based on simultaneously using the migration data (du) and mirror migration data (dd), generating primary (p) and ghost (g) datasets based on the ghost free model (m), simultaneously adaptively subtracting the primary (p) and ghost (g) datasets from the migration data (du) to provide adapted primary (p′¹ and p′²) and adapted residual (r′¹ and r′²) datasets, and generating a final image (f) of the subsurface based on the adapted primary (p′¹ and p′²) and the adapted residual (r′¹ and r′²) datasets. In certain embodiments, the input seismic data d includes both hydrophone data and particle motion data.

The invention discloses a rapid weight-coefficient-free model predictive control calculation method and system. The relative relation between positive and negative bus voltages in a present period is determined; a sector, in which a reference voltage vector of the present period is positioned in a voltage space vector, and M first voltage vectors in the sector are determined; according to the voltage vector and the correspondence table of the positive and negative bus voltages obtained in advance, N second voltage vectors whose relative relation between the positive and negative bus voltages is opposite to the relative relation of the present period are selected from the M first voltage vectors; N objective function values are obtained according to the N second voltage vectors and an objective function relation respectively, and a second voltage vector corresponding to the minimal objective function value serves as the voltage vector of an inverter of a next period; and the objective function relation does not include a weight coefficient. According to the method and system of the invention, the objective function relation is simplified, the calculation process is simple, the amount of voltage vectors to be measured can be further reduced, and the calculation process is simplified.

A method of and system and article of manufacture for creating a network and service inventory data model that does not constrain entities in the inventory or any relationship between entities, the method including modeling the entities, relating a first entity to a second entity via a join table, associating a label for a rule(s) and/or behavior(s) associated with an entity type of any of the modeled entities, decoupling metadata from the rule(s) and/or behavior(s), and implementing the rule(s) and/or behavior(s) associated at the entity type.

The invention belongs to the technical field of hydrodynamic tests of water surface aircrafts such as amphibious aircrafts and sea planes, and relates to a water surface aircraft wave-striking load full-aircraft power-free model pool test device. The device can ensure that the roll angle, trim angle and relative position of the model do not change, force and moment in three directions of the center of gravity of the model can be measured, a vertical stress situation at a vertical tail of the model can be measured, a water surface condition of the model in the test process is recorded through image pick-up systems installed in front of and behind the model, thereby providing support for subsequent analysis of a splashing situation of the model, and at the same time, the device is simple toadjust and easy to operate.

Computing device, computer instructions and method for jointly deghosting first and second 3-dimensional (3D) seismic vintages of a same subsurface. The method includes receiving the first 3D vintage; receiving the second 3D vintage, wherein the second 3D vintage is taken later in time than the first 3D vintage, over the same subsurface; jointly deghosting the first and second 3D vintages based on a common ghost-free model U₀, a first vintage ghost-free model U_b, and a second vintage ghost-free model U_m; and generating an image of the subsurface indicative of changes between the first and second 3D vintages based on the common ghost-free model U₀.

The invention relates to an implementation method for improving the simulation efficiency of an incompressible water body based on IISPH (International Mobile Platform Hierarchical Hierarchy). The method comprises the following steps: firstly, a speed non-divergence model is introduced into an IISPH, and a divergence error of a speed field in each time step length of the IISPH method is corrected;Secondly, through the improved density constant model, the density constant model and the speed divergence-free model share calculation factors, and efficient simulation of the incompressible water body is achieved. By introducing a divergence-free speed model, divergence error correction is realized, and the problem that the density error is continuously increased along with time is solved; By improving the density constant model, the calculation factor sharing of the speed divergence-free model and the density constant model is realized, and the problem of redundant calculation is solved. According to the method, the real-time simulation speed of 30.10 frame/second under the 17k particle scale can be achieved, and Compared with the PCISPH (Predictive- Corrective Incompressible SPH) method, the simulation efficiency is improved by 24.17%; compared with the IISPH method, the simulation efficiency is improved by 16.21%.

A device for determining the surface defects of a product includes a base, a support member, a platform, a lighting unit, an image capturing unit, and a processing unit. The lighting unit includes a driving unit, a frame and a number of light sources. The light sources are mounted along the frame. The driving unit drives the frame to move in six degrees of freedom, the light sources emitting light to illuminate the product in different directions. The image capturing unit captures images of the product on the base. The captured images of the product are analyzed and matched against similar views of a blemish-free model product, any discrepancies leading to a determination that the product has any surface defects.

The invention relates to a self-cooling type multi-stage evaporation and refrigeration method, and belongs to the field of air conditioning, energy conservation and environmental protection. According to the invention, the multi-stage indirect evaporation and direct evaporation processes are combined, and temperature of supply air is gradually reduced to the design state; the evaporation and refrigeration efficiency is greatly improved, temperature of the supply air is lower than the initial wet bulb temperature and approaches to the initial air dew point temperature; the refrigeration energy efficiency ratio reaches to 40 kw/kw, and the multi-stage indirect evaporation wet bulb efficiency reaches to 110%; the multi-stage combined evaporation wet bulb efficiency reaches to 130%, and supply air can be adjusted to humidification-free model or little humidification mode as per the use requirement; and the difficult problem of mass humidification in the single direct evaporation and refrigeration technology is effectively solved, and a novel energy-saving and environment-friendly approach with circulatory and reproducible energy is provided for the evaporation and refrigeration field.

The invention provides an information processing method and system based on knowledge coding. The method comprises the following steps of: performing classification, logic and other processing on thehumanistic science knowledge by referring to a computer composition mode and an instruction implementation method to obtain a conflict-free model graph, and encoding the operation modes of the humanistic science knowledge and knowledge processing and performing mathematical operation on the basis of the conflict-free model graph. According to the invention, through knowledge model construction andalgorithm design, coding of humanistic science knowledge and program design are realized; according to the method, the processing efficiency of humanistic science knowledge can be improved, system resources and user time can be saved, more humanistic knowledge can be brought into a conflict-free knowledge graph model in a short time through rapid coding, knowledge is rapidly expanded, and intelligent information base system construction is facilitated.

The invention discloses a basement pipeline arrangement mode based on a BIM technology, and relates to the technical field of pipeline installation in building construction. The method comprises the steps of designing a drawing, building a model, adding a univariate building model, building the whole univariate building model and the like, rationality, feasibility and safety checking is conductedon the model at the end of each step, and error-free model manufacturing and pipeline arrangement of the BIM technology are achieved. In addition, the whole manufacturing design process of pipeline arrangement is optimized by introducing a univariate mode, the frequency of high operation and complicated operation occurring when the BIM technology is applied is reduced, and the BIM design difficulty is reduced.