90 results about "Three dimensional beam" patented technology

The invention relates to an automatic beam and column steel bar joint arranging and constructing simulation method based on a BIM technology. The automatic beam and column steel bar joint arranging and constructing simulation method based on the BIM technology comprises the following steps that three-dimensional beam and column steel bars are formed and arranged by using a preset three-dimensional steel bar joint arranging module in RevitStructure software according to a CAD beam and column structure detail drawing; the arranged three-dimensional beam and column steel bars are freely combined and detached according to construction field situations, components are numbered according to construction procedures, and corresponding construction procedure flow simulation is generated; the arranged three-dimensional beam and column steel bars are transformed into a CAD two-dimensional diagram, and the components are machined according to the CAD two-dimensional diagram; and field construction is guided in a construction field according to the CAD two-dimensional diagram and steel bar construction procedure flow simulation. According to the automatic beam and column steel bar joint arranging and constructing simulation method based on the BIM technology, the deepening time of beam and column steel bar joints is shortened, engineering cost is saved, and workloads are reduced.

The embodiment of the invention provides a codebook feedback method, user equipment and a base station. The codebook feedback method comprises the following steps: a reference signal sent through an antenna array by the base station is measured; according to the measuring result, a precoding matrix is selected from a codebook; multiple codebook indexes corresponding to the precoding matrix are determined; and a precoding matrix indicator PMI corresponding to two of the multiple codebook indexes is determined, and the PMI is sent to the base station such that the base station sends the precoding matrix of data according to the PMI selection. According to the embodiment of the invention, the user equipment sends the PMI corresponding to the multiple codebook indexes to the base station, and the multiple codebook indexes are corresponding to a first parameter in a first antenna direction and a second parameter in a second antenna direction. The base station can utilize the first parameter and the second parameter to form spatial three-dimensional beams in the horizontal and vertical directions. Thus, system performance can be raised.

The invention provides a high-strength bolt strength calculating method of a wind generating set. The high-strength bolt strength calculating method provided by the invention comprises the following steps of: combining a VDI (Virtual Device Interface) 2230 standard and finite element analysis; modeling by using the finite element analysis; setting boundary conditions and obtaining stress increment of a bolt under the external loading effect by solving; and obtaining ultimate strength of the bolt after considering factors in two aspects of influence on the stress by a bolt pre-fastening force supplying manner through the VDI 2230 standard. A screw part is simulated by using a three-dimensional beam unit in a modeling process; and the stress condition is simulated by that a bolt thread part is engaged with a screw hole, and a bolt head and the screw part can be limited by multiple joints. The high-strength bolt strength calculating method is used for reasonably simulating the bolt by more completely considering a comprehensive stress condition of the bolt, can be widely applied to all high-strength bolt strength checks except a tower cylinder connection bolt in the wind generating set, and provides reliable proof for the design of the high-strength bolt.

The invention discloses a design method of seamless turnouts on an elevated station of a longitudinally, transversely and vertically coupled high-speed railway, belonging to the fields of railway engineering technology application and design. The design method comprises the following steps: by considering the factors of the structure of a bridge, the arrangement mode of supporting seats and the structure types of rails and considering the actual conditions of displacement coupling among towing points and the influence of the longitudinal displacement of steel rails on the transverse deformation of tongue rails, making a basic assumption; using three-dimensional beam elements to simulate the steel rails; establishing non-uniform beam elements according to the actual cross sections for tongue rails and point rails; modeling according to the actual cross section attributes for steel rails; and using a finite element method to complete corresponding computational analysis according to different working conditions of the seamless turnouts on the bridge. The invention really reflects the mutual coupling action of the bridge, the rails and the turnouts, obtains more accurate results, meets the actual conditions, has high efficiency and strong flexibility, is suitable for design and computational check of various seamless turnouts or turnout groups on the bridge, and provides a reliable tool for the design of the seamless turnouts on the bridge.

The invention discloses an inter-cell interference coordination method adopting three-dimensional beam forming in a 3D-MIMO (three dimensional multiple-input multiple-output) system. Different types of users distributed in three-dimensional space are dispatched in different time slots, meanwhile, a three-dimensional beam forming transmission technique is used, and inter-cell same-frequency interference borne by the users is greatly reduced. The inter-cell interference coordination method comprises the following steps: (1) an apex angle from each base station to a direct-sight path of each user is calculated according to the distribution of the users in the three-dimensional space, and the users are separated into high-riser users and low-riser users accordingly; (2) the low-riser users are separated into cell edge users and cell center users according to the plane positions of the users in a cell; (3) the time slots of the dispatched users are divided into three kinds, the same kind of users are dispatched by all the base stations in each kind of time slots, the three-dimensional beam forming transmission technique is used to serve the users, power of useful signals received by the users is further increased, and interference is reduced. The inter-cell interference coordination method greatly improves the service quality of the cell edge users while improving the overall network throughput capacity.

The invention belongs to the technical field of radar signal processing, relates to localized suppression processing of radar clutters and discloses a method for partial combination clutter suppression in airborne MIMO radar three-dimensional beam space. The method comprises the steps that firstly, an expression of a space-time data vector x is obtained and a space-time two-dimensional guide vector of a target is established; secondly, an array element-pulse domain of the space-time data vector x is converted into a three-dimensional beam domain through three-dimensional discrete Fourier transform; thirdly, a space-time data vector z generated after dimensionality reduction and a space-time two-dimensional guide vector, generated after dimensionality reduction, of the target are obtained; fourthly, according to a cost function of dimensionality reduction space-time self-adaptive processing, a weight vector of a dimensionality reduction processor is calculated; fifthly, space-time data processed by clutter suppression are obtained through the weight vector of the dimensionality reduction processor. The method can solve the problems of the large operand and large sample requirements and is applied to the scene of radar clutter processing.

A wireless communication system and method generates and shapes one or more three-dimensional control channel beams for transmitting and receiving signals. Each three-dimensional beam is directed to cover a particular coverage area and beam forming is utilized to adjust bore sight and beam width of the three-dimensional beam in both azimuth and elevation, and the three-dimensional control channel beam is identified. In another embodiment, changes in hot-zones or hot-spots, (i.e., designated high volume user coverage areas), are managed by a network cell base station having at least one antenna. Each of a plurality of wireless transmit / receive units (WTRUs) served by the base station use a formed beam based on one or more beam characteristics. When the coverage area is changed, the base station instructs at least one of the WTRUs to change its beam characteristics such that it forms a return beam concentrated on the antenna of the base station.

[Object] To make it possible to reduce an increase in the interference while reducing load involved in beamforming.[Solution] There is provided a communication control apparatus including an acquisition unit configured to acquire cell identification information assigned to an individual three-dimensional beam formed by a directional antenna capable of forming a three-dimensional beam, and a control unit configured to control transmission of a reference signal performed using the individual three-dimensional beam, on the basis of the cell identification information. The control unit controls the transmission so that the reference signal is transmitted in a limited portion of available resource blocks.

The invention relates to a device for the manufacture of three-dimensional beam type elements in composite material with reinforcing fibres preimpregnated with polymeric resins, starting with laminates (21, 22) layed and precut without polymerization, said device comprising a head (15) that comprises in its turn a roller train (17), it being possible for said head (15) to move longitudinally along a fixed bedplate, in such a way that, as said head (15) moves, the roller train acts on the laminates (21, 22) without polymerization, compacting and forming them, thus forming the laminates (21, 22) with their final geometry in one go, in such a way that said laminates (21, 22) are ready for their subsequent integration. The invention also relates to a method of manufacture of three-dimensional beam type elements in composite material.

The invention relates to a method for measuring the refractive index distribution of a transparent medium on the basis of interference fringe image processing, and belongs to the technical field of substance refractive index measurements. The method comprises the following steps: generating an interference fringe image by virtue of the beam splitting surface of a three-dimensional beam splitting prism, and then measuring the refractive index distribution of the transparent medium to be measured by calculating the interference fringe movement number generated by changing the difference between an optical path of an input light transmitting the sample to be measured and an optical path of the input light transmitting a reference medium. The invention also provides a measurement device for realizing the measurement method. The measurement method disclosed by the invention is capable of measuring the refractive index of a uniform transparent medium with higher accuracy, and measuring the refractive index distribution of a non-uniform transparent medium. The measurement method and the measurement device thereof disclosed by the invention further have the advantages of reducing measurement times, shortening measurement time and simplifying data processing on the premise of ensuring measurement accuracy and stability.

The invention discloses a three-dimensional beam string structure. Two adjacent surface structures located at different beam string structures are a surface P and a surface N. Multiple inclined cables are arranged between the surface P and the surface N. The inclined cables are inclinedly arranged relatively to purlines. One end of each one of the inclined cables is hinged to an upper beam of the surface P and the other end of the inclined cable is fixedly connected to a lower end of a support rod of the surface N. Compared with the prior art, the three-dimensional beam string structure improves an inclined cable utilization rate. After the purlines lose efficacy, through connection between the inclined cable and a beam string structure adjacent to the inclined cable, the integrality of the three-dimensional beam string structure does not disappear immediately; collapse resistance is improved; continuous collapse is prevented; potential safety hazard is eliminated; and the structural integrality is greatly improved. The inclined cables can effectively solve the problem that out-of-plane unstability is produced after efficacy losing of inhaul cables at a side of a bottom chord of the existing beam string structure.

The invention discloses a BIM technology-based hyperbolic curtain wall construction method. The method comprises the following steps of: creating a three-dimensional beam column model of a hyperbolic curtain wall by utilizing Autodesk Revit software of BIM; creating a corresponding relationship between embedded parts and keels of the hyperbolic curtain wall in the three-dimensional beam column model, and carrying out relationship positioning on the keels and embedded parts at different positions; dividing unit modules on the surface of the hyperbolic curtain wall, and establishing a surface model for each unit module by utilizing the Autodesk Revit software; and importing the surface models, the three-dimensional beam column model, the embedded parts and the keels into Navisworks software to carry out mounting simulation. According to the method, the problems that the aluminum plate curtain wall material production and machining difficulty is large, the plate material sizes are difficult to calculate, the keel modeling is complicated and the scene keel positioning is difficult as hyperbolic cambered surface models are applied in projects in large areas can be solved through a BIM technology.

The invention provides methods for constructing a three-dimensional multi-input multi-output (MIMO) precoding matrix array and feeding back an index value of the three-dimensional multi-input multi-output precoding matrix array, and related communication equipment. The method for constructing the three-dimensional multi-input multi-output precoding matrix array comprises constructing a first component matrix in a block diagonal matrix form, constructing a second component matrix comprising a phase positionweighting factor as a matrix element, and constructing the precoding matrix according to the constructed first component matrix and the constructed second component matrix, wherein a diagonal sub-matrix of the first component matrix is a three-dimensional beam forming sub-precoder of a two-dimensional array antenna, and the phase position weighting factor characterizes the coherent combination of a signal of the two-dimensional array antenna. The method for feeding back the index value of the three-dimensional multi-input multi-output precoding matrix array comprises estimating a multi-input multi-output channel, and selecting and feeding back a first index value, a second index value and a third index value according to the estimated result of the channel.

The invention discloses a beam forming method, communication stations and mobile stations. The beam forming method, the communication stations and the mobile stations are applied to a wireless communication system comprising a plurality of collaborative cells. The beam forming method comprises the steps of enabling the communication station of every collaborative cell to determine weight of three-dimensional beam forming according to pitch angle instruction information and first channel information coming from the communication station of the cell and pitch angle instruction information and second channel information coming from the communication stations of other collaborative cells; and enabling the communication station of every collaborative cell to perform weighting processing on to-be-sent data according to the weight, and sending the data to the mobile station of the cell. By applying the beam forming method, the problems that two-dimensional beam forming cannot be used for distinguishing processing of the mobile stations with different pitch angles and feedback quantity is large in the prior art are solved, co-channel interference of different mobile stations is reduced while the feedback quantity is reduced, and system performance is improved.

The invention discloses a focused ion beam-electron beam fused controllable micro-nano machining method, which is to obtain three-dimensional beam current density distribution of the ion beam and the electron beam respectively by comprehensively considering aberration and space charge effect of an actual system, and fuse the two beams according to the spatial layout of the system to synthesize a synchronous particle beam, so as to obtain high-precision two-beam fused controllable micro-nano machining. The method comprises the following steps: at first, obtaining parameters of a source, a lens, a deflector and a sample, and calculating two-dimensional fields, three-dimensional fields and electrical parameters of the lens and the deflector; then, under a given initial condition, solving Newton-Lorentz equation set to obtain ion (electron) beam three-dimensional beam current density distribution containing aberration and ion (electron) coulomb force effect; at last, under the condition of considering a two-beam system assembling structure, rotating the ion beam anticlockwise, fusing the ion beam and the electron beam under the coulomb force effect, so as to realize two-beam synchronous controllable machining. The method has the advantage that the machining precision and quality can be improved as the electron beam controls the ion beam current density distribution.

The invention relates to a processing device and method for preparing silver paste electrode by laser-induced forward transferring printing and sintering. The device is characterized in that a first beam expander and a second beam expander are sequentially arranged on an output laser path of a laser pulse, wherein a three-dimensional beam splitter mirror, a polarized wave plate, a polarized beam splitting plate, a second reflector, a diffractive optical element, a scanning galvanometer and a field lens are sequentially arranged on a reflecting laser path of the first reflector; a laser path output end of the field lens face a carrying unit; a second beam splitter mirror and a reflector are sequentially arranged on an output laser path of a continuous laser; a reflecting laser path of the reflector is corresponding to the three-dimensional beam splitter mirror and is reflected to the three-dimensional beam splitter mirror; the laser reflected by the three-dimensional beam splitter mirror is overlapped with a laser path transmitted by the pulse laser; an upper bearing plate and a lower bearing plate of the carrying unit are of hollow structures and are connected through a distance adjusting mechanism; a transparent substrate coated with a silver paste layer is reversely buckled to the hollow part of the upper bearing plate; and a product substrate is arranged in the hollow part of the lower bearing plate. According to the processing device and method, an electrode with high silver paste height-width ratio can be manufactured by the laser forward transferring and printing technology.

The invention discloses a construction method of a three-dimensional digital beam field, and belongs to the technical field of informatization management. The method comprises the following steps: constructing a three-dimensional geographic information GIS model of a beam field based on a GIS technology; constructing a BIM model library based on a BIM technology, wherein the BIM model library comprises a basic model and a component model; correspondingly associating the basic model and the component model with infrastructures, tooling equipment, pedestals, personnel and components in a beam field; collecting beam field production information; and loading a basic model, loading a corresponding component model at a corresponding position in the three-dimensional geographic information GIS model based on the beam field production information, performing updating according to a preset rule, and sending the information to a display terminal. According to the method, the real scene of the beam field can be simulated through the constructed three-dimensional beam field BIM model and the constructed three-dimensional geographic information GIS model, and the models are correspondingly associated with components in the beam field.

A three-dimensional light beam acquisition apparatus includes an imaging optical system and an illumination optical system. The imaging optical system includes a first optical element that allows to pass through light from a subject; a second optical element that is arranged on the optical axis of the first optical element, receives the light from the first optical element, and forms an image corresponding to received light; and an acquiring unit that acquires the image from the second optical element as light beam information. The illumination optical system includes a light source; and a third optical element that collects illumination light from the light source and irradiates the subject with the illumination light through the first optical element.

Systems and methods provide a novel computational approach to planning the endovascular treatment of cardiovascular diseases. In particular, the invention simulates medical device deployment and hemodynamic outcomes using a virtual patient-specific anatomical model of the area to be treated, high-fidelity finite element medical device models and computational fluid dynamics (CFD). In an embodiment, the described approach investigates the effects of coil packing density, coil shape, aneurysmal neck size and parent vessel flow rate on aneurysmal hemodynamics. A processor may receive patient clinical data used to construct the relevant anatomical structure model. The processor may access medical device models constructed using finite element analysis and three dimensional beam analysis, and simulates the deployment of selected medical devices in the anatomical structure model. The selected medical device models and the anatomical structure model mesh, allowing the processor to simulate hemodynamic outcomes using computational fluid dynamics.

Three dimensional beam forming X-ray source includes an electron beam generator (EBG) to generate an electron beam. A target element is disposed a predetermined distance from the EBG and positioned to intercept the electron beam. The target element is responsive to the electron beam to generate X-ray radiation. A beam former is disposed proximate to the target element and comprised of a material which interacts with the X-ray radiation to form an X-ray beam. An EBG control system controls at least one of a beam pattern and a direction of the X-ray beam by selectively varying a location where the electron beam intersects the target element to control an interaction of the X-ray radiation with the beam-former.

A calculation method for checking ultimate strength of a fan underframe includes: using finite element analysis software as a platform for modeling, performing finite element meshing, setting connecting structure load and boundary conditions, and calculating to obtain stress condition of the underframe. The step of setting the connecting structure load and boundary conditions includes: establishing nodes at the center of a hub and at the center of a bearing, connecting the nodes through a three-dimensional beam unit, and simulating spindle transfer load. A central point of a main bearing block is connected with an inner ring surface unit of the main bearing through a link unit which bears only pressure. The method has the advantages that calculated stress of the underframe and calculated danger positions are more accurate and the actual stress relation of the underframe is satisfied.

The invention discloses a three-dimensional beam forming space division multi-access adaptive transmission method adopting statistic channel state information. The method aims at increasing the spectrum use rate of a communication system and improving the power efficiency of the communication system. The method specifically includes the steps that for an FDD system, each user calculates statistic channel state information of the user according to a channel estimated result, the statistic channel state information refers to a main perpendicular mode, a main horizontal mode and corresponding indexes and is fed back to a base station; for a TDD system, the base station uses an uplink channel estimated result for calculating downlink statistic channel state information of the users; the base station selects two groups of service users according to the acquired statistic channel state information and conducts pre-code transmission on the two groups of users in two time slots. According to the three-dimensional beam forming space division multi-access adaptive transmission method adopting the statistic channel state information, system robustness is effectively improved and the high average mutual information quantity can be acquired with low calculation complexity.

The invention provides a weight obtaining method of three-dimensional beam forming. The method includes: obtaining a whole information channel coefficient matrix between a communication station and a mobile station; extracting an information channel coefficient matrix of each dimension according to the whole information channel coefficient matrix, and calculating the weight of each dimension according to the information channel coefficient matrix of each dimension; and processing the weights of all the dimensions to obtain the weight of the three-dimensional beam forming. The invention further provides a weight obtaining device of the three-dimensional beam forming. Through the layering mode, the complexity of obtaining the weight of the three-dimensional beam forming is reduced, performance of a wireless communication system is improved, and coverage range of the wireless communication system is widened.

The embodiment of the invention relates to the field of wireless communication, and in particular relates to a method and device for determining three-dimensional beam pre-coding information, used for performing three-dimensional beam forming. In the embodiment of the invention, network equipment determines an optimal first beam forming vector at first; then, an optimal second beam forming vector is determined from a second beam forming vector set corresponding to the optimal first beam forming vector; and channel measurement is carried out through a formed pilot frequency, such that optimal pre-coding information in the second dimension is determined. The optimal beam forming vector is determined from the beam forming vector set based on the coarse granularity at first; then, the optimal beam forming vector is determined from the beam forming vector set based on the fine granularity; therefore, the purpose of determining the optimal fine-granularity beam forming vector and the optimal pre-coding information can be achieved without measuring all fine-granularity beam forming vectors; compared with the prior art, the system resource cost is reduced; and thus, the complexity of the terminal is reduced.

The invention discloses a method for designing three-dimensional beam forming in a multi-user 3D-MIMO system. The method comprises the following steps that first, the probability density function of the vertex angles from a base station to user direct vision diameters is calculated according to a distribution model of users in a 3D scene, and a multi-user scheduling algorithm in the multi-user 3D-MIMO system is designed according to the probability density function of the vertex angles; second, when the base station sends signals to the users, each antenna port in a configured planar antenna array serves one individual user, precodes applied to all the antenna ports are precodes suggested in the 3GPP standard, and the served users are selected from all the users through the multi-user scheduling algorithm; third, configuration of the planar antenna array of the base station is decided by the designed multi-user scheduling algorithm, an electronic downward inclination angle used in each precode applied to the corresponding antenna port is decided by the adopted configuration of the planar antenna array, and the throughput of the system is maximized finally. The method greatly improves the overall performance of the 3D-MIMO system.

A detachable three-dimensional beam column structural method belongs to a building technology. According to the principle of steady and reliability and convenient disassembly and assembly, junctions are divided into a plurality of mutually-engaged units and respectively arranged on each beam column and bolt locks, buckle locks and anchor ears are arranged, so a beam column structural method of mutually-locked tongue and grooves with respective codes is formed. The detachable three-dimensional beam column does not need screws and nuts and welding, can be freely disassembled and assembled and repeatedly used, has the characteristics of light weight, high intensity and working efficiency, expense saving, steady and reliable structure, energy saving and environmental protection and is suitable for building various temporary facilities in the construction field, temporary scenes, retaining walls, viewing decks, billboards, and the like.

An ultrasonic diagnostic apparatus either for displaying three-dimensional ultrasonic images allowing an operator to become aware of the distance of a target object from an ultrasonic probe (1), or for displaying practical three-dimensional ultrasonic images while being simply structured and taking a short time to perform necessary operations. The apparatus comprises: an ultrasonic beam data memory (5) for storing B-mode ultrasonic beam data or CFM ultrasonic beam data; an address control unit (6) for sequentially writing and reading the ultrasonic beam data to and from the ultrasonic beam data memory in the direction of depth; a three-dimensional operation unit (7) for generating three-dimensional ultrasonic beam data using the ultrasonic beam data read from the ultrasonic beam data memory by the address control unit; a three-dimensional ultrasonic beam data memory (8) for storing the three-dimensional ultrasonic beam data thus generated; a DSC (digital scan converter) (9) for converting the three-dimensional beam data to a display-ready format; and a CRT (10).

The invention provides an indoor three-dimensional positioning method based on distributed antennas. The method realizes indoor real-time space positioning by utilizing the distributed antennas and combined with a three-dimensional beam. A distributed antenna set effectively improves system coverage, and power distribution in a coverage area can be adjusted through distribution of the antenna set,thereby reducing average transmitting power of the terminal; antenna units are scattered in a cell, thereby shortening average access distance, and reducing path loss; in a 3D precode construction method based on antenna downward inclination angle correction, the calculated precode comprises horizontal dimension and vertical dimension channel information, and influence of the downward inclinationangle, thereby effectively suppressing interference and improving overall system performance; wave beam in the vertical dimension is increased, thereby improving useful signal reception power of a terminal to be positioned, increasing coverage space, and realizing a better anti-indoor-multipath effect; and a centroid space coordinate estimation method based on sphere center-circumcenter connection line intersection point and distance weighing is high in accuracy and easy for engineering realization.