226 results about "Local structure" patented technology

The invention provides an underwater explosion hull local structure damage assessment method, and relates to the technical field of data processing. The method comprises the following steps: acquiring underwater explosion working condition parameters, wherein the working condition parameters comprise a charge TNT equivalent and an explosion position; obtaining hull structure data; according to the working condition parameters and the ship body structure data, based on an equivalent simulation method, the initial damage degree of the ship body under the underwater explosion effect is calculated; determining the ship body area with the initial damage degree greater than the preset damage degree as a key local area; and according to the working condition parameters and the structural data of the key local area, the accurate damage degree of the key local area of the ship body under the underwater explosion effect is calculated based on a finite element analysis method. According to the method, fine finite element analysis can be carried out on a key local area with a large initial damage degree, the fine and accuracy of local structure damage evaluation are improved, simulation does not need to be carried out on the whole ship body every time, and the complexity and time consumption of simulation are reduced.

The invention discloses an inductive process mining method and system based on local structure optimization. The method comprises the following steps: acquiring an event log executed by an actual business process; mining an original process tree model from the event log, searching and identifying an inaccurate structure in the original process tree model, and extracting a corresponding sub-log; iteratively optimizing the inaccurate structure in the sub-log to obtain a new sub-structure set; the new substructure set is combined by a Cartesian product to obtain a new substructure combination, a new substructure in the new substructure combination replaces a corresponding inaccurate structure in the original process tree model to obtain a result process tree model, the result process tree model is converted into a Petri net model, quality indexes fit and precision of the model are evaluated, a comprehensive quality index F-measure is calculated, and a final process tree model is obtained. And finally, selecting a Petri net model with the highest F-measure as output. According to the method, the model mining efficiency is improved, possible losses are reduced, and it is guaranteed that the high-quality structure is not affected while the inaccurate structure in the process model is improved.

The invention discloses a laser powder bed fusion preparation method suitable for local structure regulation and control of complex parts and application. The invention belongs to the technical field of metal additive manufacturing. The method aims at solving the technical problems that an in-situ heat treatment process after powder single-time fusion forming at present is not suitable for regulating, controlling and improving local structures of complex parts, and shrinkage cracks appear after solidification. The method comprises the following steps: repeatedly building 1-4 three-dimensional models by adopting software, superposing the models, and endowing each model with a group of scanning parameters; and repeatedly scanning layer by layer according to the established model by adopting a laser powder bed fusion technology. According to the invention, transformation of columnar crystal orientation isometric crystals is realized. And meanwhile, cracks formed by solidification and shrinkage can be fed, and a crack-free and compact printing component is prepared. And the forming process is simpler and more convenient, and the method is widely applied to the field of forming complex alloy parts and suitable for industrial production.

The invention provides a finite element analysis method for contact of a grillage structure and a single structure, which comprises the following steps of: dividing a contact area of the grillage structure and the single structure into grids, and then stretching each grid of the grillage structure in the contact area into a columnar unit in a direction far away from the grillage structure, in other words, a single structure is dispersed into a plurality of columnar units, the columnar units are spring units or beam units, finally, loads are applied to the ends, away from the grillage structure, of the columnar units, and the structural response of the grillage structure under the action of the loads is obtained. By dispersing the single structure into the spring units or the beam units, the situation that different areas of the grillage structure have different contact rigidities and the single structure can be effectively simulated on the premise of still using statics analysis, the accuracy of local structure simulation is improved, and powerful technical support is provided for actual production and construction.

The present invention relates to the field of centrifuge structure, and specifically discloses a roll frame for a high-g value three-degree-of-freedom centrifuge, comprising a frame, wherein the frame is an octagonal annular cavity surrounded by an outer skin outer ring, an inner skin inner ring and a cover plate; the frame is symmetrically provided with two roll axis mounting holes, wherein a small shaft sleeve is provided in the roll axis mounting hole, and the side wall of the frame perpendicular to the line connecting the two roll axis mounting holes is provided with two pitch axis mounting holes, wherein a large shaft sleeve is provided in the pitch axis mounting hole; and a plurality of threading tubes are provided in the cavity between the outer skin and the inner skin. The advantages of the present invention are that the roll frame's outer shape structure, box cross-sectional structure, local structure and wiring method are improved and designed to improve the roll frame's overload resistance, rigidity and load-bearing capacity, and reduce the eccentricity of the roll frame, so that it can be used in a high-g value three-degree-of-freedom centrifuge.

The invention discloses an in-situ control device and method for inhibiting metal additive manufacturing cracking, and belongs to the technical field of metal additive manufacturing. According to the device, the two propelling structures are arranged on the two sides of the core base plate with the transverse gap, the two propelling structures make contact with the core base plate from the two sides of the core base plate correspondingly, so that in the additive manufacturing process, the two propelling structures assist in extruding shrinkage of the core base plate from the two sides of the core base plate; and it is ensured that the shrinkage speed of the core substrate can be matched with the shrinkage speed required by the formed part. The device disclosed by the invention is a device for regulating and controlling the local structure deformation of the substrate in situ, and the local deformation of the substrate is regulated and controlled in real time in the additive manufacturing process, so that the distribution and evolution of a stress field are regulated, the tensile stress is successfully converted into the pressure stress, and the generation and expansion of cracks are effectively inhibited.

The utility model discloses a general seat storage and transportation plastic tray which comprises a tray body, an RFID chip, a supporting rod and a positioning block, the tray body and the RFID chip are connected into a whole through a fastener, the tray body and the positioning block are connected into a whole through a fastener, the tray body is formed by an upper sheet and a lower sheet in a thermocompression mode after being subjected to plastic suction forming, and before the upper sheet and the lower sheet are subjected to thermocompression, the supporting rod is arranged on the supporting rod. The tray body and the positioning blocks are produced through the double-layer plastic uptake forming technology and the injection molding technology respectively, the supporting rods are embedded in the tray body, and therefore the bearing capacity of the tray body is enhanced. Seat trays with different sizes, different local structures, different positioning block placement positions and different supporting rod arrangement positions can be designed according to requirements, and then the positioning blocks are connected through fasteners to form the complete seat tray in a combined mode.

Proposed is an arrangement of local structures for TLP-type floating offshore wind turbine platform stress distribution and strength enhancement, the arrangement being characterized in that a plurality of supporting members of which at least one is elongated in a different direction protrudes from the bottom plate of a node, so the top plate of the node to which load is applied by a wind turbine is supported by the supporting members, stress is distributed, and damage to the top plate is prevented such that the wind turbine can be stably supported through the node.

The invention belongs to the technical field of micro-electro-mechanical systems, and particularly relates to an MEMS device with an ultra-thick structure and an ultra-small structure gap and a processing method. The MEMS device comprises a cover plate (333), a silicon structure layer (201) and a silicon through hole sheet (111) which are formed by bonding, a second cavity (28) is manufactured to change the thickness of a movable structure by means of photoetching and etching on the back surfaces of areas of a thin movable structure (24) and a small structure gap (23) of the silicon structure layer (201), a large structure gap (27) and the small structure gap (23) are simultaneously realized by photoetching and etching on a non-pattern surface of the silicon structure layer (201), and the thickness of the large structure gap (27) and the small structure gap (23) is changed by means of photoetching and etching on the back surfaces of areas of the thin movable structure (24) and the small structure gap (23). And the influence of the lag effect is effectively eliminated. By changing the thickness of the local structure layer and simultaneously solving the problems that the etching depth-to-width ratio is difficult to increase and the structure gap is limited by the etching depth-to-width ratio in the processing process of the super-thick structure, the size of the minimum structure gap in the super-thick structure is further reduced, and the driving and detecting capabilities of the capacitive MEMS device are remarkably improved.

The embodiment of the invention discloses a table view rendering method and device, electronic equipment and a storage medium. The method comprises the steps that a table view rendering instruction is received; under the condition that the local structure information corresponding to the rendering instruction is not requested, requesting the local structure information from a server; wherein the local structure information comprises local grouping node information and recording node information; under the condition that the view structure of the table view is not constructed, newly building a view structure, and setting nodes of the view structure according to the requested local structure information; under the condition that a view structure of the table view is constructed, nodes of the view structure are updated according to the requested local structure information; and rendering the view structure in the interface window. The rendering efficiency of the table view can be effectively improved.

The invention discloses a method for determining the importance degree of seepage monitoring points of an earth and rockfill dam and application of the method. The method comprises the following steps that six seepage safety parts of the earth and rockfill dam are recognized, wherein the six seepage safety parts comprise a dam body, an anti-seepage body area, an inverted filtration drainage area, a dam penetrating building area, a dam foundation and a bank slope area; constructing an earth and rockfill dam seepage Bayesian network according to a historical monitoring text, and calculating importance degrees of six seepage safety parts; acquiring three-dimensional space coordinates of the seepage monitoring points: stake numbers, wheelbases and elevations; calculating the comprehensive importance degree of each part to each section of the monitoring point; and superposing the comprehensive importance degrees of the cross sections in the transverse, longitudinal and horizontal directions to obtain the importance degrees of the monitoring points. According to the method, historical monitoring text mining, a Bayesian network probability model and a three-dimensional space attenuation algorithm are coupled, and the importance degree of a quantitative measuring point is calculated, so that the problem that a traditional method depends on experience and neglects local structure defects is solved; and the high-weight section automatically triggers special inspection of the corresponding seepage safety part, so that timely further disposal is facilitated, and the safe operation life of the dam is effectively prolonged.

This invention discloses a graphical real-world block programming monitoring method and system, relating to the field of children's programming. The method includes: acquiring the outline features of variable blocks, condition blocks, loop blocks, operation blocks, and logical judgment blocks; acquiring at least one basic local structure of the block programming, and pre-acquiring test data and result data of the basic local structure; determining whether the block programming has completed the actual local structure; calculating the overlap ratio between the feature local structure and the basic local structure to be identified; selecting the basic local structure to be identified with the largest overlap ratio as a similar local structure of the feature local structure; acquiring test data and result data of similar local structures; obtaining the target local structure; obtaining feature result data; and comparing the feature result data with similar result data for consistency. By setting up a structure recognition module, a data acquisition module, an instruction adjustment module, and a comparison module, children can complete self-correction, ensuring their interest in learning.

The utility model discloses an automobile rubber vibration absorber which comprises a shell and a balance weight mass block, first rubber structures are installed on the two sides of the balance weight mass block, and the sides, away from the balance weight mass block, of the two first rubber structures are connected with the shell. And a second rubber structure is mounted below the counterweight mass block on the shell. According to the vibration absorber, when a vehicle runs to cause large vibration of a local structure, the vibration absorber starts to work, vibrates according to the specific natural vibration frequency under the action of external force and generates counter-acting force, and therefore vibration of the structure is reduced.

The invention provides a steam generator local three-dimensional two-phase flow analysis and calculation method and system, a geometric model of a steam generator is divided into a heat transfer tube bundle area and a local structure area, a high flow rate phenomenon caused by the local structure area is considered, and the local three-dimensional two-phase flow of the steam generator is calculated through boundary conditions of the geometric model of the steam generator. According to the method, the heat transfer tube bundle area and the local structure area are subjected to coupling calculation, the local structure area is introduced into model calculation, the local high flow speed phenomenon of part of the heat transfer tubes of the steam generator can be accurately analyzed, and therefore the possible heat transfer tube flow-induced vibration and abrasion problems can be predicted more accurately.

The utility model discloses a combined ecological fence which comprises a fence body, mounting mechanisms are fixedly arranged at the four corners of the fence body, supporting mechanisms are fixedly arranged at the front positions of the upper ends of the two sides of the fence body, and buffering mechanisms are fixedly arranged at the rear positions of the upper ends of the two sides of the fence body. When the fence is used, through the design of the supporting mechanism and the buffering mechanism, when the fence encounters wind blowing, animal collision or other external force in the using process, impact force can be transmitted to the supporting mechanism through the blocking net, at the moment, a movable block arranged on the supporting mechanism can slide on a sliding rail, and through movement of a hinge rod, the movable block can slide on the sliding rail; the local structure of the fence is adjusted to adapt to the action of external force and dispersion force, the fence is prevented from being damaged due to local stress concentration, meanwhile, movement of the moving block is transmitted to the moving plate of the buffer mechanism through the moving rod, the moving plate compresses the buffer spring and the spring damper, and the spring damper can effectively consume impact energy.

The utility model discloses a steel structure wall and concrete wall deformation joint node structure, which relates to the technical field of steel structure buildings and is provided with a deformation joint inner cover plate, a pair of deformation joint outer cover plates and heat insulation cotton. The deformation joint inner cover plate shields an inner side opening of the deformation joint, the pair of deformation joint outer cover plates shields an outer side opening of the deformation joint, and the deformation joint inner cover plate and the pair of deformation joint outer cover plates are fixedly installed on the steel structure wall and the concrete wall respectively and are mutually inserted and embedded; and heat preservation cotton is filled between the deformation joint inner cover plate and the pair of deformation joint outer cover plates in the deformation joint. The outer side opening of the deformation joint is shielded by the deformation joint outer cover plate of which the end parts are mutually inserted and embedded, and the inner side opening of the deformation joint is shielded by the deformation joint inner cover plate of which one end is fixed and the other end can slide in a manner of being attached to the inner side surface of the wall body, so that a certain structural abdication property is achieved; local structure damage caused by inconsistent settlement and thermal expansion and cold contraction reaction of a steel structure and concrete is not prone to being generated, and the structure is suitable for being used as a steel structure wall and concrete wall deformation joint node structure.

An anchoring assembly for a riser fitting uses a plate and a sleeve to support a short pipe that penetrates the floor of a structure (such as a building) in which the riser is located. Studs extending from the plate and the sleeve engage the floor and enhance the local structural strength of the floor. A bracket engaging the plate is used to mount the short pipe within the sleeve. A riser fitting element is attached to the end of the short pipe. Fire-resistant insulation is positioned between the short pipe and the sleeve.

According to the separable base material layer printing film for the electronic product, after the functional structure layer of the printing film product is fixedly attached to the surface of a local structure, the base material structure layer can be rapidly and efficiently separated from the boundary of the separable connecting structure layer relative to the functional structure layer; not only is the thickness of a printing film product actually participating in work reduced so as to optimize the internal space layout of an electronic product, but also the working heat dissipation effect of a fitting position can be improved. The separable base material layer printing film comprises a separable connecting structure layer located in the middle, a base material structure layer playing a supporting role is arranged on one side of the separable connecting structure layer, and a functional structure layer is arranged on the other side of the separable connecting structure layer. The functional structure layer can be attached and fixed to the surface of the electronic product; the base material structure layer and the separable connecting structure layer can be separated relative to the functional structure layer, and the functional structure layer is reserved on the surface of the electronic product.

The application discloses a kind of semi-covering layer semi-bedrock foundation gravity dam foundation seepage prevention water stop design method, belong to the field of hydraulic engineering design.This application method is aimed at the complex conditions of semi-covering layer semi-bedrock foundation, adopts zoning combination seepage prevention scheme: bedrock region sets seepage prevention curtain, covering layer region sets seepage prevention wall;Comprehensive construction period structure dead weight, running period structure dead weight, water pressure, uplift pressure and other loads, design seepage prevention wall top and dam foundation embedded joint and dam bottom local structure, reserve deformation and with two purple copper water stop to realize water stop by asphalt mortar joint filling;Finally, the rationality of scheme is verified by three-dimensional finite element seepage deformation numerical calculation.This application breaks through the limitation of traditional design, provides quantitative design method, and has strong operability, provides technical support and reference for similar projects.

The utility model belongs to the technical field of hydraulic rod pieces, and discloses a hydraulic rod piece local structure which comprises a hydraulic supporting rod, a movable shaft is arranged at the top end of the hydraulic supporting rod, a mounting disc is arranged at the top end of the movable shaft, the outer wall of the mounting disc and the outer wall of the hydraulic supporting rod are jointly connected with a supporting mechanism, and the supporting mechanism comprises two fixing rings. The hydraulic supporting rod and the installation disc are fixedly installed on the movable shaft, the two fixing rings are fixedly installed on the outer wall of the hydraulic supporting rod and the outer wall of the installation disc in a sleeving mode correspondingly, driving gears are arranged on the sides, close to each other, of the two fixing rings correspondingly, U-shaped blocks are fixedly installed on the driving gears correspondingly, winding shafts are arranged in U-shaped grooves in the U-shaped blocks correspondingly, and the two winding shafts are connected through a steel wire rope. The length of the steel wire rope between the two winding shafts is adjusted through rotation of the winding shafts, the steel wire rope is kept in a tightened state, and the bearing force of the movable shaft is shared and buffered through the steel wire rope.

The utility model belongs to the technical field of molds, and relates to a child folding plastic dining chair mold. The chair back forming mold comprises a chair back forming lower mold and a chair back forming upper mold, and an injection molding part is arranged above the chair back forming upper mold. In the injection molding process, molten materials are injected into the cavity through the injection molding piece, side holes of the plastic chair back can be synchronously formed through the side double-hole coaxial core pulling assembly, hole grooves with small diameters on the inner side and hole grooves with large diameters on the outer side are formed, a plurality of side hole grooves with different diameters are formed at a time, secondary machining treatment is not needed, and the production efficiency is improved. According to the injection mold, the working procedure is shortened, the production efficiency is improved, the pitched roof auxiliary forming part can synchronously form the local structure of a plastic part, after injection molding is completed, the formed plastic part is ejected out through the straight ejection demolding part and the pitched roof auxiliary forming part, and the demolding area and efficiency are greatly improved by adopting a straight and pitched roof combined ejection structure.

The utility model provides a kind of joint for metal winding reinforced composite pipe, it is related to metal winding reinforced composite pipe auxiliary structure technical field, it aims at solving the problem that existing joint for metal winding reinforced composite pipe adopts hot melt joint, conventional joint adopts single-layer structure design, and the relative sealing of local structure of joint is poor, including pipe body, the pipe body is metal winding reinforced composite material, the right end of the pipe body is movably connected with joint, the abutting position of the pipe body and joint is handled using welding, the joint adopts multilayer structure setting, the inner layer of the joint is sealed inner tube, the outer layer of the joint is outer sealing tube, the middle part of the outer sealing tube is designed using bellows.

The utility model discloses a vertical joint structure for surface extrusion damage of a compressive joint, which comprises a surface waterstop, a bottom waterstop and a wedge-shaped rubber plate, the wedge-shaped rubber plate is arranged in the compressive vertical joint, the surface waterstop comprises a protective cover and plastic packing, the plastic packing is paved and filled along the compressive vertical joint, the protective cover is arranged on the outer side of the plastic packing, and the wedge-shaped rubber plate is arranged on the bottom waterstop. The bottom water stop comprises a bottom protection mechanism, a water stop copper sheet and a filling mechanism, the filling mechanism is arranged in the bottom end of the pressing vertical seam, the water stop copper sheet is arranged below the pressing vertical seam, and the bottom protection mechanism is arranged on the lower portion of the water stop copper sheet. By adjusting the local structure of the compressive joint, the adverse consequence that the panel is extruded and damaged is relieved, the space margin of surface extrusion is enlarged through the wedge-shaped vertical joint with the large surface and the small bottom, the wedge-shaped structure also meets the shape of the deformed compressive vertical joint, and therefore direct extrusion of concrete on the two sides of the compressive vertical joint is further avoided, and the service life of the compressive joint is prolonged. And panel extrusion damage is relieved.

The invention discloses a manufacturing method of a 3D thermal shrinkage super-surface biochemical sensor, and belongs to the technical field of metamaterials. The method comprises the following steps of: 1, depositing a metal transition layer on the surface of a pyrocondensation material; 2, depositing a metal reflecting layer on the metal transition layer to obtain AS; and step 3, performing winding type irradiation on the AS obtained in the step 2 by adopting pulse laser, and controlling the number of laser irradiation turns to achieve the purpose of height, thereby realizing the processing of the 3D thermal shrinkage metasurface biochemical sensor. The 3D thermal shrinkage super-surface biochemical sensor is processed through a femtosecond laser technology, the local part of the sensor is rapidly shrunk to restore to the original shape through laser-induced thermal shrinkage by utilizing the memorability of a polymer, the feature size of the local structure of the sensor can be reduced on the premise of not changing the morphology and structural features of the sensor, the aspect ratio is increased, and the performance of the sensor is improved. And the sensitivity of the metasurface material is obviously improved. The method also has the advantages of low equipment requirement, low operation difficulty, short preparation time, no generation of byproducts in the processing process and the like.

The application provides a station mark detection method and related equipment. First, the local part of the station mark is detected, and a candidate combination frame is determined according to a suspected frame pair in the result that meets a screening condition. The suspected frame pair includes a station mark pattern detection frame and a station mark character detection frame. The candidate combination frame is a circumscribed rectangle of the station mark pattern detection frame and the station mark character detection frame. The serialized features of the candidate combination frame are extracted and classified to determine whether the candidate combination frame is a station mark combination. Finally, the sub-frame and the parent frame in the station mark are output. The station mark pattern detection frame and the station mark character detection frame are the sub-frames, and the candidate combination frame is the parent frame. By using the topological relationship (correlation relationship) between the local structure of the station mark, the detection of the local part (sub-frame) and the whole (parent frame) of the station mark can be realized end to end, the situation of missing detection of the local part of the station mark is reduced, and the efficiency and accuracy of station mark detection and identification are improved.

The invention relates to a shaft measurement reference seat and a high-precision shaft local structure size measurement method, one end of a shaft is a positioning end face, and the reference seat comprises a radial limiting structure which limits the shaft in the radial direction so that the shaft can only move in the axial lead direction of the shaft; the universal floating platform is provided with a datum plane corresponding to the positioning end face, the datum plane is perpendicular to the axis of the universal floating platform, and the axis coincides with the axial lead; when the contour line of the positioning end face is not perpendicular to the axis, in the attaching process of the positioning end face and the datum plane, the universal floating platform elastically deforms, the axis is bent to enable the datum plane to incline, and after the positioning end face is separated from the datum plane, the datum plane is reset. And the reference surface of the universal floating platform without elastic deformation is used as a reference to measure the size parameters of the shaft. Therefore, the number of sensors used in the tight measurement process of the shaft can be reduced, the measurement rhythm is improved, and the manufacturing cost of measurement equipment is reduced.

The present invention discloses a multi-mode industrial process monitoring method, apparatus, equipment, and storage medium, including: collecting and preprocessing operating data and performing pattern division through clustering; using affinity matrices between and within patterns to calculate the divergence matrices between and within patterns, respectively; constructing a final objective function; iteratively updating the projection matrix, sharing matrix, and error matrix therein to obtain the final projection matrix; calculating the statistics and control limits of each pattern; calculating the statistics of new samples when they arrive, comparing them with the corresponding control limits, and issuing fault information. High-dimensional data is mapped to a low-dimensional space using the projection matrix, preserving the original features; analyzing the industrial process through the local structure and inherent characteristics of the data within each pattern contained in the features, as well as the relationships between different patterns and common information. The method can fully consider the inherent characteristics of each pattern and the correlations between patterns to monitor the industrial process, thereby improving the accuracy of fault monitoring.

The invention discloses a momentum wheel mounting structure optimization and verification method suitable for in-orbit vibration source frequency avoidance, and the method comprises the steps: determining whether the momentum wheel generates resonance at a normal working rotating speed or not through the response measurement of the speed increasing process of the momentum wheel under the condition of a free boundary of a whole satellite, and further generating disturbance vibration to other sensors; establishing a system-level whole satellite model containing an assembly or a local simulation model capable of reflecting installation local rigidity, and carrying out modal analysis; the method comprises the following steps: under limited space constraints, carrying out operation efficacy and reinforcement state simulation iteration without disassembling a product, determining a reinforcement mode direction according to a formation, determining specific parameters according to frequency, and carrying out convergence to obtain a lightest, most efficient and operable integrated lightweight reinforcement structure under different momentum wheel mounting positions; and performing reinforcement design to the whole satellite, performing momentum wheel acceleration process response measurement under the condition of the free boundary of the whole satellite, determining the local structure frequency of the reinforced momentum wheel according to the formant occurrence frequency, and determining whether the in-orbit frequency avoidance reinforcement design meets the requirement or not.

The invention discloses a disease treatment method for old airport lanes in a high heat area. The method comprises the following steps: S1, disease evaluation and classification treatment; s2, planning a processing scheme; s3, high-temperature-resistant composite cover surface treatment; and S4, interface reinforcement and drainage optimization. According to the method, the pavement disease type and severity are determined by evaluating and classifying the diseases, the treatment scheme is determined according to the pavement disease type and severity, local structure repair is performed according to the treatment scheme, and compared with an existing cement concrete plate replacement repair mode, the method has the advantages of being short in construction period and low in cost.

A method for determining electronic band structure includes partitioning, based on a location of each of a plurality of atoms forming a crystalline structure, a volume of the crystalline structure to obtain Voronoi tessellations. The method also includes constructing, based on the Voronoi tessellations, a plurality of crystal graphs and deriving, based on the plurality of crystal graphs, one or more local structural features of the crystalline structure. The method also includes feeding, into a trained machine-learning model, the one or more local structural features, one or more global structural features of the crystalline structure, and one or more species-based features of the crystalline structure. The trained machine-learning model, in response to said feeding, returns a plurality of energy values that sample a Brillouin zone of the crystalline structure.