1176 results about "Optimal design" patented technology

A computer-implemented automated building design and modeling and construction project cost estimating and scheduling system (“DMES system”) is described. The DMES system provides a central source for all of the design and construction information for a construction project in a coordinated two-dimensional and three-dimensional spatial database that is freely accessible by all of the members of an interdisciplinary construction project team as a means to produce automatically coordinated design development and construction document information. The DMES system acquires and stores all of the appropriate design, engineering, and construction expertise and information available for any building type for use in automatically assembling and coordinating the design, cost-estimating, and scheduling for a construction project. In one embodiment, the DMES system consists of a plurality of objects, comprising elements and massing elements arranged in an assembly hierarchy. Each of the objects includes programming code that defines an interface and discrete internal functions that define its behavior. When instantiated in the database, the objects automatically create further instances of other objects in the hierarchy, which in turn do the same, thus assembling a complete building model automatically from the initial manually-placed instance. The building model enables automatic generation of drawings and cost and scheduling information. By running automatic iterations of the building model, multiple designs may be evaluated to determine the optimum design.

A link extends between a distal member and a proximal member of a wearable device, such as an exoskeleton, orthosis or prosthesis for a human lower limb. One or other of the distal member and the proximal member includes a crossing member. The link extends from the crossing member of the distal member or the proximal member, to the other of the distal member or the proximal member. Actuation of the link translates to a force at the distal or proximal member that is normal to a major longitudinal axis extending through the distal and proximal members. In one embodiment, a sliding link of a device configured for use with a human joint tracks two degrees of freedom of the joint.

A finite element pre processing method for reconstructing a three-dimensional entity model comprises the steps that first, a material object is scanned so that point cloud data can be acquired; second, the point cloud data are imported to 3-matic software, and the position of the model is adjusted; third, the point cloud data are de-noised and sampled; fourth, three-dimensional reconstructing of the point cloud data is performed through a computer, wherein the point cloud data are packaged so that a surface mesh model can be generated; fifth, thin wall characteristic analysis is performed on the model so that a basic model structure can be known; sixth, three-dimensional repair is performed on model meshes, so that the edges of the model are matched with the defect contour of the material object; seventh, the model is redesigned as required, and thus the structure of the model can be more reasonable and meet the design requirement; eighth, the meshes of the redesigned model are partitioned again; ninth, a volume mesh is generated, material attributes are added, and the new model is saved in the format through which finite elements can be directly analyzed; tenth, finite elements are analyzed. Through the method, the scanned data processing time is shortened and FEA/CFD pre processing time are shortened, and optimal design of the model can be conveniently performed.

The invention provides a method for constructing a thinned MIMO (Multiple Input Multiple Output) planar array radar antenna, which is on the basis of a phase center approximation principle and combines an MIMO antenna thought. The antenna arrangement optimal design is carried out by adopting the MIMO antenna thought. When all transmitting array elements simultaneously (or in turns) transmit orthogonal signals and receiving array elements simultaneously receive echo signals, a virtual planar array with uniform intervals is subjected to equivalence processing by utilizing the phase center approximation principle. According to the thinned MIMO planar array radar antenna constructed according to the invention, few transmitting antenna array elements and few receiving antenna array elements can be adopted and the equivalent full-array-element arrangement planar antenna array is virtually realized. Compared with the planar array antenna which is the same size as the equivalent virtual planar array and is directly arranged, the thinned MIMO planar array radar antenna constructed according to the method disclosed by the invention has the advantage of greatly reducing the requirement on the number of the array elements.

A system and method for analyzing timing and noise effects in a hybrid circuit which contains a plurality of electrical components. The timing and noise effects for the hybrid circuit are generated by simulating electrical conditions within a hybrid circuit model. The hybrid circuit model is constructed by creating and integrating analog and behavioral models from the plurality of electrical components. The timing and noise effects remain accurate even at high printed circuit board/multi-chip module clock speeds, thereby ensuring that a user is able to construct an optimal design for any one of the plurality of electrical components.

The invention discloses an RAID (redundant array of independent disc) 5-orientated optical design method for a writing operation in continuous data storage. The method comprises the steps of: in continuous data storage application, saving writing data blocks, transmitted by an application program, in a memory buffer area; constructing an alignment data block of which the length is the same as that of a complete strip of an RAID5; then enabling the alignment data block to fill the overall strip opportunely on the RAID5; and then transmitting the alignment data block to the RAID5 so as to write the overall strip of the RAID5. Therefore, the written data blocks fill the overall strip of the RAID5 opportunely to avoid the expense for generating the verification of reconstruction, read-modify-write and the like; and the continuity of the data blocks avoids the expense of track seeking of a magnetic head, and improves the throughput capacity of a storage system. Simultaneously, the data blocks written into the RAID5 are sequenced and are written into adjacent strips continuously so as to realize the continuous I/O transmission of the RAID5. The invention is also suitable for an RAID6.

A subwavelength terahertz (THz) switch using an artificially designed conductor metamaterial is discussed in this invention. Theoretically, slow-light EM wave propagating at THz speed imitates the strongly localized surface plasmon modes and henceforth is called Spoof Surface Plasmon Polariton (SSPP) mode in this invention. The SSPP mode of slow-light EM propagation can be easily tailored by changing the refractive index of the dielectric materials inside the metallic gap structure engineered as a periodic array of grooves. Thus, the incorporation of electro-optical material which has birefringence such as a nematic liquid crystal (N-LC) or multiple-refractive indices into the metallic gap leads to a highly compact and efficient terahertz switch being controlled by a low-voltage signal. The optimal design of the SSPP switch enabled by this novel method shows many interesting properties including 1) strong subwavelength localization; 2) relatively high extinction (On/Off switching) ratio; and 3) small damping attenuation. The THz dynamic switches can be used to construct linear switches, Y junction switches and Mach-Zehnder interferometers by using micromachining and other fabrication techniques.

Choice experiments are a type of survey which can be used to model user behaviour, in which survey respondents are presented with a choice of combinations of features and forced to one set of features. A computational system for performing choice modelling is described. This system comprises a user interface module, that allows an end users to specify what they set of features they wish to investigate (the attribute space), and constraints. A design generator module is used to generate an experimental design that matches the user defined attribute space. A range of different designs can be generated and compared to identify the optimum design. The design generator allows the user to specify their exact problem, rather than forcing them to modify their problem to match a known experimental design. An online survey assembly module is used to generate survey templates and a data collection and sampling uses the templates to display treatments to the respondents. A model generation model analyses the collected data, and a model explorer module is provided to allow the user to explore the results. The system has the advantage of making choice modelling accessible to a wider range of users, and enables users considerable freedom and scope to investigate problems of specific interest.

Exemplary embodiments of the present invention are directed to methods and program products for optimizing clustering of a design structure matrix. An embodiment of the present invention includes the steps of using a genetic operator to achieve an optimal clustering of a design structure matrix model. Other exemplary embodiments of the invention leverage the optimal clustering by applying a genetic operator on a module-specific basis.

An embodiment of the invention provides an SDN-based tiered routing path determination method and device that are applied to an inter-domain controller and an intra-domain controller in a software-defined network; the SDN-based tiered routing path determination method comprises the following steps: a cross-domain request of a data flow sent by the intra-domain controller is obtained; according to the cross-domain request, a start point network domain and an intermediate network domain where a source node is positioned are determined; network performance information sent by the intra-domain controller is obtained; according to the network performance information and a plurality of preset cross-domain route selection strategies, an optimal routing path for transmitting the above data flow in all network domains is determined; according to the start point network domain and the intermediate network domain, boundary information of a first network domain and boundary information of a second network domain are determined and sent to the intra-domain controller, and the intra-domain controller is enabled to determine the optimal routing path for data transmission in the network domains. Via the SDN-based tiered routing path determination method and device, optimal design of a cross-domain routing path can be realized.

The invention belongs to the field of motor optimization designs, and relates to a multi-objective hybrid particle swam optimization design method for a double-fed wind power generator. The method comprises the following steps of: (1) determining a constraint condition and a to-be-optimized design variable of the double-fed wind power generator, and establishing sub-objective function equations to form a multi-objective function; (2) constructing variable space by using the to-be-optimized design variable, and constructing non-dominated solution sets of population according to the quality of an objective value; (3) ordering the non-dominated solution sets according a Pareto domination mechanism, determining a population niche by taking a non-dominated solution as a core, establishing a particle speed updating mechanism and finally obtaining an optimal design scheme; manufacturing a mode machine according to the optimal design scheme, inspecting an actual operation index of a motor, and comparing the actual operation index with an index given by the design scheme; and if the actual operation index exceeds a requirement range of operation indexes, adjusting a performance design scheme. Due to the adoption of the motor optimization design method provided by the invention, overall economic benefit and wind energy utilization rate of a wind power generating system can be improved.

There is disclosed a method of producing a design layout by optimizing at least one of design rule, process proximity correction parameter and process parameter, including calculating a processed pattern shape based on a design layout and a process parameter, extracting a dangerous spot having an evaluation value with respect to the processed pattern shape, which does not satisfy a predetermined tolerance, generating a repair guideline of the design layout based on a pattern included in the dangerous spot, and repairing that portion of the design layout which corresponds to the dangerous spot based on the repair guideline.

To provide a UML design method by which architecture design pursuing optimal design parameters while viewing the overall target system on the UML model can be performed. A UML design method of the present invention is a UML design method for performing design by modeling a target system based on Unified Modeling Language (UML), using a profile storing a design parameter, the method including the steps of: storing a stereotype and a tagged value in the profile as the design parameters; annotating a UML model of the target system with the stored stereotype and tagged value; and associating the added stereotype and tagged value with each class constituting the UML model, and displaying the stereotype and tagged value and the UML model, which are associated, on a graphical user interface.

The method and system of the present invention allow a designer of a mechanical system to quickly and easily determine the optimal design for the system. The steps include creating models of the mechanical system and simulating the performance of the models to achieve a set of results. From these results, Response Surface Models can be determined. These Response Surface Models act as surrogates for the more complex models of the mechanical system, and can be used to optimize the performance of the system. If necessary or desired, these Response Surface Models can be optimized over a range of possible values for the design parameters to achieve a robust design.

A method for the design and optimization of inductors for RF circuits. This method consists in the formulation of RF circuit designs as geometric programs. The designer can specify a wide variety of specifications such as gain, bandwidth, noise, etc. The method, which was implemented in simple code, determines inductor dimensions and component values in a few seconds real-time. The results was also a globally optimal design.

The invention discloses a transient power quality detection device and a method for the same, belonging to the technical field of power transmission and distribution. The method comprises the following steps of: acquiring an undisturbed standard signal, processing the undisturbed standard signal with an improved S transformation method to get a base matrix of the undisturbed standard signal; acquiring voltage sag, voltage swell, voltage interruption, high-frequency transient disturbing signals and low-frequency disturbing signals, scaling a curve chart of the signals after being processed by the improved S transformation, building a standard template, and storing the template in a database; acquiring three-phase voltage and three-phase current data in a power grid; and matching the digital image curve with the standard template in the database according to a digital image matching principle so as to get the disturbance patterns. The invention provides the transient power quality detection device and the method for the same based on the improved S method, optimal design is provided in the aspects of detection accuracy, function implementation, data storage and the like of the device, so that real-time analytical ability and remote communication capability of transient power quality detection are improved.

The invention discloses a precision lost wax casting technology based on selective laser powder sintering 3D printing. The precision lost wax casting technology comprises the following steps that S101, a target part is subjected to optimal design of a CAD casting technology; S102, selective laser powder sintering 3D printing forming is carried out; and S103, silica sol/water glass precision investment casting is carried out. A wax mold of the part can be fast manufactured without molds, the metal part is fast manufactured, fast manufacturing of complex parts can be achieved, and integration, automation and fastness in the precision casting technology process can be achieved; and the development period of new products are greatly shortened, development cost is reduced, and the precision lost wax casting technology is especially suitable for production of single small-batch complex castings and trial-manufacturing of new products.

The invention provides a method for analyzing and designing a green building. In the method, a series of preliminary design conditions are provided for the design of the green building by computer-assisted design and multi-physical model analysis, and the optimal design conditions of the green building are obtained by weight calculation and analysis; based on the exterior environment of the building, weather conditions and various local renewable energy source conditions, the sorts and rules of available renewable resources can be obtained by establishing a sunlight analysis model, a wind field mathematic model, a noise physical model, a thermal conductivity effect analysis model, an interior daylight physical analysis model, a resource analysis model and the like, and inputting the basic data of rainfall, solar radiation intensity, wind speed, wind direction, geological exploration and the like; the feasibility of the utilization of geothermal resources and the renewable resources is obtained according to the calculation results of the resource analysis model; and on the basis of the feasibility, the final design of the shape of the green building is performed so as to provide boundary condition guide for the design of the green building.

A method of designing a material by optimising values for design variables includes the steps of: (i) providing one or more property models that produce a prediction for a value of a respective property of the material as a function of the design variables and produce a value for the uncertainty in the prediction, (ii) setting a specification target for a desired value for each property and a probability for that specification target to be met or exceeded, (iii) determining a probabilistic target for a value for each property, the probabilistic target being based on the specification target and the probability, and defining a merit index factor based on the degree to which a given prediction satisfies the probabilistic target, (iv) constructing an overall merit factor from the individual merit index factors of the properties, and (v) determining a set of optimal design variables that optimise the overall merit factor.

The embodiment of the invention discloses a minimum life cycle net cost-based microgrid system optimal design method, which is used for confirming the optimum capacity configuration of each distributed power source and accumulation energy in the microgrid system in accordance with an operating strategy of a microgrid system and according to the conditions of the renewable energy sources resources, the load demands and the like in the microgrid system to guarantee the net cost to be within the life cycle, i.e. the cost is minimum. The method disclosed by the embodiment of the invention comprises the steps of: building a life cycle net cost-based target function of the microgrid system; confirming the optimal variable quantity of the target function according to the operating strategy of the microgrid system; confirming a constraint condition of the target function according to the operating strategy of the microgrid system; performing the quasi-steady-state emulation on the target function according to the constraint condition, and generating an optimal variable quantity combination to obtain an optimal computation result by means of the intersection and variation operations of a standard genetic algorithm; and confirming system parameters of the microgrid system according to the optimal computation result.

The invention relates to the field of engineering manufacture, in particular to an optimal design method for production line layout. The technical problem that the influence of production fluctuation on production efficiency cannot be reduced by the conventional method so as to reduce enterprise benefits is solved. According to the scheme, the optimal design method for new production line layout mainly comprises the following steps of: acquiring the labor house data of original sub-procedures; generating functional segments and a station number by adopting a line balancing planning method, so that the cycle time of a single line in each functional segment is shortest; when total investment C is determined, finding all N and S combinations consistent with a constraint condition by using an enumeration method; calculating the cycle time of each functional segment; calculating the overall cycle time of each [N, S] scheme; and performing calculation according to the steps, and when the total investment C is determined, determining a scheme with the shortest cycle time in all the [N, S] schemes as a target scheme. The method can be used for the design of the new production line layout and the modification of the conventional production line layout.

Recent work has shown that in nearly line-of-sight (LOS) Multiple-Input Multi-Output (MIMO) wireless communication systems, spacing antennas according to the symbol wavelength rather than the carrier wavelength improves multiuser performance. MIMO systems have a heavy reliance on a multipath rich environment, which may not always be present in close range ultra wideband conditions. By adding reflector elements to the antenna structure, this multipath rich environment can be induced. The performance of the users with respect to the arrangement of antennas and reflector elements is a non-linear function that a genetic algorithm (GA) seems applicable for exploiting both symbol-wavelength spacing and multipath inducing reflector elements. A GA optimization is used to determine the optimum characteristics for antennas and reflector elements. MIMO system models with four users, and three, four, and five antennas are considered using a two-dimensional LOS channel with additive white noise. Subsequently, a GA optimization design and approach for solving this problem in three-dimensional space is presented. The addition of reflector elements to purposely increase multipath requires additional design considerations incorporating distributed processing, ray-tracing, and the determination of the channel impulse response.

An axial flow pump impeller all-operating-condition design method comprises the following steps that 1, parametric modeling of an axial flow pump impeller is performed, namely 2k design parameters including k wing section cascade solidities and wing placement angle values of the axial flow pump impeller are selected; 2, all-operating-condition optimal design is performed: firstly, conventional design parameters of the impeller are dertemined, then numerical calculation is conducted on the design conditions of the axial flow pump impeller and various losses in a pump are comprehensively analyzed to preliminarily design the axial flow pump impeller having better hydraulic performance under the design conditions in a total-loss minimization mode; secondly, guide blades, a water guide cone and water inlet and outlet flowing channels of the impeller are designed; thirdly, the optimal all-operating-condition weighted average effciency of the pump device is regarded as a target, a lift is regarded as a constraint condition, and a seqential quadratic programming method of a gradient optimum algorithm is adopted to constantly change the design parameters of the axial flow pump impeller and perform iterative numerical calculation of the pump device. The axial flow pump impeller all-operating-condition design method adopts CFD numerical calculation, the design accuray is high, and optimization results are reliable.

The invention discloses a vibration modeling and analyzing method of a crack impeller structure of a centrifugal compressor. The vibration modeling and analyzing method comprises the steps of firstly, providing a modeling method of a centrifugal impeller, obtaining a whole model by rotating and converting a finite element model of a section of the impeller, reducing the DOF (Degree of Freedom) of a system by adopting a hybrid interface modal synthesis method, and simulating a breath effect of a crack by defining a contact mode on a crack interface; secondly, providing a method for solving large-scale symmetrical sparse matrix-inverse matrix, and thus obviously reducing the memory space needed by calculation; finally, providing a method for carrying out statistical analysis on resonant frequency of the crack impeller structure, considering dissonant factors such as manufacturing error and state degradation which exist in an actual impeller, and obtaining statistical regularity of structure resonant frequency under a random dissonant mode. According to the vibration modeling and analyzing method disclosed by the invention, the calculating accuracy is ensured, obvious improvement effect of calculating efficiency is realized at the same time, and a high-efficiency analyzing method is provided for optimal design of the impeller and quantitative diagnosis of the crack.

The invention discloses an automobile energy absorption box based on negative poisson ratio structure filling and a multi-object optimization method thereof. An energy absorption box body (2) is filled with negative poisson ratio filling inner cores (3) with an inner sunken hexagonal negative poisson ratio structure, wherein deformation induction grooves are designed on the energy absorption box body (2). The energy absorption box body is connected between front protection transverse beams and front longitudinal beams. Through mechanical properties uniquely owned by the negative poisson ratio structure, a stress deformation state during automobile collision is improved, and the energy absorption effect is reinforced, so that safety of passengers is improved, and maintenance cost is reduced. Meanwhile, the invention provides a multi-object optimization scheme aiming at the novel structure; through parametric modeling of the energy absorption inner cores, an energy absorption outer shell and a surrounding structure, on the basis of the Hamersley experimental design, the structure is subjected to crash simulation, a model approximating a response surface is obtained, and finally optimal design parameter combination is obtained on the basis of multi-object optimization of imperial competition algorithm; and the process can be applied to the development process of actual industrial production, reliability is improved, and the development time is reduced.

A method for designing Wavelets for communications and radar which combines requirements for Wavelets and finite impulse response FIR filters including no excess bandwidth, linear performance metrics for passband, stopband, quadrature mirror filter QMF properties, intersymbol interference, and adjacent channel interference, polystatic filter design requirements, and non-linear metrics for bandwidth efficient modulation BEM and synthetic aperture radar SAR. Demonstrated linear design methodology finds the best design coordinates to minimize the weighted sum of the contributing least-squares LS error metrics for the respective performance requirements. Design coordinates are mapped into the optimum FIR symbol time response. Harmonic design coordinates provide multi-resolution properties and enable a single design to generate Wavelets for arbitrary parameters which include dilation, down-sampling, up-sampling, time translation, frequency translation, sample rate, symbol rate, symbol length, and set of design harmonics. Non-linear applications introduce additional constraints. Performance examples are linear communications, BEM, and SAR.

The invention discloses an asphalt mixture virtual performance test prediction method based on mesoscale simulation. The method comprises the steps of designing an initial mix proportion of an asphalt mixture, acquiring basic parameters of a material, carrying out a DSR test of asphalt mortar, carrying out a virtual creep test on the asphalt mortar, converting parameters in a virtual system, choosing multiple indoor tests needing to be predicted, constructing various three-dimension virtual test pieces, choosing a mechanic constitutive model of the material, choosing a loading condition of the virtual test, constructing a real-time monitoring system for test results, outputting final result prediction values of all the tests, comparing all indexes with standards to judge whether requirements are met, outputting suggesting to reselect a mix proportion if the requirements are not met, and outputting an optimal mix proportion if the requirements are met. According to the method, additional curves of the test results are monitored in real time, the obtained output results are compared to judge whether multiple performance indexes of the mixture to be predicted meet the standard requirements, unnecessary relative-property indoor tests are reduced, and test basis is provided for optimal design of the mix proportion of the asphalt mixture.

The invention relates to a method for optimally designing the structure of a sliding shaft sleeve based on a Kriging model. By using an unbiased optimal estimation theory of the Kriging model, the optimal design scheme of the sliding shaft sleeve is predicted and solved. The method comprises the following steps of: determining the basic appearance of the sliding shaft sleeve; analyzing and defining a design variable and a definition domain, which influence the shape of the sliding shaft sleeve; sampling a design space by using a Latin hypercube experiment design method; calculating the stress response of the sliding shaft sleeve by using a finite element method; constructing the Kriging model, and performing accuracy estimation; and constructing a mathematical optimization model, solving the optimal design scheme of the sliding shaft sleeve, and validating by using the finite element method. By using the design variable correlation and variability characteristic of the Kriging model, the unbiased optimal estimation is performed, and guidance is provided for optimal design of the structure of the sliding shaft sleeve. Compared with the conventional method, the method provided by the invention has the characteristics of high calculation speed, optimal scheme design and high reliability.

The invention discloses an adaptive PID controller optimization design and setting method based on binary ant colony algorithm. The method can automatically optimize the design of the PID controller structure according to the set performance index in the open-loop and closed-loop states and optimize the corresponding control parameters online. In the present invention, a maximum-minimum binary ant colony optimization algorithm is proposed to realize object system identification, control structure design and parameter optimization. In the specific implementation, parameters such as the encoding length of the binary ant colony algorithm are adaptively set according to the parameter accuracy and range. The proposed method of judging re-initialization based on the maximum and minimum limit probability of pheromone can further improve the global optimization performance of the algorithm and improve the optimal control quality of the controller. The PID controller optimization design and parameter tuning method has universal applicability and flexibility, simple application, and can be widely used in the optimization design tuning of PID controllers in industrial control.

In a method of manufacturing projection objectives including defining an initial design for a projection objective and optimizing the design using a merit function, a set of related projection objectives including a first projection objective and at least one second projection objective is defined. Further, a plurality of merit function components, each of which reflects a particular quality parameter, is defined. One of these merit function components defines a common module requirement requiring that the first projection objective and the second projection objective each include at least one common optical module that is constructed to be substantially identical for the first and the second projection objective. The method results in a set of projection objectives having at least one common optical module. Employing the method in the manufacturing of complex projection objectives, such as projection objectives for microlithography, facilitates the manufacturing process and allows substantial cost savings.