15 results about "Dimensional modeling" patented technology

The invention discloses an optimization design method of a radial-flow-type hydraulic turbine. In the design method, a unitary thermal optimization design, a three-dimensional modeling method of a through-flow part and a complete machine optimization platform are utilized, wherein the optimization platform comprises four modules, namely nozzle blade and impeller blade parameterization, a coevolution genetic algorithm, a self-adaption approximation model, and autocall of CFD (computational fluid dynamics). Through the parameterization, characteristic variables describing impeller blades, nozzle blade patterns and installation angle variation are extracted. The optimization target is to enhance the overall efficiency and expansion ratio of the hydraulic turbine simultaneously under a complete machine environment. The optimization platform can be used for reducing the calculated amount and accelerating the convergence by virtue of the following measures: the approximation model is built and updated by a dynamic sampling strategy, and enough prediction accuracy is obtained by virtue of less CFD calculation; and a complicated multivariable optimization problem is decomposed into a plurality of relatively independent and interactive subproblems by virtue of the coevolution genetic algorithm, so that not only can the characteristics of the original problem be maintained, but also the calculated amount is reduced effectively.

The invention discloses a house-renting management system capable of opening locks based on Bluetooth or two-dimensional codes and a method thereof and belongs to an intelligent house management system. The house-renting management system comprises a network server, an intelligent terminal and an intelligent lock body, wherein a database is arranged in the network server; the database at least comprises a lock body ID list, a user ID list and authorization relations between all lock body IDs and user IDs; the intelligent terminal is accessed to the network server via network; a lock cylinder main controller is arranged in the intelligent lock body and is accessed to a receiving device and a lock cylinder mechanical structure; landlords can remotely authorize the lock body IDs in the database of the network server through the intelligent terminal; tenants obtain dynamic unlocking keys through the intelligent terminal and can open the lock bodies through the dynamic unlocking keys. Through the house-renting management system capable of opening locks based on the Bluetooth or the two-dimensional codes and the method thereof, the operation is simple and convenient; the problem that the conventional keys are easily lost can be solved; meanwhile, the locks are opened by using the dynamic unlocking keys, so that the problem that the locks are changed when the tenants are changed can be solved; the house renting cost is effectively reduced; the conflicts between the landlords and the tenants can be reduced; and the rights of the landlords can be effectively guaranteed.

The invention discloses a high-power terahertz continuous wave two-dimensional imaging system which comprises a duplexer, a two-dimensional scanning platform, a terahertz continuous wave emitting module, a terahertz continuous wave receiving module, a TPX lens, a data collecting and processing module, an image processing module and an image display unit. The high-power terahertz continuous wave two-dimensional imaging system has the advantages that frequency exists at the terahertz wave band, the emitting power of the emitting module is high, and the system is simple in structure, small in size and high in resolution ratio.

The invention discloses a quick estimation and three-dimensional display method for visual green land areas of city floors. The method comprises the following steps of 1) calling a building layered modeling algorithm to perform base contour extraction and automated three-dimensional modeling on building digital surface model data so as to generate corresponding Shp graphic layer and Multipatch model; 2) calling a floor visual green land estimation algorithm to perform ornamental green land area automatic estimation on extracted building floors; 3) updating attribute fields of a building three-dimensional model and a building base contour model, and performing layered color-setting display. According to the method, a vertical city visual green land analysis concept is innovatively proposed, automated estimation and quick modeling display functions are realized at the same time, and manpower cost of actual measurement is reduced; and the method meets partial demands of people such as city residents, city planners, decision makers, house dealers and the like in related aspects of green landscapes, and has a certain social benefit and economic value.

The invention provides a digital identity authentication method based on a secure two-dimensional code, comprising that: the third party application initiates an authorization login request; the identity authentication SDK obtains a session key from the server; the identity authentication SDK encrypts the information of the third party application through the session key, and sends the encrypted information and the authorized login request to the server; the server decrypts through the session key to obtain the information of the third-party application, generates a two-dimensional code and atwo-dimensional code url, and encrypts the two-dimensional code url by using a key, and the identity authentication SDK obtains the encrypted two-dimensional code url; the identity authentication SDKdecrypts the encrypted two-dimensional code url, then the third-party application jumps according to the two-dimensional code url to display the two-dimensional code; and the user scans the two-dimensional code for authentication to authorize the third-party application to log in. The invention also provides a digital identity authentication system based on the secure two-dimensional code to ensure the security of the authorization process and the secure login of the third-party application.

The invention discloses a shopping guidance method for obtaining voices/videos through two-dimensional codes. The method comprises the following steps of: obtaining a voice/video of commodity introduction; matching the obtained voice/video of commodity into a two-dimensional code; placing the two-dimensional code on a commodity; and knowing the commodity through scanning the two-dimensional code to obtain the voice/video of the commodity introduction. According to the method, two-dimensional code voice/video shopping guidance can be carried out, and shoppers can obtain introduction informationof commodities anytime and anywhere, so that the requirement of knowing through seeing in the prior art is satisfied, and the vacancy of shopping guidance is filled; and through the method, the commodity purchasing opportunity is increased, and the future shopping market can be captured through a novel and convenient propagation manner.

The invention provides an automatic recognizing method and system for UAV aerial survey control points. The method comprises the following steps: manufacturing a portable and recyclable two-dimensional code control point device; recording a mapping relation of ground control point coordinate information and the two-dimensional code control point device into a record sheet; recognizing an image ofthe two-dimensional code control point device in each aerial survey picture through an image processing platform; then recognizing two-dimensional code recognizing code graphic in the image of each two-dimensional code control point device to obtain the device number; searching the record sheet through the image processing platform in order to obtain the ground control point coordinate informationcorresponding to the recognized device number, thus finishing the automatic recognizing process of the UAV aerial survey control points. The method and the system have the advantages that the structure is simple; the field operability is high; the operation is convenient; the two-dimensional code control point device is recyclable; the ground control point coordinates can be easily and automatically recognized in the aerial survey picture processing progress. Therefore, the aerial survey process is simplified, and as a result, the aerial survey picture processing efficiency is improved; the adaptability is high.

The invention discloses a library intelligent-management method based on two-dimensional codes. When a library purchases books, two-dimensional code labels are pasted on surfaces of the books, and basic information of the books is stored; the basic information of the books is scanned and obtained through a two-dimensional-code recognition module; a book storage module is arranged for warehouse-inregistration on the books newly purchased by the library; and a book borrowing registration module and a book returning registration module are arranged for modifying book status in book borrowing andreturning of readers, and storing the same to a book database to enable readers to carry out retrieval through a book query module to obtain status and location data of the books. An effect of quickly finding required books by the readers is facilitated, efficiency and rationality of book inventory management are improved at the same time, running efficiency of the library is greatly improved, and effective technical support is provided for reducing errors, saving manpower, reducing student book-taking time, and increasing teacher and student satisfaction degrees.

The invention provides a one-dimensional code encoding and decoding method which comprises the following steps: S1, converting a character string containing information of codes to be encoded into an initial byte array; S2, encrypting the initial byte array to generate an encrypted byte array; S3, converting the encrypted byte array into a character string containing one-dimensional code information. Through the one-dimensional code encoding and decoding method provided by the invention, the safety of the one-dimensional codes can be improved.

The invention discloses an indoor positioning method based on four-dimensional code mapping, and the method comprises the steps: (S100), carrying out the Kronecker product of a horizontal-dimensionalfeature vector matrix and a vertical-dimensional feature vector matrix, generating a feature vector matrix of an antenna group, mapping the feature vector matrix into a four-dimensional code, carryingout the matching, obtaining an approximate code word four-dimensional code, and obtaining a pre-coding matrix; (S200), performing beam forming on the base station transmitting signal according to theprecoding matrix of the mobile terminal; and (S300), forming a virtual cell taking the mobile terminal by the to-be-positioned mobile terminal and the antenna group as the center; and forming a van virtual cell taking the mobile middle end as the center with surrounding mobile terminals, constructing an estimation function to obtain a positioning target function, solving the positioning target function by adopting a nonlinear least square algorithm, and taking the coordinate when the positioning target function takes the minimum value as the coordinate of the to-be-positioned mobile terminal.According to the method, beam matching of four-dimensional code mapping is combined with a virtual cell cooperation mode, and indoor real-time space positioning is achieved.

The embodiment of the invention provides an explosive falling safety analysis method and device. The explosive falling safety analysis method comprises the steps: utilizing modeling software SolidWorks to perform three-dimensional modeling on a hemispherical explosive part; directing importing a model drawn in modeling software SolidWorks into an interface of finite element analysis software ANSYSWork bench through association, and carrying out material attribute addition and mesh generation; selecting three typical drop working conditions, setting boundary conditions, and simulating the dropof the hemispherical explosive part by using a display dynamics module Express Dynamic in an ANSYS Workbench; and carrying out safety analysis on the hemispherical explosive part according to a simulation result. According to the embodiment of the invention, the safety analysis conclusion of the explosive part can be safely and effectively obtained by simulating the explosive part under the condition that the explosive part falls off in three typical attitudes.