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65results about How to "Simplify complex issues" patented technology

Task splitting and mitigating learning prediction method based on multi-source domains

InactiveCN107103364AImplementing Heterogeneous Transfer LearningReduce complexityMachine learningDomain modelPredictive methods
The invention relates to a task splitting and mitigating learning prediction method based on multi-source domains. The goal of this method is to divide the domains involving the characteristic items of a target domain into corresponding sub-domains under the condition that a complex target task is difficult to train and learn with an extremely limited amount of target domain data so as to divide out the sub-tasks corresponding to the sub-domains. Through the domain characteristic amount corresponding to the sub-tasks, the sub-task model weights are calculated; through the use of the characteristic items required in the sub-domains corresponding to the sub-tasks, the characteristic mapping manner is utilized to establish the sharing characteristic space so that in ample multi-source domain sample, the sub-task models could be trained out; the associated characteristic item sharing parameter models are extracted to integrate initial target task models to be rapidly fit in combination with a gradient raising method to realize the task splitting and mitigating prediction. The invention serves as a cross-discipline model mitigating prediction method using the task splitting manner.
Owner:SHANGHAI UNIV +1

Water supply pipeline network partitioning method based on topology structure evolution

The invention relates to a water supply pipeline network partitioning method based on topology structure evolution, belonging to the management field of municipal works. In a method framework, a water supply pipeline network is regarded as a specific complex system, the topology structure is firstly abstracted out as an analysis object for determining a community structure formed during pipeline network evolution; secondly partitioning planning is performed according to an economic level goal made by an administrator based on community structure division, so as to generate a scheme; finally all schemes are optimized and the most economic scheme is determined under a condition that the water supply security is met. According to the invention, a scientific partitioning method which can be used as a theory basis is provided for the first time, and the method is easy and rapid to operate, thus having significant application value for partitioning planning practice and research in the future.
Owner:BEIJING UNIV OF TECH

Method for generating quadrangle finite element grid based on three-dimensional solid model

The invention discloses a method for generating a quadrilateral finite element grid based on a three-dimension entity model, which is applicable to the preprocessing stage of the finite element analysis. The method comprises the steps of encapsulating a three-dimension entity model in a cuboid containing box adapting to the shape of the model, subdividing the cuboid containing box into a certain quantity of cubic units, deleting the cubic units disjointed with the surface of the three-dimension entity model, dividing each cubic unit intersected with the surface of the three-dimension entity model into six mutually independent quadrilateral facets, deleting quadrilateral facets intersected with and arranged in the three-dimension entity, projecting four nodes on each quadrilateral facet arranged outside the three-dimension entity model onto the surface of the model and combining four new nodes obtained after the projection into a new quadrilateral facet, combining all the quadrilateral facets to obtain the quadrilateral grid of the three-dimension entity model and storing the generated quadrilateral grid data into a user-defined data file in the DPM format.
Owner:DALIAN POLYTECHNIC UNIVERSITY

Structuring method of relation model of resistivity and temperature and unfrozen water of frozen earth

The invention discloses a structuring method of relation model of the resistivity and temperature and the unfrozen water of frozen earth. The method comprises, firstly, preparing experimental equipment; secondly, performing drying condition experiments to obtain the relation between positive-temperature earth sample resistivity and instant moisture content; thirdly, performing freezing condition experiments to obtain the relation between negative-temperature earth sample resistivity and temperature; fourthly, performing relation reasoning of frozen earth unfrozen water content of different initial moisture contents and temperature at negative temperatures; lastly, establishing a relation model of the resistivity and temperature and the unfrozen water of frozen earth. The structuring method of relation model of the resistivity and temperature and the unfrozen water of frozen earth is simple in process, convenient to implement, capable of simplifying detection of frozen earth water content, accurate in measuring results, high in practicality, good in application effects and easy to popularize.
Owner:XIAN UNIV OF SCI & TECH

Aspect-oriented cloud storage engine construction method

The invention relates to an aspect-oriented cloud storage engine construction method. The aspect-oriented cloud storage engine construction method includes steps of 1, constructing a data access layer by design personnel according to the adopted type of database; 2, realizing aspect processing for data in the database by the design personnel; 3, analyzing service request by the design personnel, and operating aspect of the data to obtain aspect data; and 4, constructing a cloud storage engine on the basis of the aspect data constructed in the step 3 by the design personnel. Compared with the prior art, the aspect-oriented cloud storage engine construction method has the advantages that the concept of the data access layer is newly added into an existing cloud storage framework, the data access layer realizes the aspect processing for the data by the aid of the idea of aspect-oriented programming, data retrieval and data management efficiency is greatly improved, and complexity of data heterogeneity during processing of relational data and non-relational data is reduced.
Owner:UESTC COMSYS INFORMATION

Side slope slippage stability judgment method taking non-saturated region effect into consideration

ActiveCN108733961AAccurate, stable and safeAccurate settling timeDesign optimisation/simulationSpecial data processing applicationsReference modelEngineering
The invention discloses a side slope slippage stability judgment method taking non-saturated region effect into consideration. The method comprises the following steps (1), obtaining morphological characteristic information for researching a side slope and geological and hydrological parameters corresponding to side slope soil; (2), obtaining an initial condition in the side slope through segmented point obtaining actual measurement or through utilization of a side slope initial boundary condition simulation method; (3), simulating a subsequent hydrological process in the side slope accordingto corresponding change of a side slope boundary condition under side slope induction factor effect, and obtaining a water line in the side slope at each time; (4), calculating a real-time side slopestability coefficient through utilization of a side slope stability safety coefficient calculation formula, and drawing a side slope minimum stability safety coefficient change flow line; and (5) analyzing the earliest unstability time and a corresponding unstability area of the side slope according to the side slope minimum stability and security coefficient change flow line. According to the method, a relatively accurate real-time stability safety coefficient calculation result can be obtained, the method is used for judging stability of the side slope and predicting unstability time, and arelatively effective reference model for prediction and prevention of a side slope disaster is provided.
Owner:HOHAI UNIV

System and method for detecting content of unfrozen water in frozen soil based on soil mass resistivity variation

The invention discloses a system for detecting the content of unfrozen water in frozen soil based on soil mass resistivity variation. The system comprises a ground data transmission terminal, a computer and a temperature and resistivity detecting device which is placed in a soil mass, wherein the temperature and resistivity detecting device comprises one detecting unit or multiple detection units which are vertically stacked; the detection unit comprises a sleeve and a data acquisition circuit board; the data acquisition circuit board is integrated with a data acquisition and transmission circuit and a power line; the data acquisition and transmission circuit comprises a first microprocessor, a first data memory, a first wireless communication module, a temperature measurement probe and a resistivity measurement probe. The invention also discloses a method for detecting the content of the unfrozen water in the frozen soil based on the resistivity variation. According to the system and the method, disclosed by the invention, implementation is convenient, a complex problem of detecting the content of the unfrozen water in the frozen soil can be simplified, a measurement result is accurate, the instantaneity and the integrity are good, the practicability is high, the using effect is good, and popularization and use are convenient.
Owner:XIAN UNIV OF SCI & TECH

Multi-platform joint task planning method for complex observation tasks

ActiveCN111598473ASolve difficult problems that require large amounts of training dataHigh expected returnArtificial lifeResourcesGeowebArtificial intelligence
The invention provides a multi-platform joint task planning method for complex observation tasks. The method comprises the steps of preprocessing complex observation tasks and obtaining a plurality ofsubtasks corresponding to the geographic grids; constructing a multi-platform joint task planning model; substituting the plurality of sub-tasks preprocessed in the step 1 into a multi-platform jointtask planning model for solving; depending on solving results, outputting a task sequence of decomposing a complex observation task on each observation platform; according to the method, task preprocessing, optimal modeling, swarm intelligence and machine learning are organically combined, so that complex problems are simplified, experiments show that the multi-platform joint task planning time for complex observation tasks can be shortened to the minute level from the hour level, and the planning efficiency of multi-type observation platforms is effectively improved.
Owner:NAT UNIV OF DEFENSE TECH

Protection device for electrical life test of circuit breaker and operating mode of protection device

The invention discloses a protection device for an electrical life test of a circuit breaker and an operating mode of the protection device, and relates to a testing device for a circuit breaker. The device comprises a counter, a start button, a stop button, a timer TI, a timer TII, a timer TI output contact, a timer T II output contact, a timing output contact, a TI buzzer alarm, a TII buzzer alarm, a signal source and a power supply CHI. The operating mode comprises the following steps: executing a function debugging method, to be specific, establishing three corresponding failure models, and establishing corresponding mathematical function models for the three failure models for function debugging; then, starting the electrical life test of the circuit breaker. According to the device and the operating mode, an electrical life test process of the circuit breaker can be targetedly monitored and protected in real time, so that the defects in the prior art that the electrical life test process of the circuit breaker cannot be monitored and protected and no protection measures are provided in case of failures in the test process are overcome.
Owner:HEBEI UNIV OF TECH

Transforming method of random space vector PWM strategies

The invention discloses a transforming method of random space vector PWM strategies. When a randomized PWM strategy ST1 is transformed into a randomized PWM strategy ST2, a random number matrix of the ST1 is generated, calculation is carried out to obtain a digital signal SIG1 of an output voltage of an inverter, and a spectral characteristic value of the SIG1 is calculated; all elements of a random number matrix RS2 of the ST2 are set as unknown variables, an expression of a digital signal SIG2 of the output voltage of the inverter is calculated, and then a mathematic expression of a spectral characteristic of the SIG2 is calculated; and then a target function of transformation from the ST1 to ST2 is constructed and optimization is carried out, thereby obtaining a numerical value of the RS2. According to the technical scheme, mutual transforming between different random SVPWM strategies can be realized and the complex strategy can be transformed into the simple one; application of the random SVPWM technology and development of the new strategy can be realized conveniently; and thus the method has the great practical value.
Owner:HENAN POLYTECHNIC UNIV

Method for calculating settlement of composite single pile of post-grouting cast-in-place pile of extruded and expanded branch disc

The invention discloses a method for calculating settlement of a composite single pile of a post-grouting cast-in-place pile of an extruded and expanded branch discextruding and expanding branch disc.The invention, belongings to the technical field of building pile foundations. The invention provides a method for calculating settlement of a composite single pile of a post-grouting cast-in-place pile of an extruding and expanding branch disc. The adopted scheme is as follows: the method comprises the steps of 1. Tthe grouting cast-in-place pile is a single pile after the branch disc is extruded and expanded; or the piles are single-row piles, or the center distance of the sparse pile foundation is greater than 6 times of the pile diameter; pile foundation settlement calculation of the cast-in-place pile considers the influence of load sharing of foundation soil at the bottom of a bearing platform on pile foundation settlement. The settlement of the grouting pile composite single pile behind the squeezed branch disc is calculated as follows: the settlement is calculated as follows; superposing additional stress generated by calculation points of bearing platform bottom foundation counterforce and post-grouting cast-in-place pile side resistance and end resistance on a pile body axis below a pile end plane, calculating the settlement of a pile foundation by adopting a one-way compression layering summation method, and counting the pile body compression amount of a section part from a pile top to an upper disc top; the method is suitable for the field of settlement calculationof building pile foundations.
Owner:ZHONGBEI UNIV

Comprehensive energy system steady-state modeling method based on energy concentrator

The invention belongs to the technical field of electric power, and particularly relates to an integrated energy system steady-state modeling method based on an energy concentrator. The innovation ofthe method is as follows: 1) the method can be used for analyzing trans-regional, regional and user-level comprehensive energy systems, and has better applicability, universality and expandability; 2)the supply and demand characteristics of various energy sources are highly abstracted into energy source input and output balance consideration, and energy source coupling characteristics are described through elements in a coupling matrix, so that unification of physics and mathematics is realized; 3) the energy concentrator reflects the idea of energy equivalence, the energy coupling quantity can be converted into the output of a single energy system through an energy matrix, the decoupling of the coupling system is further realized, and the complex problem is simplified; and 4) the model not only can perform abstract modeling on the existing comprehensive energy system, but also can be used as an energy autonomous unit or a generalized node in an energy network to provide theoretical guidance for planning analysis of the comprehensive energy system.
Owner:TSINGHUA UNIV

Batch test method for semiconductor chips based on grayscale map of fault data

ActiveCN106680693AQuickly realize quality grading and sortingAchieving processing powerElectronic circuit testingQuality levelSemiconductor chip
The invention discloses a batch test method for semiconductor chips based a grayscale map of fault data. The method comprises the steps of 1) construction of a test data matrix X in which each batch comprises m chips, each chip includes n test parameters, test data of the batch includes m*n variable data, and the m*n test data matrix X is formed; 2) determination of quality classification and intervals in which quality classification and parameter intervals of each test parameter of the chip are determined; 3) coloring the test data matrix X according to quality classification and converting the matrix into a quality level matrix Q; 4) construction of the grayscale map of fault data in which each element in the quality level matrix Q serves as one element in a 2D planar image, and the grayscale map of fault data of the batch of chip test dataset is obtained; and 5) rapid chip quality level and defect parameter identification according to the grayscale map of the fault data. According to the method, test data of the semiconductor chips can be analyzed in a batch manner, the chip quality is leveled and sorted rapidly, and the chip defects are analyzed rapidly.
Owner:陈文芹

Intelligent controller for straw bioreactor and control method thereof

InactiveCN101847005ARealize fuzzy controlSolve fuzzy controlTotal factory controlProgramme total factory controlControl systemControl engineering
The invention discloses an intelligent controller, and particularly relates to an intelligent controller for an external straw bioreactor for protective land production and conversion from straws to carbon dioxide gas fertilizer. The intelligent controller for the straw bioreactor structurally comprises an air supply control system, a switch, a liquid discharge control system and a water level sensor, wherein the air supply control system sends working instructions to an air supply motor according to various different switch instruction; the switch sends working instructions to the air supply control system under different working conditions; the liquid discharge control system sends working instructions to a liquid discharge pump according to signals sent by the water level sensor; and the water level sensor transmits working signals to the liquid discharge control system after the water level reaches a set value. The intelligent controller has the characteristics of convenient setting, simple operation, convenient use, intelligence, high efficiency, small volume, flexible and convenient operation and safe use, and can greatly simplify the management program, simplify complex problems, enable a user to quickly master the management technical point of the straw bioreactor and reduce the production cost of the protective land of the user.
Owner:潘玉

Method for designing and maintaining three-color loop network structure of main routing system

The invention provides a design and maintenance method for a three-color ring network structure of a main routing system, belonging to the field of computer application technology. The method aims at solving the network routing problem between main routing node groups which represent each sub-administrative area under the same administrative area; the principle is that the network structure design uses the triangle element map coloring technique to classify the routing nodes of the main routing node network, thus establishing a three-color ring network structure; the routing strategy design is characterized in that color ring serial numbers are added to all routing nodes; furthermore, two middle routing lists are established for each routing node; a concept that a ring is combined with starts and the ring is regarded as the main is used, the adding of new nodes and correcting method when the link breaks are provided for the maintenance of the network routing system. The method avoids a plurality of troubles when the routing nodes are directly classified, simplifies the complex problems, saves routing addressing time, improves the network stability and has easy management and maintenance.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

A civil aviation emergency causal relationship analysis method based on a Bayesian network

PendingCN109886577AWeaken dependenciesSpeed ​​up message deliveryResourcesMessage passingUnexpected events
The invention discloses a civil aviation emergency causal relationship analysis method based on a Bayesian network. The method comprises the steps of firstly establishing a civil aviation emergency management field ontology as a Bayesian network model, and dedarizing the Bayesian network to obtain a Markov network; and then initializing the Markov network and iteratively optimizing the Markov network, taking the Markov network optimized in the last iteration as an optimal Markov network, and using the optimal confidence coefficient of each node in the optimal Markov network to evaluate the probability of the causal relationship of the civil aviation emergency. According to the method, the V-shaped structure in the Bayesian network is changed, the message transmission rate in the Markov network is increased in the reasoning process, and the causal relationship calculation complexity in a large-scale network is reduced; in the Markov network reasoning process, a cyclic confidence coefficient propagation algorithm is improved in combination with a differential privacy model, and the leakage of sensitive information during causal relationship reasoning in the civil aviation field is avoided.
Owner:SHAANXI NORMAL UNIV +1

Method for handling uncertainty of return results of trigger

ActiveCN102707956AAccurate processing of returned resultsClear structureSpecific program execution arrangementsProgram segmentOracle database
The invention mainly provides a method for handling uncertainty of return results of a trigger, relating to the technical field of computer software. The method specifically includes the following steps that first of all, a variable is stated and is assigned; when processing a cursor, the variable value is changed according to different numbers of the return results through the corresponding abnormal handlings conducted to different return results in an Oracle database, for example, the variable is 1 at the beginning, when the cursor returns one result, the value remains unchanged, when the cursor returns a plurality of results, the variable value is assigned to be 2 and when the cursor returns no result, the variable value is assigned to be 0; and finally different program segments are executed with respect to different variable values by judging the sentences. In such a way, the return results are of clear structure and are simple and explicit, and therefore the trigger can accurately handle the return results of the cursor, the complicated problem is simplified and the expected target is accomplished. The invention aims to solve the technical problem of providing a method for handling the uncertainty of the return results of the trigger so as to ingeniously solve the problem of uncertainty of the return results of the trigger of a database by analyzing the results.
Owner:福建汇智数字通达科技有限公司

Hot backup dual-redundancy electro-hydraulic servo valve control system based on pipeline fluid parameter design

The invention relates to a hot backup dual-redundancy electro-hydraulic servo valve control system based on pipeline fluid parameter design. A constant-pressure valve is arranged on an inlet of an electro-hydraulic servo valve to ensure stable differential pressure between a fluid on the inlet and a fluid on an outlet, according to the differential pressure between the fluid on the inlet and the fluid on the outlet and required maximum flow, the diameter of an inlet and outlet pipe is matched through selection, and meanwhile an adapter block is designed to connect two independent electro-hydraulic servo valve pipelines in parallel to construct the hot backup dual-redundancy electro-hydraulic servo valve control system. No dual-redundancy electro-hydraulic servo valve exists in the domestic market at present, and compared with the prior art, the hot backup dual-redundancy electro-hydraulic servo valve control system has the advantages that the urgent requirement for the dual-redundancy electro-hydraulic servo valve of an existing high-reliability system is met, switching between two electro-hydraulic servo valves when faults occur is avoided through the constructed hot backup electro-hydraulic servo valve, and reliability of the system is improved; the problems that at present, a domestic dual-redundancy electro-hydraulic servo valve is low in design, manufacturing, machining technology levels and low in reliability are solved, the complex problems are simplified, development cost and risks are reduced, and the development period is shortened.
Owner:AIR FORCE UNIV PLA

Lateral rigidity enhancing structure of open section of subway entrance

The invention belongs to the field of deep foundation pit engineering, and discloses a lateral rigidity enhancing structure of an open section of a subway entrance. The lateral rigidity enhancing structure comprises a bottom slab, two main body side walls, top beams, two rows of fender posts, ring beams and joint bars. The two main body side walls are arranged on the bottom slab, and a U-shaped structure is formed by the two main body side walls and the bottom slab jointly. The tops of each row of fender posts bear the corresponding top beam, and the top of each top beam is flush with the top end face of the corresponding main body side wall of the U-shaped structure. Each main body side wall and the adjacent top beam jointly form a ring beam bearing structure. Each ring beam bearing structure bears the corresponding ring beam. The top beams and the ring beams are connected through the multiple joint bars. The lower ends of the joints bars are anchored into the top beams, and the upper ends of the joint bars stretch into the ring beams. The lateral rigidity enhancing structure has the advantages that construction is convenient and fast, the amount of steel bars is small, investment is reduced, and structure safety and the waterproof effect are guaranteed, and has great application prospects in the field of deep foundation pit engineering including subways.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP

Method for performing information acquisition and recognition and verification for calligraphy and painting artwork entity

The invention discloses a method for performing information acquisition and recognition and verification for a calligraphy and painting artwork entity, a solidifying type grid template is combined with a calligraphy and painting image, and a whole image grid template equally divided into several parts, a preselected recognition point marked area image is displayed in the manner of graded magnification, and graded guiding is executed until a recognition area and a preset standard archival image are displayed accurately, an operator accurately performs comparative analysis on the received archival image and a clearly photographed recognition image with a reference, the same template is used for acquisition of archival information and in-situ calligraphy and painting recognition, locating isaccurate and error is extremely small, moreover, and a result of comparative analysis is taken as a basis for judging authenticity of a to-be-verified artwork. In a word, the method provided by the invention is not related to middle transition and connection operations, thus, operation technical difficulties are simplified, diversified authentication devices are provided, and authentication efficiency is improved effectively.
Owner:朱建宗

Water supply pipeline network partitioning method based on topology structure evolution

The invention relates to a water supply pipeline network partitioning method based on topology structure evolution, belonging to the management field of municipal works. In a method framework, a water supply pipeline network is regarded as a specific complex system, the topology structure is firstly abstracted out as an analysis object for determining a community structure formed during pipeline network evolution; secondly partitioning planning is performed according to an economic level goal made by an administrator based on community structure division, so as to generate a scheme; finally all schemes are optimized and the most economic scheme is determined under a condition that the water supply security is met. According to the invention, a scientific partitioning method which can be used as a theory basis is provided for the first time, and the method is easy and rapid to operate, thus having significant application value for partitioning planning practice and research in the future.
Owner:BEIJING UNIV OF TECH

Tester for single-particle intrusion into relative interface

The invention discloses a device for testing single-particle intruding into a relative interface, comprising a test bench (1), a static interface (6), a guide rod (10), a rotating interface (7) arranged on the test bench (1), a connecting mechanism (5), a clamping mechanism (4) fixedly connected with the static interface (6) and a rotating mechanism (8) driving the rotating interface (7). The clamping mechanism (4) is fixedly connected with the static interface (6) and enables the static interface (6) to contact with the rotating interface (7) in an inclination angle; one end of the guide rod (10) is connected with the connecting mechanism (5) through a bearing, and the other end is fixed in the center of a single particle (9) in a penetrating way; the single particle (9) is arranged in the inclination angle; the guide rod (10) is parallel to the rotating interface (7) and points to the rotating center of the rotating interface (7); the clamping mechanism (4) is provided with a first transducer; and the connecting mechanism (5) is provided with a second transducer and a third transducer.
Owner:XI AN JIAOTONG UNIV

Method for detecting content of unfrozen water in frozen soil

The invention discloses a method for detecting the content of unfrozen water in frozen soil. The method comprises the following steps: 1, connecting detection equipment; 2, carrying out data acquisition and transmission; and 3, processing data to obtain the unfrozen water content of the frozen soil. The frozen soil unfrozen water content prediction neural network model is adopted for data processing, the detection result can be directly obtained when detection data are input, the method is simple in step and convenient to implement, and the method can be used for frozen soil unfrozen water content measurement based on the resistivity, temperature and humidity of frozen soil. The method can simplify the complex problem of unfrozen water content detection of frozen soil, and is accurate in measurement result, high in practicability, good in use effect and convenient to popularize and use.
Owner:李新春

An estuary region low-salt water taking judgment method

PendingCN109840313ASimplify complex issuesImprove the defect of relying on historical salinity valuesComplex mathematical operationsComplex problemsSalinity
The invention relates to a low-salt water taking scheduling method for estuary regions. The method comprises the following steps: when predicting the salinity of a low-salt estuary, breaking through traditional daily average salinity prediction; carrying out time-by-time salinity research, meanwhile, introducing a gamma function to generate a historical weight effect, and innovatively introducinga logistic regression mode, so the complex problem of time-by-time salinity prediction is simplified, the method is characterized in that the method is simple, convenient, practical and innovative, and a more convenient reference model is provided for research of the salt tide upstream problem.
Owner:HOHAI UNIV

Patented technology life cycle analysis method

The invention belongs to the technical field of patent analysis and more particularly relates to a patented technology life cycle analysis method based on component analysis. The invention provides apatented technology life cycle analysis method based on principal component analysis (PCA) which is a common statistical method. The patented technology life cycle analysis method reduces the dimension of a multi-index variable to a few comprehensive indexes to perform patent life cycle analysis and research, thereby simplifying the analysis and research of problems and achieving objectivity and rationality.
Owner:HEBEI UNIV OF ENG

Ionic rare earth mining prediction method and system based on water environment capacity

The invention belongs to the technical field of mining and particularly relates to an ionic rare earth mining prediction method and system based on water environment capacity. The mining prediction method comprises the following steps of collecting mine basic data, and the mine basic data comprises basic attribute data of a to-be-mined block, basic attribute data of a drainage basin, water qualitymonitoring attribute data, meteorological attribute data and basic attribute data of a pollution source; calculating the ammonia nitrogen concentration of the ionic rare earth mining surface water based on the collected mine basic data; decision making being conducted on mining of the ionic rare earth mine based on the ammonia nitrogen concentration, and the mining amount being reduced in the mining year when the ammonia nitrogen concentration is larger than 1 mg / L. The prediction method can accurately reflect the space-time dynamic change of the non-point source pollution caused by the dispersive mining of the rare earth ore, simplifies the complex problem, and is simple and convenient to operate.
Owner:BEIJING MINING & METALLURGICAL TECH GRP CO LTD

Drainage gas production effect fuzzy comprehensive evaluation method based on entropy evaluation method

The invention discloses a drainage gas recovery effect fuzzy comprehensive evaluation method based on an entropy evaluation method, aiming at the characteristics of a foam drainage gas recovery well,indexes for evaluating the foam drainage gas recovery effect are selected, and a foam drainage gas recovery effect evaluation index system is constructed by following the principle of combining qualitative analysis and quantitative analysis. The mutual relationship between the evaluation indexes of the gas well drainage gas recovery effect is considered, a membership matrix is created by adoptinga linear analysis method, the index weight is confirmed by adopting an entropy evaluation method, and the comprehensive evaluation index of the gas well foam drainage gas recovery effect is calculatedby combining a fuzzy comprehensive evaluation method. by using the method provided by the invention, more scientific, accurate and objective evaluation information can be obtained.
Owner:NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1

Fermat's grand theorem demonstration model

ActiveCN107919040ASimplify the proof processSave proof timeEducational modelsElectric lightFifth power
A Fermat's grand theorem demonstration model is disclosed and relates to the field of teaching of mathematics in primary, secondary and tertiary schools and the field of scientific research. The invention is aimed at constructing a mathematical model for Fermat's grand theorem and solving two problems of mathematics teaching and popularization of science; the demonstration model consists of a number of rectangular square (1), a number of universal Integrated circuit boards (2), a number of positive Integer nth power formula plates (3), a number of touch screen switch cover plates, a third power display panel (5), a fourth power display panel (6), a fifth power display panel (7), a sixth power display panel (8), a seventh power display panel (9), an eighth power display panel ( 10), a ninthpower display panel (11), an nth power universal display panel (12), an nth power variant four-color display panel (13) and a base seat (14); the third power display panel (5), the fourth power display panel (6), the fifth power display panel (7), the sixth power display panel (8), the seventh power display panel (9), the eighth power display panel (10), the ninth power display panel (11), the nth power universal display panel (12), the nth power variant four-color display panel (13) and the base seat (14) are made via via a Fermat inequality parameter method and an assembly display panel method; all display panels are orderly inserted horizontally into opposite grooves of inner sides of wall panels erected before and after the base seat (14); different colors of the rectangular squares on the display panels or lights of electric lights in an integrated circuit are used to show Fermat inequalities and demonstrate that Fermat's grand theorem is true, and the positive integer n is greater than or equal to 3.
Owner:李中平

A rapid construction method for a double-tower five-span steel box truss cable-stayed bridge

The invention discLoses a quick construction method for a twin tower five cross steeL box trussed beam cabLe-stayed bridge, and beLongs to the technicaL fieLd of steeL box trussed beam cabLe-stayed bridge construction in bridge construction; the technicaL purpose is to provide the quick construction method for the twin tower five cross steeL box trussed beam cabLe-stayed bridge capabLe of effectiveLy controLLing the profiLe of the bridge and increasing the construction speed and the accuracy of joining two sections of the bridge. The method comprises the foLLowing steps that two side portionsof the bridge are firstLy compLeted; a guiding beam and a steeL beam structure are weLded towards the sidespan side by utiLizing top pushing equipment, and three sections of a steeL box beam are Leftbehind to instaLL a steeL trussed beam untiL one side portion of the cabLe-stayed bridge is compLeted; after top pushing is conducted on the two sides of the bridge to the suitabLe pLace, residuaL sections are erected to a joining section, the joining section is instaLLed, after the instaLLment of the joining section is compLeted, fuLL-bridge cabLe adjusting is conducted, temporary piers are dismantLed, and the fuLL-bridge profiLe is adjusted; the method can be appLied to the fieLd of the construction of twin tower five cross steeL box trussed beam cabLe-stayed bridges.
Owner:CHINA RAILWAY NO 3 GRP CO LTD +1
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