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50results about How to "Avoid unreasonable" patented technology

Automatic pipe feeding and steel distribution device

The invention relates to the technical field of pipe production and machining, in particular to an automatic pipe feeding and steel distribution device. The device comprises a supporting rod, a conveying structure, a lubricating structure, a material distribution structure, a buffering structure and a feeding structure; through the arrangement of the material distribution structure, pipes laid flat on the conveying structure can be singly extracted, so that the situation that the no pipe is distributed or multiple pipes are distributed during material distribution can be avoided, the one-by-one distribution efficiency of the pipes is improved, the effect of improving the production rhythm is achieved, and the buffering structure is further arranged on the material distribution structure, so that the pipes rolling down from the material distribution structure can be fully buffered, impact damage caused by direct rolling down of the pipes can be avoided, the pipes are protected, the pipes roll into the feeding structure, the pipes can be vertically conveyed through the feeding structure, it is guaranteed that a spraying production line is a pipe one-by-one spraying production line, and the pipes uniformly arranged on an arrangement bed are conveyed one by one, so that the spraying efficiency and quality can be greatly improved.
Owner:SHANDONG BAIRUI ENVIRONMENTAL PROTECTION & TECH

A transmission welding gear strength and fatigue life calculation method

ActiveCN109885901AImprove accuracyAvoid duplication of research and developmentSpecial data processing applicationsNeedle roller bearingStatic strength
The invention discloses a transmission welding gear strength and fatigue life calculation method, including the finite element analysis modeling, the strength calculation and the fatigue life calculation. The finite element analysis modeling is to establish the finite element models of a transmission shaft, a synchronizer gear hub, a gear sleeve, a combination gear ring, a welding gear and a needle roller bearing, the strength calculation is characterized in that the top of the gear is taken as a zero point, one point is clockwise taken on a pitch circle at the gear meshing position at intervals of 20 degrees to serve as a loading position, and the stress results at different meshing positions are calculated. According to the fatigue life calculation, the fatigue life of all the torque levels is superposed according to the calculation results of the static strength at different meshing positions, so that the fatigue life of the welded gear under the corresponding load spectrum is obtained. According to the method, the accuracy of the strength calculation and the fatigue life calculation of the welded gear is improved, the defects in the prior art are overcome, the repeated researchand development are avoided, the social resources are saved, and the technical progress is promoted.
Owner:GETRAG JIANGXI TRANSMISSION

Safe spike sequencing and conveying mechanism

PendingCN111153161AFall into easyRealize the first time sortingConveyor partsEngineeringStructural engineering
The invention discloses a safe spike sequencing and conveying mechanism. The safe spike sequencing and conveying mechanism comprises a storage hopper, a transferring device, a material arranging railand a conveying device, wherein safe spikes flow out of the storage hopper and flow into the material arranging rail through the transferring device, the material arranging rail is driven to vibrate and feed through a direct vibrator, the material arranging rail comprises an inclined bottom plate and two side plates, a spike rod groove for a spike rod to fall into is formed in the middle of the inclined bottom plate, the positions, on the two sides of the spike rod groove, of the inclined bottom plate are respectively provided with a rod falling groove communicating with the spike rod groove,the rod falling grooves are provided with guide corners, spike rods on the inclined bottom plate fall into the rod falling grooves, the guide corners guide the spike rods into the spike rod groove, the tail end of the material arranging rail is provided with a baffle and a screening port, the screening port is used for guiding safe spikes with indicating caps hung on the inclined bottom plate to pass through and be input into the conveying device for sequencing after being guided by a guide rail, a sliding outlet is arranged on the side plate positioned on the lower side of the inclined bottomplate, and the safe spikes blocked by the baffle slide out of the sliding outlet and return to the storage hopper or the transferring device through a material returning device.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST

Multi-grid cutter shaft optimization method based on density clustering

The invention, which belongs to the related technical field of milling processing, discloses a multi-grid cutter shaft optimization method based on density clustering. The optimization method comprises the following steps: (1), carrying out standardization processing on a cutter contact coordinate to solve a problem of an unreasonable clustering result caused by unreasonable variation value of thearc length; (2), carrying out density clustering on a cutter contact after standardization processing; and (3), calculating a coarse grid corresponding to the cutter contact based on an obtained clustering group, optimizing cutter shafts of coarse grid points based on the coarse grid, establishing a refined grid between every two adjacent coarse grid points, optimizing cutter shafts of the refined grid points based on all refined grids, and thus completing cutter shaft optimization. According to the invention, standardization processing and density clustering are carried out on the cutter contacts successively; and the cutter shafts after overall optimization are obtained by integration of coarse grid optimization and refined grid optimization. Therefore, the convergence speed of the algorithm is greatly improved while the cutter shaft optimization effect is not reduced; and the practicability is high.
Owner:HUAZHONG UNIV OF SCI & TECH

Preliminary testing method for floor vibration comfort based on heart rate change

The invention relates to the field of floor comfort testing, in particular to a floor vibration comfort preliminary testing method based on a heart rate change. The method comprises the steps of obtaining a heart rate standard value of a tester on a standard vibration frequency floor, wherein the heart rate standard value is used for reflecting the comfort level brought to the tester by the standard vibration frequency floor; obtaining a heart rate reference value of the tester on a to-be-tested floor, wherein the heart rate reference value is used for reflecting the comfort level brought to the tester by the to-be-tested floor; if the heart rate reference value is smaller than or equal to the heart rate standard value, determining that the comfort index of the to-be-detected floor is qualified, otherwise, determining that the comfort index of the to-be-detected floor is unqualified. The comfort level of the tester on the floor with the standard vibration frequency serves as a reference standard, the comfort level of the tester on the to-be-tested floor with an unknown vibration frequency is compared with a standard comfort level, whether the to-be-tested floor reaches the standardor not is judged, and the discomfort of residents due to the fact that substandard floors are adopted in a building is prevented.
Owner:HEFEI UNIV OF TECH

Method for determining longitudinal dispersion coefficient based on space-time matching tracer test of sampled data

The invention discloses a method for determining a longitudinal dispersion coefficient based on a space-time matching tracer test of sampled data, comprising the steps of firstly, selecting a representative river section from a natural river to measure hydrological parameters thereof, and determining a reasonable sampling station according to the mixing-length theory; secondly, capturing a concentration peak, and determining a sampling time series matched with the concentration peak; thirdly, carrying out a tracer test, and sampling at a downstream station to obtain a corresponding concentration data sequence; and finally, solving an optimization problem by using a river water quality model coupled golden section method to calculate an optimal solution, i.e., the longitudinal dispersion coefficient of the river. The sampling time matches well with the sampling position, invalid data sampling at the initial stage and long tail stage of a skewed distribution curve is discarded, the sampling cost is saved while the parameter estimation accuracy is satisfied, the shortcomings of subjectivity and strong human intervention in the traditional method are overcome, and a key technical support is provided for accurately and quickly determining the longitudinal dispersion coefficient of the river and improving the precision of the water quality model.
Owner:HOHAI UNIV

Steel structure curtain wall positioning and mounting deviation rectifying method based on BIM three-dimensional laser scanning

The invention discloses a steel structure curtain wall positioning and mounting deviation rectifying method based on BIM three-dimensional laser scanning. The method comprises the steps of collectingfield data of a civil structure, and determining three-dimensional coordinates of an original point of the civil structure; guiding the collected field data into BIM software to build a three-dimensional model of the civil structure; designing a model of a single curtain wall unit in the BIM software; simulating mounting of the curtain wall on the three-dimensional model, and judging whether collision exists between the adjacent curtain wall units; generating coordinates of each curtain wall unit, mapping the coordinates on the civil structure, and according to the coordinates of each curtainwall unit, mounting a curtain wall on the civil structure; S600, collecting the field data of the civil structure with the curtain wall again, guiding the data into the BIM software to be compared with the three-dimensional model of the civil structure with the curtain wall, screening out the curtain wall units with mounting which does not fit the rule, and performing remounting. The mounting precision of the curtain wall is greatly improved, and irrationality of curtain wall design and mounting positions can be avoided.
Owner:CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP

Temperature control cooling device and cooling method for photovoltaic glass panel of solar daylighting skylight

The invention provides a solar daylighting skylight photovoltaic glass panel temperature control cooling device which comprises a water conveying pipe frame strip, a water collecting tank frame strip, a water guide frame strip and a waterproof sealing structure which are assembled and combined into a closed frame body, and the closed frame body is matched with at least one solar daylighting skylight photovoltaic glass panel in shape and size. The water storage tank is fixed on the outer periphery of the photovoltaic glass panel in use, and a water containing space is formed on the upper surface of the photovoltaic glass panel. The cooling device provides jet water flow on the outward glass surface of the photovoltaic glass panel for cooling, solves the problem of unreasonable arrangement of a cooling structure heat transfer system in the prior art, also cleans the outer surface of the photovoltaic glass panel, and is beneficial to improving the sunlight receiving efficiency of the photovoltaic glass panel; the cooling effect is good, the original appearance modeling of the lighting window is not interfered at all, and the cooling device does not influence the attractiveness of the original design at all. The invention further provides a cooling method.
Owner:GUANGZHOU JANGHO CURTAIN WALL SYST ENG +2

Craniocerebral CT angiography image processing method and device, medium and electronic device

The invention relates to a craniocerebral CT angiography image processing method and device, a medium and an electronic device. The method comprises the following steps: performing three-dimensional contour extraction on brain tissues in a target craniocerebral CT angiography image to obtain a three-dimensional brain tissue image; inputting the three-dimensional brain tissue image into a pre-constructed segmented model to obtain an initial segmented blood supply area image; acquiring a hidden space including the anatomical features of the segmented blood supply area; and correcting the initial segmented blood supply area image according to the hidden space. In this way, the multiple segmented blood supply areas can be automatically obtained only by inputting the three-dimensional brain tissue image corresponding to the target craniocerebral CT angiography image into the segmentation model, and the segmentation efficiency is remarkably improved. Besides, the hidden space including the anatomical features of the segmented blood supply area is fused into the correction process of the segmentation result, so that the problem that the segmentation result is unreasonable in the aspect of the anatomical structure due to the fact that the segmentation model cannot learn the anatomical features of the segmented blood supply area in the training stage can be avoided, and the segmentation precision is guaranteed.
Owner:沈阳东软智能医疗科技研究院有限公司

Incomplete information reasoning method with mode switching mechanism

The invention provides an incomplete information reasoning method with a mode switching mechanism. The incomplete information reasoning method comprises the following steps: selecting effective attribute information, determining a decision variable, and constructing a modular switching reasoning evidence network model; determining an identification framework, and initializing a network model; calculating and initializing a reliability distribution function among the node variables according to the logic relation of the node variables; carrying out completeness degree judgment on the input evidence at the current reasoning moment, selecting an input mode in combination with an evidence type, carrying out evidence reliability function correction according to the input mode, and adjusting the network model; inputting the correction evidence, adaptively adjusting node weights and updating a reliability distribution function between the nodes; carrying out network reasoning by using a three-step space-time fusion mechanism to obtain probability distribution of decision variables under an identification framework of the decision variables; a normalized mathematical expectation of the decision variable is calculated. In the face of a complex decision problem under mixed incomplete information, a continuous and accurate reasoning result can be given, and the autonomy and intelligence of a decision system are comprehensively improved.
Owner:SHENYANG AEROSPACE UNIVERSITY
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