冰壶推拉助力器

扇子（驱蚊扇子）

伸缩篮球架

Method and device for determining point cloud filtering threshold value, point cloud filtering method and device and mine car

The invention provides a point cloud filtering threshold determining method and device, a point cloud filtering method and device and a mine car, and relates to the technical field of point cloud data processing. The method for determining the point cloud filtering threshold comprises the following steps: constructing a target function of the point cloud filtering threshold according to a relationship between a ratio of the number of residual point cloud points after filtering of a point cloud point set to the total point number of the point cloud point set and an expected ratio; and solving the objective function by using a solving algorithm constructed according to a fireworks algorithm so as to determine the point cloud filtering threshold. Through the method, the point cloud filtering threshold value can be quickly and accurately determined on the engineering, and then the point cloud data can be quickly and accurately filtered on the engineering based on the point cloud filtering threshold ...

Agricultural scientific and technological achievement application value evaluation model construction method based on SN and EMT

The invention provides an agricultural scientific and technological achievement application value evaluation model construction method based on SN and EMT, and relates to the field of agricultural scientific and technological achievement application value evaluation. The method comprises: according to a to-be-evaluated target agricultural scientific and technological achievement and a market user demand characteristic index, determining an evaluation index system of the target agricultural scientific and technological achievement and endowing the evaluation index system with a weight; determining SN demander recommendation data of the target agricultural achievement; calculating an EMT index of the target agricultural scientific and technological achievement according to the evaluation index system of the target agricultural scientific and technological achievement and the SN demander recommendation data; judging whether the EMT index meets a preset requirement or not; and if the EMT index ...

Evaluation method, device and equipment for operating cost per ton of oil and storage medium

The invention discloses a method, device and equipment for evaluating the operation cost per ton of oil and a storage medium, and the method comprises the steps: obtaining the predicted water content in a current economic evaluation period, the historical well opening number of a to-be-evaluated oil field in N years before the current economic evaluation period, the historical crude oil commodity amount, the historical single well fixed cost and the historical liquid change cost per ton; and inputting the predicted water content, the historical well opening number, the historical crude oil commodity amount, the historical single well fixed cost and the historical ton liquid change cost into a pre-constructed cost evaluation model for analysis to obtain the ton oil operation cost in the current economic evaluation period. The ton oil operation cost of different stages is obtained along with decreasing of the yield and increasing of the water content in different development stages in the ...

Heat pump rectification system and method for DMC synthesis

The invention discloses a heat pump rectification system and method for DMC synthesis. The heat pump rectification system comprises a rectification tower, a tower top evaporator, a flash tank and a heat pump compressor unit. The rectifying tower comprises a tower top and a tower kettle; the tower top evaporator is provided with a first input end, a second input end and a first output end, and the first input end is communicated with the tower top; the flash tank comprises a third input end and a second output end, the third input end is communicated with the tower kettle, and the second output end is communicated with the second input end; the heat pump compressor unit comprises a fourth input end and a third output end, the fourth input end is communicated with the first output end, and the third output end is communicated with the tower kettle. According to the heat pump rectification method, the heat pump rectification system is adopted, the tower top gas phase serves as a heat source ...

Agricultural scientific and technological achievement evaluation database system

The invention provides an agricultural scientific and technological achievement evaluation database system, and relates to the field of agricultural scientific and technological achievement evaluation database systems. The agricultural scientific and technological achievement evaluation database system comprises an application layer, a service layer and a data layer, and the application layer comprises an evaluation database, an achievement browsing subsystem and an auxiliary function subsystem; the service layer comprises an evaluation database engine service component, and the service component is used for providing evaluation database service for the application layer; the data layer comprises an evaluated agricultural scientific and technological achievement database resource database, a transacted agricultural scientific and technological achievement database and an application database. According to the invention, evaluation meta-indexes and indexes can be dynamically increased and ...

Mine unmanned vehicle path navigation method and device, computer equipment and storage medium

The invention relates to a mine unmanned vehicle path navigation method and device, computer equipment and a storage medium. The mine unmanned vehicle path navigation method comprises the following steps: generating a plurality of initial paths on a cost map according to starting point information and terminal point information; according to the sum of the cost values of all the grids passed by each initial path, determining the path cost value of the initial path; a fusion path optimization algorithm is adopted to optimize the multiple initial paths, the optimized path with the minimum path cost value serves as the optimal path of the unmanned vehicle, and the fusion path optimization algorithm comprises at least two path optimization algorithms; and navigating the unmanned vehicle according to the optimal path of the unmanned vehicle. According to the invention, various path optimization algorithms can be fused, so that the global optimization ability of the algorithm is improved, and ...

Asset quality evaluation method and device, electronic equipment and storage medium

The invention provides an asset quality evaluation method and apparatus, an electronic device and a storage medium. The method comprises the steps of obtaining index data corresponding to each index in an index system by a petroleum company; performing normalization processing on the index data to obtain target data; and inputting the target data into a pre-established asset quality evaluation model to obtain an asset quality score of the petroleum company, so that the asset quality of the petroleum company can be evaluated, and the accuracy of asset quality evaluation can be improved.

Deformable wrench mechanism

The invention belongs to the technical field of aero-engines, and particularly relates to a deformable wrench mechanism which is composed of a main body framework, a deformation control mechanism, a deformation fixing mechanism and a positioning mechanism, and the main body framework controls the main body framework to deform and extend into a rotor inner cavity and is connected with an inner cavity bolt; the deformation fixing mechanism is installed in the main body framework to enable the main body framework to be kept in a fixed state and transmit torque, the positioning mechanism facilitates torque transmission and positioning of the wrench, the scheme that the size of the wrench is reduced is replaced, and therefore the strength and rigidity of the wrench are guaranteed. And the wrench penetrates through the narrow space through deformation and returns to the working state after reaching the installation position of the bolt, installation of the bolt in the rotor is completed, and ...

Oil and gas asset value reduction limit processing method and device, computer and storage medium

The invention provides an oil and gas asset value reduction limit processing method and device, a computer and a storage medium. The method comprises the steps of obtaining a to-be-tested index value of a to-be-tested object; obtaining a multivariate linear regression model predetermined according to the sample index value of the sample object and the model subtraction value; and inputting the to-be-tested index value of the to-be-tested object into the multiple linear regression model for fitting to obtain an asset reduction value of the to-be-tested object. The asset reduction value is obtained through quantification of the multiple linear regression model, so that the actual requirements of research of different companies, different samples and different evaluation periods can be met, and the universality, comparability and practicability are high. The result can provide important basis for operation and decision-making of petroleum companies.

Preparation method of multi-layer laminated structure negative electrode of lithium primary battery

The invention relates to a preparation method of a lithium primary battery multi-layer laminated structure negative electrode, which comprises the following steps: punching a metal lithium negative electrode sheet: punching and leading out a tab body, and pressing a rough surface below tab glue; cutting a lithium ribbon narrow strip, and coating the periphery of the rough surface with the lithium ribbon narrow strip to prepare a lithium ribbon narrow strip coating layer; compacting the lithium strip narrow strip coating layer, and pressing out a rough surface to prepare a lead-out tab; and placing the lead-out tabs in the middle of the stacked multiple layers of metal lithium negative plates, attaching the lead-out tabs to the connecting tabs corresponding to the metal lithium negative plates, and compacting the lead-out tabs and the multiple layers of stacked negative plates to complete the multi-layer laminated structure of the negative electrode. According to the invention, not only ...

Closed bus bridge device for preventing short circuit caused by rainwater

The invention relates to a closed bus bridge device capable of preventing short circuit caused by rainwater. The closed bus bridge device comprises a long box body, wherein three rows of pillar porcelain bottles are arranged on the inner bottom surface of the long box body along a length direction, a bus bar is arranged at the top of each row of pillar porcelain bottles, safety intervals are arranged among the three bus bars, the bottom surface of the long box body is respectively provided with a drain hole corresponding to each busbar, the bottom of the long box body is provided with two slideways at the two sides of each drain hole, a movable sliding plate is arranged between the two slideways, and the sliding plate is used for sealing the drain holes. According to the invention, safe operation of a bus bridge can be ensured, and maintenance is convenient.

Method and system for operating and maintaining transformer substation by using robot

The invention provides a method and a system for operating and maintaining a transformer substation by using a robot. The method comprises the steps that an operation and maintenance instruction is received, and target operation and maintenance equipment is determined according to the operation and maintenance instruction; planning an operation and maintenance path according to the first data of the robot and the second data of the substation; and controlling the robot to perform operation and maintenance work on the target operation and maintenance equipment according to the operation and maintenance path. According to the scheme, the robot is adopted to carry out operation and maintenance operation on related equipment of the transformer substation, the safety problem of manual operation is avoided, and the method has very high market application prospects.

Traditional Chinese medicine composition for treating ischemic stroke and preparation method thereof

The invention discloses a traditional Chinese medicine composition for treating ischemic stroke and a preparation method thereof. The traditional Chinese medicine composition is prepared from the following raw materials in parts by weight: 5-25 parts of gastrodia elata, 5-25 parts of uncaria rhynchophylla, 5-25 parts of polygala tenuifolia, 5-25 parts of rhizoma acori graminei, 5-20 parts of lumbricus, 5-15 parts of fried stiff silkworm, 5-20 parts of rhizoma atractylodis, 3-15 parts of rhizoma pinellinae praeparata and 3-9 parts of coptis chinensis. The traditional Chinese medicine composition has the functions of extinguishing wind, dredging collaterals, reducing phlegm and inducing resuscitation, and is used for treating ischemic stroke caused by wind-phlegm obstructing collaterals. The traditional Chinese medicine composition has the advantages of exact curative effect, high safety, small dosage, high compliance and the like. Animal experiment research shows that the traditional Chinese ...

Steel scrap structure retreatment device of electric furnace

The invention discloses a waste steel structure retreatment device of an electric furnace, and particularly relates to the technical field of steel structure waste treatment equipment.The waste steel structure retreatment device comprises a workbench, fixing devices are arranged on the two sides of the upper end of the workbench, and a limiting device fixedly connected with the upper end of the workbench is arranged on one sides of the middles of the two fixing devices; a transmission device fixedly connected with the upper end of the workbench is arranged on one side of the limiting device. According to the waste steel structure retreatment device of the electric furnace, the fixing devices are arranged, waste steel in the electric furnace is placed between the two fixing devices, and a first hand wheel is rotated to drive the fixing device away from a transmission device to move through a first threaded rod; according to the steel scrap retreatment device for the electric furnace, the ...

Stable equipment for reducing silicon in metallized pellets

The invention discloses metallized pellet silicon reduction stabilizing equipment, and particularly relates to the technical field related to metallized pellet silicon reduction, the metallized pellet silicon reduction stabilizing equipment comprises an outer cylinder, a motor is arranged in the middle of the upper end of the outer cylinder, and the output end of the motor penetrates through the top wall of an inner cavity of the outer cylinder and is provided with a rectangular transmission shaft rotationally connected to the bottom wall of the outer cylinder through a coupler; four stirring plates are uniformly arranged on the outer surface of the rectangular transmission shaft, a rotating circular ring is arranged on the outer side of the top wall of an inner cavity of the outer cylinder, six rectangular rotating rods are uniformly arranged at the lower end of the rotating circular ring, and scraping plates tightly attached to the inner surface of the outer cylinder are arranged on the ...

Technological method for machining wedge-shaped locking block and clamp thereof

The invention discloses a process method for machining a wedge-shaped locking block and a clamp of the wedge-shaped locking block. The process method comprises the steps that S1, a plate is prepared; s2, blanking the plate material; s3, performing heat treatment on the plate as a blank; s4, numerical milling 1: numerical milling the blank, drilling to form an unthreaded hole and a threaded bottom hole, and tapping the threaded bottom hole; s5, numerical milling machining 2, wherein the machined blank is cut off; s6, surface passivation treatment; s7, performing final inspection; the clamp for machining the wedge-shaped locking block comprises a clamping seat, a pressing plate, a first locking screw and a second locking screw, a clamping through groove, a first threaded hole and a mounting hole are formed in the clamping seat, and a second threaded hole is formed in the pressing plate; the technical method is improved, the contents of multiple procedures are combined, the clamping frequency ...

Anti-winding mechanical automatic rope arranger

The invention discloses an anti-winding mechanical automatic rope arranger which comprises a base, a front frame body and a rear frame body are arranged on the base, a driving motor is fixedly connected to one side wall of the front frame body, a winding shaft is fixedly connected to the output end of the driving motor, and the winding shaft is rotationally connected with the front frame body and the rear frame body. A winding assembly is arranged on the winding shaft, and supporting rods are fixedly connected to the front frame body and the rear frame body. The winding shaft can drive the rotating wheel to move back and forth in the direction of the lifting base and drive the rotating wheel to move in the vertical direction at the same time through the transmission structure, and the back-and-forth moving speed, namely the moving speed in the vertical direction, of the rotating wheel is related to the rotating speed of the winding shaft; the speed of the rotating wheel moving back and ...