381 results about "Horizontal axis" patented technology

The invention discloses a current transformer distortion current reconstruction method based on a U-I trajectory curve, and the method comprises the following steps: carrying out the synchronous sampling of a voltage value and a current value at a measurement point, and carrying out the per-unit processing; constructing a coordinate system taking the current value after per unit processing as a horizontal axis and the voltage value as a longitudinal axis in the two-dimensional coordinate, and drawing a U-I track curve; analyzing U-I track curve characteristics of the current transformer in a normal operation state, a transient state and a steady state; linear transmission sections of transient saturation and steady saturation are identified; and taking sampling points in the linear transmission section as input values, restoring a U-I trajectory curve by using an ellipse fitting algorithm, extracting current values corresponding to abscissas on the restored U-I trajectory curve, and arranging the current values according to a time sequence to realize current reconstruction. According to the method, the reconstruction of the CT secondary distortion current is realized through a least square ellipse fitting method by utilizing the similarity between a U-I trajectory curve and an elliptic curve during normal linear transmission. The problem that the differential protection adaptability is reduced or even fails due to distortion current is effectively prevented, and the protection stability is effectively improved.

The invention relates to the technical field of vehicle body posture leveling control, and provides a vehicle body posture leveling control method and system for an electric mountain transport vehicle, and the method comprises the steps: obtaining ground contact state data and a transverse shaft rotation angle in real time, and carrying out the contact terrain analysis according to the ground contact state data to obtain terrain parameter information; carrying out vehicle load distribution analysis according to the ground contact state data and the terrain inclination parameters to obtain pressure gravity center shift data; adjusting the horizontal axis rotation angle according to the pressure center-of-gravity shift data to obtain a target horizontal axis rotation angle; according to the target horizontal axis rotation angle and the terrain pressure distribution data, carrying out wheel bearing demand analysis to obtain a wheel pressure adjustment strategy; and driving the suspension system to level the posture of the vehicle body according to the wheel pressure adjusting strategy. The terrain environment change can be sensed in real time based on the wheel ground contact state change and the vehicle gravity center shift monitoring mechanism, the rotation angle of the transverse shaft and the wheel ground contact pressure are accurately adjusted, and self-adaptive leveling of the vehicle body posture is achieved.

This method is applicable to the technical field of bridge construction and provides a method for real-time monitoring and evaluation of the force-bearing state during the casting process of a steel-pipe concrete arch bridge. The solution involves identifying environmental background points in the RGB three-dimensional matrix for the entire bridge within the range between the maximum and minimum RGB values ​​in the local RGB three-dimensional matrix for the steel pipe, representing environmental background temperature points in the temperature information matrix, and identifying concrete pouring points based on whether the unit matrix condition for the temperature of the steel dome pipe is met. The system also obtains the horizontal axis of the pixel at the center of the poured liquid surface in the left and right half arches in a Cartesian coordinate system, divides the entire arch rib to be poured into 2n equal parts, and calculates the cross-sectional displacement response of each structure based on the cross-sectional displacement caused by the load action of each segment. This allows for real-time, efficient, and accurate observation of the difference in concrete liquid surface level on both sides, allowing for the structural response during pouring to be determined and reducing the construction risk of arch bridges.

The invention relates to the technical field of aero-engine quality inspection, and discloses an aero-engine part machining quality detection method based on data management. The method comprises the following steps: collecting multi-source machining data of a part, wherein the multi-source machining data comprises dimensional tolerance, surface roughness and material hardness data; key quality features are extracted according to a design drawing, and the key quality features and the multi-source processing data are subjected to time sequence alignment according to process stages; a three-dimensional mass space model with the process stage as the horizontal axis, the key quality features as the longitudinal axis and the multi-source machining data as the depth axis is constructed, and a mass distribution thermodynamic diagram is generated; identifying an abnormal process region based on the thermodynamic diagram, extracting a corresponding data subset, inputting the data subset into the dynamic convolution kernel quality analysis network, and outputting a process abnormal probability value; when the probability value exceeds a threshold value, triggering cross-process correlation analysis, and fusing upstream and downstream process data to generate a composite quality feature vector; and an abnormal type is judged through a cascade classifier, and a compensation strategy library is called to generate a machining parameter adjustment instruction set.

A fixing tool is used for fixing a drainage tank, and the horizontal axis coordinate of the drainage tank is adjusted by transversely moving a first fixing piece. The vertical axis coordinate of the drainage groove is adjusted by vertically moving the second fixing piece; the third fixing piece stretches out and draws back in the longitudinal direction to adjust the longitudinal axis coordinates of the drainage groove, the fixing tool can accurately adjust the coordinates of the drainage groove, it is ensured that the drainage groove is kept in the vertical state, and the measuring precision is improved. And meanwhile, compared with a manual fixing mode, a tool fixing mode is adopted, so that the position of the flexible shaft in the track of the drainage channel is relatively fixed, and the friction force measurement precision can be further improved.

The invention relates to the technical field of refrigeration equipment state monitoring and data analysis, and discloses a freezer remote monitoring and fault prediction system, which comprises the steps of intercepting operation data of a freezer in a door closing silence period, calculating an environment dew point temperature sequence and extracting a unit temperature difference load fluctuation ratio sequence of a refrigeration system; based on the time change rate of the environment dew point temperature sequence and the unit temperature difference load fluctuation ratio sequence, an instantaneous cross bispectrum coupling potential energy sequence representing the nonlinear modulation relation of the time change rate and the unit temperature difference load fluctuation ratio sequence is constructed; then, a two-dimensional phase space hysteresis track is constructed with the environment dew point temperature sequence as the horizontal axis and the instantaneous cross bispectrum coupling potential energy sequence as the longitudinal axis, and the cross bispectrum hysteresis entropy of the dew point driving type load volatility is calculated based on the probability density distribution of the track and the directed circulation area; and finally, judging an operation state and outputting a fault prediction result by verifying whether the entropy value is within a historical reference interval.

The invention provides a seismic activity analysis method and system based on Matlab software. The method comprises the following steps: arranging a broadband sonic sensor array to collect original data of the depth of a seismic source; the data is divided into equidistant grids based on Matlab, a depth and frequency histogram is constructed, the horizontal axis is an equidistant depth grid, the longitudinal axis records the original frequency of the seismic event in each grid, and nonlinear features are reserved; calculating the sound wave propagation time difference of the same seismic event, and if the time difference inversion depth is within a preset tolerance range, marking the data as valid data; performing unsupervised classification processing on the effective data and the original frequency of the histogram based on Matlab, iteratively dividing a space seismic cluster, and generating a classification boundary; and combining the classification boundaries with the geographic coordinates to output a classification boundary map, and distinguishing shallow source and deep source earthquake dominant regions by color blocks. According to the method, the accuracy of automatic division of the shallow earth crust seismic source depth distribution mode and the geographical visualization expression efficiency are improved.

The invention provides a method for constructing a physical field of a horizontal axis water turbine blade of an agent model, and relates to the technical field of digital twinning. According to the method, rotating speed data of a water turbine under different flow velocity conditions are determined, and rotating speed values corresponding to all flow velocities are obtained; then, fluid-solid coupling simulation is carried out in combination with experimental data, and stress and deformation data of the water turbine blade under the actual operation working condition are further obtained; according to the method, the KNN algorithm is utilized to carry out order reduction processing on the obtained blade structure data, a plurality of grid points are combined into representative points, the calculation complexity is low, the processing requirement of graph rendering software on the data size in the real-time rendering process is met, a combined Kriging method is adopted to carry out digital twinning agent model training on the data after order reduction, and the real-time rendering efficiency is improved. The reconstruction of a real-time physical field of the blade is realized; iteratively optimizing the digital twin physical field proxy model according to a genetic algorithm, and solving the problem of deviation between the proxy physical field model and a real physical model; and finally, deploying the digital twin physical field agent model into a digital twin system and solving physical field distribution in real time.

The invention relates to the technical field of operation and maintenance management, and discloses a historical building operation and maintenance management method and system based on digital twinning, and the method comprises the steps: building a digital substrate based on historical data and point cloud, dividing a monitoring region according to a bearing structure, value elements and a function space, and associating an identifier. And mapping the operation data to a corresponding component storage space according to the area to which the operation data belongs, and forming a dynamic operation and maintenance file and a monitoring data stream. And performing visual coding on the data stream by taking the acquisition time as a horizontal axis and the spatial topology as a longitudinal axis to generate a spatial-temporal distribution map. And determining an abnormal area according to fluctuation form difference and trend deviation degree of real-time and historical data in the map, and binding identifiers and time periods to generate an abnormal list. Updating the file by taking the list as an index, and matching the disease record with a historical maintenance record to generate an operation and maintenance management scheme; the efficiency of historical building operation and maintenance management based on digital twinning can be improved.

A fully automatic leveling system for a deck theodolite comprises: a leveling device, on which a deck theodolite is arranged and which is configured to adjust a horizontal axis system of the deck theodolite on the basis of a control instruction from a leveling controller; a first gradienter, which is arranged on the deck theodolite and configured to read and provide to the leveling controller the levelness of the deck theodolite in a certain direction; a reference plane extension device, which is arranged on a ship datum plane and configured to acquire values of levelness deviation between the reference plane extension device and the ship reference plane in different directions and provide the values of levelness deviation to the leveling controller; a second gradienter, which is arranged on the datum plane extension device and configured to read and provide to the leveling controller the levelness of the ship datum plane in a certain direction; and the leveling controller, which is configured to automatically rotate and adjust the deck theodolite on the basis of the read values of levelness deviation between the horizontal axis system of the deck theodolite and the ship reference plane, thus achieving automatic leveling of the deck theodolite by means of repeat iterations.

To provide a metal plate that can improve the positional accuracy of through-holes when a metal mask is installed on a frame, a method for manufacturing the metal plate, as well as the metal mask and a method for manufacturing the metal mask through use of the metal plate.SOLUTION: Provided is a metal plate to be used for manufacturing a metal mask. In a graph in which an arbitrary position n in a width direction of the metal plate is plotted on a horizontal axis and in which a differential expansion rate En in a unit length L0 in a longitudinal direction is plotted on a vertical axis, a maximum inclination of the differential expansion rate E in a central portion in the width direction is 1.8×10 -3 / m or less, and the central portion is a portion that occupies 80% in the width direction excluding both side portions that each occupy 10% in the width direction.SELECTED DRAWING: Figure 1A

The invention provides a differentiated service classification and multi-path traffic scheduling method and system, and belongs to the technical field of network communication, the quintuple, packet size and timestamp characteristics of each data packet are captured in real time, a timestamp is mapped to an image horizontal axis, the packet size is mapped to a longitudinal axis after standardization, and discrete data is converted into a continuous visual mode; classifying the traffic in the network by using a pre-trained classification model, and distributing corresponding service requirements and priorities for each traffic type; distributing an INT data packet for each path, and detecting and monitoring the time delay, throughput and packet loss rate of the path in real time; and selecting an optimal path by adopting a CMAB algorithm in combination with the priority of the flow, the service demand, the real-time performance of the path and historical scheduling feedback. According to the invention, comprehensive path quality evaluation is realized; the high-priority service is ensured to obtain stable and high-quality transmission quality; and the accuracy and robustness of path selection are improved.

In a first aspect of the present invention there is provided a method of repowering a horizontal-axis wind turbine comprising a tower, a nacelle located rotatably at the apex of the tower, and a rotor having a hub and at least three used blades mounted pitchably to the hub and extending radially therefrom, the method comprising the steps of uninstall the at least three used blades from the hub, install at least three repower blades to the hub, each repower blade extending between a root and a tip, and each repower blade further comprising a connection point located between the root and the tip, install a plurality of blade connecting members, each blade connecting member being connected between corresponding connection points of a pair of repower blades; and install a tensioning system with the hub, the tensioning system being configured to adjust a tension in each blade connecting member.

The invention discloses a buried pipeline base reaction force calculation model and a structural calculation method thereof, and relates to the technical field of trench-buried structure base reaction force calculation, the reaction force calculation model is a trapezoidal model, and the trapezoidal model is constructed by the following steps: establishing an x-q'coordinate system, taking a coordinate origin o as a pipeline vertex position in the x-q 'coordinate system, and calculating the pipeline base reaction force in the x-q' coordinate system; and constructing a trapezoidal model by taking the horizontal rightward direction of the pipeline as the positive direction of an abscissa axis x and the vertical downward direction of the pipeline as the positive direction of a ordinate axis q '. According to the buried pipeline base reaction force calculation model and the structural calculation method thereof, the base reaction force calculation model is provided, a pipeline deformation and stress calculation formula under the model is obtained, base reaction force distribution is in a trapezoidal distribution form, and compared with a traditional method, the structural calculation method has the advantages that the structure is simple, and the calculation efficiency is high. The coincidence degree of a substrate reaction calculation model, a finite element and a test result is better, and errors are reduced.

We provide an information processing system that can analyze the results of risk investigations. [Solution] According to one aspect of the present invention, there is provided an information processing system comprising at least one processor, the processor being configured to execute each of the following steps by reading a program, wherein in an investigation result acquisition step, results of multiple risk investigations on the person being evaluated are acquired, in an item reception step, input of a first item and a second item for analyzing and displaying the multiple results is received from the evaluation user, and in an analysis information display control step, analysis information is displayed for each of multiple display areas of a coordinate system having the first item as the horizontal axis and the second item as the vertical axis, showing the number of results including the content of the first item and the content of the second item corresponding to the coordinates of the display area, and the display areas are areas obtained by dividing the planar area of ​​the coordinate system along at least one of the horizontal axis and the vertical axis.

The invention relates to the technical field of data reasoning, and discloses a mining equipment intelligent manufacturing production scheduling optimization system and method.The system comprises a topological graph generation module, an initial scheduling Gantt chart generation module, a demand strength coefficient acquisition module, a flexible scheduling Gantt chart acquisition module and a final scheduling instruction set generation module; constructing a topological graph based on the process relation of the mining equipment; generating an initial scheduling Gantt chart by taking the part task set as a longitudinal axis and the corresponding general assembly line task sequence as a transverse axis; when a disturbance event occurs, an affected process dependence tree is extracted, task delay cost is evaluated, and a requirement strength coefficient for rescheduling in the manufacturing process is output; generating a flexible scheduling Gantt chart based on the process beat deviation and the equipment utilization rate in the synchronous adjustment manufacturing process; determining a final scheduling instruction set through process path dynamic correction and process optimization results; the efficiency of the mining equipment manufacturing and production process scheduling scheme can be improved.

To provide a filter capable of reducing pressure loss at time of air passing.SOLUTION: A filter in which a metal-organic framework is supported on a substrate, wherein the filter that has undergone a specific pretreatment (a) and a water adsorption treatment (b) satisfies the following requirements (R1) and (R2) when air at high temperature and low humidity is passed through it at a predetermined airflow rate. Requirement (R1): Obtain graph P, where the horizontal axis represents time (seconds) and the vertical axis represents the cumulative amount of water desorbed per gram of filter (g), and graph Q, where the horizontal axis represents time (seconds) and the vertical axis represents the temperature (°C) of the air downstream of the filter, grasp the time t (seconds) at which the air temperature downstream of the filter reaches its lowest point T on graph Q, and the absolute value of the slope of the straight line connecting the point (t, P(t)) on graph P at time t and the origin is 9×10-4 or greater. Requirement (R2): The cumulative amount of water desorbed after 600 seconds is 0.133 g or more per gram of filter.SELECTED DRAWING: None

The invention relates to the field of printed matter detection, and discloses a printed matter-based double-sided detection device, which comprises a mounting bracket, a mounting ring with a horizontal axis is arranged on the mounting bracket, a conveying assembly is arranged in the mounting ring through a connecting assembly, and a driving assembly is arranged on the mounting bracket. The driving assembly is used for driving the conveying assembly to rotate around the axis of the mounting ring, the conveying assembly comprises two conveying units with the conveying direction parallel to the axis direction of the mounting ring, the two conveying units are arranged in the vertical direction, and the distance between the two conveying units is smaller than the thickness of a to-be-detected printed object; each conveying unit is divided into an overlapping section and an open section in the conveying direction, the overlapping section of the upper conveying unit is located over the overlapping section of the lower conveying unit, the open sections of the two conveying units are oppositely arranged, and the upper portions of the open sections of the two conveying units are each provided with an optical detection unit.

The invention discloses an aircraft surface waviness measurement and analysis method and system, and the method comprises the steps: scanning the surface of an aircraft according to a planned path through employing a three-coordinate measuring machine and a scanning probe, obtaining scanning data, and obtaining the scanning data for evaluation through employing a segmented scanning and segment-to-segment direct splicing mode for a hole, a pin and other structural parts; fitting based on scanning data to obtain a point deviation data set, calculating corresponding point arc length data based on the point deviation data and the point coordinate data on this basis, and drawing a graph by taking a horizontal axis as the point arc length data and a longitudinal axis as the point deviation data; and determining the surface waviness of the airplane by combining the derivative at the intersection point of the point deviation data curve and the transverse axis and the distance between the wave crest and the wave trough, thereby realizing the efficient and accurate measurement of cavities, welding seams and other obstacle structures on the outer surface of a large-scale airplane part or the whole machine and the accurate calculation of the waviness.

The invention relates to the technical field of tunneling equipment, in particular to transverse shaft type tunneling equipment and a spraying flow distribution mechanism thereof. The spraying flow distribution mechanism of the transverse shaft type tunneling equipment comprises a fixing assembly and a rotating assembly, the rotating assembly comprises a fixing base and an end cover which define a water pressure cavity, and the fixing assembly comprises a connecting shaft extending into the water pressure cavity through the fixing base and a flow distribution disc installed on the connecting shaft and located in the water pressure cavity. A matching face used for being attached to the valve plate is arranged on the fixing base, a water channel is arranged in the connecting shaft, the water outlet end of the connecting shaft is located on the side, facing the end cover, of the valve plate, the end cover is provided with a rotating installation hole and an end cover water channel, and the water outlet end of the connecting shaft is rotatably installed in the rotating installation hole. The end cover water channel communicates with a water outlet of the water outlet end of the connecting shaft and the water pressure cavity. The axis position of the connecting shaft is guaranteed, the coaxiality of the rotating assembly and the fixing assembly is guaranteed, and eccentric wear between the matching faces of the valve plate and the fixing base due to installation deviation is not prone to occurring.

The invention provides a coordinate conversion method for a plurality of crystal grains on a wafer, which comprises the following steps: firstly, mechanical absolute coordinates of the crystal grains on the wafer are provided, the mechanical absolute coordinates comprise horizontal axis coordinates and vertical axis coordinates, and one of the horizontal axis coordinates and the vertical axis coordinates is a non-integer; secondly, the amplification factor is calculated, the amplification factor is the ratio of the minimum longitudinal distance to the minimum transverse distance between two adjacent crystal grains, and the ratio is larger than 1; and finally, relative coordinates are calculated, and the relative coordinates are obtained by multiplying non-integer coordinates in the horizontal axis coordinates and the longitudinal axis coordinates in the mechanical absolute coordinates by the amplification factor and then replacing the non-integer coordinates with the non-integer coordinates.

To suppress a pitching action caused by a pull car.SOLUTION: A pull cart 4 is coupled behind a bicycle 2, and towed. The pull cart 4 comprises a cart body 41 and a deck part 45 supported by the cart body 41. The cart body 41 comprises: a wheel support part 42 which pivotally supports a pair of wheels 44 to the right and left across the deck part 45; and a fitting part 40 which fits a long-sized coupling part 3 to a front part, the coupling part 265 having a structure such that a base end part 32 is pivoted on a vertical axis and a tip part 33 is pivoted on the bicycle on a horizontal axis in a right-left direction. The fitting part 40 has a bearing part 401 which pivots the base end part 32 of the coupling part 3 on the front part so that the tip part 33 of the coupling part 3 is located before axle position of the rear wheel 24 of the bicycle 2.SELECTED DRAWING: Figure 1

To provide a drum type ice-making machine which can suppress growth of ice on both end surfaces of an ice-making drum and can continue to efficiently produce ice for a long time.SOLUTION: A drum type ice-making machine 1 includes a tank 3 for storing ice-making water W, an ice-making drum 5 rotating around a horizontal axis J in a state of being partially immersed in the ice-making water W in the tank 3, a driving device 6 for rotating the ice-making drum 5 around the horizontal axis J, a cooling device 7 for cooling the ice-making drum 5, and a blade 8 for scraping ice adhered to the ice-making drum 5. The ice-making drum 5 includes a columnar drum body 51 extending along the horizontal axis J and partially immersed in the ice-making water W in the tank 3. Further, the blade 8 includes a first blade 81 extending along the horizontal axis J and facing an outer peripheral surface of the drum body 51, and a pair of second blades 821, 822 facing both ends in a direction along the horizontal axis J of the outer peripheral surface of the drum body 51.SELECTED DRAWING: Figure 3

The utility model relates to an automatic magnetic shoe arranging device which comprises a conveyor, a plurality of material guiding assemblies are arranged at the material conveying end of the conveyor, a material arranging assembly is arranged on the sides, away from the conveyor, of the material guiding assemblies, the material arranging assembly comprises a U-shaped arranging frame, a material arranging sleeve, a first moving part and a second moving part, and an arranging cavity used for containing a plurality of magnetic shoes is formed in the U-shaped arranging frame. The discharging sleeve is connected into the arranging cavity in a sliding mode, an arranging guide groove matched with the magnetic shoes is formed in the discharging sleeve, the magnetic shoes are guided into the arranging guide groove by the conveying machine through the material guiding assembly, and the first moving part is used for driving the discharging sleeve to move in the vertical axis direction of the discharging sleeve; the second moving part is used for driving the discharging sleeve connected with the first moving part to move in the horizontal axis direction of the U-shaped arranging frame. According to the magnetic tile arranging device, a plurality of magnetic tiles can be automatically arranged in the arranging cavity and stored, time and labor are saved, and the working efficiency is improved.

A three-dimensional (3D) printing system includes a print engine and a resin vessel. The print engine includes a pair of support plates in facing relation that define a receiving space therebetween. The pair of support plates include a pair of profiled ramps and a pair of hooks extending into the receiving space. An outer surface of the resin vessel includes a plurality of fixed rollers and a pair of cam rollers. The plurality of fixed rollers are configured to partially engage the pair of profiled ramps when the resin vessel is translated into the receiving space. In response to being revolved about the horizontal axis, the pair of cam rollers are configured to engage the pair of hooks and to lift and translate the plurality of fixed rollers into complete engagement with the pair of profiled ramps.

The invention provides a pipe discharging method and system. The method comprises the steps that a head end wire frame of a to-be-discharged part pipe at the current moment is obtained to serve as a to-be-compared wire frame at the current moment, and a comparison wire frame at the current moment is obtained; moving the minimum position of the to-be-compared wireframe at the current moment on the horizontal axis to the maximum position of the to-be-compared wireframe at the current moment on the horizontal axis to obtain a pipe arrangement position; dispersing the three-dimensional wireframe of the pipe arrangement position into a plurality of line segments, and based on a preset reset starting point, unfolding the plurality of line segments into a two-dimensional wireframe; and based on a preset comparison algorithm, if the two-dimensional wireframe meets the edge sharing requirement, the to-be-arranged part pipes at the current moment are arranged into the whole discharging pipe according to the two-dimensional wireframe, the tail end wireframe of the to-be-arranged part pipes at the current moment is updated to be the comparison wireframe at the next moment, and the pipe discharging process is ended. According to the method, a three-dimensional discharging algorithm is converted into a two-dimensional discharging algorithm, the discharging processing process is simplified, and the reliability of a discharging result is improved.

The present invention relates to the field of window production technology, and in particular to a window production process with a lighting lamp, comprising a conveying device, a clamping device, an intercepting device and a cutting device, wherein the conveying device stops moving when it moves the window to the bottom of the cutting device, the intercepting device intercepts one side of the window, and then a first driving device drives the first movable plate to move, and the first movable plate moves toward the middle of the supporting plate. The movement of the first movable plate drives the horizontal axis to rotate through the first connecting rod, and the two first movable plates and the second movable plate move toward the middle at the same time, driving the top clamping plate to accurately align and position the two sides of the window. After completion, the cutting device cuts the outer periphery of the window glass. There is no need to manually carry the window, and assembly line cutting can be achieved, which solves the technical problem that traditional windows are manually carried, then carried to the clamping table, and then manually positioned, and cannot be positioned and clamped on the conveyor belt, resulting in low efficiency.

A horizontal axis rotational force generator is introduced, utilizing fluid flow to drive motion. The system includes one or more rotating mechanisms, each with multiple blades positioned at equal phase angle intervals. These blades revolve around a horizontal shaft while simultaneously rotating around parallel sub-shafts when exposed to fluid pressure, producing torque on the main shaft. A support structure holds the shaft and allows stable axial rotation at designated heights. A gear interlocking unit adjusts angular velocities, shifting blade revolution speeds to half their value in the opposite direction, and transfers the result to the main shaft. As blades pass vertically above the shaft, their orientation is controlled so that surfaces align horizontally or vertically relative to the shaft. This ensures blades consistently generate maximum rotational force on the horizontal plane, efficiently converting fluid flow into usable mechanical energy.

Described herein is a method and system for tracking one or more objects within a field of view (FoV) of a vehicle using an adaptive region of interest (ROI) within the FoV. The method includes identifying a first ROI within the FoV of the vehicle based on sensor data. The method further determines a yaw angle with respect to a horizontal axis of the vehicle based on a change in the steering angle of the vehicle. Thereafter, the method identifies a second ROI within the FoV by modifying the coordinates of the first ROI. Furthermore, the method evaluates the second ROI using a predefined evaluation technique to determine whether the one or more objects are within the second ROI. By way of example, and without limitation, the predefined evaluation technique may include a polygon area method.Finally, the method tracks the one or more objects in the second ROI based on the evaluation.

The utility model relates to the technical field of water conservancy, in particular to a surface water sampling device which comprises a top plate, and the bottom of the top plate is connected with two ropes through a bidirectional winding mechanism; the bidirectional winding mechanism comprises a vertical plate, a transverse shaft, a wire coil, a gear, a motor, a support and a fixed pulley. The number of the vertical plates is two, the two vertical plates are fixedly connected to the top of the top plate, the number of the transverse shafts is two, the two transverse shafts are rotationally connected to the front faces of the two vertical plates through bearings correspondingly, the number of the wire coils is two, and the two wire coils are fixedly connected to the middles of the two transverse shafts correspondingly. The top ends of the two ropes are wound on the two wire coils respectively, the motor drives the left transverse shaft to rotate, the left transverse shaft rotates to drive the two wire coils to rotate simultaneously and reversely, and the two ropes are wound, so that surface water can be sampled twice at the same time, and the sampling efficiency is improved when a large number of surface water samples are needed.