118 results about "Gravitational force" patented technology

The invention discloses a satellite time-varying gravity field inversion method based on adaptive de-mixing, and belongs to the technical field of satellite gravity measurement. Constructing a normal equation; accumulating the normal equations and solving parameter initial values through a weighted least square method; calculating a post-test residual error of the observation value and recovering a pre-elimination parameter; applying zero mean constraint to the daily time-varying gravity field parameters; establishing an autoregressive model to describe time correlation of the day solution sequence, applying autoregressive model constraint, updating a normal equation and jointly solving a time-varying gravity field model; outputting a daily time-varying gravity field model and a monthly time-varying gravity field model according to a parameter estimation result; evaluating the time-varying gravity field model through spectral domain analysis; according to the satellite time-varying gravity field inversion method based on self-adaptive de-mixing, self-adaptive de-mixing errors can be achieved, the stability and precision of time-varying gravity field inversion are improved, and the influence of background model mixing errors in satellite time-varying gravity field inversion is effectively weakened.

The invention discloses a dynamic coupling model generation method. The method comprises the following steps: setting a reference point and arranging an observation pillar; transmitting the reference gravity value to an observation pillar; acquiring space pose change data and three-dimensional coordinate data of the marker; obtaining relative gravity combined measurement data through relative gravity combined measurement; calculating the three-dimensional displacement of each observation pillar based on the spatial pose change data; fusing the reference gravity value, the relative gravity combined measurement data and the three-dimensional coordinate data to construct a gravity gradient field tensor model; systematically integrating the three-dimensional displacement, the gravity gradient field tensor model and the three-dimensional coordinate data to form a space correlation framework; and on the basis of a physical coupling mechanism of constraint displacement and gravity gradient of the conditional least square model, combined adjustment calculation is carried out to generate a dynamic coupling model of interaction of the deformation field and the gravity field. Space-time reference unification of displacement and gravity data is realized, rotation errors and local interference are eliminated, the reliability of a gravity gradient field is enhanced, and a coupling mechanism of deformation and gravity is physically constrained.

The invention relates to a large underground cavern group crustal stress field inversion method under a complex geological condition, and provides a method for inversing a crustal stress field of a large underground cavern group by taking a river valley center line or a ridge line as an inversion numerical model boundary to solve the problems that underground cavern group crustal stress measured data is discrete and difficult to accurately predict under the background of deep river valley terrain and multi-fault development. And selecting actual measurement points which are far away from the fault and are in three-dimensional distribution. The method comprises the following steps: acquiring a displacement boundary and a gravitational acceleration magnitude of a three-dimensional numerical model through limited measured data by adopting stepwise multiple linear regression and evolutionary neural network joint inversion, positively loading the displacement boundary and the gravitational acceleration magnitude to a model boundary to obtain a regional crustal stress field, and extracting measured point data for preliminary verification; and simulating caving excavation, and analyzing whether the stress concentration area is consistent with the observed stress type damage position or not. The method integrates the advantages of the two methods, more optimal solutions can be selected, the problem that precision and calculated amount are difficult to consider in stress field prediction of the complex structure motion area is solved, and the method is suitable for crustal stress field prediction of the complex structure area.

The invention discloses a critical parameter prediction method for a vertical cantilever fluid conveying pipe comprising a water injection pump and a Y-shaped nozzle, and relates to the field of fluid conveying pipe critical parameter calculation. The prediction method is based on an Euler-Bernoulli beam model and a momentum theorem, bending force, centrifugal force, Coriolis force, inertia force, gravity and additional force generated by an elbow are comprehensively considered, and an oscillatory differential equation of the fluid conveying pipe is established. The method comprises the following steps: performing dimensionless processing on an oscillatory differential equation by introducing dimensionless parameters, deducing a characteristic equation, a characteristic function and a characteristic value under a cantilever boundary condition, converting a partial differential equation into an ordinary differential equation set, and performing matrix solution; and finally, accurate prediction values of the critical flow velocity and the critical frequency can be obtained. The method can effectively reflect the influence rule of the nozzle and the concentrated mass on the vibration characteristics of the fluid conveying pipe, and realizes the accurate prediction of the critical parameters of the vertical cantilever containing the concentrated mass belt Y-shaped nozzle fluid conveying pipe.

The invention provides a boundary force control method and device based on gravitational equilibrium, equipment and a medium, and relates to the technical field of medical instruments. The method comprises the steps that current position information of a joint in a mechanical arm of a master console is obtained, and whether the joint enters a preset limiting buffer area or not is judged based on the information; and if so, dynamically generating a boundary force for preventing the joint from moving towards the mechanical hard limit based on the current position information and the gravitational equilibrium force of the joint. The boundary force is dynamically generated based on the current position information by setting the limiting buffer area room and taking the gravity balance force as the basis, it is ensured that generation of the boundary force is naturally matched with the joint load, and the reliability problem caused by parameter mismatching is reduced; meanwhile, as the boundary force directly derives from internal force adjustment, when the joint retreats from the limiting buffer area, the impedance force can be smoothly converged along with the position change, the residual interference force of traditional control is effectively eliminated, and therefore the reliability of preventing the joint from colliding with the hard limiting area is remarkably improved.

The invention is suitable for the technical field of automatic driving, and provides a dynamic Riemannian manifold artificial potential field obstacle avoidance method based on PPO reinforcement learning, and the method comprises the steps: dividing obstacles into three classes: pedestrians, vehicles and static obstacles through a target detection algorithm, and determining the risk distribution characteristics of each class; secondly, a 11-dimensional high-dimensional space-time state space is constructed, and risk pre-judgment is achieved; a PPO reinforcement learning algorithm is introduced, a high-dimensional state is used as input, four-dimensional potential field deformation parameters for three types of obstacles are output, and a differentiated continuous potential field form is autonomously learned; constructing a covariance matrix based on Riemannian geometry, generating a non-abrupt-change anisotropic repulsion field, and superposing a virtual escape force to crack a local minimum value; and synthesizing the gravitational force, the total repulsive force and the escape force to obtain a total potential field force, and outputting a steering angle and acceleration instruction conforming to vehicle dynamics constraints. According to the strategy, a complete obstacle avoidance framework is constructed, and the technical limitation of a traditional scheme is effectively relieved.

The invention relates to a method and a device for acquiring a gas-water gravitational differentiation behavior in an oil reservoir considering an oil layer dip angle, and relates to the technical field of oil-gas field development. Comprising the following steps: based on a maximum distance criterion of migration of a gas-water mixed displacement area along an inclined displacement direction by a complete gravitational differentiation distance and a vertical water-drive reservoir thickness criterion after complete gas-water differentiation by a complete differentiation thickness or height; according to the water phase flow, the gas phase flow, the flow of the gas-water mixing area, the total flow, the gas flow-total flow of the injected fluid, the water flow-total flow of the injected fluid, the thickness of the oil reservoir, the water vapor and the gas-water differential velocity, a gravitational differential model of the oil reservoir is obtained; and inputting the basic parameters of the target water-gas alternate injection inclined oil reservoir into the oil reservoir gravitational differentiation model for calculation to obtain a gas-water gravitational differentiation behavior result of the target oil reservoir. According to the acquisition method provided by the invention, efficient prediction of the gravitational differentiation behavior of the oil reservoir developed by alternately injecting water and gas is realized.

An intermediate axis theorem demonstration device for teaching the intermediate axis theorem includes an object, an actuator, and a levitation module. The object has a primary, secondary axis, and intermediate axes of rotation, each having moment of inertia with that about the intermediate axis being greater than that about the secondary axis and less than that about the primary axis of rotation. The actuator is releasably engageable to the object to initiate rotation of the object about its intermediate axis. The object is selectively positionable upon the levitation module, which counteracts a gravitational force upon the object to maintain the object in a substantially fixed position while rotating about its intermediate axis of rotation. An observer thus can observe rotation of the object about its intermediate axis of rotation and intermittent 180° rotation of the object about its primary axis of rotation.

Systems for measuring temporally resolved flow processes are known, comprising a rotational displacer (18) arranged in a gas line (10) between an inlet (12) and an outlet (14), a translational pressure difference sensor (26), which is arranged in a bypass line (16) bypassing the rotational displacer (18) and which comprises a displacement body (30) that is translationally movable in a measurement chamber (28), a detection device (32) that records the deflection of the displacement body (30) in the measurement chamber (28) and is connected to a control and evaluation unit (24), and a drive motor (20) via which the rotational displacer (18) is driven in a manner regulated via the control and evaluation unit (24) as a function of the measured values of the detection device (32). In order to be able to use these systems for measuring gases as well, it is proposed that the displacement body (30) comprises a body part (42) which is produced from a diamagnetic material and interacts with a magnetic field which is generated by magnets (40) in the measurement chamber (28) and which has an alternating polarity in a width direction (Y), which is directed perpendicularly to the displacement direction (X) of the displacement body (30) and perpendicularly to the gravitational force (Z), and has a constant polarity in the displacement direction (X).

This utility model discloses a stage lighting device for stage use, relating to the field of lighting technology. It includes a base, a first support rod, a lamp body, a first support seat, and a protective cover located directly above the lamp body. An elastic support component connects the upper end of the first support seat to the base, and a second support rod is fixed between the protective cover and the first support seat. Through the coordinated arrangement of the first support seat, the protective cover, and the elastic support component, under normal use, the compression spring is compressed under the weight of the base, the first support rod, and the lamp body, and the protective cover is located directly above the lamp body, without affecting the lighting effect. When the device accidentally tips over, the gravitational force of the base, the first support rod, and the lamp body is insufficient to keep the compression spring compressed. The spring returns to its original position under its own elastic force, placing the lamp body inside the protective cover, thus preventing the lamp body from colliding with external objects and better protecting it.

This application belongs to the field of geophysical exploration technology, specifically disclosing a three-dimensional gravity and magnetic field joint inversion method based on deep learning pre-optimization and model fine-tuning. Through this application, after determining the pre-optimized joint inversion network parameters, the pre-optimized three-dimensional gravity and magnetic field joint inversion result is determined based on the two-dimensional gravity observation data and the two-dimensional magnetic observation data to be predicted. The pre-optimized joint inversion network parameters are then adjusted, and the optimal three-dimensional gravity and magnetic field joint inversion result is determined based on the adjusted optimal joint inversion network parameters. By combining network pre-optimization and network parameter fine-tuning, the method retains the generalization ability of the pre-optimized joint inversion network parameters while mitigating the impact of deviations between the observation data to be predicted and the pre-trained features of the dataset. Finally, the optimal three-dimensional gravity and magnetic field joint inversion result is determined based on the adjusted optimal joint inversion network parameters, thereby effectively improving the accuracy and efficiency of the three-dimensional gravity and magnetic field joint inversion.

According to the method and device for in-situ survey of the water pressure borne by the underground structure, the value of the water pressure borne by the outer surface of a structure in an underground water-soil mixture on the unit area is measured according to the Newton's third law, namely the principle that acting force is equal to counter-acting force. Providing a measuring device at least comprising a survey hole, a load system and an underground water level control system; the acting force along the gravity direction is reduced in a step-by-step unloading mode, so that the measuring bottom plate tends to a static unbalance state and enters different self-stabilization balance states; along with the gradual increase of unloading, the counterforce of the soil spring in the reverse gravity direction is gradually reduced; recording the motion state of the measuring bottom plate under each stage of load, and obtaining a previous self-stabilization equilibrium state closest to the state by recording the violent floating motion state of the measuring bottom plate; the tiny soil reaction force in the self-stabilization equilibrium state is ignored, and according to a mechanical equilibrium equation, the total lower pressure value on the measurement bottom plate in the state is approximately taken as the underground water pressure value borne by the measurement bottom plate.

According to the method, a surface gravity wave and inner interface wave velocity potential field is analyzed into a product form of a vertical characteristic item and a horizontal diffraction field, and dimensionality reduction solution of a three-dimensional wave problem is realized; a vertical characteristic function orthogonal system meeting free liquid level, seabed boundary and interface coupling conditions is constructed, horizontal diffraction potential is decomposed into an incident field, a local column and an adjacent column scattering effect, and a Bessel function addition theorem is applied to construct a closed linear equation set of a multi-column interference field; establishing an extended dispersion equation containing density spring layer parameters, and revealing a modulation rule of layered strength on complex wave propagation characteristics; and finally, through tensor product coupling of a vertical mode and a horizontal diffraction field, constructing a full-three-dimensional diffraction velocity potential analytical solution, synthesizing a cross-layer pressure field integral by adopting a domain decomposition technology, and establishing a multi-column array generalized wave excitation force forecasting model. According to the method, efficient analytical calculation of the wave load of the multi-column system in the layered fluid is innovatively achieved.

The invention discloses a method for determining the gravity center of an object according to universal gravitation between the objects and calculating a universal gravitation constant according to the gravity center. In general physics, the mass of the object can be considered to be concentrated at one point which is called the gravity center of the object, and the gravity center of the regular object with uniform mass is in the geometric center of the object; when the universal gravitation technology is applied, the description has deviation, the patent points out the deviation, and the invention provides a method for determining the gravity center of the object through the universal gravitation between the objects: determining the gravity center of the object: when the object is attracted by the universal gravitation of other objects, the mass of the other objects can be considered to be concentrated at one point, and the gravity center of the object is determined; the universal gravitation resultant force on the mass of each part forming the object when the mass of the other object is concentrated at one point is equal to the universal gravitation of the other object on the object when the mass of the object is concentrated at the gravity center; on the basis that the gravity center of an object is determined, the invention discloses a method for calculating a universal gravitation constant through experiments such as a Cabendish torsion balance and the like.

The invention relates to a NMR spectrometer (10) comprising a permanent magnet arrangement (11) which comprises a measurement volume (12) and a bore (13) for introducing a NMR measurement sample in a sample cuvette (14) and a HF coil (15) outside a cylindrical temperature regulation tube (16) which comprises a continuous annular gap (17) through which a temperature regulation gas can be conducted through a gas inlet (18), characterized in that on the end opposite to the gas inlet a movable holding device (19) is mounted which in a first operating position does not touch the sample cuvette, in a second operating position holds the sample cuvette force-locked and / or form-locked on the outer circumference of the sample cuvette with an axially acting force or static friction F f in its measurement position and in a third operating position releases the sample cuvette for removal and in the second operating position applies F f >F Stau -F Gewicht , wherein F Stau denotes the buoyancy force generated by the dynamic pressure of the temperature regulation gas flowing onto the sample cuvette and F Gewicht denotes the gravitational force of the sample cuvette. By this it is possible to avoid the problems of the known generic arrangement by the dynamic pressure of the temperature regulation gas.

The invention discloses an energy conversion method and device based on a gravity field gas vertical pressure gradient, and relates to the technical field of gravity field gas thermodynamic cycle and energy conversion. Comprising the steps that a closed circulation channel composed of a gas conveying power unit, a gas conveying expansion unit, an acting output unit and a gas backflow unit is filled with working gas; the working gas at the low position is driven to rise in the vertical direction, adiabatic expansion and acceleration are carried out under the pressure decreasing condition, and gas internal energy and pressure energy are converted into kinetic energy; the high-speed gas is guided into the acting output unit to drive the generator set to generate electricity; and the acting gas naturally settles and is compressed in the backflow channel by virtue of gravity, exchanges heat with the environment in the settling process to recover the initial state, and then enters the power conveying unit again. According to the invention, a closed circulating acting path utilizing the vertical pressure gradient of the gravity field is constructed, and the comprehensive utilization efficiency of low-grade heat energy and gas pressure energy is improved.

The present application proposes a protective gravity compressed air energy storage system for reducing the impact force of gravity pressure blocks, comprising a vertical shaft and an annular locking platform, wherein a gravity component is movably inserted in the vertical shaft, and the gravity component and the vertical shaft are sealed by a sealing membrane so that the gravity component, the sealing membrane and the area below the sealing membrane form an air storage chamber, and the annular locking platform is arranged on the vertical shaft, and the annular locking platform is sleeved on the outside of the gravity component, and a plurality of dampers are arranged on the annular locking platform, and the plurality of dampers form an annular structure so that when the gravity component moves downward to the damper, it is supported by the plurality of dampers. By arranging a plurality of dampers, the impact force generated by the gravity component under an accident condition is weakened through buffering, thereby reducing the downward impact force of the gravity component under the accident condition, weakening the secondary damage after the accident, and ensuring the overall safety of the vertical shaft structure.

The invention provides an agent hidden maneuvering method, system and device and a readable storage medium, and the method comprises the steps: determining a tangent plane of an obstacle in a target region, the tangent plane being perpendicular to a connecting line of a geometric center of the obstacle and a detection point; determining a first projection of the obstacle on the tangent plane by taking the detection point as a projection center, and determining a blind area corresponding to the obstacle based on a boundary of the first projection and a straight line connecting the detection point and the boundary; a reference path is determined in the target area based on a path cost function, the path cost function comprises the cost of the path passing through the blind area, the obstacle and the exposure area, and the exposure area is the area except the blind area and the obstacle in the target area; and by taking the reference path as a gravitational force source and the obstacle as a repulsive force source, constructing a simulation force field in the target area to generate a hidden maneuvering path of the intelligent agent. Compared with the prior art, the problems of insufficient concealment consideration, weak environmental adaptability and the like in the prior art are solved.

The application provides a construction method and device of a feedforward torque model of a coupling span driven joint, and the method comprises the following steps: constructing an initial dynamics equation of each joint according to a steel wire rope torque between coupling span driven joints of a target object, an effective torque of each joint of the target object, and a motor torque corresponding to each joint; establishing a friction force model of each joint according to an actual speed of each joint and an actual friction force of each joint, and constructing a gravity model of each joint according to a low-speed reciprocating motion state quantity of each joint; constructing a target feedforward torque model of each joint according to the initial dynamics equation of each joint, the friction force model of each joint, the gravity model of each joint, and an optimal trajectory, wherein the target feedforward torque model comprises an observation matrix and a minimum parameter inertia set; and controlling the motion of each joint in the target object based on the target feedforward torque model of each joint. The accuracy of tendon coupling span driven joint parameter identification is improved.

This application relates to a satellite orbit prediction method. The method includes: constructing an expression for the gravitational force acting on the satellite based on its mass and distance from Earth; constructing a differential equation for the satellite's acceleration based on Newton's second law and the expression for the gravitational force; solving the differential equation based on the conservative force field characteristics of mechanics, calculating the gravitational potential energy function and its derivative with respect to time; transforming the derivative expression based on the mechanical conservation law that the sum of the derivatives of kinetic energy and gravitational potential energy with respect to time is zero, to obtain the derivative expression for acceleration; converting the time relationship in the derivative expression of acceleration to a radial position relationship based on the principle of conservation of angular momentum; integrating the radial position relationship to obtain the satellite's orbit equation. This method enables satellite orbit prediction.

The present invention provides methods and systems are presented suitable for evaluating a dynamic wellbore azimuth and inclination measurement based on measurements acquired by a downhole tool capable of acquiring accelerometer (gravity) and magnetic field measurements representative of the earth's gravitational and magnetic fields. These methods and systems can also be used for evaluating static inclination and azimuth measurements. These methods and systems comprising the present invention provide an improvement over the prior art for their function and address many shortcomings of prior art.

A heat source device (1) includes: a cylinder (71) which stores a flammable refrigerant and has, in a lower portion thereof, a discharge port (71a) for discharging the flammable refrigerant; a casing (21) having a bottom plate (23) on which a compressor (12) and the cylinder are set; and a restriction part (80) for restricting a direction in which the compressor is displaced when the heat source device falls. A first straight line (L1) is defined, in a top view of the heat source device in an installed state, as a straight line passing through the center of gravity (C1) of the compressor and the center of gravity (C2) of the cylinder. The restriction part, under conditions in which the first straight line coincides with the gravitational direction, restricts the displacement of the compressor toward the cylinder so that the displacement occurs in a direction away from the first straight line.

The present application is suitable for geotechnical engineering technical field, the present application provides a kind of slope body elastic stress calculation method under supporting action, comprising the following steps: the slope angle is β for the slope under the action of initial ground stress, slope top overload and supporting force is established mathematical model;The mathematical model is decomposed into: semi-infinite plane model α and gravity-free slope model β;The gravity-free slope model β is decomposed into: infinite plane inside semi-infinite hole model β1 under the action of virtual surface force V b Of hole edge, and, surface virtual surface force V v Under the action of semi-infinite plane model β2 without hole;The stress of semi-infinite plane model α, the stress of semi-infinite plane model β2, the stress of semi-infinite hole model β1 are calculated, and the stress analytical solution of model β is iteratively calculated.The present application can consider the influence of initial ground stress, overload, supporting pressure and anchoring force and other load actions simultaneously, to be suitable for the stress calculation of various angle slopes.

The present invention provides a method and device for compensating for horizontal acceleration errors in a mobile atomic interferometer gravimeter. Within a single measurement cycle, the method obtains the gravitational phase shift based on the interference loop formed by the interaction between a Raman light pulse sequence and a cold atomic cluster. The method also obtains information on the relative position change of the cold atomic cluster within the horizontal cross-section of the Raman light pulse sequence. Based on this relative position information and pre-acquired characterization information, the method obtains the effective Rabi frequency under the action of horizontal acceleration. The effective Rabi frequency is then compensated to reduce the impact of horizontal acceleration on the atomic interferometer gravity measurement process. Based on the relative position change information and the characterization information, the method obtains the wavefront phase shift introduced by the horizontal acceleration. Based on the wavefront phase shift and the gravitational phase shift, the method obtains a corrected gravitational phase shift. The method then obtains the single-cycle gravitational acceleration based on the corrected gravitational phase shift. This method improves the measurement accuracy of the atomic interferometer gravimeter.

The application discloses a multi-directional control refill receiving pen, which comprises an inner rod assembly, an outer rod, a refill and a return spring; the inner rod assembly is slidably sleeved on the inner side of the outer rod, and the return spring is sleeved between the front part of the refill and the inner side of the inner rod assembly to provide a refill receiving reset force; the inner rod assembly comprises an inner rod main body and a top rod from bottom to top; the opposite ends of the inner rod main body and the top rod are extended and staggered to be inserted and slidably connected, and an impact track is arranged in the middle of the extended section of the top rod; a trigger controlled element, a trigger main control element and a refill receiving control mechanism are arranged on the inner side of the top rod; the refill receiving control mechanism is a switch for switching the refill receiving state in cooperation with the elastic force of the return spring; the trigger controlled element can be axially moved under the extrusion pressure of the trigger main control element; the trigger main control element can guide the direction of the gravity action according to the use state of the pen to move the trigger controlled element; and thus, the refill can be received in multiple control modes.

The invention discloses a truss manipulator zero-force dragging teaching method, which comprises the following steps of S1, building a truss manipulator kinetic model: obtaining parameters including gravity torque, static friction force and viscous friction coefficient by building a single-axis kinematics model of a truss manipulator; s2, designing an action process, and identifying each parameter of the kinetic model; and S3, compensating torque output required during mechanical movement according to the obtained identification parameters, and realizing zero-force dragging. The invention provides a zero-force dragging teaching method for a truss manipulator, which can enable an operator to enable the manipulator to move along an expected running track in a dragging manner, and after the dragging is finished, a system records the motion track during the dragging motion of the manipulator and reproduces the motion track during automatic running. Therefore, an operator only needs to understand the action technological process of the manipulator and does not need to have programming skills, application of the manipulator can be achieved, and the operation process is simplified.

The invention discloses a water hammer oscillation blockage removal method based on disturbance equation modeling, and relates to the technical field of oil and gas field exploitation and shaft physical blockage removal. Constructing boundary conditions of the negative pulse return-to-zero type switching valve; constructing a disturbance continuity equation and a disturbance momentum equation; the gravity influence is eliminated, and a water hammer wave disturbance equation set is built in combination with the pipeline friction coefficient; according to the interval and the time step length when the target shaft is dispersed, on the basis of the boundary condition of the negative pulse return-to-zero type switching valve, finite difference discrete processing is conducted on the water hammer wave disturbance equation set, and water hammer wave transient control equation sets corresponding to all depth nodes are obtained and solved in parallel; and pressure distribution and speed distribution of the water hammer waves in the propagation process in the target shaft are obtained, and then parameters of water hammer oscillation unblocking operation of the target shaft are designed or adjusted. According to the method, the water hammer wave disturbance equations suitable for different well types are constructed, the gravity effect requirement is eliminated, well depth and channel friction factors are uniformly incorporated into a modeling framework, and high-precision description of the transient propagation process of the water hammer waves is achieved.

The invention relates to the technical field of oil and gas field development, and provides a non-Newtonian fluid displacement front calculation method considering a gravity effect and electronic equipment. Establishing a shunt equation considering the non-Newtonian fluid shear rate related viscosity and the gravity number; calculating the shunt equation by using a characteristic line method to obtain a Beckley-Levilt expansion equation, and obtaining an implicit solution of the leading edge position through integral transformation; calculating a nonlinear equation of the front edge position by using a Lanbert W function, performing approximate estimation on the value of the Lanbert W function in combination with a Wenniz analytic solution function, and explicitly calculating the front edge position; and according to the calculation result of the analytical solution, determining the front edge position of non-Newtonian fluid displacement under different apparent viscosities and different reservoir dip angles. The analytical solution has guiding significance for solving the gravity effect problem in the two-phase flow, and the change condition of the front edge position can be predicted through the model, so that a more effective development scheme is formulated, and the sweep efficiency and the crude oil recovery rate are improved.

Provided are an emblem lifting mechanism and a vehicle. The emblem lifting mechanism includes an emblem body (10), a driving assembly (20) and a clutch (30). The driving assembly is disposed in a vehicle body of the vehicle (500). The clutch selectively connects the driving assembly and the emblem body. When the clutch connects the driving assembly and the emblem body, the driving assembly is able to, through the clutch, drive the emblem body to move relative to the vehicle body of the vehicle and support the emblem body, and when the clutch disconnects the driving assembly and the emblem body, the emblem body is able to descend under gravitational force of itself. Thus, the emblem body can be effectively protected, and the emblem body is prevented from being damaged or stolen.