311 results about "Free flow" patented technology

The invention discloses a road section delay loss estimation method based on ponding depth and traffic flow probability density. The method comprises the following steps: S1, establishing a relation model of the ponding depth and the distance of a road section; s2, drawing up a probability density function of the maximum ponding depth based on the maximum ponding depth of the road section acquired by forecasting the historical record of the same rainfall; s3, drawing up a probability density function of the road section traffic flow based on the road section traffic flow collected by forecasting the same rainfall historical record; s4, calculating the free flow speed, calculating the average vehicle speed according to the road section traffic flow, and calculating the average passing time of the vehicle under the road section water accumulation condition; and S5, calculating the average delay time of the vehicle in the ponding road section, and estimating the total traffic delay loss amount of the road section according to the average delay time and the passenger number probability distribution. According to the method, the scientific delay loss estimation model is established by comprehensively based on the uncertainty of the ponding depth, the traffic flow and the number of passengers, and an important basis is provided for prevention and treatment of traffic congestion caused by urban waterlogging ponding.

The invention provides a fluid conveying mechanism and a nutrition pump, the fluid conveying mechanism comprises a conveying assembly and a connecting seat, the conveying assembly comprises a flow passage and a valve mechanism arranged on the flow passage, and the conveying assembly is mounted on the connecting seat. The fluid conveying mechanism is reliable in connection, the risk that the fluid conveying mechanism falls off from the nutrition pump can be avoided, and the free flow phenomenon can be prevented.

The invention discloses a self-adaptive multi-language inter-translation system, and relates to the technical field of multi-language inter-translation, and the self-adaptive multi-language inter-translation system comprises a voice acquisition module, a language analysis module, a semantic recognition module, a bidirectional translation module and a self-adaptive learning module. The translation process is continuously optimized by analyzing the user feedback and the translation result, so that the translation quality can be continuously improved along with time and data accumulation, meanwhile, the forward and reverse translation function provided by the bidirectional translation module ensures that the user can be well supported whether inputting or receiving information, and the user experience is improved. A user can switch languages at any time according to needs, so that communication is smoother, and free flow of information and communication of multi-culture are promoted.

The present invention relates to an injector (1) for injecting a gaseous medium, in particular a gaseous fuel, preferably hydrogen, into a combustion chamber (20) of an internal combustion engine. The injector (1) comprises, among other things, an axially movable valve closing element (5) for opening and closing at least one opening on a sealing seat (7), an actuator (21) for actuating the valve closing element (5), and a flow-influencing geometry (10) located downstream of the sealing seat (7). According to the invention, the flow-influencing geometry (10) is designed such that at maximum needle stroke (I h ) of the valve closing element (5) the following relation applies: 5 x I h ≥ s ≥ 1.5 × I h, where (s) is the distance between the radially outer contour of the valve closing element (5) at its downstream edge region and the axially projected ring line below it on a flow-direction tapered section (12) of the flow control geometry (10) to generate a nearly lossless flow downstream of the valve closing element (5).

The invention discloses a hypersonic flight vehicle boundary layer transition prediction method considering wall surface ablation. The method comprises the following steps: determining a free incoming flow condition of a flight vehicle, a geometric shape of the flight vehicle and a wall surface ablation model; according to the given flight working condition, considering the wall surface ablation boundary condition, and calculating a basic flow field of the corresponding working condition by solving a Navier-Stokes equation; secondly, establishing a linear stability analysis equation by adopting LST, and performing flow stability analysis on the basic flow field by considering a linearization wall surface ablation condition to obtain disturbance growth rate distribution of small disturbances with different frequencies; according to the obtained disturbance growth rate distribution, an e-N method is adopted, envelope lines of amplification factor N values of disturbance of different frequencies in the flow direction are calculated, experience transition N values are compared, and the transition position is predicted. According to the method, basic flow field calculation and stability analysis of the wall surface ablation effect are considered, the flow state of the hypersonic aircraft in the flight process is met, and the boundary layer transition prediction position can be predicted more accurately.

A mechanical pump-free flow boiling heat sink, including an evaporator, a two-phase flow steam injector, a first condenser, a boiling pool and a second condenser. A vapor outlet of the evaporator is communicated with a vapor-phase inlet of the two-phase flow steam injector. A liquid-phase outlet of the evaporator is communicated with an inlet of the boiling pool. An outlet of the boiling pool is communicated with an inlet of the second condenser. An outlet of the second condenser is communicated with a liquid-phase inlet of the two-phase flow steam injector. An outlet of the two-phase flow steam injector is communicated with an inlet of the first condenser. An outlet of the first condenser is communicated with an inlet of the evaporator.

The invention discloses an incoming flow Mach number control method for a transient transonic wind tunnel airfoil test, and belongs to the technical field of wind tunnel airfoil tests. The problem that in the prior art, a traditional Mach number control method adopting a conventional plenum chamber reference point is difficult to be suitable for carrying out an airfoil test in a transient transonic wind tunnel is solved. According to the method, a standard airfoil model is selected, simulation calculation is carried out, and distribution of Mach numbers in the incoming flow direction of the airfoil model in the free flow state, namely the wind tunnel wall-free state, is obtained; s2, performing simulation calculation in a three-dimensional full-simulation state on the wind tunnel by adopting a standard airfoil model which is the same as the step S2, acquiring axial Mach number distribution of side wall center lines of test sections with different opening-closing ratios of the wind tunnel according to the opening-closing ratios, and calculating the axial Mach number distribution of the side wall center lines of the test sections with different opening-closing ratios; and analyzing to obtain a Mach number which is controlled in the incoming flow direction and is 3 times the chord length of the airfoil profile from the front edge of the airfoil profile, and carrying out a standard airfoil profile model wind tunnel test. According to the invention, the accuracy of simulating the incoming flow Mach number and the opening-closing ratio of the test section is improved, and the method can be applied to the temporary impulse transonic wind tunnel airfoil test.

A self-closing vent has its frame and honeycomb screen coated with an intumescent material. When affixed to an external wall or eave of a building, the vent is normally open, allowing free flow of air into and out of the building, but when exposed to the heat of a fire, such as a wildfire, the intumescent material expands to close the vent, thereby preventing an external fire from entering the building. Enhancements include a weather-protective topcoat over the intumescent material, a fine mesh screen over the interior side of the honeycomb screen, and a protective set of louvers at the outside of the vent.

The present invention relates to an injector (1) for injecting a gaseous medium, in particular a gaseous fuel, preferably hydrogen, into a combustion chamber (20) of an internal combustion engine. The injector (1) comprises, inter alia, an axially movable valve-closing element (5) for opening and closing at least one opening at a sealing seat (7), an actuator (21) for actuating the valve-closing element (5), and a flow-influencing geometry (10) arranged downstream of the sealing seat (7) in terms of flow. According to the invention, the flow-influencing geometry (10) is designed in such a manner that, at a maximum needle stroke (lh) of the valve-closing element (5), the following relationship applies: 5 x lh ≥ s ≥ 1.5 x lh, wherein (s) is the distance between the radially outer contour of the valve-closing element (5) at the downstream edge region thereof and the annular line lying axially in a projection therebelow on a portion (12), tapering in the flow direction, of the flow-influencing geometry (10), in order to generate a virtually loss-free flow downstream of the valve-closing element (5).

A guide vane ring and / or a rotor blade ring for a low-pressure turbine of an aircraft gas turbine of a turbofan engine includes a plurality of airfoils disposed consecutively in a direction of rotation. The plurality of airfoils includes a first airfoil and a second airfoil adjacent to the first airfoil in the direction of rotation. The first and second airfoils are disposed relative to each other such that a ratio e / t, viewed in a conical section, results froma smallest free flow cross-section e taken on the pressure side of the first airfoil from its trailing edge to a suction side of the second airfoil, anda pitch t of the airfoils,such that e / t is less than 0.31, (e / t<0.31).

A squat silo double-pipe folding material distribution device comprises a silo, a transfer granary, a center grain inlet pipe, a supporting sleeve and a winch or a pneumatic hoist. A plurality of in-bin feeding pipes are connected to the side wall of the center grain inlet pipe in the vertical direction at intervals in a circumferential arrangement mode and communicated with the interior of the center grain inlet pipe, each in-bin feeding pipe is externally connected with a folding material distribution groove, and turnover valves synchronously rotating with the folding material distribution grooves are arranged in the in-bin feeding pipes. The winch or the pneumatic hoist drives the traction rope to further control the rotation angle of the turnover valve in the folding material distribution groove and the feeding pipe in the bin, and it is kept that in the whole grain feeding process, flowing of grains is limited, and free flowing is not generated. And meanwhile, grain feeding starts from the bottom of the silo and is gradually distributed upwards, the folding of the material distribution groove is beneficial to conveying the grain to the edge of the silo in a longer distance, the occurrence of the grain grading phenomenon is reduced, and automatic grading and crushing are avoided when the grain is fed into the grain silo disclosed by the utility model.

The invention discloses an automatic driving decision-making method and system based on multi-modal heterogeneity feature fusion, and belongs to the technical field of automatic driving, and the method comprises the steps: S1, dividing a driving state: S101, employing a segmentation algorithm to carry out the feature division of the speed and track profile of a vehicle driving track; s102, based on a Newell stimulation-response theory and a dynamic time warping algorithm, establishing a dynamic response relationship between vehicles, and identifying a following flow state and a free flow state; s103, identifying a specific driving state; s2, constructing a car-following model by using the driving state: S201, constructing a driving state prediction module framework; s202, establishing an improved LSTM network for realizing multi-modal feature fusion; and S3, training a car-following model, and realizing cooperative training of driving state prediction and car-following behavior modeling through course learning and a multi-stage optimization strategy.

The invention discloses a microfluidic pre-focusing chip, and belongs to the technical field of microfluidics, the chip comprises a piezoelectric substrate, an interdigital transducer and a micro-cavity, the micro-cavity is bonded on the piezoelectric substrate, the micro-cavity comprises a main cavity channel, two ends of the main cavity channel are respectively provided with at least one sample input port and at least one sample output port, and the main cavity channel is connected with the interdigital transducer. The interdigital transducers are arranged on the piezoelectric substrate, located on the two sides of the main cavity channel respectively and arranged in the direction perpendicular to the flowing direction of a sample in the main cavity channel, the microcavity further comprises side cavity channels distributed on the two sides of the main cavity channel, filling liquid injection ports are formed in the side cavity channels, filling liquid is a liquid photocurable material, and the filling liquid injection ports are communicated with the main cavity channel. Meanwhile, the invention further discloses a design, manufacturing and application method of the chip, and the two-stage functions of pre-focusing and concentration can be effectively achieved under the sheath flow-free condition.

The present invention relates to a design method for a variable Mach number "series" wide speed range waverider aircraft based on an inverse design wall point, comprising: S1. Given the design Mach number variation law and solving the free flow design Mach number; S2. Solving the variable Mach number "series" supersonic axisymmetric reference flow field based on the inverse design wall point using a swirl characteristic line method; S3. Streamline tracking is performed in the variable Mach number "series" supersonic axisymmetric reference flow field to generate the aerodynamic shape of the variable Mach number "series" wide speed range waverider aircraft. The present invention can effectively improve the degree of freedom of the configuration design of the variable Mach number wide speed range waverider aircraft and enrich its design scheme.

The application discloses a wind turbine wind parameter data correction method, device, equipment and medium, comprising: simulating multiple working conditions according to basic parameter information of a wind turbine, determining first simulation wind parameter data of a free flow position and second simulation wind parameter data of a target position point under each working condition based on simulation results, and determining a first correction parameter based on the first simulation wind parameter data and the second simulation wind parameter data. First actual wind parameter data of the free flow position and second actual wind parameter data of the target position point under each working condition are obtained, and a second correction parameter is determined. The first correction parameter is corrected based on the second correction parameter to determine a corrected first correction parameter. The wind parameter data under the target working condition is corrected according to the corrected first correction parameter. That is, the correction parameter obtained according to the actual running working condition is used to correct the simulation obtained correction parameter, so that the wind parameter data obtained according to the correction parameter is more accurate subsequently.

The invention relates to the technical field of intelligent traffic management systems, in particular to an appointment payment method based on expressway free flow toll collection. An existing free flow charging technology mainly adopts a postmortem fee deduction mode, the problem of fee deduction failure caused by insufficient account balance, payment channel faults and the like exists, then arrearage, overdue money and follow-up cost recovery are generated, and user experience and charging management efficiency are seriously affected. According to the invention, through establishing a whole-process management mode of beforehand reservation-in-event verification-after-event settlement, a user can set a travel plan and select a reservation payment mode through a terminal before travel, and the system generates an estimated cost based on a built-in charging standard; in the vehicle passing process, the road side sensing data and the vehicle positioning data are fused, and the consistency of the actual driving path and the reserved path is accurately verified; and finally, executing corresponding fee deduction operation according to a verification result.

A divider panel having a top end with an angled v-cut portion, a bottom end with an open slot and an angle v-cut portion, and a plurality of side walls, said divider panel additionally having a plurality of raised projections spaced out such that a horizontal channel and a vertical channel is formed between the projections. Two or more divider panels may be provided which removably mate together and thus create an interlocking panel shape. The dividers are placed within an existing shipping container or crate, and thus the shipping container has different chambers therein for the insertion of internal material such as fruit, vegetables, or nuts to be segmented into each of the different compartment segments. The channel or channels allows the free flow of air or liquid therein to allow for quick washing and uniform freezing of the internal material while in the shipping container.

A fluid compressor system has a scavenge loss limiter that increases the efficiency of the fluid compressor system by reducing the compressed working fluid recirculated into the airend through a scavenge flow. The scavenge loss limiter includes a scavenge hole positioned at a discharge end face of a rotor cavity of the compressor housing. As a rotor of the compressor system rotates, the rotor may intermittently restrict the free-flowing scavenge flow returning from a lubricant separation tank. The rotor may be a male rotor having a plurality of male lobes. As the discharge end clearance between the rotor and the discharge end face is tightly controlled and monitored, a better control of the scavenge flow returning to the rotor cavity is achieved.

The invention relates to a roller device for enhancing material mixing or separation and a working method. The roller device comprises a roller body, a baffle, a rolling shaft and a driving device. The rolling shaft is used for fixing the roller body; the baffle is arranged in the center inside the roller body. An output shaft of the driving device is connected with the rolling shaft and used for driving the roller body to rotate. The second driving device is arranged on the back face of the roller body, an output shaft of the second driving device is connected with the baffle and used for driving the baffle to rotate, and the rotating direction of the baffle is opposite to that of the roller body. Compared with the prior art, the non-free flow area can be destroyed through fluctuation formed by reverse interactive rolling, so that the material mixing efficiency is improved. When the baffle rotates counterclockwise, a complex flow pattern is induced within the drum. The flowing modes can form strong shearing force in the roller to break the aggregation phenomenon of the particles, so that uniform mixing or separation is realized.

The present application relates to the technical fields of anti-choking drinking water control, and provides an anti-choking drinking water control method and device, which comprises a cup body, a cup cover connected to the top side of the inner wall of the cup body through a sealing ring, an adjusting cavity fixedly connected to the bottom end of the cup cover, an extension pipe connected to the bottom end of the adjusting cavity through a splicing assembly, a gravity ball fixedly connected to the bottom end of the extension pipe, a through hole for ensuring water flow on the outer wall of the gravity ball, a suction nozzle fixedly connected to the top end of the cup cover, a rubber pad slidingly connected to the inner wall of the adjusting cavity, and a connecting pipe fixedly connected to the top end of the rubber pad. Through the threaded transmission cooperation of the spiral sleeve and the spiral rod, the rubber pad is vertically slid in the adjusting cavity, and then the blocking ball is opened under the negative pressure generated by the appropriate suction force, the waterway is opened under the negative pressure generated by the appropriate suction force, and the blocking ball quickly falls to block the bottom end of the adjusting cavity when there is no negative pressure, so as to avoid the free flow of residual water and realize the flexible adjustment of the suction force.

A writing tip assembly for dispensing a free-flowing low-viscosity ink from a writing instrument may include a micro-spring, a writing ball configured to transfer ink to a substrate, and a second ball between the writing ball and the micro-spring. The second ball is configured to transfer ink to the writing ball. A writing instrument for dispensing a free-flowing low-viscosity ink includes an ink reservoir, the writing tip assembly, and a feeder fluidically coupling the ink reservoir to the writing tip assembly.

The invention relates to an electrically operated axle drive train (1) for a motor vehicle (2) comprising an electric machine (4) for driving the motor vehicle (2), which can be powered by an inverter (3) and is housed in a motor housing (11), comprising a stator (26) and a rotatable rotor (27), wherein the inverter (3) housed in an inverter housing (12) is electrically connected to an electrical energy source (5) arranged in the motor vehicle (2) for powering the electric machine (4), and a transmission assembly (9) housed in a transmission housing (13) formed at least partially from metal, which is arranged in the torque path between the electric machine (4) and at least one wheel (10) of the motor vehicle (2), wherein at least on the metal-formed areas of the transmission housing (13),in which the axle drive train (1) is exposed to the freely flowing and / or splashing cooling fluid (14) in the gearbox housing (13), at least in sections a fluid guide structure (50) made of a material different from the metal of the gearbox housing (13) is arranged, wherein the material of the fluid guide structure (50) that differs from the metal of the gearbox housing (13) has a lower thermal conductivity than the metal of the gearbox housing (13).

A cassette with free flow prevention for use with an ambulatory pump. The cassette includes a free flow prevention clamp and a housing. The free flow prevention clamp includes a clamping section having a first clamp side and a second clamp side. The housing supports the free flow prevention clamp and defines a channel for receiving a tube. The first and second clamp sides extend parallel to the channel and the clamping section extends across the channel. The free flow prevention clamp is configurable within the housing via an actuator assembly in an open condition that allows fluid flow through the tube when force is applied to the clamping section and in a closed condition that prevents fluid flow through the tube when the force is removed from the clamping section.

This utility model relates to the field of fertilizer and water transportation technology, and discloses a distribution device for bio-organic fertilizer processing, including a cylinder and a guide channel. The guide channel is provided at the top of the outer wall of the cylinder, and a partition is provided inside the cylinder. A through hole is opened on the front surface of the partition. A grooved plate is fixedly connected to the top of the partition, and a pair of insert rods are fixedly connected to the bottom of the grooved plate. This distribution device for bio-organic fertilizer processing, through the cooperation of the cylinder, guide channel, partition, through hole, grooved plate, insert rods, and insert hole, allows the cylinder to be installed in a fertilizer and water transport vehicle. When the cylinder is filled with an appropriate amount of fertilizer and water and is being transported, the partition divides the interior of the cylinder into two areas. The through hole allows the flow of fertilizer and water on both sides of the partition, restricting the free flow of fertilizer and water. This helps reduce large swings caused by the large inertia of the fertilizer and water, thereby improving the stability during fertilizer and water transportation and significantly reducing the probability of production accidents caused by fertilizer and water splashing.

Techniques described herein involve an electronics-free downhole flow sensor. For example, a system can include a receiver positioned at a surface of a wellbore. A flow sensor can be positioned downhole in the wellbore. The flow sensor can include a wire positioned within a flow path of downhole fluid in the wellbore. The wire can oscillate based on flow of the downhole fluid. The flow sensor can also include a variable reluctance sensor that can detect an electrical signal that is generated by oscillation of the wire. The variable reluctance sensor can transmit the electrical signal to the receiver. The receiver may determine a resonant frequency based on the electrical signal and may determine a fluid velocity of the downhole fluid based on the resonant frequency.

The invention discloses an automatic driving vehicle turning speed regulation and control method taking view limitation into consideration. The method comprises the steps that 1, the length of a straight road section, influencing a vehicle, of the upstream of an inflection point is calculated; 2, acquiring the distance between the vehicle and the bending point; 3, calculating the free flow speed of the vehicle; 4, calculating the acceleration which only considers the view limitation of the curve; 5, calculating the acceleration which only considers the front vehicle; 6, the vehicle speed is regulated and controlled according to the front traffic condition; and 7, circulating the steps until the control time is over. According to the invention, the speed of a turning vehicle can be adjusted in real time according to the radius of the curve and the traffic condition of the road ahead before entering the curve, so that the vehicle can keep a reasonable turning speed when the view of the vehicle is limited, the vehicle can be braked in time when danger is found ahead, and the running safety of the vehicle on the curve is improved.

The utility model discloses a compressed air heating and drying system. Comprising an air compressor, an air storage tank air inlet pipe, an air storage tank, an air storage tank air outlet pipe, an air inlet control valve, a heating cabinet air inlet pipe, a heating cabinet, an interlayer, a sliding groove, a sliding block, a pipe installing frame, a handle, a connecting plug, a wire box, an electric heating pipe, an intelligent temperature controller, a heating cabinet air outlet pipe, an air outlet control valve, a hot compressed air pipe, an elastic hose, a first branch pipe, an air inlet electric small valve and a second branch pipe. According to the drying system, the air compressor, the air storage tank and the heating cabinet are newly added, the intelligent temperature controller on the heating cabinet can accurately control the temperature, it is ensured that the temperature is kept within the optimal drying range, the filter press is transformed, an internal pipeline of the filter press is changed into free flow from underflow, and therefore the drying efficiency is improved. According to the utility model, hot compressed air heated by the heating cabinet can uniformly pass through each filter plate, so that the hot compressed air is in full contact with materials, the purpose of efficient drying is achieved, and meanwhile, the problem of hardening of fine powder is effectively solved.

The invention relates to a carburettor and to a two-stroke engine with a carburettor, the carburettor having a carburettor body in which an air intake channel section is configured. A throttle flap for controlling the free flow cross-section of the air intake channel section is pivotably supported in the carburettor body on a throttle shaft. The air intake channel section has a first longitudinal centre axis in the region of the throttle shaft. The throttle flap has a first end position and a second end position, in which the throttle flap releases a greater flow cross-section of the air intake channel section than in the first end position. Arranged upstream of the throttle shaft is a partition wall section, against which the throttle flap lies in the second end position. Upstream of the partition wall section is provided a choke flap, which can be pivoted between a first end position and a second end position. The throttle flap and the choke flap overlap in the direction of the first longitudinal centre axis in their second end positions. The carburettor is provided for a two-stroke engine.

The invention relates to a set of separator inserts (II, II-a, II-b,...) for a separator having a frame (I) on which one of the separator inserts (II, II-a, II-b,...) of the set of separator inserts (II, II-a, II-b,...) is exchangeably arranged at a time, wherein each of the separator inserts is designed to separate a free-flowing suspension (S) in a centrifugal field into at least two phases (LP, HP) of different densities and forms a pre-assembled exchangeable unit for insertion into the frame (I) of the separator and has at least the following: a rotor (2) which can be rotated about an axis of rotation (D) during operation and has a drum (3) that can be rotated during operation and that has one or more openings; a separating means (6) arranged in the drum (3); an inflow and outflow system having at least one inlet (311, 312) for a free-flowing suspension to be processed and having two or more outlets (313, 314) for discharging the centrifugally separated phases from the drum (3), wherein at least two separator inserts (II, II-a, II-b,...) of the set have different inflow and outflow systems (31), and / or at least two separator inserts (II, II-a, II-b,...) of the set have drums (3) having drum casings with different geometries.