39results about How to "Improve realizability" patented technology

The embodiment of the invention provides an intelligent reflecting surface coverage enhancement method and device for electric power inspection, and the method comprises the steps: building an intelligent reflecting surface and inspection equipment unified scheduling model, and building a unified scheduling model for a multi-intelligent reflecting surface networking network; deducing a signal interference distribution analytic expression, solving a space measure function of a point process and determining heterogeneous station density based on an interference level; constructing a multi-intelligent reflector networking correlation model, and analyzing a link coupling factor; based on modeling of a link coupling factor, the link performance under the collaborative networking is studied; a cross-domain reconfigurable capability boundary is explored, and a spatial statistical average analysis method for coverage, capacity and mobility performance is innovated; an adjustable intelligent reflecting surface distribution dependence model is provided, and a semi-closed theoretical analysis expression of the user coverage rate is given based on a stochastic geometric tool.

The invention relates to the technical field of fuel cells, in particular to a carbon fiber base material for a fuel cell, a preparation method of the carbon fiber base material, raw carbon paper and a preparation method of the raw carbon paper. The preparation method of the carbon fiber base material comprises the following steps: S1, adopting MFC or a mixture of MFC and pre-oxidized fiber pulp as reinforcing fibers, mixing the reinforcing fibers with water, and pulping to obtain premixed slurry; s2, uniformly mixing carbon fibers, the premixed slurry and a dispersing agent to obtain mixed slurry, molding the mixed slurry by adopting a wet molding process, and drying to obtain the carbon fiber base material. The MFC or the mixture of the MFC and the pre-oxidized fiber pulp is used as the reinforcing fiber, and the reinforcing fiber is pulped and then mixed with the carbon fiber and the dispersing agent to prepare the carbon fiber base material, so that the dispersity of the carbon fiber and the mechanical strength and conductivity of the carbon fiber base material in the wet forming process can be improved; and the negative influence on the subsequent preparation of the raw carbon paper is avoided.

The invention provides a vehicle emergency anti-collision control method and system, and relates to the technical field of vehicle anti-collision control. The method includes: acquiring whether a collision risk exists between a vehicle and an obstacle in front of a lane; if the vehicle still has the risk of collision with the barrier in front of the lane after being braked, information of the barrier on the adjacent lane of the lane is acquired, and an AES function is started to perform steering control on the vehicle; and judging whether there is a risk of collision with an adjacent lane obstacle during steering control of the vehicle, if so, respectively evaluating the collision severity of collision between the vehicle and an obstacle in front of the lane and the collision severity of collision between the vehicle and the adjacent lane obstacle, and selecting the direction with the minimum collision severity for collision. Steering is conducted in time when the steering condition is met, and when the steering condition is not met, the damage degree generated when the vehicle collides with the front vehicle or the adjacent vehicle is evaluated, and whether the vehicle collides with the front vehicle or the adjacent vehicle is determined according to the damage degree.

The invention belongs to the technical field of DC-AC converters, and relates to a single-stage current feed type bidirectional DC-AC converter and a fixed frequency control method thereof.The single-stage current feed type bidirectional DC-AC converter comprises a DC side composed of two Boost half bridges with inductors, an AC side composed of half bridges and an AC side filter, a transformer and a control device; the control device is used for controlling the direct current side and the alternating current side to describe the power transmission characteristics of the circuit by transconductance Gm, and the current control of the alternating current side is realized by a feedforward method; fixed-frequency linear phase shift control can be carried out in an ultra-wide DC side voltage range, bidirectional real-time power flow control can be realized in a relatively wide DC side voltage range, and a complex control loop design theory is not needed; therefore, the cost and the power consumption of the controller are effectively reduced, and a higher power density upper limit and a higher efficiency upper limit are achieved.

The invention discloses a permanent magnet auxiliary synchronous reluctance motor control method and system considering eddy current reaction, and the method comprises the steps: building a motor magnetic impedance model considering the eddy current reaction effect, the magnetic saturation effect and the dq-axis cross coupling effect based on a vector magnetic circuit theory; calculating the magnetomotive force of the armature winding and the permanent magnet magnetomotive force of the interpolated ferrite; obtaining a stator flux linkage equation based on magnetomotive force and the motor magnetic impedance model; based on the stator flux linkage equation and the voltage equation, constructing a multi-factor coupled permanent magnet auxiliary synchronous reluctance motor control model; measuring a magnetic induction coefficient value in the motor magnetic impedance model based on a vector magnetic circuit theory magnetoelectric power law; and designing the maximum torque current ratio control method of the permanent magnet auxiliary synchronous reluctance motor based on the multi-factor coupled motor control model. According to the method, the reaction of the eddy current in the permanent magnet auxiliary synchronous reluctance motor on the stator flux linkage is quantitatively considered, the method has definite physical significance and higher modeling precision, and performance improvement of a control system is facilitated.

The invention relates to the technical field of time-triggered network communication, in particular to a time-triggered Ethernet scheduling generation and synchronization system based on a hardware time axis construction engine. According to the system, a time axis structure consistent with global synchronization time is constructed on a switch side through hardware, sending time and a sending sequence of a time trigger frame configured by a user are directly mapped into a resource occupation relation on a time axis, and scheduling window mapping, conflict detection and window shaping are completed on a hardware level; therefore, a deterministic scheduling table is generated; through a double-table storage and time alignment switching mechanism, undisturbed updating and synchronous effectiveness of the dispatch table between the switch and the end system are realized. Compared with a traditional scheme of generating a scheduling table depending on a software algorithm, the method does not need a complex scheduling solution process, supports manual controllable configuration of time-triggered frame scheduling, and improves the certainty, autonomy and engineering realizability of the system.

The present application relates to a kind of plane five-pole closed-chain rehabilitation robot elimination modeling and force mapping control method, belong to rehabilitation robot control technical field.The method is aimed at the coupling of active joint and passive joint in plane five-pole closed-chain mechanism, control implementation difficulty under active joint coordinates and the problem that driving torque is difficult to accurately map as end force, establishes closed-chain position constraint equation, obtains velocity constraint relationship by derivation to constraint equation, under the nonsingular condition of passive joint constraint jacobian matrix, passive joint variable is explicitly eliminated, constraint consistent jacobian matrix is constructed, reduced dynamics equation under active joint coordinates is established, end force estimate is solved, and motor driving torque instruction is generated according to the end force estimate.The method is suitable for end impedance control, trajectory tracking control and rehabilitation training boost control of plane five-pole closed-chain rehabilitation robot.

The application discloses a control method and device of an inverter circuit and an inverter system, and belongs to the inverter field. The control method of the inverter circuit comprises the following steps: in the case that a grid performs a grid-connection and off-grid action, the minimum common-mode voltage between the neutral line and the protection ground line on the output side of the inverter is acquired; based on the number of point positions corresponding to the minimum common-mode voltage in the same power frequency cycle and the system delay time length, the target delay time length is determined; the system delay time length is determined based on at least one of the communication delay time length and the mechanical delay time length; after the target delay time length, the relay attraction instruction is issued; the relay attraction instruction is used for instructing the closing of the switching element. The control method of the inverter circuit can reduce the impact current generated in the moment of the closing of the contact, slow down the arc erosion of the relay, and prolong the service life of the relay.

The invention provides a liquid injection method of a soft package battery cell, which comprises the following steps: primary liquid injection, formation after the primary liquid injection, and secondary liquid injection after the formation, the opening of an air bag of the soft package battery cell is sealed before the formation and before or after the primary liquid injection, and the air bag is provided with a liquid supplementing device through the sealing, the gas bag is used for accommodating gas generated by formation, and after formation, the electrolyte is supplied to the gas bag through the liquid supplementing device so as to enable the electrolyte to enter the naked battery cell of the soft package battery cell, so that secondary liquid injection is realized. The liquid injection method of the soft package battery cell provided by the invention is high in realizability and simple in implementation process.

This invention discloses a device for real-time analysis of multidimensional information of spatiotemporally mode-locked pulses using an all-fiber structure, belonging to the field of ultrafast optics technology. It includes an all-fiber spatiotemporally mode-locked laser platform, a raw pulse beam profile measurement module, an optical circulator, a sub-pulse beam profile measurement module, and a dispersive Fourier transform and real-time spectral information detection module. Based on the generalized multimode nonlinear Schrödinger equation, this invention constructs a theoretical model of the spatiotemporally mode-locked laser, explores the multidimensional parameter coupling mechanism during spatiotemporal mode-locking, clarifies the mapping relationship between modes and frequencies, and provides a theoretical basis and method for high-precision mode differentiation and multidimensional real-time information extraction. This invention aims to rationally design the parameters of each fiber grating according to the spectral width and temporal interval of the spatiotemporally mode-locked pulse, reflecting more sub-pulses while ensuring that the pulse temporal domains do not overlap, achieving high-precision spatial mode resolution, and maximizing pulse broadening to obtain high-resolution real-time spectral information.

This invention discloses a method for detecting internal leakage in hydraulic cylinders and its application in TBM support shoe hydraulic cylinders, comprising the following steps: S1, acquiring stroke data of the hydraulic cylinder within a predetermined time t1; S2, cleaning and segmenting the acquired hydraulic cylinder stroke data; S3, acquiring and filtering pressure data of the hydraulic cylinder in each specified time period; S4, performing wavelet decomposition and reconstruction on each group of filtered pressure data; S5, calculating the proportion of the energy of each order of high-frequency reconstructed signal in the total energy of the original pressure signal to determine whether internal leakage has occurred in the hydraulic cylinder. This invention completes the detection of internal leakage in TBM support shoe hydraulic cylinders using only pressure and stroke data, without the need to establish a complex physical model based on the geometric parameters of the TBM support shoe hydraulic cylinder, thus improving calculation speed and detection efficiency.

The invention relates to the technical field of waste incineration, in particular to a waste incineration flue gas purification system tail energy recycling system and a working method. The system comprises a flue gas cooler system, a circulating water pump, a primary air heater, a secondary air heater, a demineralized water replenishing system, a sampling system, a blowdown system and a dosing system, the flue gas cooler system comprises a flue gas cooler, a plurality of circulating water heat exchange modules are arranged in the flue gas cooler, and the circulating water heat exchange modules are connected in series and / or in parallel; an outlet of the circulating water pump is connected with an inlet of the circulating water heat exchange module, an outlet of the circulating water heat exchange module is connected with circulating water inlets of the primary air heater and the secondary air heater, and a circulating water outlet of the primary air heater and a circulating water outlet of the secondary air heater are connected with an inlet of the circulating water pump through a water return pipeline. And a plurality of branches are arranged on the water return pipeline and are respectively connected with the demineralized water replenishing system, the sampling system, the sewage discharge system and the dosing system.

The application discloses a kind of commercial vehicle yaw-roll coordination control method and system, storage medium, comprising: obtaining vehicle mass, centroid longitudinal position, static zero moment point reference and static same direction lateral load transfer rate reference under static or quasi-static condition;Determine left and right side remaining roll margin, construct unbalanced load roll physical boundary;Dynamic zero moment point and same direction lateral load transfer rate are fused, and combined with active steering reachable margin, differential braking reachable yaw moment interval and tire adhesion remaining margin, the physical safety domain is contracted on line, and forms dynamic controllable safety domain;Additional front wheel angle and additional yaw moment of active steering are solved by coordination controller, and each wheel braking torque is obtained by differential braking optimization distribution.The application can solve the problem that yaw stability and roll stability are difficult to coordinate guarantee under the condition of unbalanced load, low adhesion, limited actuator and emergency steering for commercial vehicle.

This invention discloses an active noise control system and method based on an adaptive deep neural network. The system includes a reference signal acquisition unit, an error signal acquisition unit, a causal deep neural network controller, a lightweight adaptive module, and a parameter update unit. The method comprises the following steps: pre-training the causal deep neural network controller using an active noise control database; fixing the trained controller parameters and inserting a lightweight adaptive module with initial parameters of zero into the network; inputting the reference signal into the controller to generate a control signal to drive a secondary sound source to generate anti-noise, and using the error signal to construct the loss and calculate the gradient; freezing the main controller parameters during the control process, and only updating the embedded lightweight adaptive module online. This invention can improve robustness and control stability under complex operating conditions, reduce the dependence of deep neural network-based active noise control methods on large-scale training data, and improve noise suppression performance.

The invention belongs to the technical field of information security, and particularly relates to a random number security rapid evaluation method and device based on a neural network. According to the method, a random bit stream is mapped into a high-dimensional time state sequence by utilizing the high-speed nonlinear mapping capability of a photon reserve pool, and key time structure characteristics are highlighted by virtue of a time sequence mode attention mechanism, so that sensitive detection on random changes of a physical entropy source is realized. Compared with an existing method depending on a statistical test or a large-scale deep learning model, the method fully utilizes the high-speed calculation capability of the photon reserve pool neural network and the extraction capability of a time sequence mode attention mechanism on a key time structure, does not need complex model training, is light and efficient in calculation process, and is easy to implement. The method can be easily integrated with optical random number generator hardware, and is suitable for real-time minimum entropy evaluation of a high-speed physical entropy source.

This invention discloses a coordinated control method for a multi-module cascaded solid-state transformer, relating to the field of power electronics technology. The solid-state transformer includes multiple power conversion units, each employing a combined topology of front-end and rear-end conversion modules. Through the synergy of front-end voltage build-up control and rear-end optimal trajectory soft-start control, a phased and controllable soft-start strategy is constructed. First, the front-end actively builds up and equalizes the input buses at each stage, boosting and stabilizing the bus voltage within a safe operating range for startup, providing approximately constant input conditions for the rear-end stages. The rear-end stages employ an optimal trajectory control strategy, constraining the evolution paths of resonant current and capacitor voltage to achieve controlled power delivery, reducing problems such as overshoot, current surges, and excessive device stress during startup. Simultaneously, on the output side, phased control and a smooth transition mechanism ensure that the output voltage gradually builds up along a predetermined trajectory. After the system enters the steady-state operation stage, a post-stage steady-state optimization control method is proposed. The allocation coefficients of each module are used as unified optimization variables. The optimal allocation result is solved by a resource-aware distributed differential evolution algorithm. The allocation result is mapped to specific control inputs through the local controllers of each module, thereby optimizing the adaptive and coordinated operation mechanism of the post-stage system.

The invention relates to a protection routing method based on double completely independent spanning trees, which obtains a network with double completely independent spanning trees in a network topology structure with the node number not less than 14 and the edge number greater than (node-2) (node-3) / 2 + 4, and widens the limitation on the minimum degree. The topological structure in the network is constructed by using the edge number condition, which means that the method is suitable for more complex and diversified graph structures, has application potential in wide graph topology, and overcomes the limitation that the prior art cannot be applied in general graphs. According to the method, the construction process is simplified and optimized, and the universality and usability of the completely independent spanning tree construction are improved.

The disclosure provides an analysis and optimization method for focusing sensor optical parameters and silicon wafer film layer process parameters. The method comprises: constructing an error proxy model with focusing sensor optical parameters and silicon wafer film layer process parameters as inputs and highly process-dependent error as output; constructing a training data set to train the error proxy model until the model converges; according to a preset error target and parameter optimization range, using the error proxy model to globally optimize the focusing sensor optical parameters and the silicon wafer film layer process parameters, and obtaining an optimal parameter set meeting the preset error target. The disclosure establishes an error proxy model, which in principle accurately approximates the physical model of the focusing sensor and the multi-film layer structure of the silicon wafer. Through training and optimization, the evaluation accuracy of the error proxy model to the actual situation is improved, and the optimal parameter design is realized in combination with parameter optimization. The method does not rely on analytical calculation of the physical model, so that the parameter analysis and optimization process has higher realizability and faster calculation speed.

The invention relates to a wind power generation power prediction method, and belongs to the technical field of wind power generation power prediction. The method comprises the following steps: (1) data acquisition and processing; historical data, including wind power generation power sequence data and related meteorological data such as wind speed, wind direction, temperature, air pressure and the like, of a wind power plant are collected. And the data are spliced into a two-dimensional matrix, and the two-dimensional matrix is normalized to serve as data input of the next step. And (2) performing detail prediction on variable dimensions, replacing multi-head attention in a common Transform with improved cross attention by an encoder, performing attention operation between a wind power sequence and a meteorological sequence, and capturing a dependency relationship between time characteristics in a prediction variable and time characteristics in a meteorological variable. And (3) time dimension trend prediction: a decomposition window sliding strategy is combined with CEEMDAN, so that future information leakage is avoided, and meanwhile, the stability of a prediction sequence is improved. And (4) multi-dimensional prediction information fusion. And combining the prediction information of the time dimension with the prediction information of the variable dimension to obtain a final prediction result.

The utility model relates to the field of medical instruments, in particular to a medical guide wire flattening tool which comprises a flattening module and a cutting module, the flattening module comprises an upper pressing block and a lower pressing block, the upper pressing block is close to the lower pressing block through a flattening driving element, an upper pressing section is arranged at the bottom of the upper pressing block, and the width of the upper pressing section is consistent with that of a medical guide wire flattening section. The top of the lower pressing block is provided with a lower pressing section consistent with the upper pressing section in width, the upper pressing section and the lower pressing section are oppositely arranged, the cutting module comprises upper cutters, the two upper cutters are arranged on the two sides of the upper pressing section respectively, the upper cutters ascend and descend through a cutting driving element, and the cutting driving element and the upper pressing block ascend and descend synchronously. Combinations of various sizes are formed through extrusion cutting and flattening by means of cooperation of the upper cutter and the lower cutter in the flattening module, so that the problems of different elongation rates and different flattening sizes are solved, meanwhile, universality and realizability are improved, and product development is promoted.

The application relates to a dv / dt tolerance test circuit and method for a power device, which comprises a gate large-current driving circuit and a main circuit; the main circuit comprises MOS3, a device to be tested, a driving pulse generator V GS , a capacitor C2, resistors R G and R4, and a high-voltage direct-current voltage source V2; the gate large-current driving circuit is connected with the gate of MOS3, is used for controlling the fast turn-on and turn-off of MOS3, clamping the gate voltage of MOS3 at a safe value, and adjusting the size of dv / dt of the main circuit; at the moment of the turn-on of MOS3, one end of the capacitor C2 is forced to be grounded, so that the voltage across the capacitor C2 is rapidly applied to the device to be tested, and then a large dv / dt pulse voltage is generated. The application has higher reliability, the size of the dv / dt pulse voltage can be adjusted, the observation mode of indirect measurement has low precision requirement on the test equipment, the cost of the test equipment can be greatly reduced, and the realizability is high.

This invention discloses a method and system for personnel safety positioning in new energy power plants. The method includes: synchronously collecting raw location datasets of target personnel within the new energy power plant based on a preset positioning device / sensor; comprehensively analyzing the raw location data in the raw location dataset to determine the optimal estimated position of the target personnel at the current time point; comparing the optimal estimated position with a preset ideal position to determine the position deviation; if the position deviation is less than a preset position deviation threshold, the target personnel are currently within a safe positioning range and the optimal estimated position is output; through multimodal fusion positioning, the failure problem of single technology in environments such as obstruction, nighttime, and metal interference is overcome, and combined with area permissions, real-time alarms are achieved for personnel appearing in non-designated areas at non-designated times, thereby improving the safety index of staff.

The invention discloses an application display method, a control system, a display device, a vehicle, a terminal and a medium. The method comprises the steps that after it is detected that communication is established with at least one display terminal through a WiFi hotspot, pre-configured virtual screen information is acquired, and a virtual screen interface is generated according to the virtual screen information; and transmitting the virtual screen interface to a web service, and transmitting the first interface content of the virtual screen interface to a web page displayed on the display terminal through the web service. According to the method, the virtual screen interface is customized and generated according to the virtual screen information, it is ensured that the first interface content can be synchronously and correctly displayed and operated on different display terminals, the first interface content of the virtual screen interface is transmitted to the web page displayed on the display terminal, hardware cost and in-vehicle space resources are saved, and the user experience is improved. The convenience of application display is improved, the realizability of updating and expanding entertainment application functions is provided for the display terminal, and the user experience is further improved.

The embodiment of the present invention discloses an image processing method, device, terminal and storage medium, wherein the method comprises: obtaining a negative image to be processed and the initial color value of each pixel in the negative image in a target color space; performing inversion processing on the negative image to obtain inverted image data, wherein the inverted color value of each pixel in the inverted image data is determined according to the initial color value of each pixel in the negative image; performing value equalization processing on the inverted color value of each pixel within a value range corresponding to the target color space according to the inverted image data to obtain the digital color value of each pixel; obtaining the digital image data of the negative image according to the digital color value of each pixel; the digital image data of the negative image can be obtained conveniently, and the complexity of image processing can be reduced.

The application discloses a low-tolerance and high-sensitivity large-view-field main-focus astronomical optical system, which comprises a main mirror, a correcting mirror A, a correcting mirror B, a correcting mirror C, a correcting mirror D, a correcting mirror E, a correcting mirror F and a focal plane; wherein light is reflected by the main mirror, and then sequentially passes through the correcting mirror A, the correcting mirror B, the correcting correcting mirror C, the correcting mirror D, the correcting mirror E and the correcting mirror F to reach the focal plane; the main mirror is a concave aspheric mirror, and the surface shape is a quadratic hyperboloid or a high-order aspheric surface. The application realizes low machining and assembling tolerance sensitivity while ensuring excellent large-view-field imaging of the main-focus optical system; through analyzing the distribution of aberration on each optical surface, the position and structure parameters of special glass materials and the optical power of optical elements are optimized, the average of the contribution of each optical surface aberration is realized, and thus the machining and assembling tolerance sensitivity is reduced.

The invention provides a distributed robust load frequency control method for a multi-region power system, and relates to the field of power control, and the method comprises the steps: building a multi-region LFC system model; converting the multi-region LFC system model into a low-dimensional error system through tree transformation; performing robust consistency analysis based on a low-dimensional error system, and proposing a stability criterion meeting the performance; designing a distributed robust controller based on the stability criterion, solving the gain of the controller through a linear matrix inequality, and achieving the control of the distributed robust load frequency through a solving result. The technical scheme of the invention is suitable for a power system with three or more regions, and the communication topology is a switching structure and comprises full communication, partial communication and chained topology.

A container sealing device and its packaging container and application, wherein the cover member comprises a cover surrounding structure and a cavity tube structure, the inner wall of the cover surrounding structure is provided with threads, the head end of the cavity tube structure is open and the tail end is closed or the tail end is provided with a channel structure, the release member is provided with a sealing sheet with a thinning connection structure and a breakthrough structure, the release member is made of low-density polyethylene material with a tensile strength of 7.1-8.9 MPa and a breaking elongation of 50%-220% through mold injection molding, the release member can be installed and sleeved on the outer wall of the cavity tube structure of the cover member, the container sealing device can be installed at the neck opening of the container, and by screwing the cover member, the cavity tube structure breaks the thinning connection structure of the sealing sheet of the release member, and the sealing sheet is pushed to the outside of the cavity tube structure, so that the material in the cavity tube structure is released into the container; the present invention also provides a packaging container, a packaging composition, an assembly method of the container sealing device and the application thereof.

The application relates to the technical field of unmanned aerial vehicle flight data processing based on cloud computing, in particular to an unmanned aerial vehicle flight data processing method and system based on cloud computing, which comprises the following steps: receiving high-precision event data packages uploaded by an unmanned aerial vehicle at a data entrance of a cloud platform, and temporarily storing the high-precision event data packages; performing space-time correlation judgment on the temporarily stored high-precision event data packages to obtain a space-time correlation judgment result, so as to identify events with a space-time proximity relationship, wherein the space-time correlation judgment is performed under the constraints of a preset time window and a preset geographical range; after the events with the space-time proximity relationship are identified, logically binding the high-precision event data packages with the space-time proximity relationship according to the space-time correlation judgment result, forming an event group, and generating a group identifier for the event group; and routing the event group together with the group identifier to an event analysis processing channel. The above can help improve fault analysis efficiency.

The present invention provides a novel therapeutic means that is relatively low invasive and capable of exerting a desired therapeutic effect on diabetes including T1D. Specifically, an agent for protecting and / or regenerating a pancreatic β cell in a mammal with diabetes is provided, which contains a nucleic acid encoding a heparin-binding epidermal growth factor-like growth factor (HB-EGF), wherein the agent is systemically administered. The aforementioned preparation in combination with a nucleic acid encoding hepatocyte growth factor (HGF) is also provided.

The application provides a water network space optimization method and device, wherein, based on each space optimization measure, an initial water network space is optimized to obtain several optimized water network spaces; each optimized water network space is subjected to implementation feasibility evaluation to obtain implementation feasibility evaluation results of each optimized water network space; a space optimization scheme of the initial water network space is determined based on the implementation feasibility evaluation results of each optimized water network space; and based on the space optimization scheme, the initial water network space is optimized to obtain a target water network space. The above method can improve the implementation feasibility and optimization effect of water network space optimization.