24results about How to "Guaranteed achievability" patented technology

The invention provides a design of a deep cut-off negative optical filter. At present, the design thought of a negative optical filter film system mainly applies the main level of a reflecting film system, but the performance of a deep cut-off wave band and a transmission wave band is difficult to guarantee at the same time when the cut-off wave band width is between the main level cut-off width. The optical filter is divided into a front film system and a rear film system, and a high-level reflection band is applied, so that the optical filter achieves the purposes of deep cut-off and high transmission. The front surface film system structure and the rear surface film system structure are Sub (mHnL) S1Air and Sub (pHqL) S2Air respectively, Sub is a substrate, (mHnL) S1 and (pHqL) S2 are optical filter film systems, Air is air, m, n, p and q are matching coefficients of different materials, Chebyshev polynomial characterization shows that the three-level reflection band width depends on the matching coefficients of the materials, the matching coefficients of the different materials are added to form a fixed value, S1 and S2 are film system cycles, and m, n, p and q are the number of cycles of the film systems. H and L respectively represent lambda / 4 optical thicknesses of the high-refractive-index material and the low-refractive-index material, and lambda is a reference wavelength. The design provided by the invention can be widely applied to the design of the deep cut-off negative optical filter.

The invention provides a lithium carbonate continuous crystallization anti-scaling industrial method, a lithium carbonate crystal and application. The industrialization method comprises the following steps: S1, providing a lithium carbonate seed crystal solution, and adding the lithium carbonate seed crystal solution into a crystallizer; s2, simultaneously adding the lithium-containing solution and the sodium carbonate solution into the crystallizer, and stirring and mixing the lithium-containing solution and the sodium carbonate solution with the lithium carbonate seed crystal solution to obtain a reaction solution to be crystallized; s3, the solution to be crystallized is subjected to a constant-temperature reaction, and lithium carbonate crystals are obtained; wherein on the basis of the total mass of the lithium element in the lithium carbonate seed crystal solution and the lithium element in the lithium-containing solution, the mass ratio of the lithium element in the lithium carbonate seed crystal solution is 12.5%-30%. According to the lithium carbonate continuous crystallization anti-scaling industrial method provided by the invention, an initial site is provided for crystal nucleation through seed crystal strategy nucleation according to the heterogeneous nucleation characteristic of lithium carbonate, and lithium carbonate particles can be prevented from nucleation at the bottom or four walls of the crystallizer and further deposition and scale formation.

The invention discloses a mechanical arm visual servo and safe obstacle avoidance method based on a disturbance observer, and belongs to the field of visual servo control of robots. Establishing a second-order model of visual servo based on the image and constraint of visibility of the feature object; enveloping simplification of the mechanical arm is completed, and safety constraints related to the robot are established; regarding an item which is not easy to calculate in the visual servo model as uncertainty, and designing an extended state observer to observe the pixel speed and the uncertainty; establishing a CBF constraint according to a safe distance constraint, an angular velocity and an angular acceleration constraint under an ideal condition, and then establishing a CBF considering uncertainty; and finally, designing a reference controller considering uncertainty, and solving a safety optimization problem based on the CLF of the preset time and the optimization solving objective function. The method is high in efficiency and good in stability, it can be guaranteed that the robot arm can rapidly estimate the uncertainty, and the uncertainty estimation value can be applied to the safety constraint after being obtained.

The invention discloses a method for inhibiting laser processing damage of a heterogeneous material, which comprises the following steps: a processed material is immersed in an auxiliary liquid, so that the processed part of the processed material is fully infiltrated by the auxiliary liquid, the processed material is a solid heterogeneous material, and under the central wavelength of used laser, the room temperature complex refractive index of the processed material is n1, the effective complex refractive index of the auxiliary liquid at the working temperature is n2, and n1 and n2 meet matching conditions; and the machined material is subjected to laser subtractive machining, and the residual auxiliary liquid is removed after machining is completed. By selecting proper auxiliary liquid and applying optical parameters matched with the auxiliary liquid, binary interaction of the laser and the heterogeneous material is converted into interaction of the laser, the heterogeneous material and the auxiliary liquid, so that comprehensive effects of stray light suppression, micro-stripping effect of a thermal damage area caused by laser-induced cavitation, suppression of a heat affected area by liquid cooling and the like are achieved; and the processing quality of the heterogeneous material is obviously improved.

The invention relates to a low-fault-energy micro-twin synergistic deformation cobalt-based alloy and a preparation method thereof, and belongs to the field of cobalt-based high-temperature alloys. According to the alloy, on the basis of Co-Al-W, Ti and Ta which are smaller than or equal to 4 wt% are added according to calculation of a first principle, and the stacking fault energy is controlled to be-95 mJ / m < 2 > to-89 mJ / m < 2 > (0K). Aiming at the defect of insufficient high-temperature plasticity of the gamma '-phase strengthened cobalt-based alloy, an electronic structure is accurately regulated and controlled through a first principle, intrinsic stacking fault energy is designed to reach an optimal negative value interval, a micro-twin mechanism is activated, dislocation slippage and micro-twin coordination is realized, and the problem of sudden plasticity drop caused by single deformation mechanism (dislocation slippage leading) and grain boundary weakening of a traditional alloy is solved; the high-temperature strength and the plasticity are synchronously improved.

The application relates to the technical field of standard gas preparation, and discloses a pressure method for preparing carbon dioxide and carbon stable isotope standard gas, and a system thereof. The method comprises the following steps: obtaining basic parameters for gas preparation, calculating core pressure control parameters of gas preparation operation based on the mass conservation of carbon dioxide and the mass conservation of carbon stable isotopes, and sequentially completing the steps of filling decarburization atmosphere through an adsorption tube, filling high-concentration raw material gas through a quantitative ring, and supplementing the final pressure with ambient atmosphere, so as to complete the preparation of standard gas. The method can accurately control the carbon dioxide concentration and the carbon stable isotope value simultaneously, is suitable for a conventional pressure method gas preparation device, has high preparation precision and strong repeatability, and meets the high-precision standard gas use requirements of atmospheric observation, equipment calibration and the like.

The invention relates to the technical field of environmental protection, in particular to a manipulator used for steel slag treatment and a steel slag treatment system and method based on image processing. The mechanical arm comprises a base, a first movement hand, a second movement hand and a movement control mechanism, wherein the first movement hand, the second movement hand and the movement control mechanism are arranged on the base. The first movement hand comprises a plurality of first fingers which are uniformly distributed, the second movement hand comprises a plurality of second fingers which are uniformly distributed, and the first fingers and the second fingers are oppositely arranged; the motion control mechanism controls the first motion hand and the second motion hand to move between a first state and a second state. A special mechanical arm structure is used for grabbing or screening granulated steel slag, waste steel with the large iron content is fished out, the waste steel is grabbed out in a closed space in cooperation with the image processing technology, and environment pollution is avoided while the waste steel is picked out.

The invention provides a physical layer secure transmission method based on multipath selection independent transmission, which comprises the following steps of: firstly, acquiring multipath channel state information of legal users by using a large-scale MIMO (Multiple Input Multiple Output) channel estimation method; and secondly, performing multipath selection based on the multipath channel state information, matching an additive uniquely decomposable constellation group according to the multipath number, performing precoding design, and eliminating symbol interference among multiple paths, so that a legal user side receiving signal meets the sum constellation design of the additive uniquely decomposable constellation group, and further realizing accurate detection of a receiving symbol. In a single-user scene, the method only needs to perform multipath selection so as to improve the secrecy capacity. In a multi-user scene, a multi-path and user two-stage selection process needs to be carried out, that is, multi-path selection is carried out on multiple users to determine an optimal path combination, and then user selection is carried out based on the optimal path combination of each user, so that the secrecy capacity of the system is improved.

The invention relates to the technical field of logistics storage, and discloses a warehouse management system, a tailing management method and device thereof and a medium, and the method comprises the steps: obtaining the current tailing data in the warehouse management system, and generating a tailing merging storage report based on the current tailing data; in response to the target tailings to be merged and stored selected by the manager from the tailing merging and storing report and the set target ex-warehouse position, creating a corresponding ex-warehouse task; based on the ex-warehouse task, ex-warehouse the target tailings to be merged and stored to the target ex-warehouse position, so that a manager carries out merged storage on the target tailings to be merged and stored at the target ex-warehouse position; and in response to a combined storage result sent by the manager, performing warehousing management on the combined and stored target tailings. According to the invention, flexible management of the tailings in the warehouse is realized, the occupation of the tailings on the warehouse capacity is reduced, the warehouse management efficiency and the material utilization rate are improved, and a large amount of tailings are prevented from becoming intact materials.

The present invention relates to a method for manufacturing a full-suture outer-row anchor, a full-suture outer-row anchor and a method for using the same, and belongs to the technical field of medical devices. The full-suture outer-row anchor manufactured by the manufacturing method uses a traction line with a pre-built-in locking knot. During surgery, the traction line is used to introduce the inner row of sutures into the full-suture nail body, that is, the inner row of sutures are introduced into the full-suture nail body along the original path of the traction line in the nail body, thereby solving the technical problem that the inner row of sutures are difficult to introduce into the full-suture outer-row anchor. In addition, the original path of the traction line can be used to form a knot of the inner row of sutures, thereby achieving a technical effect of knot-free. The method for using the full-suture outer-row anchor can effectively prevent the occurrence of situations such as slippage or disintegration of the inner row of nail sutures by an operation mode of implanting first and then guiding the wire, thereby ensuring the feasibility of the surgical operation. The self-locking knot structure is formed by unidirectional tightening, and the operation is more convenient and the knot shape is more reliable, thereby providing reliable support for soft tissue repair and fixation.

The present application relates to finite time reduced dimension observer design method and chaotic communication system, belong to information security and chaotic communication field. In view of the defects of traditional asymptotic observer slow, time is uncontrollable, sliding mode method exists chattering and message signal pollution output is difficult to construct observer, the present application establishes the chaotic drive system containing message signal embedding, constructs the equivalent system without unknown signal, designs finite time reduced dimension observer based on observer matching condition and strong observable condition. Compared with the traditional asymptotic convergence observer method, the present application can realize the complete synchronization of chaotic system within the user preset time, adopts continuous control law without chattering, and the message signal can be accurately recovered through algebraic formula. The synchronization time of the present application is controllable, the convergence speed is fast, the recovery precision is high, and the robustness is strong, which is suitable for various chaotic secure communication scenes, effectively improves the communication real-time, security and engineering practicability.

The present application relates to the technical field of ultra-precision machining control, and particularly relates to a modal controller generation method for a nano-positioning platform, a medium and equipment. The present application performs zero-pole decomposition on a transfer function of a controlled object, separates stable zero points, unstable zero points, non-resonant poles and resonant poles, constructs a desired inner loop closed-loop transfer function, retains the stable zero points, the unstable zero points and the non-resonant poles, and replaces the resonant poles as a whole with high-damping desired poles, inversely solves to obtain a modal controller structure, introduces zero-pole cancellation constraints to eliminate controller instability caused by unstable zero points, introduces order constraints to ensure causal realizability, applies constraints with a damping ratio greater than 0.1 to the desired poles and the introduced new zero points respectively, and outputs an inner loop modal controller. The present application realizes simultaneous suppression of multiple resonant peaks, gets rid of dependence on a low-order model, ensures stability, realizability and smoothness of a control signal of the controller, and significantly improves control bandwidth and dynamic performance.

The invention discloses a method and device for optimizing the sound effect in a passenger vehicle cabin, and relates to the technical field of vehicle-mounted audio signal processing, and the method comprises the steps: obtaining an initial reference response vector representing the factory ideal state of a loudspeaker; when the monitoring trigger condition is met, controlling a power amplifier to generate a standard test excitation signal to drive a loudspeaker group, and constructing a current state response vector through a voice acquisition unit; constructing a spectrum deviation vector based on the difference value, and eliminating the frequency response interference of the acquisition unit by using a relative measurement mechanism; calling a preset sound field transfer function matrix model, taking the spectrum deviation vector as input, and calculating a channel gain adjustment vector through an inverse problem solving algorithm containing regularization constraint; and finally, updating audio processing parameters according to the vector and executing closed-loop checking. According to the invention, by using the existing vehicle-mounted hardware, automatic monitoring and accurate compensation of the aging characteristic of the loudspeaker are realized, and the sound effect consistency in the vehicle life cycle is effectively maintained.

The application discloses a kind of small concave Offner spectral imaging systems based on active optics, design method and aberration correction method, belong to spectral imaging technical field.The system includes the concave spherical surface reflection main mirror of ball center coincidence, convex spherical surface grating and deformable concave spherical surface reflection three mirrors;Light beam is shot into by incidence slit, is reflected to grating spectroscopy by main mirror, then is imaged after being reflected by three mirrors.Design method adjusts curvature radius ratio and off-axis amount to make astigmatism meet requirements to determine initial structure, and surface shape coefficient is solved after optimization and surface shape is iteratively adjusted to within range.Aberration correction method is solved by constructing wave aberration matrix and driver response matrix to correct aberration.The application realizes the imaging of super-long slit large field of view at the same time, simple structure, easy to assemble and adjust, can realize the integration of large field of view general survey and local high-resolution detailed survey imaging.

The invention relates to the technical field of electromagnetic separation, and provides a magnetic pole optimization method and an isotope separation device.The optimization method comprises the steps that a shimmed finite element model is established; setting characteristic parameters of the section shape of the finite element model; the characteristic parameters are used for simulation calculation of particle beam transport, and a simulation result is obtained; and determining the characteristic parameters according to the simulation result. According to the optimization method provided by the embodiment of the invention, the design time of the magnetic pole can be shortened, and the mechanical design difficulty is reduced.

This invention discloses an additive manufacturing-based inertial amplification nonlinear low-frequency vibration isolation metamaterial structure, vibration isolation device, and its performance control method. The vibration isolation metamaterial structure includes a rhombic frame structure, an inertial amplification unit, and a square spring structure. The square spring structure is arranged within the rhombic frame structure, with its two ends connected to a pair of opposite corners of the rhombic frame structure. The elastic extension direction of the square spring structure is parallel to the diagonal of this pair of opposite corners of the rhombic frame structure. The inertial amplification unit has a centrally symmetrical structure, including a rigid rod, two counterweights, and two diagonal rods. The center of symmetry of the inertial amplification unit, the center of the rhombic frame structure, and the center of the square spring structure all coincide in projection. Therefore, the vibration isolation metamaterial structure of this invention significantly widens the bandgap range and enhances low-frequency vibration isolation performance, exhibiting excellent performance in suppressing longitudinal waves in the 0-1000Hz low-frequency range, increasing vibration damping, and energy absorption.

The invention discloses a quad-rotor unmanned aerial vehicle adaptive fault-tolerant control method based on event triggering. For actuator multiplicative / additive faults caused by motor efficiency degradation, centroid offset and the like, an attitude-position unified dynamical model is established under external disturbance, and a position-attitude double-ring structure is adopted: a position ring generates an expected attitude and total thrust by using a radial basis function neural network (RBF) backstepping adaptive control; the attitude ring compensates a composite fault based on RBF backstepping adaptive control, introduces an event trigger mechanism, updates control input only when an error exceeds a threshold value, and maintains the control input at a zero order at other moments. A Lyapunov method proves that a closed-loop system realizes consistent final bounded stability in the presence of a composite fault and external disturbance, and a trigger interval right lower bound is given to avoid a Zeno phenomenon. According to the method, the trajectory tracking precision can be improved and the calculation and communication overhead can be reduced under the fault working condition without adding hardware, and a powerful reference is provided for specific implementation of engineering practice.

Embodiments of the present application disclose a task playback method, device, equipment, medium and product. The method comprises: in the case of playing back first task data through at least one hardware queue, if the playback of the first task data is interrupted, obtaining a context snapshot of the first task data based on a target queue, and storing the context snapshot, the context snapshot being used to indicate the playback progress of the first task data, and the target queue being a queue in the hardware queue that generates playback interruption when performing playback on the first task data; in response to the first task data being triggered to resume playback, loading the context snapshot of the first task data; and resuming playback of the first task data based on the context snapshot. The logical queue continuity is maintained in the case of abnormality by switching the playback task, the realizability and stability of task playback switching are ensured, and the task playback efficiency is improved.

The present invention discloses a control transmission joint design method based on the full loop information age, and relates to the technical field of the full loop information age. The present invention performs control and transmission joint design based on the full loop information age, and the control strategy of the controller and the trigger strategy of the event trigger are both based on the full loop information age. The time sensitive network is a deterministic transmission mechanism, and the routing and scheduling schemes are obtained by modeling and optimizing based on the full loop information age, so as to ensure the deterministic and reliable transmission of the data stream transmitted in the network and improve the overall performance of the industrial information physical system.

The utility model provides an air outlet assembly and an air conditioner indoor unit with the same. The air outlet assembly comprises a framework, a mounting frame and an air outlet frame. And an air outlet channel is arranged on the framework. And the mounting frame is arranged in the air outlet channel. The mounting frame is provided with a mounting hole and a notch penetrating through the peripheral wall of the mounting hole. The air outlet frame is rotatably arranged in the air outlet channel. A first rotating shaft is arranged on the air outlet frame and installed in the installation hole through the notch. The problem that the air outlet frame needs to move by a large distance in the axial direction of the rotating shaft in the installation process of the air outlet frame under the condition that the connection stability of the rotating shaft is guaranteed, so that the air outlet frame is prone to being interfered by a framework or other parts of the indoor unit of the air conditioner can be solved, and the purpose that installation of the air outlet frame is easier to operate is achieved.

The invention discloses a design method of a coupling lens group of an optical shutter for a point ring fiber laser. The coupling lens group of the optical shutter comprises a collimating lens and a focusing lens. The collimating mirror and the focusing mirror which are sequentially arranged behind the output optical fiber of the ring laser are adopted to realize coupling of the optical gate, and the reflecting mirror is added to realize different outputs of the optical path. The lens group with the optimal coupling effect in the optical shutter is scientifically and accurately designed, so that a central circular light beam and an annular light beam emitted by a point annular laser are coupled through the coupling lens group, enter an annular optical fiber and are converged at a fiber core and an annular core, and high-efficiency coupling of the laser optical shutter is realized.

The embodiments of the present application provide a method for searching for an image, a method for generating description information, a device and a storage medium, wherein the method for searching for an image comprises: obtaining search information; based on the image description information of at least one image, searching for a target image that matches the search information in the at least one image; wherein the image description information is generated based on the image content data; and outputting the target image. Accordingly, in the embodiments of the present application, in the absence of information such as a title and context in the scene in which the image is located, the image description information can be analyzed from the content contained in the image itself. This ensures the feasibility of the image search operation in the above-mentioned specific scenario, and the image description information generated thereby can more accurately represent the image, thereby effectively improving the accuracy of searching for images.

This invention relates to the field of ridge filter design technology, and discloses a design method, system, device, and storage medium for ridge filters. The method includes acquiring first and second actual water depth dose distribution data for proton and heavy ion beams with multiple energies; performing Monte Carlo simulation on the proton and heavy ion beams to obtain a Monte Carlo beam model; constructing a geometric optimization model for the ridge filter using its geometric parameters as optimization variables, maximizing its performance index as the objective function, and using geometric parameter constraints as constraints; and solving the geometric optimization model using a particle swarm optimization algorithm to obtain the optimal geometric parameters. This invention can improve the parameter design accuracy of ridge filters, reduce the processing accuracy requirements of ridge filters, improve the flatness of the effective biological dose in the extended Bragg peak, and reduce the radiation risk from secondary neutrons.

This invention relates to the field of wireless communication and signal processing technology, specifically to a shortwave spectrum high-efficiency sampling method and system based on compressed sensing. The method includes: acquiring power spectral density data across the entire frequency band using a low-speed scanning receiver; determining a set of strong interference frequency points; generating a binary null observation sequence; loading the binary null observation sequence onto an analog front-end mixer circuit to perform analog domain orthogonal mixing and integration processing on the input RF signal, outputting voltage sample values; calculating signal sparsity coefficients using a compressed sensing reconstruction algorithm; calculating the reconstruction residual based on the voltage sample values ​​and the signal sparsity coefficients; triggering a re-acquisition process of power spectral density data in response to the reconstruction residual exceeding a preset error threshold; and outputting the signal sparsity coefficients in response to the reconstruction residual being less than or equal to the preset error threshold. This invention solves the problems of limited dynamic range and weak signal overload, significantly improving the receiving sensitivity of weak signals under strong interference environments.