18results about How to "Improve survivability" patented technology

The application discloses an insect exoskeleton morphological layup composite panel, a sandwich structure and a preparation method. The sandwich structure comprises two pieces of bionic layup composite panels and a piece of aramid honeycomb core layer. The bionic layup composite panel draws lessons from the spiral stacking microstructure of the insect exoskeleton, the layup design considers the symmetry and balance requirements of the composite material, a fixed rotation angle is introduced between adjacent fiber layers, and the rotation angle is taken as a period of 180 degrees, and after a plurality of periods are laid and heat-pressed and cured, the bionic layup composite panel is obtained. The bionic layup design effectively reduces the interlaminar shear stress of the composite material, weakens the inherent anisotropy of the composite material, and improves the transverse bearing capacity and impact resistance. The bionic layup composite panel and the aramid honeycomb core layer have the advantages of high specific strength, high specific stiffness, impact energy absorption, vibration and noise reduction, electromagnetic shielding and the like, and a structure and function integrated material with more excellent comprehensive performance is obtained, and the structure and function integrated material is expected to be widely used in main load-bearing structures of various spacecrafts.

This application discloses a knowledge- and data-driven elastic positioning method, system, and storage medium. The method includes: generating a knowledge graph based on a knowledge base in the positioning domain; the knowledge base includes multiple pieces of first knowledge information, including entity pairs in the positioning domain, relationships between entity pairs, and a first confidence level of the relationships; nodes in the knowledge graph represent entities, edges in the knowledge graph represent relationships between different entities, and the attributes of the edges include the first confidence level of the relationship represented by the edge; inferring a positioning model applicable to the target object based on currently available information sources, observation data of the available information sources for the target object, and the type of observation data; the positioning model includes positioning parameters, observation equations, and state transition equations; and locating the target object based on the observation data and the positioning model to obtain the positioning result of the target object.

This invention relates to the field of mine emergency rescue equipment technology, specifically a multimodal integrated platform for mine emergency detection and response. It addresses the problems of equipment being unable to enter low-lying tunnels after a mine disaster, poor environmental adaptability leading to easy overturning, slow emergency response, and short survival time in refuge areas during power outages. The platform includes a low-profile, flat, fully enclosed chassis, a ground-pneumatic composite drive system, an integrated mission payload, an energy and communication system, and an emergency power supply module. Key technical features include: a low-profile configuration adapting to extremely narrow spaces; four-wheel independent drive and four-corner ducted fans enabling omnidirectional movement, water surface floating, obstacle crossing, and autonomous righting after overturning; integrated panoramic detection and a horizontal submersible pump supporting rapid and relay drainage; and an added emergency power supply interface for temporary power supply to UPS, emergency lighting, and communication equipment in underground refuge areas, extending rescue waiting time. This invention integrates detection, drainage, and emergency power supply, and is suitable for rapid rescue and life support operations in mine collapses and water inrush accidents.

This invention provides a main and auxiliary power supply switching system and method with configurable power supply priority. The system includes a main power supply, an auxiliary power supply, an output power supply, and a switching circuit. The main power supply and the auxiliary power supply are two independently powered switching power supply circuits. The MCU main control circuit in the switching circuit controls the main and auxiliary power supply switching control circuit to adjust the main power supply voltage, creating a voltage difference between the output voltages of the main power supply and the auxiliary power supply, thereby achieving the switching of the main and auxiliary power supply priorities. This invention can achieve uninterrupted switching between the main and auxiliary power supplies and allows for flexible setting of the power supply priorities of the main and auxiliary power supplies based on actual application requirements. The circuit structure is simple, low-cost, highly reliable, and practical, effectively ensuring the power supply continuity and operational stability of the energy meter under complex operating conditions.

This invention relates to a collaborative configuration method and system for regional integrated energy systems that considers source-load fluctuations and high autonomy, belonging to the field of integrated energy system planning technology. It aims to address the problems of existing technologies failing to effectively handle uncertainties on both the source and load sides, the disconnect between planning and operation phases, and the lack of quantitative consideration of system autonomy capabilities. The technical solution includes constructing a multi-energy coupling architecture, modeling source-load uncertainties and generating multiple typical scenarios, establishing an integrated demand response model for electricity, heat, and cooling, designing a two-level stochastic programming model based on scenario analysis, and employing a hybrid optimization strategy for solution. This invention can significantly improve system robustness and reliability, reduce carbon emissions, enhance energy autonomy, optimize economics, and improve the supply-demand balance of multi-energy loads.

This invention discloses a tilt-lift short takeoff and landing (STOVL) aircraft and its control method, comprising a fuselage, wing assembly, multi-layered distributed propulsion system, tilt drive assembly, and control unit. The wing is hinged to the fuselage via a pivot in the mid-rear section of the chord, and the tilt drive assembly drives the wing to rotate and adjust the angle of attack. The multi-layered distributed propulsion system includes a first rotor assembly located in the mid-rear section to the wingtip region of the wing and a second rotor assembly located on the lower surface of the wing near the fuselage. During cruise, the first rotor assembly is stopped and feathered, and the propulsion system tilts synchronously with the wing. This invention, through a layered distributed propulsion layout and synchronous wing tilting for synergistic lift enhancement, solves the problems of insufficient control torque at low speeds and high cruise energy consumption, achieving a balance between STOVL performance and cruise economy.

The application discloses an underground intelligent early warning cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises, from inside to outside, a core assembly, a wrapping assembly and an outer sheath assembly. The core assembly comprises at least one conductive wire core and a communication optical cable unit. The conductive wire core is in a twisted distribution, and the communication optical cable unit is arranged outside the conductive wire core. Each conductive wire core comprises a conductor, a temperature sensing optical fiber conductor unit and an insulation layer. A copper tape shielding layer is arranged outside the conductive wire core. Mica tape is arranged in the gap of the core assembly. The outer sheath assembly is low-smoke halogen-free polyolefin. Through the application, the communication optical cable unit and the temperature sensing optical fiber conductor unit are arranged, and the communication optical cable unit is arranged in the gap surrounded by the conductive wire core, so that synchronous transmission and backhaul of monitoring information are realized. Operation data can be quickly transmitted through the communication optical cable unit, and the problems of dispersed monitoring signal link, unstable transmission and feedback lag of traditional cables are avoided.

This utility model belongs to the field of building intelligence technology and discloses a modular building gateway device supporting multi-protocol intelligent conversion. The device includes a core board module, an RS485 interface module, an Ethernet interface module, a USB interface module, and a power supply module. The RS485 interface module, Ethernet interface module, USB interface module, and power supply module are connected to the core board module. This utility model solves the technical bottlenecks of existing building gateways in terms of multi-protocol compatibility, configuration efficiency, and real-time performance. It breaks through protocol barriers and eliminates protocol obstacles for interconnecting heterogeneous devices; improves configuration and maintenance efficiency; adopts a multi-level isolation design to ensure communication stability in complex electromagnetic environments; and controls the conversion latency to within 50ms through hardware-accelerated protocol conversion, meeting real-time control requirements.

This invention provides an AC fault ride-through control device and method for wind power flexible DC grid-connected systems, belonging to the field of flexible DC transmission and new energy grid connection technology. Addressing the DC-side power redundancy and overvoltage issues caused by AC grid faults at the receiving end when wind power is connected to the grid via a modular multilevel converter (MWC) type HVDC transmission system, two control modes are proposed: First, when the DC voltage exceeds a preset threshold, the WFMMC initiates a step-down control; the energy storage system switches to a constant power control mode to adaptively absorb redundant power, and the wind turbine GSVSC maintains constant DC voltage control. Second, after the WFMMC initiates step-down control, the wind turbine GSVSC switches to a constant power control mode based on the grid connection point voltage deviation, and the energy storage system switches to a constant DC voltage control mode to absorb remaining power. This invention achieves redundant power storage, effectively suppresses DC voltage fluctuations, and improves the dynamic stability and operational reliability of the system during fault ride-through.

This invention discloses a multi-segment, large-angle two-dimensional vector nozzle, its method, and its application, belonging to the field of aero-engines. It includes a circular-to-square section, with a circular interface at the front end connected to the engine outlet, and an angle deflection mechanism arranged along the axial extension direction of the rear square outlet. The angle deflection mechanism includes circumferentially arranged side plates and follower components. Two side plates are symmetrically arranged on both sides of the rear square outlet, and two sets of follower components are coupled to the upper and lower sides of the rear square outlet, respectively, and located between the two side plates. The two side plates and the upper and lower follower components form the jet outlet. The follower components are composed of multiple angle adjustment plates sequentially hinged, allowing relative rotation between adjacent angle adjustment plates. By adjusting the rotation angle of each angle adjustment plate, the deflection angle of the jet outlet is adjusted, achieving a maximum deflection angle of 90°. This invention solves the problem that conventional two-dimensional vector nozzles cannot achieve large-angle vector deflection in the prior art.

The present application belongs to the field of microbial application and feed processing technology, and discloses a bacillus subtilis, named bacillus subtilis YT1, which is preserved in China Center for Type Culture Collection, located at Wuhan University, No. 299, Bayi Road, Wuchang District, Wuhan City, Hubei Province, with a preservation number of CCTCC NO: M 20242767 and a preservation date of December 10, 2024. The present application also discloses a microbial preparation and the application of the bacillus subtilis or the microbial preparation in the processing of silage. The present application first simultaneously possesses high efficient lignocellulose degradation ability, excellent fermentation promotion characteristics, significant antioxidant activity and good probiotic characteristics in a strain of bacillus subtilis. This characteristic enables a single bacterial agent to achieve multiple goals such as fiber degradation, fermentation promotion, oxidation protection, which traditionally requires multiple compounded bacterial agents, and fundamentally overcomes the problems of poor compatibility between strains, unstable synergistic effect and high application cost of existing compounded additives.

The invention discloses an unmanned aerial vehicle unpowered safe landing control method, device and equipment, and aims to solve the problem of stable landing of an unmanned aerial vehicle after power failure. According to the method, after power failure is detected, the method is divided into a gliding stage, a leveling stage and a taxiing stage according to the field height, in the gliding stage, the maximum lift-drag ratio and the corresponding target attack angle are determined based on aerodynamic characteristics of the unmanned aerial vehicle, the attack angle is limited in combination with the safety speed, and an elevator instruction is calculated through a PID controller in the gliding stage; in the leveling stage, an attack angle instruction is determined according to a gliding section tail end attack angle, a grounding target attack angle and a field height, and an elevator instruction is calculated by a leveling section PID controller; in the taxiing stage, attack angle control is transited to pitching control, a PID controller in the taxiing stage calculates an elevator instruction, stable attitude and bounce prevention are guaranteed, finally, the attitude of the unmanned aerial vehicle is controlled through control surface deflection, safe landing is achieved, and therefore accurate control over the whole process from high-altitude gliding to safe landing of the unmanned aerial vehicle under the unpowered condition is achieved.

The utility model discloses a window breaker and automatic window breaking system, window breaker includes casing, sliding seat, firing pin, first elastic part, drive arrangement and linkage assembly, linkage assembly can be linked with firing pin when firing pin is in window breaking position, to make firing pin enter force storage position under the drive of drive arrangement, or linkage assembly can be triggered by trigger part and remove linkage between firing pin when firing pin is in force storage position, to make firing pin break car window under the action of first elastic part, through above -mentioned structure can not only break car window automatically when the safety accident occurs, need not the passenger manual break, greatly improved the security of vehicle and the survival of the passenger under the emergency, and have compact structure, small volume's advantage, be favorable to reducing the demand to the installation space of car door.

This invention relates to agricultural biological control technology, aiming to provide a bamectin-degrading strain, Ldeb-1, and its application in enhancing the resistance of parasitic wasps. This strain is deposited at the China Center for Type Culture Collection (CCTCC), with the deposit name *Stenotrophomoans maltophilia* Ldeb-1 and the Latin taxonomic name *Stenotrophomoans maltophilia*, and the accession number CCTCC NO: M 20252462. The 16S rRNA gene sequence of the strain is shown in SEQ ID NO: 1. This invention provides a novel strain with outstanding degradation activity against the next-generation macrolide insecticide bamectin, offering a highly targeted and precise tool for addressing bamectin pesticide residue problems. Introducing a strain derived from a specific parasitic wasp species into its own species can enhance the parasitic wasps' intrinsic resistance to bamectin, representing a green, safe, and sustainable technology.

This utility model relates to the field of seismic technology in buildings, and more specifically, to a high-efficiency seismic connection structure for building design. A first connector and a second connector are respectively installed on different components of the building, facing each other. The facing surfaces of the first and second connectors are respectively provided with a first connecting groove and a second connecting groove. A first positioning protrusion is provided on the inner wall of the first connecting groove, and a second positioning protrusion is provided on the inner wall of the second connecting groove. The first and second positioning protrusions are compatible. A guide is provided on the first and second positioning protrusions. The damping component includes an energy-dissipating spring and a damper. The two ends of the energy-dissipating spring are fixedly connected to the inner walls of the first and second connecting grooves, and the two ends of the damper are hinged to the inner walls of the first and second connecting grooves. The damper is located between the two energy-dissipating springs. This design solves the problems existing in the prior art.

This invention relates to a method for heterogeneous multi-vehicle collaborative path planning and operation control in fisheries under high sea states. The method includes: acquiring meteorological data from the Yellow and Bohai Seas; fitting the wave surface elevation spectrum from the meteorological data to a modified JONSWAP spectral model, while simultaneously decomposing bimodal features to calculate wave encounter frequency; defining a parameterized roll risk function based on the wave encounter frequency to generate a four-dimensional spatiotemporal cost map containing dynamic resonance risk regions; during the harvesting and transfer process, using an improved A algorithm to perform global path planning on the four-dimensional spatiotemporal cost map, generating a zigzag path; and during the live fish handover process in the harvesting and transfer process, establishing a cost function including a relative motion suppression term, and solving the fixed-berth and dynamic docking of multi-vehicle collaboration through rolling optimization. This invention solves the problems of neglecting wave-induced resonance risk and instability in multi-vehicle dynamic docking, significantly improving the safety and success rate of unmanned operations in large-scale offshore aquaculture facilities.

This invention discloses an error-resistant robust image steganography method based on low-frequency embedding without background noise. The method includes: preprocessing and hybrid encoding the original secret image to generate a final secret embedding stream; performing a 5 / 3 integer wavelet transform on the carrier image to decompose the frequency domain, extracting the first-level low-frequency sub-band, calculating texture activity in blocks, and generating an embedding mask; setting the quantization step size and jitter bias based on quantization index modulation, adjusting the block mean based on the bits to be embedded, and superimposing the offset to complete the embedding; performing integer wavelet transform and block statistics on the received image, obtaining the initial bit stream using the minimum distance method of quantization index modulation, and reconstructing the output secret image through deinterleaving, error correction decoding, inverse whitening, and inverse scrambling. This invention solves the problems of poor security and weak resistance to burst errors in traditional steganography, achieving a balance between robustness and concealment, and improving the reliability of covert communication in complex channels.