4results about How to "No destabilization" patented technology

The application provides a multi-port electric-hydrogen coupling energy router control method, medium and system, belongs to the technical field of multi-port electric-hydrogen coupling energy router control, and is based on an enhanced electrochemical model to correct hydrogen production efficiency of an alkaline electrolytic cell online, dynamically issues a virtual impedance parameter to each port output impedance according to a bus voltage stability evaluation value, inputs the corrected hydrogen production efficiency and a power prediction value into a rolling horizon multi-working condition switching optimization algorithm based on Lyapunov stability constraint to output a power instruction and a working condition switching instruction, issues a running mode instruction and a power instruction to each port converter according to a corresponding control strategy of the working condition, and the converter level executes current inner loop control, PQ calculation and PWM phase shift control, so that the technical problem that the multi-port electric-hydrogen coupling energy router is caused to be unstable due to multi-port power voltage strong coupling oscillation in the multi-working condition switching process is solved.

The invention discloses a method for preparing a fibrous membrane from supercritical CO2, and relates to the technical field of plant extracts. The invention provides a method for preparing a fibrous membrane from supercritical CO2, which comprises the following steps: S1, mixing pretreated peony residues and wall materials, and carrying out supercritical CO2 treatment to obtain a mixture A; the pressure of the supercritical CO2 treatment is 7 to 13 MPa; the temperature of the supercritical CO2 treatment is 25 to 50 DEG C; and S2, carrying out electrostatic spinning on the mixture A, collecting fibers, and freeze-drying to obtain the fiber membrane. The supercritical CO2 process provided by the invention can overcome the problems of lengthy process, solvent residue, resource waste, poor spinning performance and the like, and realizes synergistic integration of essential oil extraction and residue-based functional fiber preparation.

The application discloses a postoperative rehabilitation abdominal bandage intelligent pressure regulating method and system, relates to the technical field of abdominal bandage intelligent pressure regulating, and comprises the following steps: wearing an intelligent abdominal bandage on a patient after abdominal surgery is completed and selecting a corresponding postoperative rehabilitation mode, loading target pressure parameters and completing initialization setting according to the postoperative rehabilitation mode; continuously collecting the pressure state of each region of the abdomen through a pressure collecting unit in the abdominal bandage, forming real-time pressure data, comparing the pressure data with a target pressure range, judging the current pressure state and generating a pressure regulating instruction; and adjusting the overall tightness state through the pressure regulating structure of the abdominal bandage according to the pressure regulating instruction, so that the abdominal pressure gradually reaches the set interval. Through intelligent closed-loop pressure regulation based on real-time pressure feedback, the application realizes dynamic and accurate control of the overall and local pressure of the abdominal bandage, and effectively improves the safety, stability and rehabilitation effect of postoperative abdominal support.

The invention discloses a multi-cable coupling wave propulsion system based on a rigid wing array and a geometric self-stabilization mechanism. According to the system, a vertical stable reference is obtained through a large-scale water surface frame, a main propulsion wing array is rigidly integrated on the system, and efficient and direct conversion of wave kinetic energy is achieved. A unique four-rope parallelogram mechanism is connected with a low-gravity-center underwater load module to form a geometric self-stabilization system with intrinsic posture recovery capability, so that rolling and pitching are greatly inhibited. The propulsive force of the system is stably transmitted through the quasi-rigid mechanism, and the low-efficiency mode that a traditional wave glider depends on oscillation pulling is eliminated. The core improvement lies in that an active navigational speed controller based on underwater airfoil attack angle adjustment is introduced, and navigational speed closed-loop accurate control is achieved through fine adjustment of system internal force balance. The problems that a traditional wave energy platform is low in efficiency, unstable and uncontrollable in navigational speed are solved, and a self-sustaining wave propulsion solution which is high in stability, long in endurance, intelligent and controllable is provided.