3results about How to "Overcome failure" patented technology

The application discloses a hydrological model parameter calibration method and system based on a system differential response relationship, and the method comprises the following steps: obtaining input time series data required for model operation, obtaining hydrological observation time series data, and constructing a hydrological model; generating an initial parameter set by random sampling in a given value range, driving the hydrological model by the initial parameter set, and constructing a system differential response relationship formula of initial parameter error and model output simulation error; obtaining an initial parameter error iterative solution formula based on an iterative shrinkage threshold algorithm, determining the coefficients in the solution formula, and substituting the coefficients into the solution formula to solve the initial parameter error; and accordingly, the initial parameter is optimized until the parameter converges, and finally, a final parameter calibration result is obtained. The application effectively constructs the response relationship of the parameter error and the model simulation error, and solves the parameter error by using the iterative shrinkage threshold algorithm with high numerical stability, thereby improving the hydrological model parameter calibration efficiency and the accuracy of hydrological simulation.

The invention relates to the technical field of intraocular lens growth, and discloses an intelligent regulation and control system for large-scale production forming of a cubic zirconia material. Comprising a central cooperative control module, a partition cooling data monitoring module, a contact thermal resistance liquid level analysis module, a vertical temperature gradient construction module and an induction energy dynamic matching module, and the partition cooling data monitoring module, the contact thermal resistance liquid level analysis module, the vertical temperature gradient construction module and the induction energy dynamic matching module are connected through a bus. The vertical temperature gradient construction module constructs a vertical heat flow channel by adjusting the flow velocity difference of cooling water on the side wall and the bottom. The induction energy dynamic matching module dynamically adjusts the radio frequency output power according to the liquid level height; the central cooperative control module overall plans the whole process of raw material melting, crystal growth and annealing shutdown according to thermodynamic characteristics. The technical problems that the liquid level of the high-temperature melt is difficult to monitor and the thermal field is difficult to control are solved, automatic closed-loop control over crystal growth is achieved, and the structural uniformity and the yield of large-size single crystals are remarkably improved.

The application discloses a kind of transient voltage support promotion methods of net type converter adaptive voltage feedforward, belong to new energy grid-connected control technical field.The method first considers the dynamic voltage disturbance immunity index of inner loop control of converter to describe the transient voltage support capability of converter under different inner loop control parameters, structure, then a kind of voltage support type feedforward is designed based on the saddle point optimization of Lagrange function, and the inner loop current control bandwidth is limited to collaborative optimization.The algorithm can be used as a reference for the design of converter voltage feedforward control, and provides an optimal parameter design method, which has certain significance for the evaluation and improvement of the transient voltage support capability of grid-connected converter.