2results about How to "Small anti-interference ability" patented technology

The invention provides an anti-interference control method for the concentration of a main reactant in a continuous stirring reaction kettle process, belongs to the technical field of chemical process control, and solves the problem that in the chemical process of producing cyclopentanol by catalyzing electrophilic water with cyclopentadienoic acid, the concentration of the main reactant is not influenced. The technical problem that the concentration of a main reactant is difficult to track a set value without steady-state errors under the conditions of fluctuation of feeding concentration, uncertainty and external disturbance of the continuous stirring reaction kettle is solved. According to the technical scheme, the method comprises the steps of constructing a model pre-estimation compensator and an anti-interference control structure, designing a four-dimensional decision model, carrying out parameter collaborative optimization by adopting a multi-target genetic optimization algorithm, and carrying out optimal solution selection based on a TOPSIS method. Under the condition of feed concentration fluctuation, the dynamic response speed and the anti-interference capability of the system can be remarkably improved, and faster adjustment time, smaller overshoot and stronger robustness can be realized in linear and nonlinear models.

This invention discloses a method and system for measuring apparent resistivity based on a horizontal grounded dipole source using magnetic field frequency gradient. The method involves supplying power to the underground by laying a horizontal grounded dipole source on the surface, and setting up measuring points at a distance *r* from the horizontal dipole source to measure the radial and tangential magnetic field strengths. Based on the analytical expression of the magnetic field frequency gradient generated by the horizontal dipole source on a uniform half-space surface, the frequency difference between the radial and tangential magnetic field strengths is calculated using a differential algorithm, suppressing the primary field and highlighting the secondary field. The actual field value frequency difference is equivalently represented by the field value frequency gradient of the uniform half-space, and the apparent resistivity is solved using a numerical iteration method. This invention, by calculating the magnetic field frequency gradient to extract apparent resistivity, enables electromagnetic sounding under conditions of low induction numbers, effectively reflecting the deep electrical structure.