3 results about "Experimental methods" patented technology

The invention relates to a low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method belonging to the field of low-permeability coal seam reinforcement anti-reflection technology. The low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method adopts a low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device, and comprises the following steps of: (1) installing a monitoring element; (2) measuring the coal permeability before anti-reflection; (3) starting a high-pressure gas impact system for impacting coal briquettes in a circulating way; and (4) measuring the coal permeability after anti-reflection; and the low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device comprises a coal sample, a blasting cylinder mechanism, a triaxial loading system, a high pressure gas impact system and a coal permeability measurement system.

The invention discloses a structural material ultra-high temperature corrosion experiment system and method under a serious accident of a nuclear reactor. The system comprises a gas supply system, a vacuum system, an experiment section, a cooling system and a tail gas analysis system; the gas supply system can be used for preparing corrosive gases with different water vapor contents; the experiment section is composed of a high-temperature radiation furnace, a low-temperature radiation furnace, a ceramic reaction tube, a heating wire, an air-cooled copper tube and heat preservation cotton, andtwo quartz glass windows are formed in the side wall of the high-temperature radiation furnace and used for containing a high-speed camera and an infrared temperature measurement probe respectively;the cooling system can provide necessary cooling for key equipment; the tail gas analysis system can measure the concentration of each component of the corrosion reaction tail gas on line, so that high-precision continuous measurement of reaction kinetics is realized; the experiment system further comprises a power distribution system, a numerical control system and a data measurement and acquisition system. The invention further provides an experimental method. By using the method and system, key data are provided for nuclear reactor safety design by carrying out a structural material ultra-high temperature corrosion experiment in a severe accident environment of the nuclear reactor.

The invention discloses a method for building a fractal dimension-based multi-phase mixed effect prediction model, which comprises the following steps of: (1) acquiring a multi-phase stirring mixing real-time pattern by using electron tomography or a high-rate camera; (2) computing the fractal dimension of the acquired real-time pattern by using a compiled box dimension computation program; (3) acquiring previous relative data of each period at every interval by using the method in step (2) to obtain a corresponding time sequence; (4) computing a time delay variable, an embedded dimension and a bandwidth by using the time sequence obtained in step (3) and by using a phase reconstruction method; (5) processing the time sequence in the step (3) by using a one-step-forward method and kernel regression prediction to obtain an entire time sequence; and (6) testing and verifying a prediction error by using an experimental method. The invention provides a reliable and practical prediction method for predicting the mixed effect of chemical engineering experiments and theoretically instructing stirring reactor design, stirring operation and correction experiments.