5results about How to "Overcome uncertainty" patented technology

The invention relates to the technical field of coal mine safety mining and roof disaster prevention and control, and discloses a roof directional long drill hole hydraulic fracturing multi-parameter effect discrimination method, which comprises the following steps of: firstly, constructing a multi-element heterogeneous integrated comprehensive discrimination system, and arranging micro-seismic, transient electromagnetic, drill hole peeping, bracket resistance and other monitoring units; acquiring surrounding rock background data before fracturing; real-time dynamic monitoring is carried out by utilizing pressure flow, reverse water and micro-shock during fracturing; carrying out static comparison and judgment by utilizing transient electromagnetism and peeping after fracturing; and the pressure relief effect is verified through support resistance and micro-seismic data in the stoping stage. And finally, performing cross validation from the dimensions of fracturing radius, pressure relief effect and water injection effectiveness based on multi-parameter data. According to the method, double-time-period accurate monitoring during fracturing and recovery is achieved, the limitation of single-means evaluation is overcome, and the comprehensiveness and accuracy of roof fracturing effect judgment are improved.

The application discloses a kind of based on reinforcement learning's failed spacecraft attitude quick adjustment method, comprising: step S1, based on spacecraft attitude end constraint, establish failed spacecraft attitude mathematical model and constraint model;Step S2, based on Long-term performance index function in reinforcement learning algorithm, establish evaluation standard and Critic network;Step S3, based on Backstepping control framework combines Action network and the Critic network, establish adaptive control method, to control failed spacecraft into end constraint domain.The application realizes the quick attitude adjustment of failed spacecraft before attitude motion evolution, enters predetermined ignition maneuver pointing.

The present application relates to the technical field of device testing method, and particularly relates to a kind of integrated vacuum pump testing method, comprising the following steps: establishing adsorption saturation state in closed test cavity, including filling mixed gas into test cavity, gradually reducing the temperature of cavity wall of test cavity, so that gas molecules are adsorbed on the inner wall of cavity;Apply sudden load to the vacuum pump to be tested, including starting the vacuum pump while triggering the infrared heating module, so that the temperature of the cavity wall of the test cavity rises to a predetermined temperature at a predetermined heating rate;Collect desorption dynamic parameters to generate desorption characteristic values, including real-time monitoring of gas release during the desorption process, combining desorption time constant and average vacuum, to calculate the release rate of adsorbed gas.The present application improves the accuracy and repeatability of evaluating the weak gas handling performance of the vacuum pump, and is suitable for quality detection and dynamic performance comparison analysis of high-sensitivity vacuum devices.

The application relates to the technical field of vehicle-mounted data processing, and provides a vehicle-mounted multi-source data fusion processing method and system, which comprises the following steps: according to logical association, identifying contradictory items existing in an environment understanding graph structure, and quantifying the degrees of the contradictory items to obtain contradiction degrees; obtaining the degree of conformity between a preliminary environment interpretation result and a preset rule; according to reliability scores, contradiction degrees and the degree of conformity, judging the root sources causing the contradictory items; applying weight reduction processing to the root sources to reduce the reliability scores corresponding to the root sources, and updating the confidence labels of nodes or logical associations of the environment understanding graph structure based on the reduced reliability scores to obtain the weight-reduced environment understanding graph structure, so as to complete vehicle-mounted multi-source data fusion processing; the nodes of the environment understanding graph structure are environment element nodes, which are used for representing the categories and spatial attributes of corresponding environment elements. The application has the effect of improving the decision-making capability of an intelligent driving vehicle.

This invention discloses a method and system for calculating the strength of surrounding rock based on the equivalent support reaction force of prestressed anchor bolts, relating to the field of surrounding rock data processing technology. The method includes: acquiring the initial mechanical parameters of the surrounding rock, tunnel excavation parameters, and anchor bolt support design parameters; calculating the cohesion increment, the elastic modulus of the anchor bolt-surround rock composite structure, and the equivalent support reaction force based on the design parameters; superimposing the cohesion increment with the initial cohesion of the surrounding rock to obtain the total cohesion; applying the equivalent support reaction force as a boundary condition to the bearing arch model; calculating the rock mass strength safety factor, the anchoring system efficiency coefficient, and the comprehensive deformation stability coefficient in parallel; and synthesizing the rock mass strength safety factor, the anchoring system efficiency coefficient, and the comprehensive deformation stability coefficient to obtain the final surrounding rock strength safety factor. This invention, through quantitative analysis, reduces the possibility of engineering risks and provides technical support for the special and complex engineering type of large-span tunnels.