6 results about "Near critical" patented technology

The invention discloses an AI auxiliary operation scheduling and compliance identification method for operation under a high-voltage line. The method comprises the following steps: firstly, according to an actual layout path, a voltage grade and a protection boundary of a high-voltage line, constructing a three-dimensional coordinate system matched with the terrain for delimiting a dangerous grade area; in the operation process, the spatial position and attitude parameters of the operation machine and the position point location information of an operator are continuously collected and converted into a track input data set. Through construction of a continuous track sequence and spatial difference analysis, operation behaviors exceeding a safety boundary or approaching a critical height are identified, and key space-time and equipment information is extracted. And performing risk classification on the abnormal behaviors in combination with the construction plan and the field progress, and generating a dynamic scheduling suggestion according to the current operator density and the equipment arrangement condition. The suggestion can be synchronously pushed to a field terminal, and is linked with a voice broadcast and warning device to carry out early warning, so that active intervention and scheduling optimization of high-risk operation behaviors are realized.

The invention discloses a method for predicting concrete damage based on a critical moderation theory of acoustic emission parameters. According to the method, an acoustic emission monitoring system is constructed, data such as stress, strain and temperature of a concrete structure are collected in real time, and the variance and the autocorrelation coefficient of the concrete structure are calculated. And in combination with the critical moderation model, the damage state of the concrete structure is evaluated, the damage evolution trend is predicted, and a damage early warning signal is sent out when the damage is close to a critical point. The method has high sensitivity and accuracy, can be widely applied to health monitoring and life prediction of structures such as concrete bridges, buildings and tunnels, and provides a scientific basis for structural reinforcement and maintenance.

The invention discloses a deep subcritical reactivity measurement method and system based on an alpha fundamental wave eigenvalue and a computer readable medium, and relates to the technical field of reactor physics and experiments. The measurement method comprises the following steps: acquiring an alpha fundamental wave eigenvalue of a reactor system and a corresponding alpha fundamental wave neutron flux density; based on the alpha fundamental wave neutron flux density, calculating the effective neutronics time Lambda eff and the delayed neutron effective share beta eff of the reactor system; and substituting the alpha fundamental wave eigenvalue, the effective neutron generation time Lambda eff and the delayed neutron effective share beta eff into a preset reactivity rho calculation formula to obtain a deep subcritical reactivity measurement value of the reactor system. According to the method, the alpha fundamental wave neutron-flux density matched with the physical characteristics of the deep subcritical system is adopted to replace the k-mode fundamental wave neutron-flux density which only has physical significance in a near-critical system, the theoretical error of a traditional method under the deep subcritical working condition is fundamentally corrected, and therefore the accuracy of reactivity measurement is effectively improved.

The present invention relates to a reduction method for improving segregation of billet crankshaft steel. The method comprises: casting molten steel through a continuous casting machine with full protection and producing the billet at a constant drawing speed; controlling the reduction amount of each straightening roller position of the continuous casting machine according to the solid phase ratio of the billet in a lower region; determining a maximum reduction rate at a region where the solid phase ratio of the billet is 65%-95% at a rate close to a critical strain rate, serving as the reduction rate at the entrance of this region; gradually decreasing the reduction rate along the billet drawing direction; reducing the average reduction rate as the drawing speed increases, adapting to timely reduction as the drawing speed increases, and making maximum use of the reduction effect; avoiding the reduction region being too biased toward the liquid phase region, which results in failure to improve the center segregation; avoiding the reduction region being biased toward the solid phase region, which results in adverse effects on the internal quality of the billet; and coordinating the total deformation of the reduction region to avoid excessive reduction, which results in negative segregation of a bright white band, inverse V-shaped segregation, or cracks. The billet center segregation index is 0.93-1.05, and the carbon segregation extreme fluctuation is ≤0.03%.

The application discloses a kind of anti-misoperation control methods of telescopic support, it includes: real-time acquisition of the current state of support and wind data;When support is in folded state, judge whether wind data satisfies unfolding condition;If it satisfies, then cumulative unfolding timing;If it does not satisfy, then clear zero unfolding timing;When unfolding timing reaches preset unfolding delay, control support to execute unfolding action and update current state to unfolded state;When support is in unfolded state, judge whether wind data satisfies folding condition;If it satisfies, then cumulative folding timing;If it does not satisfy, then clear zero folding timing;When folding timing reaches preset folding delay, control support to execute folding action and update current state to folded state.The application is through the delay judgment mechanism of "cumulative-clearing", ensure that only when wind condition continues to be stable and meet the requirements, trigger support action, effectively filter transient wind fluctuation, avoid the frequent misoperation caused by gust oscillation near critical wind speed.