6results about How to "Improve space coverage" patented technology

The application belongs to the technical field of reaction kettles, and particularly relates to a vertical stainless steel reaction kettle, which comprises a kettle body, a separation cover fixedly connected to the top of the inner side of the kettle body, a sliding connection hole formed in the bottom of the separation cover, a first sealing ring clamped on the inner wall of the sliding connection hole, a stirring shaft slidably connected to the sliding connection hole through the first sealing ring, and a transmission groove formed in the top end of the stirring shaft; a driving device is installed on the top of the kettle body, a driving shaft is fixedly connected to the output shaft of the driving device, a spline is arranged on the shaft surface of the driving shaft, and the driving shaft is slidably connected to the transmission groove through the spline; in the application, the downward guiding of the material by the first spiral blade and the upward pushing of the bottom material by the inclined paddle blade are combined with the lifting movement of the stirring shaft driven by the hydraulic cylinder and the first spring to realize the up-and-down convection circulation of the material in the kettle body, effectively prevent the deposition, eliminate the stirring dead zone, and improve the space coverage capacity of the first spiral blade.

The invention discloses a TVOC emission remote sensing monitoring method based on multi-source data driving, and the method comprises the following steps: analyzing related environmental factor data affecting TVOC emission according to the total concentration of TVOC measured on the ground in combination with various environmental factors; estimating and fitting an atmospheric methane vertical profile, and calculating a ratio of the surface methane concentration to the whole column methane concentration; establishing a TVOC emission model by using a Gaussian process regression algorithm by acquiring and matching each parameter; and measuring and calculating the TVOC emission amount of each grid in the monitoring range by using the model to obtain TVOC emission data fully covered by the monitoring area. The beneficial effects of the invention are that the method can obtain a high daily temporal-spatial resolution, greatly improves the spatial coverage of VOC emission data, meets the demands of regional refined monitoring, reduces the consumption of computing resources, improves the computing efficiency, can rapidly obtain the VOC emission data, and improves the reliability of the VOC emission data. The cost is greatly reduced; and the production efficiency is improved.

According to the high-isolation antenna array based on the MEMS technology and the preparation method, the characteristic of high processing precision of the silicon-based MEMS technology is utilized, the size of the antenna array is accurately controlled, the performance consistency in the W wave band is ensured, the loss caused by processing errors is effectively reduced, the radiation efficiency and the gain stability of the antenna are improved, and the antenna array is suitable for large-scale popularization and application. The formed antenna array is miniaturized and high in integration level, batch production is facilitated, production cost is reduced, a shielding cavity formed by the third TSV columns and an isolation structure formed by the first TSV columns and the second TSV columns are designed, space coupling of signals in the transmission process from a radio frequency signal line to a feed probe is effectively restrained, and the antenna array is more compact in structure and more compact in structure. The antenna array isolation degree is improved, the performance of the antenna is remarkably improved, the performance deterioration caused by array pattern distortion and cross coupling change during large-angle beam scanning is effectively reduced by optimizing the antenna array layout and the low cross coupling design, a wider scanning angle range is supported, and the space coverage capacity of the antenna array is improved.

The application provides a kind of spaceborne conical scanning Doppler radar three-dimensional wind field inversion method and device, the method comprises: the radar observation strip area is divided into multiple sub-blocks, and there is area overlap between adjacent sub-blocks, and the horizontal wind field of each height layer is parameterized in each sub-block with piecewise continuity variation assumption;Variational method is used to obtain the optimal horizontal wind field parameter of each height layer in each sub-block, and the horizontal wind field in each sub-block is determined according to the optimal horizontal wind field parameter, the horizontal wind field of the corresponding position of each sub-block in the overlapping area is linearly weighted and fused to obtain the final horizontal wind field;The horizontal divergence is calculated according to the optimal horizontal wind field parameter of each height layer in each sub-block, and the vertical wind field is obtained by integrating the horizontal divergence in the height direction using the atmospheric mass conservation equation, and the vertical wind field of the corresponding position of each sub-block in the overlapping area is linearly weighted and fused to obtain the final vertical wind field.The application realizes the continuous and robust three-dimensional wind field inversion of spaceborne conical scanning Doppler radar.

This invention relates to the field of coal mine microseismic monitoring technology, and provides a method for evaluating the stability of coal seam roof based on DAS microseismic monitoring. The method includes: S1: fiber optic cable deployment and data acquisition; S2: dividing the raw strain rate data into two parts: one part is used to extract low-frequency strain data (LF-DAS) through low-pass filtering; the other part is used to generate velocity data through velocity conversion; S3: microseismic event detection and candidate event screening; S4: first arrival picking and event quality control; S5: microseismic event location based on arrival time difference; S6: microseismic event attribute extraction; S7: borehole-fiber optic cable coupling quality evaluation; S8: roof stability feature construction; S9: roof stability risk index construction and classification evaluation; S10: roof risk deterioration trend determination and early warning output. This invention uses the strain rate data output by the DAS demodulator as a basis, constructs a dual-branch processing flow, and combines coupling quality correction and multi-index fusion evaluation to achieve quantitative evaluation and classification of the risk of roof failure in coal mining face roadways.

The invention provides an unorganized emission online monitoring method and system based on edge calculation, and relates to the technical field of environment monitoring, and the method comprises the steps: obtaining emission feature data of distributed sensing nodes, building an inter-node adjacency relation, carrying out the space-time dimension feature extraction, determining an abnormal score, and carrying out the detection of the abnormal score; and an emission source candidate position is searched based on actually measured concentration distribution and an emission state evaluation result, high and low frequency components are extracted through wavelet decomposition to analyze emission characteristics, an influence range boundary is determined in combination with meteorological parameters, and an emission early warning signal and a traceability positioning result are generated. Accurate monitoring, traceability positioning and early warning of unorganized emission are realized, and the environmental monitoring efficiency is improved.