In order to improve the effectiveness of coal mine gas control and enhance level safety production, application a microseismic monitoring system hydraulic fracturing technology in mines was studied. Applying treatment, firstly, geological structure concentration mining area are detected using radio tunnel perspective method infrared differential absorption method. Then, relevant parameters determined, finally, is implemented. Microseismic used monitor cracks formed during construction...

Abstract Deep learning‐based single view 3D reconstruction is a hot topic in computer vision. However, predicting more realistic point cloud from image an ill‐posed problem. In recent years, most of the prediction methods based on are straight‐through structure, which will cause loss part feature information and detail resulting clouds, lead to unsatisfactory visual effect reconstructed clouds. this paper, Feature‐Enhanced clouds generation Network (3D‐FENet) proposed. order enhance RGB...

In order to improve the geo-location accuracy of airborne optoelectronic platform and eliminate influence assembly systematic error on accuracy, a correction method is proposed. First, based kinematic characteristics platform, model was established. Then, items that affect were analyzed. The installation between POS considered, platform’s pitch azimuth introduced. After ignoring higher-order infinitesimals, least square form obtained. Therefore, can be obtained through series measurements....

This paper aims to create a unified model that effectively combines continuous 2-dimensional elements and discrete components capture the nonlinear characteristics failure mechanisms of solid perforated masonry infill panels. Given behavior is primarily influenced by shear deformations, an equivalent developed using multiple small square panels arranged diagonally interconnected two-component springs, encompassing axial at their intersections. For sake simplicity, divided are assumed behave...

In view of the inconsistency guided wave energy in distributed acoustic sensing coal mine maps and difficulty distinguishing vibration levels mines, which leads to poor sensitivity accuracy microseism detection, a detection method based on time–space characteristics support vector regression algorithm is proposed ensure safety operations. The spatiotemporal sliding window was used collect data real-time, continuous attribute discretization entropy discretize data, then were mapped different...

With the development of modern building design and construction technology, high strength concrete technology were getting more use in engineering requirements. The authors produced C80 HPC by using Portland cement, blast furnace slag, micro bead Flyash as cementitious material, have prepared with grade C80, low pumping resistance (rewinding time less than 6s), shrink (72h early self-shrinkage value at 0.028%), workability (slumps over 240mm divergence 700mm) durability (diffusion...

To improve the accuracy of debris flow forecasts and serve as disaster prevention mitigation, an accurate intelligent early warning method initiation based on IGWO-LSTM algorithm is proposed. First, entropy employed to screen indicators. Then, improved grey wolf (IGWO) obtained by optimizing combining elite reverse learning adaptive convergence factors. Finally, using IGWO total connection layer weight bias parameters LSTM, which takes screened indicators input outputs results formation risk...

To understand the wheel spin-up process of UAV main landing gear, this paper constructs simplified mechanical model. The bilinearity model is used to simulate relation between tire-runway adhesion coefficient and slip ratio. Some factor influenced resultant load analyzed. axle flange are analyzed with ABAQUS.

Abstract Certain types of rocket engine pipes can only be cut perpendicular to the axis when cutting margins. In order verify whether pipeline achieve margin by correcting bend angle, and finally perform accurate assembly, a verification method based on SolidWorks simulate pipe shaping process is proposed. First, model was reconstructed using measurement data. Second, lengths segments, angles between line segments adjacent surfaces were extracted. Third, simplified interface established...