The Shuttle Radar Topography Mission (SRTM) provides for the first time a near-global high-resolution digital elevation model (DEM) with great advantages of homogeneous quality and free availability. last 10 years or so have seen rapid advances in data processing applications SRTM DEM. From perspective SRTM, we present this article brief overview principles, datasets, void filling accuracy DEM first. Special emphasis is on its application various research fields including, but not limited...

The present study conducted an extensive investigation into the durability of Na2SO4-activated binary slag cementitious materials for use in cemented paste backfill (CPB) under sulfate attack conditions. primary objectives were to assess feasibility employing a cost-effective and environmentally friendly binder CPB applications. Samples subjected exposure Na2SO4 MgSO4 solutions duration 30 weeks, multiple aspects including dimension stability, micro macro mechanical strength evolution,...

The accurate identification of dynamic load is important for the optimal design and fault diagnosis aeronautical structures. Aiming at loads on complex or unknown structures, a deep convolution neural network (CNN) in transform domain-based method proposed. It takes decomposed signals from wavelet several vibration as input. A CNN used feature extraction, fully connected layers are predicting domain. After synthesizing predicted components, time domain can be obtained. proposed could avoid...

Fiber reinforcement offers a promising solution to improve the mechanical performance and durability of cement-based foam backfill (CFB), addressing critical issues such as brittleness poor crack resistance under high-stress conditions. This study investigates effects polypropylene polyacrylonitrile fibers, at varying contents lengths, on flow properties CFB. A series experiments, including slump tests, rheology analysis, uniaxial compressive strength (UCS) pore structure scanning electron...

ABSTRACT Using a self‐developed supercritical carbon dioxide (CO 2 ) soaking system, the damage mechanisms and cracking characteristics of coal due to CO under coupling high‐temperature, high‐pressure, water, seepage evolution law failure mode bodies were revealed. On basis acoustic emission response physical experiments, model for body was established. The results show that (1) caused by has time effect nonuniform characteristics. compressive strength from 0 3 days (d) decreases sharply as...

Abstract The diagonal inerter is integrated into a suspension vibration reduction system (SVRS). dynamic model of the SVRS with and damping established. strong geometric nonlinearity. retaining non-linearity up to cubic terms validated under impact excitation. conditions omitting static deformation are determined. effects on performance explored random excitations. proposed both better than that either without them or only.

We have developed an alkaline barrier slurry (named FA/O slurry) for removal and evaluated its chemical mechanical planarization (CMP) performance through comparison with a commercially slurry. The consists of colloidal silica, which is complexing oxidizing agent, does not any inhibitors. It was found that the surface roughness copper blanket wafers polished by lower than commercial slurry, demonstrating it leads to better quality. In addition, dishing electrical tests also showed patterned...

Engineered cementitious composite (ECC) functional gradient concrete has a promising application future, and its mechanical features are piquing the interest of researchers. The impacts this strength class concrete, interface reinforcement technique, ECC thickness (i.e., fiber dosage), other factors on splitting tensile qualities explored using an experimental investigation concrete. tests 150 mm × specimens were used to explore link between grade, reinforcing with polyvinyl alcohol (PVA)...

The purpose of this paper is to study the different strain distributions CEAC (cement-emulsified asphalt concrete) pavement between macro- and meso-scale, using a three-dimensional macroscopic finite element ANSYS model composed hot mix (HMA), CEAC, stone mastic (SMA). Applying digital image processing technology, composition material at meso-scale identified as three-phase that includes cement-emulsified mastics, aggregates, air voids. A two-dimensional mesoscopic submodel measuring 80 × mm...

Dynamic load identification plays an important role in the field of fault diagnosis and structural modification design for aircraft. In conventional dynamic approaches, accurate modeling is usually needed, which difficult to obtain highly nonlinear or unknown structures. this paper, a one-dimensional convolution neural network with multiple modules proposed random Firstly, module designed temporal feature extraction. Secondly, extracted features are linearly weighted based on contributions...

Paste backfilling is an important support for the development of green mines and deep mining. It can effectively reduce a series risks underground goaf surface tailings ponds. Reasonable strength backfill effective guarantee controlling ground stress realizing safe mining function. Under combination complex materials local conditions, ensuring optimal design proportion paste bottleneck problem that restricts safety, economy, efficiency filling The developing trend prepared from waste rock...

Abstract Since the frequency response function is ill-conditioned at natural of system, traditional load identification method based on system parameters no longer applicable. Aiming difficulty dynamic structural a structure one-dimensional convolutional neural network(1D-CNN) with attention mechanism proposed. Specifically, high-level features in vibration signal are first extracted through convolution layer. Then weight matrix network updated by backpropagation algorithm, which represents...

Cemented paste backfill (CPB) can effectively eliminate the risk of dam break in goaf and tailings pond which used waste. Deep cone thickener (DCT) is an efficient machine for system preparation, concentration slurry at bottom high distributed unevenly, will cause too much partial resistance failure thickener. Focusing on above problems, fluidization design was conducted by using theory. The delivery law flocs analyzed, isobaric surface obtained. equation pressure critical velocity ideal...

The paper discusses the development of a berm breakwater revetment design for protection an artificial island on southern shore Sri Lanka. will primarily be constructed with excavated materials from Phase 2 Hambantota Port construction activities, which include considerable volumes slightly weathered rock. A value Engineering Study considered three different options protective revetment: two rock options, conventional rubble mound and breakwaters, option using Chinapode concrete armour...