In this paper, we develop the theory of probabilistic relaxation for matching features extracted from 2D images, derive as limiting cases various heuristic formulae used by researchers in problems, and state conditions under which they apply, We successfully apply our to problem recognizing aerial road network images based on models edge a stereo pair. For purpose, each line is represented an attributed relational graph where node straight segment characterized certain attributes related...

Central to the development of a successful waste sorting robot lies an accurate and fast object detection system. This study assesses performance most representative deep-learning models for real-time localisation classification Construction Demolition Waste (CDW). For investigation, both single-stage (SSD, YOLO) two-stage (Faster-RCNN) detector architectures coupled with various backbone feature extractors (ResNet, MobileNetV2, efficientDet) were considered. A total 18 variable depth...

We present an algorithm for separating the local gradient information and Lambertian color by using 4-source photometric stereo in presence of highlights shadows. assume that surface reflectance can be approximated sum a specular component. The conventional method is generalized images. Shadows input images are detected either spectral or directional cues excluded from recovery process, thus giving more reliable estimates parameters.

This paper describes an approach to perceptual segmentation of color image textures. A multiscale representation the texture image, generated by a multiband smoothing algorithm based on human psychophysical measurements appearance is used as input. Initial achieved applying clustering at coarsest level smoothing. The segmented clusters are then restructured in order isolate core clusters, i.e., patches which pixels definitely associated with same region. representing form 3D histograms for...

This paper reports an experimental study on the thermal stability and mechanical performance of geopolymers developed entirely with construction demolition waste precursors, either bricks or ceramic tiles, upon their firing at temperatures between 600 1050 οC. The brick- tile-based were prepared solid to liquid ratios 2.4 3.4, respectively, using combined aqueous solutions potassium hydroxide (KOH) sodium silicate (Na2SiO3), as alkali activator. After curing for 7 days 50 οC hardening 28...

The mechanical behavior of materials based on the alkali activation construction and demolition waste during after their exposure to high temperatures was studied. studied were entirely either, bricks or ceramic tiles, while a potassium hydroxide / sodium silicate solution used as activator. compressive deformation activated tested 850 - 1050 °C (on-fire testing) residual strength measured 600 for 2 h (post-fire testing), simulating standard ISO 834 time-temperature curve. Microstructural...

This study examines the effects of one-dimensional fiber-reinforced polymer (FRP) composite rehabilitation systems on flexural fatigue performance reinforced concrete bridge girders. Eight 508mm deep and 5.6m long T-beams, with without bonded FRP reinforcement their tensile surfaces, were tested a concentrated load at midspan under constant amplitude cyclic loading. The objective this investigation is to establish effect that these repair have behavior remaining life Results indicate such...

The objective of the presented study is to examine effects glass fiber reinforced polymer (GFRP) composite rehabilitation systems on fatigue performance concrete beams. Experiments were conducted beams with and without GFRP sheets their tensile surfaces. specimens 152 × 1,321 mm enough transverse reinforcement avoid shear failure. results this indicate that life given geometry, subjected same cycling load, can be significantly extended through use externally bonded sheets. An interesting...

This research assesses the effects of presence water during carbon fiber reinforced polymer (CFRP) application and after CFRP cure on bond between concrete. Modified double cantilever beam (MDCB) specimens are used to determine interfacial energy release rate, G, CFRP—concrete bond. A fabric is applied with three different initial levels water/moisture presence. Other specimens, a in dry conditions allowed cure, conditioned saturated environment for lengths time. The test results indicate...

The increasing use of innovative materials in blast- and impact-resistant structures underscores the demand for robust simulation design methods. Concrete, especially Ultra High Performance Fiber Reinforced Concrete (UHPFRC), has emerged as a key player this domain. present study delves into damage investigation dynamic response assessment blast loaded UHPFRC panels with optimized mixture (microsilica content, water curing conditions, fibre proportions). so-assembled material is calibrated...

The majority of experimental work involving the flexural retrofit concrete bridge girders has been conducted on beam specimens with adhesive-applied, soffit-mounted, fiber-reinforced polymer (FRP) composite systems, referred to in this study as conventional adhesive application (CAA). It observed that performance such is often controlled by quality bond between FRP and substrate substrate's ability transfer stress from steel FRP. With goal improving bonded mind, two additional soffit-mounted...

An experimental study is presented of the behavior eight reinforced concrete bridge girders taken from a decommissioned Interstate and retrofitted with three different carbon-fiber-reinforced polymer (CFRP) systems. Specimens were subjected to monotonic loading failure without significant fatigue conditioning. Experimental observations indicated that intermediate crack-induced debonding was dominant mode for monotonically loaded beams degradation CFRP-to-concrete interface caused by...

The scope of this paper is to investigate the performance ultra-high fiber reinforced concrete (UHPFRC) slabs, under projectile impact. Mixture impact loading was examined using bullets with 7.62 mm diameter and initial velocity 800 m/s. UHPFRC, used in study, consists a combination steel fibers two lengths: 6 13 same 0.16 mm. Six composition mixtures were tested, four one (UHPC), without fibers, high strength (HSC). Slabs thicknesses 15, 30, 50, 70 produced subjected real shotgun fire...

Recycle concrete aggregates (RCA) consist of natural and remnant mortar adhered to their surface. The amount, size, morphology the adherent remainder paste influences quality aspects RCA, such as bonding potential with new cement matrix in an RCA-based concrete, well concrete’s overall rheological performance characteristics. objective this research was study effect reducing by means a mechanical treatment method, on containing RCA at different percentages. process conducted within mixer...

A novel experimental method using modified double cantilever beam specimens and a customized test frame are introduced to evaluate bond characteristics toughness of fiber reinforced polymer (FRP) composite overlays concrete substrate under mixed mode loading. computer vision system is used measure the crack location, near-tip deformations opening displacement during growth process. Digital image correlation determine (COD) for flaws growing in vicinity FRP–concrete interface. Results from...

In this, paper general solutions for nonlinear non-negative component analysis data representation and recognition are proposed. Motivated by a combination of the matrix factorization (NMF) algorithm kernel theory, which has lead to recently proposed NMF in polynomial feature space, we propose framework where one can build method using kernels, so-called projected gradient (PGKNMF). approach, arbitrary positive definite kernels be adopted while at same time it is ensured that limit point...