The influence of solid solution treatment (SST), artificial aging (AAT), and deep cryogenic-aging (DCAT) on the mechanical properties microstructure evolution 6082 aluminum alloy was investigated. tensile test performed to obtain true stress–strain curves through an electronic universal testing machine. results show that yield strengths SST specimens in all three directions are lowest, less than 200 MPa. In addition, maximum elongation specimen is over 16% value in-plane anisotropy (IPA)...

For fluid flow in fracture networks, the local water head loss will occur due to convergence or deflection at intersections, which obviously affect characteristics of networks. In this study, equations losses for intersections were derived based on work-energy principle. Then, nonuniform analyzed by numerical simulations and influences including velocities, rate distributions patterns studied. Finally, influence total networks was quantitatively. Through a unified relationship between index...

Purpose This paper aims to study the agent learning from expert demonstration data while incorporating reinforcement (RL), which enables break through limitations of and reduces dimensionality agent’s exploration space speed up training convergence rate. Design/methodology/approach Firstly, decay weight function is set in objective combine both types methods, RL imitation (IL) are considered guide agent's behavior when updating policy. Second, this designs a coupling utilization method...

Abstract Background Building biological networks with a certain function is challenge in systems biology. For the functionality of small (less than ten nodes) networks, most methods are implemented by exhausting all possible network topological spaces. This exhaustive approach difficult to scale large-scale networks. And regulatory relationships complex and often nonlinear or non-monotonic, which makes inference using linear models challenging. Results In this paper, we propose multi-layer...

Active flow control should be adopted at more than one critical position in highly loaded aspirated compressors due to the severe separation and obvious three-dimensional characteristics of field. A deep insight into mechanism simplified compound boundary layer suction a compressor cascade was experimentally numerically revealed this paper. Locations two slots studied schemes were determined through previous experimental investigations on single-slot schemes. Base one-side manner shared...

The pallet recognition method based on feature-to-feature laser scan matching is proposed. data are clustered into one line segment if they belong to object or adjacent objects; then the corner points found in segments; therefore, environment can be expressed by segments. segments compared with model recognize pallet. ratio and velocity of high fast. On our robot which configured Pentium III 400 MHz, 512 M RAM, static reach 100%; when moves, 98%; 100 frames per second.

ABSTRACT A magnetotelluric finite‐element modelling algorithm is developed, which capable of handling three‐dimensional conductive and magnetic anisotropic anomalies. Different from earlier methods, the we presented has taken anisotropy into consideration. The variational equations are produced by Galerkin method governing solved using a hexahedral vector edge method. accuracy this firstly validated comparing its solutions with results finite‐difference for arbitrary model, then analytical...

Relative Camera Pose Estimation (RCPE) aims to calculate the translation and rotation between two frames with overlapped regions, which is crucial computer vision robotics. This paper presents a novel siamese convolutional transformer model, SiTPose, regress relative camera pose directly. SiTPose distinguished in three aspects: (1) With cross-attention feature extractor compact encoder, extreme errors (> 150°) are significantly reduced: from 9.7‰ state-of-the-art 8-Points 1‱ on 7Scenes...

High-temperature oxidation tests were performed on pure iridium, rhodium, and the iridium alloys, IrRh10, IrRh25, IrRh40, at 1100 °C in a stable air environment for 60 h. The results of analyzed by X-ray photoelectron spectroscopy (XPS). Microstructural changes Ir-Rh alloys characterized scanning electron microscopy (SEM). XPS analysis show that main oxide alloy was Rh2O3, SEM shows surfaces after formed both linear ellipse-shaped corrosion pits, had same direction with wire-drawing process....

Pose estimation is playing the vital role in final approach phase of two spacecraft, one target spacecraft and other observation spacecraft. Traditional techniques are usually based on feature tracking, which will not work when sufficient features unavailable. To deal with this problem, we present a stereo camera-based pose method without tracking. First, vision used to reconstruct 2.5D 3D reconstruction presented by merged all point cloud each viewpoint. Then target-coordinate system built...

The aim of this research is to address the issues low precision in variable spraying within existing farmland application system, whereby nozzles cannot be controlled independently and pesticide utilisation observed. A system based on PTO protocol has been designed. comprises an STM32 microcontroller as control core, including host computer, multi-channel controller, electronic switch, electromagnetic spray nozzle. master unit receives amount set by user calculates duty cycle corresponding...

The marine magnetotelluric (MMT) method is a significant tool extensively utilized in offshore studies, including the understanding of Earth’s tectonics and hydrocarbon exploration. Conductive anisotropy non-zero magnetic susceptibility are common phenomena observed subsurface, MMT forward modeling basis practical inversion. However, numerical that incorporates both conductive has received limited attention. Moreover, accuracy efficiency crucial developing 3D algorithm. Therefore, we...

Automatic motion estimation of multiple depth cameras has remained a challenging topic in computer vision due to its reliance on the image correspondence problem. In this paper, spherical objects are employed estimate parameters between cameras. We move sphere several times common view fit point clouds get centers each camera system, and then introduce factorization based approach motions Both simulated real experiments show robustness effectiveness our method.

LiDAR placement and field of view selection play a role in detecting the relative position pose vehicles relocation maps based on high-precision map automatic navigation. When is obscured or misplaced, this can easily lead to loss repositioning low accuracy. In paper, method layout normal distribution transformation (NDT) proposed solve problem large NDT error when occlusion too large. To simulate real environment obstructed by obstacles, ROI algorithm used cut point clouds obtain cloud data...