With the advancement of blockchain technology, hundreds cryptocurrencies have been deployed. The bloom heterogeneous platforms brings a new emerging problem: typically, various blockchains are isolated systems, how to securely identify and/or transfer digital properties across blockchains? There three main kinds cross-chain approaches: sidechains/relays, notaries, and hashed time-lock contracts. Among them, notary-based solutions best compatibility user-friendliness, but they typically...

Terrestrial laser scanning (TLS) is an important technique for tree stem detection. In this paper, a point-based method detection proposed using single-scan TLS data. One of the main concerns point density, which decreases rapidly with increasing distance to scanner position. method, search radius generated adaptively, based on relationship between and make sure that neighborhood maintains similar scale corresponding density. The belonging each recognized cuckoo search-based support vector...

In this work, the electrochemical and discharge properties of Mg-Zn-

This letter proposes a novel approach using vector roads to aid in generating seams for aerial image mosaicking. A representative seam of two adjacent images is extracted as follows. First, the overlapping area are overlaid with straight skeleton build weighted graph G(V, E). Dijkstra's algorithm then applied And lowest cost path E) that connects intersections boundary polygons images. The considered candidate. Second, candidate refined by considering its surrounding pixels. employed final...

This paper proposes a novel method to reconstruct hierarchical 3D tree models from Mobile Laser Scanning (MLS) point clouds. Starting with neighborhood graph the clouds, treats root of as source and determines an initial skeleton by using Dijkstra algorithm. The lines are then optimized adjusting line connectivity branch nodes based on morphological characteristics tree. Finally, combined radius each node is estimated flat cones used simulate branches. A local triangulation connect gaps...

Point cloud classification is a crucial procedure in ground scene interpretation. In this letter, density-adaptive geometric features are proposed for the of terrestrial laser scanning data, with problem brought by point density variation as one main concerns. For each point, spacing estimated, respectively, based upon distance to scanner position and angular resolution, then used neighborhood scale basis generate search range optimal radius. feature extraction, we modify some common adapt...

This article proposes a novel approach for using vector roads the generation of seamline networks aerial image mosaicking. A representative is extracted as follows. First, straight skeleton overlapping area adjacent images extracted. Second, in regions are overlaid with to build weighted graph G and lowest-cost path considered candidate. Finally, candidate refined by considering its surrounding pixels. The employed final seamline. resultant seamlines commonly follow centerlines much possible...

Building boundary is of great significance for building reconstruction and digital mapping. The emergence airborne LIDAR technology makes rapid extraction buildings possible. Based on the analysis existing method, article proposes an automatic method extracting 3D boundaries directly from points cloud, which consists three steps: firstly, are segmented by a multi-resolution directional prediction filter roof then recognized series refinement procedure; Secondly, TIN mode built initial...

This paper proposes a new morphological shape representation algorithm that does not require searching. A theoretical analysis as well experimental results are presented to compare the with two leading schemes: skeleton transform (MST) and decomposition (MSD). Our combines advantages of MST MSD. In our scheme, binary is decomposed into union disks different sizes. The number used close by reconstruction cost

Accurate road information is important for applications involving maintenance, intelligent transportation, and network updates. Mobile laser scanning (MLS) can effectively extract information. However, accurately extracting edges based on large-scale data complex conditions, including both structural non-structural types, remains difficult. In this study, a robust method to automatically topological of points between adjacent scan lines auxiliary surfaces proposed. The extraction curb was...

We demonstrate a diode-pumped, air-cooled, 100 W class SiC-clad Nd:YVO(4) active slab laser based on diffusion bonding of two SiC plates to thin slab. obtained 83 cw output power with slope efficiency 27% without water cooling. This demonstration initiates novel (to the best our knowledge) cooling design for efficient removal waste heat generated from diode edge-pumped high-power at room temperature.

Airborne LiDAR point clouds have become important data sources for DEM generation recently; however the problem of low precision and efficiency in production still exists. This paper proposes a new technical scheme high-precision based on airborne systematically. Firstly, an elevation density analysis method is applied to filter out outliers. Secondly, ground points are detected by improved algorithm hierarchical smoothing method. Finally, feature lines extracted planar surface fitting...

Edge-detection of LIDAR depth-image is an important work for further image analysis. Based on the theory Canny algorithm, this paper discusses insufficiencies operator and proposes improved method. Instead using Gaussian smoothing filter, algorithm carries operation by adaptive median filter characteristics depth-image. As a result, it can not only eliminate noises effectively but also protect unclear edges. Gradient computation determination edge points are improved, gradient magnitudes...

With the advancement of science and technology, demand for high-performance materials has been increasing. Traditional metallurgical methods are unable to meet standards preparation materials, there is a growing need alloy powders. Magnesium alloy, as representative lightweight environmentally friendly alloys, widely used in aerospace, defense manufacturing, biomedical fields. Currently, production process magnesium-zinc powders complex expensive, necessitating exploration new processes...

Compared with Pidgeon process, the relative vacuum continuous magnesium smelting process reduces ratio of material to by changing raw materials and direct reduction after calcination prefabricated pellets, so that energy consumption per ton produced is reduced 30∼40%, carbon emission 43∼52%, breaking through conditions achieve production. However, in industrialization, it was found yield condenser low. Therefore, this paper constructs a model refining comprehensively analyzes condensation...