A comparison of network model creation algorithms based on the quality of wayfinding results     

Jinwoo Park  Daniel W. Goldberg  Tracy Hammond 《Transactions in GIS》2020,24(3):602-622

Various network model creation algorithms have been introduced to demonstrate a better approximation of the actual walking pattern and to provide a better wayfinding guide. However, it is under‐investigated which algorithm creates the most appropriate indoor navigation network model in the context of wayfinding applications. Due to the lack of discussion, some studies unconsciously extended an algorithm designed for creating an outdoor navigation network model to indoor space applications. This is problematic because indoor space has different spatial contexts from outdoor space, such as non‐linear space and no‐designated walking space. Our solution is to select five well‐known algorithms that have been introduced, to reproduce the algorithm for the automated construction of the indoor navigation network model, and to evaluate the applicability of algorithms for indoor wayfinding applications. This article compares the quality of wayfinding results from the output of the indoor navigation network model against two criteria: route efficiency (i.e., length) and route simplicity (i.e., number of directions). Our statistical analysis illustrates that the visibility graph algorithm is the most appropriate for indoor wayfinding applications.  相似文献   

Estimates of Extragalactic Background and Confusion Noise Parameters for the Millimetron Telescope     

Ermash  A. A.  Pilipenko  S. V.  Lukash  V. N. 《Astronomy Letters》2020,46(5):298-311

Astronomy Letters - The sensitivity of future far-infrared telescopes, such as Millimetron, will be limited by the confusion noise produced by distant galaxies. We have constructed a model of the...  相似文献   

Quantifying sand delivery to deep water during changing sea-level: Numerical models from the Quaternary Brazos Icehouse continental margin     

Oriol Falivene  Bradford E. Prather  John Martin 《Basin Research》2020,32(6):1711-1733

Sequence stratigraphy for clastic continental margins predicts the development of sand-rich turbidite deposits during specific times in relation to base-level cycles. It is now widely understood that deltas can extend to the shelf-edge forced by high sediment flux and/or base level, providing a direct connection to transfer sediment and sand to the slope and basin floor even during high base level periods. Herein, we build a stratigraphic forward model for the last 120 kyr of the fluvio-deltaic to deep-water Brazos system (USA) where sediment partitioning along an Icehouse continental margin can be evaluated. The reduced-complexity stratigraphic forward model employs geologically constrained input parameters and mass balance. The modelled architecture is consistent with the location of depositional units previously mapped in the shelf. Sand bypasses the shelf and upper slope between 35 to 15 kyr before present and only about 20%–30% of all the sediment and sand supplied to the system is transferred to deep water. Several scenarios based on the initial Brazos model investigate the relationships between base level and deep-water sand ratio (DWSR). DWSR is defined as the relative amount of sand transferred to the deep-water portions of the system subdivided by the total sand input to the model. Linear correlations between DWSR and base level change rates or base level are very poor. Short-term variability due to local processes (for example avulsions) is superimposed to the long-term trends and mask the base level signal. DWSR for an entire base-level cycle is mainly controlled by the proportion of time the delta stays docked at the shelf-edge. Stratigraphic forward models are useful to complement field observations and quantify how different processes control stratigraphy, which is important for making predictions in areas with limited information.  相似文献   

Retrieving Sea Wave Spectra Based on High Resolution Satellite Imagery under Different Conditions of Wave Generation     

Bondur  V. G.  Vorobyev  V. E.  Murynin  A. B. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(9):887-897

Izvestiya, Atmospheric and Oceanic Physics - A method for retrieving sea wave spectra from space images of high spatial resolution has been developed for various conditions of wave generation based...  相似文献   

Plant Steroid Hormones As Unique Constituents of Devonian Oils of Belarus     

Garetsky  R. G.  Gribik  Ya. G.  Litvinovskaya  R. P.  Savchuk  A. L.  Mardosevich  M. A.  Khripach  V. A. 《Doklady Earth Sciences》2020,494(1):688-690

Doklady Earth Sciences - The content of plant hormones (brassinosteroids) in oil samples from a number of oilfields in Belarus is determined using an enzyme immunoassay method. Brassinosteroids of...  相似文献   

Content and Composition of Hydrocarbons in Water and Sediments in the Area of Kerch Strait     

Nemirovskaya  I. A.  Zavyalov  P. O.  Konovalov  B. V.  Khramtsova  A. V. 《Doklady Earth Sciences》2020,492(1):387-391

Doklady Earth Sciences - The results of studying the content and composition of aliphatic hydrocarbons (AHCs) and polycyclic aromatic hydrocarbons (PAHs) in the suspended particulate matter of the...  相似文献   

Geochemical Composition of Dolerites as an Indicator of the Distance of a Dike Swarm from the Mantle Plume Center (Case Study of Proterozoic Dike Swarms,Siberian Craton)     

Gladkochub  D. P.  Donskaya  T. V. 《Doklady Earth Sciences》2020,491(2):243-246

Doklady Earth Sciences - Based on investigation of Proterozoic mafic dike swarms of the Siberian Craton, we inferred how the geochemical and isotopic characteristics of dike swarms of dolerites of...  相似文献   

New Circulation Features in the Okhotsk Sea from a Numerical Model     

Fayman  P. A.  Prants  S. V.  Budyansky  M. V.  Uleysky  M. Yu. 《Izvestiya Atmospheric and Oceanic Physics》2020,56(6):618-631

Izvestiya, Atmospheric and Oceanic Physics - Using the eddy-permitting model, circulation in the Okhotsk Sea and in an adjacent area of the Pacific Ocean is retrospectively simulated from 1991 to...  相似文献   

Density Structure of the Lithosphere of the Sikhote-Alin Orogenic Belt     

Didenko  A. N.  Nosyrev  M. Yu. 《Doklady Earth Sciences》2020,492(2):446-450

Doklady Earth Sciences - For the first time, a detailed density 3D model of the lithosphere of the Sikhote-Alin orogenic belt to a depth of 130 km has been created. Two extended submeridional...  相似文献   

Restructuring of the Solar Magnetic Fields and Flare Activity Centers in Cycle 24     

A. V. Borovik  A. V. Mordvinov  E. M. Golubeva  A. A. Zhdanov 《Astronomy Reports》2020,64(6):540-546

The development of the solar magnetic activity in cycle 24 has been analyzed. It has been shown that the significant north–south asymmetry of magnetic activity was accompanied by the asynchronous reorganization of solar magnetic fields in the northern and southern hemispheres. The formation of unipolar magnetic regions after the decay of activity centers has been studied. The meridional transport of unipolar magnetic regions leading to changes in the zonal structure of the solar magnetic field has been shown. Long-lived centers of flare activity have been found to exist during the periods of magnetic field restructuring. The spatiotemporal analysis of the flare ensemble making it possible to diagnose non-stationary processes in the solar atmosphere has been shown.  相似文献