Slopes in geotechnical and mining engineering are the most crucial geo-structure. Predicting or forecasting the stability or instability of the slope and then classifying the slope accordingly helps in mitigating the risks and enhancing the design by maximizing the safety. Computing techniques have overpowered the analytical and statistical models used for predicting the stability of the slopes. To reduce the uncertainties and ambiguity of the previously used models, lately, researchers have come up with the novel techniques for Slope Stability Classification (SSC) which are Random Forest, Gradient Boosting Machine, Extreme Gradient Boosting, Boosted Trees and Classification and Regression Trees. These computational algorithms are employed in this research paper and the slope details are taken from a literature i.e. 221 input datasets are used and slopes are classified accordingly using the mentioned models. The relation between the inputs such as height (H), slope angle (β), cohesion (c), pore water pressure ratio (ru), unit weight (γ), angle of internal friction (φ) and slope stability (output) is established and slopes are categorized according to their failure and stability. Performance analysis is done thereafter to analyses and compare different models and let the readers and researchers know that which model sufficed and fitted best to the study.
Increasing concern for biodiversity conservation at species level resulted in the development of cost effective tools for
getting information at larger scale. Modeling distribution of species using remote sensing and geographic information has
already proved its potentials to get such information with less effort. Pittosporum eriocarpum Royle is an endemic and threatened tree species of Uttarakhand, yet till now its regional distribution is poorly known. This
study using geospatial modelling tools indentified several localities of potential occurrence of this species in the Mussoorie
hills and Doon valley, and also provides information on its habitat specificity. The main objective of the study is to predict
the suitable habitats for endangered plant species in Himalayan region using logistic regression model where availability
of sufficient data on species presenceabsence is a major limitation for larger areas. 相似文献
Remote sensing techniques have proved to be highly efficient in the exploration of Mars. Availability of several sensors operating across the electromagnetic spectrum on-board orbiters, landers and rovers has helped better understand the surface and atmospheric conditions on the Red planet. This article summarises the application potential of the sensors operating in different wavelength regions for Martian surface studies. Mars unlike Earth allows for utilizing remote sensing techniques in the complete thermal infrared region, owing to narrow absorption regions from a singularly dominant CO2 atmosphere which facilitate detailed lithological mapping. This work also reviews various methodologies adopted till date to study the lithology, mineralogy and fluvial geomorphology including inferences from Syrtis Major volcanic construct. It is evident from the studies, Syrtis Major has well developed fluvial channels mostly attributed to lava flows. However, spectroscopic studies reveal the presence of hydroxylated and hydrated minerals which indicate that lava might not be the sole factor resulting in channel generation in the construct. Future space missions with high resolution payloads targeting this volcanic construct are indispensable to study these channels in detail. 相似文献
The potable water for the residents of the town of Kolasib in Mizoram state, India, is supplied by the Public Health Engineering
Department (PHED) of the Government of Mizoram without any notable treatment. The source of water is the Tuichhuahen River,
flowing from north to south in the area. Water samples were analyzed for their physicochemical and bacteriological characteristics
in order to obtain the current quality level of the potable water in the twon. The samples were collected from two different
sources, i.e., the supply from the government agency (PHED) and from the naturally occurring springs (tuikhurs). The results
suggest that the water supplied by the PHED is better than that from the tuikhurs; however, the quality of water from both
sources, which are used for drinking and domestic purposes, were found to be more or less within the tolerance limits. 相似文献
We present spectropolarimetric analysis of umbral dots and a light bridge fragment that show dark lanes in G -band images. Umbral dots show upflow as well as associated positive Stokes V area asymmetry in their central parts. Larger umbral dots show downflow patches in their surrounding parts that are associated with negative Stokes V area asymmetry. Umbral dots show weaker magnetic field in central part and higher magnetic field in peripheral area. Umbral fine structures are much better visible in total circularly polarized light than in continuum intensity. Umbral dots show a temperature deficit above dark lanes. The magnetic field inclination shows a cusp structure above umbral dots and a light bridge fragment. We compare our observational findings with 3D magnetohydrodynamic simulations. 相似文献
The proliferation of mobile devices and the emergence of wireless location-based services has generated consumer demand for
availability of GPS in urban and indoor environments. This demand calls for enhanced GPS algorithms that accommodate high
degrees of signal attenuation and multipath effects unique to the "urban channel." This paper overviews the market for location-based
services and discusses algorithmic innovations that address challenges posed by urban environments.
Electronic Publication 相似文献