Using the SWOT analysis framework, this study seeks to thoroughly evaluate tourism development potential of Malingshan Geopark in Linyi City, China. The geopark is distinguished by its unique geological formations, diverse natural scenery, and rich historical cultural heritage, making it highly promising for development. Nevertheless, park also encounters certain challenges limitations during Through an in-depth geopark's strengths, weaknesses, opportunities, threats, offers theoretical...

To study the effects of performance different types impeller on vortex pump, orthogonal test design, which is carried out by combining experimental and numerical calculation, adopted to optimize type design structure for in pump. find folding blade angle, position point whole blade, whether wedge an scheme with three factors two levels designed. A simulation conducted each analyzing curve plan optimal program data obtain primary secondary orders impact angle blades blades, shape blades. The...

Affected by global warming, the permafrost in Northeast China (NEC) has been continuously degrading recent years. Many researchers have focused on spatial and temporal distribution characteristics of NEC, however, few studies delved into field scale. In this study, based Optimal Parameters-based Geographical Detector (OPGD) model Receiver Operating Characteristic (ROC) test, stratified heterogeneity indicating performance environmental variables NEC at scale were analyzed. Permafrost data...

Abstract With global warming, the carbon pool in degradation zone of permafrost around Arctic will gradually be disturbed and may enter atmosphere form released methane gas, becoming an important factor environmental change areas. We selected northwestern section Xiao Xing'an Mountains China as study area, located on southern margin region Eurasia, set up multiple monitoring areas equipped with concentration sensors, air temperature pore water pressure sensors soil for long-term data changes...

Frozen soil is an important environmental factor in cold regions. Warming climate will increase the risk of permafrost thawing, i.e., accelerated carbon release, reduced super-frozen water, intensified desertification and destruction infrastructure. Based on MOD11A2 MYD11A2 products MODIS Terra/Aqua, distribution change surface frost number under influence normalized difference vegetation index forest canopy closure Northeast China from 2003 to 2019 were produced. From 2012 2015, area...

In this paper, a two-dimensional (2D) thermo-hydro-mechanical dynamic (THMD) coupling analysis in the presence of half-space medium is studied using Ezzat’s fractional order generalized theory thermoelasticity. Using normal mode (NMA), influence anisotropy thermal conduction coefficient, derivatives, and frequency on THMD response anisotropy, fully saturated, poroelastic subgrade then analyzed with time-harmonic load including mechanical source subjected to surface. The general relationships...

Climate warming leads to permafrost degradation and melting phase transition, resulting in an increasing number of landslides. This study uses the road segments area at intersection between Bei'an-Heihe Highway northwest section Lesser Khingan Range north China as area. By means geological survey combined with meteorological data, we analyzed impact climate change on landslide movement zone. Over a 60 year period, average annual temperature has increased by 3.2 °C, is severe. Loose soil...

Under the influence of climate change and human activities, southern boundary permafrost region in Northeast China, which is located at edge area Eurasia, has moved north, surface temperature increased, thickness frozen layer decreased. At present, there a lack classification standards or map thermal state that can reflect dynamic characteristics China. A vegetation impact factor consisting normalized difference index forest canopy closure was introduced into MODIS LST products, order to...

The hydrologic and thermal states of foundation soils have an important influence on subgrade stability in degrading permafrost regions. However, thawing settlement remains a problem the regions Northeast China, because there are few relevant research results this area, deformation mechanism caused by changes is not clear. Therefore, structure with large block stones as embankment filler was proposed to improve settlement, it has been successfully implemented road project (Yiershi–Chaiqiao...

Information about the distribution of coniferous forests holds significance for enhancing forestry efficiency and making informed policy decisions. Accurately identifying mapping can expedite achievement Sustainable Development Goal (SDG) 15, aimed at managing sustainably, combating desertification, halting reversing land degradation, biodiversity loss. However, traditional methods employed to identify map are costly labor-intensive, particularly in dealing with large-scale regions....

In cold regions, there is a close relationship between vegetation and the underlying permafrost. While protects permafrost, permafrost also provides necessary water, nutrients, physical support for vegetation. As most sensitive area of alpine to environmental changes, timberlines respond rapidly degradation. Based on data from meteorological stations remote sensing in Mount Wutai, distribution change surface frost numbers under influence Wutai 2001 2021 were produced. The results show that...

The permafrost in Northeast China is experiencing rapid degradation due to the influence of climate change and human activities, profoundly impacting local ecological environment engineering construction. Understanding spatiotemporal dynamics long-term this region crucial; however, systematic research on topic remains scarce. This study combines meteorological station data, MODIS land surface temperature (LST) datasets, borehole locations apply frost number (SFn) model. approach enables...

A one-dimensional generalized magnetothermoelastic problem of a thermoelastic rod with finite length is investigated in the context fractional order thermoelasticity. The variable properties, which are temperature-dependent, fixed at both ends and placed an initial magnetic field, subjected to moving heat source along axial direction. governing equations thermoelasticity formulated solved by means Laplace transform tandem its numerical inversion. distributions nondimensional temperature,...

Abstract Installing an inducer upstream of the main impeller is effective approach for improving performances a centrifugal pump. In order to study influence on internal flow characteristics and evolution vortex pump, numerical simulation experimental test 150WX-200-20 pump have been done by principle computational fluid dynamics, acquire performance structure change with without inducer. Based these, energy conversion combined changes through-flow circulating-flow structure. Through...

The main objective of this study was to investigate the potential using Support Vector Machines (SVM) and Random forest (RF) estimate above ground biomass (FAGB) by multi-source remote sensing data. To do so, we introduced a basic flow SVM FAGB from multisource RF method adept at identifying relevant features having effects in Results show that: (i) In stage feature selection, Forest model provide better results compared typical F-scores method. (ii) optimal model, based on selection clearly...