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Key technologies of efficient extraction of coalbed methane (gas) in Guizhou coal mine area
Published 2025-03-01“…It innovated and explored the following high efficiency extraction technology of “four zones” linked Wells in coal mining areas with Guizhou characteristics: ① By laying multi-functional pumping vertical Wells or small inclination oriented Wells in the goaf, it was the first time in Guizhou to realize efficient extraction and development of pressure relief gas in the overlying coal-covered strata and coal-bed methane in the sweet coal seam below the goaf; ② Taking advantage of the characteristics of spatial and temporal dislocation in the production area, the multi-mode extraction mode of “coalbed methane well + relief well + underground drilling” is adopted for the first coal seam mined in the upper protective layer, which realizes the purpose of the upper and lower vertical combined extraction of coalbed methane (gas) Wells and effectively solves the problem of multi-source gas flooding into coal mining roadway and gas accumulation in the upper corner during coal mining under the condition of coal seam group development in Guizhou; ③ In the preparation area and planning area, combined with the terrain and geological characteristics of the two areas, the horizontal well “well factory” + “two pairs of right and wrong” overlapping well layout mode is adopted to realize the efficient extraction of coal bed methane in the plane in advance and pre-pumping of the sweet coal seam and the pressure relief gas in the overlying coal-laden rock in the subsequent mining process, and at the same time to achieve the goal of “replacing the roadway with Wells”; ④ In view of the development of multi-thin coal seam groups in the study area and the development characteristics of “three zones” in the overlying strata after mining, due to the continuous change of the role of “four zones”, the surface coalbed methane Wells are initially deployed in the production area or preparation area, and the “bridge plug bottom sealing + layer selection perforation” technology is adopted to innovate the “transformation” technology of well structure to achieve the purpose of “multi-purpose in one well”; It also provides new technical ideas and accumulated valuable engineering experience for gas management in coal mine area under the condition of multi-thin coal seam group development in Guizhou.…”
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143
A Multi-Criteria Decision-Making Approach for Sustainable Energy Prioritization
Published 2022-02-01“…Iran’s economy is highly dependent on energy exports and applying renewable energy (RE) resources is vital to optimize consumption function. …”
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Sustainable forest management: success and challenges in Ethiopia
Published 2025-05-01“…Forest governance encompasses the norms, institutions, and processes that determine how power and responsibilities over forest resources are exercised, how decisions are made, and how forest dwellers participate in and benefit from the management of these resources4. …”
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147
Phonological and Sociolinguistic Challenges of Translating Yorùbá Play, and Game Songs to Singable English for Children
Published 2022-07-01“…Consequently, the translations are “unperformable” as oral texts, thus, failing their aesthetic and functional purpose for children. To investigate the translation problems involved and proffer solutions, this essay analyses five randomly selected Yoruba songs and seven of their available English translations from online sources and an unpublished manuscript, using sociolinguistic translation theory and the analytical framework of Franzon’s song translation choices. …”
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Oil, Metal, and Agricultural Raw Material Prices in Global Markets and the Iranian Economy
Published 2025-03-01“…Moreover, since oil revenues are higher than other revenue sources, the inflationary effects of oil could be stronger. …”
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RABP: Delay/disruption tolerant network routing and buffer management algorithm based on weight
Published 2018-03-01“…This algorithm estimates the message delay and hop count to the destination node in order to construct a weight function of the delay and hop count. A node with the least weight value will be selected as the relay node, and the algorithm implements buffer management based on the weight of the message carried by the node, for efficiently utilizing the limited network resources. …”
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151
State of accounting methods and cost of maintenance and improving water management facilities
Published 2016-12-01“…The author conducts the survey of the Basin Management of Water Resources in Ukraine on accounting organization. The researcher finds out that the accounting cost of maintaining and improving water management facilities depends on the sources of financing of such costs as general or special funds of budget institutions. …”
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152
German Colonists of Northwest Russia in Conditions of Post-Revolutionary Reality (1918-1922)
Published 2023-09-01“…The condition and functioning of German farms largely depended on the extraordinary revolutionary economic measures carried out by the Bolsheviks within the framework of equalizing land use and “war communism”, where the German village was considered as an easily accessible and high-performance source of agricultural resources for the Red Army and the urban population, which resulted in an excessively high economic burden on the colonies and a selective approach to accounting for national the specifics of the economic life of the Germans and their current economic opportunities. …”
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Research and application of image recognition-based identification for flesh browning of loquat fruits
Published 2025-02-01“…Additionally, the MATLAB ROI function was used to select the irregular representative loquat flesh browning areas, extract the color feature value, and complete the browning area segmentation of the original image by using the Euclidean distance. …”
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Effects of intercropping potato with maize on soil and crop
Published 2017-01-01“…The crop yields in the intercropping system obviously have the correlationship between the crop species and species characteristics.It is concluded that rational intercropping contribute to increase soil bacteria population, enrich soil microbial community structure and enhance the ability of microbial community function diversity and the ability of carbon source utilization. …”
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“Locality – Adaptation” Research of Hydropower Resettlement Communities in the Jinsha River Basin: A Case Study of Ludila Hydropower Station
Published 2025-04-01“…At the settlement scale, the Mask Region-based Convolutional Neural Network (Mask R-CNN) deep learning model is utilized to identify architectural spatial features, categorizing three typical building types: traditional pitched-roof buildings, uniformly planned flat-roof buildings, and color steel plate-modified structures. Through multi-source data fusion (including remote sensing, demographic statistics, and compensation records) and field investigations, the research quantitatively analyzes the “locality – adaptation” reconstruction process of resettlement communities across the three spatial dimensions of living, production, and cultural spaces.Results1) Land cover evolution: Water storage of hydropower station inundates 37.12 km2 of land (including 21.61 km² of high-quality cultivated land), resulting in a loss of 43.68% of settlement production space. 2) Adjustment of architectural space: 65.8% of dwellings in the original villages are traditional timber-earth buildings with a tile roof, which adapt to the climate environment of concentrated rainfall and sufficient sunshine in the Jinsha River Basin. 48.7% of the resettlement sites adopt unified flat roof planning, and 51.3% realize functional optimization through self-construction or renovation, with the average renovation area reaching 230.9 m2. 3) Transformation of livelihood system: The annual compensation mechanism only restores 15.79% of the cultivated land allocation before resettlement, and the proportion of compensation income drops from 82.71% in the initial stage of relocation to 33.15% after long-term resettlement, driving the adjustment of crop structure to high value-added cash crops. 4) Cultural space reconstruction: In the context of the disappearance of traditional water transport functions, the three cultural relics reconstructed in different places show a symbolic turn. …”
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Investigating the relationship between the monetary policy shock through the exchange rate channel on the management quality index in the banking system: by examining the productiv...
Published 2025-03-01“…One of the most important indicators that can be used to attract bank resources and assess how to use resources (optimal allocation of resources) and incomes, is the productivity index in the discussion of management quality. …”
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Multi-omics analyses reveal fecal microbial community and metabolic alterations in finishing cattle fed probiotics-fermented distiller’s grains diets
Published 2025-05-01“…These findings provide some new insights into clarifying the role and potential mechanisms of FDG diets and also offer a scientific basis for the development of FDG into functional feed resources.…”
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Energy Efficiency of Using Hybrid Heating Points in Conditions of Integration of Electrical and Thermal Networks of Urban Neighborhoods. Part 1. Justification of the Feasibility of...
Published 2023-12-01“…The paper discusses the circumstances and technical solutions that contribute to the integration of electrical and thermal networks of urban neighborhoods within the framework of a surplus of electricity generating capacities arising from the imbalance in the development of energy generation and consumption, stochastic processes of market economy development, the transfer of energy-intensive industrial production to other countries, the desire to diversify fuel energy resources, passion for the construction of energy sources for alternative energy resources in counterbalance to traditional energy facilities without taking into account all aspects of the interaction of the former with the environment, etc. …”
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Analysis of ecotourism components effect on designing Talesh city residential-recreational complex
Published 2021-02-01“…Sampling in this citation is purposeful-selective through in-depth interviews with a statistical population of 20 architects. …”
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