Abstract: This paper focuses on soil pollution. It points out that soil is the fundamental resource for human survival and the construction of civilization, and its pollution problem is severe. It elaborates on the types of single soil pollution and combined soil pollution, emphasizes that combined pollution is the main form and causes huge harm. For example, the combined pollution of heavy metals and organic pollutants is common in various pollution sources, which can change soil microorganisms, affect plant growth and endanger human health. It also mentions the ecological risks of combined pollution at the food chain level and the related research technical means. Finally, it shows that soil combined pollution has become the main form, the ecological risk assessment based on the food chain or food web is more realistic, and the development of molecular technologies provides new methods for evaluating its ecological risks. Read More

Abstract: In this paper, 1850 literatures published in CNKI from 2001 to 2021 are selected as the research objects, and the progress and hot trends of urban heat island research in China in recent two decades are analyzed by using scientometrics and CiteSpace. The results show that; 1) Urban heat island research in China can be roughly divided into three stages, and the number of current literatures remains stable; 2) There are many research institutions but few publications, which are relatively independent and lack of trans-regional, trans-institutional and trans-field collaborative academic community; 3) The research focuses on the causes, research methods, temporal and spatial characteristics and influencing factors of urban heat island; 4) The research trend front focuses on the evaluation index of thermal environment, sponge city, landscape pattern and spatio-temporal pattern, and analyzes and prospects them. Through the analysis and sorting of the above contents, it is expected to provide beneficial enlightenment for the innovation and practical development of urban heat island theory in China. Read More

Abstract: In response to a series of safety and environmental issues caused by displacement and deformation of overlying rock layers during the mining process of mineral resources, the cellular space is constructed by combining three-dimensional laser scanning data and traditional observation station data. Based on the research of subsidence mechanism and prediction methods in subsidence areas, a spatiotemporal model based on extended cellular automata for dynamic simulation of mining subsidence is proposed with DEM and subsidence acceleration parameters as mandatory constraints, and verified with examples. Compared with traditional method based on monitoring point, the fine surface model can better reflect the spatial change characteristics of monitoring surface objects and is more suitable for prediction of mining subsidence. Read More

Abstract: At the present stage, satellite remote sensing images often have the problem of cloud obscuration, which causes difficulties in the subsequent image processing and further research. In this paper, using the Moderate Resolution Spectral Imager II (MERSI-II) data from the domestic Fengyun-3D satellite as the data source, we study how to use the threshold method to detect clouds on the obtained data, and use the multi-temporal image superposition method to produce clear-sky products according to the results of the cloud detection, to eliminate the problem of cloud occlusion, and restore the real information of the features. Comparing the obtained cloud detection products with the actual true-color images and the official cloud detection products of Fengyun Satellite, it is found that the effect is still good. At the same time, the production results of the clear sky products can also clearly see the real features and better realize the de-cloud operation. Read More

Abstract: Light pollution, resulting from artificial outdoor lighting, significantly impedes the visibility of celestial objects, posing challenges for both astronomical research and astrophotography. This study investigates light pollution across 40 of China's largest cities, focusing on its relationship with economic indicators, population density, and geographic factors. By combining city-level data on GDP, population, and altitude, we identify patterns in luminous flux that reveal optimal locations for stargazing and astrophotography. The analysis shows that cities with lower economic activity and higher altitudes generally experience reduced light pollution, with Urumqi and Guiyang emerging as the most favorable locations for astrophotography based on combined economic and geographic characteristics. Findings indicate that urban planning and policy measures can play a critical role in managing light pollution, thereby supporting clearer skies and promoting sustainable development. This research provides a framework for identifying low-pollution observation sites and contributes to broader efforts to preserve dark skies for future generations. Read More

Abstract: Coalbed methane (CBM) is one of the crucial energy sources in China. The swelling of clay mineral components in coal can lead to wellbore instability and reduced coal permeability, posing challenges during drilling operations. To address these issues, analyzing and detecting the mineral components in coal and selecting inhibitors for drilling fluids that can suppress the hydration and swelling of clay minerals are vital. X-ray diffraction (XRD) analysis is employed to determine the mineral composition of coal samples, providing data for reservoir evaluation. Furthermore, coal swelling experiments are conducted to select optimal inhibitors for drilling fluids. The results indicate that potassium chloride effectively inhibits the hydration and swelling of clay minerals in coal. When coal rocks are soaked in drilling fluid containing potassium chloride for 16 hours, the coal swelling rate remains below 0.3%. Therefore, potassium chloride can be used as a drilling fluid additive at drilling sites to enhance coal permeability and achieve efficient CBM extraction. Read More

Abstract: Carbon dioxide capture and storage (CCS) represents an effective approach for mitigating CO₂ emissions. However, the potential leakage of stored CO₂ poses significant risks to both the surrounding environment and human health, necessitating comprehensive risk assessment and management of CCS systems. This paper reviews the fundamental principles and applications of commonly employed methods for the risk assessment of CO₂ geological storage and provides insights into future development trends. Read More

Abstract: Soil degradation is one of the main challenges affecting the success of ecological restoration in mining areas. Mine soils often face issues such as nutrient depletion, acidification, and compaction, which hinder vegetation recovery and slow down the ecological restoration process. This paper reviews the basic composition of solid waste artificial substrates, compares the advantages and disadvantages of different types of solid waste and their applicable scopes, and discusses the application of solid waste artificial substrates in mine soil improvement. Furthermore, the development of solid waste artificial substrates is forecasted, aiming to provide solutions for the resource utilization of solid waste in mine ecological restoration. Read More

Abstract: Li Yu's Twelve Buildings is a chapter book from the Ming and Qing dynasties uctural element. The architectural originality of the buildings depicted in the text reflects the characteristics and development of garden architecture during that historical period. This study adopts a methodological approach that extracts garden architecture genes from the text of the novel using a landscape gene extraction method. The garden architecture genes are then categorised into three types: architectural genes, elemental genes, and plaque genes. The subsequent extraction of these three levels of existing garden architecture gene elements enables the creation of garden architecture gene mapping, facilitating the restoration of the design of the novel's Group-photo House scene. The gene map facilitates a more accurate and comprehensive reproduction of ancient garden architecture, thereby providing a method for the discovery of the characteristics of ancient Chinese garden architecture and the inheritance of garden culture. Read More

Abstract: Based on the geological conditions of 1033 working face in Yuandian No.1 Coal Mine, this paper studies the support distance and support strength of hydraulic support in the advanced section of roadway roof. Through numerical simulation analysis, the advance support range of the advance roadway is 5m, 10m, 15m, 20m and 25m four kinds of distance plastic zone and stress cloud diagram; at the same time, in-depth analysis of 0.4 MPa, 0.8 MPa, 1.2 MPa and 1.6 MPa of these  five different advanced hydraulic support support strength. Through the above research, it is concluded that the advance support distance of the working face is more suitable at 20 m, and the advance support strength is in the range of 0.8 MPa ~ 1.2 MPa. Read More

Abstract: In recent years, the ‘Qin Feng·The reed’ research in the main idea, word discernment, etc., from the garden point of view of the research is less and there are deficiencies. In this paper, from the garden elements to analyse the ‘Qin Feng·The reed’, to explore the meaning of its garden and the significance of modern garden construction. Analysis of ‘Qin Feng·The reed’ in the plants, water, terrain and other garden elements, to explore its plane, space, seasonal composition and mood creation, research on modern garden space layout, plant configuration and mood creation and other aspects of the revitalisation of the application. ‘Qin Feng·The reed’ contains rich garden aesthetic elements, for modern garden landscape revitalisation to provide inspiration, conducive to the inheritance of culture, promote the development of garden art, the future can be in-depth study of its relationship with the garden, integration of multidisciplinary knowledge innovation. Read More