Abstract: This paper explores how urban squirrels can be used as indicators of various urban conditions from the perspective of small squirrels. Squirrels are adorable wild animals, and their habits and survival methods are essential for humans to live in harmony with them. Scientific studies have shown that urban squirrels can reflect the quality of the urban ecological environment, the health of the ecosystem, the state of environmental pollution, climate change, and the harmonious coexistence of man and nature. Squirrels need suitable habitats, adequate food and water, and their behaviour and habits can provide a wealth of information about the health of urban ecosystems. In addition, squirrels are very sensitive to environmental pollution, and their health status and behavioral changes can be used as early warning signs of urban environmental pollution. By observing the squirrel's reproductive cycle and food storage behavior, we can also understand the impact of climate change on urban ecosystems. Read More

Abstract: Habitat quality is an important manifestation of the service functions and biodiversity in an ecological service system. Hilly areas have complex terrain and sensitive and diverse ecological environment characteristics. This study describes the spatiotemporal evolution of habitat quality in the Changsha-Zhuzhou-Xiangtan urban cluster from 2010 to 2020 based on the InVEST model, and explores its spatial differentiation and change characteristics under different topographic gradients. The results show that the habitat quality in the Changsha-Zhuzhou-Xiangtan urban cluster is showing a downward trend, with a spatial pattern of ‘middle loss and high, surrounding loss low’, and has obvious spatial cluster characteristics. The habitat quality in areas with a topographic gradient of 1 is the worst, while the habitat quality in areas with a topographic gradient of 5 is the best. The habitat quality and topographic gradient show a positive growth trend. Based on the investigation of the spatio-temporal evolution characteristics of the habitat quality in the Changsha-Zhuzhou-Xiangtan urban cluster and the effect of topographic gradient, it provides a theoretical basis and scientific basis for the protection of ecological space and the optimization of the spatial structure of land use in hilly areas, which is of great significance for promoting the sustainable ecological development of hilly urban clusters. Read More

Abstract: A mathematical model is established based on the equation of conservation of mass, energy and momentum to study the spatial distribution law of reservoir properties such as permeability and water saturation. The effects of different pressure reduction amplitude, initial absolute permeability and water saturation on mining efficiency are analyzed to determine the parameter sensitivity. The simulation results show that the appropriate pressure drop amplitude and lower water saturation can help to improve the gas release efficiency. Meanwhile, the spatial distribution of reservoir physical properties is demonstrated by three-dimensional visualization technology, which provides an important reference for optimizing the extraction strategy. The results of natural gas hydrate extraction technology based on numerical simulation provide a scientific basis for the efficient extraction of natural gas hydrate and promote the development of related technology. Read More

Abstract: China is in the stage of rising water content in crude oil reservoirs, and the water content, temperature and pressure of the oil layer will have a significant impact on the efficiency of crude oil extraction. After adopting the layered injection technology, the contradiction between layers has been improved to a certain extent, but there are differences in the permeability of each oil layer, and the water injected into the oil layer with better permeability is single-layer surging, which leads to the increase of water content of the extracted fluid. Aiming at this problem, this study is devoted to designing a set of digital oil reservoir monitoring device, which can detect and analyze the water content, temperature and pressure parameters of each reservoir in real time, and then carry out systematic exploitation for different oil reservoir states. Through model simulation, hardware design, software development, and sensor production and improvement, a complete downhole oil formation structure model is built to simulate the real oil extraction process. The device utilizes electromagnetic conductivity method to design and produce a highly reliable water content sensor, combined with temperature and pressure sensors and filtering algorithms for parameter compensation, the measured data are collected and processed by microcontroller, and the interaction between microcontroller and host computer software is established by serial communication. PC adopts VOFA+ host computer to build a complete set of simulated oil extraction system with hand-automated integrated control and display interface. Read More

Abstract: With the acceleration of economic development and urbanisation, the amount of waste in cities around the world has surged, and Hefei City is also facing pressure on waste management. Between 2018 and 2024, Hefei City has achieved remarkable results by promoting the policy of residential waste classification through three phases, including policy initiation, deepening promotion and consolidation and optimisation. However, there are still problems such as low awareness of residents' classification, insufficient facilities, outdated technology and ineffective supervision. For this reason, it is recommended to strengthen publicity and education, improve facilities, enhance technology, strengthen supervision and promote multi-party co-operation. By optimising the measures, it will promote the in-depth development of waste classification and management in Hefei, improve resource utilisation and promote the development of the circular economy. Read More

Abstract: Unmanned smart farmland is an advanced stage of agricultural production, which integrates emerging technologies such as the Internet of Things, cloud computing, big data, 5G, artificial intelligence equipment and robots. It relies on the smart agricultural production system deployed on the agricultural production site to achieve full automatic control of facilities, equipment, machinery, etc. or autonomous control of robots, realizing intelligent perception, intelligent warning, intelligent decision-making, intelligent analysis, and expert online guidance of the agricultural production environment. It is a 24/7, full process, and full space unmanned production operation mode, essentially realizing machine replacement in agricultural production. Building unmanned smart farmland is an important way to alleviate the shortage of rural labor and promote the modernization of agriculture and rural areas. It provides precise planting, visual management, and intelligent decision-making for agricultural production, and also allows agriculture and rural areas to share the achievements of technological development in the times. Read More

Abstract: As an important carrier of human social development, how to improve the response speed and adaptability of urban systems under uncertain factors such as disasters is currently a hot topic in international research. Based on panel data from the southern Jiangsu region from 2011 to 2020, this paper uses the entropy method to measure the resilience levels of various cities, analyzes the factors hindering urban resilience using the resilience barrier model, and explores regional resilience development differences through resilience spatial visualization analysis. The results show: (1) The overall level of urban resilience in the southern Jiangsu region presents a spatial distribution pattern of high in the east, low in the central region, and significant differences in urban resilience; (2) The ranking of urban resilience barriers in southern Jiangsu from 2011 to 2020 is: social resilience, infrastructure resilience, economic resilience, ecological resilience; (3) From the indicator level, factors such as the number of ordinary colleges and universities, total urban water supply, and general public budget revenue have a significant impact on the urban resilience barrier in southern Jiangsu. To enhance urban resilience, it is necessary to optimize the layout structure of higher education, improve urban infrastructure, and strengthen the synergy of urban construction. Read More