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Research on the Coupling and Coordination of Urbanization and Ecological Resilience in the Districts of Quanzhou City, China 认领 引用
1
作者 ZHANG Min XUE Chengzhi +1 位作者 ZHU Siyu CHEN Jiai 《Journal of Geodesy and Geoinformation Science》 CSCD 2026年第1期100-120,共21页
Under the increasingly tight constraints of resources and environment,achieving the coordinated advancement of urbanization and ecological protection has become a core issue for regional sustainable development in the... Under the increasingly tight constraints of resources and environment,achieving the coordinated advancement of urbanization and ecological protection has become a core issue for regional sustainable development in the new era.This study develops a dual-dimensional urbanization evaluation system incorporating both population and economic indicators,and integrates a comprehensive ecological resilience assessment framework based on size,density,and morphology to analyze the spatiotemporal evolution and coordination between urbanization and ecological resilience in Quanzhou’s districts from 2018 to 2022.The results reveal a distinct spatial pattern in which urbanization levels are lower in central areas and higher in peripheral regions.Licheng District demonstrates the highest urbanization level with an average value of 0.78,while Luojiang District remains at the lowest level,constrained by economic development factors.Regarding ecological resilience,Luojiang District exhibits a highlevel model of“high size resilience-medium density resilience-high morphology resilience.”In contrast,Fengze District exhibits the poorest resilience with a significant 29.74%decline over the five years.The coordination analysis reveals a spatial configuration characterized by imbalance in central districts and better coordination in peripheral areas.Licheng District achieves optimal coordination through enhanced density resilience.Quangang District maintains basic coordination despite a 7.47%decline,which is influenced by energy-intensive industries.Both Luojiang and Fengze Districts experience severe coordination imbalances,with Luojiang constrained by urbanization delays and Fengze suffering from poor performance across all three resilience dimensions under intensive development pressure.The study reveals the intrinsic mechanism underlying the coordinated development of urbanization and ecological resilience.The findings provide a scientific basis for formulating differentiated development strategies in economically developed coastal areas,offering significant reference value for promoting high-quality regional development and ecological civilization construction. 展开更多
关键词 districts of Quanzhou City urbanization ecological resilience coupling and coordination
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Geological Hazard Susceptibility Assessment in Shouning County Based on Information Quantity Method 认领 引用
2
作者 ZHANG Min CHEN Jiai +2 位作者 CHEN Zhefeng ZHENG Zhe XUE Chengzhi 《Journal of Geodesy and Geoinformation Science》 CSCD 2025年第3期70-91,共22页
This study develops a geological hazard evaluation index system for Shouning County,a key area for disaster prevention in Fujian Province.Through detailed investigation reports and field surveys,six factors were selec... This study develops a geological hazard evaluation index system for Shouning County,a key area for disaster prevention in Fujian Province.Through detailed investigation reports and field surveys,six factors were selected,including elevation,slope gradient,slope aspect,stratigraphic lithological group,distance from the water systems,and geological structures.A geological hazard susceptibility zoning map was created using the Information Quantity Method(IQM).The evaluation showed that elevation,slope aspect,and distance from the water systems are primary risk factors,with high and extremely high susceptibility areas covering 168.57 km2(52.63%of the study area)and a disaster point density of 3.07 points/km2.The model achieved an accuracy of 0.73,validating its effectiveness in hazard assessment.These findings provide a valuable reference for disaster prediction and mitigation in Shouning County,supporting improved planning and risk management efforts. 展开更多
关键词 Shouning County geological hazards information quantity method susceptibility evaluation
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An optimal design of the liquid-cooling plate channel in a power battery based on response surface methodology 认领 引用
3
作者 Jinbo Zheng Jibin Jiang +2 位作者 Xiwei Yu Bingjun Yan Guofu Lian 《中国科学技术大学学报》 CAS CSCD 北大核心 2025年第2期52-65,51,I0002,共14页
The work takes a new liquid-cooling plate in a power battery with pin fins inside the channel as the object.A mathematical model is established via the central composite design of the response surface to study the rel... The work takes a new liquid-cooling plate in a power battery with pin fins inside the channel as the object.A mathematical model is established via the central composite design of the response surface to study the relationships among the length,width,height,and spacing of pin fins;the maximum temperature and temperature difference of the battery module;and the pressure drop of the liquid-cooling plate.Model accuracy is verified via variance analysis.The new liquid-cooling plate enables the power battery to work within an optimal temperature range.Appropriately increasing the length,width,and height and reducing the spacing of pin fins could reduce the temperature of the power battery module and improve the temperature uniformity.However,the pressure drop of the liquid-cooling plate increases.The structural parameters of the pin fins are optimized to minimize the maximum temperature and the temperature difference of the battery module as well as the pressure drop of the liquid-cooling plate.The errors between the values predicted and actual by the simulation test are 0.58%,4%,and 0.48%,respectively,which further verifies the model accuracy.The results reveal the influence of the structural parameters of the pin fins inside the liquid-cooling plate on its heat dissipation performance and pressure drop characteristics.A theoretical basis is provided for the design of liquid-cooling plates in power batteries and the optimization of structural parameters. 展开更多
关键词 response surface methodology power battery cooling channel optimal design
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Study on the Propagation and Focusing Mechanism of Long Waves over A Submerged Atoll 认领 引用
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作者 FU Dan-juan LIU Bi-jin +2 位作者 ZHENG Jin-hai WANG Gang CHEN Bi-qin 《China Ocean Engineering》 SCIE EI CSCD 2023年第2期204-217,共14页
An analytical solution for long waves propagating over a submerged atoll is established. The atolls involved in this study are annular coral reefs with large lagoons in the middle, and the expression of the cross sect... An analytical solution for long waves propagating over a submerged atoll is established. The atolls involved in this study are annular coral reefs with large lagoons in the middle, and the expression of the cross section is a trinomial function of the radial distance, i.e., h=ar(2s)-br~s+h_0, where s is the positive rational number. This analytical solution extends the theory by Wang et al.(2018) as s is no longer limited to s=2/m, where m is the positive integer. In addition, by adjusting the terrain parameters properly, the analytic solution can be degenerated to describe the wave propagation over topography with a hump or pit. According to the relationship between wave rays and wave energy, the distribution characteristics and formation mechanism of energy over the topography are expounded. When the lagoon is non-existent, all wave rays converge at the x-axis, which results in an abrupt amplification of the wave amplitude around the convergence point. When a lagoon is mounted on the top of the atoll, the rays are scattered due to the refraction of the lagoon, and only some rays converge at the symmetrical axis and the ridges on both sides,which results in the amplification of wave amplitudes in these areas. 展开更多
关键词 long waves analytic solution wave scattering submerged atoll wave propagation
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Current-limiting Characteristics of a Modified Flux-coupling Type Superconducting Fault Current Limiter and Its Effects on the Transient Stability of a Multi-machine Power System 认领 引用
5
作者 Yonghui He Langheng Cao Feng Zheng 《Chinese Journal of Electrical Engineering》 EI CSCD 2021年第2期93-102,共10页
A modified flux-coupling type superconducting fault current limiter(SFCL)is proposed here for suppressing fault currents.The modified SFCL consists of a coupling transformer,an yttrium barium copper oxide(YBCO)pancake... A modified flux-coupling type superconducting fault current limiter(SFCL)is proposed here for suppressing fault currents.The modified SFCL consists of a coupling transformer,an yttrium barium copper oxide(YBCO)pancake coil,and a controlled switch.By flexibly adjusting the controlled switch’s contact states based on the system operational conditions,the coupling transformer’s primary inductance as well as the YBCO coil’s normal-state resistance are incorporated into the main system for current limitation.Because the modified SFCL has the advantages of resistive and inductive SFCLs,it may improve the power system’s transient behavior.Hence,the SFCL’s effect on the transient stability of a multi-machine power system was also theoretically investigated.Further,simulations were conducted for accessing the SFCL’s performance characteristics under different fault conditions.The results show that using the proposed SFCL can effectively restrain the increased fault current and improve the bus voltage sag;meanwhile,the imitated multi-machine system’s power-angle oscillation can be obviously reduced. 展开更多
关键词 Current-limiting characteristics flux-coupling type SFCL multi-machine power system transient stability
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