作者机构：
[He, Ziqiang; Zhang, Xingzhu] College of Architecture and Urban Planning, Hunan City University, Yiyang, Hunan, 413000, China;Key Laboratory of Urban Planning Information Technology of Hunan Provincial Universities, Yiyang, Hunan, 413000, China;Key Laboratory of Key Technologies of Digital Urban-Rural Spatial Planning of Hunan Province, Yiyang, Hunan, 413000, China;[Li, Jialing; Ning, Qimeng] College of Architecture and Urban Planning, Hunan City University, Yiyang, Hunan, 413000, China<&wdkj&>Key Laboratory of Urban Planning Information Technology of Hunan Provincial Universities, Yiyang, Hunan, 413000, China;[Chen, Yu] College of Architecture and Urban Planning, Hunan City University, Yiyang, Hunan, 413000, China<&wdkj&>Key Laboratory of Key Technologies of Digital Urban-Rural Spatial Planning of Hunan Province, Yiyang, Hunan, 413000, China
通讯机构：
[Yu Chen] C;College of Architecture and Urban Planning, Hunan City University, Yiyang, Hunan, 413000, China<&wdkj&>Key Laboratory of Key Technologies of Digital Urban-Rural Spatial Planning of Hunan Province, Yiyang, Hunan, 413000, China
摘要：
Green Urban Underground Spaces (GUUS) provide a promising solution to challenges of land scarcity, environmental degradation, and marine pollution in expanding cities. Nevertheless, existing studies have not established a comprehensive framework to evaluate the sustainability of GUUS with explicit consideration of their role in marine pollution mitigation. To address this gap, this study asks how GUUS alternatives can be systematically assessed to balance environmental, economic, and social sustainability while contributing to marine protection. We develop an integrated Fuzzy-TOPSIS and Lifecycle-Informed Assessment (LCA) framework that advances conventional multi-criteria decision-making approaches by incorporating uncertainty in expert judgments, evaluating lifecycle trade-offs across construction and operation phases, and directly linking underground development to marine environmental outcomes. This methodological integration enables more robust and realistic sustainability rankings compared to traditional models. The purpose of this study is to provide a decision-support framework that guides the planning and implementation of GUUS. At the same time, its main contributions lie in introducing the first lifecycle-informed fuzzy decision model tailored to underground urban infrastructure, demonstrating that multifunctional GUUS alternatives integrating stormwater management, waste control, and energy efficiency achieve higher sustainability scores than single-purpose designs, and offering policymakers and planners an actionable tool to align urban underground development with long-term sustainability and marine protection objectives. The empirical findings confirm that alternatives such as GUUS-1 and GUUS-4 outperform others in overall sustainability, whereas GUUS-5, despite its strong performance in flood control, lacks broader benefits. Sensitivity analysis further reveals that variations in environmental and economic weighting have a significant impact on rankings, underscoring the importance of balanced decision criteria.
Green Urban Underground Spaces (GUUS) provide a promising solution to challenges of land scarcity, environmental degradation, and marine pollution in expanding cities. Nevertheless, existing studies have not established a comprehensive framework to evaluate the sustainability of GUUS with explicit consideration of their role in marine pollution mitigation. To address this gap, this study asks how GUUS alternatives can be systematically assessed to balance environmental, economic, and social sustainability while contributing to marine protection. We develop an integrated Fuzzy-TOPSIS and Lifecycle-Informed Assessment (LCA) framework that advances conventional multi-criteria decision-making approaches by incorporating uncertainty in expert judgments, evaluating lifecycle trade-offs across construction and operation phases, and directly linking underground development to marine environmental outcomes. This methodological integration enables more robust and realistic sustainability rankings compared to traditional models. The purpose of this study is to provide a decision-support framework that guides the planning and implementation of GUUS. At the same time, its main contributions lie in introducing the first lifecycle-informed fuzzy decision model tailored to underground urban infrastructure, demonstrating that multifunctional GUUS alternatives integrating stormwater management, waste control, and energy efficiency achieve higher sustainability scores than single-purpose designs, and offering policymakers and planners an actionable tool to align urban underground development with long-term sustainability and marine protection objectives. The empirical findings confirm that alternatives such as GUUS-1 and GUUS-4 outperform others in overall sustainability, whereas GUUS-5, despite its strong performance in flood control, lacks broader benefits. Sensitivity analysis further reveals that variations in environmental and economic weighting have a significant impact on rankings, underscoring the importance of balanced decision criteria.
摘要：
Biomass gasification technology, as an efficient renewable energy solution, has garnered widespread attention. This study uses experimental data and exergy analysis to comprehensively investigate the impact of key process parameters such as temperature, Equivalence Ratio (ER), Steam to Carbon ratio (S/C), bed pressure, agents, catalysts, and raw material characteristics on the efficiency of biomass fluidized bed gasification. The findings suggest that higher temperatures significantly enhance the exergy and production rates of gas by improving thermodynamic and kinetic conditions. An optimal ER is identified, which balances heat release and minimizes syngas dilution, with benefits diminishing beyond this optimal range. Variations in the S/C ratio initially increase but subsequently reduce both the gas production rate and exergy efficiency. The introduction of pure oxygen notably enhances the system's efficiency. Additionally, the results indicate that optimal bed pressure is essential for fostering effective gas-solid interactions, and even a small amount of catalyst can substantially improve exergy efficiency. Additionally, increasing elemental analysis carbon rather than fixed carbon has been proven to be more beneficial for gasification, while controlling moisture content and particle size is also important for optimizing gasification performance. This study provides a pathway for the development of more efficient and effective biomass gasification systems by focusing on optimizing these critical parameters.
Biomass gasification technology, as an efficient renewable energy solution, has garnered widespread attention. This study uses experimental data and exergy analysis to comprehensively investigate the impact of key process parameters such as temperature, Equivalence Ratio (ER), Steam to Carbon ratio (S/C), bed pressure, agents, catalysts, and raw material characteristics on the efficiency of biomass fluidized bed gasification. The findings suggest that higher temperatures significantly enhance the exergy and production rates of gas by improving thermodynamic and kinetic conditions. An optimal ER is identified, which balances heat release and minimizes syngas dilution, with benefits diminishing beyond this optimal range. Variations in the S/C ratio initially increase but subsequently reduce both the gas production rate and exergy efficiency. The introduction of pure oxygen notably enhances the system's efficiency. Additionally, the results indicate that optimal bed pressure is essential for fostering effective gas-solid interactions, and even a small amount of catalyst can substantially improve exergy efficiency. Additionally, increasing elemental analysis carbon rather than fixed carbon has been proven to be more beneficial for gasification, while controlling moisture content and particle size is also important for optimizing gasification performance. This study provides a pathway for the development of more efficient and effective biomass gasification systems by focusing on optimizing these critical parameters.
期刊：
Soil Dynamics and Earthquake Engineering,2026年200:109741 ISSN：0267-7261
通讯作者：
Dongliang Meng
作者机构：
[Menggang Yang; Renkang Hu; Dongliang Meng; Wenqiang Peng] School of Civil Engineering, Central South University, Changsha, 410075, China;Earthquake Engineering Research and Test Center, Guangzhou University, Guangzhou, 510006, China;[Qiong Gao] College of Civil Engineering, Hunan City University, Yiyang, 413000, China;[Shangtao Hu] School of Civil Engineering, Central South University, Changsha, 410075, China<&wdkj&>Earthquake Engineering Research and Test Center, Guangzhou University, Guangzhou, 510006, China
通讯机构：
[Dongliang Meng] S;School of Civil Engineering, Central South University, Changsha, 410075, China
摘要：
To address the limitations of traditional passive dampers in controlling multi-level seismic excitations, the hybrid damping system, which typically incorporates various dampers, has attracted considerable interest owing to its enhanced performance. This study presents a comprehensive investigation of the Combined Viscous–Steel Damping System (CVSDS) specifically designed for the longitudinal seismic control of long-span suspension bridges. A novel dual-stage analytical model was developed to characterize the nonlinear mechanical behavior of the CVSDS, capturing the fuse-lock transition mechanism between the viscous and steel damping components. The simplified calculation approach for the supplementary damping ratio of the system was proposed and verified through numerical simulations. To validate the seismic mitigation performance of the CVSDS in realistic conditions, a series of shake table tests were conducted using a single-degree-of-freedom model that represents the longitudinal floating behavior of a suspension bridge. The results illustrate that the CVSDS can effectively reduce seismic-induced displacement by 37.9 %–60.2 % under various earthquake intensities. In particular, adjustment in the locking force allows control over the triggering sensitivity of the system, enabling tailored responses under different loading scenarios. Moreover, the proposed numerical model, which incorporates the clearance effect observed during tests, shows good agreement with experimental data, with a maximum deviation of approximately 15 %. The findings provide a practical framework for its application in long-span bridges.
To address the limitations of traditional passive dampers in controlling multi-level seismic excitations, the hybrid damping system, which typically incorporates various dampers, has attracted considerable interest owing to its enhanced performance. This study presents a comprehensive investigation of the Combined Viscous–Steel Damping System (CVSDS) specifically designed for the longitudinal seismic control of long-span suspension bridges. A novel dual-stage analytical model was developed to characterize the nonlinear mechanical behavior of the CVSDS, capturing the fuse-lock transition mechanism between the viscous and steel damping components. The simplified calculation approach for the supplementary damping ratio of the system was proposed and verified through numerical simulations. To validate the seismic mitigation performance of the CVSDS in realistic conditions, a series of shake table tests were conducted using a single-degree-of-freedom model that represents the longitudinal floating behavior of a suspension bridge. The results illustrate that the CVSDS can effectively reduce seismic-induced displacement by 37.9 %–60.2 % under various earthquake intensities. In particular, adjustment in the locking force allows control over the triggering sensitivity of the system, enabling tailored responses under different loading scenarios. Moreover, the proposed numerical model, which incorporates the clearance effect observed during tests, shows good agreement with experimental data, with a maximum deviation of approximately 15 %. The findings provide a practical framework for its application in long-span bridges.
作者：
Liu, S.;Xiang, X. N.;Chen, W. N.;Li, T.;Guo, J.;...
期刊：
Applied Ecology and Environmental Research,2025年 ISSN：1589-1623
通讯作者：
Xiang, XN
作者机构：
[Xiang, X. N.; Wang, X. X.; He, C. H.; Li, T.; Liu, J. X.; Chen, W. N.; Xiang, Y. J.; Guo, J.; Liu, S.] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Xiang, XN ] H;Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 413000, Peoples R China.
关键词：
AEE;AGSD;coupling coordination degree;DEA-SBM-ML;agricultural agglomeration areas
摘要：
This study explores the coupling relationship between AEE (Agricultural Energy Efficiency) 2011 to 2021. A carbon emission model and the super-efficiency DEA-SBM-ML (Date Envelopment Analysis - Slacks Based Measure - Malumquist-Luenberger) method are used to measure AEE, while an AGSD system is built with hybrid weighting. A coupling coordination model was used to analyze the AEEAGSD coordination. The research conclusions are as follows: (1) AEE in China's agricultural agglomeration areas shows a stable improvement; however, Gansu and Yunnan lagged. (2) The comprehensive AGSD scores exhibit a significant upward trend, although provinces like Xinjiang and Heilongjiang remain at relatively low levels. (3) Both the AEE and AGSD coupling coordination scores show an average increase of 8.11%. The coupling coordination score in the southern areas exceeds that of the northern areas by 4.98%. There is a substantial variation in the coupling coordination degrees, with most provinces achieving a good level; while Gansu stayed at barely level, urging agricultural model optimization. This study expands cross-disciplinary research on energy and ecosystems, providing theoretical support for coordinated agricultural modernization and green sustainability in China, as well as empirical insights for other regions worldwide.
作者机构：
[Liu, Guojun] Engineering Research Center of Development and Application of Ceramsite Concrete Technology, Hunan City University, Yiyang, Hunan, P.R. China;[Liu, Guojun] Key Laboratory of Green Building and Intelligent Construction in Higher Educational Institutions of Hunan Province, Hunan City University, Yiyang, Hunan, P. R. China;[Wei, Xiang] Research Center for Waste Oil Recovery Technology and Equipment, Chongqing Technology and Business University, Chongqing, China;[Hou, Zhenkun] School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, China
摘要：
The Gansu Beishan area is a preselected candidate site for a high-level radioactive waste repository in China. The development of surface rock mass discontinuities in this region is crucial for ensuring the long-term stability and safety of the project. The survey line method was employed to investigate these discontinuities. Fault geometry information was defined based on the characteristics of traffic routes and exploratory trench wall fault gouge. Optimal joint sets were identified using rose diagram equal-area upper hemisphere projection methods. Statistical analysis shows that the dominant joint orientations in each group follow a normal distribution. Using the circular sampling window theory, the mean trace length and trace midpoint density of joints for each outcrop were calculated. A Multiscale Discontinuity Comprehensive (MDC) index was proposed to evaluate the degree of surface rock mass discontinuity development based on discontinuity geometry parameters. The results of the surface rock mass discontinuity development were analyzed according to the tectonic stress and mechanical formation mechanisms of the discontinuities. These research findings provide critical data to support the ongoing development of high-level radioactive waste geological disposal.
摘要：
At present, dynamic data stream classification has achieved many successful results through concept drift detection and ensemble learning. However, generally, due to delay in concept drift detection, the active classifier may further learn data belonging to a new concept. This will ultimately degrade the generalization capability of this active classifier on its corresponding concept. Thus, how can a classifier corresponding to one concept unlearns the learned data belonging to another concept? Two unlearning algorithms are proposed to address this problem. The first one based on the passive-aggressive (PA) algorithm adopts the least squares method to reversely update the already-trained model, achieving the effect of approximately unlearning, while another based on a modified PA algorithm achieves complete unlearning by modifying the loss function of the PA algorithm. The comprehensive experiments illustrated the effectiveness of these proposed methods.
摘要：
The progress of electronic technology has driven the miniaturization and integration of devices, thereby heightening interest in micro-battery research. However, the conventional methods for fabricating micro-batteries (MBs) are characterized by complexity and high cost, presenting significant challenges to their further development. In this study, we propose a novel approach for fabricating zinc-ion micro-batteries (ZIMBs) by integrating printed current collectors with electrodeposition technology. Conductive ink, formulated from a blend of various carbon materials, was employed for screen-printing the current collectors, while MnO₂ and Zn were directly electrodeposited onto their surfaces as active materials. This approach enables the fabrication of electrodes in custom shapes, eliminating the need for pre-cutting or photolithography steps, thus reducing process complexity and optimizes costs. The full battery assembled with MnO 2 deposited on the carbon-based ink film and zinc foil exhibit remarkable rate performance, high specific capacity (417 mAh/g), and good cycling stability (81.17 % capacity retention after 1000 cycles). More importantly, the fabricated micro-battery experiences less than 5 % capacity loss after repeated bending and can reliably operate for over 200 cycles, demonstrating its potential for integration with various flexible electronic devices. This work presents a novel solution for manufacturing flexible Zn//MnO 2 batteries for future electronic applications.
The progress of electronic technology has driven the miniaturization and integration of devices, thereby heightening interest in micro-battery research. However, the conventional methods for fabricating micro-batteries (MBs) are characterized by complexity and high cost, presenting significant challenges to their further development. In this study, we propose a novel approach for fabricating zinc-ion micro-batteries (ZIMBs) by integrating printed current collectors with electrodeposition technology. Conductive ink, formulated from a blend of various carbon materials, was employed for screen-printing the current collectors, while MnO₂ and Zn were directly electrodeposited onto their surfaces as active materials. This approach enables the fabrication of electrodes in custom shapes, eliminating the need for pre-cutting or photolithography steps, thus reducing process complexity and optimizes costs. The full battery assembled with MnO 2 deposited on the carbon-based ink film and zinc foil exhibit remarkable rate performance, high specific capacity (417 mAh/g), and good cycling stability (81.17 % capacity retention after 1000 cycles). More importantly, the fabricated micro-battery experiences less than 5 % capacity loss after repeated bending and can reliably operate for over 200 cycles, demonstrating its potential for integration with various flexible electronic devices. This work presents a novel solution for manufacturing flexible Zn//MnO 2 batteries for future electronic applications.
作者机构：
[Xiao, Zhewen; Chen, Depeng] All-Solid-State Energy Storage Materials and Devices Key Laboratory of Hunan Province, College of Information and Electronic Engineering, Hunan City University, Yiyang 413000, China;Author to whom correspondence should be addressed.;[Jiang, Dongchu] All-Solid-State Energy Storage Materials and Devices Key Laboratory of Hunan Province, College of Information and Electronic Engineering, Hunan City University, Yiyang 413000, China<&wdkj&>Author to whom correspondence should be addressed.
通讯机构：
[Dongchu Jiang] A;All-Solid-State Energy Storage Materials and Devices Key Laboratory of Hunan Province, College of Information and Electronic Engineering, Hunan City University, Yiyang 413000, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
The Airyprime beam, due to its adjustable focusing ability and controllable orbital angular momentum, has attracted significant attention in fields such as free-space optical communication and particle trapping. However, systematic studies on the propagation behavior of oscillating solitons in PT-symmetric optical lattices remain scarce, particularly regarding their formation mechanisms and self-accelerating characteristics. In this study, the propagation characteristics of Airyprime beams in PT symmetric optical lattices are numerically studied using the split-step Fourier method, and the generation mechanism and control factors of oscillating solitons are analyzed. The influence of lattice parameters (such as the modulation depth P, modulation frequency w, and gain/loss distribution coefficient W0) and beam initial characteristics (such as the truncation coefficient a) on the dynamic behavior of the beam is revealed. The results show that the initial parameters determine the propagation characteristics of the beam and the stability of the soliton. This research provides theoretical support for beam shaping, optical path design, and nonlinear optical manipulation and has important application value.
摘要：
This study develops a novel hyperbolic coupled moisture-heat model by extending the non-Fourier law and non-Fick law to solve a transient response of hygrothermoelastic field induced by internal heat and moisture sources in a circular disk. In contrast to classical diffusion theory, this model captures the finite propagation velocity of heat and moisture waves through relaxation time parameters. By utilizing Laplace transform and finite Hankel transform techniques, a semi-analytical method is formulated to determine temperature, humidity, displacement, and stress fields of a disk made of T300/5208 graphite epoxy composite. The model analyzes the transient responses of the hygrothermomechanical field caused by internal thermal/moisture shocks under given temperature and moisture at its boundary and studies systematically the coupling and decoupling mechanisms among temperature, humidity, and stress fields. The findings notably enhance the accuracy of predicting composite material performance under various environmental conditions, thereby furnishing a robust scientific basis for the design and optimization of disks in multi-field environment. The proposed semi-analytical method offers invaluable insights into the intricate hygrothermoelastic behavior of composite structures.
期刊：
Measurement Science And Technology,2025年36(4):046133 ISSN：0957-0233
通讯作者：
Zhang, S
作者机构：
[Zhang, Sheng] Hunan City Univ, Sch Management, Yiyang 413000, Hunan, Peoples R China.;[Zhang, Liang; Huang, Ning; Zhang, Sheng; Deng, Zongwei] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China.;[Zhang, Liang; Zhang, Sheng; Deng, Zongwei] Hunan City Univ, Higher Educ Inst Hunan Prov, Key Lab Green Bldg & Intelligent Construct, Yiyang 413000, Hunan, Peoples R China.;[Chen, Qianqian] Hunan Commun Polytech, Inst Civil Engn, Changsha 410000, Hunan, Peoples R China.
通讯机构：
[Zhang, S ] H;Hunan City Univ, Sch Management, Yiyang 413000, Hunan, Peoples R China.;Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China.;Hunan City Univ, Higher Educ Inst Hunan Prov, Key Lab Green Bldg & Intelligent Construct, Yiyang 413000, Hunan, Peoples R China.
关键词：
rock classification;wavelet scattering transform;support vector machine;sensitivity analysis;deep learning
摘要：
In geological exploration and tunnel/underground engineering, precise, rapid, and intelligent rock lithology identification is crucial. A wavelet scattering transform-support vector machine (WST-SVM) rock image classification method is proposed that combines WST with SVM to address the limitations of conventional convolutional neural networks reliant on annotated samples. The method extracts multi-scale features from rock images using WST and trains an SVM classifier, achieving superior performance in test accuracy, macro-average precision, recall, and F1-score on a dataset of six rock types. Parameter analysis reveals that increasing invariant scale, decomposition transformations, and quality factor enhances feature matrix dimensionality and computational time. This approach reduces the need for extensive annotated samples and provides a practical solution for improving the accuracy and efficiency of rock lithology identification in geological exploration and tunnel engineering.
摘要：
As the development of urbanization in China enters the middle and late stages, improving the quality of human settlements has become a social concern. Promoting urban ecological environment management and building cities that are pleasant to live, work, and visit has become a new requirement for urban space quality improvement. ‘Spatial genes’ refer to unique and relatively stable spatial combination patterns formed by long-term interaction between urban space, natural environment, and history-culture, carrying region-specific information (Jin et al. Urban Planning 43:14–21, 2019). Located in the Western Hunan Tujia and Miao Autonomous Prefecture of Hunan Province, Fenghuang Ancient Town is a national historical and cultural city with a long history and deep cultural heritage, and it is a well-known tourist-type historical and cultural city in China; its geographic features, humanistic values, and characteristic architecture all have irreplaceable research value. In this paper, Fenghuang Ancient Town is selected as the research object, based on the spatial gene theory, through the collation and analysis of the network evaluation text of social media, the relationship between tourists and spatial gene influencing factors in the urban space is dissected, and spatial genes are identified, extracted, and classified to explore the tourists’ satisfaction evaluation of Fenghuang Ancient Town. At the same time, spatial analysis and spatial reconstruction are carried out using spatial syntax from the perspectives of geography and spatial layout, to promote the spatial upgrading and transformation of the urban environment through the re-modelling of the spatial genes of Fenghuang Ancient Town, and to provide decision-making guidance for the future urban development of Fenghuang Ancient Town.
作者：
Fan-Ming Yang;Xue-Yi Long;Sheng Long;Guo-Wen He
期刊：
Journal of Industrial and Engineering Chemistry,2025年 ISSN：1226-086X
通讯作者：
Fan-Ming Yang<&wdkj&>Guo-Wen He
作者机构：
[Xue-Yi Long; Sheng Long] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China;Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China;[Fan-Ming Yang; Guo-Wen He] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China
通讯机构：
[Fan-Ming Yang; Guo-Wen He] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China
摘要：
N-decorated porous SCP-N-n was prepared for excellent rate charge/discharge performance. The electrochemical performance was evaluated in H 2 SO 4 electrolyte and the mechanism was researched on the basis of the physical nature, the dynamic analysis data and the calculated results of density functional theory (DFT). The results show that SCP-N-n samples are amorphous porous carbon materials with plentiful N detects. Moreover, all SCP-N-n materials are dominated by mesopores and macropores. N defects exist in the form of pyridinic N, pyrrodic N, graphitized N and oxidized N. Among these defects, graphitized N and oxidized N could strengthen the conductivity and enhance the infiltration. Moreover, pyridinic N and pyrrodic N could react with H + , resulting in the generation of pseudocapacitance. In H 2 SO 4 electrolyte, both electric double-layer capacitance (EDLC) and pseudocapacitance are important components of total capacitance. When the sweep rate is 200 mV/s, the contribution ratios of EDLC and pseudocapacitance are 56.5 % and 43.5 % for SCP-N-800. When the current density is 0.5 A/g, the specific discharge capacity and energy density are 186.9F/g and 16.6 Wh/kg, respectively. At 40 A/g, the capacitance is 62.9 % of that at 0.5 A/g. After 10,000 cycles, the capacity retention of SCP-N-800 reaches 94.1 %. The excellent electrochemical feature has a significant connection with the amorphous feature, the existence of N defects, large surface area, high void space and an appropriate aperture distribution.
N-decorated porous SCP-N-n was prepared for excellent rate charge/discharge performance. The electrochemical performance was evaluated in H 2 SO 4 electrolyte and the mechanism was researched on the basis of the physical nature, the dynamic analysis data and the calculated results of density functional theory (DFT). The results show that SCP-N-n samples are amorphous porous carbon materials with plentiful N detects. Moreover, all SCP-N-n materials are dominated by mesopores and macropores. N defects exist in the form of pyridinic N, pyrrodic N, graphitized N and oxidized N. Among these defects, graphitized N and oxidized N could strengthen the conductivity and enhance the infiltration. Moreover, pyridinic N and pyrrodic N could react with H + , resulting in the generation of pseudocapacitance. In H 2 SO 4 electrolyte, both electric double-layer capacitance (EDLC) and pseudocapacitance are important components of total capacitance. When the sweep rate is 200 mV/s, the contribution ratios of EDLC and pseudocapacitance are 56.5 % and 43.5 % for SCP-N-800. When the current density is 0.5 A/g, the specific discharge capacity and energy density are 186.9F/g and 16.6 Wh/kg, respectively. At 40 A/g, the capacitance is 62.9 % of that at 0.5 A/g. After 10,000 cycles, the capacity retention of SCP-N-800 reaches 94.1 %. The excellent electrochemical feature has a significant connection with the amorphous feature, the existence of N defects, large surface area, high void space and an appropriate aperture distribution.
期刊：
EUROPEAN JOURNAL OF APPLIED MATHEMATICS,2025年:1-15 ISSN：0956-7925
通讯作者：
Liu, YF
作者机构：
[Ding, Qian; Yu, Jianshe; Liu, Yunfeng] Guangzhou Univ, Ctr Appl Math, Guangzhou, Guangdong, Peoples R China.;[Ding, Qian] Hunan City Univ, Coll Sci, Yiyang, Peoples R China.;[Guo, Zhiming; Liu, Yunfeng] Guangzhou Univ, Sch Math & Informat Sci, Guangzhou, Guangdong, Peoples R China.;[Chen, Yuming] Wilfrid Laurier Univ, Dept Math, Waterloo, ON, Canada.
通讯机构：
[Liu, YF ] G;Guangzhou Univ, Ctr Appl Math, Guangzhou, Guangdong, Peoples R China.;Guangzhou Univ, Sch Math & Informat Sci, Guangzhou, Guangdong, Peoples R China.
关键词：
seasonal change;cyclical human activity;switching dynamical system;periodic solution
摘要：
Seasonal changes and cyclical human activities (such as periodic fishing bans, Wolbachia -based mosquito population control, and school term breaks) have significant impacts on population dynamics. We propose a general switching dynamical model to describe these periodic changes. The existence, uniqueness and stability of positive periodic solutions are thoroughly investigated. The results are stated in terms of an introduced threshold value. To demonstrate their practicability, the obtained results are applied to two biological situations.
期刊：
FRONTIERS IN PSYCHOLOGY,2025年16:1502112 ISSN：1664-1078
通讯作者：
Shuhong, L
作者机构：
[Peng, Qiao] Hunan City Univ, Sch Humanities, Yiyang, Peoples R China.;[Shuhong, Li; Shuhong, L] Ocean Univ China, Coll Foreign Languages, Qingdao, Peoples R China.
通讯机构：
[Shuhong, L ] O;Ocean Univ China, Coll Foreign Languages, Qingdao, Peoples R China.
关键词：
Emotional intelligence1;emotional factor2;language achivement3;second language acquisition4;Meta-analysis5
摘要：
Emotional intelligence (EI) has garnered sustained theoretical and empirical attention over recent decades. Within the domain of linguistics, a growing body of research has investigated the relationship between EI and language achievement. Publication trends in this area reveal two distinct phases: a period of lukewarm attention (2009-2017), followed by a phase of rapid growth (2018-present). The present meta-analysis aims to determine whether EI significantly influences language achievement. Drawing on data from 47 independent studies, comprising 63 effect sizes and a total sample of 18,649 participants, this study found a small but significant correlation between EI and subjective language achievement (r = 0.24), and a moderate correlation with objective language achievement (r = 0.41). Moderator analyses revealed that the relationship between EI and objective language achievement varied significantly by educational level, target language, language skill assessed, and publication year. In contrast, no significant moderation effects were found for research type, learning context, students' major, first language, or the measurement instruments employed. These findings underscore the important role of EI in language learning and highlight the need for emotionally responsive and supportive pedagogical environments that contribute to the sustainable development of foreign language education.
摘要：
Pb contamination is a serious environmental concern, posing significant threats to ecosystems and human health. Biochar-based functional materials have attracted considerable attention owing to their great potential for practical application. In this study, a novel N-functionalized tourmaline-biochar composite (TNBC) from pomelo peels with co-modifications using urea and tourmaline was developed. The immobilization of Pb in solution and soil by TNBC was investigated, and influencing factors and mechanisms were also analyzed. The experimental maximum adsorption capacity of Pb 2+ on TNBC was 600.60 mg/g. Analysis of morphologies and surface functional groups revealed that precipitation regulated Pb 2+ adsorption on TNBC, followed by cation exchange, complexation, and metal-π interaction. The effect of co-existing cations in the solution on adsorption was marginal. Correlation analysis disclosed that enriched plenty of minerals and N-functional groups on TNBC surface were the main reasons for improving Pb 2+ adsorption on TNBC compared with pristine biochar. Moreover, TNBC exhibited potential for soil remediation and could be an alternative amendment for Pb contamination. The TNBC increased the pH, electroconductivity, and residual Pb content of the polluted soil; therefore, it can ameliorate the effects of Pb contamination in the soil. This study provides an alternative viewpoint on developing functionalized biochar composites for soil remediation.
Pb contamination is a serious environmental concern, posing significant threats to ecosystems and human health. Biochar-based functional materials have attracted considerable attention owing to their great potential for practical application. In this study, a novel N-functionalized tourmaline-biochar composite (TNBC) from pomelo peels with co-modifications using urea and tourmaline was developed. The immobilization of Pb in solution and soil by TNBC was investigated, and influencing factors and mechanisms were also analyzed. The experimental maximum adsorption capacity of Pb 2+ on TNBC was 600.60 mg/g. Analysis of morphologies and surface functional groups revealed that precipitation regulated Pb 2+ adsorption on TNBC, followed by cation exchange, complexation, and metal-π interaction. The effect of co-existing cations in the solution on adsorption was marginal. Correlation analysis disclosed that enriched plenty of minerals and N-functional groups on TNBC surface were the main reasons for improving Pb 2+ adsorption on TNBC compared with pristine biochar. Moreover, TNBC exhibited potential for soil remediation and could be an alternative amendment for Pb contamination. The TNBC increased the pH, electroconductivity, and residual Pb content of the polluted soil; therefore, it can ameliorate the effects of Pb contamination in the soil. This study provides an alternative viewpoint on developing functionalized biochar composites for soil remediation.
摘要：
In this paper, a degenerated reaction-diffusive avian influenza model with logistic source and spatial heterogeneity is proposed. We analyze the global compact attractor of the solution semi-flow of the model using the $ k $-contraction method. Furthermore, the threshold dynamics in terms of the basic reproduction number $ \mathcal{R}_0^{h} $ are investigated. Specifically, if $ \mathcal{R}_0^{h} < 1 $, the infection-free steady state of the system is globally asymptotically stable. If $ \mathcal{R}_0^{h} >1 $, then the endemic equilibrium is uniformly persistent. Finally, numerical simulations are performed to demonstrate the theoretical results.
