作者机构：
[Zhiliang Huang; Hangyang Li; Jiu Yin; Tongguang Yang; Tianying Zhang; Ling Cao] Key Laboratory for Energy monitoring and Edge Computing of Smart City, Hunan City University, Yiyang 413002, China;[Huaixing Wang] Huizhou Liwinon New Energy Technology Co., Ltd., Huizhou 516123, China;[Rongchuan Zhang] Wuhan Second Ship Design and Research Institute, Wuhan 430200, China
通讯机构：
[Zhiliang Huang] K;Key Laboratory for Energy monitoring and Edge Computing of Smart City, Hunan City University, Yiyang 413002, China
期刊：
Separation and Purification Technology,2025年356:129945 ISSN：1383-5866
通讯作者：
Guowen He
作者机构：
[Yun Li; Yirui Sun; Zihan Huang; Xiuhao Zhu; Shang Li; Ping Chen; Yalan Tang] College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China;[Jiaqi Bu] Hunan Haili Chemical Industry Co., Ltd., Changsha 410007, PR China;[Guowen He] College of Materials and Chemical Engineering, Hunan City University, Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan province, Yiyang 413000, PR China;Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, The “Double-First Class” Application Characteristic Discipline of Hunan Province (Pharmaceutical Science), Changsha Medical University, Changsha 410219, PR China;[Shian Zhong] College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China<&wdkj&>Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, The “Double-First Class” Application Characteristic Discipline of Hunan Province (Pharmaceutical Science), Changsha Medical University, Changsha 410219, PR China
通讯机构：
[Guowen He] C;College of Materials and Chemical Engineering, Hunan City University, Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan province, Yiyang 413000, PR China
作者机构：
[Luo, Qiao; Yu, Hongbing] Hunan City Univ, Coll Architecture & Urban Planning, Yiyang 413000, Peoples R China.;[Luo, Qiao; Yu, Hongbing] Hunan City Univ, Coll Architecture & Urban Planning, Lab Key Technol Digital Urban Rural Spatial Planni, Yiyang 413000, Peoples R China.;[Li, Yong] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atmo, Beijing 100029, Peoples R China.;[Jiang, Shufang; Cao, Xueyou] Forestry Bur Yiyang City, Yiyang 410004, Peoples R China.
通讯机构：
[Li, Y ] C;Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atmo, Beijing 100029, Peoples R China.
关键词：
South Dongting Lake Nature Reserve;blue space;green space;precipitation;air temperature
摘要：
<jats:p>In recent years, the water level of the Dongting Lake (DTL) has been continuously low, and the wetland area and landscape pattern have changed significantly. Considering the obvious spatial heterogeneity of water regime changes in different waters of the DTL, this paper takes two core areas of the South Dongting Lake Nature Reserve (SDLNR) as study areas and analyzes the spatial distribution characteristics of the wetland blue–green landscape patterns by using remote sensing image data and hydrological and meteorological data. The multi-scale correlation between runoff, precipitation, temperature, and evapotranspiration in the SDLNR was studied via cross-wavelet transform analysis. The results show the following: (1) The change in the blue–green spatial patterns in different regions in different periods is inconsistent, and this inconsistency is related to the topography, climate, and human activities in each region; (2) there are seasonal fluctuations in precipitation, air temperature, and evapotranspiration in the SDLNR. Among them, the annual mean temperature shows a rising trend and passes the significance test with 95% confidence, while the annual mean precipitation and annual mean evapotranspiration show no significant change trend; and (3) our Pearson correlation analysis and cross-wavelet change results show that precipitation and temperature are strongly correlated with runoff, with a resonance period of 8–16 months, while the correlation between evapotranspiration and runoff is not significant. We recommend that policymakers establish an effective early warning system and make plans to store water through micro-terrain transformation in possible climate change treatments and strategies.</jats:p>
摘要：
China's rural reform is reliant on farmers' cooperatives as a key organization vehicle. It plays an important role in promoting rural revitalization. Such as, realizing the organic connection between small farmers and agricultural modernization. This study used the nearest neighbor index and kernel density estimation to analyze the spatial distribution and structural characteristics of farmer cooperatives in Hunan Province. It revealed the spatial differentiation law of cooperatives. Also using geographical detectors to figure out the main factors that affect the spatial distribution. The results show that: ① Hunan Farmers Cooperatives show significant spatial agglomeration. The overall spatial distribution shows the spatial characteristics of "one core, one circle, and multiple points". And the spatial distribution pattern of "large agglomeration, finger-shaped radiation distribution". Among them, the distribution of provincial demonstration cooperatives is relatively balanced. ② Cooperatives in six types of industries, such as planting, forestry, and feeding, showed agglomeration distribution. Different industrial cooperatives spread out in different ways, such as in an anti-"L" shape, a dual-core shape, or a one-center area. ③ The 24 influence factors selected from the five dimensions of the natural environment, social economic basis, production basis, output capacity, and facility basis have high, general, and weak influence on cooperatives' spatial distribution. The development and distribution of cooperatives mainly depend on resource endowment, social and economic development level, and market dependence. The spatial distribution heterogeneity of different professional cooperatives is mainly affected by slope, per capita disposable income of rural residents, road density, and other factors. ④ The progression of farmer cooperatives in Hunan Province should prioritize high-quality development, emphasizing the need for innovative approaches and transformative strategies within rural industrial organizations. It is imperative to optimize the spatial distribution of cooperatives, strategically contributing to the establishment of a novel framework for modern agricultural development in Hunan Province. Additionally, there is a critical emphasis on spearheading collaborative initiatives among cooperatives of varied industrial types, aimed at fostering the integrated development of rural primary, secondary, and tertiary industries.
期刊：
Structural Engineering and Mechanics,2024年91(3):239-250 ISSN：1225-4568
通讯作者：
Gong, BB
作者机构：
[Gong, Binbin] Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.;[Gong, Binbin] Hunan Engn Res Ctr Struct Safety & Disaster Preven, Yiyang 413000, Peoples R China.;[Li, Hao] CCCC Third Highway Engn Co Ltd, Beijing 100102, Peoples R China.
通讯机构：
[Gong, BB ] H;Hunan City Univ, Coll Civil Engn, Yiyang 413000, Peoples R China.;Hunan Engn Res Ctr Struct Safety & Disaster Preven, Yiyang 413000, Peoples R China.
关键词：
cracks;fracture behavior;reinforced concrete;rigid body spring model;Voronoi diagram
摘要：
With the aim to provide better predication about fracture behavior, a numerical simulating strategy based on the rigid spring model is proposed for reinforced concrete (RC) structures in this study. According to the proposed strategy, concrete is partitioned into a series of irregular rigid blocks based on the Voronoi diagram, which are connected by interface springs. Steel bars are simulated by bar elements, and the bond slip element is defined at bar element nodes to describe the interaction between reinforcement and concrete. A concrete damage evolution model based on the separation criterion is adopted to describe the weakening process of interface spring between adjacent blocks, while a nonlinear bond slip model is introduced to simulate the synergy behaviour of reinforced steel bars and concrete. In the damage evolution model of concrete, the influence of compressive stress perpendicular to the interface on the shear strength is considered. To check the effectiveness and applicability of the proposed modelling, experimental and numerical studies about a simply- supported RC beam and the two- notched concrete plates in Nooru-Mohamed's- Mohamed's experiment are conducted, and the grid sensitivity are investigated.
摘要：
This study prepared pomelo peel biochar (PBC) under different pyrolysis temperatures (T) (300-800 degrees C) and investigated the removal efficiency of tetracycline (TC) under the oxidative systems established by PBC and oxidants (hydrogen peroxide (H2O2), peroxymonosulfate (PMS), and peroxydisulfate (PDS)). The correlation between the properties of PBC and the removal efficiencies of TC was studied by Pearson analysis to clarify the critical properties of biochar in catalytic processes. The inorganic carbon (IC), ash, pH, basic functional groups (BFG), specific surface area (SSA), microporous surface area (S-micro), pore volume (PV), and graphitization degree (I-D/I-G) of PBC were positively correlated with the increase of T (p < 0.05). Notably, the SSA and PV of PBC increased from 4.294 m(2)/g and 0.002 cm(3)/g to 496.864 m(2)/g and 0.261 cm(3)/g as the pyrolysis temperature increased from 300 to 800 degrees C. In contrast, the yield, organic carbon (OC), and acidic functional groups (AFG) of PBC displayed negatively correlated with the increase of T (p < 0.05). R-ad, R-PBC/H2O2, R-PBC/PMS, and R-PBC/PDS represented the removal efficiencies of TC by PBC adsorption, PBC/H2O2, PBC/PMS, and PBC/PDS system. R-PBC/H2O2, R-PBC/PMS, and R-PBC/PDS showed a highly positive correlation to the R-ad (r = 0.965, 0.952, 0.946, p < 0.01). R-ad, R-PBC/H2O2, R-PBC/PMS, and R-PBC/PDS were positively correlated with K, Mg, ash, pH, BFG, and I-D/I-G (p < 0.01). There was no statistically significant correlation between persistent free radicals (PFRs) and the removal efficiencies of TC. Furthermore, SSA and PV showed positive relationships with the removal efficiencies of TC in the PBC/PMS and PBC/PDS systems, but no significant correlation with the removal efficiencies of TC in the PBC/H2O2 systems. Moreover, the catalytic behaviors and mechanisms were studied in the PBC-800 based oxidative systems. The quenching experiments and EPR spectra indicated that singlet oxygen (O-1(2)) was the main active species. Except for O-1(2), superoxide radical (O-2(center dot-)) also contributed to TC removal in the oxidative systems. From the changes in used PBC-800, the disordered sp(2) hybrid carbon, sp(3) C-C, and pyridinic-N were the main active sites in activation.
