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Pull-out capacity and energy absorption of cable bolts under impact loading 认领 引用
1
作者 Adel Mottahedi Naj Aziz +1 位作者 Alex Remennikov Ali Mirzaghorbanali 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2026年第1期23-42,共20页
This study investigates the performance of high-strength cable bolts under impact loading conditions representative of rock bursts in underground environments.Although widely used,the dynamic behaviour of these cable ... This study investigates the performance of high-strength cable bolts under impact loading conditions representative of rock bursts in underground environments.Although widely used,the dynamic behaviour of these cable bolts has received limited experimental attention,and their effectiveness in seismically active zones remains a subject of ongoing debate.To address this gap,a reverse pull-out test machine integrated with a drop hammer rig was employed.Tests were conducted on 70-t SUMO bulbed and non-bulbed cable bolts with encapsulation lengths of 300 and 450 mm,subjected to an impact energy of 14.52 k J.Results indicate that non-bulbed cables,despite showing lower initial peak loads(average 218 vs.328 k N for bulbed cables at 300 mm encapsulation),demonstrated superior energy absorption(average 11.26 vs.8.75 k J)and displacement capacity(average 48.40 vs.36.25 mm).Increasing the encapsulation length for bulbed cables led to a reduction in initial peak load but improved displacement and energy absorption.The dominant failure mechanism was debonding at the cable-grout interface,characterised by frictional sliding and cable rotation.These findings provide new insights into the energy dissipation mechanisms of cables and support the development of more resilient ground support systems for dynamically active conditions. 展开更多
关键词 Rock reinforcement Cable bolt Impact loading Pull-out testing Mine seismicity Rock burst
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Bearing capacity,shear band evolution,and deformation characteristics of slopes reinforced by root-inspired anchors using transparent soil model testing 认领 引用 被引量：1
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作者 Ruijie Huang Wengang Zhang +6 位作者 Jiaying Xiang Ningning Zhang Matteo Oryem Ciantia Jian Yin Leilei Liu Jushan Wang Anzhai Fei 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第1期457-471,共15页
Root-inspired anchorage systems in the field of bio-inspired geotechnics are renowned for enhancing the pullout capacity of traditional geotechnical anchorage systems by simulating the morphology and architecture of p... Root-inspired anchorage systems in the field of bio-inspired geotechnics are renowned for enhancing the pullout capacity of traditional geotechnical anchorage systems by simulating the morphology and architecture of plant root systems.However,limited studies have explored their practical applications,particularly in improving slope stability.To fill this gap,this study investigates the reinforcement effect of root-inspired anchors on slope stabilization using transparent soil modeling and 3D-printed anchors,and examines the impact of anchor branching patterns(i.e.branching numbers,branching angle,and branching nodes)on slope bearing capacity,shear band evolution,and temporal and spatial variation of slope deformation.The results show that peak slope bearing capacity increases with branching numbers and branching angles,correlating with the envelope area of the curved shear band.Upper anchors result in step-like deflections in the shear band near the trailing edge,while lower anchors convert the upward concave shear band into an upward convex one,thus increasing the slope bearing capacity.Slope deformation is minimized with intermediate branching parameters,such as a branching number of 4 and a branching angle of 45°.The anchor reinforcement mechanisms,i.e.anchor rod shear resistance,interface friction,anchor pullout capacity,and plate tightening effects,are comprehensively discussed,and the installation effects resulting from compromise slope modeling are identified as the contributors.These findings shed light on the failure process of root-inspired anchors reinforced slopes and provide a preliminary reference for potential applications,especially for the tradeoff between anchor branching,slope deformation,and slope stability. 展开更多
关键词 Bio-inspired geotechnics Root-inspired anchors Transparent cemented soil Slope bearing capacity Shear band evolution
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Simulation Analysis of Thermal Load and Ultimate Bearing Capacity of Hull Girder Under Cabin Fire 认领 引用 被引量：1
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作者 Chenfeng Li Guanchen Wei +2 位作者 Zixiong Kang Houyao Zhang Xueqian Zhou 《哈尔滨工程大学学报（英文版）》 CSCD 2026年第3期758-774,共17页
The hull structure may collapse or deform severely under fire conditions.In this study,the safety of a ship's cabin structure under fire is evaluated using a dual-zone large eddy fire scenario simulation method an... The hull structure may collapse or deform severely under fire conditions.In this study,the safety of a ship's cabin structure under fire is evaluated using a dual-zone large eddy fire scenario simulation method and a sequential thermo-mechanical coupling analysis method.Taking a three-compartment section of a naval surface ship as a case study,a machinery room fire scenario was simulated and the fire temperature field was analyzed.Through a dedicated data interface,the full-field time-varying temperature loads were mapped to the finite element model of the compartment section,thereby achieving thermo-mechanical coupled analysis of the cabin structure.The effects of thermal expansion on the hull structure under rising fire temperatures were considered in the evaluation of the residual load-bearing capacity of the cabin.The results indicate that the residual load-bearing capacity of the compartment is closely linked to the fire development stage.Temperature not only significantly affects the mechanical properties of steel but also influences the structural load-bearing capacity through thermally stresses. 展开更多
关键词 Ship and ocean engineering Cabin fire Fire simulation Thermal load Thermo-mechanical coupling analysis Residual bearing capacity
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High capacity output via all-carbon host in current collector-free Li-S batteries 认领 引用
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作者 Haina Ci Chaoxu Hao +10 位作者 Jinghui Yang Songyang Liu Qinglei Sun Yuhang Xia Xuedong Wang Ningning Liu Yingze Song Zhiming Liu Changqing Chu Yan He Jingyu Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第5期736-743,I0017,共8页
Conventional metallic current collectors in lithium-sulfur(Li-S)batteries suffer from high cost,corrosion,and poor compatibility with high-sulfur-loading electrodes.Here,we develop a current collector-free allcarbon h... Conventional metallic current collectors in lithium-sulfur(Li-S)batteries suffer from high cost,corrosion,and poor compatibility with high-sulfur-loading electrodes.Here,we develop a current collector-free allcarbon host to achieve high-performance Li-S systems.Graphene(Gr)nanosheets are in situ grown on carbon nanotubes(CNTs)via plasma-enhanced chemical vapor deposition(PECVD),forming Gr@CNTs heterojunctions that serve simultaneously as conductive frameworks and self-supporting hosts.This hierarchical architecture can effectively overcome the stacking and closure issues of each component.Thus-obtained Gr@CNTs host exhibits ultrafast polysulfide adsorption(within 5 s in 5 mmol L-1Li2S6solution)and enables uniform sulfur deposition,ensuring efficient charge transport and suppressed shuttle effect.Consequently,the all-carbon host Li-S batteries deliver a high capacity of 1609.32 mA h g-1at 0.2C and remarkable cycling stability with only 0.073%decay per cycle over 300 cycles at 5C,establishing a promising pathway toward lightweight,high-energy-density Li-S systems. 展开更多
关键词 Graphene@carbon nanotubes All-carbon host Current collector-free High capacity Lithium-sulfur batteries
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Future changes in ozone and oxidation capacity in China under the carbon peaking policy:The role of emissions and meteorology 认领 引用
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作者 Ao Shen Yiming Liu +3 位作者 Yuqi Zhu Xiao Lu Qi Fan Lei Li 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第7期504-515,共12页
Future ozone(O₃)pollution in China is shaped by complex interactions between emission reductions and meteorological changes under China’s carbon peaking and neutrality targets.This study employs the WRF-CMAQ modeling... Future ozone(O₃)pollution in China is shaped by complex interactions between emission reductions and meteorological changes under China’s carbon peaking and neutrality targets.This study employs the WRF-CMAQ modeling system with process analysis to quantify the impacts of meteorology and emissions on O₃and atmospheric oxidation capacity(AOC)across major Chinese regions in 2030.Under the carbon peaking scenario,wintertime O₃concentration increases across most regions,while summertime daytime O₃decreases except in the Yangtze River Delta(YRD).Nighttime O₃generally increases across all regions,and overall AOC is enhanced,particularly in summer.Disentangling the roles of meteorology and emissions shows that,although meteorological changes alone would reduce O₃in winter through enhanced dilution and limited photochemical activity,the effect of emission reductions dominates by weakening the nitric oxide(NO)titration effect,resulting in a net O₃increase.In summer,daytime emission reductions weaken NO titration,while higher humidity suppresses O₃formation,except in the YRD,where reduced humidity promotes O₃production.At night,stronger winds enhance vertical mixing and promote the downward transport of O₃from the residual layer,and the reduced NO titration effect further increases O₃levels.These findings underscore the importance of targeted mitigation strategies that account for the distinct seasonal and regional responses of O₃and AOC to both emission and meteorological changes under future climate and policy scenarios. 展开更多
关键词 Ozone Atmospheric oxidation capacity Carbon peaking policy WRF-CMAQ Process analysis
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Positive or negative relationship between forest fragmentation and carbon sequestration capacity across different urban agglomerations in China 认领 引用
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作者 Xinyu Wang Zhibin Ren +4 位作者 Chengcong Wang Peng Zhang Shengyang Hong Ruoxuan Geng Boyang Zhang 《Journal of Forestry Research》 SCIE EI CAS CSCD 2026年第3期159-179,共21页
Forest fragmentation is a key ecological process influencing the functions of forest ecosystems,particularly in the context of rapid urbanization.However,at the national scale,the regional changes of forest fragmentat... Forest fragmentation is a key ecological process influencing the functions of forest ecosystems,particularly in the context of rapid urbanization.However,at the national scale,the regional changes of forest fragmentation and its effects on forest carbon sequestration capacity(CSC)remain unclear in urban agglomerations.Based on the established Forest Fragmentation Index(FFI),this study assessed the regional heterogeneity of forest fragmentation and systematically analyzed the nonlinear response of CSC to FFI,using a piecewise linear regression model,an XGBoost-SHAP framework,and PLS-SEM.We found that the average FFI across all urban agglomerations was 0.45,with 54.96%of the area exhibiting moderate fragmentation(FFI=0.4−0.6).The average FFI in urban agglomerations was highest in subtropical monsoon climate(SMC)zones and lowest in temperate continental climate(TCC)zones.CSC showed a distinct spatial pattern of“stronger in low latitudes and coastal(eastern)regions,weaker in high latitudes and inland(western)regions”.Nationally,34.4%of the regions exhibited CSC levels ranging from 400 to 600 g·m-2·a-1,with the highest mean CSC in SMC and the lowest in TCC.We identified clear FFI thresholds affecting CSC across different climate zones:0.48 in TCC,0.39 in temperate monsoon climate(TMC),and 0.36 in SMC.While low levels of fragmentation may have marginal positive effects,high fragmentation significantly threatens CSC.Moreover,in the TCC zone,temperature was the dominant driver,with FFI enhancing CSC primarily through positive pathways mediated by temperature and leaf area index(LAI).In contrast,in the TMC and SMC zones,evapotranspiration(ET)was the dominant factor,and FFI suppressed CSC by reducing LAI and ET.This study reveals the complex mechanisms by which forest fragmentation,coupled with multiple factors,drives CSC,providing scientific insights for urban forest management and carbon neutrality policies. 展开更多
关键词 Urban agglomerations Climate zones Forest fragmentation Carbon sequestration capacity
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Dependable dynamic capacity provision of wind-storage plants 认领 引用
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作者 Ziqi Shen Wei Wei +2 位作者 Zhongjie Guo Laijun Chen Shengwei Mei 《iEnergy》 EI 2026年第1期55-70,共16页
Although wind energy is volatile,the output of a wind-storage plant is partially dispatchable,making it a promising paradigm on the generation side.A grid-friendly wind-storage plant ought to be able to continuously o... Although wind energy is volatile,the output of a wind-storage plant is partially dispatchable,making it a promising paradigm on the generation side.A grid-friendly wind-storage plant ought to be able to continuously output the desired power over a certain period of time.This paper proposes a dependable dynamic capacity provision scheme of a wind-storage plant over a daily horizon.It stipulates a minimum number of periods during which the committed capacity must be fulfilled and a maximum mismatch during the remaining periods when the desired power output is not achievable.In the general case,the day-ahead piecewise constant capacity provision results in a two-stage stochastic program formulated as a mixed-integer linear program.Specifically,for constant capacity provision,a decomposition algorithm is developed to determine the global optimal solution,and the complexity grows linearly with the number of scenarios.Given the committed capacity trajectory,the real-time operation problem is modeled as a four-state stochastic dynamic program.The discrete state-action values are derived recursively via the principle of optimality.Real-time dispatch actions are generated by using the action-value tabular leveraging inexact ultra-short-term forecasts.Numerical tests over one year demonstrate that the proposed method successfully fulfills reliable operation on 355 days and achieve an optimality gap of 9.47%compared with the ex-post optimum,which is comparable to model predictive control using exact 2–3-hour-ahead wind power forecasts. 展开更多
关键词 Wind power Energy storage Dynamic capacity provision Real-time operation
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Liquid mulching film mitigates cationic heavy metals migration via enhancing soil organic matter and cation exchange capacity 认领 引用
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作者 Lijuan Cha Zhiyun Zhang +7 位作者 Ruiyao Shi Fangfang Li Gang Chu Lincai Peng Jing Zhao Jing Li Minghao Cheng Min Wu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期292-300,共9页
Liquid biodegradable mulching film(LBMFs)technology,an innovative agricultural technology,shows dual potential in plastic pollution reduction and heavy metal contamination control.Although their agronomic benefits are... Liquid biodegradable mulching film(LBMFs)technology,an innovative agricultural technology,shows dual potential in plastic pollution reduction and heavy metal contamination control.Although their agronomic benefits are recognized,the underlying mechanisms of LBMFs in regulating heavy metal biogeochemical cycles remain inadequately understood.This study demonstrates the effectiveness of lignin-based(JH)and chitosan-based(LB)LBMFs in modifying heavy metal speciation and minimizing their uptake by crops.The results indicated that JH and LB significantly enhanced soil organic matter(SOM)by 14.29%-27.01%and cation exchange capacity(CEC)by 20.65%-247.17%,compared to soil blank control,primarily due to the enrichment of colloids derived from lignin/chitosan and the stimulation of microbial activity.Both films reduced the bioavailability of Cd and Pb by promoting their transition from mobile acid solubleeducible(F1/F2)fractions to stable oxidizableesidual(F3/F4)fractions.In contrast,Cu and Zn speciation remained stable due to strong mineral interactions.The LBMFs also inhibited the transfer of heavy metals to edible crops.Crop-specific translocation factor(TF)variations were observed,with JH reducing pak choi TF by 32.62%-76.09%but increasing radish TF by 33.47%-437.55%,linked to lignin’s root chelation and chitosan’s phloem transport dynamics.Additionally,Mantel analysis confirmed bioconcentration factor(BCF)/TF reductions correlated strongly with elevated SOM(r=0.82/0.73)and CEC(r=0.80/0.77),governed by organo-mineral complexation and competitive cation displacement.This work positions LBMFs as valuable tools for enhancing soil health and reducing dietary risks associated with heavy metals in contaminated agricultural lands. 展开更多
关键词 Liquid mulching film Migration activity Soil organic matter Cation exchange capacity
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Unlocking the seal capacity of unconsolidated Quaternary hydrate-bearing sediments:Carbon isotope gradients as a proxy for dynamic gas trapping efficiency 认领 引用
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作者 Ya-Zhou Liu Jian-Hui Zeng +3 位作者 Jun-Cheng Qiao Gui-Wen Wang Ke-Liang Dong Shu-Ning Liu 《Petroleum Science》 SCIE EI CAS CSCD 2026年第3期1588-1605,共18页
Submarine gas hydrate systems store vast carbon inventories(∼1500–12,400 Gt C)yet pose dual risks as potential geohazard multipliers and climate feedback agents under oceanic warming.Conventional seal assessment fai... Submarine gas hydrate systems store vast carbon inventories(∼1500–12,400 Gt C)yet pose dual risks as potential geohazard multipliers and climate feedback agents under oceanic warming.Conventional seal assessment fails catastrophically in unconsolidated Quaternary hydrate-bearing sediments due to core-retrieval artifacts,hydrate morphology controls on capillary trapping,and meter-scale heterogeneity unresolved by seismic methods.Here,we pioneer methane carbon isotope(δ13C1)gradients as a dynamic proxy for seal capacity in the Qiongdongnan Basin.Integrating petrographic features,natural gas geochemical characteristics,downhole logging data,and principal component analysis(PCA)from six wells,we:(1)quantified the thermogenic gas contribution of wells W6 and W8 to be 55%–73%,and that of well W1 to be 28%–32%via binary mixing models,(2)establish that methane carbon isotope gradients>0.5‰/m diagnose effective capillary barriers,correlating with zones of pore-throat disconnection,and(3)develop a PCA-integrated logging model(cumulative variance:84.02%,R2=0.78)predicting seal capacity from conventional petrophysical parameters.Furthermore,the results validate a charge-dynamic barrier-mixing accumulation model where thermogenic gas influx elevates hydrate saturation,creating self-sealing horizons that trap underlying microbial gases and subsequently charged thermogenic gases,recorded in diagnostic methane carbon isotope reversals.This approach bridges molecular-scale fractionation and reservoir-scale processes,enabling targeted identification of high-integrity seals for optimized carbon storage and safer hydrate exploitation in rapidly deposited marginal basins. 展开更多
关键词 Seal capacity Unconsolidated hydrate-bearing sediments Carbon isotope gradients Accumulation model Qiongdongnan Basin
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Large-Capacity WDM FBG Array Interrogated by OFDR for Large Strain Measurement 认领 引用
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作者 Xiangpeng XIAO Zhengqi SUN +4 位作者 Yuejuan LYU Weiliang ZHAO Hai LIU Qizhen SUN Zhijun YAN 《Photonic Sensors》 SCIE EI CSCD 2026年第2期103-116,共14页
We propose a wavelength-division multiplexing(WDM)fiber Bragg grating(FBG)array designed to mitigate the spectral shadow effect,thereby enhancing multiplexing capacity.The array comprises 7560 FBGs,which are periodica... We propose a wavelength-division multiplexing(WDM)fiber Bragg grating(FBG)array designed to mitigate the spectral shadow effect,thereby enhancing multiplexing capacity.The array comprises 7560 FBGs,which are periodically arranged across 21 distinct wavelength channels.Each FBG has an average reflectivity of 5.5‰and a bandwidth of 0.113 nm.We employ an optical frequency-domain reflectometry(OFDR)system for interrogation,which enables high-density array demodulation and large-strain measurement.A convolutional localization algorithm is proposed to achieve fast and accurate addressing of each FBG.The sensing system achieves a maximum sensing-fiber length of 120 m and spatial resolution of 16 mm,along with a demonstrated strain range of 10000μεand wavelength accuracy of 1.2 pm.Furthermore,a 21-fold enhancement in spectral demodulation speed is realized over identical FBG arrays.Consequently,the average demodulation time per FBG is substantially reduced from 11.25 ms to 0.53 ms.These results affirm the exceptional suitability of our system for applications demanding high precision,an extensive strain range,and substantial sensor capacity. 展开更多
关键词 Fiber Bragg grating optical frequency domain reflectometry large capacity large strain measurement
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Gaussian process emulators for the undrained bearing capacity of spatially random soils using cell-based smoothed finite element method 认领 引用
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作者 H.C.Nguyen X.He +4 位作者 M.Nazem X.Chen H.Xu R.Sousa J.Kowalski 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第3期2190-2214,共25页
In this paper,we propose a novel probabilistic method for predicting the undrained bearing capacity of spatially variable soils.Our approach combines a Gaussian process regression(GPR)-based surrogate model with rando... In this paper,we propose a novel probabilistic method for predicting the undrained bearing capacity of spatially variable soils.Our approach combines a Gaussian process regression(GPR)-based surrogate model with random cell-based smoothed finite analysis.The Gaussian process emulator(GPE)serves as a statistical tool for making predictions from a data set.First,we validate the accuracy and efficiency of kinematic limit analysis using the cell-based smoothed finite element method(CS-FEM)against the standard finite element method(FEM)and edge-based smoothed FEM(ES-FEM).The numerical results demonstrate that the CS-FEM framework surpasses traditional numerical approaches,establishing its reliability in computing collapse loads.Subsequently,we conduct several hundred simulations to develop a surrogate model for predicting the undrained bearing capacity of shallow foundations.By utilizing various kernel functions,we enhance the accuracy of the GPE in these predictions.This method offers a practical and efficient solution,effectively addressing multiple uncertainties.Numerical results indicate that the GPE significantly boosts computational efficiency,achieving satisfactory outcomes within minutes compared to the days required for conventional simulations.Notably,the mean absolute percentage error(MAPE)decreases from 2.38%to 1.82%for rough foundations when employing Matérn and rational quadratic kernel functions,respectively.Additionally,combining different kernel functions further enhances the accuracy of collapse load predictions. 展开更多
关键词 Gaussian process emulator(GPE) Bearing capacity Shallow foundation Spatially variable soils
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A perspective of all-solid-state batteries with high-areal-capacity lithium-rich cathodes 认领 引用
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作者 Yi-Cheng Le Wei-Jin Kong +5 位作者 Chen-Zi Zhao Liang Shen Wen-Ze Huang Zhong-Yuan Huang Jiang-Kui Hu Qiang Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第2期780-788,I0016,共9页
1.Introduction Driven by the growing demand for energy storage systems in portable electronic devices,electric vehicles,and unmanned aerial vehicles,lithium-ion batteries(LIBs)have received considerable and sustained ... 1.Introduction Driven by the growing demand for energy storage systems in portable electronic devices,electric vehicles,and unmanned aerial vehicles,lithium-ion batteries(LIBs)have received considerable and sustained attention.The performance of routine LIBs is approaching the ceiling,particularly in terms of energy density,making it difficult to meet the ever-increasing demand for energy density[1]. 展开更多
关键词 All-solid-state batteries Lithium-rich manganese-based cathode Lithium-ion batteries High areal capacity Lithium metal batteries
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Nanosized Anatase TiO2 with Exposed(001)Facet for High-Capacity Mg2+Ion Storage in Magnesium Ion Batteries 认领 引用
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作者 Rong Li Liuyan Xia +6 位作者 Jili Yue Junhan Wu Xuxi Teng Jun Chen Guangsheng Huang Jingfeng Wang Fusheng Pan 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第1期438-457,共20页
Micro-sized anatase TiO2 displays inferior capacity as cathode material for magnesium ion batteries because of the higher diffusion energy barrier of Mg2+in anatase TiO2 lattice.Herein,we report that nanosize... Micro-sized anatase TiO2 displays inferior capacity as cathode material for magnesium ion batteries because of the higher diffusion energy barrier of Mg2+in anatase TiO2 lattice.Herein,we report that nanosized anatase TiO2 exposed(001)facet doubles the capacity compared to the micro-sized sample ascribed to the interfacial Mg2+ion storage.First-principles calculations reveal that the diffusion energy barrier of Mg2+on the(001)facet is significantly lower than those in the bulk phase and on(100)facet,and the adsorption energy of Mg2+on the(001)facet is also considerably lower than that on(100)facet,which guarantees superior interfacial Mg2+storage of(001)facet.Moreover,anatase TiO2 exposed(001)facet displays a significantly higher capacity of 312.9 mAh g−1 in Mg-Li dual-salt electrolyte compared to 234.3 mAh g−1 in Li salt electrolyte.The adsorption energies of Mg2+on(001)facet are much lower than the adsorption energies of Li+on(001)facet,implying that the Mg2+ion interfacial storage is more favorable.These results highlight that controlling the crystal facet of the nanocrystals effectively enhances the interfacial storage of multivalent ions.This work offers valuable guidance for the rational design of high-capacity storage systems. 展开更多
关键词 Magnesium ion batteries High capacity Nanosized anatase TiO2 Crystal facet Interfacial ion storage
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Numerical analysis of the effect of the gradation characteristics of soil particles on the ground bearing capacity of a rigid footing via the discrete element method 认领 引用
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作者 LIU Zong-qi CHEN Xi +2 位作者 CUI Liu-sheng XU Zhe YAN Zhi-kai 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第3期1387-1402,共16页
To underscore the overestimation of the ground bearing capacity by continuum-based numerical or analytical methods,the discrete element method(DEM),which may capture the microscopic characteristics of soil with graded... To underscore the overestimation of the ground bearing capacity by continuum-based numerical or analytical methods,the discrete element method(DEM),which may capture the microscopic characteristics of soil with graded particles,is used to study the ultimate bearing capacity of the ground(p u).In this work,the rolling resistance linear model of contact is implemented by the DEM for the soil,so the ultimate bearing capacity of the ground can be predicted.During the loading process in the DEM test,the development of a failure zone(or shear band)in the ground can be observed.Numerical experiments reveal that there is a certain negative linear relationship between the footing's ultimate rotation angle(αu)and p u,offering a novel perspective on the study of p u.Due to the asymmetry of the DEM ground,a new modification factorηp is defined for the ultimate bearing capacity.It is found that particularly for soils with a large mean particle size,narrow gradation or poor continuity of the particles,the effect of particle gradation characteristics on the ultimate bearing capacity should be appropriately evaluated. 展开更多
关键词 ultimate ground bearing capacity soil with graded particles discrete element method uneven settlement rotation of footing
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Optimal Allocation of Multiple Energy Storage Capacity in Industrial Park Considering Demand Response and Laddered Carbon Trading 认领 引用
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作者 Jingshuai Pang Songcen Wang +5 位作者 Hongyin Chen Xiaoqiang Jia YiGuo Ling Cheng Xinhe Zhang Jianfeng Li 《Energy Engineering》 EI 2026年第1期136-152,共17页
To achieve the goals of sustainable development of the energy system and the construction of a lowcarbon society,this study proposes a multi-energy storage collaborative optimization strategy for industrial park that ... To achieve the goals of sustainable development of the energy system and the construction of a lowcarbon society,this study proposes a multi-energy storage collaborative optimization strategy for industrial park that integrates the laddered carbon trading mechanism with demand response.Firstly,a dual dimensional DR model is constructed based on the characteristics of load elasticity.The alternativeDRenables flexible substitution of energy loads through complementary conversion of electricity/heat/cold multi-energy sources,while the price DR relies on timeof-use electricity price signals to guide load spatiotemporal migration;Secondly,the LCT mechanism is introduced to achieve optimal carbon emission costs through a tiered carbon quota allocation mechanism.On this basis,an optimization decision model is established with the core objective of maximizing the annual net profit of the park.The objective function takes into account energy sales revenue,generator unit costs,and investment and operation costs of multiple types of energy storage facilities.Themodel constraint system covers three key dimensions:dynamic operation constraints of power generation units,including unit output limits,ramping capability,and minimum start-stop time;the physical boundary of an electric/hot/cold multi-energy storage system involves energy storage capacity and charge/discharge efficiency;The multi-energy network coupling balance equation ensures that the energy conversion and transmission process satisfies the law of conservation of energy.Using CPLEX mathematical programming solver for simulation verification,construct an energy storage capacity configuration decision process that includes LCT-DR synergistic effect.The research results show that compared with the traditional single energy storage configuration mode,this strategy effectively enhances the economic feasibility and engineering practicality of industrial park operation by coordinating demand side resource scheduling and finely controlling carbon costs,while maintaining stable system operation.Its methodological framework provides a technical path that combines theoretical rigor and practical operability for the low-carbon transformation of regional integrated energy systems. 展开更多
关键词 Demand response laddered carbon trading combined cooling heating and power supply capacity configuration
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The primary sources of ROx radicals in atmosphere:Oxidative capacity and self-purifying effect 认领 引用
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作者 Gaojie Chen Ziyi Lin +5 位作者 Xiaoting Ji Lingling Xu Xiaolong Fan Mengren Li Youwei Hong Jinsheng Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期490-496,共7页
Ambient ozone(O3)is generated through the reactions of nitrogen oxides and volatile organic compounds(VOCs)in sunlight,and the primary sources of ROxradicals play a very important role in O3photochemistry.How... Ambient ozone(O3)is generated through the reactions of nitrogen oxides and volatile organic compounds(VOCs)in sunlight,and the primary sources of ROxradicals play a very important role in O3photochemistry.However,as major precursors of ROxradicals,the systematical evaluation of ClNO2,HCHO,and HONO impacts on O3photochemistry remains limited.Here,we utilized the observations of ClNO2,HCHO,and HONO conducted in a coastal city of Southeast China during a photochemical O3pollution episode,combined with model simulations to elucidate their impacts on ROxradicals and atmospheric oxidation capacity(AOC),as well as O3formation.Decreased concentrations of ClNO2and HONO were observed after sunrise,while HCHO concentrations peaked in the daytime.HCHO photolysis contributed the largest(∼25%)to ROxradical production around noon,while HONO photolysis(∼47%)dominated ROxradical production in the morning and late afternoon,and VOCs consumed by Cl radical released via ClNO2photolysis was more important(∼10%)in the early morning,similar to their effects on the AOC levels.The results of model simulations indicated that HCHO photolysis greatly enhanced the photochemical formation of O3,followed by HONO and ClNO2photolysis.Except for reducing VOCs due to a VOC-limited regime,the impacts of HCHO photolysis as primary ROxsources should be valued to inhibit the intensification of O3pollution.Our study stressed the importance of primary ROxsources for O3photochemistry in coastal regions,provided new insights into elucidating the self-purifying effect of the atmospheric environment. 展开更多
关键词 ROxradical chemistry O3photochemistry Atmospheric oxidation capacity Self-purifying effect
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Observational and modelled insights of volatile organic compounds into seasonal atmospheric oxidation capacity and radical chemistry over North China 认领 引用
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作者 Gen Zhang Jiyun Xian +6 位作者 Xue Yang Ouyang Li Guolan Fan Jinhe Wang Zhiyong Xia Luhong Gao Yanmei Jiang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期48-58,共11页
Volatile organic compounds(VOCs)regulate secondary pollutant formation by controlling both atmospheric oxidation capacity(AOC)intensity and ROx cycling efficiency.However,their dynamic mechanisms under varying seasona... Volatile organic compounds(VOCs)regulate secondary pollutant formation by controlling both atmospheric oxidation capacity(AOC)intensity and ROx cycling efficiency.However,their dynamic mechanisms under varying seasonal and pollution conditions remain poorly understood.In this study,the seasonal variations in AOC and radical chemistry under contrasting pollution scenarios were quantified based on the synchronized measurements of VOCs and other trace gases in Jinan,China.Severe ozone pollution was identified in summer with 8 h average ozone(O3)levels exceeding the Chinese national ambient air quality on 22 days(or 73.3%in frequency).Winter haze episodes(38.7%in frequency)exhibited significant PM2.5accumulation alongside pronounced VOCs enhancement.VOCs exhibited marked seasonal divergence:summer pollution depleted alkanes(-23%)but enriched oxygenated VOCs(OVOCs,+28%)through photochemical processing,whereas winter conditions amplified primary VOCs emissions.AOC confirmed summer dominance,with an average value of 1.6×107molecules/(cm3·s),exceeding winter AOC values by 7-8 folds.OH reactivity analysis further distinguished seasonal drivers,with OVOCs accounting for 34%of summer OH depletion versus NO2/CO-dominated consumption(61.2%)in winter.HCHO/OVOCs photolysis contributed 65%-89%to HO2/RO2production in summer(54%-56%in winter),whilst OH generation primarily originated from HONO photolysis(38%-44%in winter)and O3dissociation(59%-74%in summer).Summer pollution episodes intensified radical cycling,as evidenced via accelerated summer OH production rates during pollution days. 展开更多
关键词 Volatile organic compounds(VOCs) Atmospheric oxidation capacity(AOC) OH reactivity O3 ROx radicals
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Multi-objective land use simulation by integrating urban spatial suitability and ecological carrying capacity evaluations 认领 引用
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作者 CHEN Zeyin LI Siying +3 位作者 LIU Zheng HUO Yixin WU Tao ZHOU Xingang 《Journal of Geographical Sciences》 SCIE CSCD 2026年第4期799-824,共26页
Balancing urbanization with ecological carrying capacity is essential for sustainable urban development.Traditional land use prediction and urban growth boundary(UGB)delineation methods often overlook ecological asses... Balancing urbanization with ecological carrying capacity is essential for sustainable urban development.Traditional land use prediction and urban growth boundary(UGB)delineation methods often overlook ecological assessments and fail to address policy conflicts.This study proposes an integrated model combining urban spatial suitability(USS)and ecological carrying capacity(ECC)evaluations with cellular automata(CA)model to improve simulation accuracy and support scenario-based UGB delineation.First,we identify spatial variations in urban development potential under different scenarios by adjusting the weights of USS and ECC.Then,a multi-objective planning model is used to optimize the future land-use structure,maximizing overall benefits.Finally,the development potential and optimized land allocation are incorporated into the CA model to simulate future land use and delineate UGB for each scenario.Results show that integrating USS and ECC evaluations improves simulation accuracy,with the Kappa coefficient increasing from 0.836(with only USS evaluation)to 0.908 and overall accuracy reaching 94.1%.While the economic development scenario yields the highest economic benefits,a stronger emphasis on ECC produces more compact and spatially organized urban forms,characterized by higher aggregation and lower fragmentation.This framework provides a robust basis for multi-scenario urban simulation and offers valuable guidance for the scientific UGB delineation. 展开更多
关键词 land use prediction urban growth boundary cellular automata multi-scenario simulation urban spatial suitability ecological carrying capacity multi-objective planning
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Redox-active Ti3+/Ti4+substitution providing high ionic conductivity and extra electrochemical capacity for chloride electrolyte 认领 引用
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作者 Yeqing Shen Guoyao Li +2 位作者 Junduo Chen Hezhou Liu Huanan Duan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第7期141-151,I0005,共11页
The advancement of all-solid-state lithium batteries(ASSLBs)is significantly hindered by the trade-off between ionic conductivity and interfacial stability of solid-state electrolytes(SSEs).Chloride SSEs,particularly ... The advancement of all-solid-state lithium batteries(ASSLBs)is significantly hindered by the trade-off between ionic conductivity and interfacial stability of solid-state electrolytes(SSEs).Chloride SSEs,particularly Li2ZrCl6,offer high oxidation stability but suffer from moderate ionic conductivity and intrinsic instability against lithium metal.This work,by introducing redox-active aliovalent substituents,attempts to addess these interconnected challenges and endow extra electrochemical capacity for chloride electrolytes.Specifically,Li2+4xZr1-4xTi3xAlxCl6(4x=0.15)exhibits enhanced ionic conductivity(0.87 mS cm-1)and low activation energy(0.218 eV).Interestingly,cyclic voltammetry and X-ray photoelectron spectroscopy tests confirm that the incorporated Ti3+ions serve as reversible redox centers(Ti3+/Ti4+),providing the chloride electrolyte an extra specific capacity of 9.68 mAh g-1.This transforms the SSE from an ion conductor into a capacity contributor.Furthermore,by designing a Li5.4PS4.4Cl1.6(LPSC)-Li2+4xZr1-4xTi3xAlxCl6bilayer electrolyte,the chloride acts as an“anchor”layer to effectively suppress the dendrite propagation,enabling the symmetric lithium cell to cycle stably at 0.6 mA cm-2.When assembled into ASSLBs with LiNi0.8Mn0.1Co0.1O2(NMC811)cathode and Li anode,the battery delivers a high specific capacity of 185.30 mAh g-1at 0.05 C,demonstrating superior rate capability and cycling stability(84.12%capacity retention after 120 cycles at 0.2 C)compared with the unsubstituted chloride.This work presents a paradigm-shifting approach to designing redox-active,high-performance chloride SSEs,paving a new avenue for developing high-energy-density ASSLBs. 展开更多
关键词 All-solid-state lithium batteries Li2ZrCl6electrolyte Conductivity enhancement Lithium metal compatibility Composite cathode capacity
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Heterogeneous global responses of dust to wildfires explained by ecosystems’differing moisture-holding capacity 认领 引用
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作者 Qianqian Yang Meng Gao 《Science Bulletin》 SCIE EI CAS CSCD 2026年第12期2986-2990,共5页
Mineral dust ranks among the most prevalent aerosols globally by mass[1],representing a substantial environmental concern with broad impacts on human health[2],biogeochemical processes[3],and the climate system[1].Dus... Mineral dust ranks among the most prevalent aerosols globally by mass[1],representing a substantial environmental concern with broad impacts on human health[2],biogeochemical processes[3],and the climate system[1].Dust emissions originate from natural desert areas,characterized by sparse vegetation and easily erodible surfaces that facilitate particle mobilization,as well as from anthropogenically disturbed regions,affected by agricultural expansion,overgrazing,and deforestation. 展开更多
关键词 mineral dust ecosystems aerosols anthropogenically disturbed regionsaffected dust emissions moisture holding capacity environmental concern human health
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