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Investigation on the resonance phenomena of multi-solitons for the (3+1)-dimensional Kadomtsev-Petviashvili equation 被引量:1
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作者 石玉仁 张娟 +2 位作者 杨红娟 段文山 Karl E.Lonngren 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第1期473-478,共6页
In this paper, we theoretically investigate the four-soliton interaction and their resonance phenomena of the (3+1)- dimensional Kadomtsev Petviashvili (KP) equation. We find that the maximum amplitude of the res... In this paper, we theoretically investigate the four-soliton interaction and their resonance phenomena of the (3+1)- dimensional Kadomtsev Petviashvili (KP) equation. We find that the maximum amplitude of the resonantly created soliton can be 16 times that of one of the four equi-amplitude initial interacting solitons. We also find that the maximum amplitude can only be 4 times the initial soliton amplitude when the resonance phenomena does not take place. The case of four solitons with different amplitudes also has been studied analytically. The results indicate that the resonance phenomena still exists in this case. Numerical results confirm the theoretical predictions. 展开更多
关键词 Kadomtsev-Petviashvili equation SOLITON RESONANCE
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Advancing sustainable chemistry through organic electrosynthesis:a perspective
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作者 Yatao Wang Jiayu Hu +1 位作者 Li Zeng Aiwen Lei 《Science China Chemistry》 2026年第2期640-658,共19页
Due to the advantages of green and sustainable chemistry,electrochemistry has attracted considerable interest from researchers in both academia and industry.Organic electrosynthesis has become a revolutionary strategy... Due to the advantages of green and sustainable chemistry,electrochemistry has attracted considerable interest from researchers in both academia and industry.Organic electrosynthesis has become a revolutionary strategy,which offers a greener and more energy-efficient option for traditional organic synthesis.This mini review summarizes examples of organic electrosynthesis that highlight the unique potential of organic electrosynthesis in asymmetric electrocatalysis,photoelectrocatalysis,heterogeneous electrocatalysis,and alternating current electrolysis,aiming to stimulate future progress in this rapidly evolving area. 展开更多
关键词 alternating current asymmetric catalysis PHOTOELECTROCHEMISTRY heterogeneous electrocatalysis
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A numerical study on wind-driven runback characteristics of a thin water film flow over a solid surface
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作者 Jincheng Wang Ping He Hui Hu 《Acta Mechanica Sinica》 2026年第1期64-72,共9页
An unsteady numerical simulation is conducted to examine the dynamic runback characteristics of a water film flow driven by a boundary layer airflow over a solid surface pertinent to the dynamic glaze ice accretion pr... An unsteady numerical simulation is conducted to examine the dynamic runback characteristics of a water film flow driven by a boundary layer airflow over a solid surface pertinent to the dynamic glaze ice accretion process over aircraft wing surfaces.The multiphase flow simulation results of the wind-driven water runback(WDWR)flow are compared quantitatively with the experimental results in terms of the time-dependent variations of the water film thickness profiles and evolution of the front contact point of the runback water film flow.The underlying mechanism of the intermittent water runback behavior is elucidated by analyzing the time evolution of the airflow velocity and vorticity fields above the runback water film flow over the solid surface.To the best knowledge of the authors,the work presented here is the first successful attempt to numerically examine the transient runback characteristics of WDWR flows.It serves as an excellent benchmark case for the development of best practices to model the important micro-physical processes responsible for the transient water transport over aircraft wing surfaces. 展开更多
关键词 Multiphase flow simulation Water transport over wing surfaces Glaze ice accretion process Volume of fluid method
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Enhanced BEV Scene Segmentation:De-Noise Channel Attention for Resource-Constrained Environments
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作者 Argho Dey Yunfei Yin +3 位作者 Zheng Yuan ZhiwenZeng Xianjian Bao Md Minhazul Islam 《Computers, Materials & Continua》 2026年第4期2161-2180,共20页
Autonomous vehicles rely heavily on accurate and efficient scene segmentation for safe navigation and efficient operations.Traditional Bird’s Eye View(BEV)methods on semantic scene segmentation,which leverage multimo... Autonomous vehicles rely heavily on accurate and efficient scene segmentation for safe navigation and efficient operations.Traditional Bird’s Eye View(BEV)methods on semantic scene segmentation,which leverage multimodal sensor fusion,often struggle with noisy data and demand high-performance GPUs,leading to sensor misalignment and performance degradation.This paper introduces an Enhanced Channel Attention BEV(ECABEV),a novel approach designed to address the challenges under insufficient GPU memory conditions.ECABEV integrates camera and radar data through a de-noise enhanced channel attention mechanism,which utilizes global average and max pooling to effectively filter out noise while preserving discriminative features.Furthermore,an improved fusion approach is proposed to efficiently merge categorical data across modalities.To reduce computational overhead,a bilinear interpolation layer normalizationmethod is devised to ensure spatial feature fidelity.Moreover,a scalable crossentropy loss function is further designed to handle the imbalanced classes with less computational efficiency sacrifice.Extensive experiments on the nuScenes dataset demonstrate that ECABEV achieves state-of-the-art performance with an IoU of 39.961,using a lightweight ViT-B/14 backbone and lower resolution(224×224).Our approach highlights its cost-effectiveness and practical applicability,even on low-end devices.The code is publicly available at:https://github.com/YYF-CQU/ECABEV.git. 展开更多
关键词 Autonomous vehicle BEV attention mechanism sensor fusion scene segmentation
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Robotic-assisted donor and recipient hepatectomy in liver transplantation:An umbrella review of clinical outcomes,surgical performance,and cost-effectiveness
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作者 Carlos M Ardila Daniel González-Arroyave Jaime Ramírez-Arbelaez 《World Journal of Transplantation》 2026年第1期223-238,共16页
BACKGROUND Robotic assistance is increasingly used for donor and recipient hepatectomy in liver transplantation,yet existing evidence is fragmented and variably indirect.AIM To evaluate clinical outcomes,surgical perf... BACKGROUND Robotic assistance is increasingly used for donor and recipient hepatectomy in liver transplantation,yet existing evidence is fragmented and variably indirect.AIM To evaluate clinical outcomes,surgical performance,and economic effects of robotic-assisted donor and recipient hepatectomy in the transplant pathway.METHODS Following Preferred Reporting Items for Systematic reviews and Meta-Analyses 2020 and a priori registration,systematic reviews were included with or without meta-analysis.Four databases were searched through July 2025.Methodological quality was appraised with a measurement tool to assess systematic reviews(AMSTAR 2),and certainty was graded with grading of recommendations assessment,development and evaluation(GRADE).Evidence overlap was calculated via a citation-matrix-based corrected covered area(CCA).Effect sizes were prespecified as risk ratios(RR)for dichotomous outcomes and mean differences for continuous outcomes.RESULTS Five reviews met the inclusion criteria,four with meta-analyses and one consensus review used only for context.Donor(direct)findings were more favorable for robotics in terms of estimated blood loss(≈-117 mL)and length of stay(≈-0.6 days),although with longer operative time(≈+105 minutes).Absolute risks for donor complications were not estimable from ratio-only data.Recipient(indirect)meta-analysis indicated robotics to be favorable in terms of conversion(RR≈0.41)and severe morbidity(RR≈0.81),with a trend toward lower overall morbidity(RR≈0.92)and no difference in 30-day mortality.Differences in length of stay and operative time were small and heterogeneous.Economic evidence(indirect,network meta-analysis)suggested higher procedural costs for robotic vs laparoscopic intervention,but lower hospitalization costs vs open intervention,with laparoscopy the least expensive overall.AMSTAR 2 ratings were moderate-to-high across the reviews,GRADE certainty was low for key donor continuous outcomes,and low-to-moderate for recipient and economic outcomes.Overlap was slight(graded-corpus CCA=0.0%;including a contextual non-transplant review increased CCA to≈1.25%).CONCLUSION Robotic donor hepatectomy confers perioperative advantages at the cost of longer operative time.Recipient and economic findings are indirect and considered hypothesis-generating.Transplant-specific,prospective comparisons using a minimum standardized dataset and uniform outcome definitions are needed to resolve remaining uncertainties and to clarify the cost-utility correlation. 展开更多
关键词 Robotic-assisted surgery HEPATECTOMY Liver transplantation Living donor Surgical outcomes COST-EFFECTIVENESS Minimally invasive surgery Systematic review Meta-analysis
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Hybrid Pythagorean Fuzzy Decision-Making Framework for Sustainable Urban Planning under Uncertainty
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作者 Sana Shahab Vladimir Simic +2 位作者 Ashit Kumar Dutta Mohd Anjum Dragan Pamucar 《Computer Modeling in Engineering & Sciences》 2026年第1期892-925,共34页
Environmental problems are intensifying due to the rapid growth of the population,industry,and urban infrastructure.This expansion has resulted in increased air and water pollution,intensified urban heat island effect... Environmental problems are intensifying due to the rapid growth of the population,industry,and urban infrastructure.This expansion has resulted in increased air and water pollution,intensified urban heat island effects,and greater runoff from parks and other green spaces.Addressing these challenges requires prioritizing green infrastructure and other sustainable urban development strategies.This study introduces a novel Integrated Decision Support System that combines Pythagorean Fuzzy Sets with the Advanced Alternative Ranking Order Method allowing for Two-Step Normalization(AAROM-TN),enhanced by a dual weighting strategy.The weighting approach integrates the Criteria Importance Through Intercriteria Correlation(CRITIC)method with the Criteria Importance through Means and Standard Deviation(CIMAS)technique.The originality of the proposed framework lies in its ability to objectively quantify criteria importance using CRITIC,incorporate decision-makers’preferences through CIMAS,and capture the uncertainty and hesitation inherent in human judgment via Pythagorean Fuzzy Sets.A case study evaluating green infrastructure alternatives in metropolitan regions demonstrates the applicability and effectiveness of the framework.A sensitivity analysis is conducted to examine how variations in criteria weights affect the rankings and to evaluate the robustness of the results.Furthermore,a comparative analysis highlights the practical and financial implications of each alternative by assessing their respective strengths and weaknesses. 展开更多
关键词 Sustainable urban planning criterion importance assessment two-step normalization environmental impact decision-making
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Utility of endoscopic ultrasound in pancreatitis:A review 被引量:2
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作者 Maged K Rizk Henning Gerke 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第47期6321-6326,共6页
The close proximity of the endoscopic ultrasound probe to the pancreas results in superior spatial resolution compared to CT scan and MRI. In addition, endoscopic ultrasound (EUS) is a minimally invasive procedure tha... The close proximity of the endoscopic ultrasound probe to the pancreas results in superior spatial resolution compared to CT scan and MRI. In addition, endoscopic ultrasound (EUS) is a minimally invasive procedure that does not share the relatively high complication rate of ERCP. Due to these advantages, EUS has evolved into an important technique to assess pancreatobiliary disease. This review will discuss the role of EUS in patients with pancreatitis. The indications can be divided into acute pancreatitis and chronic pancreatitis. In acute pancreatitis, EUS is used to determine the etiology; in suspected chronic pancreatitis it is helpful to establish the diagnosis. Lastly, this review will discuss biliary pancreatitis with suspicion for persistent choledocholithiasis. 展开更多
关键词 Idiopathic pancreatitis Acute pancreatitis Chronic pancreatitis Endsocopic ultrasound ENDOSONOGRAPHY Pancreas divisum CHOLELITHIASIS MICROLITHIASIS CHOLEDOCHOLITHIASIS Biliary pancreatitis
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Regulator of G protein signaling 6 mediates exercise-induced recovery of hippocampal neurogenesis,learning,and memory in a mouse model of Alzheimer’s disease 被引量:1
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作者 Mackenzie M.Spicer Jianqi Yang +5 位作者 Daniel Fu Alison N.DeVore Marisol Lauffer Nilufer S.Atasoy Deniz Atasoy Rory A.Fisher 《Neural Regeneration Research》 SCIE CAS 2025年第10期2969-2981,共13页
Hippocampal neuronal loss causes cognitive dysfunction in Alzheimer’s disease.Adult hippocampal neurogenesis is reduced in patients with Alzheimer’s disease.Exercise stimulates adult hippocampal neurogenesis in rode... Hippocampal neuronal loss causes cognitive dysfunction in Alzheimer’s disease.Adult hippocampal neurogenesis is reduced in patients with Alzheimer’s disease.Exercise stimulates adult hippocampal neurogenesis in rodents and improves memory and slows cognitive decline in patients with Alzheimer’s disease.However,the molecular pathways for exercise-induced adult hippocampal neurogenesis and improved cognition in Alzheimer’s disease are poorly understood.Recently,regulator of G protein signaling 6(RGS6)was identified as the mediator of voluntary running-induced adult hippocampal neurogenesis in mice.Here,we generated novel RGS6fl/fl;APP_(SWE) mice and used retroviral approaches to examine the impact of RGS6 deletion from dentate gyrus neuronal progenitor cells on voluntary running-induced adult hippocampal neurogenesis and cognition in an amyloid-based Alzheimer’s disease mouse model.We found that voluntary running in APP_(SWE) mice restored their hippocampal cognitive impairments to that of control mice.This cognitive rescue was abolished by RGS6 deletion in dentate gyrus neuronal progenitor cells,which also abolished running-mediated increases in adult hippocampal neurogenesis.Adult hippocampal neurogenesis was reduced in sedentary APP_(SWE) mice versus control mice,with basal adult hippocampal neurogenesis reduced by RGS6 deletion in dentate gyrus neural precursor cells.RGS6 was expressed in neurons within the dentate gyrus of patients with Alzheimer’s disease with significant loss of these RGS6-expressing neurons.Thus,RGS6 mediated voluntary running-induced rescue of impaired cognition and adult hippocampal neurogenesis in APP_(SWE) mice,identifying RGS6 in dentate gyrus neural precursor cells as a possible therapeutic target in Alzheimer’s disease. 展开更多
关键词 adult hippocampal neurogenesis Alzheimer’s disease dentate gyrus EXERCISE learning/memory neural precursor cells regulator of G protein signaling 6(RGS6)
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The Qixiangzhan Lava Flow at the Tianchi Volcano:Eruptive Dynamics,Emplacement Mechanism and Implications for the Formation of Long-lived Magmatic Systems Prior to Caldera-forming Eruptions 被引量:1
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作者 LI Jiahui SHAN Xuanlong +5 位作者 YI Jian WU Chengzhi Ventura GUIDO LIU Pengcheng GUO Jiannan WANG Wei 《Acta Geologica Sinica(English Edition)》 2025年第1期114-125,共12页
The 7 ka old Qixiangzhan lava flow(QXZ,Tianchi volcano)represents the last eruptive event before the 946 CE,caldera-forming‘Millennium’eruption(ME).Petrographic,whole rock,mineral composition,Sr-Nd isotopic data on ... The 7 ka old Qixiangzhan lava flow(QXZ,Tianchi volcano)represents the last eruptive event before the 946 CE,caldera-forming‘Millennium’eruption(ME).Petrographic,whole rock,mineral composition,Sr-Nd isotopic data on QXZ show that:(a)the lava consists of two components,constituted by comenditic obsidian fragments immersed in a continuous,aphanitic component;(b)both components have the same geochemical and isotopic variations of the ME magma.The QXZ and ME comendites result from fractional crystallization and crustal assimilation processes.The temperature of the QXZ magma was about 790℃ and the depth of the magma reservoir around 7 km,the same values as estimated for ME.QXZ had a viscosity of 10^(5.5)-10^(9) Pa s and a velocity of 3-10 km/yr.The emplacement time was 0.5-1.6yr and the flow rate 0.48-1.50 m^(3)/s.These values lie within the range estimated for other rhyolitic flows worldwide.The QXZ lava originated through a mixed explosive-effusive activity with the obsidian resulting from the ascent of undercooling,degassing and the fragmentation of magma along the conduit walls,whereas the aphanitic component testifies to the less undercooled and segregated flow at the center of the conduit.The QXZ lava demonstrates the extensive history of the ME magma chamber. 展开更多
关键词 lava flow rhyolitic volcanism eruptive mechanism long-lived magmatic systems Tianchi volcano Qixiangzhan Formation
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Community dynamics during de novo colonization of the nascent peri-implant sulcus 被引量:1
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作者 Tamires Pereira Dutra Nicolas Robitaille +2 位作者 Khaled Altabtbaei Shareef M.Dabdoub Purnima S.Kumar 《International Journal of Oral Science》 2025年第3期361-367,共7页
Dental implants have restored masticatory function to over 100000000 individuals,yet almost 1000000 implants fail each year due to peri-implantitis,a disease triggered by peri-implant microbial dysbiosis.Our ability t... Dental implants have restored masticatory function to over 100000000 individuals,yet almost 1000000 implants fail each year due to peri-implantitis,a disease triggered by peri-implant microbial dysbiosis.Our ability to prevent and treat peri-implantitis is hampered by a paucity of knowledge of how these biomes are acquired and the factors that engender normobiosis.Therefore,we combined a 3-month interventional study of 15 systemically and periodontally healthy adults with whole genome sequencing,finescale enumeration and graph theoretics to interrogate colonization dynamics in the pristine peri-implant sulcus.We discovered that colonization trajectories of implants differ substantially from adjoining teeth in acquisition of new members and development of functional synergies.Source-tracking algorithms revealed that this niche is initially seeded by bacteria trapped within the coverscrew chamber during implant placement.These pioneer species stably colonize the microbiome and exert a sustained influence on the ecosystem by serving as anchors of influential hubs and by providing functions that enable cell replication and biofilm maturation.Unlike the periodontal microbiome,recruitment of new members to the peri-implant community occurs on nepotistic principles.Maturation is accompanied by a progressive increase in anaerobiosis,however,the predominant functionalities are oxygen-dependent over the 12-weeks.The peri-implant community is easily perturbed following crown placement,but demonstrates remarkable resilience;returning to pre-perturbation states within three weeks.This study highlights important differences in the development of the periodontal and peri-implant ecosystems,and signposts the importance of placing implants in periodontally healthy individuals or following the successful resolution of periodontal disease. 展开更多
关键词 whole genome sequencingfinescale enu masticatory function microbial dysbiosis de novo colonization peri implantitis dental implants peri implant sulcus whole genome sequencing
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Temperature-dependent competition between dislocation motion and phase transition in CdTe 被引量:1
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作者 Jun Li Kun Luo Qi An 《Journal of Materials Science & Technology》 2025年第23期109-121,共13页
The plastic deformation of semiconductors,a process critical to their mechanical and electronic properties,involves various mechanisms such as dislocation motion and phase transition.Here,we systematically examined th... The plastic deformation of semiconductors,a process critical to their mechanical and electronic properties,involves various mechanisms such as dislocation motion and phase transition.Here,we systematically examined the temperature-dependent Peierls stress for 30°and 90°partial dislocations in cadmium telluride(CdTe),using a combination of molecular statics and molecular dynamics simulations with a machine-learning force field,as well as density functional theory simulations.Our findings reveal that the 0 K Peierls stresses for these partial dislocations in CdTe are relatively low,ranging from 0.52 GPa to 1.46 GPa,due to its significant ionic bonding characteristics.Notably,in the CdTe system containing either a 30°Cd-core or 90°Te-core partial dislocation,a phase transition from the zinc-blende phase to theβ-Sn-like phase is favored over dislocation motion.This suggests a competitive relationship between these two mechanisms,driven by the bonding characteristics within the dislocation core and the relatively low phase transition stress of∼1.00 GPa.Furthermore,we observed a general trend wherein the Peierls stress for partial dislocations in CdTe exhibits a temperature dependence,which decreases with increasing temperature,becoming lower than the phase transition stress at elevated temperatures.Consequently,the dominant deformation mechanism in CdTe shifts from solid-state phase transition at low temperatures to dislocation motion at high temperatures.This investigation uncovers a compelling interplay between dislocation motion and phase transition in the plastic deformation of CdTe,offering profound insights into the mechanical behavior and electronic performance of CdTe and other II-VI semiconductors. 展开更多
关键词 CDTE Peierls stress Dislocation motion Solid-state phase transition Machine-learning force field
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Enhancing Solar Photovoltaic Efficiency:A Computational Fluid Dynamics Analysis 被引量:1
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作者 Rahool Rai Fareed Hussain Mangi +1 位作者 Kashif Ahmed Sudhakar Kumaramsay 《Energy Engineering》 EI 2025年第1期153-166,共14页
The growing need for sustainable energy solutions,driven by rising energy shortages,environmental concerns,and the depletion of conventional energy sources,has led to a significant focus on renewable energy.Solar ener... The growing need for sustainable energy solutions,driven by rising energy shortages,environmental concerns,and the depletion of conventional energy sources,has led to a significant focus on renewable energy.Solar energy,among the various renewable sources,is particularly appealing due to its abundant availability.However,the efficiency of commercial solar photovoltaic(PV)modules is hindered by several factors,notably their conversion efficiency,which averages around 19%.This efficiency can further decline to 10%–16%due to temperature increases during peak sunlight hours.This study investigates the cooling of PV modules by applying water to their front surface through Computational fluid dynamics(CFD).The study aimed to determine the optimal conditions for cooling the PV module by analyzing the interplay between water film thickness,Reynolds number,and their effects on temperature reduction and heat transfer.The CFD analysis revealed that the most effective cooling condition occurred with a 5 mm thick water film and a Reynolds number of 10.These specific parameters were found to maximize the heat transfer and temperature reduction efficiency.This finding is crucial for the development of practical and efficient cooling systems for PV modules,potentially leading to improved performance and longevity of solar panels.Alternative cooling fluids or advanced cooling techniques that might offer even better efficiency or practical benefits. 展开更多
关键词 PV module efficiency water film thickness reynolds number CFD analysis PV/T renewable energy
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Advances in the use of carbon materials for lithium-air batteries
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作者 LEI Yu ZHONG Yu +3 位作者 LI Yi-shuo LI Tao ZHOU Zhuo-hui QIN Lei 《新型炭材料(中英文)》 北大核心 2025年第4期909-930,共22页
Lithium-air batteries(LABs)are regarded as a next-generation energy storage option due to their relatively high energy density.The cyclic stability and lifespan of LABs are mainly influenced by the formation and decom... Lithium-air batteries(LABs)are regarded as a next-generation energy storage option due to their relatively high energy density.The cyclic stability and lifespan of LABs are mainly influenced by the formation and decomposition of lithium-based oxides at the air cathode,which not only lead to a low cathode catalytic efficiency but also restrict the electrochemical reversibility and cause side reaction problems.Carbon materials are considered key to solving these problems due to their conductivity,functional flexibility,and adjustable pore structure.This paper considers the research progress on carbon materials as air cathode catalytic materials for LABs,focusing on their structural characteristics,electrochemical behavior,and reaction mechanisms.Besides being used as air cathodes,carbon materials also show potential for being used as protective layers for metal anodes or as anode materials for LABs. 展开更多
关键词 Lithium-air battery Carbon materials Air cathode Modified carbon electrode Oxygen crossover
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Nickel nanoparticles catalyzed hydrogenation and deuteration for a general amine synthesis
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作者 Xiaofei Wang Yan Li +4 位作者 Mengyun Wang Yiming Gao Zhuang Ma Aiwen Lei Wu Li 《Chinese Journal of Catalysis》 2025年第5期392-401,共10页
Amines represent fundamental motifs in various chemical contexts and are widely used in agrochemicals and pharmaceuticals.The development of earth-abundant metal-based heterogeneous catalysts for the synthesis amines ... Amines represent fundamental motifs in various chemical contexts and are widely used in agrochemicals and pharmaceuticals.The development of earth-abundant metal-based heterogeneous catalysts for the synthesis amines remains an important goal in terms of chemical research and industrial application/manufacture.Herein,we developed an efficient and highly selective nitrogen-doped nickel catalyst enriched with Lewis acid sites,which has been applied for to the hydrogenative coupling of nitriles and amines with molecular hydrogen for the synthesis of a train of functionalised and structurally diverse secondary and tertiary amines.Furthermore,catalytic hydrogenation and deuteration of nitriles were achieved under milder conditions,yielding a series of primary amines and deuterated amines with high deuterium incorporation. 展开更多
关键词 Nitrogen-doped nano-nickel catalysis Hydrogenative coupling reaction Catalytic hydrogenation and DEUTERATION Amines and deuterated amines
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The Ethical Nature of Strategic Ambiguity in Organizational Communication
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作者 Livia Durac 《Philosophy Study》 2025年第6期444-453,共10页
Strategic ambiguity came to the attention of researchers specializing in organizational issues a few decades ago,attracting both adherents and opponents.An inherent part of the communication process,strategic clarity ... Strategic ambiguity came to the attention of researchers specializing in organizational issues a few decades ago,attracting both adherents and opponents.An inherent part of the communication process,strategic clarity emerged as a result of strategic thinking,against the challenging background of the need for change,imposed by organizational dynamics.As a communication strategy,the roles of discursive ambiguity refer,among others,to its use in strategy documents,in the plan of relations with other institutional entities,etc.some ethical reflections on this form of communication. 展开更多
关键词 strategic ambiguity CLARITY organization ETHICS
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Regulating the coordination of solvent molecules with K salts for non-flammable and durable potassium-ion batteries with allaluminum current collectors
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作者 Yishuo Li Xinyang Zhang +4 位作者 Wenjun Cai Xiaojuan Chen Fei Xie Dexin Zhu Lei Qin 《Energy Materials and Devices》 2025年第3期14-29,共16页
The full utilization of affordable potassium-ion batteries(PIBs)based on all-aluminum current collectors is hindered by low specific energy,limited lifespan,and safety concerns,primarily due to the lack of suitable el... The full utilization of affordable potassium-ion batteries(PIBs)based on all-aluminum current collectors is hindered by low specific energy,limited lifespan,and safety concerns,primarily due to the lack of suitable electrolytes for high-capacity electrodes.This work introduces new molecular insights,from bulk solvation chemistry to interfacial behaviors,for designing compatible electrolytes.Fluorinated triethyl phosphate(FTEP)of tris(2,2,2-trifluoroethyl)phosphate was strategically selected as a low-polarity solvating solvent to create an anion-rich solvation sheath,albeit with reduced ion mobility at moderate concentration(1.0 mol·L^(−1)).The deficiency of solvating-solvent molecules in the primary solvation sheath facilitates the formation of a protective layer derived from bis(fluorosulfonyl)imide anion decomposition,ultimately inhibiting undesirable side reactions at electrode/electrolyte interfaces.Moreover,FTEP as the sole solvating solvent endows the electrolyte with exceptional flame retardancy.The results provide crucial insights into the role of solvation chemistry on solvation structure and interfacial transport dynamics,critical for advancing the development of compatible electrolytes for high-performance PIBs. 展开更多
关键词 interfacial chemistry solvation structure potassium battery non-flammability aluminum current collector
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A general synthesis of gem-difluorobicyclo[2.1.1]hexanes
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作者 Mengyu Wu Kewei Ren +4 位作者 Chengyu Zou Jiacheng Chen Rui Ma Chuan Zhu Chao Feng 《Chinese Chemical Letters》 2025年第5期225-230,共6页
Bridged bicyclic cores have been recognized as valuable bioisosteres of benzene ring,which are of great value in medicinal chemistry.However,the development of fluorinated bicyclic skeletons,which encompass two privil... Bridged bicyclic cores have been recognized as valuable bioisosteres of benzene ring,which are of great value in medicinal chemistry.However,the development of fluorinated bicyclic skeletons,which encompass two privileged elements widely acknowledged for fine tuning the working effect of target molecules,are far less common.Herein,we present a general and practical synthesis of gem-difluorobicyclo[2.1.1]hexanes(diF-BCHs)from readily available difluorinated hexa-1,5-dienes through energy transfer photocatalysis.By taking advantage of an efficient Cope rearrangement,the preparation of both constitutional isomers of diF-BCHs is readily achieved under identical conditions.The operational simplicity,mild conditions and wide scope further highlight the potential application of this protocol.Moreover,computational studies indicated a positive effect of fluorine atoms in lowering either the triplet or FMO energies of the hexa-1,5-diene substrates,thus promoting the present photoinduced[2+2]cycloaddition. 展开更多
关键词 gem-Difluorobicyclo[2.1.1]hexanes Visible-light phototcatalysis Energy transfer [2+2]Cycloaddition Fluorine effects
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Giving urine biochemistry a second chance in acute kidney injury monitoring
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作者 Alexandre Toledo Maciel 《World Journal of Critical Care Medicine》 2025年第4期1-7,共7页
Most studies assessing urine biochemistry for acute kidney injury(AKI)monitoring rely on paradigms from the 1970s.It was proposed that a single measurement of urinary parameters in the presence of increased serum crea... Most studies assessing urine biochemistry for acute kidney injury(AKI)monitoring rely on paradigms from the 1970s.It was proposed that a single measurement of urinary parameters in the presence of increased serum creatinine(sCr)could help understand AKI pathophysiology and predict its duration.However,those studies produced variable and controversial results.Recently,an alternative“urine biochemical approach”has been proposed.In contrast with the traditional approach,it includes sequential urine electrolyte assessment,evaluation before AKI diagnosis,and interpretation of avid sodium retention as a marker of renal microcirculatory stress instead of low renal perfusion.This review highlights the rationale of this alternative approach,which is focused on early urinary biochemical changes that precede increases in sCr as well as signs of renal recovery before decreases in sCr.The relevance of urine composition in conjunction with urine volume for a proper evaluation of renal function is emphasized.This new approach aims to enhance the utility of urinary biochemical parameters in AKI monitoring,particularly in patients who are critically ill. 展开更多
关键词 Urine biochemistry Urine electrolytes Acute kidney injury MONITORING Urine biochemical approach Fractional excretion of potassium Urinary potassium/urinary creatinine concentration ratio Urinary sodium concentration Excreted mass of creatinine
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Modeling segregated solutes in plastically deformed alloys using coupled molecular dynamics-Monte Carlo simulations
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作者 Hariprasath Ganesan Godehard Sutmann 《Journal of Materials Science & Technology》 2025年第10期98-108,共11页
A microscopic understanding of the complex solute-defect interaction is pivotal for optimizing the alloy’s macroscopic mechanical properties.Simulating solute segregation in a plastically deformed crystalline system ... A microscopic understanding of the complex solute-defect interaction is pivotal for optimizing the alloy’s macroscopic mechanical properties.Simulating solute segregation in a plastically deformed crystalline system at atomic resolution remains challenging.The objective is to efficiently model and predict a phys-ically informed segregated solute distribution rather than simulating a series of diffusion kinetics.To ad-dress this objective,we coupled molecular dynamics(MD)and Monte Carlo(MC)methods using a novel method based on virtual atoms technique.We applied our MD-MC coupling approach to model off-lattice carbon(C)solute segregation in nanoindented Fe-C samples containing complex dislocation networks.Our coupling framework yielded the final configuration through efficient parallelization and localized en-ergy computations,showing C Cottrell atmospheres near dislocations.Different initial C concentrations resulted in a consistent trend of C atoms migrating from less crystalline distortion to high crystalline distortion regions.Besides unraveling the strong spatial correlation between local C concentration and defect regions,our results revealed two crucial aspects of solute segregation preferences:(1)defect ener-getics hierarchy and(2)tensile strain fields near dislocations.The proposed approach is generic and can be applied to other material systems as well. 展开更多
关键词 Molecular dynamics Monte Carlo Virtual atoms Solute segregation Cottrell atmosphere Off-lattice
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Breed‑specific responses to coccidiosis in chickens:identification of intestinal bacteria linked to disease resistance
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作者 Chace Broadwater Jiaqing Guo +5 位作者 Jing Liu Isabel Tobin Melanie A.Whitmore Michael G.Kaiser Susan J.Lamont Guolong Zhang 《Journal of Animal Science and Biotechnology》 2025年第5期2106-2119,共14页
Background Coccidiosis,caused by Eimeria parasites,is a major enteric disease in poultry,significantly impacting animal health,production performance,and welfare.This disease imposes a substantial economic burden,cost... Background Coccidiosis,caused by Eimeria parasites,is a major enteric disease in poultry,significantly impacting animal health,production performance,and welfare.This disease imposes a substantial economic burden,costing the global poultry industry up to$13 billion annually.However,effective mitigation strategies for coccidiosis remain elusive.While different chicken breeds exhibit varying resistance to coccidiosis,no commensal bacteria have been directly linked to this resistance.Methods To assess relative resistance of different breeds to coccidiosis,10-day-old Fayoumi M5.1,Leghorn Ghs6,and Cobb chickens were challenged with 50,000 sporulated Eimeria maxima oocysts or mock-infected.Body weight changes,small intestinal lesions,and fecal oocyst shedding were evaluated on d 17.Ileal and cecal digesta were collected from individual animals on d 17 and subjected to microbiome analysis using 16S rRNA gene sequencing.Results Fayoumi M5.1 chickens showed the lowest growth retardation,intestinal lesion score,fecal oocyst shedding,and pathobiont proliferation compared to Ghs6 and Cobb chickens.The intestinal microbiota of M5.1 chickens also differed markedly from the other two breeds under both healthy and coccidiosis conditions.Notably,group A Lactobacillus and Ligilactobacillus salivarius were the least prevalent in both the ileum and cecum of healthy M5.1 chickens,but became highly enriched and comparable to Ghs6 and Cobb chickens in response to coccidiosis.Conversely,Weissella,Staphylococcus gallinarum,and Enterococcus durans/hirae were more abundant in the ileum of healthy M5.1 chickens than in the other two breeds.Despite being reduced by Eimeria,these bacteria retained higher abundance in M5.1 chickens compared to the other breeds.Conclusions Fayoumi M5.1 chickens exhibit greater resistance to coccidiosis than Leghorn Ghs6 layers and Cobb broilers.Several commensal bacteria,including group A Lactobacillus,L.salivarius,Weissella,S.gallinarum,and E.durans/hirae,are differentially enriched in Fayoumi M5.1 chickens with strong correlation with coccidiosis resistance.These bacteria hold potential as probiotics for coccidiosis mitigation. 展开更多
关键词 COCCIDIOSIS EIMERIA ENTEROCOCCUS Fayoumi Lactic acid bacteria Lactobacillus Microbiota Probiotics STAPHYLOCOCCUS WEISSELLA
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