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Application of Wenner Configuration to Estimate Soil Water Content in Pine Plantations on Sandy Land

Pedosphere 2007年第6期17卷 801-812页

作者： ZHU Jiao-Jun kang hong-zhang Y. GONDA Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 （China）. Graduate School Chinese Academy of Sciences Beijing 100039 （China） Shanghai Jiaotong University Shanghai 200240 （China） Faculty of Agriculture Niigata University Niigata 950-2181 （Japan）

To estimate the mean value of surface soil water content rapidly,accurately,and nonintrusively,field investigations on soil electrical resistivity(SER)with the Yokogawa 324400 earth resistivity meter and the surface(0-150 cm)soil water content(SWC)with time domain reflectometry(TDR),together with the abiotic factors including soil texture,structure. and salinity concentrations were conducted in the Mongolian pine(Pinus sylvestris ***)plantations on a sandy *** measurement of SER was based on the 4-probe Wenner configuration *** between the values of SWC and SER were obtained based on analysis of the abiotic factors of the research site,which play a key role in affecting the soil electrical *** indicate that the SER meter could be used to estimate the mean value of SWC in the Mongolian pine plantations on the sandy land during the growing *** bulky nature of the equipment simplified the cumbersome measurements of soil water content with the general *** must be noted that the Wenner configuration method could only provide the mean values of the SWC,and the soil texture,structure, temperature,and solute concentrations influenced the SER and further affected the estimation of the SWC by the SER ***,the results of this study could be applied on a sandy land during the growing seasons ***, the SWC of other soil types also may be obtained according to the individual soil types using the procedures of this study.

关键词： Mongolian pine plantation sandy land soil electrical resistivity soil water content Wenner configuration method

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Failure rate analysis and maintenance plan optimization method for civil aircraft parts based on data fusion

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Chinese Journal of Aeronautics 2025年第1期38卷 306-324页

作者： kang CAO Yongjie zhang Jianfei FENG School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710072China Shanghai Aircraft Design and Research Institute Shanghai 201210China

In the face of data scarcity in the optimization of maintenance strategies for civil aircraft,traditional failure data-driven methods are encountering challenges owing to the increasing reliability of aircraft *** study addresses this issue by presenting a novel combined data fusion algorithm,which serves to enhance the accuracy and reliability of failure rate analysis for a specific aircraft model by integrating historical failure data from similar models as supplementary *** a comprehensive analysis of two different maintenance projects,this study illustrates the application process of the *** upon the analysis results,this paper introduces the innovative equal integral value method as a replacement for the conventional equal interval method in the context of maintenance schedule *** Monte Carlo simulation example validates that the equivalent essential value method surpasses the traditional method by over 20%in terms of inspection efficiency *** discovery indicates that the equal critical value method not only upholds maintenance efficiency but also substantially decreases workload and maintenance *** findings of this study open up novel perspectives for airlines grappling with data scarcity,offer fresh strategies for the optimization of aviation maintenance practices,and chart a new course toward achieving more efficient and cost-effective maintenance schedule optimization through refined data analysis.

关键词： Small sample data Data fusion Failure rate Maintenance planning Aircraft parts

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Stabilizing water and regulating interfacial electrostatic interaction with economical supporting salt for stable Zn metal anode

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Journal of Energy Chemistry 2025年第2期101卷 429-436页

作者： Yiqun Du Rongkai kang Boya zhang Han Wang Jianxin zhang School of Material Science & Engineering University of Jinan Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) School of Materials Science and Engineering Shandong University

Developing rechargeable aqueous Zn batteries for large-scale energy storage is impeded by inadequate reversibility and stability of the Zn anode,primarily caused by parasitic reactions and heterogeneous *** study proposes an economical electrolyte strategy to address these Zn-related *** addition of a supporting salt enhances the thermodynamic stability of water,reduces the number of highly reactive water molecules,and modulates the interfacial electrostatic *** approach effectively suppresses hydrogen evolution reaction and uncontrolled ***,the rationally proportioned electrolyte allows a high average Coulombic efficiency of 99.93% for 1000 cycles in a Zn‖Cu battery and a prolonged lifespan exceeding 4800 h in Zn‖Zn *** knock-on effect is that Zn‖MnO2pouch cells deliver stable cycling performance,demonstrating the viability of this approach for practical applications.

关键词： Aqueous electrolyte Hydrogen bond Sodium citrate Solvation structure Zn anode

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In situ construction of Cu(Ⅰ)-Cu(Ⅱ) pairs for efficient electrocatalytic nitrate reduction reaction to ammonia

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Journal of Energy Chemistry 2025年第1期100卷 106-113页

作者： Muyun Zheng Yuchi Wan Leping Yang Shen Ao Wangyang Fu Zhengjun zhang Zheng-hong Huang Tao Ling Feiyu kang Ruitao Lv State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108FujianChina Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education Tianjin Key Laboratory of Composite and Functional MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China

Electrocatalytic nitrate reduction reaction (NO_(3)-RR) to ammonia under ambient conditions is expected to be a green process for ammonia synthesis and alleviate water pollution *** report a CuO nanoparticles incorporated on nitrogen-doped porous carbon (CuO@NC) catalyst for NO_(3)-*** of Cu(Ⅱ) is reduced to Cu(Ⅰ) during the NO_(3)-RR process to construct Cu(Ⅰ)-Cu(Ⅱ) pairs,confirmed by in situ X-ray photoelectron spectroscopy (XPS) and Raman *** functional theory (DFT) calculations indicated that the formation of Cu(Ⅰ) could provide a reaction path with smaller energy barrier for NO_(3)-RR,while Cu(Ⅱ) effectively suppressed the competition of hydrogen evolution reaction (HER).As a result,CuO@NC catalyst achieved a Faradaic efficiency of 84.2% at -0.49 V versus reversible hydrogen electrode (RHE),and a NH_(3)yield rate of 17.2 mg h^(-1)mg^(-1)*** -0.79 V ***,higher than the HaberBosch process (<3.4 g h^(-1)g^(-1)cat.).This work may open a new avenue for effective NO_(3)-RR by modulating oxidation states.

关键词： Ammonia synthesis Cu oxidation state Electrochemistry Nitrate reduction In situ XPS

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Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 504-514页

作者： Lou zhang Shuo Li Fu Tang Jingkai zhang Yuetong kang Hean zhang Lidong Li State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Silver nanoparticles(Ag NPs)have attracted attention in the field of biomaterials due to their excellent antibacterial ***,the reducing and stabilizing agents used for the chemical reduction of Ag NPs are usually toxic and may cause water *** this work,Ag NPs(31.2 nm in diameter)were prepared using the extract of straw,an agricultural waste,as the reducing and stabilizing *** analysis revealed that the straw extract contained lignin,the structure of which possesses phenolic hydroxyl and methoxy groups that facilitate the reduction of silver salts into Ag *** surfaces of Ag NPs were negatively charged due to the encapsulation of a thin layer of lignin molecules that prevented their *** the prepared Ag NPs were added to the precursor solution of acrylamide,free radical polymerization was triggered without the need for extra heating or light irradiation,resulting in the rapid formation of an Ag NP-polyacrylamide composite *** inhibition zone test proved that the composite hydrogel possessed excellent antibacterial ability due to the presence of Ag *** prepared hydrogel may have potential applications in the fabrication of biomedical materials,such as antibacterial dressings.

关键词： silver nanoparticles hydrogel straw extraction antibacterial

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The utilization status of aspirin for the secondary prevention of ischemic stroke

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Chinese Medical Journal 2009年第2期122卷 165-168页

作者： KE Xian-jun YU Yong-fei GUO Zhen-li XU kang HAI hong zhang Ai-he JIANG hong PENG hong Department of Neurology People's Hospital of East and West Lake District Wuhan Hubei 430040 China

Background The present study was aimed to investigate the usage of aspirin for the secondary prevention of ischemic stroke, evaluate the correlated factors, and analyze the reasons for not taking and irregularly taking aspirin. Methods The patients in this group were all stroke survivors who have formerly been diagnosed with a cerebral infarction or transient ischemic attack （TIA） in our hospital. We investigated their use of aspirin over a three-year period following their hospitalization. According to the patients＇ aspirin usage, they were divided into treatment and non-treatment groups. In addition, the reasons for not taking or irregularly taking aspirin were analyzed in the two groups. Results A total of 1240 patients were studied, including 367 （29.60%） in the treatment group and 873 （70.40%） cases in the non-treatment group. In addition, 201 （16.20%） cases in the treatment group had been regularly taking aspirin （50-325 mg of aspirin daily） for 1 to 3 years or longer. The results demonstrated that the main reasons for not taking aspirin in this study were related to patients＇ concerns regarding the side effects of taking aspirin （46.45%）, as well as the doctors＇ inadequacy in informing their patients to take aspirin （38.71%）. The major reasons for patients to irregularly take aspirin were that the doctors did not notify the length of aspirin usage to their patients （41.57%）, and that doctors did not prescribe aspirin upon the patients＇ follow-up visit （26.51%）. Conclusion The most effective way to increase patient＇s compliance for aspirin consumption is to promote the guidelines for stroke treatment and to relay these advances in stroke therapy to the patient. Chin Med J 2009; 122（2）： 165-168

关键词： ischemic stroke aspirin secondary prevention

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The secondary periodic elementβ_(p^(2)/p^(2)-1)and its applications

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Science China Mathematics 2025年第1期68卷 207-222页

作者： Jianguo hong Xiangjun Wang Yu zhang Science College Shijiazhuang UniversityShijiazhuang 050035China School of Mathematical Sciences Nankai UniversityTianjin 300071China Center for Applied Mathematics Tianjin UniversityTianjin 300072China

Let p≥7 be a *** prove thatβ_(p^(2)/p^(2)-1)survives to E_(∞)in the Adams-Novikov spectral ***,using the Thom mapΦ:■,we can see that h0h3 also survives to E_(∞)in the classical Adams spectral *** an application ... 详细信息

关键词： stable homotopy groups of spheres Adams-Novikov spectral sequence in nite descent method

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Effects of biological soil crusts on plant growth and nutrient dynamics in the Minqin oasis-desert ecotone,Northwest China

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Journal of Arid Land 2025年第1期17卷 130-143页

作者： kang Jianjun YANG Fan zhang Dongmei DING Liang Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Linze Inland River Basin Research StationChinese Ecosystem Research NetworkNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Minqin National Studies Station for Desert Steppe Ecosystem Gansu Desert Control Research InstituteLanzhou 730070China zhangye Agricultural and Rural Bureau Zhangye 734000China

Biological soil crusts(BSCs)play crucial roles in improving soil fertility and promoting plants settlement and reproduction in arid ***,the specific effects of BSCs on growth status and nutrient accumulation of plants are still unclear in different arid *** study analyzed the effects of three different BSCs treatments(without crust(WC),intact crust(IC),and broken crust(BC))on the growth,inorganic nutrient absorption,and organic solute synthesis of three typical desert plants(Grubovia dasyphylla(Fisch.&***.)Freitag&***,Nitraria tangutorum Bobrov,and Caragana koraiensis Kom.)in the Minqin desert-oasis ecotone of Northwest *** showed that the effects of three BSCs treatments on seed emergence and survival of three plants varied with seed *** IC treatment significantly hindered the emergence and survival of seeds,while the BC treatment was more conducive to seed emergence and survival of *** significantly promoted the growth of three plants,but their effects on plant growth varied at different stages of the ***,the growth of *** was affected by BSCs in early stage,but the effects on the growth of *** significantly weakened in the middle and late ***,the growth of *** and *** only showed differences at the middle and late stages,with a significant enhancement in *** of variance showed that BSCs,plant species,growth period,and their interactions had significant effects on the biomass and root:shoot ratio of three *** significantly affected the nutrients absorption and organic solute synthesis in ***,BSCs significantly promoted nitrogen(N)absorption in plants and increased plant adaptability in N poor desert ecosystems,but had no significant effects on phosphorus(P)*** effects of BSCs on inorganic nutrient absorption and organic solute synthesis in plants varied significantly among different plant *** results su

关键词： biological soil crusts(BSCs) desert oasis desert plants growth nutrient accumulation

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Sequence-activated chemiluminescence probes:programmable illumination for high-contrast in vivo sensing and imaging

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Science China Chemistry 2025年第1期68卷 26-34页

作者： Yutao zhang Juan Li Wei-hong Zhu Zhiqian Guo Shanghai Key Laboratory of Functional Materials Chemistry Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Bioreactor Engineering Shanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismEast China University of Science&TechnologyShanghai 200237China

Sequence-activated chemiluminescence(CL)technique offers a unique approach to detecting specific biomolecules or cellular events with high sensitivity and spatial *** fundamental principle behind sequence-activated CL probes involves tailoring highly-controllable CL signals in response to specific sequences or events of interest,thus enabling high-contrast signals under complex physiological *** sequential activation could be triggered by enzymes,reactive oxygen species(ROS),biothiols or changes in the *** unique sequence-activated CL probes bestow several advantages,including minimal background,deep-tissue penetration,and the ability of non-invasive or minimally invasive *** sequence-activated CL techniques represent a significant advancement in molecular imaging and *** this mini-review,we focus on the latest developments in sequential CL probes,addressing the technical challenges and discussing the future trajectory by harnessing CL signaling and molecular recognition.

关键词： chemiluminescnece sequence-activation in-vivo bioimaging cyclic peroxide

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Influencing factors of early post-traumatic stress disorder in young and middle-aged individuals with open globe injuries in west China:a cross-sectional study

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International Journal of Ophthalmology(English edition) 2025年第1期18卷 146-153页

作者： Yi-Man Li Xin zhang Ji-hong Zeng hong-Mei Luo Department of Ophthalmology West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

AIM:To evaluate the prevalence of early post-traumatic stress disorder(PTSD)among young and middle-aged patients who have suffered open globe injuries,and to identify the psychosocial factors influencing PTSD in these ***:A total of 280 patients who underwent ocular trauma surgery between January 2023 and January 2024 were selected through convenience *** were collected using a custom-designed demographic questionnaire,the Connor-Davidson Resilience Scale(CDRISC),the Cognitive Emotion Regulation Questionnaire(C-ERRI),and the PTSD Checklist-Civilian Version(PCL-C).Univariate analysis and stepwise multiple linear regression analysis were performed to determine the factors affecting PTSD in these ***:The average PTSD score for the patients was 33.22±*** scores for individual PTSD dimensions,ranked from highest to lowest,were recurrent traumatic experiences,heightened arousal,avoidance reactions,and social *** PTSD symptoms were observed in 85 patients(30.36%).Univariate analysis indicated that gender,postoperative vision,marital status,psychological resilience,and rumination were significant factors affecting PTSD symptoms(χ^(2)/t=6.53,17.88,8.83,2.17,and 14.1,respectively;all P<0.05).Pearson correlation analysis showed a positive correlation between rumination and PTSD symptoms(r=0.73,P<0.01)and a negative correlation between psychological resilience and PTSD symptoms(r=-0.14,P<0.05).Stepwise multiple linear regression analysis identified postoperative vision(notably eye removal),rumination levels,and psychological resilience(optimism)as major factors influencing PTSD in these patients(R^(2)=0.57,P<0.001).CONCLUSION:Young and middle-aged patients with open globe injuries have a high incidence of *** risk factors for early PTSD include primary enucleation,high levels of rumination,and low psychological resilience(optimism).Conversely,patients with good postoperative vision recovery,low rumination l

关键词： young and middle-aged open globe injuries post-traumatic stress disorder rumination psychological resilience

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