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Water quality,natural chemical weathering and ecological risk assessment of the contaminated area of vanadium ore in Yinhua River,China:Evidence from major ions and trace elements

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Acta Geochimica 2022年第1期41卷 84-99页

作者： Delu Li Yong Xu xiaotuan Zhang Zhidong Yang Shaofei Wang Qianyang He Zhe Jia Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation Xi’an University of Science and TechnologyXi’an 710054China Geological research institute for Coal Green Mining Xi’an University of Science and TechnologyXi’an 710054China College of Geology and Environment Xi’an University of Science and TechnologyXi’an 710054China Shaanxi institute of Geological Survey Xi’an 710054China College of Geomatics Xi’an University of Science and TechnologyXi’an 710054China

There are abundant vanadium ores in the Cambrian strata in southern Shaanxi,*** years of mining activities and surface leaching have polluted the surface water to a certain extent,but the researches on the water quality characteristics and pollution degree are relatively *** contribution was organized to investigate the surface water quality by general parameters,including TDS,Eh,pH,DO,TOC,COD,and EC,in the vanadium ore belt(Yinhua River basin).Major ions were determined to detect the water type and natural chemical weathering,while trace elements were used to illustrate their geochemical characteristics and ecological risk assessment of heavy *** study found that the surface water was weakly alkaline and mainly dominated from normal to pool *** particle size with1000–10,000 nm of suspended particles was the main carrier of organic *** concentration of HCO_(3)^(-)and SO_(4)^(2-)in the anions and Ca^(2+)and Mg^(2+)ions in the cations were relatively high,and the water type was Ca-Mg-HCO_(3)-SO_(4) *** weathering had a great influence on surface water,and the weathering products were mainly silicate and *** with the Type river,the contents of V elements showed an obvious positive anomaly,which may be affected by mining activities of vanadium ore and the annual leaching of the tailings *** and Cd in the surface water was polluted *** integrated pollution index suggested that the surface water pollution was serious,and the main stream was more serious with the increasing tailings ponds.

关键词： Vanadium ore belt Surface water Water contamination Major ions Trace elements

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Joint Authentication Public Network Cryptographic Key Distribution Protocol Based on Single Exposure Compressive Ghost Imaging

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Chinese Physics Letters 2024年第2期41卷 47-56页

作者：俞文凯王硕飞商克谦 Center for Quantum Technology research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement of Ministry of EducationSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China

In the existing ghost-imaging-based cryptographic key distribution(GCKD)protocols,the cryptographic keys need to be encoded by using many modulated patterns,which undoubtedly incurs long measurement time and huge memory *** this,based on snapshot compressive ghost imaging,a public network cryptographic key distribution protocol is proposed,where the cryptographic keys and joint authentication information are encrypted into several color block diagrams to guarantee *** transforms the previous single-pixel sequential multiple measurements into multi-pixel single exposure measurements,significantly reducing sampling time and memory *** simulation and experimental results demonstrate the feasibility of this protocol and its ability to detect illegal ***,it takes GCKD a big step closer to practical applications.

关键词： ghost Ghost Authentication

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High-power all-polarization-maintaining fiber femtosecond pulse laser at 780 nm and its engineering integration

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中国激光 2024年

作者：罗韬温俊鹏王文龙李梓晗朱喆杨家豪吴垠修昊范怡衡刘亚龙韦小明杨中民 Guangzhou Yangming Laser Technology Co. Ltd 3. Research Institute of Future Technology South China Normal University School of Physics and Optoelectronics State Key Laboratory of Luminescent Materials and Devices Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Device Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology

We present a high-power, high-stability all-polarization-maintaining (all-PM)fiber femtosecond pulse laser source at 780 nm with full engineering integration that comprises an all-PM fiber amplified chirped pulse laser at 1560 nm, a grating pair compressorandasecond-harmonicgeneration(SHG)***-PMfiber amplified chirped pulse laser at 1560 nm operates with a repetition rate of 111.5 MHz and an average power of 5.37 W, which is compressed with a pulse width of～204 *** 780-nm pulses are subsequently generated by SHG in a frequency-doubling *** achieve an average power of 2.22 W at 780 nm with a pulse width of 288 fs, an SHG efficiency of 52%, and a root-mean-square power fluctuation of 0.23%, which is *** integrated for practical application with reliable laser operation. We anticipate that this780-nmall-PMfiberfemtosecondpulselaserwithfullengineeringintegrationis promising for frontier applications, like two-photon imaging, nanofabrication, terahertz generation, etc.

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Predicting solutions of the Lotka-Volterra equation using hybrid deep network

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Theoretical & Applied Mechanics Letters 2022年第6期12卷 423-431页

作者： Zi-Fei Lin Yan-Ming Liang Jia-Li Zhao Jiao-Rui Li School of Statistics Xi’an University of Finance and EconomicsXi’an 710100China China(xi’an)institute for Silk Road research Xi’an 710100China

Prediction of Lotka-Volterra equations has always been a complex problem due to their dynamic *** this paper,we present an algorithm for predicting the Lotka-Volterra equation and investigate the prediction for both the original system and the system driven by *** demonstrates that deep learning can be applied in dynamics of *** is the first study that uses deep learning algorithms to predict Lotka-Volterra *** numerical examples are presented to illustrate the performances of the proposed algorithm,including Predator nonlinear breeding and prey competition systems,one prey and two predator competition systems,and their respective *** the results suggest that the proposed algorithm is feasible and effective for predicting Lotka-Volterra ***,the influence of the optimizer on the algorithm is discussed in *** results indicate that the performance of the machine learning technique can be improved by constructing the neural networks appropriately.

关键词： Lotka-Volterra equations HDN-LV algorithm Stochastic Lotka-Volterra equations Parameter optimization

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Atomic interface regulation of rare-marth metal single atom catalysts for energy conversion

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Nano research 2024年第5期17卷 3493-3515页

作者： Ziheng Zhan Zhiyi Sun Zihao Wei Yaqiong Li Wenxing Chen Shenghua Li Siping Pang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

Efficient photocatalysis and electrocatalysis in energy conversion have been important strategies to alleviate energy crises and environmental *** recent years,with the rapid development of emerging catalysts,significant progress has been made in photocatalysis for converting solar energy into chemical energy and electrocatalysis for converting electrical energy into chemical ***,their selectivity and efficiency of the products are *** earth(RE)can achieve atomic level fine regulation of catalysts and play an crucial role in optimizing catalyst performance by their unique electronic and orbital ***,there is a lack of systematic review on the atomic interface regulation mechanism of RE and their role in energy conversion *** atom catalysts(SACs)provide clear active sites and 100%atomic utilization,which is conducive to exploring the regulatory mechanisms of ***,this review mainly takes atomic level doped RE as an example to review and discuss the atomic interface regulation role of RE elements in energy ***,a brief introduction was given to the synthesis strategies that can effectively exert the atomic interface regulation effect of RE,with a focus on the atomic interface regulation mechanism of ***,the regulatory mechanisms of RE atoms have been systematically summarized in various energy conversion ***,the challenges faced by RE in energy conversion,as well as future research directions and prospects,were pointed out.

关键词： rare earth elements interface regulation effect single-atom catalyst energy conversion

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Adhesion property of AlCrNbSiTi high-entropy alloy coating on zirconium:experimental and theoretical studies

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Nuclear Science and Techniques 2024年第8期35卷 79-91页

作者： Bao‑Liang Zhang Wen‑Guan Liu Meng‑He Tu Can Fang Yan Liu Yu‑Hui Wang Yong Hu Hui Wang China institute of Atomic Energy Beijing 102413China Sino‑French institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China

Experimental scratch tests and first-principles calculations were used to investigate the adhesion property of AlCrNbSiTi high-entropy alloy(HEA)coatings on zirconium *** HEA and Cr coatings were deposited on Zr alloy substrates using multi-arc ion plating technology,and scratch tests were subsequently conducted to estimate the adhesion property of the *** results indicated that Cr coatings had better adhesion strength than HEA coatings,and the HEA coatings showed *** special quasi-random structure approach was used to build HEA models,and Cr/Zr and HEA/Zr interface models were employed to investigate the cohesion between the coatings and Zr substrate using first-principles *** calculated interface energies showed that the cohesion between the Cr coating and the Zr substrate was stronger than that of the HEA coating with *** contrary to Al or Si in the HEA coating,Cr,Nb,and Ti atoms binded strongly with Zr *** on the calculated elastic constants,it was found that low Cr and high Al content decreased the mechanical performances of HEA ***,this study demonstrated the utilization of a combined approach involving first-principles calculations and experimental studies for future HEA coating development.

关键词： High-entropy alloy coating Cr coating Adhesion property Scratch test First-principles calculation

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Highly permeable reverse osmosis membranes incorporated with hydrophilic polymers of intrinsic microporosity via interfacial polymerization

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Chinese Journal of Chemical Engineering 2022年第5期35卷 194-202页

作者： Jing Dou Shuo Han Saisai Lin Zhikan Yao Lian Hou Lin Zhang Engineering research Center of Membrane and Water Treatment of MOE College of Chemical&Biological EngineeringZhejiang UniversityHangzhou 310027China research institute of Ningbo Zhejiang UniversityNingbo 315100China xi’an High-Tech institute Xi’an 710025China

Enhancing the water permeation while maintaining high salt rejection of existing reverse osmosis(RO)membranes remains a considerable ***,we proposed to introduce polymer of intrinsic microporosity,PIM-1,into the selective layer of reverse osmosis membranes to break the trade-off effect between permeability and selectivity.A water-soluble a-LPIM-1 of low-molecular-weight and hydroxyl terminals was *** designed characteristics endowed it with high solubility and *** it was mixed with m-phenylenediamine and together served as aqueous monomer to react with organic monomer of trimesoyl chloride via interfacial *** characterization results exhibited that more“nodule”rather than“leaf”structure formed on RO membrane surface,which indicated that the introduction of the high free-volume of a-LPIM-1 with three dimensional twisted and folded structure into the selective layer effectively caused the frustrated packing between polymer *** virtue of this effect,even with reduced surface roughness and unchanged layer thickness,the water permeability of prepared reverse osmosis membranes increased 2.1 times to 62.8 L·m^(-2)·h^(-1) with acceptable Na Cl rejection of 97.6%.This attempt developed a new strategy to break the trade-off effect faced by traditional polyamide reverse osmosis membranes.

关键词： PIM-1 Intrinsic microporosity Reverse osmosis Interfacial polymerization Trade-off

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Ethical concerns in aging research:perspectives of global frontline researchers

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Science China Life Sciences 2024年

作者： Yaojin Peng Lulu Ding Zhenyu xiao Moshi Song Jianwei Lü Guanghui Liu Key Laboratory of Organ Regeneration and Reconstruction State Key Laboratory of Stem Cell and Reproductive Biology Institute of Zoology Chinese Academy of Sciences University of Chinese Academy of Sciences Beijing institute for Stem Cell and Regenerative Medicine institute for Stem Cell and Regeneration Chinese Academy of Sciences Aging Biomarker Consortium (ABC) School of Life Science Beijing Institute of Technology School of Life Sciences Xiamen University Advanced Innovation Center for Human Brain Protection and National Clinical research Center for Geriatric Disorders Xuanwu Hospital Capital Medical University Aging Translational Medicine Center International Center for Aging and Cancer Beijing Municipal Geriatric Medical Research Center Xuanwu Hospital Capital Medical University

This study investigated the ethical landscape of aging research amid the increasing global focus on extending the human lifespan and health span. Our global survey of 180 researchers across 38 jurisdictions revealed divergent perceptions of aging, a consensus regarding the feasibility of delaying aging, and multiple perspectives regarding lifespan extension. The present findings underscore a paradigm shift toward inclusive and ethically sound research, emphasizing the need for an approach that strikes a balance between basic and clinical research. In addition, this study highlighted key ethical concerns in aging research, including the effects of misleading advertising, potential inequality in access to aging interventions, and risks pertaining to the extrapolation of research findings from lower-model organisms to humans. The insights presented in this paper call for an integrated approach for overcoming the complex ethical and societal challenges in aging research to ensure responsible and equitable advancements in this burgeoning field.

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A novel pathogen Fusarium cuneirostrum causing common bean(Phaseolus vulgaris)root rot in China

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Journal of Integrative Agriculture 2024年第1期23卷 166-176页

作者： Dong Deng Wenqi Wu Canxing Duan Suli Sun Zhendong Zhu institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

Several fungal pathogens cause root rot of common bean,among which Fusarium *** the most common pathogens causing Fusarium root rot(FRR)*** has been becoming an increasingly severe disease of common bean in China,but the species of Fusarium *** remained ***,this study was performed to identify the pathogen causing common bean root rot in Liangcheng County,Inner Mongolia,*** Fusarium-like isolates were obtained after pathogen isolation and *** pathogenicity test indicated that eight isolates caused severe disease symptoms on common bean,while 11 other isolates were not *** eight pathogenic isolates,FCL1–FCL8,were identified as Fusarium cuneirostrum by morphological characterization and phylogenetic analysis using partial sequences of EF-1α,ITS,28S,and IGS *** range test showed that the representative *** isolate FCL3 was also pathogenic to mung bean,while not pathogenic to adzuki bean,chickpea,cowpea,faba bean,pea,and ***,50 common bean and 50 mung bean cultivars were screened for resistance to FRR,and seven highly resistant or resistant cultivars of common bean were identified,while no resistant cultivars of mung bean were *** study revealed that *** was one of common bean FRR pathogens in Inner Mongolia and it could induce mung bean root rot as *** our knowledge,this is the first report of *** causing FRR of common bean in China.

关键词： Fusarium cuneirostrum fusarium root rot pathogenicity molecular phylogenetic analysis Phaseolus vulgaris

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Combatting anthrax outbreaks across Nigeria's national land borders: need to optimize surveillance with epidemiological surveys

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Infectious Diseases of Poverty 2024年第1期13卷 100-100页

作者： Hammed O.Mogaji Babatunde Adewale Stella I.Smith Ehimario U.Igumbor Chidumebi J.Idemili Andrew W.Taylor-Robinson Yale School of Public Health Yale University New Haven USA Parasitology and Epidemiology Unit Federal University Oye-Ekiti Oye-Ekiti Nigeria Department of Public Health and Epidemiology Nigerian Institute of Medical Research Lagos Nigeria Department of Molecular Biology and Biotechnology Nigerian Institute of Medical Research Lagos Nigeria Centre for Infectious Disease research Nigerian Institute of Medical Research Lagos Nigeria Department of Public Health Walter Sisulu University Mthatha South Africa institute of Health Policy Management and Evaluation University of Toronto Toronto Canada College of Health Sciences Vin University Hanoi Vietnam Center for Global Health Perelman School of Medicine University of Pennsylvania Philadelphia USA

Background Anthrax is a non-contagious zoonotic disease caused by the Gram-positive,spore-forming bac-terium Bacillus *** is common in livestock and wild animals such as cattle,goats,sheep,camels,and *** humans,anthrax may occur after contact with contaminated carcasses or animal products like milk and *** best method to prevent anthrax in people is to ensure livestock are vaccinated,which significantly limits the risk of zoonotic spread to ***,the rate of vaccination of domesticated animals kept by nomadic pastoralists in West Africa is *** groups regularly cross over national boundaries with their grazing *** is a country that historically has done comparatively well to contain this public health ***,in 2023 several outbreaks of human disease appear linked to the consumption of anthrax-contaminated animal products brought into Nigeria by pastoralists from neighboring *** manifestations include skin sores or ulcers,nausea,vomiting,and *** article aims to raise awareness of recent outbreaks of anthrax in West Africa and to callfor a renewed focus on measures to combat this neglected public health concern to the *** body The imperative to pinpoint pivotal issues relating to the ongoing emergence of anthrax cases in Nigeria cannot be *** delving into the prevalence of anthrax in both livestock and human populations residing along Nigeria's borders,unraveling the genetic diversity and potential sources of *** strains,and identify-ing the primary animal host(s)responsible for transmission,we stand to enhance our understanding of this critical ***,investigating the multifaceted factors contributing to anthrax transmission,assessing community knowledge and practices,mapping common migratory routes of pastoralists,and formulating targeted interven-tion strategies tailored to the challenges of border communities,are each crucial steps towards eff

关键词： border Combat doubt

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