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Effects of acid deposition control in China:a review based on responses of subtropical forests

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 115-126页

作者： Danni xie Xiaodong Ge Lei Duan Jan Mulder School of Land Engineering Chang’an UniversityXi’an 710064China State Key Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life SciencesBox 5003NO-1432ÅsNorway

For many decades,acid deposition used to pose a significant regional air pollution challenge in *** substantial emission control of anthropogenically derived sulfur and nitrogen containing gasses,both sulfur and nitrogen deposition,as well as the acid rain-affected area,have significantly decreased compared to their peak ***,particularly in the humid subtropics,are sensitive to acid deposition,as evidenced by soil acidification,sulfate and nitrate leaching in stream water,and elevated soil nitrous oxide *** in the total deposition of sulfur and nitrogen,caused a significant decline in sulfate and nitrate leaching from subtropical forest and subsequently in sulfate and nitrate concentrations in stream water,although there was about a 5-year *** delay may be attributed to the desorption of accumulated sulfate and continued elevated mineralization of accumulated nitrogen *** of nitrous oxide,a potent greenhouse gas,also declined in nitrogen-saturated subtropical forest soils,as soil water nitrate concentration ***,subtropical forests in China suffering from elevated acid deposition have begun to ***,the current levels of sulfur and nitrogen deposition continue to exceed the critical loads,i.e.,the assigned threshold levels in accordance with emission control policies,in more than 10%of the country’s land area,respectively,indicating remaining risks of acidification and ***,further emission reductions are urgently needed,also because they will help achieving goals related to air quality and nitrous oxide emissions.

关键词： Acidification Critical load Nitrous oxide Surface water chemistry Recovery

The reaction mechanism and interfacial crystallization of Al nanoparticle-embedded Ni under shock loading

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Defence Technology（防务技术） 2024年第3期33卷 114-124页

作者： Yifan xie Jian-Li Shao Rui Liu Pengwan Chen State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Explosion Protection and Emergency Disposal Technology Engineering Research Center of the Ministry of Education Beijing100039China

The shock-induced reaction mechanism and characteristics of Ni/Al system,considering an Al nanoparticle-embedded Ni single crystal,are investigated through molecular dynamics *** the shock melting of Al nanoparticle,interfacial crystallization and dissolution are the main *** reaction degree of Al particle first increases linearly and then logarithmically with time driven by rapid mechanical mixing and following *** reaction rate increases with the decrease of particle diameter,however,the reaction is seriously hindered by interfacial crystallization when the diameter is lower than 9 nm in our ***,we found a negative exponential growth in the fraction of crystallized Al atoms,and the crystallinity of B2-NiAl(up to 20%)is positively correlated with the specific surface area of Al *** can be attributed to the formation mechanism of B2-NiAl by structural evolution of finite mixing layer near the collapsed *** shock melting of both Al particle and Ni matrix,the liquid-liquid phase inter-diffusion is the main reaction mechanism that can be enhanced by the formation of internal *** addition,the enhanced diffusion is manifested in the logarithmic growth law of mean square displacement,which results in an almost constant reaction rate similar to the mechanical mixing process.

关键词： Shock-induced reaction Molecular dynamics simulations Interfacial crystallization Reaction mechanism

Cerebral furin deficiency causes hydrocephalus in mice

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Genes & Diseases 2024年第3期11卷 438-451页

作者： Shiqi xie Xiaoyong xie Jing Tang Biao Luo Jian Chen Qixin Wen Jianrong Zhou Guojun Chen Nursing College Chongqing Medical UniversityChongqing 400016China Department of Neurology The First Affiliated Hospital of Chongqing Medical UniversityChongqing Key Laboratory of Major Neurological and Mental DisordersChongqing Key Laboratory of NeurologyChongqing 400016China

Furin is a pro-protein convertase that moves between the trans-Golgi network and cell surface in the secretory *** have previously reported that cerebral overexpres-sion of furin promotes cognitive functions in ***,by generating the brain-specific furin conditional knockout(ckO)mice,we investigated the role of furin in brain *** found that furin deficiency caused early death and growth *** resonance im-aging showed severe *** the brain of furin cko mice,impaired ciliogenesis and the derangement of microtubule structures appeared along with the down-regulated expres-sion of RAB28,a ciliary vesicle *** line with the widespread neuronal loss,ependymal cell layers were *** proteomics analysis revealed that cell adhesion molecules including astrocyte-enriched ITGB8 and BCAR1 were altered in furin cKO mice;and astrocyte overgrowth was accompanied by the reduced expression of sox9,indicating a disrupted differ-entiation into ependymal ***,whereas alteration of RAB28 expression correlated with the role of vesicle trafficking in ciliogenesis,dysfunctional astrocytes might be involved in ependymal damage contributing to hydrocephalus in furin ckO *** structural and mo-lecular alterations provided a clue for further studying the potential mechanisms of furin.

关键词： Astrocyte Ciliogenesis Conditionalknockout Ependymal Furin Hydrocephalus Proteomics

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无需油气分离的油中溶解乙炔原位直接检测

中国电机工程学报 2023年第20期43卷 8151-8160页

作者：王渊马国明谢洋洋陈章霖郑迪雅秦炜淇新能源电力系统国家重点实验室(华北电力大学) 北京市昌平区102206

现有变压器油色谱技术检测存在时效性差、传感元件无法内置于变压器内部、油气分离时间长等问题,该文提出一种基于光子晶体光纤的油中溶解乙炔光热光谱直接检测方法。通过在光纤表面加工尺寸仅为3μm×3μm、且深至芯区的微通道以及光... 详细信息

现有变压器油色谱技术检测存在时效性差、传感元件无法内置于变压器内部、油气分离时间长等问题,该文提出一种基于光子晶体光纤的油中溶解乙炔光热光谱直接检测方法。通过在光纤表面加工尺寸仅为3μm×3μm、且深至芯区的微通道以及光传输损耗低至3.1dB的光纤熔接等方法,研制出可实现激光在油中低损耗传输的油芯光子晶体光纤。理论推导泵浦光导致的光子晶体光纤内温升分布情况,探索探测光相位与油中乙炔含量的关联关系。提出基于外差干涉的油中乙炔光热光谱传感拓扑,在干涉结构传感臂引入光纤环腔,提升了检测灵敏度。此外,提出双泵浦光波长差分降噪方法,可有效降低变压器运行现场噪声对乙炔检测结果的严重干扰。成功实现无需油气分离的油中痕量乙炔高灵敏度、高可靠性检测,检测下限达1.4μL/L。开展变压器油中放电分解乙炔高电位原位实时检测,试验结果表明,所研制的油中溶解乙炔光热光谱检测系统可大幅提高变压器诊断的时效性。

关键词：油中溶解乙炔油芯光子晶体光纤光热光谱原位检测无需油气分离

Microstructure and properties of coarse-grained WC-10Co cemented carbides with different carbon contents during heat treatments

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Rare Metals 2024年第4期43卷 1786-1792页

作者： Yuan-Feng xie Xing-Cheng xie Zhong-Wu Li Rui-Jun Cao Zhong-Kun Lin Qing Li Chen-Guang Lin Powder Metallurgy and Special Materials Research Department General Research Institute for Nonferrous MetalsBeijing100088China

The effects of cryogenic treatment(CT)and tempering-cryogenic treatment(TCT)on the microstructure and properties of coarse-grained WC-10Co cemented carbides with different carbon contents were *** binder phase,WC mean grain sizes,W solubility in the binder,relative magnetic s aturation,densities,hardness,wear resistance and second phase precipitation of cemented carbides with different heat treatments were *** results show that there are significant changes of microstructure and properties in the samples with CT and TCT,especially due to the precipitation of metastable nanoparticles W_(x)Co_(y)C_(z) in the binder during the heat treatments of CT and *** the simultaneous combination of microstructure and nanoparticle-reinforced binder,a dramatically improved combination of hardness and wear resistance of the samples after TCT has been achieved.

关键词： Cryogenic treatment Tempering Coarsegrained cemented carbide Carbon content Nanoparticlereinforced binder

The Hierarchy of Distribution in Private Law

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Social Sciences in China 2024年第2期45卷 29-48页

作者： xie Hongfei Institute of Law Chinese Academy of Social Sciences

In terms of the theory of the three hierarchies of distribution in economics,private law can be seen as embodying a 2.5th *** distribution confers equal objective rights on all private agents,who acquire subjective rights through de facto and de jure *** legal environment should be conducive to unleashing the energy and creativity of agents,supporting entrepreneurs,safeguarding competitive neutrality and promoting the mobility of factors of production in order to consolidate the material foundation of common *** changes the rules of primary distribution and is an inherent and rightful function of private *** equalizing the strengths and weaknesses of the interactions of private agents,redistribution is better able to promote self-determination and defend human dignity than public ***,it enables private law to achieve the national goals of enhancing social welfare and reducing confrontation in the operation of *** law lies between redistribution and tertiary distribution,occupying the 2.5th *** most typical expression is"interference liability,"i.e.,justified harm inflicted in cases of necessity(Aufopferungshaftung).This includes the expansion of the social liability of profitmaking legal persons,the expansion of tort liability,and the limitation of the return of *** law enables distributive justice to serve as a common basis for the various hierarchies of distribution,incorporating the different values of private law and weighting them differently depending on the *** justice can also help to transform all private law rules into laws of nature,thus highlighting the neutrality of private law.

关键词： private law primary distribution redistribution distributive justice corrective justice liability for justified harm inflicted in cases of necessity

The Squeeze & Excitation Normalization Based nnU-Net for Segmenting Head & Neck Tumors

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Chinese Journal of Electronics 2024年第3期33卷 766-775页

作者： Juanying xie Ying PENG Mingzhao WANG School of Computer Science Shaanxi Normal University

Head and neck cancer is one of the most common malignancies in the *** propose SE-nnU-Net by adapting SE(squeeze and excitation) normalization into nnU-Net,so as to segment head and neck tumors in PET/CT images by combining advantages of SE capturing features of interest regions and nnU-Net configuring itself for a specific *** basic module referred to convolution-ReLU-SE is designed for *** the encoder it is combined with residual structure while in the decoder without residual *** loss function combines Dice loss and Focal *** specific data preprocessing and augmentation techniques are developed,and specific network architecture is ***,the deep supervised mechanism is introduced to calculate the loss function using the last four layers of the decoder of *** SE-nnU-net is applied to HECKTOR 2020 and HECKTOR 2021 challenges,respectively,using different experimental *** experimental results show that SE-nnU-Net for HECKTOR 2020 obtained 0.745,0.821,and 0.725 in terms of Dice,Precision,and Recall,respectively,while the SE-nnU-Net for HECKTOR 2021 obtains 0.778 and 3.088 in terms of Dice and median HD95,*** SE-nnU-Net for segmenting head and neck tumors can provide auxiliary opinions for doctors diagnoses.

关键词： Image segmentation Head Data preprocessing Artificial neural networks Network architecture Data models Neck

Waking Up Brain with Electrical Stimulation to Boost Memory in Sleep:A Neuroscience Exploration

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Neuroscience Bulletin 2024年第6期40卷 852-854页

作者： Zhe Zhong Fuling Yan Chunming xie Department of Neurology School of MedicineAffiliated Zhongda HospitalSoutheast UniversityNanjing210009China Institute of Neuropsychiatry Affiliated Zhongda HospitalSoutheast UniversityNanjing210009China The Key Laboratory of Developmental Genes and Human Disease Southeast UniversityNanjing210009China

Imagine that,in the future,you could enhance your memory by applying a mild electric current to your brain during *** might sound like science fiction,but it is based on cutting-edge neuroscience *** is widely recognized as a crucial factor for long-term memory consolidation,but the exact mechanisms by which the brain coordinates neural activity across different regions during sleep to reorganize and integrate memories are unknown[1,2].

关键词： Sleep integrate applying

WSN Mobile Target Tracking Based on Improved Snake-Extended Kalman Filtering Algorithm

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Journal of Beijing Institute of Technology 2024年第1期33卷 28-40页

作者： Duo Peng Kun xie Mingshuo Liu School of Computer and Communication of Lanzhou University of Technology Lanzhou Gansu 730050China

A wireless sensor network mobile target tracking algorithm(ISO-EKF)based on improved snake optimization algorithm(ISO)is proposed to address the difficulty of estimating initial values when using extended Kalman filtering to solve the state of nonlinear mobile target ***,the steps of extended Kalman filtering(EKF)are ***,the ISO is used to adjust the parameters of the EKF in real time to adapt to the current motion state of the mobile ***,the effectiveness of the algorithm is demonstrated through filtering and tracking using the constant velocity circular motion model(CM).Under the specified conditions,the position and velocity mean square error curves are compared among the snake optimizer(SO)-EKF algorithm,EKF algorithm,and the proposed *** comparison shows that the proposed algorithm reduces the root mean square error of position by 52%and 41%compared to the SOEKF algorithm and EKF algorithm,respectively.

关键词： wireless sensor network(WSN)target tracking snake optimization algorithm extended Kalman filter maneuvering target