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Light grazing alleviates aeolian erosion–deposition effects on microbial communities in a semi-arid grassland

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Ecological Processes 2024年第2期13卷 148-164页

作者： Mingming Cui Biqi Bao Yipu Wu Nan Hui Mai-He Li Shiqiang Wan Shijie Han Feirong Ren junqiang zheng International Joint Research Laboratory for Global Change Ecology School of Life Sciences Henan University Yellow River Floodplain Ecosystems Research Station School of Life Sciences Henan University School of Agriculture and Biology Shanghai Jiao Tong University Forest Dynam-ics Swiss Federal Institute for Forest Snow and Landscape Research WSL Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains Ministry of Education School of Geographical Sciences Northeast Normal University School of Life Science Hebei University

Background Soil erosion affects the stability of terrestrial ecosystems and ecosystem services by directly or indirectly impacting the cycling of soil materials and energy and reducing the fertility of grassland soils. However, research on microbial adaptation to grazing and soil erosion is limited, particularly in relation to grassland ecosystem restora-tion. Here, we assess microbial communities subjected to simulated soil erosion and grazing in a semi-arid grassland of Inner Mongolia, *** No significant change was observed in soil variables. However, the structure of the soil microbial commu-nity underwent significant changes as a result of soil erosion and soil erosion plus grazing, leading to a significant increase in the relative abundance of Cyanobacteria(116.80% vs 116.38%). Wind erosion and deposition contributed to an increase in the network complexity of soil bacterial and fungal communities. However, much of this effect was alleviated by grazing. Simultaneously, aeolian processes and grazing regulate soil microbial community assembly, leading to inconsistent patterns of change in bacterial and fungal communities. Under wind erosion and deposi-tion, the relative contribution of deterministic processes(4.44% vs 31.11%) in bacterial communities increased, while the relative contribution of stochastic processes(2.23% vs 20%) in fungal communities reduced. Grazing resulted in a decrease in the relative contribution of deterministic processes(8.89%) in the bacterial community and an increase in the relative contribution of stochastic processes(8.89%) in the fungal *** This study presents a comprehensive investigation of the response of soil microbial communities to aeolian erosion–deposition and grazing in a semi-arid grassland. Our findings indicate that microbial communities in the semi-arid grassland show resistance to external disturbances and that light grazing mitigates the effects of aeo-lian erosion–deposition on microbial co

关键词： Semi-arid grassland Erosion Grazing Soil microbial community network Deposition

一种考虑关节跃度约束的实时刀具路径光顺算法

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中国机械工程 2024年第2期35卷 280-286页

作者：杜煦常泽鑫郑军强任鹏飞浙江理工大学机械工程学院杭州310018 杭州电子科技大学机械工程学院杭州310018

针对机器人加工过程中关节跃度超过约束的问题,提出一种考虑机器人关节跃度约束的刀具路径光顺算法。采用有限冲激响应滤波器插值算法对五轴刀具路径进行光顺处理,一步完成了路径光顺和速度规划。建立了关节与刀具之间的速度、加速度和... 详细信息

针对机器人加工过程中关节跃度超过约束的问题,提出一种考虑机器人关节跃度约束的刀具路径光顺算法。采用有限冲激响应滤波器插值算法对五轴刀具路径进行光顺处理,一步完成了路径光顺和速度规划。建立了关节与刀具之间的速度、加速度和跃度关系,通过调整时间常数保证了关节跃度不超过约束。考虑机器人关节加速度约束后,该算法计算出的时间常数更小。仿真和实验结果表明该算法能减小关节的跟踪误差,提高机器人的工作稳定性。

关键词：关节跃度约束五轴刀具路径光顺有限冲激响应滤波器插值机器人加工

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基于弯曲元试验的微生物注浆过程中剪切波速测定

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工业建筑 2024年第9期54卷 51-56页

作者：韩智光郑俊强河南大学土木建筑学院河南开封475004 河南大学生命科学学院河南开封475004

微生物加固可液化砂土的效果,受注浆过程中细菌体积、传输速率、孔隙再分布等因素的影响。且在实际应用过程中因试件制备造成其内部质量、密度等差异,导致难以科学判断试样内部微生物的具体成矿效果,严重影响其现场应用。过往的微生物... 详细信息

微生物加固可液化砂土的效果,受注浆过程中细菌体积、传输速率、孔隙再分布等因素的影响。且在实际应用过程中因试件制备造成其内部质量、密度等差异,导致难以科学判断试样内部微生物的具体成矿效果,严重影响其现场应用。过往的微生物加固试验研究多为单元尺度,而砂柱尺度应用较少。因此,在砂柱(长度0.5 m)上,通过自行研制的多点弯曲元多通道实时剪切波速测量装置,在微生物注浆过程中进行多位点实时监测,分段表达试件中微生物的成矿效果,藉此系统研究试件内部微生物诱导碳酸钙沉淀(MICP)的实时成矿规律。

关键词： MICP 砂柱剪切波速弯曲元多通道监测系统

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Pathway Matters: Prefrontal Control of Negative Emotions via Distinct Downstream Regions

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Neuroscience Bulletin 2022年第2期38卷 226-228页

作者： junqiang zheng Na Liu Han Xu Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital Zhejiang University School of MedicineHangzhou 310058China NHC and CAMS Key Laboratory of Medical Neurobiology MOE Frontier Science Center for Brain Research and Brain-Machine IntegrationSchool of Brain Science and Brain MedicineZhejiang UniversityHangzhou 310058China

The infralimbic cortex(IL)is a major subregion of the medial prefrontal cortex(mPFC)that is essential for many advanced brain functions including *** studies have unraveled a critical role of the IL in the processing of negative emotions such as fear and ***,these studies also generate controversial data regarding the precise functions of the IL in the regulation of either fear or *** one hand,pharmacological inactivation of the IL attenuates anxiety-like behaviors and consistently,pharmacological activation of the IL produces anxiety-like behaviors[1].

关键词： inactivation precise Mount

Lighting up Oxytocin Neurons to Nurture the Brain

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Neuroscience Bulletin 2023年第5期39卷 866-868页

作者： Fang Zhou junqiang zheng Han Xu Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital Zhejiang University School of MedicineHangzhou 310058China Liangzhu Laboratory MOE Frontier Science Center for Brain Science and Brain-machine IntegrationState Key Laboratory of Brain-machine IntelligenceZhejiang UniversityHangzhou 311121China NHC and CAMS Key Laboratory of Medical Neurobiology Zhejiang UniversityHangzhou 310058China

The sensory system develops earlier than the systems responsible for higher brain functions such as language and cognition[1].Moreover,sensory experiences in early life are critical for the development of the ***,how sensory experiences shape brain development is an important yet unresolved question in *** work has demonstrated that deprivation of sensory inputs in the early developmental stage causes synaptic dysfunction in the sensory ***,it has been reported that oxytocin can restore the deficits caused by somatosensory deprivation in neonatal mice,suggesting that oxytocin may play a key role in sensory-mediated synaptogenesis[2].Vision is one of the most important sensory inputs during early development in mammalians including humans[1],but the neural mechanism underlying vision-mediated brain development is still largely unknown.

关键词： neonatal neural sensory

Zigbee的阅览室环境监控系统设计与实现

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福建电脑 2024年第9期40卷 95-99页

作者：王伟生郑俊强福建信息职业技术学院物联网与人工智能学院福州350000

为有效监控图书馆阅览室温湿度、一氧化碳、光照等参数,本文提出了一种基于Zigbee无线传感网技术的阅览室环境监控系统。系统基于物联网“感知层、网络层、应用层”三层体系来设计整体框架,采用CC2530微控制器来设计Zigbee的终端节点和... 详细信息

为有效监控图书馆阅览室温湿度、一氧化碳、光照等参数,本文提出了一种基于Zigbee无线传感网技术的阅览室环境监控系统。系统基于物联网“感知层、网络层、应用层”三层体系来设计整体框架,采用CC2530微控制器来设计Zigbee的终端节点和网关节点模块,构建具有数据显示、策略设置、传感器设置、执行器设置等功能的阅览室环境监控云平台。模拟测试的结果表明,系统可有效实现阅览室温湿度和控制灯光照明的自动调节,具备实时推送天气信息、监控火警的功能,为阅览室环境监控提供了低成本、易部署的一种可行性解决方案。

关键词： Zigbee技术图书阅览室环境监控云平台

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Rapid Eye Movement Sleep Consolidates Social Memory

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Neuroscience Bulletin 2023年第10期39卷 1598-1600页

作者： Jingkai Fan Fang Zhou junqiang zheng Han Xu Department of Neurobiology and Department of Neurology of the Second Afliated Hospital Zhejiang University School of MedicineHangzhou 310058China Liangzhu Laboratory MOE Frontier Science Center for Brain Science and Brain-Machine IntegrationState Key Laboratory of Brain-Machine IntelligenceZhejiang UniversityHangzhou 311121China NHC and CAMS Key Laboratory of Medical Neurobiology Zhejiang UniversityHangzhou 310058China Key Laboratory of Novel Targets and Drug Study for Neural Repair of Zhejiang Province School of MedicineHangzhou City UniversityHangzhou 310015China

Social memory is one of declarative memory which is essential for animals to exhibit appropriate social *** suggests that the hippocampus,particularly the CA2 region,plays an important role in encoding and consolidating social memory[1].Rapid eye movement(REM)sleep has been suggested to contribute to social memory consolidation by up-regulating synaptic plasticity,local field potentials,and dendritic activity[2].

关键词： memory plasticity consolidation

A Standardized Protocol for the Induction of Specific Social Fear in Mice

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Neuroscience Bulletin 2021年第12期37卷 1708-1712页

作者： junqiang zheng Yuanyuan Tian Haifeng Xu Linfan Gu Han Xu Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital Zhejiang University School of MedicineHangzhou 310058China NHC and CAMS Key Laboratory of Medical Neurobiology MOE Frontier Science Center for Brain Science and BrainMachine IntegrationSchool of Brain Science and Brain MedicineZhejiang UniversityHangzhou 310058China

Dear Editor,Social anxiety disorder(SAD)is one of the most common psychiatric *** is characterized by intense and persistent fear of one or more social situations in which one is exposed to possible scrutiny by others[1].The lifetime prevalence of SAD ranges from 0.2%to 13%,with higher prevalence in high-income *** SAD can last a lifetime and is often accompanied by impairments in social life,which severely compromises the quality of ***,SAD is associated with a higher risk of other mental and physical disorders including depressive disor-ders,substance abuse disorders,general anxiety disorders,and cardiovascular diseases[2].

关键词： prevalence lifetime cardiovascular

Sleeve Design of Permanent-magnet Machine for Low Rotor Losses

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Chinese Journal of Electrical Engineering 2020年第4期6卷 86-96页

作者： junqiang zheng Wenxiang Zhao Jinghua Ji Jihong Zhu Christopher H.T.Lee School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013China Department of Computer Science and Technology Tsinghua UniversityBeijing 100000China School of Electrical and Electronic Engineering Nanyang Technological University639798Singapore

In this study,a novel rotor sleeve for permanent-magnet(PM)machines equipped with fractional-slot concentrated-windings(FSCW)is *** the newly designed rotor sleeve,the rotor eddy-current(EC)losses are significantly reduced,and the torque density of the machine is ***,the rotor EC losses of a surface-mounted PM machine with the sleeve are ***,the sleeve EC barriers and PM segmentation technologies for the suppression of the rotor EC losses are ***,an FSCW PM machine with the newly designed sleeve is proposed and optimized for a given set of *** electromagnetic and mechanical performances are evaluated by the finite element method(FEM).Finally,three assembling methods are presented and assessed comprehensively in terms of their merits and drawbacks.

关键词： Permanent-magnet machine rotor losses sleeve eddy-current concentrated-windings