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潜艇鱼雷攻击行为决策模型的Petri网描述

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系统仿真学报 2008年第S2期20卷 187-189,208页

作者：魏石川刘剑温洪黄文斌海军潜艇学院青岛266071

潜艇使用鱼雷攻击水面舰艇目标的战术过程是一个复杂的离散事件过程,该过程中各个原子行为的转换是由各种基本战术规则和随机战场态势决定的。由于Petri网对并行、异步和因果关系的离散事件仿真系统具有很强的可视化表述能力,可以通过... 详细信息

潜艇使用鱼雷攻击水面舰艇目标的战术过程是一个复杂的离散事件过程,该过程中各个原子行为的转换是由各种基本战术规则和随机战场态势决定的。由于Petri网对并行、异步和因果关系的离散事件仿真系统具有很强的可视化表述能力,可以通过运行时对变迁的不同扫描顺序揭示系统的动态行为,因此非常适用于潜艇鱼雷攻击行为决策模型战术过程描述。通过Petri网实现潜艇鱼雷攻击过程的行为决策模型,提出了解决冲突变迁和并发行为的方法,并对目标变机动、搜索丢失目标及发现来袭鱼雷等多种突发事件及决策做出讨论,较为全面地描述了潜艇鱼雷攻击水面舰艇目标的行为决策过程,旨在为进一步研究潜艇CGF鱼雷攻击战术行为决策奠定基础。

关键词：行为决策模型 Petri网计算机生成兵力鱼雷攻击

Gut microbiota-astrocyte axis: new insights into age-related cognitive decline

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Neural Regeneration Research 2025年第4期20卷 990-1008页

作者： Lan Zhang Jingge wei Xilei liu Dai Li Xiaoqi Pang Fanglian Chen Hailong Cao Ping Lei Haihe Laboratory of Cell Ecosystem Department of GeriatricsTianjin Medical University General HospitalTianjinChina Tianjin Geriatrics Institute Tianjin Medical University General HospitalTianjinChina Department of Gastroenterology and Hepatology Tianjin Medical University General HospitalNational Key Clinical SpecialtyTianjin Institute of Digestive DiseasesTianjin Key Laboratory of Digestive DiseasesTianjinChina Department of Urology Tianjin Medical University General HospitalTianjinChina Tianjin Neurological Institution Tianjin Medical University General HospitalTianjinChina

With the rapidly aging human population,age-related cognitive decline and dementia are becoming increasingly prevalent *** is considered the main risk factor for cognitive decline and acts through alterations in the composition of the gut microbiota,microbial metabolites,and the functions of *** microbiota–gut–brain axis has been the focus of multiple studies and is closely associated with cognitive *** article provides a comprehensive review of the specific changes that occur in the composition of the gut microbiota and microbial metabolites in older individuals and discusses how the aging of astrocytes and reactive astrocytosis are closely related to age-related cognitive decline and neurodegenerative *** article also summarizes the gut microbiota components that affect astrocyte function,mainly through the vagus nerve,immune responses,circadian rhythms,and microbial ***,this article summarizes the mechanism by which the gut microbiota–astrocyte axis plays a role in Alzheimer’s and Parkinson’s *** findings have revealed the critical role of the microbiota–astrocyte axis in age-related cognitive decline,aiding in a deeper understanding of potential gut microbiome-based adjuvant therapy strategies for this condition.

关键词： age aging Alzheimer’s disease astrocytes cognitive decline dementia gut microbiota gut–brain axis microbial metabolites neuroinflammation Parkinson’s disease

潜器浮力均衡与自动定深微机控制系统的仿真与设计

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信息与控制 1986年第5期 21-26页

作者：俞忠原施小成刘伟哈尔滨船舶工程学院

本文介绍潜器浮力均衡与自动定深微机控制系统的数模混合仿真试验及其控制软件与控制器的开发.经海上实船试验证明,仿真试验是成功的.

关键词：潜器垂直方向浮力调节自动定深微机控制计算机控制

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先验信噪比估计语音增强算法的对比分析

烟台大学学报（自然科学与工程版） 2017年第2期30卷 147-154页

作者：沈锁金欧世峰刘伟魏静烟台大学光电信息科学技术学院山东烟台264005

先验信噪比估计精度直接影响着语音增强算法的性能.本文对3种不同的先验信噪比估计算法:经典的直接判决算法、两步噪声消除算法和改进型直接判决算法的优缺点进行了理论分析和实验验证.实验部分包括:语谱、输出先验信噪比跟踪曲线、不... 详细信息

先验信噪比估计精度直接影响着语音增强算法的性能.本文对3种不同的先验信噪比估计算法:经典的直接判决算法、两步噪声消除算法和改进型直接判决算法的优缺点进行了理论分析和实验验证.实验部分包括:语谱、输出先验信噪比跟踪曲线、不同背景噪声下的输出对数似然比图像、不同背景噪声下输出的分段信噪比图像和不同噪声下输出的短时客观可懂度图像.此外,分析了直接判决算法的平滑因子的取值对音乐噪声和语音失真的影响.

关键词：先验信噪比语音增强音乐噪声语音失真平滑因子

Enhancement of motor functional recovery in thoracic spinal cord injury: voluntary wheel running versus forced treadmill exercise

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Neural Regeneration Research 2025年第3期20卷 836-844页

作者： Do-Hun Lee Dan Cao Younghye Moon Chen Chen Nai-Kui liu Xiao-Ming Xu wei Wu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteIndiana University School of MedicineIndianapolisINUSA Department of Neurological Surgery Indiana University School of MedicineIndianapolisINUSA Department of Neuroscience Baylor College of MedicineHoustonTXUSA

Spinal cord injury necessitates effective rehabilitation strategies, with exercise therapies showing promise in promoting recovery. This study investigated the impact of rehabilitation exercise on functional recovery and morphological changes following thoracic contusive spinal cord injury. After a 7-day recovery period after spinal cord injury, mice were assigned to either a trained group(10 weeks of voluntary running wheel or forced treadmill exercise) or an untrained group. Bi-weekly assessments revealed that the exercise-trained group, particularly the voluntary wheel exercise subgroup, displayed significantly improved locomotor recovery, more plasticity of dopaminergic and serotonin modulation compared with the untrained group. Additionally, exercise interventions led to gait pattern restoration and enhanced transcranial magnetic motor-evoked potentials. Despite consistent injury areas across groups, exercise training promoted terminal innervation of descending axons. In summary, voluntary wheel exercise shows promise for enhancing outcomes after thoracic contusive spinal cord injury, emphasizing the role of exercise modality in promoting recovery and morphological changes in spinal cord injuries. Our findings will influence future strategies for rehabilitation exercises, restoring functional movement after spinal cord injury.

关键词： behavioral assessment motor function neural plasticity running wheel exercise spinal cord injury treadmill exercise voluntary exercise

A novel flexible nerve guidance conduit promotes nerve regeneration while providing excellent mechanical properties

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Neural Regeneration Research 2025年第7期20卷 2084-2094页

作者： Tong Li Quhan Cheng Jingai Zhang Boxin liu Yu shi Haoxue Wang Lijie Huang Su Zhang Ruixin Zhang Song Wang Guangxu Lu Peifu Tang Zhongyang liu Kai Wang Department of Orthopedics the Fourth Medical Center of Chinese PLA General HospitalBeijingChina Department of Training and Sports Medicine Characteristic Medical Center of Chinese People’s Armed Police ForceTianjinChina Medical School of Chinese PLA BeijingChina Key Laboratory of Bioactive Materials for the Ministry of Education College of Life SciencesNankai UniversityTianjinChina Department of Orthopedics Tianjin HospitalTianjinChina Department of Rehabilitation Medicine Er Quan Hospital of PAPWuxiJiangsu ProvinceChina

Autografting is the gold standard for surgical repair of nerve defects>5 mm in length;however,autografting is associated with potential complications at the nerve donor *** an alternative,nerve guidance conduits may be *** ideal conduit should be flexible,resistant to kinks and lumen collapse,and provide physical cues to guide nerve *** designed a novel flexible conduit using electrospinning technology to create fibers on the innermost surface of the nerve guidance conduit and employed melt spinning to align ***,we prepared disordered electrospun fibers outside the aligned fibers and helical melt-spun fibers on the outer wall of the electrospun fiber *** presence of aligned fibers on the inner surface can promote the extension of nerve cells along the *** helical melt-spun fibers on the outer surface can enhance resistance to kinking and compression and provide *** novel conduit promoted nerve regeneration and functional recovery in a rat sciatic nerve defect model,suggesting that it has potential for clinical use in human nerve injuries.

关键词： aligned fibers anti-kinking helical fibers nerve guidance conduit nerve regeneration peripheral nerve injury topological guidance

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问题本位学习在法学教学中的应用

巢湖学院学报 2017年第2期19卷 131-136页

作者：施玮刘捷高瑞霞巢湖学院安徽巢湖238000

问题本位学习要求教师充分激发学生主动学习的意愿,通过师生交流引导学生主动学习,以提升学生的问题解决能力。本研究探讨问题本位学习的教学方法在法学教学中的应用,结合教学实际提出问题本位学习导向下的教学步骤。问题本位学习教学... 详细信息

问题本位学习要求教师充分激发学生主动学习的意愿,通过师生交流引导学生主动学习,以提升学生的问题解决能力。本研究探讨问题本位学习的教学方法在法学教学中的应用,结合教学实际提出问题本位学习导向下的教学步骤。问题本位学习教学方法能调动学生的学习自主性与积极性,提高法学教学质量。

关键词：问题本位学习法学教学教学改革

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现代教育技术专业硕士知能课程体系构建研究

电化教育研究 2018年第4期39卷 80-85页

作者：李华张立勇石夏榕魏一通刘勐媛西北师范大学教育技术学院甘肃兰州730070

现代教育技术专业硕士研究生社会市场需求侧与人才供给侧的矛盾,使得现代教育技术专业的发展面临严峻挑战。研究从社会对现代教育技术专业硕士的职业需求和能力要求出发,以中小学信息技术教师、中小学信息化学科教师、教学设计师、行业... 详细信息

现代教育技术专业硕士研究生社会市场需求侧与人才供给侧的矛盾,使得现代教育技术专业的发展面临严峻挑战。研究从社会对现代教育技术专业硕士的职业需求和能力要求出发,以中小学信息技术教师、中小学信息化学科教师、教学设计师、行业培训师及信息化管理人员等热门就业方向为例,针对目前现代教育技术专业存在的课程结构失调、学生能力不专等方面的问题,以能力需求为导向,进行知识需求与课程设置的探索,提出了能力与知识并重的现代教育技术专业知能课程体系,以增强现代教育技术专业硕士研究生未来就业的竞争力,满足社会市场需求,解决人才供给的矛盾。

关键词：现代教育技术专业硕士知能课程体系

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发动机连杆在恒定振幅载荷下的应力疲劳分析

机械制造与自动化 2017年第1期46卷 124-125页

作者：白帆刘峰史艳华刘伟辽宁石油化工大学机械工程学院辽宁抚顺113001 山东华鲁恒升化工股份公司山东德州253000

针对发动机连杆的应力疲劳(高周疲劳)形式,主要分析了其在恒定振幅载荷下的应力疲劳,运用ANSYS15.0有限元分析建立了三维有限元模型,并对其进行了定性和定量的评定,得到了发动机连杆在恒定载荷下的应力、应变云图以及安全系数,交替等效... 详细信息

针对发动机连杆的应力疲劳(高周疲劳)形式,主要分析了其在恒定振幅载荷下的应力疲劳,运用ANSYS15.0有限元分析建立了三维有限元模型,并对其进行了定性和定量的评定,得到了发动机连杆在恒定载荷下的应力、应变云图以及安全系数,交替等效应力,疲劳敏感度曲线图等,为发动机连杆的优化设计提供了数据参考。

关键词：发动机连杆恒定振幅载荷 ANSYS15.0 疲劳分析