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基于改进模糊PID果园双轮移动机器人运动控制

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农机化研究 2024年第7期46卷 14-20页

作者：张智超闵淑辉廖凯万斌李立君范子彦中南林业科技大学机电工程学院长沙410000

针对果园双轮机器人在果园路面移动时难平衡、易失稳的问题,提出了一种基于改进萤火虫算法优化的模糊比例-积分-微分(PID)控制策略。首先,根据机器人与果园不平整路面特点,建立其动力学状态空间模型;第二,阐述改进萤火虫算法原理并用其... 详细信息

针对果园双轮机器人在果园路面移动时难平衡、易失稳的问题,提出了一种基于改进萤火虫算法优化的模糊比例-积分-微分(PID)控制策略。首先,根据机器人与果园不平整路面特点,建立其动力学状态空间模型;第二,阐述改进萤火虫算法原理并用其优化控制器模糊规则;第三,利用MatLab/Simulink软件对机器人运动控制进行仿真试验;最后,为检验所提出算法的可行性,建立对比试验。研究结果表明:改进萤火虫算法优化的模糊PID控制器实现了果园双轮移动机器人的稳定运动功能,到达稳定的时间与最大倾角较传统PID控制器分别减少了3.9s和20.4°。

关键词：果园双轮移动机器人平衡控制改进萤火虫算法模糊PID控制

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特快速空间辐射暂态电磁场测量装置研究

中国测试 2024年第7期50卷 115-123页

作者：完朋朋吴细秀杨涛文博侯博文龙国华武汉理工大学湖北武汉430070 贵州电网有限责任公司电力科学研究院贵州贵阳550002 国网江西省电力有限公司电力科学研究院江西南昌330096

为研究隔离开关操作条件下GIS的瞬态辐射电磁场特性,该文开展特快速高频辐射电磁场测量装置的研制。开关操作辐射电磁场具有上升陡度大、幅值高、频带宽等特点,因此该文选择双锥天线和电小环天线进行电场和磁场的测量,设计特快速辐射电... 详细信息

为研究隔离开关操作条件下GIS的瞬态辐射电磁场特性,该文开展特快速高频辐射电磁场测量装置的研制。开关操作辐射电磁场具有上升陡度大、幅值高、频带宽等特点,因此该文选择双锥天线和电小环天线进行电场和磁场的测量,设计特快速辐射电场、磁场与VFTO联合测量方案。通过特快速高频辐射电磁场测量装置对550 kV GIS试验平台隔离开关操作产生的特快速辐射电场、磁场进行测量。结果表明:开关操作时GIS变电站电磁环境极其恶劣,分闸时电场强度可达3.5 kV/m,磁场强度可达220 A/m;合闸时电场强度为2.5 kV/m,磁场强度为150 A/m。单次脉冲持续时间约5μs,主要频率成分为8 MHz,46 MHz,58 MHz。

关键词：隔离开关电磁辐射天线数据处理单次脉冲 GIS

肺移植患者居家肺康复自我管理行为决策体验的质性研究

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军事护理 2024年第2期41卷 39-42页

作者：张莹湘蔡英华周海琴万霞王姗赵庆南京医科大学附属无锡人民医院肺移植中心江苏无锡214023 无锡市人民医院老年科江苏无锡214023 南京医科大学护理学院江苏南京211166 无锡市人民医院心内科

目的探讨肺移植患者居家肺康复自我管理行为决策体验。方法采用目的抽样对某三级甲等医院复诊的16名肺移植患者进行半结构式访谈,采用解释现象学分析法进行资料分析。结果共提炼出7个亚主题,归纳为3个主题,包括:行为态度、身心感知牵动... 详细信息

目的探讨肺移植患者居家肺康复自我管理行为决策体验。方法采用目的抽样对某三级甲等医院复诊的16名肺移植患者进行半结构式访谈,采用解释现象学分析法进行资料分析。结果共提炼出7个亚主题,归纳为3个主题,包括:行为态度、身心感知牵动决策态度;主观规范,社会因素驱动决策信念;知觉行为控制,自我感知左右决策意向。结论肺移植患者居家健康管理可通过强化行为决策心理体验的正向反馈、完善社会支持网络下患者主动参与决策机制,以及探索构建肺移植患者居家健康管理社区扶助模式,改善其居家肺康复自我管理行为。

关键词：肺移植肺康复自我管理质性研究护理

Donor-derived infections among Chinese donation after cardiac death liver recipients

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World Journal of Gastroenterology 2017年第31期23卷 5809-5816页

作者： Qi-Fa Ye Wei Zhou Qi-Quan wan Department of Transplant Surgery the Third Xiangya Hospital of Central South University Department of Transplant Surgery Zhongnan Hospital of Wuhan University

AIM To investigate blood cultures of deceased donors and report the confirmed transmission of bacterial infection from donors to liver *** We retrospectively studied the results of blood cultures among our donation after cardiac death(DCD) donors and calculated the donor-derived bacterial infection rates among liver recipients. Study participants underwent liver transplantation between January 1, 2010 and February 1, 2017. The study involved a total of 67 recipients of liver grafts from 67 DCD donors. We extracted the data of donors' and patients' characteristics, culture results and clinical outcomes, especially the post-transplant complications in liver recipients, from electronic medical records. We analyzed the characteristics of the donors and the corresponding liver recipients with emphasis put on donor-derived *** Head trauma was the most common origin of death among our 67 DCD donors(46.3%). Blood taken prior to the procurement operation was cultured for 53 of the donors, with 17 episodes of bloodstream infections developing from 13 donors. The predominant organism isolated from the blood of donors was Gram-positive bacteria(70.6%). Only three(4.5%) of 67 liver recipients developed confirmed donor-derived bacterial infections,with two isolates of multidrug-resistant Klebsiella pneumoniae and one isolate of multidrug-resistant Enterobacter aerogenes. The liver recipients with donorderived infections showed relation to higher crude mortality and graft loss rates(33.3% each) within 3 mo post transplantation, as compared to those without donor-derived infections(9.4% and 4.7%, respectively). All three liver recipients received appropriate antimicrobial *** Liver recipients have high occurrence of donor-derived infections. The liver recipients with donor-derived multidrug-resistant Enterobacteriaceae infections can have good outcome if appropriate antimicrobial therapy is given.

关键词： Liver transplant Donation after cardiac death donor Infection Multidrug resistant Bacteria Transmission

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Buck型单开关整合式功率因数校正变换器

电源学报 2024年第1期22卷 49-56页

作者：文娅万宇阳刘雪山肖剑桥王海东四川大学电气工程学院成都610065

传统的Buck功率因数校正PFC(power factor correction)变换器存在谐波电流大的缺点,限制了其应用范围。提出并分析了一种Buck型单开关整合式功率因数校正变换器。该变换器由一个Buck PFC变换器和一个Buck-Boost PFC变换器通过一个开关... 详细信息

传统的Buck功率因数校正PFC(power factor correction)变换器存在谐波电流大的缺点,限制了其应用范围。提出并分析了一种Buck型单开关整合式功率因数校正变换器。该变换器由一个Buck PFC变换器和一个Buck-Boost PFC变换器通过一个开关管整合而成,简化了控制;同时,采用恒导通时间控制,消除了Buck PFC变换器输入电流的死区;结合Buck和Buck-Boost变换器的优势,在全输入电压范围下可以实现高功率因数和高效率。介绍并分析了该变换器的电路结构、工作原理、稳态特性以及设计思路,最后,搭建了一台56 W的实验样机,验证了分析结果的正确性。

关键词：功率因数校正电流谐波 Buck PFC变换器整合式

Is the treatment outcome of hepatocellular carcinoma inferior in elderly patients?

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World Journal of Gastroenterology 2019年第27期25卷 3563-3571页

作者： Kevin Ka wan Chu Kenneth Siu Ho Chok Department of Surgery Queen Mary HospitalHong KongChina Department of Surgery and State Key Laboratory for Liver Research The University of Hong KongHong KongChina

In view of the increasing life expectancy in different parts of the world, a larger proportion of elderly patients with hepatocellular carcinoma(HCC) requiring oncological treatment is expected. The clinicopathological characteristics of HCC in elderly patients and in younger patients are different. Elderly patients, in general, also have more comorbidities. Evaluation of the efficacy of different HCC treatment options in elderly patients is necessary to optimize treatment outcomes for them. Treatment modalities for HCC include hepatectomy, liver transplantation, radiofrequency ablation, transarterial chemoembolization, and molecular-targeted therapy with sorafenib. In this review, current evidence on the risks and outcomes of the different HCC treatments for elderly patients are discussed. According to data in the literature, elderly patients and younger patients benefited similarly from HCC treatments. More clinical data are needed for the determination of selecting criteria on elderly HCC patients to maximize their chance of getting the most appropriate and effective treatments. As such,further studies evaluating the outcomes of different HCC treatment modalities in elderly patients are warranted.

关键词： Hepatocellular carcinoma Aged Clinical outcome Surgery Hepatectomy

Comparative numerical and experimental study of two combined wind and wave energy concepts

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Journal of Ocean Engineering and Science 2016年第1期1卷 36-51页

作者： Zhen Gao Torgeir Moan Ling wan Constantine Michailides Centre for Ships and Ocean Structures Norwegian University of Science and TechnologyTrondheimNorway Centre for Autonomous Marine Operations and Systems Norwegian University of Science and TechnologyTrondheimNorway Department of Marine Technology Norwegian University of Science and TechnologyTrondheimNorway

With a successful and rapid development of offshore wind industry and increased research activities on wave energy conversion in recent years,there is an interest in investigating the technological and economic feasibility of combining offshore wind turbines(WTs)with wave energy converters(WECs).In the EU FP7 MARINA Platform project,three floating combined concepts,namely the spar torus combination(STC),the semi-submersible flap combination(SFC)and the oscillating water column(OWC)array with a wind turbine,were selected and studied in detail by numerical and experimental *** paper summarizes the numerical modeling and analysis of the two concepts:STC and SFC,the model tests at a 1:50 scale under simultaneous wave and wind excitation,as well as the comparison between the numerical and experimental *** operational and survival wind and wave conditions were *** numerical analysis was based on a time-domain global model using potential flow theory for hydrodynamics and blade element momentum theory(for SFC)or simplified thrust force model(for STC)for *** techniques for model testing of combined wind and wave concepts were discussed with focus on modeling of wind turbines by disk or redesigned small-scale rotor and modeling of power take-off(PTO)system for wave energy conversion by pneumatic damper or hydraulic rotary *** order to reduce the uncertainty due to scaling,the numerical analysis was performed at model scale and both the numerical and experimental results were then up-scaled to full scale for *** comparison shows that the current numerical model can well predict the responses(motions,PTO forces,power production)of the combined concepts for most of the ***,the linear hydrodynamic model is not adequate for the STC concept in extreme wave conditions with the torus fixed to the spar at the mean water level for which the wave slamming on the torus occurs and this requires further investigati

关键词： Combined wind and wave energy concept Floating wind turbine Wave energy converter Numerical analysis Model test.

基于重测序的BBLa过表达烟草雄性不育变异检测分析

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种子 2024年第2期43卷 37-43页

作者：王麟麒罗徐万克石远帅崔杨子力刘洋贵州大学烟草学院/贵州省烟草品质研究重点实验室贵阳550025

BBLa基因编码小檗碱桥状酶(Berberine bridge enzyme-like, BBLa),烟草小檗碱桥状酶参与烟碱生物合成的最终催化步骤。课题组前期研究发现,BBLa过表达烟草T0代植株中出现雄蕊败育表型。为进一步了解该雄性不育表型的遗传机制,本研究以... 详细信息

BBLa基因编码小檗碱桥状酶(Berberine bridge enzyme-like, BBLa),烟草小檗碱桥状酶参与烟碱生物合成的最终催化步骤。课题组前期研究发现,BBLa过表达烟草T0代植株中出现雄蕊败育表型。为进一步了解该雄性不育表型的遗传机制,本研究以过表达BBLa烟草雄性不育表型OE1和野生型烟草WT为材料,基于全基因组重测序技术,对单核苷酸多态性(SNP)、插入-缺失(InDel)及染色体结构变异(SV)3种变异类型进行标记注释,平均测序深度≥14×,平均覆盖率≥95%。结果表明,在2个样本中共检测到7 505 620个SNP、628 034个InDel、79 576个SV。通过2个样本的SNP差异比对筛选,最终得到174个候选基因。

关键词：烟草重测序 BBLa基因雄性不育

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深圳市水利发展规划中智慧水利指标体系研究

人民长江 2024年第2期55卷 252-258页

作者：许波刘万皓董增川洪娴陈振飞浙江省水文管理中心浙江杭州310009 水利部水文仪器及岩土工程仪器质量监督检验测试中心江苏南京210012 河海大学水文水资源学院江苏南京210098 浙江水文新技术开发经营有限公司浙江杭州310009 中国电建集团华东勘测设计研究院有限公司浙江杭州311122

针对传统水利发展规划中信息化指标存在的重视程度不高、代表性不足、引领性不强等问题,以深圳市水务数字化转型为目标导向,分析了水务数字化转型的内涵及实施路径。结合深圳市智慧水务现状与不足,从软硬件设施建设、关键能力打造、建... 详细信息

针对传统水利发展规划中信息化指标存在的重视程度不高、代表性不足、引领性不强等问题,以深圳市水务数字化转型为目标导向,分析了水务数字化转型的内涵及实施路径。结合深圳市智慧水务现状与不足,从软硬件设施建设、关键能力打造、建设成效等方面出发构建了包含1个一级指标、3个二级指标、8个三级指标的深圳市水务发展“十四五”规划智慧水务指标体系,并详细说明了指标设置的业务需求、定义、计算方法和目标值。研究表明,该指标体系具备发展规划所需的引领性、代表性及考核性,对各地各级水利发展规划中智慧水利指标的设置具有一定的借鉴意义。

关键词：智慧水利发展规划指标体系数字化转型

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