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Distributed Matching Theory-Based Task Re-Allocating for Heterogeneous Multi-UAV Edge Computing

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China Communications 2024年第1期21卷 260-278页

作者： Yangang Wang Xianglin Wei hai Wang Yongyang Hu Kuang zhao Jianhua Fan College of Communications Engineering Army Engineering University of PLANanjing 210007China The Sixty-Third Research Institute National University of Defense TechnologyNanjing 210007China

Many efforts have been devoted to efficient task scheduling in Multi-Unmanned Aerial Vehicle(UAV)edge ***,the heterogeneity of UAV computation resource,and the task re-allocating between UAVs have not been fully considered ***,most existing works neglect the fact that a task can only be executed on the UAV equipped with its desired service function(SF).In this backdrop,this paper formulates the task scheduling problem as a multi-objective task scheduling problem,which aims at maximizing the task execution success ratio while minimizing the average weighted sum of all tasks’completion time and energy *** three coupled goals in a realtime manner with the dynamic arrival of tasks hinders us from adopting existing methods,like machine learning-based solutions that require a long training time and tremendous pre-knowledge about the task arrival process,or heuristic-based ones that usually incur a long decision-making *** tackle this problem in a distributed manner,we establish a matching theory framework,in which three conflicting goals are treated as the preferences of tasks,SFs and ***,a Distributed Matching Theory-based Re-allocating(DiMaToRe)algorithm is put *** formally proved that a stable matching can be achieved by our *** simulation results show that Di Ma To Re algorithm outperforms benchmark algorithms under diverse parameter settings and has good robustness.

关键词： edge computing heterogeneity matching theory service function unmanned aerial vehicle

PSG： a two-layer graph model for document summarization

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Frontiers of Computer Science 2014年第1期8卷 119-130页

作者： Heng CHEN hai JIN Feng zhao Service Computing Technology and System Lab & Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

Graph model has been widely applied in docu- ment summarization by using sentence as the graph node, and the similarity between sentences as the edge. In this paper, a novel graph model for document summarization is presented, that not only sentences relevance but also phrases relevance information included in sentences are utilized. In a word, we construct a phrase-sentence two-layer graph structure model （PSG） to summarize document（s） . We use this model for generic document summarization and query-focused sum- marization. The experimental results show that our model greatly outperforms existing work.

关键词： relationship graph Markov random walk doc-ument summarization

Adaptive Trajectory Tracking Control for Nonholonomic Wheeled Mobile Robots:A Barrier Function Sliding Mode Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 1007-1021页

作者： Yunjun Zheng Jinchuan Zheng Ke Shao Han zhao Hao Xie hai Wang the School of Mechanical Engineering Hefei University of TechnologyHefei 230009China the School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyHawthorn VIC 3122Australia the School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710072China the Shanghai Aerospace Control Technology Institute Shanghai 201109 the School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China the College of Science HealthEngineering and EducationMurdoch UniversityPerth WA6150Australia

The trajectory tracking control performance of nonholonomic wheeled mobile robots(NWMRs)is subject to nonholonomic constraints,system uncertainties,and external *** paper proposes a barrier function-based adaptive sliding mode control(BFASMC)method to provide high-precision,fast-response performance and robustness for *** with the conventional adaptive sliding mode control,the proposed control strategy can guarantee that the sliding mode variables converge to a predefined neighborhood of origin with a predefined reaching time independent of the prior knowledge of the uncertainties and disturbances *** advantage of the proposed algorithm is that the control gains can be adaptively adjusted to follow the disturbances amplitudes thanks to the barrier *** benefit is that the overestimation of control gain can be eliminated,resulting in chattering ***,a modified barrier function-like control gain is employed to prevent the input saturation problem due to the physical limit of the *** stability analysis and comparative experiments demonstrate that the proposed BFASMC can ensure the prespecified convergence performance of the NWMR system output variables and strong robustness against uncertainties/disturbances.

关键词： Adaptive sliding mode barrier function nonholonomic wheeled mobile robot(NWMR) trajectory tracking control

红鳍东方鲀(Takifugu rubripes)耐低温性状和生长性状遗传参数评估

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海洋与湖沼 2024年第2期55卷 517-525页

作者：赵海池刘志峰王新安包玉龙刘圣聪杨明超闫鹏飞马爱军海水养殖生物育种与可持续产出全国重点实验室、中国水产科学研究院黄海水产研究所、中国-东盟海水养殖技术“一带一路”联合实验室(青岛) 山东青岛266071 上海海洋大学水产与生命学院上海201306 唐山牧海水产养殖有限公司河北唐山063205

采用人工控温的方式,对构建的31个F1红鳍东方鲀(Takifugu rubripes)全同胞家系开展低温胁迫实验,获得耐低温性状低温累计存活时间(CDH),基于混合线性模型分别开展耐低温性状和生长性状遗传参数评估,对每一性状是否需要考虑共同环境效应... 详细信息

采用人工控温的方式,对构建的31个F1红鳍东方鲀(Takifugu rubripes)全同胞家系开展低温胁迫实验,获得耐低温性状低温累计存活时间(CDH),基于混合线性模型分别开展耐低温性状和生长性状遗传参数评估,对每一性状是否需要考虑共同环境效应所构建的两种模型进行似然比检验。结果显示,经似然比检验,最终选用模型A和模型BF进行耐低温和生长性状遗传评估;耐低温性状CDH遗传力为(0.27±0.08),属于中等遗传力;体重BW遗传力为(0.36±0.13),属于中等遗传力,体长BL遗传力为(0.14±0.06),属于低等遗传力,经检验,遗传力估计值均达到极显著水平(P<0.01)。CDH和体重、体长的遗传相关分别为(–0.40±0.22)和(–0.44±0.24),表型相关分别为(–0.09±0.06)和(–0.16±0.05),均为负相关;体重和体长之间的遗传相关为(0.92±0.05),表型相关为(0.80±0.02),呈正相关且结果极显著(P<0.01)。研究结果表明,红鳍东方鲀的耐低温性状和生长性状都具有较好的改良潜力,考虑到两性状间存在负遗传相关,在开展耐低温选育时,对首先不同性状进行品系选育,然后利用品系间杂交培育出耐高温、生长快的新品种。该项研究首次完成了红鳍东方鲀耐低温性状的遗传参数评估,为制订红鳍东方鲀耐低温选育育种规划提供了理论依据。

关键词：红鳍东方鲀(Takifugu rubripes) 耐低温性状遗传力遗传相关

Myocardial bridging phenomenon is not invariable:A case report

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World Journal of Clinical Cases 2022年第29期10卷 10721-10727页

作者： Hao-Hao Li Ming-Wang Liu Yang-Fang Zhang Bo-Ce Song Zheng-Chuan Zhu Fu-hai zhao Graduate School of Beijing University of Chinese Medicine Beijing 100029China Department of Cardiology Xiyuan HospitalChinese Academy of Chinese Medicine ScienceNational Clinical Research Center for Chinese Medicine CardiologyBeijing 100091China

BACKGROUND Myocardial bridging is a common anatomical malformation,and the milking effect is a characteristic phenomenon of myocardial bridging in coronary ***,the phenomenon is ***,this article reports an inconceivably rare myocardial bridging phenomenon that breaks through our conventional *** milking effect changed obviously in two coronary angiography examinations,which subverted the traditional deep-rooted view of the myocardial bridging phenomenon and revealed the limitations of coronary angiography in diagnosing myocardial bridging and judging the prognosis of *** SUMMARY A 63-year-old man was diagnosed with ST-segment elevation myocardial infarction and received primary percutaneous coronary intervention on December 26,*** heart rate was 104 beats per minute,and blood pressure was 15.3/10.3 kPa.A severe milking effect was found in the left anterior descending coronary artery during his index coronary angiography on January 14,*** patient was given intensive medical management,including aβ1-adrenergic receptor blocker,during hospitalization and after ***,coronary angiography showed that the previous impressive milking effect was dramatically alleviated(close to normal)at the follow-up on October 13,*** that moment,the patient’s heart rate was 83 beats per minute,and blood pressure was 12.7/8.0 *** The myocardial bridging phenomenon is not invariable and,in certain circumstances,may ***,the autonomic nervous system may be involved in the myocardial bridging phenomenon.

关键词： Myocardial bridging Milking effect Autonomic nervous system Endocrine system Coronary angiography Case report

Hydrogen storage thermodynamics and kinetics of as-cast Ce-Mg-Ni-based alloy

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Journal of Iron and Steel Research(International) 2024年第3期31卷 752-766页

作者： Yan Qi Xin Zhang Jun Li Dong-liang zhao Shi-hai Guo Yang-huan Zhang Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China China Rare Earth New Material(Weishan)Co..Ltd. Jining 277600ShandongChina Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010Inner MongoliaChina

The reaction kinetics of alloys based on magnesium are known to be greatly improved by the partial substitution of Mg with rare earths and transition metals,particularly *** enhanced superficial hydrogen dissociation rate,the weakened Mg-H bond and the lower activation energy following element replacement are thought to be related to the better *** experimental alloys Ce5Mg_(95-x)Ni_(x)(x=5,10,15)were smelted by the vacuum induction *** phase transformation and structural evolution of experimental alloys before and after reaction with hydrogen were char-acterized by X-ray diffraction,scanning electron microscopy and transmission electron *** cast specimens contain CeMg_(12),Mg and Mg_(2)Ni phases,and the increase in Ni content results in an obvious growth of Mg_(2)Ni *** isothermal and non-isothermal hydrogenation and dehydrogenation kinetics of the experimental specimens were investi-gated using the Sievert apparatus,differential scanning calorimetry and thermal gravimetric *** activation energy may be calculated using the Arrhenius and Kissinger *** experimental alloys have been shown to have good activation properties,with a reversible hydriding and dehydriding capacities of around 5.0 wt.%in the first *** initial dehydrogenation temperature of MgH_(2) decreases from 557.5 to 537.7 K with changing Ni content from 5 to 15 at.%.The dehydrogenation activation energy also reduces from 77.09 to 62.96 kJ/mol,which explains the improved hydrogen storage performance caused by Ni *** can be shown that the impact of Ni on the decomposition enthalpy of MgH_(2) is quite modest,with the absolute enthalpy(ΔHr)only decreasing from 78.48 to 76.15 kJ/mol.

关键词： Mg-based alloy Ni content Hydrogen storage kinetics Thermodynamic property Activation energy

磁共振动态增强半定量参数在子宫肌瘤射频消融治疗术后的评估价值

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黑龙江医学 2024年第2期48卷 182-184页

作者：王伟赵海兰岚宫术娟徐冉冉韩露张楠刘哲牛倩倩大庆油田总医院磁共振科黑龙江大庆163000 大庆市中医医院磁共振科黑龙江大庆163311 大庆油田总医院放射科黑龙江大庆163000 大庆油田总医院超声科黑龙江大庆163000

目的:应用磁共振动态增强(DCE-MRI)半定量参数评估子宫肌瘤射频治疗的疗效。方法:回顾性分析2015年1月—2020年4月大庆油田总医院经射频治疗的52例子宫肌瘤患者的临床资料。术前及术后行磁共振动态增强检查,测量达峰时间(time to peak,T... 详细信息

目的:应用磁共振动态增强(DCE-MRI)半定量参数评估子宫肌瘤射频治疗的疗效。方法:回顾性分析2015年1月—2020年4月大庆油田总医院经射频治疗的52例子宫肌瘤患者的临床资料。术前及术后行磁共振动态增强检查,测量达峰时间(time to peak,TTP)、最大浓度(maximum concentration,MAX Conc)、时间—浓度曲线下面积(area under the time concentration curve,AUC)及最大斜率(maximum slope,MAX Slope),并利用四组参数对病灶进行疗效评估。结果:TTp、MAX Conc、AUC、MAX Slope比较,差异有统计学意义(Z=-4.025、-5.929、-6.011、-5.646,P<0.05)。结论:磁共振动态增强半定量参数TTp、MAX Conc、AUC、MAX Slope在术后疗效评估中具有重要意义,可作为有效的评估手段。

关键词：磁共振动态增强半定量参数子宫肌瘤射频治疗术后评估

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响应面法优化紫菀多糖提取工艺及抗氧化活性

广州化工 2024年第6期52卷 115-119页

作者：蔡吉祥陈卓琳苏龙李大成赵海燕广西科技师范学院食品与生化工程学院广西来宾546119

为开发利用紫菀多糖资源,在单因素试验的基础上,通过响应面法优化了紫菀多糖的提取工艺,同时研究了紫菀多糖的抗氧化活性。结果表明:紫菀多糖的最佳工艺为微波时间116 s、微波功率600 W、液料比51 mL/g,在该工艺条件下紫菀多糖的得率为1... 详细信息

为开发利用紫菀多糖资源,在单因素试验的基础上,通过响应面法优化了紫菀多糖的提取工艺,同时研究了紫菀多糖的抗氧化活性。结果表明:紫菀多糖的最佳工艺为微波时间116 s、微波功率600 W、液料比51 mL/g,在该工艺条件下紫菀多糖的得率为18.36%;紫菀多糖浓度在300μg/mL时,对DPPH·自由基的清除率可达89.71%,IC_(50)值为173.25μg/mL,紫菀多糖溶液在600μg/mL时,对·OH自由基的清除率达66.70%,IC_(50)值为424.13μg/mL。

关键词：紫菀多糖响应面法微波辅助提取抗氧化活性

递增式抗阻运动联合营养治疗应用于接受维持性血液透析治疗的终末期肾脏病患者效果分析

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临床和实验医学杂志 2024年第3期23卷 265-270页

作者：韩苗苗田明杰赵海红孙东立宋江南唐山中心医院肾内科河北唐山063000 唐山中心医院临床营养科河北唐山063000

目的评价递增式抗阻运动联合营养治疗应用于接受维持性血液透析(MHD)治疗的终末期肾脏病(ESRD)患者的效果。方法本研究为回顾性分析,选取2023年1月至2023年6月在唐山中心医院接受MHD治疗的ESRD患者120例,按照随机数字表法将其分为3组,... 详细信息

目的评价递增式抗阻运动联合营养治疗应用于接受维持性血液透析(MHD)治疗的终末期肾脏病(ESRD)患者的效果。方法本研究为回顾性分析,选取2023年1月至2023年6月在唐山中心医院接受MHD治疗的ESRD患者120例,按照随机数字表法将其分为3组,即对照组(常规治疗)、营养治疗组(营养治疗)和营养运动组(递增式抗阻运动联合营养治疗),每组各40例。评价治疗6个月后3组的人体测量指标[身高、体重、体重指数、肱三头肌皮褶厚度(TSF)、上臂中围(MAC)、上臂肌围(MAMC)、营养指标(血红蛋白、前白蛋白和转铁蛋白)、主观综合性营养评估法(SGA)评分、6 min步行试验(6MWT)、“坐-立”体位试验(STS 10)]、生活质量[简明健康状况调查表(SF-36)]及不良事件发生情况等,并进行统计比较。结果营养运动组体重指数、TSF、MAC和MAMC分别为(23.29±2.34)kg/m^(2)、(12.56±1.88)mm、(26.37±2.20)cm、(22.42±2.01)cm,均明显高于对照组[(20.03±2.16)kg/m^(2)、(9.74±1.81)mm、(22.10±2.04)cm、(19.04±1.88)cm]和营养治疗组[(21.14±2.51)kg/m^(2)、(10.17±1.80)mm、(23.89±2.31)cm、(20.70±1.96)cm],差异均有统计学意义(P0.05)。结论递增式抗阻运动联合营养治疗可有效改善接受MHD治疗的ESRD患者的营养状况、躯体功能和生活质量,减少不良事件的发生。

关键词：终末期肾脏病维持性血液透析递增式抗阻运动营养治疗血红蛋白肌肉增长