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IRS和UAV-IRS共同辅助中继网络公平下行通信方案

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重庆邮电大学学报（自然科学版） 2024年第5期36卷 924-934页

作者：许满青张毅徐川徐小涛重庆邮电大学通信与信息工程学院重庆400065 国防科技大学信息通信学院武汉430019

针对长距离中继通信系统中地面用户(ground user,GU)公平性不足和系统灵活性不高的问题,提出一种智能反射面(intelligent reflecting surface,IRS)和机载智能反射面(unmanned aerial vehicle-IRS,UAV-IRS)共同辅助的中继网络多用户公平... 详细信息

针对长距离中继通信系统中地面用户(ground user,GU)公平性不足和系统灵活性不高的问题,提出一种智能反射面(intelligent reflecting surface,IRS)和机载智能反射面(unmanned aerial vehicle-IRS,UAV-IRS)共同辅助的中继网络多用户公平下行通信传输方案。为实现该中继网络下行链路的通信公平,通过联合优化系统通信调度、系统时隙分配参数、IRS和UAV-IRS反射相移矩阵以及UAV-IRS飞行轨迹来最大化系统用户最小吞吐量。由于该优化问题是非凸问题,将优化问题分解为4个非凸子问题,引入线性规划(linear programming,LP)、松弛变量和连续凸近似(successive convex approximations,SCA)等方法分别对4个子问题进行求解,通过交替优化(alternating optimization,AO)算法得到原非凸问题的近似解。仿真结果表明,所提方案在有效提升系统用户最小吞吐量的同时保障了多用户通信的公平性,并发现系统用户最小吞吐量与IRS和UAV-IRS的反射元件数量、UAV-IRS飞行轨迹以及IRS和中继所处地理位置等因素有关。

关键词：智能反射面无人机中继通信时隙分配

维普期刊数据库博看期刊

基于GWO-RFR的激光熔覆多道成形层形貌的预测方法

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材料热处理学报 2024年第2期45卷 174-183页

作者：毛恺奕杜彦斌何国华彭云川李志强重庆工商大学制造装备机构设计与控制重庆市重点实验室重庆400067

激光熔覆多道成形层形貌受激光熔覆过程中多个工艺参数的综合影响,为获得良好的熔覆层形貌,提出了一种基于灰狼优化(GWO)算法优化随机森林回归(RFR)算法(GWO-RFR)的激光熔覆多道成形层形貌预测方法。以12Cr13不锈钢为基体,Fe60为熔覆粉... 详细信息

激光熔覆多道成形层形貌受激光熔覆过程中多个工艺参数的综合影响,为获得良好的熔覆层形貌,提出了一种基于灰狼优化(GWO)算法优化随机森林回归(RFR)算法(GWO-RFR)的激光熔覆多道成形层形貌预测方法。以12Cr13不锈钢为基体,Fe60为熔覆粉末,设计试错法结合中心复合实验,测量成形层宽高比和稀释率。基于多道激光熔覆实验数据,建立激光熔覆工艺参数与成形层形貌间的GWO-RFR回归预测模型,并与RFR模型、响应面模型(RSM)的预测结果进行比较。结果表明:与RFR模型和RSM模型相比,GWO-RFR模型的预测结果和评价指标均优于RFR模型和RSM模型,GWO-RFR预测模型能够更准确地预测熔覆层形貌,更接近实际值,可为获得优异的激光熔覆多道成形层形貌提供理论依据。

关键词：激光熔覆形貌灰狼优化算法随机森林回归算法

厌氧-缺氧/滴滤/介质滤床处理油气站场生活污水

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中国给水排水 2024年第2期40卷 120-125页

作者：阚和科王云川黄文升吴义锋曹海兵徐亦非顾婧中石化石油工程设计有限公司山东东营257000 胜利油田鲁明油气勘探开发有限公司山东东营257000 东南大学能源与环境学院江苏南京210096

针对油气站场生活污水水量小、间歇排水、水量波动大等特点,采用耦合物化、生化和生态处理的恒水位厌氧-缺氧/竖向脉冲滴滤/介质滤床的污水处理工艺,以干湿交替运行方式实现站场的污水处理。以东营市鲁源管理站生活污水处理为例,该工程... 详细信息

针对油气站场生活污水水量小、间歇排水、水量波动大等特点,采用耦合物化、生化和生态处理的恒水位厌氧-缺氧/竖向脉冲滴滤/介质滤床的污水处理工艺,以干湿交替运行方式实现站场的污水处理。以东营市鲁源管理站生活污水处理为例,该工程污水处理量为5.0 m^(3)/d,恒水位厌氧-缺氧池的水力停留时间为1.2 d;脉冲滴滤池水力负荷为6.3 m^(3)/(m^(2)·d);介质滤床水力负荷为0.5 m^(3)/(m^(2)·d)。经过启动驯化和冬季过渡阶段,系统稳定运行,原水COD、NH_(4)^(+)-N、TN、TP的平均浓度分别为214.2、42.71、62.23、4.42 mg/L,出水相应指标的平均浓度分别为31.9、4.29、10.74、0.53 mg/L,平均去除率分别为85.1%、90.0%、82.7%和88.0%,满足《城市污水再生利用城市杂用水水质》(GB/T18920—2020)的绿化用水标准和《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。

关键词：油气站场生活污水厌氧-缺氧脉冲滴滤介质滤床

On the Star Chromatic Number of Graph Products

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Journal of Systems Science and Systems Engineering 2001年第2期13卷 244-246页

作者： XU chuan-liang 1, WANG yi-ju 21.Rizhao Vocational Technique College, Rizhao 276800, China2.Institute of Operations Research, Qufu Normal university, Qufu 273165, China Rizhao Vocational Technique College Rizhao 276800 China Institute of Operations Research Qufu Normal UniversityQufu 273165 China

The star chromatic number of a graph was introduced by A. Vince, which is a natural generalization of the chromatic number of a graph. In this paper, the star chromatic numbers of graph products GH are discussed... 详细信息

关键词： star-chromatic number graph product independent set

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang Yong-Hao Chen Jing-Yu Tang Rui-Rui Fan Qiang Li Gong Li Dong Liu Zheng-Yao Jin Xing-Zhu Cui Tian-Xiang Chen yi-Wei Yang Rong Liu Han yi Yang Li Zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping Cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao Min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-Zhu he Yong-Cheng he Yang Hong yi-Wei Hu Han-Xiong Huang Wei-Hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang Ling Kang Bo Li Chao Li Jia-Wen Li Xiao Li Jie Liu Shu-Bin Liu Guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-Hui Song Kang Sun Zhi-Xin Tan Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu Li-Kun Xie Yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Yue Zhang Zhi-Yong Zhang Mao-Yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and chemistry China Academy of Engineering PhysicsMianyang 621900China department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of Nuclear Technology Xi’an 710024China university of Chinese Academy of Sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the China Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

移动边缘计算不确定性任务持续卸载及资源分配方法

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软件学报 2024年第3期35卷 1466-1484页

作者：许斌赵云凯朱剑鸣刘一川李烜焘孙雁飞季一木南京邮电大学物联网学院江苏南京210003 南京邮电大学计算机学院江苏南京210003

移动边缘计算场景中任务的不确定性增加了任务卸载及资源分配的复杂性和难度.鉴于此,提出一种移动边缘计算不确定性任务持续卸载及资源分配方法.首先,构建一种移动边缘计算不确定性任务持续卸载模型,通过基于持续时间片划分的任务多批... 详细信息

移动边缘计算场景中任务的不确定性增加了任务卸载及资源分配的复杂性和难度.鉴于此,提出一种移动边缘计算不确定性任务持续卸载及资源分配方法.首先,构建一种移动边缘计算不确定性任务持续卸载模型,通过基于持续时间片划分的任务多批次处理技术应对任务的不确定性,并设计多设备计算资源协同机制提升对计算密集型任务的承载能力.其次,提出一种基于负载均衡的自适应策略选择算法,避免计算资源过度分配导致信道拥堵进而产生额外能耗.最后,基于泊松分布实现了对不确定任务场景模型的仿真,大量实验结果表明时间片长度减小能够降低系统总能耗.此外,所提算法能够更有效地实现任务卸载及资源分配,相较于对比算法,最大可降低能耗11.8%.

关键词：移动边缘计算不确定性任务任务卸载负载均衡自适应

Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： Qiang Li Li‑Jiao Wang Xiang‑Biao Qiu Jing‑Wen Li Wei Xu Tao Li Ze‑Bin Lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun Jing‑Yu Tang Rong Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Zhen Chen Zeng‑Qi Cui An‑chuan Fan Chang‑Qing Feng Fan‑Zhen Feng Ke‑Qing Gao Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu he Yong‑Cheng he Yang Hong yi‑Wei Hu Han‑Xiong Huang Wei‑Hua Jia Hao‑Yu Jiang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Chao Li Gong Li Jia‑Wen Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Guang‑Yuan Luan Bin‑Bin Qi Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Zhi‑Xin Tan Sheng‑Da Tang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Li‑Kun Xie yi‑Wei Yang Han yi Yong‑Ji Yu Guo‑Hui Zhang Lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang Xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Mao‑Yuan Zhao Lu‑Ping Zhou Zhi‑Hao Zhou Ke‑Jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China university of Chinese Academy of Sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

308 nm准分子激光联合胡椒碱通过MC1R/cAMP信号通路促白癜风黑色素合成机制

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中国老年学杂志 2024年第11期44卷 2652-2659页

作者：吴一菲张文合王晓川王支琼张家瑜周红英云南省第一人民医院云南昆明650032 云南中医药大学

目的研究308 nm准分子激光(EL)联合胡椒碱对表皮黑素细胞(MC)、毛囊外根鞘无色素黑素细胞(AMMC)、A375黑素瘤细胞、B16黑素瘤细胞黑素皮质素1受体(MC1R)/环磷酸腺苷(cAMP)信号通路中促白癜风黑素合成相关基因MC1R、蛋白激酶(PK)A、cAMP... 详细信息

目的研究308 nm准分子激光(EL)联合胡椒碱对表皮黑素细胞(MC)、毛囊外根鞘无色素黑素细胞(AMMC)、A375黑素瘤细胞、B16黑素瘤细胞黑素皮质素1受体(MC1R)/环磷酸腺苷(cAMP)信号通路中促白癜风黑素合成相关基因MC1R、蛋白激酶(PK)A、cAMP反应原件结合蛋白(CREB)、小眼畸形相关转录因子(MITF)表达调控的影响。方法将细胞分为5组。联合干预组:308 nm EL照射能量300 mJ/cm^(2),联合1.0 mmol/L胡椒碱;胡椒碱组:1.0 mmol/L;308 nm激光组:仅以能量300 mJ/cm^(2)照射;阳性对照组:EL(能量参数同前)联合8-Mop(0.1 mmol/L);空白对照组:加入相应等量溶媒,不照射。培养MC、AMMC、A375黑素瘤细胞、B16黑素瘤细胞,各组分别作用后,检测MC、AMMC、B16黑素瘤细胞黑素含量和MC、AMMC细胞酪氨酸酶相关蛋白(TRP)-1,TRP-2表达。并通过实时荧光定量聚合酶链反应(qRT-PCR)和Western印迹检测联合干预法作用MC、AMMC、A375黑素瘤细胞72 h后黑色素合成相关信号通路MC1R/cAMP中MC1R、PKA、CREB、MITF mRNA及蛋白表达。结果与空白对照组比较,不同观察组均能不同程度促进黑素细胞的黑色素含量;除胡椒碱组外,不同观察组对TRP-2均有明显促进作用(P1R、PKA、CREB、MITF mRNA和蛋白表达均有不同程度的促进作用,其中以联合干预组作用最强,其结果存在显著差异(P1、TRP-2表达,并能促进黑色素合成相关信号通路MC1R/cAMP中MC1R、PKA、CREB、MITF关键因子的表达,从而促进白癜风黑色素合成。

关键词： 308 nm激光白癜风胡椒碱黑素合成信号通路

糖多孢红霉菌同源片段长度与染色体重组率关系的研究

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生物工程学报 2003年第1期19卷 13-18页

作者：张部昌赵志虎王以光于秀琴刘传暄马清钧军事医学科学院生物工程研究所中国医学科学院医药生物技术研究所北京100050

为了探索同源片段长度与糖多孢红霉菌染色体同源重组率的关系 ,化学合成或用重叠PCR合成带有突变位点、在突变位点两侧长度为 (2 6bp +2 7bp)、(5 0 0bp +5 76bp)和 (190 8bp +174 9bp)的同源序列 ,克隆于糖多孢红霉菌同源重组载体pWHM3... 详细信息

为了探索同源片段长度与糖多孢红霉菌染色体同源重组率的关系 ,化学合成或用重叠PCR合成带有突变位点、在突变位点两侧长度为 (2 6bp +2 7bp)、(5 0 0bp +5 76bp)和 (190 8bp +174 9bp)的同源序列 ,克隆于糖多孢红霉菌同源重组载体pWHM3后 ,分别构建了pWHM1113、pWHM1116和pWHM1119质粒。以PEG介导转化糖多孢红霉菌A2 2 6原生质体 ,3个质粒分别获得每皿 30个、6 9个和 170个转化子 ,但pWHM1113质粒不能与染色体有效整合 ,pWHM1116质粒与染色体整合率为转化子的 2 % ,而pWHM1119质粒与染色体整合率达到转化子的 19%。pWHM1116和pWHM1119质粒均可进行有效的染色体二次重组 ,将突变位位点引入染色体。因此 ,同源片段长度为(5 0 0bp +5 76bp)或更长时 ,可与糖多孢红霉菌染色体进行有效的单重组和双重组。

关键词：糖多孢红霉菌同源片段长度染色体重组率关系