检索结果-南通市图书馆

基于多目标粒子群优化算法的舰船天线布局优化

在线全文

学校读者我要写书评

暂无评论

仪表技术 2021年第3期 59-61,70页

作者：赖毅辉陈锐宁星东华理工大学机械与电子工程学院江西南昌330013 东华理工大学信息工程学院江西南昌330013

为了减小多天线间耦合、辐射方向图畸变(RPD)、近场辐射等对舰船通信的影响,对舰船天线的最优布局进行了研究。提出了一种舰船天线布局优化的混合方法,建立了基于人工神经网络(ANN)的近似模型,用于估计安装在舰船上多天线间的耦合和辐... 详细信息

为了减小多天线间耦合、辐射方向图畸变(RPD)、近场辐射等对舰船通信的影响,对舰船天线的最优布局进行了研究。提出了一种舰船天线布局优化的混合方法,建立了基于人工神经网络(ANN)的近似模型,用于估计安装在舰船上多天线间的耦合和辐射模式,采用人工神经网络与多目标粒子群优化(MOPSO)算法相结合的方法来减少优化时间,提高天线布局设计效率及精度,为船舶天线布局的预设计提供依据。

关键词：天线布局近似模型多目标优化 Pareto前沿

在线全文

学校读者我要写书评

暂无评论

一种复杂背景下的铁路货运车辆车号定位方法

现代电子技术 2024年第9期47卷 82-85页

作者：蔡康程赖毅辉周书民蓝贤桂东华理工大学信息工程学院江西南昌330013 南昌师范学院江西南昌330032

针对复杂背景下铁路货运车辆车号定位复杂、定位准确率低的问题,提出一种采用ResNet50作为基本特征提取网络,同时引入空残差块对学习样本进行多层特征融合,构造了一种新的特征提取网络和改进算法,提高目标检测网络的特征表达能力,实现... 详细信息

针对复杂背景下铁路货运车辆车号定位复杂、定位准确率低的问题,提出一种采用ResNet50作为基本特征提取网络,同时引入空残差块对学习样本进行多层特征融合,构造了一种新的特征提取网络和改进算法,提高目标检测网络的特征表达能力,实现了快速车号目标检测。实验数据集采用自建数据集,并通过三个对比实验验证了该方法的可靠性。当IoU阈值为0.5时,改进算法的平均精度值为97.1%,分别比F⁃VGG和F⁃ResNet50高9.4%和6.8%,同时采用改进算法对我国铁路常用不同车型货运车辆进行车号定位测试实验,从实验结果可以看出优化方法没有误分类或漏检。改进后的算法可以提高复杂背景下铁路货运车辆车号的定位精度,具有较强的泛化能力,对实现复杂背景下车辆车号快速定位具有一定的参考意义。

关键词：车号定位特征提取网络 RCNN ResNet50 空残差块多层特征融合

维普期刊数据库博看期刊

老十针治疗结直肠癌术后胃肠功能障碍的临床研究

在线全文

学校读者我要写书评

暂无评论

中国中医药现代远程教育 2022年第15期20卷 105-107页

作者：王贤柱王梓阳赖奕辉广东省中西医结合医院普外科广东佛山528000

目的观察“老十针”治疗结直肠癌术后胃肠功能障碍的临床效果。方法将2019年12月—2020年12月于广东省中西医结合医院择期行腹腔镜结直肠癌根治术且术后出现胃肠功能障碍的患者60例,随机分为试验组(30例)和对照组(30例),对照组给予常规... 详细信息

目的观察“老十针”治疗结直肠癌术后胃肠功能障碍的临床效果。方法将2019年12月—2020年12月于广东省中西医结合医院择期行腹腔镜结直肠癌根治术且术后出现胃肠功能障碍的患者60例,随机分为试验组(30例)和对照组(30例),对照组给予常规治疗,试验组在此基础上联合“老十针”针刺治疗,比较2组患者术后肠鸣音恢复时间、首次排气时间、首次排便时间及平均住院时间,并记录不良事件的发生率。结果试验组患者肠鸣音恢复时间、首次排气时间、首次排便时间均早于对照组(P<0.05),平均住院时间短于对照组(P<0.05),且未见明显不良事件。结论“老十针”治疗可改善结直肠癌患者术后胃肠功能障碍,并缩短治疗周期。

关键词：老十针结直肠癌术后胃肠功能障碍针刺疗法

体重指数与急性胰腺炎患者严重程度及预后相关性的Meta分析

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国医药科学 2021年第10期11卷 31-35页

作者：王贤柱王梓阳赖奕辉郭冠军广东省中西医结合医院普外科广东佛山528200

目的评价体重指数(BMI)与急性胰腺炎患者严重程度及预后相关性。方法通过计算机检索Pubmed、Embase、Cochrane-Library数据库中关于BMI与急性胰腺炎严重程度及预后胡相关性研究,根据标准筛选文献,进行质量评估和数据提取,采用Revman5.3... 详细信息

目的评价体重指数(BMI)与急性胰腺炎患者严重程度及预后相关性。方法通过计算机检索Pubmed、Embase、Cochrane-Library数据库中关于BMI与急性胰腺炎严重程度及预后胡相关性研究,根据标准筛选文献,进行质量评估和数据提取,采用Revman5.3软件进行Meta分析。结果共纳入19项研究,Meta分析结果显示,肥胖患者患重症胰腺炎风险及死亡率更高(OR=2.76,95%CI=1.39~5.48;OR=1.55,95%CI=1.16~2.06),全身、局部并发症发生率也高于非肥胖患者(OR=1.70,95%CI=1.08~2.67;OR=2.22,95%CI=1.69~2.93);与非超重患者相比,超重患者拥有更高的重症胰腺炎发生率、死亡率及并发症发生率(OR=2.81,95%CI=1.69~4.66;OR=2.93,95%CI=1.10~7.80;OR=3.06,95%CI=1.25~7.47;OR=2.59,95%CI=1.81~3.69);与正常体重患者比较,低体重的急性胰腺炎患者拥有更高的死亡率(OR=1.81,95%CI=1.31~2.51)。结论超重及肥胖均影响急性胰腺炎患者的严重程度及预后;同时,低体重的急性胰腺炎患者死亡风险增加。

关键词：体重指数急性胰腺炎预后 Meta分析

An improved evaluation of the neutron background in the PandaX-Ⅱ experiment

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2020年第3期63卷 54-63页

作者： QiuHong Wang Abdusalam Abdukerim Wei Chen Xun Chen YunHua Chen XiangYi Cui YingJie Fan DeQing Fang ChangBo Fu LiSheng Geng Karl Giboni Franco Giuliani LinHui Gu XuYuan Guo Ke Han ChangDa He Di Huang Yan Huang YanLin Huang Zhou Huang Peng Ji XiangDong Ji YongLin Ju yihui lai Kun Liang HuaXuan Liu Jianglai Liu WenBo Ma YuGang Ma YaJun Mao Yue Meng Parinya Namwongsa KaiXiang Ni JinHua Ning XuYang Ning XiangXiang Ren ChangSong Shang Lin Si AnDi Tan AnQing Wang HongWei Wang Meng Wang SiGuang Wang XiuLi Wang Zhou Wang MengMeng Wu ShiYong Wu JingKai Xia MengJiao Xiao PengWei Xie BinBin Yan JiJun Yang Yong Yang ChunXu Yu Jumin Yuan Dan Zhang HongGuang Zhang Tao Zhang Li Zhao QiBin Zheng JiFang Zhou Ning Zhou XiaoPeng Zhou Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China INPAC and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai Laboratory for Particle Physics and CosmologyShanghai 200240China Yalong River Hydropower Development Company Ltd.Chengdu 610051China School of Physics Nankai UniversityTianjin 300071China School of Physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Tsung-Dao Lee Institute Shanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Peking UniversityBeijing 100871China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Center of High Energy Physics Peking UniversityBeijing 100871China University of Chinese Academy of Sciences Beijing 100049China

In dark matter direct detection experiments,neutron is a serious source of background,which can mimic the dark matter-nucleus scattering *** this paper,we present an improved evaluation of the neutron background in the PandaX-II dark matter experiment by a novel *** of fully relying on the Monte Carlo simulation,the overall neutron background is determined from the neutron-induced high energy signals in the *** addition,the probability of producing a dark-matter-like background per neutron is evaluated with a complete Monte Carlo generator,where the correlated emission of neutron(s)andγ(s)in the(α,n)reactions and spontaneous fissions is taken into *** this method,the neutron backgrounds in the Run 9(26-ton-day)and Run 10(28-ton-day)data sets of PandaX-II are estimated to be(0.66±0.24)and(0.47±0.25)events,respectively.

关键词： dark matter direct detection xenon neutron background high energy gamma neutron generator

腹腔镜联合内镜治疗肝胆结石性疾病的应用价值

在线全文

学校读者我要写书评

暂无评论

辽宁医学杂志 2016年第2期30卷 21-23页

作者：孔之华黄义方陈昭明赖奕辉广东省中西医结合医院外一科广东佛山528200

目的探讨腹腔镜联合内镜治疗肝胆结石性疾病的应用价值。方法收集我院2014年1月至2015年10月入院的100例肝胆结石性疾病患者随机分为三组。LACC组患者给予腹腔镜联合胆管镜外科保胆取石术(LACC)治疗,LC组患者给予腹腔镜胆囊切除术(LC)治... 详细信息

目的探讨腹腔镜联合内镜治疗肝胆结石性疾病的应用价值。方法收集我院2014年1月至2015年10月入院的100例肝胆结石性疾病患者随机分为三组。LACC组患者给予腹腔镜联合胆管镜外科保胆取石术(LACC)治疗,LC组患者给予腹腔镜胆囊切除术(LC)治疗,CC组患者给予胆管镜外科保胆取石术(CC)治疗,比较三组患者相关临床指标与并发症情况。结果三组患者总体术中出血量、手术时间、血红蛋白损失量与医疗费用存在显著性差异,具有统计学意义(P<0.01);两两比较后,LC组与CC组术中出血量与血红蛋白损失量组间比较均显著性高于LACC组,手术时间与医疗费用均显著性低于LACC组,具有统计学差异(P<0.01);三组患者总体术后总并发症发生率差异具有统计学意义(P<0.05);两两比较后,LC组与CC组术后总并发症发生率组间比较均明显高于LACC组,具有统计学差异(P<0.05)。结论腹腔镜联合胆管镜外科保胆取石术治疗肝胆结石性疾病效果最为显著,且术中创伤最小,并发症最少,但价格略高,具有借鉴性。

关键词：腹腔镜内镜肝胆结石性疾病应用价值

在线全文

学校读者我要写书评

暂无评论

乡村旅游发展的问题与对策——以梅州市为例

广东轻工职业技术学院学报 2017年第4期16卷 27-30,40页

作者：林黎扬陈先军赖益辉丘灵秦洁净广东省农科院彩田农业科技信息中心广东广州510640 梅州市文化生态旅游研究会广东梅州514021 嘉应学院学报编辑部广东梅州514023 梅州市社会科学界联合会广东梅州514021 顺德区伦教街道公有资产管委会土地储备发展中心广东佛山528300

从乡村旅游的概念出发,围绕乡村旅游发展的内涵,根据乡村旅游发展的系统理论,提出了乡村旅游发展的问题与对策。

关键词：乡村旅游乡村旅游发展乡村旅游系统问题与对策

Effect of Kupffer cells depletion on ABC phenomenon induced by Kupffer cells-targeted liposomes

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Pharmaceutical Sciences 2019年第4期14卷 455-464页

作者： Chaoyang lai Cong Li Mengyang Liu Qiujun Qiu Xiang Luo Xinrong Liu Ling Hu yihui Deng Yanzhi Song Shenyang Pharmaceutical University

Accelerated blood clearance(ABC) phenomenon is common in many PEGylated nanocarriers, whose mechanism has not been completely elucidated yet. In this study, the correlation between Kupffer cells(KCs) and ABC phenomenon has been studied by KCs-targeted liposomes inducing ABC phenomenon and KCs depletion. In other words, the 4-aminophenyl-α-D-mannopyranoside(APM) lipid derivative DSPE-PEG 2000-APM(DPM), and 4-aminophenyl-β-L-fucopyranoside(APF) lipid derivative DSPE-PEG 2000-APF(DPF) were conjugated and modified on alendronate sodium(AD) liposomes to specifically target and deplete KCs. The dualligand modified PEGylated liposomes(MFPL) showed stronger ability to damage KCs in vitro and in vivo, which also could indirectly illustrate that dual-ligand modification could better target KCs. Besides, the hepatic biodistribution and pharmacokinetics could directly prove that MFPL had a stronger targeting ability to KCs. In addition, in depletion rats, plasma concentration and splenic biodistribution of MFPL and PEGylated liposomes(PL) were significantly elevated and hepatic biodistribution was significantly reduced, which demonstrated that KCs played an important role on elimination of nanoparticles. What’s more, ABC phenomenon of the secondary injection of PL was stronger in KCs depletion rats than that in normal rats, which indicated that depletion of KCs prolonged the circulation of PL in the first injection repeatedly stimulating B-cells in the marginal region of the spleen and causing it to secrete more IgM antibodies. This could also illustrate that anti-PEG IgM takes up a major station compared with KCs. Most important of all, KCs-targeted liposomes could induce a stronger ABC phenomenon than PL in normal rats, which declared that based on the same IgM concentration, the more the KCs were stimulated, the stronger ABC phenomenon was induced. However, in depletion rats, this difference of ABC phenomenon between PL and MFPL could no more exist, further demonstrating tha

关键词： Accelerated blood clearance (ABC) phenomenon Kupffer cells Depletion Liposomes Bio-distribution

Searching for neutrino-less nouble neta necay of 136Xe with PandaX-Ⅱ liquid xenon detector

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2019年第11期43卷 1-10页

作者： Kaixiang Ni yihui lai Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Lisheng Geng Karl Giboni Franco Giuliani Linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Yan Huang Yanlin Huang Zhou Huang Peng Ji Xiangdong Ji Yonglin Ju Kun Liang Huaxuan Liu Jianglai Liu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Parinya Namwongsa Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang Lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang Qiuhong Wang Siguang Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Jingkai Xia Mengjiao Xiao Pengwei Xie Binbin Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Dan Zhang Hongguang Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou INPAC and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai Laboratory for Particle Physics and CosmologyShanghai 200240China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Nankai UniversityTianjin 300071China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Tsung-Dao Lee Institute Shanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Peking UniversityBeijing 100871China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Center of High Energy Physics Peking UniversityBeijing 100871China

We report the Neutrino-less Double Beta Decay（NLDBD） search results from PandaX-Ⅱ dual-phase liquid xenon time projection *** total live time used in this analysis is 403.1 days from June 2016 to *** NLDBD-optimized event selection criteria,we obtain a fiducial mass of 219 kg of natural *** accumulated xenon exposure is 242 kg yr,or equivalently 22.2 kg yr of 136Xe *** the region around 136Xe decay Q-value of 2458 keV,the energy resolution of PandaX-Ⅱ is 4.2%.We find no evidence of NLDBD in PandaX-Ⅱand establish a lower limit for decay half-life of 2.1×1023yr at the 90% confidence level,which corresponds to an effective Majorana neutrino mass mββ <（1.4-3.7） *** is the first NLDBD result reported from a dual-phase xenon experiment.

关键词： neutrino-less double beta decay dark matter underground physics liquid xenon detector