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Spatial Layout Analysis of Monumental Landscape of Zhongshan Park in Beijing

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Journal of Landscape Research 2022年第6期14卷 25-28,32页

作者： xie yuxuan XU Zhendong CHEN Zhongyi College of Horticulture and Gardening Yangtze UniversityJingzhouHubei 434025China Jingzhou Park Administrative Office JingzhouHubei 434000China

The creation of monumental landscapes in urban parks is a materialized expression of human spiritual emotions, carrying the functions of triggering people's thinking, arousing inner emotions and spreading spiritual connotations such as regional culture. Scientific spatial layout and functional analysis of commemorative landscape is conducive to giving full play to the effect of commemorative *** field investigation and literature reading, the spatial layout, landscape elements and locality of the monumental theme landscape in Zhongshan Park in Beijing were comprehensively analyzed, showing that there is a close correspondence between spatial change and commemorative emotional ups and downs.

关键词： Monumental landscapes Landscape space layout Zhongshan Park Beijing

基于CiteSpace国内疾病谱研究的可视化分析

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中国医药科学 2024年第7期14卷 167-171,194页

作者：林国栋熊坚谢芳雪蒋晶赵惠芳马瑷瞳农玉萱梁韬广西中医药大学针灸推拿学院广西南宁530001 成都中医药大学针灸推拿学院四川成都610072 广西中医药大学公共卫生与管理学院广西南宁530001 成都中医药大学养生康复学院四川成都610072

目的运用文献计量和可视化软件对我国疾病谱研究文献进行分析,探讨研究现状、前沿热点及研究趋势,为日后疾病谱的深入研究提供参考。方法本研究应用CiteSpace对中国知网检索筛选的2211篇与疾病谱研究相关文献的作者、机构和关键词进行分... 详细信息

目的运用文献计量和可视化软件对我国疾病谱研究文献进行分析,探讨研究现状、前沿热点及研究趋势,为日后疾病谱的深入研究提供参考。方法本研究应用CiteSpace对中国知网检索筛选的2211篇与疾病谱研究相关文献的作者、机构和关键词进行分析,绘制作者、机构和关键词可视化图谱,对关键词进行聚类、共现和时间叠加分析。结果我国疾病谱研究始于1983年,整体呈稳步发展态势。本领域内核心研究机构有天津中医药大学和空军总医院,本领域内代表学者有徐先荣、张步振和熊俊。关键词聚类归纳分析发现研究热点为基于疾病谱数据统计研究各科疾病特征及变化趋势、针对特殊人群进行监测并探寻其易感疾病的发生原因及防治措施、疾病谱分析数据助力医疗服务质量提高及医疗模式转变、围绕疾病谱分析提高医院职能。结论疾病谱的研究前景广,现下主要集中在四个研究领域。研究分析发现开展跨地区研究交流,扩大研究人群、病种及地域范围,探究各类辅助诊断技术运用价值是本领域研究日后需解决的问题。

关键词：疾病谱 CiteSpace 可视化分析知识图谱

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Chinese Spirits Identification Model Based on Mid-Infrared Spectrum

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Computers, Materials & Continua 2020年第9期64卷 1869-1883页

作者： Wu Zeng Zhanxiong Huo yuxuan xie Yingxiang Jiang Kun Hu School of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhan430000China Gina Cody School of Engineering and Computer Science Concordia UniversityMontrealH3G 1M8Canada

Applying computer technology to the field of food safety,and how to identify liquor quickly and accurately,is of vital importance and has become a research *** this paper,sparse principal component analysis(SPCA)was applied to seek sparse factors of the mid-infrared(MIR)spectra of five famous vintage year Chinese *** results showed while meeting the maximum explained variance,23 sparse principal components(PCs)were selected as features in a support vector machine(SVM)model,which obtained a 97%classification *** comparison principal component analysis(PCA)selected 10 PCs as features but only achieved an 83%classification *** both approaches were better than a direct SVM approach based on the classification results(64%classification accuracy),they also demonstrated the importance of extracting sparse PCs,which captured most important *** combination of computer technology SPCA and MIR provides a new and convenient method for liquor identification in food safety.

关键词： Mid-infrared spectra Chinese spirits SPCA SVM liquor identification

GOPS:A general optimal control problem solver for autonomous driving and industrial control applications

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Communications in Transportation Research 2023年第1期3卷 92-106页

作者： Wenxuan Wang Yuhang Zhang Jiaxin Gao yuxuan Jiang Yujie Yang Zhilong Zheng Wenjun Zou Jie Li Congsheng Zhang Wenhan Cao Genjin xie Jingliang Duan Shengbo Eben Li School of Vehicle and Mobility Tsinghua UniversityBeijing100084China

Solving optimal control problems serves as the basic demand of industrial control *** methods like model predictive control often suffer from heavy online computational *** learning has shown promise in computer and board games but has yet to be widely adopted in industrial applications due to a lack of accessible,high-accuracy *** Reinforcement learning(RL)solvers are often developed for academic research and require a significant amount of theoretical knowledge and programming ***,many of them only support Python-based environments and limit to model-free *** address this gap,this paper develops General Optimal control Problems Solver(GOPS),an easy-to-use RL solver package that aims to build real-time and high-performance controllers in industrial *** is built with a highly modular structure that retains a flexible framework for secondary *** the diversity of industrial control tasks,GOPS also includes a conversion tool that allows for the use of Matlab/Simulink to support environment construction,controller design,and performance *** handle large-scale problems,GOPS can automatically create various serial and parallel trainers by flexibly combining embedded buffers and *** offers a variety of common approximate functions for policy and value functions,including polynomial,multilayer perceptron,convolutional neural network,***,constrained and robust algorithms for special industrial control systems with state constraints and model uncertainties are also integrated into *** examples,including linear quadratic control,inverted double pendulum,vehicle tracking,humanoid robot,obstacle avoidance,and active suspension control,are tested to verify the performances of GOPS.

关键词： Industrial control Reinforcement learning Approximate dynamic programming Optimal control Neural network Benchmark

基于CCA-ELM模型的国产LNG出厂价格中短期预测研究——以陕西省为例

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国际石油经济 2024年第7期32卷 99-106页

作者：潘凯谢翔张曦刘定智张晗张元涛邓钰暄贺美李慧慧孙仁金中国石油规划总院经济管理学院

考虑供需基本面因素和非基本面因素,构建CCA-ELM模型用于国产LNG出厂价格的预测。供需基本面因素包括LNG的产量、销量、库存、气温以及原料气成本,非基本面影响因素包括原油、汽油、柴油、煤炭等替代能源价格与东北亚天然气现货价格。... 详细信息

考虑供需基本面因素和非基本面因素,构建CCA-ELM模型用于国产LNG出厂价格的预测。供需基本面因素包括LNG的产量、销量、库存、气温以及原料气成本,非基本面影响因素包括原油、汽油、柴油、煤炭等替代能源价格与东北亚天然气现货价格。通过典型相关性分析,研究各个影响因素对价格的作用程度。以10个影响因素的周度数据为研究对象,以LNG出厂价格的历史序列与其影响因素构建CCA-ELM神经网络预测模型。10个影响因素整体与LNG出厂价格的相关性较强,中国LNG出厂价格受能源市场的影响程度较高,受供需基本面的影响程度较低。兼顾LNG出厂价格历史数据与影响因素的CCA-ELM模型有效改进了时间序列神经网络的预测方法,提高了预测精度。

关键词： LNG出厂价格影响因素 ELM神经网络典型相关分析

腹泻型肠易激综合征中医证型与血清Endocan的相关性研究

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现代中西医结合杂志 2024年第7期33卷 895-899,905页

作者：张洪薇王再见谢春娥雷雪李彤高玉璇邹茂琳王悦卿李会霞北京中医药大学北京100020 北京中医药大学第三附属医院北京100029 北京中医药大学东方医院北京100078 北京市怀柔区中医医院北京101499

目的探讨腹泻型肠易激综合征(IBS-D)患者的中医辨证分型特点及其与血清内皮细胞特异性分子-1(Endocan)水平的相关性。方法选取2022年3月—2023年4月在北京中医药大学第三附属医院脾胃病科门诊就诊的127例IBS-D患者作为IBS-D组,另以同期2... 详细信息

目的探讨腹泻型肠易激综合征(IBS-D)患者的中医辨证分型特点及其与血清内皮细胞特异性分子-1(Endocan)水平的相关性。方法选取2022年3月—2023年4月在北京中医药大学第三附属医院脾胃病科门诊就诊的127例IBS-D患者作为IBS-D组,另以同期27例健康体检者作为健康组,收集受检者的年龄、性别、中医四诊辨证资料及实验室检查、影像学检查结果,统计IBS-D患者中医证型分布情况,比较不同中医证型IBS-D患者的血清Endocan水平,Pearson相关性分析中医证型与血清Endocan水平的相关性。结果127例IBS-D患者中,以大肠湿热证[29.9%(38/127)]、肝郁脾虚证[28.3%(36/127)]多见,其次为寒热错杂、脾虚湿盛证和脾肾阳虚证。IBS-D组血清肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)、Endocan水平均明显高于健康组(P均0.05)。Pearson相关性分析显示,大肠湿热证、肝郁脾虚证与血清Endocan水平均呈正相关(P均<0.05)。结论IBS-D患者机体存在轻度炎症反应,血清Endocan水平可作为IBS-D的中医辨证分型参考指标。

关键词：腹泻型肠易激综合征内皮细胞特异性分子-1 大肠湿热证肝郁脾虚证

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Hierarchical Federated Learning: Architecture, Challenges, and Its Implementation in Vehicular Networks

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ZTE Communications 2023年第1期21卷 38-45页

作者： YAN Jintao CHEN Tan xie Bowen SUN yuxuan ZHOU Sheng NIU Zhisheng Tsinghua University Beijing 100084China Beijing Jiaotong University Beijing 100044China

Federated learning(FL)is a distributed machine learning(ML)framework where several clients cooperatively train an ML model by exchanging the model parameters without directly sharing their local *** FL,the limited number of participants for model aggregation and communication latency are two major *** federated learning(HFL),with a cloud-edge-client hierarchy,can leverage the large coverage of cloud servers and the low transmission latency of edge *** are growing research interests in implementing FL in vehicular networks due to the requirements of timely ML training for intelligent ***,the limited number of participants in vehicular networks and vehicle mobility degrade the performance of FL *** this context,HFL,which stands out for lower latency,wider coverage and more participants,is promising in vehicular *** this paper,we begin with the background and motivation of HFL and the feasibility of implementing HFL in vehicular ***,the architecture of HFL is ***,we clarify new issues in HFL and review several existing ***,we introduce some typical use cases in vehicular networks as well as our initial efforts on implementing HFL in vehicular ***,we conclude with future research directions.

关键词： hierarchical federated learning vehicular network mobility convergence analysis

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基于选择实验法的西双版纳人象冲突治理措施

林业科学 2023年第10期59卷 162-170页

作者：胡宇轩陈俊峰谢屹北京林业大学经济管理学院北京100083 延安大学经济与管理学院延安716099

【目的】厘清影响农户选择人象冲突治理措施的关键因素,为政府开展人象冲突有效治理提供决策参考,促进区域人象和谐共生。【方法】以云南省西双版纳州亚洲象分布区为研究区域,基于选择实验法设计由补偿标准提高、修建栅栏、种植结构调... 详细信息

【目的】厘清影响农户选择人象冲突治理措施的关键因素,为政府开展人象冲突有效治理提供决策参考,促进区域人象和谐共生。【方法】以云南省西双版纳州亚洲象分布区为研究区域,基于选择实验法设计由补偿标准提高、修建栅栏、种植结构调整、转移问题象和移民搬迁5种治理措施组成的选择集,采用混合回归模型对实地调查收集的472位农户数据进行估算,分析农户选择人象冲突治理措施的关键因素。【结果】1)农户倾向的治理措施依次为亚洲象肇事补偿80%(0.99)、转移问题象(0.97)、种植结构调整(0.96)、修建栅栏(0.45);2)收入水平存在差异的农户对补偿标准提高、转移问题象和种植结构调整具有较高选择倾向;3)与补偿标准提高、设置栅栏、种植结构调整、转移问题象和移民搬迁组成的治理措施相比,维持现状(ASC)变量系数显著为正,表明农户倾向于整体上维持现有治理措施;4)相对于治理工作具有正向偏好的农户而言,劳动力数量、不信仰宗教的人数以及感知到人象冲突存在的农户倾向选择改进后的治理措施。【结论】农户对政府制定的治理措施表现出较高选择倾向,但移民搬迁是农户最不愿意选择的治理措施,需要关注农户对人象冲突治理措施的选择偏好以优化治理工作,构建由补偿标准提高、问题象转移、修建栅栏等多种措施组成的新型治理模式,优先为家庭劳动力多和受亚洲象肇事影响严重的农户提供治理工作参与机会。

关键词：亚洲象保护野生动物肇事混合回归模型治理措施选择实验

Soft X-ray in-line holographic experiment

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Chinese Science Bulletin 1998年第8期43卷 641-643页

作者： Shaoguang Yang Xingshu xie Chengzhi Jia Yongfei Zhao Shiping Jiang yuxuan Zhang Xiaobin Shan Xinyi Zhang Univ Sci & Technol China Ctr Fundamental Phys Hefei 230026 Peoples R China Univ Sci & Technol China Natl Synchrotron Radiat Lab Hefei 230029 Peoples R China

Water window" soft X-ray has some advantages in the microimaging of biological specimens. Soft X-ray holography can give us three-dimensional images of biological cells in their natural condition. Quasi-monochromatic soft X-ray from the polymonochromatic synchrotron radiation is obtained by a zone plate-pinhole linear monochromator at National Synchrotron Radiation Laboratory (NSRL) at Hefei. The pinhole is used to increase the temporal coherence of the soft X-ray, and also to increase the spatial coherence of it. An in-line holographic experiment has been finished with soft X-ray of main wavelength 4.5 nm and pinhole of diameter 0.03 mm. The magnified hologram is reconstructed with He-Ne laser. A smaller pinhole is wanted to be used to improve the coherence of the soft X-ray so as to improve the quality of the hologram.

关键词： soft X-ray microscopy in-line hologram.