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IP2vec: an IP node representation model for IP geolocation

Frontiers of Computer Science 2024年第06期18卷 186506-186506页

作者： ZHANG Fan YIN Meijuan LIU Fenlin LUO Xiangyang zu Shuodi State Key Laboratory of Mathematical Engineering and Advanced Computing Key Laboratory of Cyberspace Situation Awareness of Henan Province

IP geolocation is essential for the territorial analysis of sensitive network entities, location-based services (LBS) and network fraud detection. It has important theoretical significance and application value. Measurement-based IP geolocation is a hot research topic. However, the existing IP geolocation algorithms cannot effectively utilize the distance characteristics of the delay, and the nodes’ connection relation, resulting in high geolocation error. It is challenging to obtain the mapping between delay, nodes’ connection relation, and geographical location. Based on the idea of network representation learning, we propose a representation learning model for IP nodes (IP2vec for short) and apply it to street-level IP geolocation. IP2vec model vectorizes nodes according to the connection relation and delay between nodes so that the IP vectors can reflect the distance and topological proximity between IP nodes. The steps of the street-level IP geolocation algorithm based on IP2vec model are as follows: Firstly, we measure landmarks and target IP to obtain delay and path information to construct the network topology. Secondly, we use the IP2vec model to obtain the IP vectors from the network topology. Thirdly, we train a neural network to fit the mapping relation between vectors and locations of landmarks. Finally, the vector of target IP is fed into the neural network to obtain the geographical location of target IP. The algorithm can accurately infer geographical locations of target IPs based on delay and topological proximity embedded in the IP vectors. The cross-validation experimental results on 10023 target IPs in New York, Beijing, Hong Kong, and Zhengzhou demonstrate that the proposed algorithm can achieve street-level geolocation. Compared with the existing algorithms such as Hop-Hot, IP-geolocater and SLG, the mean geolocation error of the proposed algorithm is reduced by 33%, 39%, and 51%, respectively.

关键词： IP geolocation network measurement node embedding

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Improving RSW nugget diameter prediction method:unleashing the power of multi-fidelity neural networks and transfer learning

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Advances in Manufacturing 2024年第3期12卷 409-427页

作者： Zhong-Jie Yue Qiu-Ren Chen zu-Guo Bao Li Huang Guo-Bi Tan Ze-Hong Hou Mu-Shi Li Shi-Yao Huang Hai-Long Zhao Jing-Yu Kong Jia Wang Qing Liu Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing210009People’s Republic of China School of Advanced Technology Xi’an Jiaotong-Liverpool UniversitySuzhou215123JiangsuPeople’s Republic of China Material Academy JITRISuzhou215100JiangsuPeople’s Republic of China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240People’s Republic of China

This research presents an innovative approach to accurately predict the nugget diameter in resistance spot welding(RSW)by leveraging machine learning and transfer learning ***,low-fidelity(LF)data were obtained through finite element numerical simulation and design of experiments(DOEs)to train the LF machine learning ***,high-fidelity(HF)data were collected from RSW process experiments and used to fine-tune the LF model by transfer learning *** accuracy and generalization performance of the models were thoroughly *** results demonstrated that combining different fidelity datasets and employing transfer learning could significantly improve the prediction accuracy while minimize the costs associated with experimental trials,and provide an effective and valuable method for predicting critical process parameters in RSW.

关键词： Resistance spot welding(RSW) Nugget diameter prediction Multi-fidelity neural networks Transfer learning

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冲击+扰流柱双层壁冷却结构的强化换热性能及流阻特性

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航空动力学报 2024年第8期39卷 13-26页

作者：韦宏祖迎庆安徽工程大学机械工程学院安徽芜湖241000 复旦大学航空航天系上海200433

对于冲击+扰流柱的双层壁冷却结构,为了研究冲击孔的无量纲排间距和无量纲孔间距、扰流柱的无量纲直径以及冲击射流雷诺数对其强化换热性能以及其流阻特性的影响,基于多种几何参数和流动参数对冲击+扰流柱的双层壁冷却结构进行了实验研... 详细信息

对于冲击+扰流柱的双层壁冷却结构,为了研究冲击孔的无量纲排间距和无量纲孔间距、扰流柱的无量纲直径以及冲击射流雷诺数对其强化换热性能以及其流阻特性的影响,基于多种几何参数和流动参数对冲击+扰流柱的双层壁冷却结构进行了实验研究,并根据实验工况开展了相应的数值模拟。结果表明:在带有扰流柱的整个冲击靶板内表面上,面平均努塞尔数随着射流雷诺数的增大而单调增大,且基本上呈现为线性增长的趋势。总体而言,在扰流柱表面的面平均努塞尔数略高于冲击靶板内壁面的面平均努塞尔数。随着扰流柱的无量纲直径的增大,在双层壁冷却结构的整个内表面的面平均努塞尔数呈现为先下降后增大的趋势。此外,在整个内表面的面平均努塞尔数随着冲击孔的无量纲排间距的增大而减小;但是,面平均努塞尔数对无量纲孔间距变化的响应不敏感。对于冲击+扰流柱双层壁冷却结构的流量系数,它随着射流雷诺数以及冲击孔的无量纲排间距和无量纲孔间距的增大而增大,但是随着扰流柱的无量纲直径的增大而减小。

关键词：双层壁冷却结构冲击射流扰流柱强化换热努塞尔数流量系数

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张奠宙数学教育思想概述

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数学教育学报 2024年第3期33卷 89-95页

作者：刘祖希华东师范大学出版社上海200062

张奠宙是中国著名数学教育家,他的数学教育思想值得研究与传承.张奠宙数学教育思想包括以下7个方面:数学的学术形态与教育形态思想;数学文化就是要“文而化之”的思想;数学美与数学欣赏的思想;重视数学应用的思想;数学史融入数学教育的... 详细信息

张奠宙是中国著名数学教育家,他的数学教育思想值得研究与传承.张奠宙数学教育思想包括以下7个方面:数学的学术形态与教育形态思想;数学文化就是要“文而化之”的思想;数学美与数学欣赏的思想;重视数学应用的思想;数学史融入数学教育的思想;数学“双基”“四基”教学模型的思想;数学教育的“中国道路”思想.7个方面构成知行合一、教学相长、辩证统一的有机整体.

关键词：张奠宙数学的教育形态数学文化数学美数学应用数学史双基中国道路

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Theoretical Research on a D-band Traveling Wave Extended Interaction Amplifier

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Chinese Journal of Electronics 2024年

作者： Zhongtao CUI Xuesong YUAN Xiaotao XU Dongrui CHEN Yifan zu Matthew Thomas Cole Qingyun CHEN Yang YAN Terahertz Science and Technology Key Laboratory of Sichuan Province School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of China Department of Electronic and Electrical Engineering University of Bath

A traveling-wave, extended interaction amplifier is herein investigated for use in millimeter-wave and terahertz amplification sources. By placing engineered extended interaction cavities between the traveling wave structures, higher gain is obtained with a shorter high frequency circuit, compared with conventional traveling wave tubes architectures. The bandwidth of the device is significantly increased relative to extended interaction klystrons. A Dband beam wave interaction circuit of 26 mm long has been designed. Particle in cell simulations at 21.5 kV operating voltage, 0.3 A beam current, and 5 mW input power show that the maximum output power reaches 351 W, with a gain of 48.4 dB and 3-dB bandwidth of 1.42 GHz.

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Broadband bidirectional Brillouin–Raman random fiber laser with ultra-narrow linewidth

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Chinese Physics B 2024年第2期33卷 371-376页

作者：杨茜李阳邹辉梅杰徐恩明张祖兴 Advanced Photonic Technology Laboratory College of Electronic and Optical Engineering&College of MicroelectronicsNanjing University of Posts and TelecommunicationsNanjing 210023China

We present a Brillouin–Raman random fiber laser(BRRFL)with full-open linear cavity structure to generate broadband Brillouin frequency comb(BFC)with double Brillouin-frequency-shift *** incorporation of a regeneration portion consisting of an erbium-doped fiber and a single-mode fiber enables the generation of broadband *** dynamics of broadband BFC generation changing with the pump power(EDF and Raman)and Brillouin pump(BP)wavelength are investigated in detail,*** suitable conditions,the bidirectional BRRFL proposed can produce a flatamplitude BFC with 40.7-nm bandwidth ranging from 1531 nm to 1571.7 nm,and built-in 242-order Brillouin Stokes lines(BSLs)with double Brillouin-frequency-shift ***,the linewidth of single BSL is experimentally measured to be about 2.5 *** broadband bidirectional narrow-linewidth BRRFL has great potential applications in optical communication,optical sensing,spectral measurement,and so on.

关键词： random laser fiber laser stimulated Brillouin scattering(SBS) stimulated Raman scattering(SRS)

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Anatomical variation of the posterior septal artery leads to refractory epistaxis

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2024年第3期10卷 241-243页

作者： Dong-Jiao An zu-Fei Li Xiao-Chang Zhao Jin-Feng Liu Department of Anaesthesiology Beijing Chaoyang HospitalCapital Medical UniversityBeijingChina Department of Otorhinolaryngology Head and Neck Surgery Beijing Chaoyang HospitalCapital Medical UniversityBeijingChina

Purpose:To report a rare variant of the posterior septal artery(PSA),which supplies blood to the posterior mucosa of the contralateral nasal *** report:A 31-year-old female patient underwent suture removal 14 days after septoplasty and developed left-sided epistaxis 6 h after suture *** safely and effectively relieve the patient from epistaxis,the cauterization of the left PSA was performed under general ***,24 h after the first surgical hemostasis,the patient experienced epistaxis again in the right nasal *** have reviewed the patient's sinus computed tomography again and found a rare variant of PSA,which is the right-sided PSA passing through a bony canal in the left-sided nasal ***:The variant of PSA well explained the failure of the first hemostatic ***,we again performed a cauterization of the right-sided PSA,after which the patient recovered and no further epistaxis ***:When cauterization of PSA is used to manage posterior epistaxis,it is necessary to pay attention to the possible variation in PSA.

关键词： cauterization nasal endoscopy posterior septal artery refractory epistaxis sphenopalatine artery

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人工智能法律拟制主体地位再探——面向拟制哲学视角下的法律主体制度

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北京理工大学学报（社会科学版） 2024年第4期26卷 152-163页

作者：俎璐吉林大学理论法学研究中心吉林长春130012

在人工智能法律主体地位的研究中,拟制说呈现出超越主客体说的理论优越性。下一阶段的研究需面向拟制哲学视角下的法律主体制度再探人工智能的法律拟制主体地位。人中心秩序格局是作为拟制建构的法律主体制度的原生基因,据“人”类推的... 详细信息

在人工智能法律主体地位的研究中,拟制说呈现出超越主客体说的理论优越性。下一阶段的研究需面向拟制哲学视角下的法律主体制度再探人工智能的法律拟制主体地位。人中心秩序格局是作为拟制建构的法律主体制度的原生基因,据“人”类推的“方法论”和维护人类实践利益的“目的论”构成这一基因的外向表征,成为新兴法律主体制度建构的逻辑起点。人工智能作为法律拟制主体契合据“人”类推的方法论型构,还能满足“效率/秩序”利益正向函值最大化,是面向人中心秩序格局的法律主体制度进行考证后发现仍然可行且唯可践行的合理方案。同时,在实践中,人工智能作为法律拟制主体还需恪守必要的限度,并可依循平等性、开放性和科学立法原则,建构人工智能主体的设立与终止制度、监管人制度、财产制度、责任承担制度和预防救济制度。

关键词：人工智能法律主体法律主体制度法律拟制

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Excess non-COVID-19-related mortality among inflammatory bowel disease decedents during the COVID-19 pandemic

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World Journal of Gastroenterology 2024年第20期30卷 2677-2688页

作者： Sarah Rotondo-Trivette Xin-Yuan He Jamil S Samaan Fan Lv Emily Truong Michaela Juels Anthony Nguyen Xu Gao Jian zu Yee Hui Yeo Fan-Pu Ji Gil Y Melmed Department of Medicine Cedars-Sinai Medical CenterLos AngelesCA 90048United States Department of Infectious Disease The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina Karsh Division of Gastroenterology and Hepatology Department of Medicine Cedars-Sinai Medical CenterLos AngelesCA 90048United States School of Mathematics and Statistics Xi’an Jiaotong UniversityXi’an 710049Shaanxi ProvinceChina David Geffen School of Medicine University of CaliforniaLos AngelesLos AngelesCA 90095United States Division of Gastroenterology The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina National and Local Joint Engineering Research Center of Biodiagnosis and Biotherapy The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina Key Laboratory of Surgical Critical Care and Life Support(Xi’an Jiaotong University) Ministry of EducationXi’an 710004Shaanxi ProvinceChina

BACKGROUND The coronavirus disease 2019(COVID-19)pandemic disrupted healthcare in the United *** To investigate COVID-19-related and non-COVID-19-related death and characteristics associated with excess death among inflammatory bowel disease(IBD)*** We performed a register-based study using data from the National Vital Statistics System,which reports death data from over 99%of the United States population,from January 1,2006 through December 31,***-related deaths among adults 25 years and older were stratified by age,sex,race/ethnicity,place of death,and primary cause of *** and actual age-standardized mortality rates(ASMRs)per 100000 persons were *** 49782 IBD-related deaths occurred during the study ***-COVID-19-related deaths increased by 13.14%in 2020 and 18.12%in 2021[2020 ASMR:1.55 actual vs 1.37 predicted,95%confidence interval(CI):1.26-1.49;2021 ASMR:1.63 actual vs 1.38 predicted,95%CI:1.26-1.49].In 2020,non-COVID-19-related mortality increased by 17.65%in ulcerative colitis(UC)patients between the ages of 25 and 65 and 36.36%in non-Hispanic black(NHB)Crohn’s disease(CD)*** the pandemic,deaths at home or on arrival and at medical facilities as well as deaths due to neoplasms also *** IBD patients suffered excess non-COVID-19-related death during the *** death was associated with younger age among UC patients,and with NHB race among CD *** death at home or on arrival and due to neoplasms suggests that delayed presentation and difficulty accessing healthcare may have led to increased IBD mortality.

关键词： Inflammatory bowel disease Ulcerative colitis Crohn’s disease COVID-19 Excess death Race Sex Disparities

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“双碳”背景下煤炭生产企业碳减排路径研究

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矿业科学学报 2024年第3期9卷 464-474页

作者：祖秉辉李长松辽宁工程技术大学工商管理学院辽宁葫芦岛125105

当前“双碳”大环境下,煤炭生产企业急需改变行业碳排放量较高的现状。从煤炭产品特点、开采流程、涉排类型等视角,分析了煤炭生产企业的碳减排潜力。在煤炭生产装备方面,提出了应用先进清洁技术、升级改造生产设备、实施能效管理策略... 详细信息

当前“双碳”大环境下,煤炭生产企业急需改变行业碳排放量较高的现状。从煤炭产品特点、开采流程、涉排类型等视角,分析了煤炭生产企业的碳减排潜力。在煤炭生产装备方面,提出了应用先进清洁技术、升级改造生产设备、实施能效管理策略等技术发展路径;在煤炭生产技术方面,从煤炭的勘探、采掘、洗选、监测四方面给出了具体的技术升级路线;在物流与人员管理方面,针对碳排放高的原因,提出更新新能源车辆、应用智慧平台进行物流管理,对于矿区人员生活办公则提出更新用能设备的降碳路径;在企业碳排放捕集封存技术方面,则从煤炭采掘、洗选过程碳捕集技术、煤与瓦斯共采碳捕集技术、碳封存方式四方面提出企业技术发展建议。全面构建煤炭生产企业的碳减排技术路径,帮助行业尽早达峰,尽快中和。

关键词：双碳战略排放源减排路径技术优化

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