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Application type identification of Internet flows based on medium mathematics

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The Journal of China Universities of Posts and Telecommunications 2010年第6期17卷 72-79,88页

作者： cheng wei-qing GONG Jian DING wei SUN Zhi-xin Computer College Nanjing University of Posts and Telecommunications Nanjing 210003 China School of Computer Science and Technology Southeast University Nanjing 210096 China State Key Laboratory of Software Development Environment Beijing 100191 China

Internet application identification is needed by network management in many aspects,such as quality of service （QoS） management,intrusion detection,traffic engineering,accounting,and so on. This article makes an in-depth study of precise identification of Internet applications by using flow characteristics instead of well-known port or application signature match. A novel approach that identifies the application type of an Internet protocol （IP） flow by finding what flow the flow looks the most like based on medium mathematics system （MMS） is proposed. The approach differs from previous ones mainly in two aspects：it has inherent scalability due to its use of the measure of n-dimensional medium truth degree; not only features of a flow,but also the association between the flow and the other flows of the same host as well as the relation among all flows of a host are employed to recognize a flow＇s application type. For the present,some popular applications are concentrated on,and up to six application types can be identified with better accuracy. The results of experiments conducted on Internet show that the proposed methodology is effective and deserves attention.

关键词： application type identification flow characteristics measure of medium truth degree MMS

Prospects on mangrove knowledge services in the smart era:From plant atlas to knowledge graphs

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Science China Earth Sciences 2025年第1期68卷 111-127页

作者： Zhi-wei HOU Wenlong JING cheng-Zhi QIN Ji YANG qing XIA Xiaoling YIN Key Laboratory of Guangdong for Utilization of Remote Sensing and Geographical Information System Guangdong Open Laboratory of Geospatial Information Technology and ApplicationGuangzhou Institute of GeographyGuangdong Academy of SciencesGuangzhou510070China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou511458China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China School of Traffic&Transportation Engineering Changsha University of Science and TechnologyChangsha410114China

Mangroves are crucial to the ecological security of the Earth and human *** management,conservation,and restoration are of great importance and necessitate the support of spatio-temporal information and multidisciplinary knowledge such as biology and *** knowledge services such as plant atlas provide illustrated textual knowledge of ***,this kind of service is oriented to information retrieval and is incapable of effectively mining and utilizing fragmented knowledge from multi-source heterogeneous data,facing the problem of“massive data,rare knowledge”.Knowledge graphs are capable of extracting,organizing,and fusing the knowledge contained in massive data into semantic networks that can be understood and computed by *** provide a solution for the realization of intelligent knowledge *** on the urgent need for mangrove knowledge acquisition,formal representation,and intelligent services,this paper proposes a research prospect on mangrove knowledge graphs and knowledge *** first analyze the similarities and differences between various domain-specific concepts of *** this basis,we define the mangrove knowledge graph as a large-scale knowledge base that integrates multi-disciplinary knowledge and spatio-temporal information with mangrove ecosystems as the ***,we propose a research framework for mangrove knowledge services that can realize the transformation from multi-modal data to intelligent knowledge services,including multiple research levels such as ubiquitous data sensing and aggregation,knowledge organization and graph construction,and intelligent mangrove knowledge ***,the methods and workflow for constructing mangrove knowledge graphs are ***,we discuss the challenges and possible future directions of mangrove knowledge services in the smart era,including the construction of a mangrove knowledge system that integrates the domain-specific charac

关键词： Mangrove Tupu Knowledge graph Multi-modal Knowledge service

Visual electrophysiological assessment of children with poor response to treatment for functional amblyopia

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International Journal of Ophthalmology(English edition) 2025年第2期18卷 315-322页

作者： Dong-qing Yuan wei-wei Zhang Liu-wei Gu qing-Huai Liu Department of Ophthalmology Jiangsu Province Hospitalthe First Affiliated Hospital of Nanjing Medical UniversityJiangsu Women and Children Health HospitalNanjing 210029Jiangsu ProvinceChina

AIM:To assess the visual electrophysiological outcomes in children with functional amblyopia who exhibited poor response to conventional ***:Twenty-one children with functional amblyopia,aged 5.7±2.1y(range:4-10y),underwent comprehensive ophthalmic and refractive *** domain-optical coherence tomography(SD-OCT)and multifocal electroretinography(mfERG)were conducted to analyze the macular retinal thickness and the first-order response P1 ring of the mfERG in the amblyopic eye(AE)compared to the fellow good eye(GE).RESULTS:Initially,visual acuity in the AE ranged from 20/800 to 20/40,while the GE exhibited a range of 20/25 to 20/20(P<0.01).After 6mo of treatment,17 patients demonstrated improved visual acuity in the AE to 20/50 or better,while 4 children showed no ***-OCT revealed comparable macular and optic disc structures between the AE and *** to treatment,the mfERG P1 ring amplitude was significantly reduced in the AE compared to GE(P<0.05).The AE/GE ratio of P1 ring amplitude showed significant improvement ***,a smaller AE/GE ratio before treatment was associated with poorer improvement ***:In the management of functional amblyopia,a thorough assessment of amblyopic eye examinations is *** 20%of amblyopic eyes may not achieve significant improvement in visual acuity,despite the absence of detectable organic retinal *** may reveal underlying *** mfERG into initial assessments or treatment follow-ups can aid in identifying potential hidden retinal defects and predicting the prognosis of the amblyopic eye.

关键词： functional amblyopia poor response optical coherence tomography multifocal electroretinography retinal defects

Mode-switching cooperative defense strategy for the orbit pursuit-evasion-defense game

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Defence Technology(防务技术) 2025年第2期44卷 272-286页

作者： Yongshang wei Tianxi Liu cheng wei School of Aerospace Harbin Institute of TechnologyHarbin150000China

This paper presents a mode-switching collaborative defense strategy for spacecraft pursuit-evasiondefense *** these scenarios,the pursuer tries to avoid the defender while capturing the evader,while the evader and defender form an alliance to prevent the pursuer from achieving its ***,the behavioral modes of the pursuer,including attack and avoidance modes,were established using differential game *** modes are then recognized by an interactive multiple model-matching algorithm(IMM),that uses several smooth variable structure filters to match the modes of the pursuer and update their probabilities in real *** on the linear-quadratic optimization theory,combined with the results of strategy identification,a two-way cooperative optimal strategy for the defender and evader is proposed,where the evader aids the defender to intercept the pursuer by performing luring *** results show that the interactive multi-model algorithm based on several smooth variable structure filters perform well in the strategy identification of the pursuer,and the cooperative defense strategy based on strategy identification has good interception performance when facing pursuers,who are able to flexibly adjust their game objectives.

关键词： Cooperative policy Differential games Orbit pursuit-evasion-defense game Mod recognition

基于流特性和真值程度的VoIP语音质量单端客观评价

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通信学报 2008年第4期29卷 30-39页

作者：成卫青龚俭丁伟东南大学计算机科学与工程学院

提出了一种仅利用IP流特性预测VoIP感知服务质量(PQoS)的非侵入单端客观评价方法——FSPAV,其关键是定义了3个与用户感知相关的流特性测度。不需要同步时钟或解析应用协议,仅需要监测用户主机接收到的包含对端用户语音数据的IP分组计算... 详细信息

提出了一种仅利用IP流特性预测VoIP感知服务质量(PQoS)的非侵入单端客观评价方法——FSPAV,其关键是定义了3个与用户感知相关的流特性测度。不需要同步时钟或解析应用协议,仅需要监测用户主机接收到的包含对端用户语音数据的IP分组计算测度。使用个体真值程度度量,将通话片段的3个测度测量值映射成一个通话质量客观评价值,计算过程中还能得出每个特性的优劣程度。在互联网上利用VoIP软件QQ和Skype进行多次语音通话实验,实验结果显示主、客观评价值之间具有相当高的相关性,表明了本方法的有效性。

关键词： VoIP 语音质量客观评价流特性真值程度度量

CdS纳米粒子的微波法制备及其光谱特性研究

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光谱学与光谱分析 2008年第6期28卷 1348-1352页

作者：程伟青刘迪严拯宇中国药科大学分析化学教研室

用微波法以硫代乙酰胺为硫源,成功合成了CdS纳米粒子。透射电子显微镜（TEM）对合成的CdS纳米粒子的表征结果为粒径约12 nm,粒径分布较为均匀,分散性较好。研究了微波功率、pH值、反应时间等因素对其吸收光谱,荧光光谱和粒径的影响。结... 详细信息

用微波法以硫代乙酰胺为硫源,成功合成了CdS纳米粒子。透射电子显微镜（TEM）对合成的CdS纳米粒子的表征结果为粒径约12 nm,粒径分布较为均匀,分散性较好。研究了微波功率、pH值、反应时间等因素对其吸收光谱,荧光光谱和粒径的影响。结果表明,在微波功率为30%、初始反应pH 9.0、微波反应时间为25 min时,可合成质量较高的CdS纳米粒子。比较了以硫代乙酰胺、硫脲和硫化钠为硫源合成的CdS纳米粒子,结果表明,以硫代乙酰胺为硫源合成的CdS纳米粒子荧光带边发射强,缺陷发射弱,荧光性质较好;而以硫脲为硫源合成的CdS纳米粒子荧光边带发射弱;以硫化钠为硫源合成的CdS纳米粒子荧光以缺陷发射为主。铜离子在6.4-512μg·L^-1范围内对该纳米粒子荧光的猝灭呈现良好线性,可用于痕量铜离子的测定。

关键词：微波法 CdS纳米粒子荧光光谱尺寸量子化效应

Ideal Bi‑Based Hybrid Anode Material for Ultrafast Charging of Sodium‑Ion Batteries at Extremely Low Temperatures

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Nano-Micro Letters 2025年第3期17卷 152-167页

作者： Jie Bai Jian Hui Jia Yu Wang Chun cheng Yang qing Jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of EducationSchool of Materials Science and EngineeringJilin UniversityChangchun 130022People’s Republic of China

Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at−20°C or ***,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely ***,a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock *** a hybrid shows an unprecedented rate performance(237.9 mAh g^(−1) at 2 A g^(−1))at−60℃,outperforming all reported SIB anode *** with a Na_(3)V_(2)(PO_(4))_(3)cathode,the energy density of the full cell can reach to 181.9 Wh kg^(−1) at−40°*** on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries

Preparation of FeCoNi medium entropy alloy from Fe^(3+)-Co^(2+)-Ni^(2+)solution system

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 92-101页

作者： Zongyou cheng qing Zhao Mengjie Tao Jijun Du Xingxi Huang chengjun Liu Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education) Shenyang 110819China

In recent years,medium entropy alloys have become a research hotspot due to their excellent physical and chemical *** controlling reasonable elemental composition and processing parameters,the medium entropy alloys can exhibit similar properties to high entropy alloys and have lower *** this paper,a FeCoNi medium entropy alloy precursor was prepared via sol-gel and coprecipitation methods,respectively,and FeCoNi medium entropy alloys were prepared by carbothermal and hydrogen *** phases and magnetic properties of FeCoNi medium entropy alloy were *** showed that FeCoNi medium entropy alloy was produced by carbothermal and hydrogen reduction at 1500℃.Some carbon was detected in the FeCoNi medium entropy alloy prepared by carbothermal *** alloy prepared by hydrogen reduction was uniform and showed a relatively high ***,the hydrogen reduction product exhibited better saturation magnetization and lower coercivity.

关键词： medium entropy alloy sol-gel co-precipitation carbothermal hydrogen reduction

Three-dimensional fracture of UO_(2)ceramic pellets by phase field modeling

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 165-176页

作者： wei Xiong Xuan Ye Hongzhang cheng Xiaoming Liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

Fracture is the primary failure type for the UO_(2)ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional(3D)UO_(2)ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture