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Modelling two-layer nanofluid flow in a micro-channel with electro-osmotic effects by means of Buongiorno’s model

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Applied Mathematics and Mechanics(English Edition) 2020年第1期41卷 83-104页

作者： M.D.k.NIAZI Hang xu State key Lab of Ocean Engineering Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE)School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong University

A fully developed steady immiscible flow of nanofluid in a two-layer microchannel is studied in the presence of electro-kinetic ***’s model is employed for describing the behavior of *** from the previous studies on two-layer channel flow of a nanofluid,the present paper introduces the flux conservation conditions for the nanoparticle volume fraction field,which makes this work new and unique,and it is in coincidence with practical *** governing equations are reduced into a group of ordinary differential equations via appropriate similarity *** highly accurate analytical approximations are *** physical quantities and total entropy generation are analyzed and discussed.A comparison is made to determine the significance of electrical double layer(EDL)effects in the presence of an external electric *** is found that the Brownian diffusion,the thermophoresis diffusion,and the viscosity have significant effects on altering the flow behaviors.

关键词： electrical double layer(EDL) entropy generation micro-channel nanofluid

APwF: A Parallel website Fingerprinting Attack with Attention Mechanism

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Computers, Materials & Continua 2025年第2期82卷 2027-2041页

作者： Dawei xu Min wang Yue Lv Moxuan Fu Yi wu Jian Zhao College of Computer Science and Technology Changchun UniversityChangchun130022China School of Cyberspace Science and Technology Beijing Institute of TechnologyBeijing100081China key Laboratory of Intelligent Rehabilitation and Barrier-Free for the Disabled Changchun UniversityChangchun130022China China Academy of Information and Communications Technology Beijing100083China key Laboratory of Mobile Application Innovation and Governance Technology Ministry of Industry and Information TechnologyBeijing100846China

website fingerprinting (wF) attacks can reveal information about the websites users browse by de-anonymizing encrypted traffic. Traditional website fingerprinting attack models, focusing solely on a single spatial feature, are inefficient regarding training time. when confronted with the concept drift problem, they suffer from a sharp drop in attack accuracy within a short period due to their reliance on extensive, outdated training data. To address the above problems, this paper proposes a parallel website fingerprinting attack (APwF) that incorporates an attention mechanism, which consists of an attack model and a fine-tuning method. Among them, the APwF model innovatively adopts a parallel structure, fusing temporal features related to both the front and back of the fingerprint sequence, along with spatial features captured through channel attention enhancement, to enhance the accuracy of the attack. Meanwhile, the APwF method introduces isomorphic migration learning and adjusts the model by freezing the optimal model weights and fine-tuning the parameters so that only a small number of the target, samples are needed to adapt to web page changes. A series of experiments show that the attack model can achieve 83% accuracy with the help of only 10 samples per category, which is a 30% improvement over the traditional attack model. Compared to comparative modeling, APwF improves accuracy while reducing time costs. After further fine-tuning the freezing model, the method in this paper can maintain the accuracy at 92.4% in the scenario of 56 days between the training data and the target data, which is only 4% less loss compared to the instant attack, significantly improving the robustness and accuracy of the model in coping with conceptual drift.

关键词： website fingerprinting attack transfer learning concept drift

MICROSTRUCTURE ANALYSIS OF AN ION-NITRIDINGLAER ON A NO.45 STEEL

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Acta Metallurgica Sinica(English Letters) 1998年第3期11卷 183-189页

作者： X.L.xu L.wang Z.w.Yu Z.k.Hei Dalian Maritime Univ Dalian China

The cross-sectional microstructure of an ion-nitrided layer on a No.45 steel was studied by transmission electron microscopy (TEM). The results show that the columnar crystals constitute the compound layer. Most of them have the microstructure of alternating ε-Fe2-3N and γ-Fe4N and others are single ε-Fe2-3N phase. There are abnormal strip ferrites between the columnar crystals. The transition layer mainly consists of spherical γ-Fe4N and cementite (Fe3C) particles in the pearlite are dissolved in this layer. In diffusion layer, besides the equilibrium phase γ-Fe4N, there are α -Fe16N2 and the satellite spots around main spots of α-Fe16N2 demonstrate its modulation structure. A metastable ordered cluster zone of the nitropen atoms was found in the division layer.

关键词： ion nitriding microstructure No.45 steel

[Application of ZHUANG Lixing's Daoqi Tongjing needling method from the perspectives of principles, methods, formulas, acupoints and techniques of acupuncture]

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Zhongguo zhen jiu = Chinese acupuncture & moxibustion 2025年第2期45卷 233-6页

作者： Xiaoyan xu Xin Liu Meichen Li Lixing Zhuang First Clinical Medical College Guangzhou University of CM Guangzhou 510410 Guangdong Province China. Second Clinical Medical College Guangzhou University of CM. First Affiliated Hospital of Guangzhou University of CM Guangzhou 510410 Guangdong Province Guangdong Clinical Research Academy of CM Guangzhou 510410.

The paper introduces Professor 's academic thought on (directing to preserve essence) needling technique and the clinical experience. Based on ('), needling technique and Professor 's needling method, and by inheriting the valuable experience from the ancient masters and associating with his own clinical practices, Professor fully displayes the characteristics of principles, methods, formulas, acupoints and techniques of acupuncture in diagnosis and treatment of diseases. He integrates the thought of regulating the mind with needling. This needling method focuses on directing through mind regulation and needle manipulation, in which, the operation steps are refined. Besides, this needling method involves both the reinforcing and reducing techniques. The satisfactory effect of this needling has been obtained in clinical treatment for many disorders such as reversion and disharmony of and .

关键词： Daoqi Tongjing Dongyuan needling Huangdi Neijing ZHUANG Lixing directing qi famous doctor's experience

Influence of coagulation mechanisms and floc formation on filterability

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Journal of Environmental Sciences 2017年第7期29卷 338-345页

作者： Ruyuan Jiao Rolando Fabris Christopher w.k.Chow Mary Drikas John van Leeuwen Dongsheng wang Zhizhen xu State key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of Sciences Australian water Quality Centre South Australian Water Corporation Centre for water Management and Reuse School of Natural and Built EnvironmentsUniversity of South Australia key Laboratory of Occupational Safety and Health Beijing Municipal Institute of Labor Protection

Minimizing particles in water is a key goal for improving drinking water quality and *** media filtration process,as the last step of the solid–liquid separation process,is largely influenced by the characteristics of flocs,which are formed and controlled within the coagulation *** a laboratory-based study,the impacts of the physical characteristics of flocs formed using aluminum sulfate on the filtration treatment of two comparative water samples were investigated using a photometric dispersion analyzer and a filterability *** general,the optimum dosage for maximizing filterability was higher than that for minimizing turbidity under neutral p H *** a monomeric aluminum-based coagulant,the charge neutralization mechanism produced better floc characteristics,including floc growth speed and size,than the sweep flocculation *** addition,the charge neutralization mechanism showed better performance compared to sweep flocculation in terms of DOC removal and floc filterability improvement for both waters,and showed superiority in turbidity removal only when the raw water had high *** the different mechanisms,the ways that floc characteristics impacted on floc filterability also *** low variation in floc size distribution obtained under the charge neutralization mechanism resulted in the flocs being amenable to removal by filtration *** the sweep flocculation mechanism,increasing the floc size improved the settling ability of flocs,resulting in higher filter efficiency.

关键词： Coagulation mechanisms Floc characteristics Filterability Turbidity

AN INTERVAL METHOD FOR STUDYING THE RELATIONSHIP BETwEEN THE AUSTRALIAN DOLLAR EXCHANGE RATE AND THE GOLD PRICE

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Journal of Systems Science & Complexity 2012年第1期25卷 121-132,132+131页

作者： Ai HAN k.k.LAI Shouyang wANG Shanying xu Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Department of Management Sciences City University of Hong KongTat Chee AvenueKowloonHong KongChina

This paper proposes an interval method to explore the relationship between the exchange rate of Australian dollar against US dollar and the gold price, using weekly, monthly and quarterly data. with the interval method, interval sample data are formed to present the volatility of variables. The ILS approach is extended to multi-model estimation and the computational schemes are provided. The empirical evidence suggests that the ILS estimates well characterize how the exchange rate relates to the gold price, both in the long-run and short-run. The comparison between the interval and point methods indicates that the difference between the OLS and the ILS estimates is increasing from weekly data to quarterly data, since the lowest frequency point data lost the most information of volatility.

关键词： Exchange rate gold price interval method.

主动式气膜冷却对高超声速飞行器等离子体鞘套的影响

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中山大学学报（自然科学版）（中英文） 2025年第1期64卷 250-256页

作者：徐春光张源耕中山大学航空航天学院广东深圳518107

以钝锥模型为研究对象,采用热化学非平衡计算方法并结合可压缩N-S方程、SST k-ω湍流模型,对钝锥模型肩部台阶喷流和头部逆向喷流流场进行了数值模拟。在考虑不同喷流压强、喷口位置和数量等因素的基础上,分析了主动式气膜冷却对等离子... 详细信息

以钝锥模型为研究对象,采用热化学非平衡计算方法并结合可压缩N-S方程、SST k-ω湍流模型,对钝锥模型肩部台阶喷流和头部逆向喷流流场进行了数值模拟。在考虑不同喷流压强、喷口位置和数量等因素的基础上,分析了主动式气膜冷却对等离子体鞘套的影响。结果表明:高超声速飞行器采用主动式气膜冷却技术时,喷口的数量、位置及喷流压强对等离子体密度均具有显著的影响。肩部的切向喷流可有效抑制模型壁面附近的等离子体密度,进而可能对高频电磁波的传输和目标雷达散射截面(RCS)产生影响。头部逆向喷流可显著改变等离子体的分布情况,不同的逆向喷流参数配置会导致明显的差异。

关键词：高超声速飞行器等离子体鞘套主动式气膜冷却热化学非平衡双温模型

Dynamical study of T_(ss)systems using the chiral quark model

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Chinese Physics C 2025年第1期49卷 60-69页

作者： Jiazheng Ji Yuheng Xing Xinxing wu Ning xu Yue Tan Department of Physics Yancheng Institute of TechnologyYancheng 224051China

Since the discovery of T_(cc)by LHCb,there has been considerable interest in T_(cc)and its heavy-flavor ***,the study of its strange partner T_(ss)has been largely *** the framework of the chiral quark model,we conducted a systematic study of the bound states of T_(ss)based on the Gaussian Expansion *** considered all physical channels with 01^(+),including molecular and diquark ***,by considering the coupling between diquarks and molecular states,our calculations allowed us to identify a deep bound state with a bounding energy of 60 MeV primarily composed of kk^(*).Using the^(3)P_(0)model,we calculated the decay width of k^(*)within the kk^(*)bound state,which is approximated as the decay width of the bound state in the T_(ss)*** results indicate that,owing to the effect of binding energy,the decay width of k^(*)in kk^(*)is approximately 3 MeV smaller than that of k^(*)in ***,resonance state calculations were *** used the real-scaling method to search for possible resonance states in the T_(ss)*** of the strong attraction in the[k^(*)]_(8)[k^(*)]_(8)configuration,four resonance states were found in the vicinity of 2.2-2.8 GeV,predominantly featuring hidden-color *** decay widths of these states are less than 10 *** strongly recommend experimental efforts to search for the resonance states in the T_(ss)system predicted by our calculations.

关键词： quark model T_(ss) system bound state resonances

Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV

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Science China(Physics,Mechanics & Astronomy) 2025年

作者： Zhen Cao F.Aharonian Axikegu Y.X.Bai Y.w.Bao D.Bastieri X.J.Bi Y.J.Bi w.Bian A.V.Bukevich Q.Cao w.Y.Cao Zhe Cao J.Chang J.F.Chang A.M.Chen E.S.Chen H.X.Chen Liang Chen Lin Chen Long Chen M.J.Chen M.L.Chen Q.H.Chen S.Chen S.H.Chen S.Z.Chen T.L.Chen Y.Chen N.Cheng Y.D.Cheng M.C.Chu M.Y.Cui S.w.Cui X.H.Cui Y.D.Cui B.Z.Dai H.L.Dai Z.G.Dai Danzengluobu X.Q.Dong k.k.Duan J.H.Fan Y.Z.Fan J.Fang J.H.Fang k.Fang C.F.Feng H.Feng L.Feng S.H.Feng X.T.Feng Y.Feng Y.L.Feng S.Gabici B.Gao C.D.Gao Q.Gao w.Gao w.k.Gao M.M.Ge T.T.Ge L.S.Geng G.Giacinti G.H.Gong Q.B.Gou M.H.Gu F.L.Guo J.Guo X.L.Guo Y.Q.Guo Y.Y.Guo Y.A.Han O.A.Hannuksela M.Hasan H.H.He H.N.He J.Y.He Y.He Y.k.Hor B.w.Hou C.Hou X.Hou H.B.Hu Q.Hu S.C.Hu C.Huang D.H.Huang T.Q.Huang w.J.Huang X.T.Huang X.Y.Huang Y.Huang Y.Y.Huang X.L.Ji H.Y.Jia k.Jia H.B.Jiang k.Jiang X.w.Jiang Z.J.Jiang M.Jin M.M.kang I.karpikov D.khangulyan D.kuleshov k.kurinov B.B.Li C.M.Li Cheng Li Cong Li D.Li F.Li H.B.Li H.C.Li Jian Li Jie Li k.Li S.D.Li w.L.Li w.L.Li X.R.Li Xin Li Y.Z.Li Zhe Li Zhuo Li E.w.Liang Y.F.Liang S.J.Lin B.Liu C.Liu D.Liu D.B.Liu H.Liu H.D.Liu J.Liu J.L.Liu M.Y.Liu R.Y.Liu S.M.Liu w.Liu Y.Liu Y.N.Liu Q.Luo Y.Luo H.k.Lv B.Q.Ma L.L.Ma X.H.Ma J.R.Mao Z.Min w.Mitthumsiri H.J.Mu Y.C.Nan A.Neronov k.C.Y.Ng L.J.Ou P.Pattarakijwanich Z.Y.Pei J.C.Qi M.Y.Qi B.Q.Qiao J.J.Qin A.Raza D.Ruffolo A.Sáiz M.Saeed D.Semikoz L.Shao O.Shchegolev X.D.Sheng F.w.Shu H.C.Song Yu.V.Stenkin V.Stepanov Y.Su D.X.Sun Q.N.Sun X.N.Sun Z.B.Sun J.Takata P.H.T.Tam Q.w.Tang R.Tang Z.B.Tang w.w.Tian L.H.wan C.wang C.B.wang G.w.wang H.G.wang H.H.wang J.C.wang kai wang kai wang L.P.wang L.Y.wang P.H.wang R.wang w.wang X.G.wang X.Y.wang Y.wang Y.D.wang Y.J.wang Z.H.wang Z.X.wang Zhen wang Zheng wang D.M.wei J.J.wei Y.J.wei T.wen C.Y.wu H.R.wu Q.w.wu S.wu X.F.wu Y.S.wu S.Q.Xi J.Xia G.M.Xiang D.X.Xiao G.Xiao Y.L.Xin Y.Xing D.R.Xiong Z.Xiong D.L.xu R.F.xu R.X.xu w.L.xu L.xue D.H.Yan J.Z.Yan T.Yan C.w.Yang C.Y.Yang F.Yang F.F.Yang L.L.Yang M.J.Yang R.Z.Yang w.X.Yang Y.H.Yao Z.G.Yao L.Q.Yin N.Yin X.H.You Z.Y.You Y.H Southwest Jiaotong University School of Astronomy and Space Science Nanjing University Center for Astrophysics Guangzhou University Tsung-Dao Lee Institute & School of Physics and Astronomy Shanghai Jiao Tong University Institute for Nuclear Research of Russian Academy of Sciences Hebei Normal University University of Science and Technology of China LHAASO Collaboration State key Laboratory of Particle Detection and Electronics key Laboratory of Dark Matter and Space Astronomy & key Laboratory of Radio Astronomy Purple Mountain Observatory Chinese Academy of Sciences Research Center for Astronomical Computing Zhejiang Laboratory key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences School of Physics and Astronomy key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center Yunnan University key Laboratory of Cosmic Rays (Tibet University) Ministry of Education Department of Physics The Chinese University of Hong kong key Laboratory of Radio Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai) Sun Yat-sen University Institute of High Energy Physics Institute of Frontier and Interdisciplinary Science Shandong University APC Université Paris Cité CNRS/IN2P3 CEA/IRFU Observatoire de Paris Department of Engineering Physics & Department of Astronomy Tsinghua University School of Physics and Microelectronics Chinese Academy of Sciences Zhengzhou University Yunnan Observatories Chinese Academy of Sciences China Center of Advanced Science and Technology College of Physics Sichuan University School of Physics Peking University Guangxi key Laboratory for Relativistic Astrophysics School of Physical Science and Technology University of Chinese Academy of Sciences Guangxi University Department of Physics Faculty of Science Mahidol University Moscow Institute

The ultra-high-energy（UHE） gamma-ray source 1LHAASO J0007+7303u is positionally associated with the composite SNR CTA1 that is located at high Galactic Latitude b ≈ 10.5°. This provides a rare opportunity to spatially resolve the component of the pulsar wind nebula（PwN） and supernova remnant（SNR） at UHE. This paper conducted a dedicated data analysis of 1LHAASO J0007+7303u using the data collected from December 2019 to July 2023. This source is well detected with significances of 21σ and 17σ at 8-100 TeV and >100 TeV, respectively. The corresponding extensions are determined to be 0.23°±0.03°and 0.17°±0.03°. The emission is proposed to originate from the relativistic electrons accelerated within the PwN of PSR J0007+7303. The energy spectrum is well described by a power-law with an exponential cutoff function dN/dE =（42.4 ± 4.1）(E/（20 TeV）)-2.31±0.11exp(-E/（110±25 TeV）) TeV-1cm-2s-1in the energy range from 8 to 300 TeV, implying a steady-state parent electron spectrum dNe/dEe∝(Ee/（100 TeV）)-3.13±0.16exp[(-Ee/（373±70 TeV）)2] at energies above ≈ 50 TeV. The cutoff energy of the electron spectrum is roughly equal to the expected current maximum energy of particles accelerated at the PwN terminal shock. Combining the X-ray and gamma-ray emission, the current space-averaged magnetic field can be limited to≈ 4.5 μG. To satisfy the multi-wavelength spectrum and the γ-ray extensions, the transport of relativistic particles within the PwN is likely dominated by the advection process under the free-expansion phase assumption.

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