检索结果-南通市图书馆

Jet formation in shock-heavy gas bubble interaction

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2013年第1期29卷 24-35页

作者： Zhi-Gang Zhai ting Si Li-Yong Zou Xi-Sheng luo Department of Modern Mechanics University of Science and Technology of China National Key Laboratory of Shock Wave and Detonation Physics Institute of Fluid Physics CAEP

The influences of the acoustic impedance and shock strength on the jet formation in shock-heavy gas bubble interaction are numerically studied in this work. The process of a shock interacting with a krypton or a SF6 bubble is studied by the numerical method VAS2D. As a validation, the experiments of a SF6 bubble accelerated by a planar shock were performed. The results indicate that, due to the mismatch of acoustic impedance, the way of jet formation in heavy gas bubble with different species is diversified under the same initial condition. With respect to the same bubble, the manner of jet formation is also distinctly different under different shock strengths. The disparities of the acoustic impedance result in different effects of shock focusing in the bubble, and different behaviors of shock wave inside and outside the bubble. The analyses of the wave pattern and the pressure variation indicate that the jet formation is closely associated with the pressure perturbation. Moreover, the analy- sis of the vorticity deposition, and comparisons of circulation and baroclinic torque show that the baroclinic vorticity also contributes to the jet formation. It is concluded that the pres- sure perturbation and baroclinic vorticity deposition are the two dominant factors for the jet formation in shock-heavy gas bubble interaction.

关键词： Shock-bubble interaction - Heavy gas bubble Acoustic impedance Jet

Regularity of Global Attractor for Atmospheric Circulation Equations with Humidity Effect

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2019年第4期35卷 820-829页

作者： Jiao-jiao PAN Qian JIANG ting-wei RUAN Hong luo School of Mathematical Sciences Sichuan Normal University

In this article, regularity of the global attractor for atmospheric circulation equations with humidity effect is considered. It is proved that atmospheric circulation equations with humidity effect possess a global attractor in H^k(?, R^4) for any k≥0, which attracts any bounded set of H^k(Ω, R^4) in the H^k-norm. The result is established by means of an iteration technique and regularity estimates for the linear semigroup of operator, together with a classical existence theorem of global attractor.

关键词： global attractor regularity atmospheric circulation equations humidity effect

Influence of melt spinning and annealing treatment on structures and hydrogen storage thermodynamic properties of La0.8Pr0.2MgNi3.6Co0.4 alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2020年第1期27卷 114-120页

作者： ting-ting Zhai Ze-ming Yuan Feng Hu Long luo Yong-zhi Li Hao Sun Dian-chen Feng Yang-huan Zhang School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou 014010Inner MongoliaChina Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China

La0.8Pr0.2MgNi3.6Co0.4 alloys were prepared by induction melting,annealing and melt spinning *** influences of annealing treatment and melt spinning on phase structure and hydrogen storage properties were systematically *** results of X-ray diffraction determine that the as-cast and as-spun La0.8Pr0.2MgNi3.6Co0.4 alloys consist of LaMgNi4 and LaNi5 phases,while only LaMgNi4 phase is present in the as-annealed *** scanning electron microscope images illustrate that the grain of the alloy is significantly refined by melt spin ning tech no *** gaseous hydrogen storage kinetic and thermodynamic properties were measured by using a Sievert's apparatus at different *** maximum hydrogen storage capacity of the as-cast,as?spun and as-annealed La0.8Pr0.2MgNi3.6Co0.4 alloy is 1.699,1.637 and 1.535 wt.% at 373 K and 3 MPa,*** annealed alloy has flatter and wider pressure plateaus compared with the as-cast and as-spun alloys,which correspond to the hydrogen absorption and desorption process of LaMgNi4 and corresponding ***,the enthalpy and entropy changes of LaMgNi4 during hydrogenation at different temperatures were calculated using Van't Hoff methods.

关键词： Hydrogen storage Multiphase structure Annealing Melt spinning Thermodynamics

Ensemble Bayesian method for parameter distribution inference:application to reactor physics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2023年第12期34卷 216-228页

作者： Jia‑Qin Zeng Hai‑Xiang Zhang He‑Lin Gong Ying‑ting luo School of Mathematics Sichuan UniversityChengdu 610065China Paris Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai 200240China

The estimation of model parameters is an important subject in *** this area of work,the prevailing approach is to estimate or calculate these as deterministic *** this study,we consider the model parameters from the perspective of random variables and describe the general form of the parameter distribution inference *** this framework,we propose an ensemble Bayesian method by introducing Bayesian inference and the Markov chain Monte Carlo(MCMC)*** on a finite cylindrical reactor and a 2D IAEA benchmark problem show that the proposed method converges quickly and can estimate parameters effectively,even for several correlated parameters *** experiments include cases of engineering software calls,demonstrating that the method can be applied to engineering,such as nuclear reactor engineering.

关键词： Model parameters Bayesian inference Frequency distribution Ensemble Bayesian method KL divergence

Preparation of （2E）-3-（4＇-Halophenyl）prop-2-enoyl Sulfachlorpyridazine Sodium Salts and Their Interaction with Bovine Serum Albumin by Fluorescence Spectroscopy

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2013年第5期29卷 854-860页

作者： DU Chuan-rong luo Xuan WEI Jin-rui HE ting-ting ZHENG Xiao-yu LIN Cui-wu School of Chemistry and Chemical Engineering Guangxi University Nanning 530004 P. R. China

Three （2E）-3-（4＇-halophenyl）prop-2-enoyl sulfachlorpyridazine sodium salts（XPSCA） were synthesized. Their chemical structures were confirmed by IH NMR and 13C NMR, electrospray ionization mass spectrometry （ESI-MS）, and infrared（IR） spectroscopy. The interactions between XPSCA and bovine serum albumin（BSA） were investigated under imitated physiological condition by fluorescence quenching technique and UV-Vis absorption spectroscopy according to the Stern-Volmer equation. The results from the emission quenching at different tempera- tures indicate that the quenching mechanism of serum albumin by XPSCA was static quenching mechanism at low XPSCA concentrations or a combined quenching（static and dynamic） mechanism at higher XPSCA concentrations. At different temperatures, the binding constant and the binding sites of XPSCA with BSA were investigated, and the distances were evaluated according to F6rster non-radiative resonance energy transfer theory. The thermodynamic parameters were calculated according to van＇t Hoff equation, which implies that both van der Waals interaction and hydrogen bond played major roles in stabilizing the XPSCA-BSA complexes, whereas hydrophobic interactions were secondary. Moreover, the conformational changes in BSA were analyzed by synchronous fluorescence spectra.

关键词： Sulfachlorpyridazine sodium Bovine serum albumin Halo-cinnamic acid Fluorescence spectroscopy

PINPOINT SOURCE LOCALIZATION FOR OCULAR NONSELECTIVE ATTENTION WITH COMBINATION OF ERP AND fNIRI MEASUREMENTS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2008年第2期1卷 195-206页

作者： ting LI LI LI PENG DU QINGMING luo HUI GONG Britton Chance Center for Biomedical Photonics National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China

Compared with event-related potential(ERP)which is widely used in psychology research,functional near-infrared imaging(fNIRI)is a new technique providing hemodynamic information related to brain activity,except for electrophysiological ***,we use both these techniques to study ocular *** conducted a series of experiments with a classic paradigm of ocular nonselective attention,and monitored responses with fNIRI and ERP *** results showed that fNIRI measured brain activations in the left prefrontal lobe,while ERPs showed activation in frontal *** importantly,only with the combination measurements of fNIRI and ERP,we were then able to find the pinpoint source of ocular nonselective attention,which is in the left and upper corner in Brodmann area *** results demonstrated that fNIRI is a reliable technique in psychology,and the combination of fNIRI and ERP can be promising to reveal more information in the research of brain mechanism.

关键词： Functional near-infrared imaging(fNIRI) event-related potential(ERP) ocular nonselective attention hemoglobin

Trust routing algorithm based on multiple decision factor theory in OSPF protocol

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2013年第5期20卷 104-109页

作者： HAN ting luo Shou-shan ZHU Hong-liang XIN Yang Information Security Center Beijing University of Posts and Telecommunications National Engineering Laboratory for Disaster Backup and Recovery Beijing Safe-Code Technology Co.Ltd.

This paper presents a novel trust model based on multiple decision factor theory （MDFT） and a trust routing algorithm based on MDFT to exactly evaluate routing node trust and establish a trustworthy routing path. MDFT integrates four dimensional trust decision factors including behavior, state, recommend and node liveness to realize an exactly finer-grained trust evaluation. On the basis of MDFT, a trust routing algorithm is presented and validated in open shortest path first （OSPF） protocol. Simulation resuRs show that the algorithm can reflect the routing node trust accurately and has better dynamic response ability. Under the circumstance of existing deceptive nodes, the algorithm has better anti-deception performance and higher attack node detection rate than conventional algorithm.

关键词： routing node trust multiple decision factor theory trust routing algorithm OSPF protocol

KSKV:Key-Strategy for Key-Value Data Collection with Local Differential Privacy

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第6期139卷 3063-3083页

作者： Dan Zhao Yang You Chuanwen luo ting Chen Yang Liu Artificial Intelligence Development Research Center Institute of Scientific and Technical Information of ChinaBeijing100038China Industry Development Department NSFOCUS Inc.BeijingChina School of Information Science and Technology Beijing Forestry UniversityBeijing100083China School of Computer Science and Engineering University of Electronic Science and Technology of ChinaChengdu610054China Institute of Computing Technology China Academy of Railway Sciences Corporation LimitedBeijing10081China

In recent years,the research field of data collection under local differential privacy(LDP)has expanded its focus fromelementary data types to includemore complex structural data,such as set-value and graph ***,our comprehensive review of existing literature reveals that there needs to be more studies that engage with key-value data *** studies would simultaneously collect the frequencies of keys and the mean of values associated with each ***,the allocation of the privacy budget between the frequencies of keys and the means of values for each key does not yield an optimal utility *** the importance of obtaining accurate key frequencies and mean estimations for key-value data collection,this paper presents a novel framework:the Key-Strategy Framework forKey-ValueDataCollection under ***,theKey-StrategyUnary Encoding(KS-UE)strategy is proposed within non-interactive frameworks for the purpose of privacy budget allocation to achieve precise key frequencies;subsequently,the Key-Strategy Generalized Randomized Response(KS-GRR)strategy is introduced for interactive frameworks to enhance the efficiency of collecting frequent keys through group-anditeration *** strategies are adapted for scenarios in which users possess either a single or multiple key-value ***,we demonstrate that the variance of KS-UE is lower than that of existing *** claims are substantiated through extensive experimental evaluation on real-world datasets,confirming the effectiveness and efficiency of the KS-UE and KS-GRR strategies.

关键词： Key-value local differential privacy frequency estimation mean estimation data perturbation

Effects of Particle Size on Nitridation Kinetics of Manganese Powder

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2015年第6期22卷 543-550页

作者： ting luo Jian-hua LIU Hong-bo LIU Jian LIU Research Institute of Metallurgy Engineering University of Science and Technology Beijing

Isothermal thermo-gravimetric analysis was applied to investigate the nitridation kinetics of manganese powder with different particle sizes at 800, 900 and 1000 ℃. The apparent activation energy and nitridation kinetics equations of manganese powder with different particle sizes were obtained from unreacted shrinking core model and Arrhenius formula. It was found that the nitridation mechanism was controlied by interracial chemical reaction. The apparent activation energy and the apparent rate constant of nitridation reaction were affected by particle sizes. With the decrease of particle size, the apparent activation energy decreased whilst the apparent rate constant increased. It was suggested that the refinement of the manganese powder contributed to the increase of molar surface energy, which accounted for the lower apparent activation energy.

关键词： manganese powder nitridation isothermal thermo-gravimetric analysis apparent activation energy kinetics