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Monitoring and Early Warning of New Cyber-Telecom Crime Platform Based on BERT Migration Learning

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China Communications 2020年第3期17卷 140-148页

作者： Shengli Zhou Xin Wang Zerui yang Information Department of Zhejiang Police College Hangzhou 310053China International School of Zhejiang Police College Hangzhou 310053China

The network is a major platform for implementing new cyber-telecom ***,it is important to carry out monitoring and early warning research on new cyber-telecom crime platforms,which will lay the foundation for the establishment of prevention and control systems to protect citizens’***,the deep-learning methods applied in the monitoring and early warning of new cyber-telecom crime platforms have some apparent *** instance,the methods suffer from data-distribution differences and tremendous manual efforts spent on data ***,a monitoring and early warning method for new cyber-telecom crime platforms based on the BERT migration learning model is *** method first identifies the text data and their tags,and then performs migration training based on a pre-training ***,the method uses the fine-tuned model to predict and classify new cyber-telecom *** analysis on the crime data collected by public security organizations shows that higher classification accuracy can be achieved using the proposed method,compared with the deep-learning method.

关键词： new cyber-telecom crime BERT model deep learning monitoring and warning text analysis

Multi-scale modelling of gas flow in nanoscale pore space with fractures

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第1期12卷 32-40页

作者： Qingrong Xiong Diansen yang Weizhong Chen Research Centre for Radwaste&Decommissioning and Modelling&Simulation Centre Dalton Nuclear InstituteUniversity of ManchesterManchesterM139PLUK School of Mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China

In this work,a multi-scale pore network with fractures is developed against experimental data in a wide range of degrees of water *** pore network is constructed based on the measured microstructure information at several length *** gas transport is predicted by different gas transport equations(***,dusty gas model(DGM),Civan and Klinkenberg),which can consider the fundamental physics mechanisms in tight porous media,such as Knudsen diffusion and viscous ***,the model is applied to simulating the gas permeability of the Callovo-Oxfordian(COx)*** predicted gas permeability is basically in good agreement with the experimental data under different degrees of water *** the effects of micro-fissures are *** results suggest that this model can predict the gas flow in other tight porous media as well and can be applied to other fields such as carbon capture and storage.

关键词： Pore network Nanopores Apparent gas permeability Callovo-Oxfordian(COx)claystone

Stable and non-symmetric pitchfork bifurcations

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Science China Mathematics 2020年第9期63卷 1837-1852页

作者： Enrique Pujals Michael Shub Yun yang Department of Mathematics Graduate CenterCity University of New YorkNew YorkNY 10016USA Department of Mathematics City College of New YorkNew YorkNY 10031USA Department of Mathematics Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA

In this paper,we present a criterion for pitchfork bifurcations of smooth vector elds based on a topological *** result expands Rajapakse and Smale's result[15]signi *** on our criterion,we present a class of families... 详细信息

关键词： pitchfork bifurcation index non-symmetric vector eld center manifold

Core-shell-structured Composite ZSM-5@MCM-41 Catalysts:Fabrication,Characterization,and Enhanced Performance in Hexane Catalytic Cracking

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China Petroleum Processing & Petrochemical Technology 2023年第4期25卷 41-51页

作者： Zhu Jiale Zhu Xuedong yang Fan State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science&TechnologyShanghai 200237China

A series of core-shell zeolites with a ZSM-5 zeolite core and a MCM-41 shell with varying shell thicknesses were successfully fabricated via a cetyltrimethylammonium bromide(CTAB)-directed sol-gel coating method in an ultradilute solution. Extensive characterization techniques, including XRD, TEM, N_(2) adsorption-desorption, NH_(3)-TPD, and IR measurements, confirmed the successful coating of a microporous ZSM-5 core with a mesoporous MCM-41 shell layer and were further employed to explore the textural properties and acidic properties of the samples. The hexane cracking results revealed a significant enhancement in olefin yields after introducing the MCM-41 shell to ZSM-5. Interestingly, a volcanic trend in olefin yields was observed with the increase in the shell thickness. In particular, the highest olefin yield of 51.5%, exceeding that of the core catalyst by 17.1%, was achieved when the shell thickness was controlled at 40 ***, the catalyst lifetime investigation revealed that the core-shell composite catalyst exhibited a minimal reduction in hexane conversion of merely 3.8% over a 120 h reaction period, significantly outperforming the 11.3% reduction exhibited by the core catalyst. This remarkable catalytic performance was attributed to the passivation of external acid sites and the introduction of more developed pore channels by the shell, which effectively mitigated unwanted side reactions. The successful synthesis of these core-shell structured catalysts presents a novel strategy for improving catalytic performance in hexane cracking, in addition to serving as a solid foundation for the design of industrial catalysts for light naphtha cracking.

关键词： catalytic cracking light olefin core-shell ZSM-5 zeolite

Phonon-phonon interaction and parametric down-conversion generation in multimode optomechanical systems

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Communications in Theoretical Physics 2023年第3期75卷 20-28页

作者： Zhen-yang Peng Ying-Dan Wang CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

We studied the process of polariton conversion in a 3-mode nonlinear optomechanical *** with the standard 2-mode optomechanical system,we find a much larger conversion rate of polariton modes can be achieved under typical dissipation *** obtain a transparent understanding of the relevant physical process,we show that in the large detuned case,the cavity can be eliminated adiabatically,resulting in a parametric down-conversion(PDC)interaction between two phononic polariton *** tuning cavity detuning,the nonlinear interaction can be enhanced with the frequency-matching *** from analytical treatment based on the effective PDC model agree with the numerical *** a system provides potential applications in nonlinear phononics.

关键词： nonlinear optomechanical system parametric down-conversion adiabatic elimination

Microstructure Characteristics and Elevated Temperature Mechanical Properties of a B Containedβ-solidifiedγ-TiAl Alloy

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 738-746页

作者：王秀琦 GUO Ruiqi 刘国怀 LI Tianrui yang Yuxuan CHEN yang XIN Meiling WANG Zhaodong State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China School of Materials Science and Engineering Harbin Institute of Technology at ShenzhenShenzhen 518055China School of Metallurgical Engineering Anhui University of TechnologyMaanshan 243000China

The improved microstructure and enhanced elevated temperature mechanical properties of Ti-44Al-5Nb-(Mo,V,B)alloys were obtained by vacuum arc re-melting(VAR)and primary annealing heat treatment(HT)of 1260℃/6 h/Furnace cooling(FC).The phase transformation,microstructure evolution and tensile properties for as-cast and HTed alloys were *** indicate that three main phase transformation points are determined,T_(eut)=1164.3℃,T_(γsolv)=1268.3℃and T_(βtrans)=1382.8℃.There are coarse lamellar colonies(300μm in length)and neighbor reticular B2 andγgrain(3-5μm)in as-cast alloy,while lamellar colonies are markedly refined and multi-oriented(20-50μm)as well as the volume fraction and grain sizes of equiaxedγand B2 phases(about 15μm)significantly increase in as-HTed *** transformations involvingα+γ→α+γ+β/B2 and discontinuousγcoarsening contribute to the above ***(1-3μm)act as nucleation sites forβ_(eutectic) and produce massiveβgrains with different orientations,thus effectively refining the lamellar colonies and forming homogeneous multi-phase *** curves show both the alloys exhibit suitable performance at 800℃.As-cast alloy shows a higher ultimate tensile stress of 647 MPa,while a better total elongation of more than 41%is obtained for as-HTed *** mechanical properties improvement is mainly attributed to fine,multi-oriented lamellar colonies,coordinated deformation of homogeneous multi-phase microstructure and borides within lamellar interface preventing crack propagation.

关键词： TiAl alloy phase transformation heat treatment boride microstructure mechanical properties

A copper-based metal-organic framework for upgrading natural gas through the recovery of C_(2)H_(6) and C_(3)H_(8)

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Green Chemical Engineering 2023年第1期4卷 81-87页

作者： Shao-Min Wang Qing-Yuan yang School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an710049China

Natural gas processing involves the separation of higher hydrocarbons(C2–C3)from methane,which is an important and energy-intensive *** this paper,we present a comprehensive study of an innovative copper-based MOF(Cu-MOF)for the separation of propane and ethane from *** material exhibits a high adsorption capacity and selectivity for C2–C3 hydrocarbons over methane,which is primarily due to its preferential C2–C3 hydrocarbon *** adsorption isotherms at ambient conditions showed a remarkable uptake of C_(3)H_(8)of 134.0 cm^(3)/g,as well as excellent selectivity of 204 and 9 for C_(3)H_(8)/CH_(4)and C_(2)H_(6)/CH_(4).According to the theoretical calculations,differences in van der Waals interactions and polarizability of the guest molecules were responsible for influencing separation *** addition,we conducted adsorption kinetic experiments,dynamic breakthrough,and cycling experiments to further examine the separation ***,this research establishes an energy-efficient adsorbent for upgrading natural gas.

关键词： Natural gas Adsorption Separation Light hydrocarbons MOF

Receptor-like Kinases in Root Development:Current Progress and Future Directions

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Molecular Plant 2021年第1期14卷 166-185页

作者： yang Ou Hong Kui Jia Li Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations School of Life SciencesLanzhou UniversityLanzhou 730000China

Cell-to-cell and cell-to-environment communications are critical to the growth and development of *** surface-localized receptor-like kinases(RLKs)are mainly involved in sensing various extracellular signals to initiate their corresponding cellular *** important vegetative organs for higher plants to adapt to a terrestrial living situation,roots play a critical role for the survival of *** has been demonstrated that RLKs control many biological processes during root growth and *** this review,we summarize several key regulatory processes during Arabidopsis root developm ent in which RLKs play critical *** also put forward a number of relevant questions that are required to be explored in future studies.

关键词： receptor-like kinase root development Arabidopsis

Multi-functional Hollow Structures for Intelligent Drug Delivery

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Chemical Research in Chinese Universities 2024年第3期40卷 394-412页

作者： HOU Ping yang Nailiang WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing 100049P.R.China

Multi-fountional hollow structures have emerged as promising platforms for intelligent drug delivery due to their unique properties,such as high loading capacities and programmed drug *** particular,hollow multishell structures(HoMSs)with multilevel shell and space can regulate the molecular-level interaction between drugs and materials,so as to achieve the temporal-spatial order and sequential release of *** anisotropic hollow structures can control the drug diffusion process by inducing the macroscopic interface flow through autonomous movement,realizing the targeted drug transport and *** this paper,a key focus will be HoMSs with their temporal-ordered architectures and anisotropic hollow carriers with directional *** synthesis mechanisms,structure-property relationships,smartly programmed drug delivery and biomedical applications will be discussed,providing insights into designing next-generation intelligent drug carriers.

关键词： Hollow multishell structure Anisotropic hollow structure Intelligent drug carrier Temporal-spatial order Directional movement