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Frontiers of Structural and Civil Engineering 2015年第4期9卷 341-358页

作者： M. h. nguyen-th.I Division of Computational Math.matics and Engineering (CME) Institute for Computational Science (INCOS) Ton Duc ThangUniversity Hochiminh city Vietnam Faculty of Civil Engineering Ton Duc Thang University Hochiminh city Vietnam

A cell-based smooth.d discrete sh.ar gap meth.d (CS-FEM-DSG3) was recently proposed and proven to be robust for free vibration analyses of Reissner-Mindlin sh.ll. th. meth.d improves significantly th. accuracy of th. solution due to softening effect of th. cell-based strain smooth.ng tech.ique. In addition, due to using only th.ee-node triangular elements generated automatically, th. CS-FEM-DSG3 can be applied flexibly for arbitrary complicated geometric domains. h.wever so far, th. CS-FEM-DSG3 h.s been only developed for analyzing intact structures with.ut possessing internal cracks. th. paper h.nce tries to extend th. CS-FEM-DSG3 for free vibration analysis of cracked Reissner-Mindlin sh.lls by integrating th. original CS-FEM-DSG3 with.discontinuous and crack–tip singular enrich.ent functions of th. extended finite element meth.d (XFEM) to give a so-called extended cell-based smooth.d discrete sh.ar gap meth.d (XCS-FEM-DSG3). th. accuracy and reliability of th. novel XCS-FEM-DSG3 for free vibration analysis of cracked Reissner-Mindlin sh.lls are investigated th.ough.solving th.ee numerical examples and comparing with.commercial software ANSYS.

关键词： cracked Reissner-Mindlin sh.ll free vibration analysis cell-based smooth.d discrete sh.ar gap meth.d (CS-FEM-DSG3) extended cell-based smooth.d discrete sh.ar gap meth.d (XCS-FEM-DSG3) smooth.d finite element meth.ds (SFEM)

Adaptive selective ES-FEM limit analysis of cracked plane-strain structures

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Frontiers of Structural and Civil Engineering 2015年第4期9卷 478-490页

作者： h. nguyen-XUAN T. RABCZUK Center for Interdisciplinary Research.in Tech.ology Ho Chi Minh City University of Technology (HUTECH) vietnam Institute of Structural Mech.nics Bauhaus-Universitat Weimar Weimar 99423 Germany

th.s paper presents a simple and efficient approach.for predicting th. plastic limit loads in cracked planestrain *** use two levels of mesh.repartitioning for th. finite element limit analysis. th. master level h.ndles an adaptive primal-mesh.process th.ough.a dissipation-based indicator. th. slave level performs th. subdivision of each.triangle into th.ee sub-triangles and constitutes a dual mesh.from a pair of two adjacent sub-triangles sh.red by common edges of th. primal mesh. Applying a strain smooth.ng projection to th. strain rates on th. dual mesh. th. incompressibility constraint and th. flow rule constraint are imposed over th. edge-based smooth.ng domains and everywh.re in th. problem domain. th. limit analysis problem is recast into th. compact form of a second-order cone programming (SOCP) for th. purpose of exploiting interior-point solvers. th. present meth.d retains a low number of optimization variables. It offers a convenient way for designing and solving th. large-scale optimization problems effectively. Several bench.ark examples are given to sh.w th. simplicity and effectiveness of th. present meth.d.

关键词： cracked structure limit analysis von Mises criterion edge-based strain smooth.ng second-order cone programming adaptive

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德国的服务业

世界社会科学 1999年第1期 89-90页

作者：Ｈ．蒂曼,Ｔｈ．考利施

直到８０年代初，生产和就业一直是同步增长的。但“无就业增长的经济增长”现象近来日益明显。德国劳务市场长期萎缩，而美、英、荷、丹麦等国近来却出现了的就业奇迹，于是如何发展服务业领域就成了德国政治讨论的重要话题。人们预料... 详细信息

直到８０年代初，生产和就业一直是同步增长的。但“无就业增长的经济增长”现象近来日益明显。德国劳务市场长期萎缩，而美、英、荷、丹麦等国近来却出现了的就业奇迹，于是如何发展服务业领域就成了德国政治讨论的重要话题。人们预料服务业将提供大量就业机会，美国的就...

关键词：服务行业就业密切相关企业服务业企业管理德国领域知识密集型经济

A stable CS-FEM for th. static and seismic stability of a single square tunnel in th. soil wh.re th. sh.ar strength.increases linearly with.depth

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Journal of Rock Mech.nics and Geotech.ical Engineering 2022年第4期14卷 1253-1265页

作者： h.C.nguyen L.nguyen-Son Department of Civil and Environmental Engineering Imperial College LondonLondonUK Department of Civil Engineering and Industrial Design University of LiverpoolLiverpoolUK Faculty of Civil Engineering Ho Chi Minh City University of Technology(HUTECH)Ho Chi Minh CityViet Nam

A numerical procedure using a stable cell-based smooth.d finite element meth.d(CS-FEM)is presented for estimation of stability of a square tunnel in th. soil wh.re th. sh.ar strength.increases linearly with.*** kinematically admissible displacement fields are approximated by uniform quadrilateral elements in conjunction with.th. strain smooth.ng tech.ique,eliminating volumetric locking issues and th. singularity associated with.th. Moh.eCoulomb ***,a rich.set of simulations was performed to compute th. static stability of a square tunnel with.different geometries and soil *** presented results are in excellent agreement with.th. upper and lower bound solutions using th. standard finite element meth.d(FEM).th. stability ch.rts and tables are given for practical use in th. tunnel design,along with.a newly proposed formulation for predicting th. undrained stability of a single square ***,th. seismic stability number was computed using th. present numerical *** results reveal th.t th. seismic stability number reduces with.an increasing value of th. h.rizontal seismic acceleration(a_(h.),for both.cases of th. weigh.less soil and th. soil with.unit ***,th. link between th. static and seismic stability numbers is described using corrective factors th.t represent reductions in th. tunnel stability due to seismic *** is sh.wn from th. numerical results th.t th. corrective factor becomes larger as th. unit weigh. of soil mass increases;h.wever,th. degree of th. reduction in seismic stability number tends to reduce for th. case of th. h.mogeneous ***,th.s advanced numerical procedure is straigh.forward to extend to th.ee-dimensional(3D)limit analysis and is readily applicable for th. calculation of th. stability of tunnels in h.gh.y anisotropic and h.terogeneous soils wh.ch.are often encountered in practice.

关键词： Tunnels Stability Limit analysis Cell-based smooth.d finite element meth.d (CS-FEM) Second-order cone programming(SOCP)

Vitamin B-reath.easier:vitamin B6 derivatives reduce IL-33 to limit lung inflammation

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Cellular & Molecular Immunology 2023年第12期20卷 1527-1529页

作者： h.th.R.Turnquist th.mas E.Starzl Transplantation Institute University of Pittsburgh School of MedicineDepartment of Immunologyand Department of SurgeryUniversity of Pittsburgh School of MedicinePittsburghPAUSA McGowan Institute for Regenerative Medicine University of PittsburghPittsburghPAUSA

It h.s been known for some time th.t low PLP blood levels are common in asth.atic patients,and supplementation with.vitamin B6 may reduce th. severity of asth.a symptoms[12].In th. current study,a comparison of PLP levels in th. plasma of asth.atic patients(n=52)and h.alth. controls(n=58)confirmed lower PLP concentrations in asth.atic patients,wh.ch.correlated with.reduced lung function and increased circulating eosinoph.ls,suggestive of increased type 2 *** several mouse models of acute lung inflammation,th.y confirmed th.t systemic or local administration of PLP reduced lung inflammation and eosinoph.l density,suggesting th.t PLP concentration may be directly controlling immune responses th.t lead to th. development of allergic airway ***2s constitutively express ST2,and IL-33 profoundly promotes ILC2 expansion and secretion of IL-5 and IL-13 to mediate allergic reactions and support h.st defenses against parasitic *** reduces th. number of type 2 innate lymph.id cells(ILC2s)and th.ir expression of IL-5 and ***,diet-induced vitamin B6 deficiency in mice increased papain-induced lung inflammation,including increasing th. proportion of IL5+and IL-13+*** auth.rs revealed th.t PLP treatment decreased IL-33 levels in th. bronch.alveolar lavage fluid(BALF)and lung and targeting IL-33 with.an antibody during papain-induced lung inflammation did not reduce inflammation beyond th.t of PLP treatment *** important clue to th. regulation of IL-33 was th.t PLP treatment did not modify IL-33 mRNA ***,pyridoxal(PL)treatment of a h.man alveolar basal epith.lial cell line(A549)stably expressing full-length.IL-33 with.a h.magglutinin(h.)tag establish.d th.t PL exposure potently decreased intracellular IL-33 protein *** research.rs used th.s cell line to explore th. underlying mech.nisms and verified th.t PL conversion to PLP by pyridoxal kinase(PDXK)controlled th. stability of *** with.th.se data,th

关键词： vitamin inflammation inh.bited

th.oretical Study of Laser Emission for C-Like (Ar XIII), (Ti XVII) and (Fe XXI)

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Open Journal of Applied Sciences 2016年第4期6卷 217-233页

作者： Wessameldin S. Abdelaziz th. M. El Sh.rbeni Nah.d h. Wah.a National Institute of Laser Enh.nced Sciences Cairo University Giza Egypt Laser and New Materials Laboratory Physics Department Faculty of Science Cairo University Giza Egypt

Energy levels, transition probability and oscillator strength. h.ve been calculated for th. Ar XIII, Ti XVII and Fe XXI. th. configurations included in th. calculations are 2s2 2p2, 2s2 2p 3l (l = s, p & d) and 4l (l = s, p, d, & f) of C-like Ar XIII, Ti XVII & Fe XXI wh.ch.h.s 69 fine structures by using th. fully relativistic flexible atomic code (FAC) program. th.se data are used in th. determination of th. reduced population and gain coefficients over a wide range of electron densities from (10+18 to 10+23) and at various plasmas temperatures. th. results sh.w th.t th. transitions in Ar18+, Ti22+, and Fe26+ ions are th. most promising laser emission lines in th. XUV and soft X-ray spectral regions.

关键词： XUV Soft X-Ray Laser Radiation Population Inversion Gain Coefficient

Detection of Abnormal Network Traffic Using Bidirectional Long Sh.rt-Term Memory

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Computer Systems Science & Engineering 2023年第7期46卷 491-504页

作者： Nga nguyen th. th.nh.Quang h.nguyen Sch.ol of Information and Communication Tech.ology Hanoi University of Science and TechnologyHanoi10000Vietnam

Nowadays,web systems and servers are constantly at great risk from *** paper proposes a novel approach.to detecting abnormal network traffic using a bidirectional long sh.rt-term memory(LSTM)network in combination with.th. ensemble learning ***,th. binary classification module was used to detect th. current abnormal ***,th. abnormal flows were fed into th. multilayer classification module to identify th. specific type of *** th.s research.a deep learning bidirectional LSTM model,in combination with.th. convolutional neural network and attention tech.ique,was deployed to identify a specific *** solve th. real-time intrusion-detecting problem,a stacking ensemble-learning model was deployed to detect abnormal intrusion before being transferred to th. attack classification *** class-weigh. tech.ique was applied to overcome th. data imbalance between th. attack *** results sh.wed th.t our approach.gained good performance and th. F1 accuracy on th. CICIDS2017 data set reach.d 99.97%,wh.ch.is h.gh.r th.n th. results obtained in oth.r research.

关键词： Intrusion detection systems abnormal network traffics bi-directional lstm convolutional neural network ensemble learning

th.rmo-optic ch.racterization of KDP single crystals by a modified Snarmont setup for electro-optic modulation system

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Ch.nese Optics Letters 2009年第7期7卷 632-639页

作者： h. L. Saadon M. A. Rah.a Ali F. Marh.on N. th.ofanous M. Aillerie Department of Informatics and Telecommunications Optoelectronics Group University of AthensPanepistimiopolis Ilisia GR-157 84 Athens Greece Department of Ph.sics College of Science University of BasrahBasrah Iraq Laboratoire Matriaux Optiques Photonique et Systmes UMR CNRS 7132 Universit de Metz et Suplec2 rue E. Belin 57070 Metz France

For our KDP crystal orientation, various tbermo-optic （TO） and relevant temperature-dependence param- eters are defined, presented, and studied in th. framework of a transverse and a longitudinal electro-optic （EO） modulation systems. th.s study is based on th. concept of th. so-called opto-electrical bias （~） ap- plied to th. system. For both.of th. above EO-modulation systems, a set of original equations is extracted and investigated with.regard to each.of th. more important TO or temperature coefficients. Using th.se equations, for th.se parameters th. role of th. transverse configuration is examined in comparison with.its corresponding longitudinal configuration. A comparison is done with.oth.r orientation of th. same KDP crystal.

关键词： narmont setup for electro-optic modulation system th.rmo-optic ch.racterization of KDP single crystals by a modified S KDP

Some Mean Convergence th.orems for th. Maximum of Normed Double Sums of Banach.Space Valued Random Elements

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Acta Math.matica Sinica,English.Series 2024年第7期40卷 1727-1740页

作者： Andrew ROSALSKY Le Van th.Nh.nguyen th. th.Y Department of Statistics University of FloridaGainesvilleFL 32611-8545USA Department of Math.matics Vinh UniversityVinhNghe AnViet Nam h.gh.Sch.ol for Gifted Students Vinh UniversityVinhNghe AnViet Nam

In th.s correspondence,we establish.mean convergence th.orems for th. maximum of normed double sums of Banach.space valued random *** of th. results pertain to random elements wh.ch.are *** expand and improve a number of particular cases in th. literature on mean convergence of random elements in Banach.*** of th. main contributions of th. paper is to simplify and improve a recent result of Li,Presnell,and Rosalsky[Journal of Math.matical Inequalities,16,117–126(2022)].A new maximal inequality for double sums of M-dependent random elements is proved wh.ch.may be of independent *** sh.rpness of th. results is illustrated by four examples.

关键词： Double sum mean convergence Rademach.r type p Banach.space Banach.space valued random element M-dependent random elements

Dietary soluble non-starch.polysacch.ride level and xylanase supplementation influence performance,egg quality and nutrient utilization in laying h.ns fed wh.at-based diets

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Animal Nutrition 2021年第2期7卷 512-520页

作者： Xa h.nguyen h.ng T.nguyen Natalie K.Morgan University of New England School of Environmental and Rural ScienceArmidaleNew South Wales2351Australia

th. aim of th.s study was to evaluate th. effects of dietary soluble non-starch.polysacch.ride(sNSP)content and xylanase supplementation on production performance,egg quality parameters,and nutrient di-gestibility in h.-line Brown layers from 25 to 32 wk of age.A total of 144 h.-line Brown laying h.ns(25 wk of age)were randomly allocated to 1 of 4 wh.at-based dietary treatments in a 2×2 factorial experimental design,with.36 replicates of individual h.ns per *** diets were formulated to contain eith.r a h.gh.or low sNSP level(at 13.3 or 10.8 g/kg)and were supplemented with.eith.r 0 or 12,000 BXU/kg exogenous *** were fed th.se treatment diets for an 8-wk period,and h.n production perfor-mance,including daily egg production,average egg weigh.,daily egg mass,feed conversion ratio and pro-portion of dirty and abnormal eggs were measured at bird age 25 to 28 wk and 29 to 32 *** interaction between sNSP content of th. diet and xylanase supplementation was observed on daily egg production from 25 to 28 wk of age(P-0.018);birds fed th. h.gh.sNSP diet with.ut xylanase h.d lower egg production th.n th.se fed any oth.r *** interaction between th. 2 dietary factors was also observed on h.n weigh. gain at 29 to 32 wk of age(P=0.014),with.birds fed th. low sNSP diet with.12,000 BXU/kg xylanase presenting greater weigh. gain compared to th.se fed th. h.gh.sNSP diet with.12,000 BXU/kg *** intake at 29 to 32 wk of age was reduced by xylanase supplementation(P=0.047).Xylanase supplemen-tation also increased yolk colour score at both.28 and 32 wk of age,and decreased yolk weigh. at 32 wk of age(P-0.014,0.037 and 0.013,respectively).Birds fed th. low sNSP diet presented lower protein digestibility(P-0.024)th.n th.se fed th. h.gh.sNSP ***,birds fed h.gh.sNSP presented h.gh.r sh.ll reflectivity at both.28 and 32 wk of age(P-0.05 and 0.036,respectively).th. influence of duration of feeding th. treatment diets on egg quality was also

关键词： Soluble NSP Xylanase Laying h.n Production performance Egg quality