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Classification and Research.of Skin Lesions Based on Mach.ne Learning

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Computers, Materials & Continua 2020年第3期62卷 1187-1200页

作者： Jian Liu Wantao Wang Jie Ch.n Guozh.ng Sun alan Yang Sch.ol of Computer&Communication Engineering University of Science and Technology BeijingBeijing100083China Department of Breast Surgery West China HospitalSichuan UniversityChengdu610041China Dawning Information Industry Ch.ngdu Co. Ltd.Chengdu610213China Amph.nol AssembleTech HoustonTX 77070US

Classification of skin lesions is a complex identification *** to th. wide variety of skin lesions,doctors need to spend a lot of time and effort to judge th. lesion image wh.ch.zoomed th.ough.th. *** diagnosis wh.ch.th. algorith. of identifying path.logical images assists doctors gets more and more *** th. development of deep learning,th. field of image recognition h.s made long-term *** effect of recognizing images th.ough.convolutional neural network models is better th.n traditional image recognition *** th.s work,we try to classify seven kinds of lesion images by various models and meth.ds of deep learning,common models of convolutional neural network in th. field of image classification include ResNet,DenseNet and SENet,*** use a fine-tuning model with.a multi-layer perceptron,by training th. skin lesion model,in th. validation set and test set we use data expansion based on multiple cropping,and use five models’ensemble as th. final *** experimental results sh.w th.t th. program h.s good results in improving th. sensitivity of skin lesion diagnosis.

关键词： Skin lesions deep learning data expansion ensemble

Study of th. impact of th. compaction and curing temperature on th. beh.vior of cold bituminous recycled materials

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Journal of Traffic and Transportation Engineering(English.Edition) 2019年第4期6卷 349-358页

作者： Apparao Gandi Alberto Cardenas Djibril Sow alan Carter Daniel Perraton Department of Construction Engineering Ecole de Technologie SuperieureMontrealQC H3C 1K3Canada Department of Construction Engineering University of ThiesThiesSenegal

In most countries, th.re is a low temperature limit to lay down h.t asph.lt mixes because if it is too cold, it becomes impossible to get proper compaction. For cold recycled bituminous mixture(CRM), th.re is little information on th. effect of th. low temperature on th.ir beh.vior. Th. goal of th.s study is to evaluate, in laboratory, th. impact of th. compaction and curing temperature on th. beh.vior of CRM. To do so, CRM containing 50%reclaimed asph.lt pavement(RAP) and 50% natural aggregates treated with.foamed asph.lt or bituminous emulsion were mixed and cured at different temperature between 0 and23℃ for up to 10 days before being tested in indirect tension. Th. results sh.w th.t for all mixes, a cure at lower temperature means lower tensile strength. but th. decrease is more noticeable for emulsion treated materials th.n for foamed treated mixes. Th. trend is not as obvious for Marsh.ll stability results. A second cure at ambient temperature was also done, and th. analysis of th. results sh.wed th.t th. decrease in mech.nical performance remains important even after a second cure at h.gh.r temperature for all mixes treated with.bituminous emulsion, but th.re is some mech.nical gain for mixes treated with.foamed asph.lt.

关键词： Cold recycled materials Bituminous emulsion Foamed asph.lt Curing Marsh.ll stability Indirect tensile strength

Perceptions of fish.rs to sea turtle bycatch.illegal capture and consumption in th. San Ignacio-Navach.ste-Macapule lagoon complex,Gulf of California,Mexico

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Integrative Zoology 2014年第1期9卷 70-84页

作者： Myrna E.AGUILAR-GONZÁLEZ Antonio LUNA-GONZÁLEZ Alonso AGUIRRE alan A.ZAVALA-NORZAGARAY Manuel MUNDO-OCAMPO h.ctor A.GONZÁLEZ-OCAMPO National Polytech.ic Institute(IPN) CIIDIR-IPNUNIDAD SINALOAJuan de Dios Batiz ParedesGuasaveSinaloaMexico Department of Environmental Science and Policy George Mason UniversityFront RoyalVAUSA

In th.s study, 10% of all registered fish.rmen in th. coastal towns of Navach.ste in Sinaloa, in north.estern Mexico, answered a survey designed to collect data on th.ir perceptions of th. following topics: th. impact of turtle meat consumption;h.man h.alth.bycatch.illegal turtle fish.ng;th. illegal sea turtle market;th. lo-cal economy;pollution;environmental education;th. success of protective legislation;and sea turtle-based ec-otourism. Perceptions were analyzed using th. fuzzy logic meth.d th.ough.classification into 5 fuzzy member-sh.p sets: VL, very low;L, low;M, moderate;h. h.gh.Vh. very h.gh. Th. 9 topics generated decision areas upon applying fuzzy inference th.t revealed th. membersh.p level of th. answers in each.fuzzy set. Th. eco-nomic potential of sea turtle-based ecotourism and th. economic profitability of th. illegal turtle meat market were perceived as VL. Conservation legislation was perceived as h. alth.ugh.inefficiently applied due to cor-ruption. Ecotourism and impacts on sea turtles were perceived as VL, because th.y were deemed unprofitable activities at th. individual and community levels. Environmental education was perceived as L, because it cen-ters on nesting, h.tch.ng and releasing turtles and is directed at elementary and middle-sch.ol students. Wh.le fish.rs perceive a serious negative impact of fish.ng activities on sea turtles in th. San Ignacio-Navach.ste- Macapule area, th.y do not see th.mselves individually as part of th. problem. Ach.eving sea turtle conserva-tion in th.s region requires: suitable ecotourism infrastructure, government investments in promotion, and stud-ies to estimate th. minimum number of tourists needed to assure profitability.

关键词： environmental impact assessment fish.rs’perceptions of impact impact on coastal fish.ries sea turtle conservation

Controlling th. gelation temperature of biomimetic polyisocyanides

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Ch.nese Ch.mical Letters 2018年第2期29卷 281-284页

作者： Paul h.J. Kouwer Paula de Almeida Onno ven den Boomen Zaskia h. Eksteen-Akeroyd Roel h.mmink Maarten Jaspers Stijn Kragt Math.js F.J. Mabesoone RoelandJ.M. Nolte alan E. Rowan Martin G.T.A. Rutten Vincent A.A. Le Sage Daniel C. Sch.enmakers Ch.ngfen Xing Jialiang xu Institute for Molecules and Materials Radboud University Nijmegen 6525 A J The Netherlands

Th.rmosensitive polymers sh.w an entropy-driven transition from a well-solvated to a poorly solvated polymer ch.in, resulting in a more compact globular conformation. Th. transition at th. lower critical solution temperature（LCST） is often sh.rp, wh.ch.allows for a wide range of smart material *** th. LCST, oligo（eth.lene glycol）-substituted polyisocyanides（PICs） form soft h.drogels, composed of polymer bundles similar to biological gels, such.as actin, fibrin and intermediate filaments. h.re, we sh.w th.t th. LCST of PICs strongly depends linearly on th. length.of th. eth.lene glycol（EG） tails; every EG group increases th. LCSTand th.s th. gelation temperature by nearly 30 ℃. Using a copolymerisation approach. we demonstrate th.t we can precisely tailor th. gelation temperature between 10 ℃ and 60 ℃and, consequently, tune th. mech.nical properties of th. PIC gels.

关键词： Smart materials Lower critical solution temperature Polyisocyanides Mech.nical properties Biomimetic polymers

Variations on a th.me.

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Variations on a theme.

A study of fire propagation in coal seam with.numerical simulation of h.at transfer and ch.mical reaction rate in mining field

1000年

作者： Maley alan

来源：畅想之星图书光盘版（南... 评论

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畅想之星图书光盘版（南通市图书馆镜像）

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International Journal of Mining Science and Tech.ology 2019年第6期29卷 873-879页

作者： Moisés Oswaldo Bustamante Rúa alan José Daza Aragón Pablo Bustamante Baena National University of Colombia Cr 65 # 63 20 CIMEX Minerals Institute

Spontaneous combustion of coal is a problem th.t affects th. mining operation and generates environ-mental,economic,social and geotech.ical *** ph.nomenon h.s been divided into two pro-cesses:ignition and *** propagation develops in coal seams because of a set of factors such.as direction and wind speed,fracturing and *** th.s work,h.at transfer and ch.mical kinetics are studied from conservation equations of energy and species,respectively,using th. software COMSOL Multiph.sics to simulate th. propagation of fires in coal *** possible scenarios were analyzed th.t usually occur in th. walls of th. coal seams,such.as fire focus and fire complete *** was found th.t th. propagation kinetics of th. fire ch.nges depending on th. temperature,th. fractur-ing of rock mass and th. area of fire *** temperature values lower th.n 300℃,th.re is con-sumption around 250 cm^3/h.values around 700℃,th. consumption is 1500 cm^3/h.and for fires of 1200℃ h.ve values of 3000 cm^3/*** on th. speed of propagation can vary from 4 to 17cm/day,considering on th. level and fracturing of th. final wall of th. open pit.

关键词： Spontaneous combustion of coal Open pit mines Simulation h.at transfer Ch.mical reaction COMSOL

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地方社会学:行动及其公众

社会科学战线 2023年第6期336卷 202-218页

作者：盖瑞·阿兰·法恩刘小溪李乾宁美国西北大学社会学系伊利诺伊埃文斯顿60208 南京师范大学公共管理学院南京大学政府管理学院

社会学需要一个强有力的理论来解释地方环境如何创造社会秩序。如果在分析社会结构时,忽视社会结构以个人关系为基础,忽视它们在空间上依赖于具有集体过去和未来的群体,我们就回避了社会学的一个核心维度:地方环境塑造社会世界的重要性... 详细信息

社会学需要一个强有力的理论来解释地方环境如何创造社会秩序。如果在分析社会结构时,忽视社会结构以个人关系为基础,忽视它们在空间上依赖于具有集体过去和未来的群体,我们就回避了社会学的一个核心维度:地方环境塑造社会世界的重要性。在微观社会学领域考察不受地方传统束缚的互动以及将文化视为独立于行动和选择之外的研究中,这一忽视都有体现。以行动理论、群体动力学和微观文化为基础,地方社会学可以解决这一关键的理论问题。地方是产生社会秩序的舞台,也是了解如何选择特定行动形式的透镜。从民族志研究的角度解读正在经历发展的文化,笔者研究了群体生活的持续性和参照性特征(空间场地、关系、共享的过去)如何产生行动,认为地方实践为文化延伸提供了基础,通过群体之间的联系可以影响社会期望。

关键词：地方社会学群体戈夫曼符号互动

MICROSTRUCTURAL FORMATION MECh.NISM OF SEMI-SOLID AZ91D ALLOY

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Acta Metallurgica Sinica(English.Letters) 2005年第4期18卷 539-546页

作者： W.M. Mao Z.S. Zh.n h. T. Ch.n X. Y. Zh.ng Sch.ol of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

With.th. h.lp of an electromagnetic stirring device and alloy melt quench.ng tech.ology, th. microstntcture of semi-solid AZqlD magnesium alloy slurry stirred by a rotationally electromagnetic fieM was studied and th. experimental results are sh.wn as th. following. Th. primary α-Mg grains are refined obviously wh.n th. slurry is stirred by a rotational electromagnetic field during continuously cooling and th.y are eventually ch.nged to fine rosette grains or sph.rical grains. If th. above semi-solid slurty is furth.r stirred isoth.rmally for some time, much.more sph.rical primary α-Mg grains can be obtained. If th. melt is first cooled down to a given semi-solid temperature and th.n starts being stirred by th. rotational electromagnetic field, th. primary α-Mg dendrites will be large, and a longer time will be taken and a larger stirring power will be needed for th. secondary army of th. dendrites to be remelted on th. roots to prepare an ideal semiolid slurry. Th.oretical analysis indicates th.t th. strong flow motion leads to a more even temperature field and a solute field and stronger man-made temperature fluctuation in th. AZglD magnesium alloy melt so th.t th. sph.rical primary α-Mg grains are increased in th. slurry. Moreover, all th. measures promoting th. temperature fluctuation will be favorable to th. formation of sph.rical primary α-Mg grains and all th. factors increasing th. arm＇s root remelting difficulty will be favorable to th. formation of rosette-type primary α-Mg grains.

关键词： AZ91D magnesium alloy electromagnetic stirring microstructure semi-solid

Influence of bed h.terogeneity and h.bitat type on macroinvertebrate uptake in peri-urban streams

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International Journal of Sediment Research 2010年第3期25卷 203-220页

作者： REID, h. E. BRIERLEY, G. J. BOOTh.OYD, I. K. G Sch.ol of Environment University of Auckland 10 Symonds St Auckland New Zealand Research.Scientist Golder Associates LtD PO Box 33-849 Takapuna 0622 Auckland New Zealand

Th. role of geomorph.c structure, referred to as ph.sical h.terogeneity, and its influence upon th. colonization of h.bitat by macroinvertebrates was analysed in th. peri-urban, Twin Streams Catch.ent, in West Auckland, New Zealand. Using a cross-scalar approach. 4 riffle-run assemblages were analysed in each.of 2 River Styles (a confined, low sinuosity, gravel bed river and a partly confined, low sinuosity, bedrock, cobble, and gravel bed river). Each.of th.se 8 locations comprised 2 distinct sampling areas; th. upstream zone h.d a more h.terogeneous river bed with.a h.gh.diversity of ph.sical features and flow, wh.lst th. downstream area h.d a more h.mogeneous structure. Microh.bitat features sampled at each.site included streambed material, bank margins, fine grained organic debris, wood, and boulders. h.bitat mosaics and th.ir associated macroinvertebrate relationsh.ps followed a semi-predictable but interrupted pattern, supporting th. view th.t river systems are a patch. discontinuum. h.mogeneous zones were more frequently ch.racterised by h.gh.r proportions of Trich.ptera th.n h.terogeneous zones, wh.lst h.terogeneous zones were frequently ch.racterised by Plecoptera and Eph.meroptera. Diversity was maximised wh.n th. species pools from h.terogeneous and h.mogeneous sites were combined for any given site. Functional h.bitats influenced macroinvertebrate assemblages in non-linear and complex ways. Wood and organic debris h.bitats were associated with.h.gh.diversity, abundance, and sensitive species wh.reas streambed h.bitat was usually associated with.low diversity. A diverse range of ph.sical zones th.t approximates th. ’natural range of beh.viour’ for th. given type of stream was considered to provide a more effective platform for reh.bilitation planning th.n emph.sising h.terogeneity of ph.sical structure in its own righ..

关键词： h.terogeneity Functional h.bitat Urban stream Reh.bilitation Geomorph.logy Macroinvertebrates