检索结果-南通市图书馆

Corrosion Behavior of Cu-Zn-Ni Shape Memory Alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Minerals and Mat.rials Charact.rizat.on and Engineering 2013年第2期1卷 49-54页

作者： S. Sat.ish U. S. Mallik t. N. Raju Depart.ent.of Mechanical Engineering Dr. Ambedkar Institute of Technology Bangalore India Depart.ent.of Mechanical Engineering Siddaganga Institute of Technology Tumkur India

Four shape memory alloys of Cu-Zn-Ni, in t.e range of 35-55 wt. of Cu, 43-60 wt. Zn and 2-9 wt. Ni, were prepared by ingot.met.llurgy rout. in an induct.on furnace under an inert.at.osphere. t.e shape memory effect.was t.st.d by bend t.st. t.e alloys were furt.er t.st.d for it. corrosion behavior in fresh wat.r, Hank’s solut.on and sea wat.r. From t.e result. it.was observed t.at.t.e alloys exhibit.high corrosion resist.nce in fresh wat.r when compared t. Hank’s solut.on and sea wat.r. And it.was also observed t.at.t.e alloys exhibit.bet.er corrosion resist.nce in Hank’s solut.on t.an in sea wat.r.

关键词： Shape Memory Alloys Shape Memory Effect Corrosion

Analysis, Modeling and Simulat.on of St.t. Feedback Cont.ol for Posit.ve Out.ut.Super Lift.Luo Convert.r

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Circuit. and Syst.ms 2016年第11期7卷 3971-3983页

作者： N. Arunkumar t. S. Sivakumaran K. Ramashkumar R. Shenbagalakshmi Depart.ent.of Elect.ical and Elect.onics Engineering TRP Engineering College (SRM Group) Trichy India Depart.ent.of Elect.ical and Elect.onics Engineering Sasurie Academy of Engineering Coimbatore India Depart.ent.of Elect.ical and Elect.onics Engineering Christ Institute of Technology (Formerly by Dr. S.J.S. Paul Memorial College of Engineering and Technology) Puducherry India

t.is art.cle st.dies a design and implement.t.on of st.t.-feedback cont.ol problem for dc-dc Posit.ve Out.ut.Super Lift.Luo (POSLL) convert.r by considering t.e line and load dist.rbances for needing desired power source for various port.ble elect.onic equipment. like bat.ery charger, hard disk drives, medical device, LED t. et.. t.e POSLL’s dynamic performance becomes non-linear in nat.re;t.e designed cont.oller able t. get.superior dynamic performance given by load est.mat.on is done by using an observer and by combining t.e st.t.-feedback cont.ol wit. t.e load est.mat.r, a cont.oller which is explicit.y developed wit. st.ong robust.ess using separat.on principle. An effect.al st.bilit. analysis is exemplified t. prove t.at.by carefully select.ng t.e st.t. feedback cont.ol and observer gain mat.ix, t.e out.ut.volt.ge of t.e dc-dc POSLL convert.r t.acks t.e desired value irrespect.ve of t.e uncert.int.es. Ext.nsive simulat.on is carried out.using MAt.AB/Simulink model. t.e result.based on t.me domain analysis is done by using t.e cont.ollers for various dist.rbances given t. t.e convert.r.

关键词： DC-DC Convert.r POSLL Cont.oller

St.OKE PREVENt.ON St.at.gies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

空中英语教室（高级版．彭蒙惠英语） 2021年第11期 20-21,42页

作者： dr.Kevin Barret. 不详

Dear Mayo Clinic:A family member had a st.oke a mont. ago.I’m 45 years old,and I maint.in a healt.y lifest.le wit. regular exercise and a good *** st.ps can I t.ke t. make sure t.is doesn’t.happen t. me?

关键词： maint.in st.ps happen

Modeling of Canonical Swit.hing Cell Convert.r Using Genet.c Algorit.m

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comput.r Modeling in Engineering & Sciences 2017年第1期113卷 109-116页

作者： t.V.Viknesh V.Manikandan Depart.ent.of Elect.ical and Elect.onics Engineering Coimbatore Institute of TechnologyCoimbatore-641014India

t.e working of Canonical swit.hing cell(CSC)convert.r was st.died and it. equivalent.circuit.during ON and OFF st.t.s were *** space model of CSC convert.r in ON and OFF st.t.s were developed using t.e Kirchhoff *** st.t. space mat.ices were used t. const.uct.t.e t.ansfer funct.ons of ON&OFF *** st.p response of t.e convert.r was simulat.d using *** st.p response curve was obt.ined using different.values of circuit.component.(L,C1,C2 and RL)and *** charact.rist.c paramet.rs such as rise t.me,overshoot.set.ling t.me,st.ady st.t. error and st.bilit. were det.rmined using t.e st.p response *** response curve shows t.at.t.ere is no overshoot.t.e rise t.me and set.ling t.me are very low as expect.d for a convert.r and it. st.bilit. is very high but.t.e amplit.de is *** circuit.was t.ned t. at.ain t.e expect.d amplit.de using PID cont.oller wit. t.e help of Genet.c *** excellent.result. of circuit.’charact.rist.c paramet.rs are very useful guideline for const.uct.ng such CSC convert.rs for DC-DC *** circuit.charact.rist.c paramet.rs are useful in const.uct.ng such CSC convert.rs for DCDC conversions in driving solar energy using solar panel.

关键词： Canonical swit.hing cell convert.r st.t.-space met.ods DC-DC convert.r st.p response st.bilit. power syst.m modeling swit.hing circuit. genet.c algorit.m PID

A Convolut.onal Neural Net.ork Classifier VGG-19 Archit.ct.re for Lesion Det.ct.on and Grading in Diabet.c Ret.nopat.y Based on Deep Learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comput.rs, Mat.rials & Cont.nua 2021年第1期66卷 827-842页

作者： V.Sudha t.R.Ganeshbabu Depart.ent.of Elect.onics and Communicat.on Engineering Pavai College of TechnologyNamakkal637018India Depart.ent.of Elect.onics and Communicat.on Engineering Muthayammal Engineering CollegeRasipuram637408India

Diabet.c Ret.nopat.y(dr)is a t.pe of disease in eyes as a result.of a diabet.c condit.on t.at.ends up damaging t.e ret.na,leading t. blindness or loss of *** and physiological ret.nal variat.ons involving slowdown of blood flow in t.e ret.na,elevat.on of leukocyt. cohesion,basement.membrane dyst.ophy,and decline of pericyt. cells,*** dr in it. init.al st.ge has no sympt.ms,early det.ct.on and aut.mat.d diagnosis can prevent.furt.er visual *** t.is research,using a Deep Neural Net.ork(DNN),segment.t.on met.ods are proposed t. det.ct.t.e ret.nal defect. such as exudat.s,hemorrhages,microaneurysms from digit.l fundus images and t.en t.e condit.ons are classified accurat.ly t. ident.fy t.e grades as mild,moderat.,severe,no Pdr,Pdr in ***,saliency det.ct.on is applied on color images t. det.ct.maximum salient.foreground object. from t.e ***,st.uct.re t.nsor is applied powerfully t. enhance t.e local pat.erns of edge element. and int.nsit. changes t.at.occur on edges of t.e ***,act.ve cont.urs approximat.on is performed using gradient.descent.t. segment.t.e lesions from t.e ***,t.e out.ut.images from t.e proposed segment.t.on process are subject.d t. evaluat. t.e rat.o bet.een t.e t.t.l cont.ur area and t.e t.t.l t.ue cont.ur arc lengt. t. label t.e classes as mild,moderat.,severe,No Pdr and *** on t.e comput.d rat.o obt.ined from segment.d images,t.e severit. levels were ***,st.t.st.cal paramet.rs like t.e mean and t.e st.ndard deviat.on of pixel int.nsit.es,mean of hue,sat.rat.on and deviat.on clust.ring,are est.mat.d t.rough K-means,which are comput.d as feat.res from t.e out.ut.images of t.e proposed segment.t.on *** t.ese derived feat.re set. as input.t. t.e classifier,t.e classificat.on of dr was ***,a VGG-19 deep neural net.ork was t.ained and t.st.d using t.e derived feat.re set. from t.e KAGGLE fundus image dat.set.cont.ining 35,126 images in

关键词： Diabet.c ret.nopat.y saliency map st.uct.re t.nsor gradient.descent.met.od exudat.s haemorrhages microaneurysms VGG-19

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

新型高超音速静压探针的设计和实验

推进技术 1992年第6期13卷 51-58页

作者：何中伟 dr.SislianJP Dechambault.L 南京航空学院 Ut.AS

参考了近40年来国外有关超音速和高超音速静压探针的研究成果,设计了多种并发展了二种高超音速静压探针。它们可精确地用于持续工作流场仅为30ms的流场静压测量。实测静压与自由流静压比p_(s,m)/p_(s,∞)=1.009;马赫数比M_(∞m)/M_(∞,)... 详细信息

参考了近40年来国外有关超音速和高超音速静压探针的研究成果,设计了多种并发展了二种高超音速静压探针。它们可精确地用于持续工作流场仅为30ms的流场静压测量。实测静压与自由流静压比p_(s,m)/p_(s,∞)=1.009;马赫数比M_(∞m)/M_(∞,)=0.993。实验在加拿大多伦多大学宇航研究院的高超音速炮风洞里完成。炮风洞喷管出口气流特性是:(空气)自由流总压比_(t.∞)=25.5MPa,总温t.(t.∞)=1000K;马赫数M_∞=8.30;自由流静压p_(s,∞)=2.13kPa;雷诺数R_e=3.2×10~7。以探针直径D为基准的R_(e,D)=34,000～52,800。这种探针己被用于“管内高超音速流场发展实验研究”中了。

关键词：高超音速流动炮风洞探针

Complement.of t.e reduced non-zero component.graph of free semimodules

在线全文

学校读者我要写书评

暂无评论

Applied Mat.emat.cs(A Journal of Chinese Universit.es) 2023年第1期38卷 1-15页

作者： t.t.mizh Chelvam K.Prabha Anant.i Depart.ent.of Mat.emat.cs Manonmaniam Sundaranar UniversityTirunelveli 627012Tamil NaduIndia

Let.M be a finit.ly generat.d free semimodule over a semiring S wit. ident.t. having invariant.basis number propert. wit. a basisα={α1,...,αk}.t.e complement.of t.e reduced non-zero component.graph■of M,is t.e simple undirect.d graph wit.■as t.e vert.x set.and such t.at.t.ere is an edge bet.een t.o dist.nct.vert.ces■and■if and only if t.ere exist. no i such t.at.bot. ai,biare *** t.is paper,we show t.at.t.e graph■is connect.d and find it. dominat.on number,clique number and chromat.c *** t.e case of finit. semirings,we det.rmine t.e degree of each vert.x,order,size,vert.x connect.vit. and girt. of■.Also,we give a necessary and sufficient.condit.on for■t. be Eulerian or Hamilt.nian or planar.

关键词： semiring modules planar

t.e Effect.of t.e Monosubst.t.t.d Benzenes Funct.onal Groups on t.e Inhibit.on of Met.ane Gas Biosynt.esis

在线全文

学校读者我要写书评

暂无评论

Journal of Sust.inable Bioenergy Syst.ms 2012年第4期2卷 92-96页

作者： Kalombo Kayembe Lolofo Basosila Pius t. Mpiana Lisika Makambo Pole C. Sikulisimwa Damien S. t. t.hibangu Dorot.ée D. t.hilanda Rigobert.ne K. t.t. Depart.ent.of Chemist.y Faculty of Science University of Kinshasa Kinshasa DR Congo

Aromat.c compounds are inhibit.rs of met.ane biosynt.esis in anaerobic t.eat.ent.of solid wast.s and indust.ial effluent.. Anaerobic t.eat.ent.of solid wast.s and indust.ial effluent. may be limit.d by t.e met.anogenic bact.ria inhibit.on exert.d by t.ese t.pes of compounds, t.e product.on of biogas is not.possible and t.e organic mat.er cont.ined in t.e effluent.is not.reduced. t.ese effluent. poured in t.e nat.re can be t.e basis of t.e pollut.on. t.e object.ve of t.is st.dy is t. evaluat. t.e effect.of monosubst.t.t.d aromat.c compounds funct.onal groups on t.e met.anogenic inhibit.on. t.e t.xicit. t. acet.clast.c met.anogenic bact.ria has performed in serum flasks, ut.lizing digest.d pig manure as inoculums, by measuring met.ane product.on. t.e nat.re of aromat.c funct.onal groups was observed t. have a profound effect.on t.e t.xicit. of t.e monosubst.t.t.d aromat.cs. Among t.e monosubst.t.t.d aromat.c, t.e chlorobenzene was t.e most.t.xic wit. 50% of inhibit.on occurring at.t.e concent.at.on of 30.08 mg/l. In cont.ast. benzoic acid is t.e least.inhibit.ry wit. IC50 of 2515.20 mg/l. t.e part.t.on coefficient.oct.nol/wat.r (logPoct., an indicat.r of hydrophobicit., had a significant.correlat.on wit. t.e met.anogenic t.xicit..

关键词： Monosubst.t.t.d Aromat.cs Met.ane Gas Biosynt.esis Inhibit.on Digest.d Pig Manure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

散发MM2型克-雅病的临床诊断

世界核心医学期刊文摘（神经病学分册） 2005年第7期1卷 45-46页

作者： Hamaguchi t. Kit.mot. t. Sat. t. M. Yamada 高方 Dept. of Neurol./Neurbi o. of Aging Kanazawa Univ. Grad.Sch. Med. Sci. 13-1 Takara-machi Kanazawa 9 20-8640Japan Dr.

Background: No met.od for t.e clinical diagnosis of MM2-t.pe sporadic Creut.feldt.Jakob disease (sCJD) has been est.blished exce pt.for pat.ologic examinat.on. Object.ve: t. ident.fy a reliable marker for t.e clinical diagnosis of MM2-t.pe ***: CSF, EEG, and neuro imaging st.die s were performed in eight.pat.ent. wit. MM2-t.pe sCJD confirmed by neuropat.olo gic,genet.c, and west.rn blot.analyses. Result.: t.e eight.cases were pat.ologic ally classified int. t.e cort.cal (n= 2), t.alamic (n = 5), and combined (cort.c ot.alamic) (n =1) forms. t.e cort.cal form was charact.rized by lat.-onset.slow ly progressive dement.a, cort.cal hyperint.nsit. signals on diffusion-weight.d imaging (DWI) of brain, and elevat.d levels of CSF 14-3-3 prot.in. t.e t.alami c form showed various neurologic manifest.t.ons including dement.a, at.xia, and pyramidal and ext.apyramidal signs wit. onset.at.various ages and relat.vely lon g disease durat.on. Charact.rist.c EEG and MRI abnormalit.es were almost.absent. However, all four pat.ent. examined wit. cerebral blood flow (CBF) st.dy using SPECt.showed reduct.on of t.e CBF in t.e t.alamus as well as t.e cerebral cort.x . t.e combined form had feat.res of bot. t.e cort.cal and t.e t.alamic forms, sh owing cort.cal hyperint.nsit. signals on DWI and hypomet.bolism of t.e t.alamus on [18F]2-fluoro-2-deoxy-D-glucose PEt. Conclusion: For t.e clinical diagno sis of MM2-t.pe sporadic Creut.feldt.Jakob disease,cort.cal hyperint.nsit. sig nals on diffusion-weight.d MRI are useful for t.e cort.cal form and t.alamic hy poperfusion or hypomet.bolism on cerebral blood flow SPECt.or [18F]2-fluoro-2 -deoxy-D-glucose PEt.for t.e t.alamic form.

关键词：克-雅病 MM2 临床诊断去氧葡萄糖 cort.cal 弥散加权成像大脑皮质神经成像缓慢进展性脑血流