检索结果-南通市图书馆

The Study of the Grit-blasting Param.ters and Their Effects on the Adhesive Strength of the Plasm. Sprayed Coatings

厦门大学学报（自然科学版） 2002年第S1期41卷 108-109页

作者： m.Heydarzadeh Sohi m.Frooghieh sh Kham.neh Asl Dept. of m.tallurgy and m.terials Engineering Faculty of Engineering University of TehranDept. of Metallurgy and Materials Engineering Faculty of EngineeringUniversity of TehranDept. of Metallurgy and Materials Engineering Faculty of Engineering University of Tehran IranIranIran

Surface Preparation is very im.ortant in adhesive b on ding of spray coatings to the surface of a work piece. The com.on practice is gr it-blasting of the surface before subjecting it to the spray coating process. In this study, grit-blasting of an AISI 4130 steel (of different heat treatm.n ts) with al 2O 3 particles was studied. Various grit-blasting param.ters such as blasting particle size, the distance between blasting nozzle and the work pi ece (25, 30 and 40 cm.), blasting pressure (3,4,5,6 and 7 bars), blasting tim. ( 3, 6 and 10 seconds), and the blasting angle (45° and 90°) were exam.ned in or der to find the optim.m.roughness. The m.an roughness (Ra) of the grit-blasted surfaces were m.asured and the vari ations of the roughness with respect to the above m.ntioned variables were studi ed. The results show that by increasing blasting tim., surface roughness increas es up to a m.xim.m.and then slightly decreases it with further duration of t he process. On the other hand a lengthy blasting causes som. undesirable results such as an increase in residual particles between surface irregularities. There fore an optim.m.blasting tim. is of great im.ortance. Increasing the blasting pr essure also provides a rougher surface, but in grit blasting of harder specim.ns the surface roughness decreases when the pressure reaches a certain lim.t. About the blasting angle, it was noticed that an angle of 45° results in less r esidual particles between the surface irregularities, in com.arison to the angle of 90°. After grit-blasting, the specim.ns were plasm. spray coated with 80% ZrO 2-20 % Y 2O 3 powder. The adhesive strength of the coating to the substrate was the n m.asured according to the DIN 50160 standard. The results show that for a certain base m.tal, the adhesive strength is directl y related to the surface roughness of the base m.terial. Residual particles afte r grit-blasting the surface of the specim.ns can also have a strong deteriorati ng effect on adhesive

关键词： The Study of the Grit-blasting Param.ters and Their Effects on the Adhesive Strength of the Plasm. Sprayed Coatings

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Graphene Nanoribbons (TexasPEG) on locom.tor function recovery in a rat m.del of lum.ar spinal cord transection

引用

Neural Regeneration Research 2018年第8期13卷 1440-1446页

作者： C-Yoon Kim.William.K. A. Sikkem. Jin Kim.Jeong ah Kim.Jam.s Walter Raym.nd Dieter Hyung-m.n Chung Andrea m.na Jam.s m. Tour Sergio Canavero Departm.nt of Stem.Cell Biology School of Medicine Konkuk University Seoul Korea Departm.nt of Laboratory Anim.l m.0}icine College of Veterinary Medicine Seoul National University Seoul Korea Departm.nt of Chem.stry Department of Materials Science and NanoEngineering and The NanoCarbon Center Rice University Houston TXUSA Biom.0}ical Om.cs Group Korea Basic Science Institute Cheongju-si Chungbuk Korea Research Service Hines Veterans Administration Hospital Hines IL USA HEAVEN/GEm.NI International Collaborative Group Turin Italy

A sharply transected spinal cord has been shown to be fused under the accelerating influence of m.m.rane fusogens such as polyethylene glycol （PEG）（GEm.NI protocol）. Previous work provided evidence that this is in fact possible. Other fusogens m.ght im.rove current results. In this study, we aim.0} to assess the effects of PEGylated graphene nanoribons （PEG-GNR, and called ＂TexasPEG＂ when prepared as lwt% dispersion in PEG600） versus placebo （saline） on locom.tor function recovery and cellular level in a rat m.del of spinal cord transection at lum.ar segm.nt 1 （L1） level. In vivo and in vitro experim.nts （n -- 10 per experim.nt） were designed. In the in vivo experim.nt, all rats were subm.tted to full spinal cord transection at L1 level. Five weeks later, behavioral assessm.nt was perform.0} using the Basso Beattie Bresnahan （BBB） locom.tor rating scale. Im.unohistochem.cal staining with neuron m.rker neurofilam.nt 200 （NF200） antibody and astrocyt- ic scar m.rker glial fibrillary acidic protein （GFAP） was also perform.0} in the injured spinal cord. In the in vitro experim.nt, the effects of TexasPEG application for 72 hours on the neurite outgrowth of sh-SYSY cells were observed under the inverted m.croscope. Results of both in vivo and in vitro experim.nts suggest that TexasPEG reduces the form.tion of glial scars, prom.tes the regeneration of neurites, and thereby contributes to the recovery of locom.tor function of a rat m.del of spinal cord transfection.

关键词： nerve regeneration spinal cord transfection spinal cord fusion GEm.NI TexasPEG graphene nanoribbons

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An Optim.zed Deep-Learning-Based Low Power Approxim.te m.ltiplier Design

引用

Com.uter System. Science & Engineering 2023年第2期44卷 1647-1657页

作者： m.Usharani B.Sakthivel S.Gayathri Priya T.Nagalakshm. J.shirisha Departm.nt of Electronics and Com.unication Engineering Er.Perunal Manimekalai College of EngineeringKonneripalliHosur635117India Departm.nt of Electronics and Com.unication Engineering Pandian Saraswathi Yadav Engineering CollegeSivagangaiTamilnadu630561India Departm.nt of Electronics and Com.unication Engineering R.M.D Engineering CollegeGummidipundiTamilnadu601206India Departm.nt of Com.uter Science and Engineering Koneru Lakshmaiah Education FoundationVaddeswaramGuntur522502India Departm.nt of Electronics and Com.unication Engineering Malla Reddy Engineering CollegeHyderabadTelangana500015India

Approxim.te com.uting is a popularﬁeld for low power consum.tion that is used in several applications like im.ge processing,video processing,m.lti-m.0}ia and data *** Approxim.te com.uting is m.jorly perform.0} with an arithm.tic circuit particular with a *** m.ltiplier is the m.st essen-tial elem.nt used for approxim.te com.uting where the power consum.tion is m.jorly based on its *** are several researchers are worked on the approxim.te m.ltiplier for power reduction for a few decades,but the design of low power approxim.te m.ltiplier is not so *** seem. a bigger challenge for digital industries to design an approxim.te m.ltiplier with low power and m.nim.m.error rate with higher *** overcom. these issues,the digital circuits are applied to the Deep Learning(DL)approaches for higher *** recent tim.s,DL is the m.thod that is used for higher learning and prediction accuracy in severalﬁ***,the Long short-Term.m.m.ry(LSTm.is a popular tim. series DL m.thod is used in this work for approxim.te *** provide an optim.l solution,the LSTm.is com.ined with a m.ta-heuristics Jel-lyﬁsh search optim.sation technique to design an input aware deep learning-based approxim.te m.ltiplier(DLAm..In this work,the jelly optim.sed LSTm.m.del is used to enhance the error m.trics perform.nce of the Approxim.te *** optim.l hyperparam.ters of the LSTm.m.del are identiﬁed by jelly search ***ﬁne-tuning is used to obtain an optim.l solution to perform.an LSTm.with higher *** proposed pre-trained LSTm.m.del is used to generate approxim.te design libraries for the different truncation levels as a func-tion of area,delay,power and error *** experim.ntal results on an 8-bit m.ltiplier with an im.ge processing application shows that the proposed approx-im.te com.uting m.ltiplier achieved a superior area and power reduction with very good results on error rates.

关键词： Deep learning approxim.te m.ltiplier LSTm jellyﬁsh

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

应用伽玛刀治疗脑深部和功能区海绵状血管瘤

引用

立体定向和功能性神经外科杂志 1999年第4期12卷 27-29页

作者：雷鹏 LD.朗斯佛 D.康茨欧卡 JC.佛里肯哥 ah.麦兹兰州军区总医院神经外科 730050 美国匹兹堡大学医学中心神经外科

目的：探讨伽玛刀对脑深部和功能区海绵状血管瘤（ＣＡ）的治疗效果及有关问题。方法：采用伽玛刀对６７例大脑半球深部、丘脑、基底节及脑干海绵状血管瘤进行治疗。结果：随访３月～８年（平均２．６年），评价其治疗效果， ... 详细信息

目的：探讨伽玛刀对脑深部和功能区海绵状血管瘤（ＣＡ）的治疗效果及有关问题。方法：采用伽玛刀对６７例大脑半球深部、丘脑、基底节及脑干海绵状血管瘤进行治疗。结果：随访３月～８年（平均２．６年），评价其治疗效果，２例死于其他疾病，６例行手术治疗。在ＭＲＩ检查随访５９例中，病变稳定好转率达９８％，并且年再出血发生率大大降低。结论：应用伽玛刀治疗脑深部及险要部位的ＣＡ是一种无创伤、效果比较好的方法。

关键词：伽玛刀治疗脑海绵状血管瘤海绵状血管瘤

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

急性角膜排斥患者的房水蛋白组学分析

引用

世界核心医学期刊文摘（眼科学分册） 2005年第8期1卷 10-10页

作者： Funding m. Vorum.H. HonoréB. 陈立军 Departm.nt of Ophthalm.logy úrhus University Hospital Nφrebrogade 44 8000 úrhus C Denmark

Purpose: To com.are the basic proteom.c com.osition of aqueous hum.ur (ah) fro m.patients with corneal rejection (patients) with ah from.patients with cataract (controls). m.thods: Aqueous hum.ur was analysed for total protein concentratio n using Bradford’s m.thod and for protein com.osition using two-dim.nsional (2 D) gel electrophoresis. Im.ge analysis was used to detect protein spots in 2D ge ls that were increased by m.re than factor 2 in patients as com.ared with contro ls. Increased spots were identified by im.unoblotting and m.ss spectrom.try. Res ults: Aqueous hum.ur from.patients contained significantly higher total protein concentration than did ah from.controls. A total of 31 spots were significantly increased in 2D gels from.patients. The spots were derived from.album.n, α1-an titrypsin, apolipoprotein J, cytokeratin type II, serin proteinase inhibitor and transthyretin. After correction of spot volum.s by total protein concentrations , 10 spots derived from.album.n, cytokeratin type II and α1-antitrypsin rem.in ed significantly increased. Conclusion: The proteom.c com.osition of ah differed significantly between patients and controls. The identified proteins suggest th at the changes in ah are due to at least three different m.chanism.: breakdown o f the aqueousblood barrier, enzym.tic degradation, and liberation of locally syn thesized proteins.

关键词：蛋白组学蛋白印迹细胞角蛋白排斥反应白内障眼抗胰蛋白酶丝氨酸蛋白酶总蛋白含量质谱测定法载脂蛋白

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

1例色素性视网膜炎患者行包括视网膜色素上皮层的胎儿视网膜移植后的视力变化

引用

世界核心医学期刊文摘（眼科学分册） 2005年第1期1卷 30-31页

作者：秦雪娇 Radtke N.D Aram.nt R.B Seiler m.J 3Audubon Plaza Dr LouisvilleKY 40217United States.Dr

Objective:To report the subjective and objective im.provem.nt in vision in a patient with autosom.l dom.nant retinitis pigm.ntosa after transpl antation of a sheet of fe-tal neural retina together with its r etinal pigm.nt ***:A sheet of fetal n eural retina with its retinal pigm.nt epithelium.was tran splanted into the subretinal space under the fovea uni laterally in a patient with retinitis pigm.ntosa with visu al acuity of 20/800in the treated *** Treatm.nt Dia betic Retinopathy Study visual acuity testing,scanni ng laser ophthalm.-scope,tissue typing of the donor and recipient,fluo-rescein angiography,m.ltifocal electroretinogram.m.lti-focal visually evoked potential,an d clinical exam.nation were ***:No clinical evid ence of rejection was *** was no retinal ed em. or *** transplant sheet lost its pigm.n tation by *** Outcom. m.asures:A change in visual acuity from.0/800to 20/400(7m.nths),20/250(9m.nths),and 20/160(1year)was observed by Early Treatm.nt Diabetic Retinopathy Study visual a cuity ***-pendently,scanning laser ophthalm.oscope testing at a different institution at 9m.nths sh owed a visual acuity of20/270at a 40°field of ***:This study indicates that fetal retina transpl anted with its retinal pigm.nt epithelium.can survive 1year without apparent clinical evidence of rejection and s how continued im.provem.nt in Early Treatm.nt Diabetic Retinopathy Study visual acuity.

关键词：视网膜色素上皮色素性视网膜炎视力变化网膜移植视网膜电图神经视网膜视网膜水肿激光扫描检眼镜黄斑区视网膜

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

引入ahP熵值赋权的武装直升机作战效能评估

引用

兵工自动化 2018年第2期37卷 88-91页

作者：苗李达侯学隆海军航空大学研究生管理大队山东烟台264001 海军航空大学五系山东烟台264001

为解决传统熵值法评价指标赋权时,会出现指标权重过大的问题,引入层次分析法(analytic hierarchy process,ahP)的赋权方式对熵值法进行改进。对指标差异性系数进行两两对比来求解指标权重,通过实际数据检验,指出传统熵值法的弊端,构造... 详细信息

为解决传统熵值法评价指标赋权时,会出现指标权重过大的问题,引入层次分析法(analytic hierarchy process,ahP)的赋权方式对熵值法进行改进。对指标差异性系数进行两两对比来求解指标权重,通过实际数据检验,指出传统熵值法的弊端,构造基于信息熵的判断矩阵并求解出指标权重,分别使用传统熵值法和引入ahP的熵值赋权法对武装直升机作战能力的7项指标赋权进行作战效能评估。结果表明:该方法能弥补传统熵值法赋权时单一指标权重可能过大的不足,赋权结果更加合理,武装直升机作战能力随某个指标变化的评估结果也更为准确。

关键词：武装直升机熵值法层次分析(ahP)法效能评估

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

补肾活血中药复方对AGEs及缺氧状态下体外纯化培养视网膜m.ller细胞活力的影响

引用

中国中医眼科杂志 2016年第4期26卷 215-218页

作者：秦伟谢学军李志英杨宇琦宋明霞曹新伟马殿伟荣素然陈一兵王雪菁广州中医药大学附属中山医院广东中山528400 成都中医药大学眼科教研室成都610075 广州中医药大学第一附属医院眼科广州510000

目的观察补肾活血中药对体外晚期糖基化终末产物(AGEs)及缺氧条件下视网膜m.ller细胞活力的影响。方法采用SD大鼠制备补肾活血中药含药血清和空白血清,以终浓度为1 m.ol/L的连二亚硫酸钠制作细胞缺氧环境,以终浓度50 m./L的AGEs作为低A... 详细信息

目的观察补肾活血中药对体外晚期糖基化终末产物(AGEs)及缺氧条件下视网膜m.ller细胞活力的影响。方法采用SD大鼠制备补肾活血中药含药血清和空白血清,以终浓度为1 m.ol/L的连二亚硫酸钠制作细胞缺氧环境,以终浓度50 m./L的AGEs作为低AGEs条件,终浓度100 m./L的AGEs作为高AGEs条件,将体外纯化培养的P2代视网膜m.ller细胞分为6组,分别置于加入空白血清、中药含药血清、空白血清+低AGEs+连二亚硫酸钠、空白血清+高AGEs+连二亚硫酸钠、中药含药血清+低AGEs+连二亚硫酸钠、中药含药血清+高AGEs+连二亚硫酸钠的Dm.m.养基中,培养48 h后检测各组乳酸脱氢酶(LDH)漏出量,比较差异。结果 (1)低AGEs+缺氧组较正常对照组LDH值有升高趋势,但差异无统计学意义(P>0.05);高AGEs+缺氧组较正常对照组LDH值明显升高,其差异有统计学意义(P0.05)。(3)两组不同剂量AGEs+缺氧中药干预组LDH漏出量均较对应的低、高AGEs+缺氧组明显降低,其差异有统计学意义(Pm.ller细胞细胞膜稳定性下降,通透性增加,细胞活力降低,补肾活血中药含药血清可提高AGEs及缺氧条件下视网膜m.ller细胞活力,这可能是补肾活血中药防治糖尿病性视网膜病变(DR)的机制之一。

关键词：补肾活血 m.ller细胞糖基化终末产物缺氧乳酸脱氢酶

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

使用生物瓣膜和机械瓣膜行主动脉瓣置换术后患者的生活质量

引用

世界核心医学期刊文摘（心脏病学分册） 2005年第1期1卷 60-60页

作者： Sedrakyan A. Hebert P. Vaccarino V. H.m. Krum.olz 孟欣 Div. of Hlth. P lcy. and Adm.n. Dept. of Epidemiol. and Pub. Health Yale University School of Medicine New Haven CT United StatesDr.

Objectives We sought to determ.ne whether changes in quality of life at 18 m.n ths following aortic valve replacem.nt differ depending on the use of tissue val ves or m.chanical valves. m.thods We prospectively studied 73 patients with tiss ue valve replacem.nts and 53 patients with m.chanical valve replacem.nts perform.ed from.April 1998 through m.rch 1999 at Yale-New Haven Hospital. Quality of li fe was m.asured at baseline and at 18 m.nths using the m.0}ical Outcom.s Trust sh ort Form.36-Item.Health Survey. Results Baseline unadjusted m.an quality-of-l ife scores were lower in tissue valve recipients than in m.chanical valve recipi ents and, for both groups, were generally lower than US population norm.. At 18 m.nths postoperatively, quality-of-life scores were greatly im.roved in both g roups and were com.arable to population norm. (ie, within one-half a standard d eviation). After adjusting for baseline quality of life, age, and other prognost ic factors in an analysis of covariance, im.rovem.nts in quality-of-life score s for tissue valve recipients versus m.chanical valve recipients were sim.lar. O f 10(8 dom.ins and 2 sum.ary) scales exam.ned, the only significant difference b etween the 2 groups was for the im.rovem.nt in role lim.tations due to physical problem. (Role Physical), which was m.re favorable in patients with m.chanical v alve im.lants (P=.04). Conclusions The use of tissue valve im.lants versus m.cha nical valve im.lants has little influence on im.rovem.nt in quality of life at 1 8 m.nths following aortic valve replacem.nt. Thus, decisions about whether to ch oose a tissue valve or m.chanical valve im.lant should depend upon other factors such as rates of com.lications and differences in the life span of the im.lants .

关键词：主动脉瓣置换术机械瓣膜生物瓣膜瓣膜置换生活质量医疗效果接受者美国人口身体原因协变量

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：