发布求助
文献互助 智能选刊 最新文献

Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation最新文献

筛选
英文 中文
Console for the rapid and precise comparison of volt boxes 控制台的快速和精确的比较伏特箱
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-07-01 DOI: 10.6028/JRES.070C.017
Patrick H. Lowrie
{"title":"Console for the rapid and precise comparison of volt boxes","authors":"Patrick H. Lowrie","doi":"10.6028/JRES.070C.017","DOIUrl":"https://doi.org/10.6028/JRES.070C.017","url":null,"abstract":"The compari so n of vo lt boxes within uncertainties of±O.Ol percent or less has, in the I)as t, bee n a long and difficult task at the NBS Boulde r Laboratories. A console for thi s purpose rece ntl y put in use has reduced the time and labor to a great extent and, at the same time, has reduced the unce rt a in · ties associated with the measureme nt c ircuitry to less than 0.001 pe rcent, thu s a llow ing rea li zab le calibrat ion uncertainties of less than 0.005 pe rcent. The console was des igned as part of a s ys te m in which the operator was considered to be the decis ion-makin g link in th e meas ure me nt cha in . The circui try, through the use of a contained comput e r and associa ted c ircu it s , provid es the ope rator with the data h e requires in the form he chooses. The operato r is thu s freed from the need to co nside r minutiae, and there by is ab le to co ncentrate on those fac tors requiring judgment.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124447076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Some harmonic properties of an oscillating Fabry-Perot inteferometer 振荡法布里-珀罗干涉仪的一些谐波特性
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-07-01 DOI: 10.6028/JRES.070C.014
M. Gadsden, H. M. Williams
{"title":"Some harmonic properties of an oscillating Fabry-Perot inteferometer","authors":"M. Gadsden, H. M. Williams","doi":"10.6028/JRES.070C.014","DOIUrl":"https://doi.org/10.6028/JRES.070C.014","url":null,"abstract":"The trans miss ion of a spec tral line through an air spaced Fabry.Pe rut inte rfe rome te r is consid e red. The ha rmoni c components of the tran smiss ion whe n the s pac ing of th e inte rfe rom ete r is osc ill a ted are disc ussed and it is found that the compone nts can be used in a servocontrol system to offset drifts in th e o ptical thic kness 01 the int e rfe rom ete r. A possible use of such a co ntrolled sys tem in observations o f the nig ht a irglow is di scussed .","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128001182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Corrosion rates of binary alloys of nickel and iron measured by polarization methods 用极化法测定镍铁二元合金的腐蚀速率
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-07-01 DOI: 10.6028/JRES.070C.018
W. Schwerdtfeger
{"title":"Corrosion rates of binary alloys of nickel and iron measured by polarization methods","authors":"W. Schwerdtfeger","doi":"10.6028/JRES.070C.018","DOIUrl":"https://doi.org/10.6028/JRES.070C.018","url":null,"abstract":"Specimens of ten binary alloys of nickel and iron containing 3, 5, 10, 16, 20,30,36,50 ,57, and 81 percent Ni and of the metals nic kel and iron were immersed for 7 months in 265 gallons of c ity water to which had been added 3 percent by weight of sodium chloride. Cathodic and anodic polarization curves of the specimens were obtained at about 22 periodic intervals throughout the exposure period. Corrosion currents, calculated from curre nts at break s in the curves, were converted to corrosion rates e xpressed as weight losses by applying Farad ay's law. The calculated weight losses were in reasonable agreement with the actual we ight losses. The polarization rates, /lV/M , of the spec ime ns calc ulated from ca thodic polarization curves (cathodic control pre vailed) at several intervals throughout the ex pos ure period were plotted on logarithmic coordinates with respec t to the corrosion curre nt de ns ities calculated from breaks in the same curves . S imilarly, the ave rages of these /lV/M valu es we re also plotted on logarithmic coordinates versus the actua l corrosion rates ex pressed as weight losses. Both plots conformed to the theoretical slope of 1.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128364310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Precise reflection coefficient measurements with an untuned reflectometer 用非调谐反射计精确测量反射系数
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-07-01 DOI: 10.6028/JRES.070C.015
W. E. Little, D. Ellerbruch
{"title":"Precise reflection coefficient measurements with an untuned reflectometer","authors":"W. E. Little, D. Ellerbruch","doi":"10.6028/JRES.070C.015","DOIUrl":"https://doi.org/10.6028/JRES.070C.015","url":null,"abstract":"The precis ion tuned . re flecto~ e t e r tec hnique of re fl ec tion coe ffi c ienl meas ure me nt is , a t present , t.he .mos t accurate technIqu e avadable. Utd ,za t,on of the tec hniqu e requi res the IJ se o f tune rs and s hdlng te rnllnat lon s to ehmlllate or reduce the inhe rent e rrors of a direc tional coupl er. Th,s paper desc l'lbes a reAec tlOn coe ffi c Ie nt mea surement technique Ihat ap proac hes Ih e acc uracy of the tuned reHectomete r. Ins tead of tune rs, the tec hnique uses a n idea l one-qu arl e r wavele ngth wavegUId e sec tIOn to ehmlllate the measure me nt e rror Int rodu ced by finite direc ti onal coup le r directI vIty and to reduce to second orde r the e rror Introdu ced by an equiva le nt gene ra tor mis matc h. A co mpari so n of the quarte r-wave techniqu e with the lun ed re Aectome ter technique through I he ~eas ure m e nt of the reAec tlOn coeffi CIe nt of three 9/16 inch coaxia l waveguid e te rmina l io ns is a lso lnc lude d. .","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"16 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114116268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
A versatile ratio instrument for the high ratio comparison of voltage or resistance 用于电压或电阻的高比率比较的通用比率仪器
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-07-01 DOI: 10.6028/JRES.070C.016
A. Hess
{"title":"A versatile ratio instrument for the high ratio comparison of voltage or resistance","authors":"A. Hess","doi":"10.6028/JRES.070C.016","DOIUrl":"https://doi.org/10.6028/JRES.070C.016","url":null,"abstract":"A 9-dial resistance ratio instrument capable of precise high ratio comparison of voltage or resistance (from 1/1 to 107/1) is describe d. Also described is the modifi cation of a 6-dial unive rsa l ratio se t to permit its additiona l use as a ve rs ati le ratio instrument. Paramount to the accuracy of these high ratio in s trum e nt s is the carefully adju sted \"common point\" junction whic h is brie Ry discussed .","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131375232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The effect of cold-drawing on the creep behavior of a nickel-4.2 percent aluminum alloy 冷拔对镍- 4.2%铝合金蠕变行为的影响
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-07-01 DOI: 10.6028/jres.070c.019
W. D. Jenkins, W. Willard
{"title":"The effect of cold-drawing on the creep behavior of a nickel-4.2 percent aluminum alloy","authors":"W. D. Jenkins, W. Willard","doi":"10.6028/jres.070c.019","DOIUrl":"https://doi.org/10.6028/jres.070c.019","url":null,"abstract":"Creep tests were made at 700, 900, and 1200 of (644, 755, and 92] OK) on a nickelA.2 percent aluminum al loy (Duranickel) initially as cold-drawn and as cold-drawn and age-hardened. Micro structural changes occurring during creep are correlated with the Row, fracture, and ductility of the specimens. Light and electron microscope observations indicate that increases in creep strength were associated with the formation of rather straight discontinuous slip bands, a well defined subgrain s tructure, small precipitates of Ni\"AI, and a general distribution of these precipitates throughout the grains. Creep strength at 1200 OF was relatively unaffected by prior cold-drawing or aging_ [nter crystalline cracking, accompanied by low ductility, was evident at 900 and 1200 OF and slow creep rates; whereas transcrystalline cracking and high ductilit y values were observed at 700 OF.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121617843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ellipsoidal mirror reflectometer. 椭球镜反射计。
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-06-01 DOI: 10.6028/JRES.070C.009
S. Dunn, J. Richmond, J. Wiebelt
{"title":"Ellipsoidal mirror reflectometer.","authors":"S. Dunn, J. Richmond, J. Wiebelt","doi":"10.6028/JRES.070C.009","DOIUrl":"https://doi.org/10.6028/JRES.070C.009","url":null,"abstract":"","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121089551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
A note on the numerical evaluation of thermal radiation characteristics of diffuse cylindrical and conical cavities 漫射圆柱腔和锥形腔热辐射特性的数值计算注记
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-04-01 DOI: 10.6028/JRES.070C.012
B. Peavy
{"title":"A note on the numerical evaluation of thermal radiation characteristics of diffuse cylindrical and conical cavities","authors":"B. Peavy","doi":"10.6028/JRES.070C.012","DOIUrl":"https://doi.org/10.6028/JRES.070C.012","url":null,"abstract":"Presented a re methods that avoid the need to em ploy an extrapolation technique in the region of the criti ca l points for evaluation of the apparent e mmissivity of diffuse cylindrical and conical cavities. The methods involve appropriate s ubstitutions in the integrands of integral equations that are used in a nalytical so lut ions for determ ining the therm al radiation characteri sti cs of diffuse and conical cavi ti es. Equations for ei ther iso thermal or noni sothermal surface temperature conditions are provided in a direc t fo rm for computations. N ume rical results are presented for a general linear tem pera ture d is tribution along the length of a cylindrica l cavity. T he method is equally app licable for the solut ion of othe r problems in integral eq uations where discont inuiti es are e ncountered.","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115569093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Coaxial power meter calibration using a waveguide standard 同轴功率计校准使用波导标准
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-04-01 DOI: 10.6028/JRES.070C.011
G. Engen
{"title":"Coaxial power meter calibration using a waveguide standard","authors":"G. Engen","doi":"10.6028/JRES.070C.011","DOIUrl":"https://doi.org/10.6028/JRES.070C.011","url":null,"abstract":"","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132610305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Testing of lenses with the wave front reversing interferometer 用波前反转干涉仪测试透镜
Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation Pub Date : 1966-04-01 DOI: 10.6028/JRES.070C.008
K. Muraoka
{"title":"Testing of lenses with the wave front reversing interferometer","authors":"K. Muraoka","doi":"10.6028/JRES.070C.008","DOIUrl":"https://doi.org/10.6028/JRES.070C.008","url":null,"abstract":"The da ta ob tain ed with a reve rs ing inte rferomete r ma y be a ppli ed 0 th e optical path diffe re n(;e equation fo r eva lu a tin g the a be rra ti on cons tants of a le ns. Thi s pa pe r gives the d e ve lop me nt of op ti cal path diffe re nce e quation s fo r th e revers ing int er fero me te r. Th ese eq uations a re a pplied to r es ult s obta ined with two le nses and a co mpa ri son is made of values from th e inte rfe romete r, geometrical measure me nts. and theo re ti cal co mputation. The inte rfe rom e te r is a lso app li ed to the meas ure me nt of c hrom ati c a be rra ti on. So me data are in c lud ed fo r co mpariso n of the int e rferome te r res ults with th ose ob ta ined by o the r method s. The adva ntages of the wave fro nt revers ing int e rfe ro mete r over the T wyma n int e rfe rome ter are (a) it ca n be adj us ted to s how th e effec ts e ith er of s ph e ri ca l abe rra ti on or coma separat e ly a nd ind e· pende ntl y of as ti gm a ti s m e ve n tho ugh they a ll ex is t toge the r : (b) th e s ize of t he revers ing int e rfe r· ome te r e le me nt is independe nt of the s ize of the lens to be te s te d ; (c) th e a djus tm e nts are eas ie r than those of the Twyman type; a nd (d) the fringes are less vulne rabl e to vib ra ti on e ffec ts than mos t othe r inte rferome ters .","PeriodicalId":367668,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section C: Engineering and Instrumentation","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1966-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122961354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书