共查询到20条相似文献,搜索用时 46 毫秒
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本文介绍一种新的温度计自动检定系统模型 ,将计量管理一体化在温度计自动检定中的应用 ,使得自动检定系统可以与企业数据库联系起来 相似文献
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运用VC开发环境和Microsoft Access数据库技术设计了一套实用的一等标准玻璃量器检定数据处理自动化系统,该系统实现了11个功能模块:基本信息输入、水温、各检定点称量值等关键数据输入、自动搜索一等标准玻璃量器检定规程数据库、添加到数据库、保存修改、信息显示、信息编辑、信息删除、自动生成原始记录、检定证书、结果通知书。完成了一等标准玻璃量器检定规程数据库的建立和维护,以及前端应用程序的开发,并对系统软件的结构及主要功能进行了详细分析。 相似文献
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介绍了一种钟罩式气体流量标准装置自动检定系统.系统在现有钟罩装置的基础上,增加了由单片机与上位机组成的二级系统,实现了检定过程的自动控制与数据采集,并且将检定结果存入数据库,便于对检定数据进行管理.该自动检定系统的实现,对于提高气体流量仪表检定的效率和准确度具有实际意义. 相似文献
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指针式电学三表自动检定系统研制 总被引:1,自引:0,他引:1
针对指针式电学三表无法实现全自动检定这一问题,该文设计并实现一套电学三表自动检定系统,通过一系列自动控制机制实现自动检定的硬件控制需求,提出应用帧间差值剪影法、Hough变换以及阈值逐次逼近法实现的实时动态指针识别算法,将指针信息转换为角度的方法可以满足准确快速的实时指针识别需求。建立的自动检定系统可以代替传统的检定方式,建立数据库以及数据处理系统用于数据的处理,整体实现指针式仪表的全自动检定,系统测试的综合误差优于0.03%。 相似文献
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一、强制性产品认证制度简介强制性产品认证制度,是各国政府为保护广大消费者人身和动植物生命安全,保护环境、保护国家安全,依照法律法规实施的一种产品合格评定制度,它要求产品必须符合国家标准和技术法规。强制性产品认证, 相似文献
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It is shown that user-oriented software plays an important role in the design of sensor systems. Justification is provided for functional modules that make it possible to introduce instrumentation support and application shells into the sphere of metrological practice.Translated from Izmeritel'naya Tekhnika, No. 11, pp. 13–16, November, 1995. 相似文献
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用MOCVD方法生长了n+-InP/n-InP/SI-InP材料,以HfO2为介质膜,用电子束蒸发和选择化学腐蚀研制成栅宽0.002mm、栅长为0.2mm的具有蘑菇状栅极结构的InPMISFET.直流特性测量表明,跨导gm=80-115ms/mm,开启电压VT-3.62V,沟道的有效电子迁移率ueff=674cm2/V·S,界面态密度NSS=9.56×1011cm-2.设计计算的特征频率fT=97.1GHz,最高特征频率fmax=64.7GHz,尚未发现器件性能的漂移现象.本器件可作为InP基的单片光电子集成器件(OEIC)的放大部分. 相似文献
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文章总结了多联式分体空调机的安装工艺,并详细的介绍了试压、抽真空及充冷媒的施工方法和调试、试运转的注意事项等. 相似文献
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Concepts for textile reinforcements for timber structures 总被引:1,自引:0,他引:1
P. Haller 《Materials and Structures》2007,40(1):107-118
This paper presents general remarks on the development of timber structures as a result of technological changes. It discusses
drawbacks of wood with respect to structural application. Shear and transversal strengths are very low due to the anisotropy
of wood. Various techniques are applicable to cope with this drawback. This paper presents the reinforcement by means of tailor
made textiles as comprehensive technology to deal with this kind of difficulties in many design situations. Particular importance
is attached to the material productivity during the transformation of raw wood into structural cross sections. It is shown
that cut offs in the sawmill and the predominating full section lead to a poor use of the material compared to technical profiles.
A new understanding of the wood as a cellular solid is presented that allows a thermo-hygro-mechanical forming of cross sections
from solid wood panels.
Résumé Cet article présente des considérations générales sur l’évolution de constructions en bois en␣relation avec les changements technologiques. Il␣discute les inconvénients de l’utilisation structurale du bois. Vu l’anisotropie du matériau, la résistance au cisaillement et celle perpendiculaire aux fibres sont très faibles. Diverses techniques ont été proposées dans le passé pour pallier ces inconvénients. Les renforcements textiles sur mesure sont présentés comme technologie universelle permettant de surmonter ces difficultés dans la construction. Un accent particulier est mis sur la productivité du matériau à l’égard de la transformation de la grume dans une section portante. Il est démontré que les déchets dans la scierie ainsi que les sections solides mènent à une mauvaise exploitation du matériau bois comparée à celle des profilés métalliques et plastiques. Une nouvelle conception du bois comme solide cellulaire est présentée∼; elle permet un formage thermo-hygro-mécanique des sections tubulaires à partir des panneaux de bois massifs.相似文献
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2007年第8号(总第27号)No.008-2007(No.027intotal)中国标准化协会批准以下标协标准,现予公告。CAS156-2007标准电子签名系统应用规范第1部分:IE应用接口 相似文献
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Conclusion With the research byLong, Allison andMcGinnis, Cole andCole, an-Garfield an initial understanding of the consequences of multiple authorship for empirical studies of science is emerging.9 It is too early to suggest, asLong andMcGinnis do, that indices which disgegard multiple authorship are without serious short-comings. The best advise would be to use measures which take multiple authorship into account, compare them with others that do not, and examine any differences that might emerge. At least for the data will which I have worked, multiple authorship makes a considerable difference. Although little difference is found with the data collected by long and his colleagues when examined within an unclear regression analysis framework, it would seem premature to recommend unadjusted counts. The best advice to the prospective researcher would be to collect complete information on the number of authors for all published work and all citations assuming that difference between adjusted and unadjusted counts will emerge and be comfortable with the knowledge that if it does, the measures used can properly treat the data.The major point I made earlier, that the failure to adjust for multiple authorship is the most serious error in empirical judgment made in the sociology of science, emerges more forcefully. The error will require substantial redevelopment of previous empirical literature constructed with these faulty measures.Finally, the point should not be lost that the most serious problem remains and that is the validity of the paper model of science with examines article and citation counts to understand this complex dynamic project of human inquiry.10 相似文献