A fast three-step path planning algorithm was proposed for automatic optic system to inspect electronic product defects by using surface mount technology. 针对检测表面贴片产品缺陷的光学检测系统,提出一种三阶段的快速路径规划算法。
Electronic components surface defects detecting technology based on image processing 基于图像处理的电子元器件表面缺陷检测技术
Theoretical Investigations on Structure, Electronic Properties, and Gas Adsorption of BN Nanotube with Vacancy Defects or Doped Defects 缺陷、掺杂氮化硼纳米管的结构、电子性质及其表面气体吸附行为的理论研究
The electronic structure and transport properties of graphene nanoribbons with divacancies defects 双空位缺陷石墨纳米带的电子结构和输运性质研究
Expounds some problems to have to regard highly and need to solve in electronic data processing accounting in our country, points out existent defects of electronic data processing accounting, analyses the reasons and puts forward the countermeasures. 阐述了当前我国会计电算化过程中必须重视和需要解决的几个问题,指出了会计电算化存在的缺陷,并分析了原因,提出了对策。
Objective To study the countermeasure improving electronic medical record quality after analyzing the causes of defects in the electronic medical records. 目的通过对病历质量缺陷及其成因的分析,探讨提高病历质量的对策措施。
The conceptions of coating, painting technology and coating's preventing theory were presented. The selection of coating, painting technology and the coating's quality testing of military electronic equipment were discussed. Finally, the common defects and its causes were analyzed in detail. 阐述了涂料、涂装工艺的概念以及涂层的防护机理,详细讨论了军用电子设备表面涂覆涂料的选用、涂装工艺和涂层质量检验问题,分析了涂层的常见缺陷及其成因。
At present, DPA has not been fully applied, which severely limit the quality improvement of electronic components in domestic, especially civil electronic components have more or less covert quality defects generally. 但目前国内没有充分应用此技术,严重的限制了国内电子元器件质量的提高,尤其是民用电子元器件普遍存在或多或少的隐蔽的质量缺陷。
Electronic speckle pattern interferometry ( ESPI) and shear electronic speckle pattern interferometry ( SESPI) have been used to evaluate on site seam weld defects of a rotating shell and spherical pressure vessels. The experimental results and theory analyses are given. 本文用电子散斑干涉及剪切电子散斑干涉技术(ESPI/SESPI)实现了薄壁旋转壳及球形压力容器焊缝缺陷的现场实时检测,给出了实际压力容器焊缝缺陷的无损检测结果与理论分析;
Within the framework of effective-mass approximation, the properties of the localized electronic states in a N-layer superlattice ( SL) with structural defects in finite magnetic fields are investigated by utilizing the transfer matrix and effective barrier-height methods. 在有效质量近似理论下,利用转移矩阵和有效垒高方法研究了有限磁场下含结构缺陷的多组分超晶格中局域电子态的性质。
Electronic properties of single carbon nanotubes with two pentagon-heptagon pairs defects 含有2个五边形七边形缺陷对的单壁碳纳米管的电学性能
Simulation of Electronic Structures of CuI Crystal and Its Point Defects CuI晶体及其缺陷态电子结构的模拟
Effects of the electronic structure of ZnO and its defects on the spectral properties ZnO及其缺陷电子结构对光谱特性的影响
Electronic structure of intrinsic defects and mechanism of donor-acceptor pair luminescence in CuI crystal CuI晶体缺陷态电子结构及其施主-受主对发光机理的研究
This paper introduces the performances demands and the development of potting materials using in electronic equipment, and the sorts of potting materials. Analyzing the defects of the traditional potting materials, the goal and meaning of researching the insulating heat conduction materials are clear. 本文介绍了灌封材料在电子器件封装中的作用、国内外的灌封材料的种类,指出了传统灌封材料的不足,及研制绝缘导热灌封材料的重要意义。
This paper studied process of sintering in doped Y_2O_3 ZnO conductive ceramics by means of positron annihilation technique. It has been discussed that effect of sintering temperature on conductive characteristics, local electronic density and structrual defects. 应用正电子湮没技术,对掺杂Y2O3的ZnO导电陶瓷烧结过程进行了研究,给出了烧结温度对导电特性、局域电子密度、结构缺陷的影响特征。
The localized electronic states and transmission spectra in N-layer superlattice with structural defects in finite magnetic fields 磁场下含结构缺陷多组分超晶格中的局域电子态和电子输运
Calculation of Electronic Structures of Er Point Defects and Er O Complex Defects in Crystal Silicon with EHMO 单晶硅中铒点缺陷及Er-O复合缺陷电子结构的EHMO计算
Following the improvement of electronic information technology, the son-system removes a series of defects with is optimized progressively. 伴随着电子信息技术的进步,三代远程教育系统的信息控制子系统消除一系列缺陷而逐步优化。
The structural and electronic properties of single vacancies and related point defects in achiral carbon nanotubes are studied based on a tight-binding model. 文章在紧束缚势模型基础上系统地研究了非手性单壁碳纳米管上单原子空位缺陷结构和电子结构性质。
If common management mode of electronic records is applied to electronic records in minority languages, they will facing many challenges and major defects, such us the risk of long-term preservation, conflicts of coding and culture, barriers of understanding and access, and overall low efficiency. 按照通用模式进行少数民族语言电子文件管理,面临长期可读风险、编码冲突、文化冲突、理解障碍、获取障碍、整体低效等重大缺陷。
This design not only solves the problem of electronic scale defects, but also greatly improves the work efficiency. 本设计不仅解决了目前电子秤的弊端,而且还大幅度的提高工作效率。
Positron Annihilation Technique is a sensitive probe to the electronic structure and defects of the solid materials, and it plays a special role in condensed matter physics, materials science and other fields. 正电子湮灭技术是固体材料电子结构和缺陷的敏感探针,在凝聚态物理、材料科学等领域有着特殊的作用。
An important reason of Electronic product quality defects is the solder paste printing defects when Surface Mounted. 而引起电子产品质量缺陷的一个重要原因就是贴片安装时锡膏印刷的缺陷。
Meanwhile, based on the analysis of the Secure Electronic Transaction ( SET), the author points the defects of the agreement, and proposes some improvements. 同时,在分析了安全电子交易协议(SET)的理论基础之上,提出了该协议存在的缺陷,并且提出了改进方案。
When the alternative elements rip into solid material, it will take up the specific position, and influence the material structure, electronic behavior and defects. 替代元素进入固体物质后,都会占据特定的位置,对固体物质的结构、电子行为、缺陷等产生影响。
This thesis deals with the electronic structure and their appilications of carbon nanotubes and Fullerenes with defects by using density functional theory based on the first-principles method. 本论文以碳纳米管、富勒烯为研究对象,采用第一性原理方法计算了缺态碳纳米结构的电子性质及其应用。
With the rapid development of electronic manufacturing industry in our country, PCB circuit defects detection is particularly important in order to improve the Printed Circuit Board ( PCB) quality and reduce the cost of production. 随着我国电子制造业的迅猛发展,为了提高印刷电路板(PCB)的质量和降低其生产成本,对PCB电路的缺陷检测显得尤为重要。