共查询到19条相似文献,搜索用时 46 毫秒
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GT/CAD/CAPP/PDM/EPR系统集成研究 总被引:3,自引:0,他引:3
研究ETO生产方式下以成组技术为基础的CAD/CAPP/PDM/ERP的集成方法,包括面向CAD/CAPP/PDM/ERP的集成的成组信息编码,基于成组编码原CAD/PDM集成、CAPP/PDM集成和PDM。ERP集成。提出了基于成组技术的CAD/CAPP/PDM/ERP集成框架,研究了贯穿于CAD、CAPP、PDM与ERP系统的统一的成组编码方案和信息编码方案。 相似文献
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CAD/CAPP/PDM/ERP系统是企业信息集成的重要组成部分,是集成的关键技术之一.本文针对企业信息化现状和存在的问题,介绍了CAD/CAPP/PDM/ERP系统的概念,提出了CAD/CAPP/PDM/ERP各子系统信息集成的方法;阐述了CAD/CAPP/PDM/ERP系统的实施步骤,为企业信息化提供一套信息集成的解决方案. 相似文献
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廖剑红 《精密制造与自动化》2012,(3):5-8,16
PDM与CAD/CAPP/ERP的集成应用是推进企业整体信息化的重要途径。详细介绍了PDM与CAD/CAPP/ERP之间的功能和关系,探讨了集成应用实施总体规划,从集成内容内核心、集成方式等方面分析了PDM与CAD/CAPP/ERP的集成以及在企业应用中的实现,为制造企业实施PDM与CAD/CAPP/ERP的集成提供了有益的借鉴。 相似文献
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《机械工程与自动化》2015,(4)
论述了PDM系统与CAD、CAPP及ERP系统集成的必要性及各系统之间的相互关系,确定了基于PDM平台的集成方案。分别阐述了PDM与CAD、CAPP及ERP集成的内容及方式,着重讲述如何采用中间数据库方式实现PDM与ERP信息的共享。最终实现PDM对产品数据的管理,且打通了设计信息和生产信息的数据通道,保证了企业数据系统的完整性和一致性。 相似文献
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面向企业的CAD/CAM/CAPP/PDM/ERP集成系统 总被引:8,自引:1,他引:7
分析了目前机械制造企业的CAD/CAX应用概况,提出了一种面向企业的CAD/CAM/CAPP/PDM/ERP系统的集成框架和实施内容,以适应现代企业的需要。 相似文献
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信息分类编码一直是企业信息化过程中的一个重要问题。企业要实施信息化,无论是CAD、CAPP、PDM、ERP还是其他信息系统,首当其冲的问题就是如何进行信息分类编码。信息分类编码的好坏关系到企业信息系统(CAPP、PDM、ERP)的长期运行质量和系统运行的寿命周期。 相似文献
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在目前的CAPP/PDM/ERP集成应用中,一般只考虑了信息集成,而很少去实现过程集成管理。本文提出了基于EAI的信息化制造系统的框架,研究了CAPP/PDM过程集成的实现技术和方法,并给出了一个应用实例。 相似文献
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J. Campa-Molina† O. Blanco† A. Correa-Gomez M. Czank‡ & A. G. Castellanos-Guzman 《Journal of microscopy》2002,208(3):201-211
The domain structures of Zn3B7O13Cl, Zn3B7O13Br and Zn3B7O13I boracite single crystals were studied by means of polarized light in conjunction with electron microscopy. Single crystals of the three compositions were grown by chemical transport reactions in closed quartz ampoules, at a temperature of 900 °C and were examined by polarizing optical microscopy (PLM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). For both PLM and SEM, the same as‐grown samples were used without having to resort to metallization of the crystal faces. For TEM the single crystals were crushed and mounted on holey carbon films. Comparative electron microscope images were useful for revealing the domain structure of these ferroelectric/ferroelastic materials previously observed between the crossed polars of an optical microscope. X‐ray diffraction analysis of the pulverized crystals was performed for this triad of halogen boracites containing zinc as a common metal. 相似文献
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Stress intensity factors for pairs of diametrically opposite radial cracks on the inside of a jacketed pressurized hole in a thick cylinder have been calculated by using finite element technique. Burst tests on thick cylinder rock samples under above conditions have been performed and the KIC values for Antrim Shale and Limestone determined. The method is very convenient for rocks whose samples are often available in form of cylindrical bars drawn as cores from underground drilling. 相似文献
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基于太赫兹光谱的人参和西洋参鉴别 总被引:1,自引:0,他引:1
为了快速区分人参和西洋参,依据两者所含的人参皂苷在太赫兹波段具有不同指纹光谱,提出了一种基于人参皂苷的太赫兹光谱鉴别人参和西洋参的方法。采用MATLAB软件识别人参和西洋参的太赫兹光谱,同时根据太赫兹光谱特征并通过标准的主成分分析(PCA)区分出人参、西洋参。实验结果表明,基于太赫兹光谱的主成分分析可精确区分出人参、西洋参,并且还可以应用于其他类似物质的区分中。 相似文献
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R.B. Zipin 《Precision Engineering》1990,12(2)
European manufacturers have proposed a set of surface roughness parameters based on an examination of the variation in slope of the bearing ratio curve of a surface profile. It is shown, that the proposed procedure provides no useful information, and indeed is misleading, since the bearing ratio curve of even a normally-distributed random surface profile exhibits the expected variation in slope when plotted on rectangular coordinates. On the other hand, the desired information is readily obtained by a similar examination of the cumulative height distribution of a surface profile (the unity complement of the bearing ratio) when it is plotted on normal probability coordinates. 相似文献
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An Al86 Mn3 Be11 alloy cast into copper mould was subjected to metallographic investigation. The as-cast microstructure consisted of a quasicrystalline icosahedral phase (i-phase), Be4 AlMn phase and, occasionally, a hexagonal phase. Al-rich solid solution represented the dominant phase. The chemical compositions of phases were determined using AES. The composition of the Be4 AlMn slightly deviated from the stoichiometric composition, whereas the composition of the i-phase was approximately Al52 Mn18 Be30 , containing an appreciable amount of Be. The average composition of the hexagonal phase was Al66 Mn21 Be13 . Deep etching and particle extraction provided a deep insight into the three-dimensional morphology of the i-phase and the hexagonal phase, whereas Be4 AlMn was slightly attacked by the etchant. The i-phase was present predominantly in the form of dendrites and a rodlike eutectic phase. The hexagonal phase was primarily in the form of hexagonal platelets, whereas Be4 AlMn was rather irregular in shape. The morphology of the i-phase can be explained by predominant growth in 3-fold directions and the lowest energy of the 5-fold planes, leading to the faceting and adopting a pentagonal dodecahedron shape. The brightnesses of phases in the backscattered electron images were rationalized by determining their backscattering coefficients. TEM investigation showed considerable phason strain in the i-phase, and the polycrystalline nature of the Be4 AlMn phase. 相似文献
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Ali Asadi Ali Sadough Vanini Amin Jabbari 《Journal of Mechanical Science and Technology》2011,25(9):2179-2184
Lightweight laminated composites containing a ceramic front layer and a metallic backing layer were used in order to protect
people, moving equipment, and mobile vehicles from high velocity impact and the increased mobility of mobile vehicles. In
this study, by adding10 vol% SiC and 500 ppm MgO nanoscale particles on the microstructure of Al
2
O
3 matrix and applying optimum sintering conditions, ceramic performance against high-speed projectile impact was improved.
To perform this investigation, a number of target samples with two different types of front layers (alumina and Al
2
O
3-SiC-MgO nanocomposite ceramic) were produced. Impact tests were conducted on these samples using 7.62 mm projectiles with a velocity
of 820 ± 15 m/s. The amount of bulge and bending of the backing layer caused by impact tests was measured. The results of
the impact tests on the samples made of Al
2
O
3-SiC-MgO nanocomposite ceramics and alumina were also compared and analyzed. The results indicate that the substitution of Al
2
O
3-SiC-MgO ceramic layer — which is proffered in this paper — instead of pure alumina ceramic layer, decreases the areal-density of
the samples by at least 30% and improves mechanical properties by about a 60% increase in flexural strength and 100% growth
of the energy distribution factor, which impressively increases impact energy absorption. 相似文献
18.
Crack/particle interactions in alumina/silicon carbide nanocomposites have been investigated by scanning electron microscopy and transmission electron microscopy, with cracks induced by Vickers microindentation. Intergranular cracks are frequently deflected into grains by SiC particles on grain boundaries inclined to the average direction of crack propagation. This mechanism is proposed to explain the change in the fracture mode from intergranular fracture for monolithic alumina to predominantly transgranular fracture for the nanocomposites. Neither stress-induced microcracking around SiC particles nor significant crack deflection by intragranular particles was found to occur in the nanocomposites. It is argued that an addition of nanoparticles may not be a promising approach for increasing the toughness of alumina. 相似文献
19.
I. I. Smolyaninov H. Y. Liang C. H. Lee C. C. Davis V. Nagarajan† & R. Ramesh† 《Journal of microscopy》2001,202(1):250-254
Near-field optical second harmonic microscopy has been applied to imaging of the c/a/c/a polydomain structure of epitaxial PbZr x Ti1– x O3 thin films in the 0 < x < 0.4 range. Comparison of the near-field optical images and the results of atomic force microscopy and X-ray diffraction studies show that an optical resolution of the order of 100 nm is achieved. Symmetry properties of the near-field second harmonic signal allow us to obtain good optical contrast between the local second harmonic generation in c- and a-domains. Experimentally measured near-field second harmonic images have been compared with the results of theoretical calculations. Good agreement between theory and experiment is demonstrated. 相似文献