共查询到20条相似文献,搜索用时 149 毫秒
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本文讨论了互换性定律的族系,研究了非训练行为不准确现象,讨论了行为互换性的需求,推论了行为互换性定律的存在,建立了行为互换性的概念,创建了行为互换性定律的命题及其数学模型,详述了定律的内涵,分析了行为互换性与其他互换性的关系,讨论了行为互换性定律的对象范围、互换类型、自身特点和作用意义,对行为互换性定律进行了验证分析,讨论了行为互换性定律的应用,并给出了应用例子。 相似文献
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标准化学科几何互换性定律的创建 总被引:1,自引:1,他引:0
本文讨论了规律和定律的关系和特点,讨论了几何互换性的本质关系,推论了互换性定律的存在,创建了动配合互换性定律、定位配合互换性定律、紧配合互换性定律,建立了定律的命题、数学模型和关系模型,详述了每个定律的内涵,创建了支持互换性工程应用的几何互换性空间,讨论了互换性定律的应用,创建了广泛适用的互换性空间。 相似文献
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介绍了智能型电子分克秤的工作原理及硬件、软件的系统设计.整机的硬件设计,采用高阻值的传感器,软件由单片机控制完成双积分A/D转换,使整机既降低了功耗又降低了硬件成本,实现了分检计量智能化的控制,提高了工作效率,减轻了操作人员的劳动强度,避免了产品检测过程中的人为误差. 相似文献
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本文讨论了互换性的新模式——功能互换性,阐述了功能互换性的概念和特点,创建了功能互换性的命题,解读了功能互换性命题的内涵及其数学模型,给出了功能互换性的关注情形,探讨了功能互换性的适用范围和作用意义,验证了功能互换性定律的有效性,说明了功能互换性定律的应用,并给出了指导功能互换性定律应用的实例。 相似文献
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一叶知秋,一字知人。一滴水折射出了七彩之光,一本作业也同样闪烁出了孩子的勤奋,闪烁出了孩子的诚实,闪烁出了孩子的认真,闪烁出了孩子的聪明……闪烁出了一个热爱生命,热爱生活,积极向上的孩子。 相似文献
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《互联网时代》是以全球背景下的视野,聚焦了历史、聚焦了文化、聚焦了社会功能,通过十集的影像表达,缔造了一个时代所呈现的互联网巨大变革,满足了受众,创造了经济效益,开创了中国纪录片史上的又一个里程碑,同时创造了较高的社会现实意义。完成了近乎完美的中国映像,为中国纪录片占有国际地位奠定了社会基础。 相似文献
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以项目风险管理为研究对象,建立了项目风险管理系统模型。应用层次分析法对项目进行了风险评估,应用等风险图法对项目主要风险进行了具体分析,并制定了相应的风险控制措施,取得了成效。项目的实际运行验证了该模型的适用性、可行性。 相似文献
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Saraswati Venkataraman 《Bulletin of Materials Science》1995,18(7):831-843
The inorganic content of human tooth is predominantly hydroxyapatite. The content varies in enamel and dentin. A reversible
thermal transformation at 157 C is observed and has correspondence in the dielectric measurements. The dental decay is related
to the piezoelectric property of tooth, which is similar to a polar glassceramic. The toughness of tooth is higher than hotpressed
hydroxyapatite and owes it to the microstructure signifying the importance of a weak, pliable interface. The hardness is graded,
higher for enamel in the crown and very much lower for dentin, to suit their function and environment. The relevance of biomimics
in designing materials for advanced performance is discussed. 相似文献
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P. Thirumurugan P. Shanthakumar 《International journal of imaging systems and technology》2016,26(2):157-162
In this article, the segmented brain tumor region is diagnosed into mild, moderate, and severe case based on the presence of tumor cells in the brain components such as Gray Matter (GM), White Matter (WM), and cerebrospinal fluid (CSF). The modified spatial fuzzy c mean algorithm is used to segment brain tissues. The feature Local binary pattern is extracted from segmented tissues, which is trained and classified by ANFIS Classifier. The performance of the proposed brain tissues segmentation system is analyzed in terms of sensitivity, specificity, and accuracy with respect to manually segmented ground truth images. The severity of brain tumor is diagnosed into mild case if the segmented brain tumor is present in the grey matter. The severity of brain tumor is diagnosed into moderate case if the segmented brain tumor is present in the WM. The severity of brain tumor is diagnosed into severe case if the segmented brain tumor is present in the CSF region. The immediate surgery is required for severe case and medical treatment is preferred for mild and moderate case. 相似文献
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The thermogravimetric method is used to investigate the kinetics of oxidation of zirconium iodide in an air-argon mixture in the temperature range from 1380 to 1968 K. The high-frequency induction heating is used to attain high temperatures. The temperature is measured by a precision optical monochromatic pyrometer using a black-body model located in the sample being investigated. The increment of sample mass is measured continuously using a spring balance. One sample is investigated, whose temperature is successively increased in jumps with stops on isotherms. The transition of tetragonal modification of oxide film to a mixture of tetragonal and cubic modifications is registered at 1745 K. The obtained results are used to calculate the Arrhenius equation for tetragonal modification of oxide film in the range from 1380 to 1730 K. The activation energy is 180.7 kJ/mol. The obtained results are compared to available literature data. 相似文献
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L.S. Tth 《Advanced Engineering Materials》2003,5(5):308-316
The majority of the techniques of severe plastic deformation calls for simple shear deformation mode. This is why a special interest is given in this paper to textures that develop in simple shear. The evolution of texture in Equal Channel Angular Extrusion (ECAE) is also discussed in detail. The classical “simple shear model” of ECAE is examined as well as a new, more precise flow field which uses an analytical flow function. The proposed function is inspired from finite element calculations. The velocity gradient that follows from the analysis is incorporated into the self consistent viscoplastic polycrystal code. The evolution of deformation texture is predicted up to two passes in the A‐route ECAE deformation of copper polycrystal when the extrusion angle is 90°. 相似文献
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I. A. Chaban 《Journal of Superconductivity》1996,9(1):33-42
The impurity mechanism proposed earlier is used to interpret the magnetic properties of hightemperature superconductors. The appearance of superconductive granules and the existence of weak bonds in grains of ceramics and in single crystals is explained. The irreversibility line is obtained and its new interpretation as the line of thresholds of appearance of infinite nonsuperconductive cluster is given. The relaxation time of the magnetic susceptibility in alternating magnetic fields is calculated. The decrease of the Meissner fraction with increase in magnetic field and decrease in doping, and other magnetic properties are explained. 相似文献
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单螺杆挤出机混合过程界面追踪表征 总被引:2,自引:0,他引:2
基于涡量速度法,推导出单螺杆挤出机内三维流动无因次控制方程,提出了一种求解非牛顿流的新方法。采用交错网格,对挤出机内的幂律流体三维流动进行了有限体积方法数值模拟,得到了螺槽内的速度分布。提出了Galerkin速度逼近方法,利用Largrange插值获得速度场。借助4阶Runge-Kutta方法对流体质点运动进行数值积分追踪,对螺槽内的层流混合进行了表征。发现了界面拉伸过程中不同初始位置的示踪剂界面拉伸总体呈线性增长,但伴有周期性振荡效应。这种效应在贴近螺壁面的流体单元表现最大,甚至超过了界面平均增长的量级。 相似文献