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现代人都开始注重生活质量。比桇,吃要吃得健康,穿要穿得舒服。那空气呢,当然也要关注。现在的天气预报中都会报告空气质量指数,可是忘记收看收听,又如何?人们平时自己怎样知道空气质量呢?发明家为我们提供了这样的产品。 相似文献
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Standard finite element approaches are still ineffective in handling extreme material deformation, such as cases of large deformations and moving discontinuities due to severe mesh distortion. Among meshfree methods developed to overcome the ineffectiveness, Reproducing Kernel Particle Method (RKPM) has demonstrated its great suitability for structural analysis. This paper presents applications of RKPM in elasto-plastic problems after a review of meshfree methods and an introduction to RKPM. A slope stability problem in geotechnical engineering is analyzed as an illustrative case. The corresponding numerical simulations are carried out on an SGI Onyx3900 supercomputer. Comparison of the RKPM and the FEM under identical conditions showed that the RKPM is more suitable for problems where there exists extremely large strain such as in the case of slope sliding. 相似文献
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一、引言在电网企业.企业文化建设与党的建设是紧密联系的。这是由电网企业的性质决定的。电网企业是国有企业,是国家垄断性、公益性的国企,以公共性目标为主。国企以社会职能为目标。以社会效益和国民经济发展的政策性为指标.突出公益性,弱化赢利性的特点决定了电网企业文化建设与党的建设有共同的基础和共同的目标。 相似文献
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衣服要整洁,熨烫是个办法,熨斗就成了必不可少的工具。老式熨斗,其实就是块扁铁,上面加了个把手,放在炉火上烤热,用来熨烫衣服;还有种铜熨斗,里面放火炭,用其燃烧的热量来熨衣服。后来,发明了电熨斗,直接插上电源加热,方便多了。不过,革新的路还远没有尽头。 相似文献
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