数学美欣赏第4讲第3章数学的奇异性数学的奇异性包括两个方面的内容：一是奇妙，二是变异．数学中的不少结论巧妙无比，令人赞叹，正是因为这一点,数学才有无穷的魅力．变异是指,数学理论拓广后或统一性遭到破坏后，产生了新方法、新思想、新概念、新理论的起点．变异有悖于人们的想象与期望，因此就更引起人们的关注与好奇．凡是新的不平常的东西,都能在想象中引起一种乐趣.因为这种东西会使人的心灵感到一种愉快的新奇，满足它(...
ICS25.160.01CCSJ3315内蒙古自治区地方标准DB15/T3114—2023正交异性钢桥面板焊接施工技术规程Technicalspecificationforweldingprocedureoforthotropicsteelbridgedeck2023-07-25发布2023-08-25实施内蒙古自治区市场监督管理局发布DB15/T3114—2023I目次前言.................................................................................II1范围........................................................................
团体标准T/CCTAS47―2022正交异性钢桥面板焊接技术规程Technicalcodeofpracticeforweldingoforthotropicsteelbridgedeck2022-12-26发布2022-12-31实施中国交通运输协会发布ICS93.040CCSP28全国团体标准信息平台T/CCTAS47—2022I目次前言„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„Ⅱ1范围„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„12规范性...
标准下载ICS77.040.01CCSH26团体标准T/CSTM01100—2023应力场磁各向异性检测仪的性能与检验Performanceandverificationofstressfielddetectorbymagneticanisotropy2023-12-22发布2024-03-22实施中关村材料试验技术联盟发布标准下载T/CSTM01100—2023I前言本文件参照GB/T1.1-2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规定起草。请注意本文件的某些内容可能涉及专利。...
