加强设计审核的方法探索

设计审核是控制设计质量的第一道关口,加强设计审核,可以降低设计差错率。通过对设计审核过程的分析,探讨了对设计审核人员、过程和工具的管理方法,希望以此对设计审核质量的提高起到积极的作用。     

质量体系认证与员工素质

在质量体系认证过程中,人的素质是其中起关键作用的因素,而要提高员工素质,培训是必不可少的重要一环。     

MySQL数据库在嵌入式Linux平台上的移植和应用

MySQL数据库和嵌入式系统的应用十分广泛,但是关于嵌入式系统中数据库方面的研究尚为数不多.通过对MySQL数据库源代码和编译步骤的修改,可以将其移植到嵌入式Linux平台上.移植完成后,使用C语言接口函数编写应用程序便可登录远程数据库并进行查询和修改等操作.将MySQL数据库与MiniGUI图形界面相结合,可以使对数...     

Reversibility of Temperature-Induced Liquid Transition in Pb26Sn42Bi32 Melt: Experimental Evidence with Electrical Property

Exploring nature of liquid structures and properties is becoming more interesting in various fundamental and applied fields. With different resorts including the resistivity method, temperature-induced liquid-liquid structure transitions （TI-LLST） have been suggested and verified to occur in some liquid alloys, while the reversibility of TI- LLST has rarely been examined as yet. Unlike some other investigated liquid alloys, here we show that electrical resistivity of Pb26Sn42Bi32 melt exhibit an anomalous change in the first heating run and a reversible change in the following cooling and heating cycles. Taking account of the structural sensitivity of electrical resistivity, the abnormal patterns suggest two sorts of TI-LLST that are irreversible and reversible in the liquid ternary alloy, respectively. This interesting phenomenon together with other growing evidence imply that liquid structures and their change characteristics are multiform and complex.     

中学化学教学中生活性知识要求异变的研究

随着“教育回归生活”的呼声渐高,生活性知识逐渐成为化学课程中不可或缺的部分,但是在教学实践中,生活性知识逾越预设的功能和要求而异变的现象却屡见不鲜。本文就“碳酸钠溶液显碱性”知识点围绕文本、教学及评价3个层面展开分析比较,提炼其异变特征,探讨异变的原因及对化学课程实践产生的影响,进而思考改进生活性知识应用的途径与方法。