工科线性代数试题库系统设计基础

工科线性代数试题库系统是微机辅助教学的重要内容．笔者提出了建立试题库的一般性原则，评价试卷质量的指标，建立了试题库的指标体系和自动生成试卷系统．     

POLLUTANT BUILD UP & RUN OFF ON HIGHWAYS; EXPANDING THE CURRENT METHODOLOGY FOR ADDITIONAL DETERMINANDS

Pollutants build up on highways and are washed off during a rainfall event; and are usually discharged via an outfall to a watercourse. CIRIA report 142 (1994) guidance for evaluating wafer quality downstream of a highway outfall considers only copper and zinc in the water quality assessment of highway outfalls; determinands thought to occur in significant concentrations in highway runoff. This guidance has since been adopted in the Design Manual for Roads and Bridges environmental assessment. However, recent investigations suggest that other determinands may occur in unacceptably high concentrations. This paper demonstrates that additional determinands should be considered in the water quality assessment downstream of a highway outfall.     

浅谈均布(EQS)的符合性判断依据

针对实际生产中的均布(EQS),从理论和实际测试两方面入手,分析了用精密测量法和通用量具检验法判断的不重合性,推导出不重合的具体范围并进行修正,将修正后的公差值用于均布符合性判断,在检验中具有实际的指导意义.