The testing of hydraulic cement is an important element in obtaining quality construction. A testing laboratory must be selected with care. A testing laboratory shall be deemed qualified to perform and report the resu...
详细信息
标准号:
ASTM C1222-2006
The testing of hydraulic cement is an important element in obtaining quality construction. A testing laboratory must be selected with care. A testing laboratory shall be deemed qualified to perform and report the results of its tests if the laboratory meets the requirements of this practice. This practice provides guidance for evaluating the organization, personnel, facilities, and quality systems of the laboratory. This practice may be supplemented by criteria and requirements for particular projects. 1.1 This practice covers the technical training and experience of laboratory testing personnel and identifies the minimum technical requirements for laboratory equipment used in testing of hydraulic cement as prescribed by ASTM. 1.2 This practice provides minimum criteria for evaluating the capability of a laboratory to perform chemical or physical tests listed in the various specifications on hydraulic cement (see Note 1). Noe 1 - Relevant hydraulic cement specifications are Specifications C 91, C 150, C 595, C 845, and Performance Specification C 1157.<> 1.3 The SI units are to be regarded as the standard. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
扫描线校正器(Scan Line Corrector,SLC)是摆扫式成像相机中的重要组成部分,SLC以一定规律转动,使相邻的正、反扫描条带间实现不漏扫和小重叠。为了测试SLC的校正量是否准确,传统的方法是通过外景成像试验实测,但这种方法成本高、周期长...
详细信息
扫描线校正器(Scan Line Corrector,SLC)是摆扫式成像相机中的重要组成部分,SLC以一定规律转动,使相邻的正、反扫描条带间实现不漏扫和小重叠。为了测试SLC的校正量是否准确,传统的方法是通过外景成像试验实测,但这种方法成本高、周期长,对环境要求也较高。针对此问题,文章研究了在实验室下基于靶标的SLC校正量测试方法。该方法以正、反扫校正量差为中间量,通过建立合适的匹配函数计算出SLC校正量曲线的线性起始点,得到SLC在不同扫描视场的校正量,并通过外景试验验证该方法的正确性。
暂无评论