DXA测量的骨密度(bone mineral density,BMD)结果和T-值为骨质疏松症领域的临床医生所熟知,且常作为诊断骨质疏松症和治疗决策制定的依据。日常临床和药物研究中,常可见到不同DXA和参考数据造成的测量结果差异、腰椎和股骨近端T-值不一...DXA测量的骨密度(bone mineral density,BMD)结果和T-值为骨质疏松症领域的临床医生所熟知,且常作为诊断骨质疏松症和治疗决策制定的依据。日常临床和药物研究中,常可见到不同DXA和参考数据造成的测量结果差异、腰椎和股骨近端T-值不一致等现象,这些差异和不一致的测量结果常会使医生在骨质疏松症诊断和干预措施选择等方面产生困惑。为提高对上述等问题的认识和对BMD测量结果和T-值的进一步解析,本文进行了相关历史文献回顾和介绍。展开更多
Taking the test data in "Regulation of performance test for utility boilers"(GB10184-88) as example, the influence of uncertainty in temperature testing upon the results of measuring thermal efficiency for u...Taking the test data in "Regulation of performance test for utility boilers"(GB10184-88) as example, the influence of uncertainty in temperature testing upon the results of measuring thermal efficiency for utility boilers has been analsyed by using the error theory. The results of analysis show, the uncertainty in temperature testing has certain influence upon the results of measuring the thermal efficiency of boilers. Hence, it is suggested that the different types of thermocouple and compensation lead wire should be used under different conditions.展开更多
文摘DXA测量的骨密度(bone mineral density,BMD)结果和T-值为骨质疏松症领域的临床医生所熟知,且常作为诊断骨质疏松症和治疗决策制定的依据。日常临床和药物研究中,常可见到不同DXA和参考数据造成的测量结果差异、腰椎和股骨近端T-值不一致等现象,这些差异和不一致的测量结果常会使医生在骨质疏松症诊断和干预措施选择等方面产生困惑。为提高对上述等问题的认识和对BMD测量结果和T-值的进一步解析,本文进行了相关历史文献回顾和介绍。
文摘Taking the test data in "Regulation of performance test for utility boilers"(GB10184-88) as example, the influence of uncertainty in temperature testing upon the results of measuring thermal efficiency for utility boilers has been analsyed by using the error theory. The results of analysis show, the uncertainty in temperature testing has certain influence upon the results of measuring the thermal efficiency of boilers. Hence, it is suggested that the different types of thermocouple and compensation lead wire should be used under different conditions.
