Ecological environment destruction and agricultural production decay in Shanxi in Qing dynasty;
清代陕西生态环境的破坏与农业生产的衰变
From the test,the performance decay law of the modified bitumen and its mechanism were obtained.
通过模拟SBS改性沥青在生产、运输和施工等情况下的高温储存状况,对成品改性沥青的针入度、软化点、延度和弹性恢复等主要性能指标进行了全面试验,获得了高温储存时改性沥青的性能衰变规律,并分析提出了其性能衰变机理。
Two methods for monitoring the degradation of engine oil in service through TAN change and FTIR spectroscopy are analyzed and their characteristics are investigated by contrasting the test data obtained from different methods in the field test.
分析了两种常用监控在用发动机油氧化衰变情况的试验方法,并通过监控试验数据,探讨酸值和红外两种监测方法的各自特点,提出高档发动机油酸值变化极限值应区别于中低档发动机油的观点,为今后监控在用发动机油选用合适的试验方法和标准提供了参考。
The tow methods for monitoring the degradation of used engine oil including TAN and FTIR spectrascopy were studied, and the characters of the test method mentioned above were also inquired by contrasting the data acquired from different methods.
分析了两种常用的监控在用发动机油氧化衰变情况的试验方法,并通过监控试验数据,探讨酸值和红外两种监测方法的各自的特点,提出了高档发动机油酸值变化极限值应区别于中低档发动机油的观点,为今后监控在用发动机油选用合适的试验方法和标准提供了参考。
Aim To identify protein spots on two dimentional protein electrophoresis (2DE) by post-source decay (PSD) technique associated with library search.
目的 应用源后衰变 (PSD)技术结合数据库检索鉴定二维蛋白质电泳 (2DE)胶上的蛋白质斑点。