The structure of the extended gate ion sensitive field effect transistor (EGISFET) is similar to the structure of the ion sensitive field effect transistor (ISFET).Moreover,the non-ideal effect of EGISFET is the mai...The structure of the extended gate ion sensitive field effect transistor (EGISFET) is similar to the structure of the ion sensitive field effect transistor (ISFET).Moreover,the non-ideal effect of EGISFET is the main impediment to development of commercial processes for sensitive devices.It is necessary to promote the stability and reliability of the devices by employing calibration circuits and the better fabrication conditions.The temporal drift exists in the entire measurement experiment. Furthermore,in this study we can reduce the temporal drift effect which influences the stability of the TiN sensitive electrode with the differential front-end offset circuit.The measurement system combines with shifting circuit,differential and instrument amplifiers.We employ the calibration circuit to compare with the variations of the output voltage,and expectably improve the stability and reliability of the TiN sensitive electrode by the novel calibration circuit.展开更多
为量化公路边坡恢复生态系统的固碳潜力,以华南地区公路边坡为研究对象,构建基于植被演替过程的边坡固碳量计算模型,计算公路沿线生态边坡的固碳量,及其固碳功能对公路路基和路面工程施工期CO_(2)排放的抵消作用,并据此分析华南地区公...为量化公路边坡恢复生态系统的固碳潜力,以华南地区公路边坡为研究对象,构建基于植被演替过程的边坡固碳量计算模型,计算公路沿线生态边坡的固碳量,及其固碳功能对公路路基和路面工程施工期CO_(2)排放的抵消作用,并据此分析华南地区公路边坡恢复生态系统的固碳潜力。结果表明:1)公路边坡恢复过程中,植被和土壤固碳量随时间分别呈现先增长后趋于稳定,以及先减小后增长的变化趋势,且植被碳库对边坡固碳量的贡献达到64%以上;2)公路边坡生态恢复的前20年内固碳(C)速率最高,约为0.60~0.69 kg/(m^(2)·a),与红树林等自然生态系统相当;3)2023—2050年间,广连高速公路沿线生态边坡表现出不俗的固碳潜力,其固碳量由4530 t增长至3万1860~3万4660 t CO_(2),占路基和路面工程施工期CO_(2)排放量的比例由2.59%增长至18.25%~19.85%。本研究结果可为边坡碳汇资源的评估提供参考、可为人工边坡碳汇与水土保持功能修复技术的改进提供科学依据。展开更多
文摘The structure of the extended gate ion sensitive field effect transistor (EGISFET) is similar to the structure of the ion sensitive field effect transistor (ISFET).Moreover,the non-ideal effect of EGISFET is the main impediment to development of commercial processes for sensitive devices.It is necessary to promote the stability and reliability of the devices by employing calibration circuits and the better fabrication conditions.The temporal drift exists in the entire measurement experiment. Furthermore,in this study we can reduce the temporal drift effect which influences the stability of the TiN sensitive electrode with the differential front-end offset circuit.The measurement system combines with shifting circuit,differential and instrument amplifiers.We employ the calibration circuit to compare with the variations of the output voltage,and expectably improve the stability and reliability of the TiN sensitive electrode by the novel calibration circuit.
文摘为量化公路边坡恢复生态系统的固碳潜力,以华南地区公路边坡为研究对象,构建基于植被演替过程的边坡固碳量计算模型,计算公路沿线生态边坡的固碳量,及其固碳功能对公路路基和路面工程施工期CO_(2)排放的抵消作用,并据此分析华南地区公路边坡恢复生态系统的固碳潜力。结果表明:1)公路边坡恢复过程中,植被和土壤固碳量随时间分别呈现先增长后趋于稳定,以及先减小后增长的变化趋势,且植被碳库对边坡固碳量的贡献达到64%以上;2)公路边坡生态恢复的前20年内固碳(C)速率最高,约为0.60~0.69 kg/(m^(2)·a),与红树林等自然生态系统相当;3)2023—2050年间,广连高速公路沿线生态边坡表现出不俗的固碳潜力,其固碳量由4530 t增长至3万1860~3万4660 t CO_(2),占路基和路面工程施工期CO_(2)排放量的比例由2.59%增长至18.25%~19.85%。本研究结果可为边坡碳汇资源的评估提供参考、可为人工边坡碳汇与水土保持功能修复技术的改进提供科学依据。
