The dielectric properties of Au/Si3N4/n-Si (MIS) structures are studied using the admittance measurements (C–V and G/ω–V) each as a function of temperature in a range from 80 K to 400 K for two frequencies (10...The dielectric properties of Au/Si3N4/n-Si (MIS) structures are studied using the admittance measurements (C–V and G/ω–V) each as a function of temperature in a range from 80 K to 400 K for two frequencies (100 kHz and 1 MHz). Experimental results show that both the dielectric constant (ε’) and the dielectric loss (ε") increase with temperature increasing and decrease with frequency increasing. The measurements also show that the ac conductivity (σac) increases with temperature and frequency increasing. The lnσac versus 1000/T plot shows two linear regions with different slopes which correspond to low (120 K–240 K) and high (280 K–400 K) temperature ranges for the two frequencies. It is found that activation energy increases with frequency and temperature increasing.展开更多
随着计算机及网络技术的飞速发展,企业为了提高效率、规范日常管理构建信息系统已成必然.以疗养院系统为背景,介绍了基于Web的B/S与基于分布式结构的三层C/S混合模式的管理信息系统(MIS)设计与实现方案,并从功能结构、体系结构及安全性...随着计算机及网络技术的飞速发展,企业为了提高效率、规范日常管理构建信息系统已成必然.以疗养院系统为背景,介绍了基于Web的B/S与基于分布式结构的三层C/S混合模式的管理信息系统(MIS)设计与实现方案,并从功能结构、体系结构及安全性等方面对系统进行了论述.系统采用SQL Server 2000作为后台数据库管理系统,采用PB 8.0结合HTML语言及ASP等技术实现前台界面的开发.完成的疗养院管理信息系统具有实用价值.展开更多
三层架构作为中小型企业管理信息系统(Management Information System,MIS)的主流开发架构。存在对象模型和关系模型之间的"阻抗不匹配"问题,为了解决该问题,提出了在三层架构的基础上引入对象/关系映射(Object/Relational Ma...三层架构作为中小型企业管理信息系统(Management Information System,MIS)的主流开发架构。存在对象模型和关系模型之间的"阻抗不匹配"问题,为了解决该问题,提出了在三层架构的基础上引入对象/关系映射(Object/Relational Mapping,ORM)层的解决方案,并给出了方案实施中数据持久层架构的建模和设计的关键技术和方法。展开更多
基金Projected supported by Gazi University Scientific Research Project(BAP),FEF.05/2012-15
文摘The dielectric properties of Au/Si3N4/n-Si (MIS) structures are studied using the admittance measurements (C–V and G/ω–V) each as a function of temperature in a range from 80 K to 400 K for two frequencies (100 kHz and 1 MHz). Experimental results show that both the dielectric constant (ε’) and the dielectric loss (ε") increase with temperature increasing and decrease with frequency increasing. The measurements also show that the ac conductivity (σac) increases with temperature and frequency increasing. The lnσac versus 1000/T plot shows two linear regions with different slopes which correspond to low (120 K–240 K) and high (280 K–400 K) temperature ranges for the two frequencies. It is found that activation energy increases with frequency and temperature increasing.
文摘随着计算机及网络技术的飞速发展,企业为了提高效率、规范日常管理构建信息系统已成必然.以疗养院系统为背景,介绍了基于Web的B/S与基于分布式结构的三层C/S混合模式的管理信息系统(MIS)设计与实现方案,并从功能结构、体系结构及安全性等方面对系统进行了论述.系统采用SQL Server 2000作为后台数据库管理系统,采用PB 8.0结合HTML语言及ASP等技术实现前台界面的开发.完成的疗养院管理信息系统具有实用价值.
文摘三层架构作为中小型企业管理信息系统(Management Information System,MIS)的主流开发架构。存在对象模型和关系模型之间的"阻抗不匹配"问题,为了解决该问题,提出了在三层架构的基础上引入对象/关系映射(Object/Relational Mapping,ORM)层的解决方案,并给出了方案实施中数据持久层架构的建模和设计的关键技术和方法。