利用I-Z曲线的STM"接触"模式的电学测量和表面改性研究

利用STM对金属有机络合物电双稳材料Ag—TCNQ薄膜进行电学性质的表征与改性，在针尖强电场的作用下，当电压达到某一阈值后薄膜从高阻态跃迁至低阻态，这两种高低阻态分别定义为一个存储单元的“0”与“1”状态。本文考虑到在STM的常规恒流工作模式下，针尖与样品之间的隧道结对于电学性质的表征与改性具有影响。为此测量隧道电流I对隧道结宽度Z的依赖关系，I-Z曲线，从而确定针尖刚好接触样品的接触点，利用STM进行了针尖与样品“接触式”的电学测量和表面电学改性研究，并与常规工作模式进行了比较。     

NSOM中石英音叉控制探针—样品间距的机制

建立了音叉－探针－样品系统机械振动方程和电子学振荡方程，并得到其振动特性的解析表达式，进一步得到等效电路的电子学特性，进而系统分析了压电石英音叉的控制探针与样品（T－S）间距离的作用机制及其机电特性。为探针－样品间距控制方法提供了依据。     

面阵列封装器件的贴装技术

面阵列封装器件在电子产品中的使用率逐年上升，如何实现其高速贴装是影响生产线效率的重要因素。从不同的角度论述了面阵列封装器件实现高速贴装的手段与技术。     

用CMOS工艺实现非接触IC卡天线的集成化设计

论述了用CMOS工艺实现非接触式IC卡天线的集成化需要考虑的各个方面,建立了集成天线的模型,给出了合理的设计方案,并通过实验验证了模型和设计方案.实验结果表明,采用片上天线完全可以提供非接触式IC卡工作所需要的能量.在频率为2 2 .5 MHz、感应强度为6×10 - 4 T的磁场中,面积为2 m m×2 mm的集成天线可以为10 kΩ的负载提供1.2 2 5 m W的能量.     

机载预警雷达天线发展趋势及关键技术

综合性预警探测多功能一体化系统是下一代机载预警雷达的一种必然趋势,它要求天线阵面具备多功能、与平台一体化的特征,实现超宽带、多频段性能,并能在硬件资源上支撑数字智能化的系统体系架构。文中首先分析了机载预警雷达天线阵面的发展趋势和国内外研究现状,继而分析了目前机载预警雷达天线系统的关键技术,阐述了相应的技术实施途径和核心问题,提出部分解决方案。     

应用于智能电网的光纤电流传感网络

随着电力系统对电流测量要求的不断提高,传统的电磁式电流传感器已逐渐暴露出一系列的缺陷,如绝缘结构复杂、抗电磁干扰能力差、铁磁谐振、易磁饱和、测量动态范围小和有油易燃易爆炸等。这些缺陷导致传统的电磁式电流传感器已难以满足智能电网的测量需求。本文总结和分析了应用于智能电网的光纤电流传感网络,通过光纤传感与通信技术及计算机技术的融合,使传感由传统的仅仅进行信号形式转换的单个或多个敏感元件扩展为集信号获取、存储、传输、处理于一体的多功能系统,再结合光网络和软件技术,搭建一个结构完整、功能完善的传感体系,实现电网的各项信息指标可观测化。     

基于LTCC 技术的电磁混合耦合宽阻带滤波器设计

针对复杂电磁干扰,采用电磁耦合相消产生传输零点的原理,提出一种基于电磁耦合相消的宽阻带滤波器。对电路谐振单元进行奇偶模分析,在ADS 软件中设计电路,然后在HFSS 软件中对该电路进行三维仿真优化,最后采用LTCC 材料进行生产。该器件采用左右对称结构,以降低设计复杂度和元件体积;利用电磁耦合相消原理确定零点位置,调整谐振间距实现零点控制;加入源负载耦合,以实现第4 个传输零点,增强选择性和阻带宽度。最终设计的宽阻带滤波器物理尺寸为3. 2 mm ×1. 6 mm ×0. 89 mm,实物测试结果表明该器件阻带范围广且通带具有高陡峭性。     

Robust energy-to-peak sideslip angle estimation with applications to ground vehicles

In this paper, the observer design problem for the sideslip angle of ground vehicles is investigated. The sideslip angle is an important signal for the vehicle lateral stability, which is not measurable by using an affordable physical sensor. Therefore, we aim to estimate the sideslip angle with the yaw rate measurements by employing the vehicle dynamics. The nonlinear lateral dynamics is modeled firstly. As the tyre model is nonlinear and the road adhesive coefficient is subject to a large variation, the nonlinear lateral dynamics is transformed into an uncertain model. Considering the variation of longitudinal velocity, an uncertain linear-parameter-varying (LPV) system is obtained. Based on the LPV model, a gain-scheduling observer is proposed and the observer gain can be determined with off-line computation and on-line computation. The off-line computation includes the calculation of a set of linear matrix inequalities and the on-line computation contains several algebraic operations. The proposed design methodology is applied to a four-wheel-independent-drive electric vehicle in simulation. It infers from different maneuvers that the designed observer has a good performance on estimating the sideslip angle.     

Analysis of the Stakeholder Engagement in the Deployment of Renewables and Smart Grid Technologies

The implementation of higher shares of renewables in a global energy mix has to be accompanied by simultaneous deployment of enabling smart grid technologies (SGTs). This combination will inevitably lead to a revolutionary change in a conventional energy system, particularly, the shifting role of consumers to prosumers. But resistance may arise from such a dramatic shift, since it is associated with high uncertainty in conjunction with increasing responsibilities of all stakeholders, the urgent need of effective control, and the development of a process. To ensure the positive influence, coherent actions of all players, and appropriate treatment of the spots of resistance, the analysis of the interplay between key stakeholders has been done. The paper introduces the framework for stakeholders' analysis, applies it on the European Union (EU) example, and provides recommendations to reduce the resistance of SGTs deployment.     

基于距离自适应和有效共享路径感知的光疏导方法

针对灵活网格光网络中如何节约转发器与频谱资源的问题,该文研究了多点到多点组播业务的光路环路由机制,提出一种基于距离自适应和有效共享路径感知的光疏导方法。通过设计一种基于距离自适应的预处理机制,该疏导方法能根据业务成员节点的分布特点和距离自适应准则灵活地为业务构建光路环;在路由与频谱分配阶段,该疏导方法通过构造一个面向光疏导的业务决策矩阵和一个优先调度向量,将业务疏导到与当前业务具有有效共享路径最多的已路由业务上,并优先分配所需的频谱空间以提高光疏导的成功率,实现节约转发器与频谱资源的目的。仿真结果表明,该文提出的光疏导方法可以有效地减少业务消耗的转发器数目和子载波数目。