An embedded processor is a microprocessor comprising several discrete chips that enable it to perform multiple functions. These processors are integrated into devices that must be able to handle multiple processes in real time. They include dedicated computing cores (processors), memory, and programmable input and output peripherals. They are compact in size, using a surface mount factor wherein one component is mounted over the other. They are also cost-effective and consume less power. The global embedded processor market was valued at $25.23 billion in 2014 and is likely to reach $30.53 billion by 2019, growing at a CAGR of 3.89%. The MCU segment was the largest revenue contributor in 2014 at $15.20 billion, while the embedded MPU segment contributed $7.15 billion in revenue and the embedded DSP segment followed with a revenue share of $2.88 billion.

A smartphone display is an electronic screen made of glass, plastic, or other flexible substrates, and can either be thick or thin. These screens are lightweight and bendable. As the demand for user-friendly and ubiquitous displays is likely to increase, in the near future, many industry participants are working toward the development of large, high-resolution displays for smartphones. Such displays are durable and resistant to damage. In the future, it is possible that between rigid and flexible displays, the latter will be an included in a wide range of applications.

Servers are the backbone of a data center operation, and they are used mainly for the transfer of data. A server operation is dependent on hardware reliability and durability. A typical server consists of dual-power supplies, RAID disk system, and errorcorrecting code (ECC) memory, which are tested for operations by vendors. There have been several innovations in the design and manufacturing of servers, depending on business needs.

Mobile payments enable account holders to pay bills or purchase online, on the go. Before the advent of smartphones, Java-enabled and Internet-based phones were used sparingly because the usage was limited to SMS and calling options, and the carrier charges were high. However, increased adoption of smartphones, tablets, and other mobile technologies has revolutionized the way customers make payments. The transaction volume in the global mobile payment market is expected to grow at a CAGR of 36.26% during the forecast period. By number of users, the market is forecast to grow at a CAGR of 18.10%. EMEA is the leading region in the market, followed by APAC and the Americas.

通过增加量化电平,Delta-Sigma调制器(DSM)能够获得更好的调制性能.但限于开关功放的具体结构,多电平DSM序列无法直接驱动后级功放,本文根据面积等效原理提出了适用于开关功放的一种电平变换策略.理论分析和仿真结果表明,通过采用合适的电平变换方式,变换序列能够获得比常规2电平DSM序列更优的带内SNR性能.

目标降维算法通过去除冗余的目标达到简化问题规模的目的,为求解高维多目标优化问题提供了一种新的思路和方法.近似解集的几何结构特征和Pareto占优关系从不同侧面反映了多目标优化问题的内在结构特性,而现有算法仅利用其中一种特征分析目标之间的关系,具有较大局限性.本文提出基于稀疏特征选择的目标降维方法,该方法利用近似解集的几何结构特征构建稀疏回归模型,求解高维目标空间映射为低维目标子空间的稀疏投影矩阵,依据此矩阵度量目标的重要性,并利用Pareto占优关系改变程度选择满足误差阈值的目标子集,实现目标降维.通过与其他已有目标降维算法比较,实验结果表明本文提出的降维算法具有较高的准确性,并且受近似解集质量的影响较小.

针对希尔伯特-黄变换(Hilbert-Huang Transform,HHT)中经验模态分解(Empirical Mode Decomposition,EMD)和希尔伯特变换(Hilbert Transform,HT)的不足,提出了一种基于改进的局部特征尺度分解(Improved Local Characteristic-scale Decomposition,ILCD)和归一化正交(Normalized Quadrature,NQ)的时频分析方法.ILCD克服了LCD的固有缺陷,在精确性和正交性等方面要优于EMD和LCD方法.同时为了克服HT的不足,提出了一种基于经验调幅调频分解标准化估计瞬时频率的归一化正交(Normalized Quadrature,NQ)方法.通过仿真信号将EMD,LCD与ILCD进行对比,同时将标准希尔伯特变换,直接正交法与NQ进行对比,结果表明了论文方法的有效性.转子碰摩故障数据分析结果进一步验证了论文方法的有效性和优越性.

为方便一站式处理常见几类各向同性、线性、无磁耗电色散媒质的电波传播问题,提出了一种ADEFDTD-CPML统一实现方案:一是问题空间和吸收边界的统一处理;二是色散特性的统一建模:适用的媒质类型可以是单一的Havriliak-Negami(H-N)媒质、Davidson-Cole(D-C)媒质、Cole-Cole(C-C)媒质、Debye媒质、常规媒质或其任意组合;媒质属性可以是单极或多极的、有电耗的或无电耗的.该方案利用帕德(Padé)近似法,导出了一组整数阶辅助微分方程(ADEs),既克服了时域描述时遇到的分数阶导数困难,又展现了通用性好、复杂度低等优势.几个一维、三维算例解析、数值结果之间的对比,初步证实了统一实现方案的可行性和有效性.