彩色图像与灰度图像间转换的程序设计

图像处理是一门很有价值的学科,在科学技术不断发展的今天它的技术已趋于成熟.同时图像之间的转换,在实际应用中也显的越来越重要.本文主要介绍彩色图像的灰度转换和伪彩色处理算法.并且利用这两种算法设计出两种图像转换的程序.论文对程序的主要结构进行了说明,列出了程序的流程图.并且对彩色图像和灰度图像的一些基本属性进行了介绍.     

Simple K-band MMIC VCO utilizing a miniaturized hairpin resonator and a three-terminal p-HEMT varactor with low phase noise and high output power properties

Presents a fully monolithic K-band MMIC voltage-controlled oscillator (VCO) implemented by using a 0.25 /spl mu/m AlGaAs/InGaAs pseudomorphic HEMT (p-HEMT) technology. The use of a half-wavelength miniaturized hairpin-shaped resonator and a three-terminal p-HEMT varactor was effective in reducing the chip size and simplifying fabrication processes of the microwave MMIC VCO without impairing the performance of the circuit. The VCO provides a typical output power of 11.5 dBm at 20.8 GHz and a free-running phase noise of -82 dBc/Hz at 100 kHz offset and -95 dBc/Hz at 1 MHz offset. It also shows a tuning range of 70 MHz with little reduction in output power and high yield properties. The chip size of the MMIC VCO is 1.5 /spl times/ 2.0 mm/sup 2/.     

Lineage of non-cranial neural crest cell in the dental mesenchyme: using a lacZ reporter gene during early tooth development

The tooth is one of the ectodermal organs controlled by reciprocal interactions between the epithelium and the mesenchyme. Mesenchymal cells in the developing tooth, so-called dental mesenchymal cells, are derived from two different origins: the cranial neural crest (CNC) and the non-CNC. These CNC-derived cells migrate, proliferate and differentiate into odontoblasts, cementoblasts, fibroblasts, osteoblasts and chondroblasts. Tooth germs of wild-type mice were transplanted into the kidney of adult lacZ-transgenic mice. After 1 week of transplantation, a few lacZ-expressing cells and many red blood cells were found near or inside the blood vessels in the pulp of wild-type tooth germs. This result shows that circulating cells of the adult host could invade the dental pulp during tooth development, through the blood vessels, and be a part of dental pulp tissue. Therefore, it can be suggested that these circulating progenitor cells could be the origin of non-CNC-derived cells in tooth germ and their migration pathways would be the blood vessels invading the dental pulp during tooth development. If variations of this experiment were suitably adjusted, such as the embryonic stage of the tooth germ, duration of transplantation, etc., this transplantation experiment using adult lacZ-transgenic mice could be a good system to reveal the origin and migration pathway of cells in developing organs as well as in dental mesenchymal cells.     

Minimum-energy multicast in wireless ad hoc networks with adaptive antennas: MILP formulations and heuristic algorithms

In this paper, we consider wireless ad hoc networks that use adaptive antennas and have limited energy resources. To explore the advantages of power saving offered by the use of adaptive antennas, we consider the case of source initiated multicast traffic. We present a constraint formulation for the MEM (Minimum-Energy Multicast) problem in terms of MILP (Mixed Integer Linear Programming) for wireless ad hoc networks. An optimal solution to the MEM problem using our MILP model can always be obtained in a timely manner for moderately sized networks. In addition to the theoretical effort, we also present two polynomial-time heuristic algorithms called RB-MIDP and D-MIDP to handle larger networks for which the MILP model may not be computationally efficient. The experimental results show that our algorithms compare well with other proposals discussed in this paper.     

Experimental study for high effective mobility with directly deposited HfO2/La2O3 MOSFET

We experimentally examine the effective mobility in nMOSFETs with La₂O₃ gate dielectrics without SiO_x-based interfacial layer. The reduced mobility is mainly caused by fixed charges in High-k gate dielectrics and the contribution of the interface state density is approximately 30% at N_s = 5 × 10¹¹ cm^?2 in the low 10¹¹ cm^?2 eV^?1 order. It is considered that one of the effective methods for improving mobility is to utilize La-silicate layer formed by high temperature annealing. However, there essentially exists trade-off relationship between high temperature annealing and small EOT.     

基于虚拟仪器的家庭心电监护系统

介绍了基于虚拟仪器的家庭心电监护系统。根据人体心电信号的特征,设计了性能优良的心电信号调理、采集电路;利用NI公司的USB6008作为数据采集设备,配置了DAQ数据采集卡。利用LabVIEW友好的图形化界面和流程图设计软件,设计了用户登陆模块、数据采集模块、波形显示模块、数据分析模块,数据存储模块,波形存储模块,诊断报警模块等模块。     

视觉注意机制的运动方向异常检测方法

针对传统运动方向异常检测方法需要人工参与、智能化较低等缺点,提出了一种新的基于视觉注意机制的运动方向异常检测方法。该方法通过合成源图像的空间导数图与时间导数图获得运动边缘,求取沿空间各方位分布的运动方向特征图。在此基础上,利用所提出的基于运动区域面积的归一化方法对得到的每一幅特征图按照显著性高低分别赋予不同的权重,完成不同运动方向特征的相互竞争。最后融合经过归一化处理的特征图以得到最终的运动显著图。该显著图中运动方向具有显著性的物体得到有效突出,达到了存在多个运动物体的情况时,运动方向上具有显著性的物体能够更加有效、智能地检测出来的目的。     

Minimal realization for lifted periodic filters

Practical applications in signals and systems often deal with lifted models of periodic digital filters, to which well-known methods and computing software for linear time-invariant (LTI) systems can be applied in the analysis and synthesis of periodic filters. When the design of a periodic filter is based on the lifted model, the resultant filter is usually in the lifted LTI form and needs to be further converted into the periodic form for implementational and computational purposes. In this paper, we present a computational procedure for obtaining a minimal realization of periodic digital filters from the fifted model.This work was supported by the Australian Research Council.     

FPGA中浮点乘法器的实现

该文设计的适合于在FPGA中实现的乘法器结构,采用自定义的26位浮点数据格式,利用改进的基4Booth编码方式,以及CSA和4-2压缩器综合的Wallace 树形结构,在尾数的舍入中应用基于预测和选择的快速舍入方法,优化了乘法器的性能.最后给出在PFGA中的仿真结果,验证了设计的正确性,并和32位浮点数据格式的运算结果作比较,发现本设计不但减少占用FPGA内部资源,而且加快了运算速度.     

电力线载波通讯在热网温度监测系统中的应用

采用智能温度传感器DS18B20、热电偶及电力线载波应用于热网温度监测系统。建立了系统总体方案和拓扑结构图、选择了温度传感器,及相应的软硬件系统。实际运行表明,该系统抗干扰能力强,信号传输距离远,能够满足监测系统的要求。