空间函数图形的绘制及方法研究

根据MATLAB的工作机理,受meshgrid函数的启发,设计了区域边界可由函数表示的有界、不规则、连通平面区域上的函数图形的绘制方法,并进一步介绍了如何通过巧妙变换坐标轴来绘制多个曲面所围成的空间体的方法,方法通用性好。利用plot3、surf函数绘制曲线,可将图形做的更漂亮、更形象、更直观;利用ezsurf、surf绘制曲线可以加深对曲线与曲面关系、一元函数与二元函数关系的理解,不同的理解方式可设计不同的绘制空间函数图形的方法。     

一种Windows下实时高效图形绘制算法

针对实时系统中对图形绘制速度的特殊要求,提出一种应用于Windows环境下应用程序客户区中的高效图形绘制算法,给出实现图形水平平移、竖直平移、自由平移、水平缩放、竖直缩放、自由缩放的关键技术。该算法基于无效矩形确定图形中需要绘制的数据和坐标轴范围,可避免大量不必要的重绘工作,实现图形高效、快速绘制,保证操作的实时性。利用内存DC绘图可避免图形闪烁,增强图形显示效果。与Matlab中绘图函数进行性能比较,证明了提出的图形绘制算法是有效的。     

通用点阵式电子器件的图形显示

分析了通用点阵式电子器件的现状及其所具有的特点，以绘制二维曲线为例，介绍了采用整数数字微分法（INTEGER DDA）的绘制算法，详细阐述了点阵式电子器件中的图形显示原理，并结合MGLS-12032A/B液晶和WH4005微型打印机进行验证，取得了比较好的效果。     

图形矢量化中直线拟合与合并算法

直线拟合与合并在图形矢量化中有着重要的作用。拟合使曲线用短直线逼近，便于曲线的识别和快速显示；合并使处于一条直线上的短直线成为一条长直线，能够有效地压缩数据量，更准确地表示图形的拓扑结构，为图形识别创新更好的条件，提出的算法能够完成直线的拟合与合并，在实践中取得了较好的效果。     

VB5.0下参数方程函数图形设计

提出了一种在ＶＢ５．０环境下参数方程函数图形的绘制方法。该方法具有坐标轴可以移动方便的特点,即;通过鼠标的移动任意地展示函数位于坐标不同方向的部分图形。     

大屏幕液晶显示器的图形显示

提出了在与单片机接口的大屏幕点阵液晶显示器上利用整数数字微分法和贝森海姆圆算法完成直线和圆弧绘制的原理和软件实现,从而实现在大屏幕点阵液晶显示器上复杂图形的显示。     

TVGA卡16色图形模式彩色屏幕硬拷贝

在TVGA卡16色图形模式下，将显示存贮器（DRAM）中的红色（R），绿色（G），兰色（B）三个彩色位平面的数据分别读出，并对读出的各彩色位平面数据分别进行左移。分析每一位象素点的颜色值，把具有相同颜色值的象素点，按原来的位权次序构成一个字节，最后，将不同的彩色数据分别送向打印机，即完成了彩色图形硬拷贝。     

跳频编码脉冲信号模糊图的绘制

跳频编码脉冲信号是一种新的脉冲压缩雷达信号形式，极具研究价值。模糊函数是设计和研究雷达信号的主要数学工具。跳频编码脉冲雷达信号模糊函数的计算十分复杂，模糊图绘制非常困难。通过运用模糊函数的卷积算法，应用Matlab语言简便快捷地计算并绘制了三维模糊图、Fd切面图、Td切面图和模糊度图，并给出了绘制方法。     

GDI+测井曲线绘图中效率提升的研究

GDI+提供了快速、简单、有效的程序开发方式.大量测井原始数据生成测井曲线时,绘制对象的增加严重制约了GDI+的绘图效率.双缓冲技术的使用,可以有效避免图形的闪烁;使用内存中已有图形,可以减少测井曲线的绘制过程,显著提高图形绘制效率.     

利用Mathematica绘制函数及数据图形

Mathematica是一个符号计算的软件系统,他不但能为科研人员提供各种数学工具,也可以很方便地验证论文中的计算,而且还可以通过图形绘制等手段获得更多的信息;同时也是中小学生家长检查孩子作业的好帮手。另外,只要给出数据或函数,就可以用Mathematic中简单的几条命令绘制出函数或数据的各种图形,是Mathematica的特色之一。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks