手写体汉字识别中的一种新的特征提取方法——弹性网格方向分解特征

本文研究手写体汉字识别中的一种新的特征提取方法—弹性网格方向分解特征，在该方法中，我们将手写体汉字进行横、竖、撇、捺四方向的分解，然后根据该汉字的笔划分布构造一组非均匀的弹性网格，将弹性网格分别作用于汉字的四方向分量上，统计汉字象素点在网格中的概率分布来作为特征。对１０３４类汉字共５１７００个手写体汉字样本的实验我们得到了９４３９％的识别率，表明该特征提取方法是十分可行和有效的。     

手写体汉字识别中的一种新的特征提取方法——弹性网络方向分解特征

本文研究手写体汉字识别中的一种新的特征提取方法－弹性网络方向分解特征，在该方法中，我们将手写体汉字进行横，竖，撇，捺四方向的分解，然后根据该汉字的笔划分构造一组非均匀的弹性网格，将弹性网格分别作用于汉字的四方向分量上，统计汉字象素点在网格上的概率分布作为特征，对１０３４类汉字共５１７００个手写体汉字样本的实验我们得到了９４．３９％的识别率，表明该特征提取方法是十分可行和有效的。     

以笔画结构分析为基础的一种限制性手写汉字识别方法

本文介绍的限制性手写汉字识别方法,着眼于提取和分析汉字的笔画及相互间的结构关系,并以一种简单的形式对汉字进行描述和识别。对500个汉字所作的模拟实验,得到了满意的效果。     

一种基于集成BP网络的手写汉字识别方法

针对脱机手写体汉字识别，文章给出了一种基于多层BP网络的并行集成方法，该方法是纯神经网络的多分类器并行集成方案。汉字经预处理后，采用弹性网格变换和Zernike矩分别对汉字进行局部和全局特征提取，利用两个BP网络分类器对这两种特征进行训练和初分类。再利用集成网络对前两个子网络的识别结果进行识别。同时对BP网络的应用做了有益的探索，也为BP网络在人类别分类问题中的应用提供了一条可行的途径。实验结果验证了此方法的有效性。     

区域分解时域有限差分方法(DD-FDTD)及其在散射问题中的应用

本文提出一种区域分解的时域有限差分算法(DD-FDTD).依据待解问题的特点,把待解问题分解为几个子区域,在各个子区域中,采用适合于该区域的共形网格进行划分计算,通过一种有效的信息传递方案,把各个子区域综合起来,获得原问题的解.通过采用这种方法,一个复杂的问题可以得到简化,从而变得适于求解,同时,共形网格和精确的信息传递方案的使用,大幅度提高了计算精度.文中,用该算法对二维电磁散射问题进行了分析计算,获得了精确的计算结果.     

基于笔画特征的叠加文字检测方法

提出一种利用笔画线条的统计特征基于支持向量机进行图像中叠加文字检测的方法。该算法首先通过一种改进的线段检测算子提取出笔画线段；然后对笔画线条通过区域合并定位出候选文字块；接着对候选文字块提取一个反映文字笔画线条空间分布特点的32维特征，并通过支持向量机建立的模型对候选文字块进行确认分类。以汉字为例的初步实验表明所提出笔画纹理特征对较多字符构成的文字区域具有很好的性能。     

基于数学形态学的模糊子笔画提取

文章提出了一种数学形态学和模糊方向特征融合的方法,实现对手写体汉字的模糊子笔画的提取,进而实现手写体汉字的识别。实验证明,这是一种非常有效的子笔画提取方法。     

一种振镜扫描汉字激光打标优化算法

为了提高汉字激光打标效率,结合笔画跟踪算法和贪心算法,给出了一种振镜式汉字激光打标优化算法。该算法首先提取出汉字的连续笔画,然后运用贪心算法获得汉字笔画最优输出路径,最后按最优路径实现激光打标。结果表明,该算法减少了激光大跳跃次数,提高了汉字激光打标效率。     

基于随机循环网络的汉字骨架生成

汉字骨架是汉字字形的重要拓扑描述，提供了汉字字形结构的重要信息。汉字骨架可以视为点序列，运用具有序列输出的循环神经网络（RNN）等生成。然而当前输出长序列的深度神经网络通常面临诸如梯度消失或爆炸，需要大量训练样本和训练时间长等问题，导致此类方法生成的汉字骨架蕴含的书写细节较少，同时缺乏对汉字结构的准确描述。文中将汉字的结构信息与神经网络方法相结合，使用多个并行的随机循环网络（RRN）生成汉字骨架，生成过程在两个层面进行，字符层面包括一连串的笔画，而笔画层面包括一连串的点。生成模型仅需小规模的训练数据即可完成训练，同时避免了梯度消失或爆炸的问题，不仅增强了对汉字结构的描述，而且保留了更多的骨架特征点。实验结果表明，该方法生成的汉字骨架具有更丰富的书写细节特征，可用于快速生成大规模、高质量的汉字骨架。     

基于2D几何与纹理信息分离模型的表情分析与合成

本文提出一种用于特定人逼真表情图像合成的新方法，该方法利用二维网格描述部呈现不同表情时的几何变化，并使用一分析方法将该网格序列用参数化模型表示，从而极大地压缩了数据，在重构表地利用参考帧提供了场景纹理信息，结合网格参数模型提供的几何信息，使用图像卷曲与插值技术，生成逼真表情图像，目前使用方法对人脸下部半表情图像分析及合成进行了初步的实验，实验结果表明了该种方法的有效性。     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first