基于方向数探测法的倾斜乐谱识别技术研究

计算机光学乐谱识别(OpticalMusicRecognition,OMR)利用扫描仪等数码设备,对已有的纸质乐谱进行扫描,形成数字乐谱图像,再利用专用的软件系统进行处理与识别,提取出音乐信息.文章根据乐谱中音乐符号的统计与结构特征,提出了方向数的概念,并构造出方向数探测法,利用此方法对倾斜数字乐谱图像进行谱线、小节线和符干的识别,通过对50例乐谱的试验,取得较好的效果.     

一种新的用于集装箱字符的识别方法

主要以集装箱字符识别为例,详尽地论述了模板匹配的基本,同时,为了提高识别率,减少计算量和运行时间,满足实际应用的需要,特别是针对在实际图像中背景与字符均是彩色信息的应用来说,其二值化得到的图像可分为两种,即黑底白字和白底黑字,为了解决同一字符需要制作正反两种不同标准模板的问题,提出了一种改进的标准模板制作方法,这种模板能够自适应地匹配二值化后的正反图像,算法简单实用,理论与实验结果均表明,改进的模板匹配方法具有较高的识别率和坚韧性。     

一种粒度思想的遥感特征信息识别方法

为了快速分析遥感图像特征信息,结合覆盖分类算法提出了一种商空间理论方法,其中灵活运用商空间理论的分解方法和合成技术来指导遥感图像信息的提取和整合,覆盖算法能快速精确地挖掘出有限信息的本质,为分类提取提供保障.以汶川特大地震后的高级星载热辐射热反射探测仪(ASTER)遥感图像为例进行了实验分析,证实了该方法是快速、精确有效的,可以大大减少遥感图像信息处理的工作量.     

一种新的说话人识别序列特征提取方法

针对支持向量机不能直接处理动态时间序列的语音数据问题,提出一种基于PCS-PCA分类器和AOI-Fisher分值(add original information fisher score)法的序列特征提取方法.首先利用PCA对每位注册说话人的特征向量进行维数约简,由转换矩阵得到每位说话人的主成分空间(principal component space,PCS),在此空间上快速判断出可能的R个说话人;然后在R个可能说话人的约简向量集上建立高斯混合模型;最后利用AOI-Fisher分值法进行向量定长转换的同时,为每位说话人的特征向量添加一维原始分类信息log P(X|θ).仿真实验结果表明,将该序列特征提取方法应用于SVM说话人确认系统,在不影响系统识别速度的情况下,具有较高的识别性能.     

Immune recognition. A new receptor for beta-glucans.

The carbohydrate polymers known as beta-1,3-d-glucans exert potent effects on the immune system - stimulating antitumour and antimicrobial activity, for example - by binding to receptors on macrophages and other white blood cells and activating them. Although beta-glucans are known to bind to receptors, such as complement receptor 3 (ref. 1), there is evidence that another beta-glucan receptor is present on macrophages. Here we identify this unknown receptor as dectin-1 (ref. 2), a finding that provides new insights into the innate immune recognition of beta-glucans.     

一种超宽带脉冲的设计新方法

以最大限度地接近FCC（联邦通信委员会）辐射掩蔽要求为目标,以具有不同波形形成因子、不同阶次的高斯脉冲导函数为基函数、利用遗传算法来优化权重系数向量,提出基于遗传算法优化权向量的高斯导函数线性组合的超宽带（ultra-wideband,UWB）脉冲设计。以FCC对UWB系统室内辐射功率的限制进行实验,结果表明,与二阶高斯微分脉冲、随机组合脉冲相比,基于遗传算法的组合脉冲能够较好地满足FCC制定的室内辐射掩蔽标准,同时减小了误码率。     

控制Lorenz系统的新方法

讨论Lorenz混沌系统的控制问题.首先将Lorenz系统用模糊T-S模型来表示,然后引入脉冲控制律,利用脉冲微分系统理论进行分析,得到了Lorenz系统的脉冲控制准则.根据该准则所设计的脉冲控制器,可以驱动受控Lorenz系统的轨线以指数衰减率收敛于平衡点.     

新的螺旋桨尾涡近似方法

基于解析尾涡模式,提出了一种新的尾涡近似方法．尾涡分为近区和远区．在近区,尾涡在选定扇形截面上解析地求出,在其他处通过非线性插值求得;利用了解析尾涡的特点同时减少了计算量．根据流体连续性方程确定尾涡的收缩半径,避免了梢涡半径的不收敛性,为重负荷螺旋桨设计和非设计工况下螺旋桨性能计算提供了一种有效的尾涡近似计算方法．     

测量放大器电路新探索

介绍三运放测量放大器电路的主要技术特性 ,对其频率稳定性问题进行讨论 ,并给出简单的补偿电路     

A deeply knotted protein structure and how it might fold

The search for knots in protein has uncovered little that would cause Alexander the Great to reach for his sword. Excluding knots formed by post-translational crosslinking, the few proteins considered to be knotted form simple trefoil knots with one end of the chain extending through a loop by only a few residues, ten in the 'best' example. A knot in an open chain (as distinct from a closed circle) is not rigorously defined and many weak protein knots disappear if the structure is viewed from a different angle. Here I describe a computer algorithm to detect knots in open chains that is not sensitive to viewpoint and that can define the region of the chain giving rise to the knot. It characterizes knots in proteins by the number of residues that must be removed from each end to abolish the knot. I applied this algorithm to the protein structure database and discovered a deep, figure-of-eight knot in the plant protein acetohydroxy acid isomeroreductase. I propose a protein folding pathway that may explain how such a knot is formed.     

动态系统参数估计的一种新方法

分析了利用Ｈｏｐｆｉｅｌｄ神经网络进行系统参数估计的基本原理，把参数估计问题转化为Ｈｏｐｆｉｅｌｄ网络的能量函数的最小化问题．当能量函数达到最小值时，Ｈｏｐｆｉｅｌｄ网络的输出即为待估计的参数值．仿真实验证明了该方法的有效性．     

非线性系统控制器综合的一种新方法(英文)

基于正切线性化控制技术和状态依赖Riccati微分方程方法,提出了一种新的非线性控制器综合策略.受正切线性化控制的启发,首先,将一类非线性系统的非线性反馈镇定问题转化为状态依赖线性时变系统的反馈镇定器设计问题.然后,给出了求解导出线性时变系统反馈镇定器设计问题的一种基于状态依赖Riccati微分方程方法.为实现该控制器的求解,仅需实时求解给定正定初始条件下的状态依赖Riccati微分方程.此外,本文所得到的解析结果还能保证非线性闭环反馈系统的指数渐近稳定性.最后,用一个数值算例验证了本文给出方法的有效性.     

A new approach to query expansion in information retrieval

To eliminate the mismatch between words of relevant documents and user's query and more serious negative effects it has on the performance of information retrieval,a method of query expansion on the basis of new terms co-occurrence representation was put forward by analyzing the process of producing query. The expansion terms were selected according to their correlation to the whole query. At the same time, the position information between terms were considered. The experimental result on test retrieval conference (TREC) data collection shows that the method proposed in the paper has made an improvement of 5%～19% all the time than the language modeling method without expansion. Compared to the popular approach of query expansion, pseudo feedback, the precision of the proposed method is competitive.     

A new approach to VC routing in ATM networks

A new ant-algorithm-based routing approach is proposed for the VC routing problem with considering the comprehensive effect between the resource utilization and the load balance in ATM networks. In the approach, the backup paths are calculated first, and then an ant algorithm based on the ability of ants to find the shortest path between their nest and the food source during their searching food, is constructed to optimize the VC global route. Simulation results show that the proposed approach can realize VC routing effectively according to the current traffic states in the networks and the user-specified delay requirements. Foundation item: Supported by Shanghai Post & Telecom Administration-SJTU Information and Telecom Joint Lab Project (1999-GR1-3) Biography: Li Sheng-hong (1971-), male, Postdoctor, research direction: intelligent technology application in broadband networks and statistical signal processing.     

研究偏序集Sperner性质的一个新方法

设 P是一个有限偏序集 ,Γ是一个群 ,保序地作用于 P上 .Kleitman、Edelberg和 Lubell证明 :P中存在一个 Sperner反链 ,它在Γ的作用下不变 ,换言之 ,它是Γ的某些轨道的并 .给出一个可用于研究偏序集的 NM( normalized matching)性质类似的定理 .     

A new approach to development of composite Web Services

With the requirement for complex Web Services steadily increasing, there is a growing interest for reusing basic, existing Web Services to composite new ones. We present a composite Web Services development approach driven by model driven architecture （MDA） ,using UML（Unified Modeling Language） class diagram to model structure HM （Plateform Independent Platform） and UML activity diagram to model behavior PIM, then by model transformation converting the PIMs to specific Web Services specification platforms and execution platform to get the corresponding PSMs （platform specific models）. The main contributions of this paper are the all-around solution to Web Services composition development and the transformation rules for structure and behavior model of Web Services between PIMs and PSMs.     

一种新的手写体字符识别算法

研究模式识别的核心问题——特征抽取．基于偏最小二乘（Partial Least Squares,简称PLS）回归和特征融合的思想,提出了一种组合特征抽取的新方法并将之用于手写体字符识别中．在PLS建模阶段,为了提高PLS成分（特征）的抽取速度,提出了一种非迭代PLS算法．在特征融合阶段,用所抽取的PLS成分特征组成模式的相关特征矩阵,并依此相关特征矩阵进行分类．在Concordia University CENPARMI手写体阿拉伯数字数据库上的试验结果证实了该方法的有效性和鲁棒性,其分类结果优于基于单一特征的FSLDA方法的分类结果．另外,与已有的迭代PLS算法相比,所提出的非迭代PLS算法的复杂度和特征抽取的速度均占有优势．     

一种有监督的模糊模式识别模型

给出了一种有监督的两类模式识别模型，该模型允许选取模糊特征，其学习或训练方法是模拟人们认识事物的过程实现的，它是Ｃｏｒａ－３模式识别方法的一种拓广。因此可作为较复杂的智能系统或专家系统的识别模型．