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Based on an analysis on the present situation and development of three kinds of signal systems (the point system based on interrogator responsor, the quasi moving block system based on digital track circuit and the moving block system based on wireless data transmission) in urban rail transit, some suggestions on the localization of signal system of urban rail transit are put forward.

在分析三种城市轨道交通信号系统制式(基于查询应答器的点式系统、基于数字轨道电路的准移动闭塞和基于无线数据传输的移动闭塞)的现状和发展基础上，对实现我国城市轨道交通信号系统国产化提出建议。

Experimental results confirm that the performance of the discriminative back-propagation training algorithm is better than that of the traditional re-estimation training algorithm based on maximum likelihood and maximum mutual information.

实验表明，基于HMM的反向传播训练算法的手写体汉字识别器的性能要优于基于传统的Baum-Welch参数估计方法和基于最大互信息准则的HMM参数重估算法的汉字识别器。

To guarantee the color not being contaminated, the automatic clean system was devised based on compressed air or negative pressure. To guarantee the continuity and stability of the supplyinking system, the automatic supplyinking system based on electromagnetic valve and liquid level switch was proposed. To guarantee the continuity and stability of the movement of printed head, velocity blending algorithm was proposed.

采用了基于负压空气为动力的自动清洗系统，以防止颜色不交叉污染；采用基于电磁阀与液位开关控制的自动供墨系统，保证了供墨的连续性和稳定性；采用基于速度矢量混合的加减速算法，保证了喷头移动的平稳和连续。

For the current situation and disadvantages of strain measuring for sheet metal forming,a digital camera based strain measuring system has been set up in this paper.

基于板料应变测量的现状和不足，本文基于数码相机构建了板料应变测量系统，并以图像处理和图像测量的原理为基础，基于C++语言开发了以图像预处理和二值图像的标定和测量为主要模块的板料应变测量软件系统。

Busparallel expansion and pipeline technique are adopted to improve the average inputand output speed of recorder based on FLASH memory. 2 A concept of 'cluster' isintroduced. The using state message of each cluster is loaded in the spare area,following the target datum, to keep the pipeline sequence of multiple clusters' loading, which guarantee the average input speed of system. 3 Based on the using statemessage of every cluster, the Cluster Allocation Table established in memory enablethe system to manage the recorder flexibly in high speed, similar to a file managementsystem. 4 PowerPC 8245 based embedded system, along with Vxworks real-timeoperating system is introduced to make the system more easier to be applied to theprojects in the future.

本文所述的关键技术特点主要包括：采用了并行扩展以及流水线操作技术以提高基于FLASH芯片的存储区平均输入输出能力；引入了&簇&的概念，为了保证连续写入过程中的流水线顺序，系统向存储区加载每一簇有效数据后，紧接着还将向相应簇的空余区中加载该簇的使用状态信息；根据所有簇的使用状态信息在系统内存中建立&簇分配表&，可以支持系统快速灵活地管理存储区，即，类文件化的数据管理；采用基于PowerPC8245的嵌入式计算机硬件系统及基于Vxworks的嵌入式实时操作系统，提高了系统的整体性能及系统研发的延续性。

In this thesis three kinds of piezoelectric transformers are investigated, including circular cylinder piezoelectric transformer of thickness-shear mode, cylindrical thin shell piezoelectric transformer of torsional mode and multi-layered rectangular plate piezoelectric transformer of thickness-twist mode.

本文研究了三种不同结构模态的压电变压器，包括基于厚度剪切模态的圆筒结构压电变压器、基于扭转模态的壳结构压电变压器和基于厚度扭转模态的多层矩形板结构压电变压器。

At last, based on the methods above, a PROFIBUS-based networked motion control prototype system and a CANopen-based networked multi-axes motion control system of shearing machine were realized.

最后，基于上述方法，完成了基于PROFIBUS的网络化运动控制原型系统和基于CANopen的剪板机网络化多轴同步控制系统的开发。

This paper presents a workflow management system based on software agent. It applies an activity-based modeling method and builds formal workflow model. It also puts forward an agent model composed of activity model, intention model, skill model, self-capacity model and companion model to implement workflow management. An agent federation which can be nested is constructed to enhance system flexibility and a shared domain ontology based on workflow is defined to support semantic interoperation among agents.

文章提出了一种基于软件agent的工作流管理系统，采用基于活动的工作流建模方法，建立了形式化的工作流模型，在此基础上，定义了包括活动、意向、技能、自身能力、伙伴等模型的实现工作流运行的agent模型，构建了可嵌套的agent联邦结构，增强了系统的灵活性，并定义了基于工作流的共享领域本体论，支持agent间的语义互操作。

Three new fringe subdivision methods are first proposed opposing to the restrictions of the traditional subdivision methods. They are fringe subdivision method based on self correlation coefficient, fringe subdivision method based on gene algorithm and fringe subdivision method based on Fourier-transform.

本文针对传统软件细分方法的局限性，首次提出了三种新的条纹细分方法：基于自相关系数的条纹细分法、基于遗传算法的条纹细分方法和基于傅立叶变换的条纹细分方法。

Three new median filters are proposed in this paper, such as the effective and non-iterative removal based on the threshold for salt-and-pepper noise from images, non-iterative removal based on the directional information for salt-and-pepper noise from images, an improved anisotropic diffusion based on the median filter.

本文在中值滤波的基础上，提出了三种新的非线性滤波算法，它们是：基于阈值的图像椒盐噪声的非迭代滤除；基于方向信息的图像椒盐噪声的非迭代滤除；改进的基于中值滤波的反扩散。

Recall that, in the Kolmogorov axiomatization, measurable sets are the sets which have a probability or, in other words, the sets corresponding to yes/no questions that have a probabilistic answer.

延期开工的Kolmogorov宣布要衡量所有套职能有限许多坐标限制在于衡量子寅。换句话说，如果是/否的问题回答f可看的价值观念在许多最有限坐标，然后它有一个概率的答案。

The experimental results showed that the algorithm can filter singular points and remain fixity of the target edge.

实验表明：基于模糊理论的图像智能滤波方法比常规图像滤波方法运算量小，它既能去除奇异点，又能保持图像中目标的边缘不变性，具有很好的滤波效果。