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The main theory results includes:(1) Using the properties of Hilbert transform, perfectly reconstruction and new type of lifting scheme, a new type of dual-tree binary coefficients complex wavelet with linear phase is achieved.(2) For linear systems that can be diagonalized by GFT and DST-II matrices, an efficient MGM method is proposed, convergence is proved.(3) We discuss the algebraic structure when Toeplitz matrix is transformed by multi-band wavelet,show that Toeplitz matrix is composed of generating function is transformed to a band and sparse matrix when wavelet applied to this matrix, based on the above results, an efficient solution of Toeplitz equations is obtained, and the computational complex is O,where N is the order of matrix.

理论成果主要包括:(1)对于对偶树二进制系数复数小波,利用Hilbert变换对性质、完全重构条件并结合新的提升格式构造研究了含参系数多进制小波构造方法,作为特例得到具有线性相位的对偶树二进制系数复数小波构造方法;(2)对于广义离散傅立叶变换与正弦变换对角化系统,提出了高效、快速的多重网格算法,理论上证明了算法的收敛性;(3)研究了Toeplitz矩阵在多进制小波变换下的代数结构,验证了多项式生成函数构成的Toeplitz系统在小波变换下的稀疏带宽性质,从而建立基于小波变换求解Toeplitz系统的快速求解方法,运算量级控制在O,其中N为系统的阶。

The logic structure and main components of RCC are described and some key technologies are discussed, such as, the separation of compiler's fore-end and back-end, interface definition between the fore-end and back-end, the definition of instruction system of the virtual machine.

论文首先介绍了RCC编译系统的结构和组成部分,研究了可重定向编译系统中涉及到的几个关键技术:编译系统前后端的划分、虚拟机指令系统定义、前后端接口描述、指令映射和选择树语法及树分析算法。

Moreover, for the treelike system with prescribed motion and the non-treelike system with closed-loop, the generalized coordinates aren't independent completely. Only the dynamical equations of the system and the constrain equations resulting from the prescribed motion and the closed-loop are combined to form DAEs, it can be solved.

另外,对于有指定运动的树系统或带有闭环的非树系统,系统的广义坐标是不完全独立的,系统的动力学方程要与指定运动或系统切断所附加的约束方程一起组成微分--代数方程组才能求解。

The information integrated pattern based on PDM/PLM in the course ofmanufacture is put forward. Under the constraints of building CAPP platform, thearchitecture of CAPP platform is established. The models of decision making andfunction for process planning are given. Then the development means of CAPP basedSmarTeam are extracted.3. The structure of modular product life cycle is established. Toward the divisionand planning of the General Modules oriented product family, theCAD/CAPP integrated model of flexible module based on feature and CAD/CAPPmapping model based on process planning match board are set up. The keytechnologies of Solidworks/SmarTeam/CAPP integration are studies.4. From the point of view of process match board and step match board, theprocess of creating to process planning match board is studied. As an example, themachining process planning of up beam of hydraulic press machines is used tointroduce the establishment of process planning match board by means of inferencebased on expert knowledge. The organize model about the process planning matchboard oriented product family is brought forward.5. The multi-decision methods of CAPP system based on analytic hierarchy aregiven.. On the basis of uniform data model, the sub-machining process planning ofpart is auto-created by means of analytic hierarchy, The step decision methods basedon AHP is put forward.6. For the design/manufacture information in the course of product life cycle, thetree structure based on Object-Oriented and static model based UML are founded. Themethod of establishing design/manufacture information management system isbrought forward. The commercial PLM software—SmarTeam is regarded asdevelopment platform, on basis of which, the design/manufacture informationmanagement system is built, and the multi-view mapping technique ofdesign/manufacture information model is studies.7. A computer-aided CAPP platform based on PDM/PLM is founded, and itsstructure, function, work flow is illustrated. Some example of the system areintroduced.

阐述课题提出的目的和意义,明确了本文研究的主要内容。2、提出基于PDM/PLM的制造过程信息化集成模式;在平台式CAPP系统的设计约束模型基础上,构建了平台式CAPP系统的体系结构;并给出工艺决策模型和功能模型;最后提出基于SmarTeam的CAPP开发模式和实现策略。3、建立模块化产品生命周期模型的组织结构;针对面向产品族的广义模块的划分和规划方法,建立基于特征的柔性模块CAD/CAPP集成模型及基于工艺模板的CAD/CAPP映射模型;研究Solidworks/SmarTeam/CAPP集成的关键技术。4、从工序模板和工步模板的角度研究了工艺模板的创建过程;以液压机上梁模块机加工为例,采用基于专家知识的推理技术实现了工艺模板的创成;提出了面向产品族的工艺模板分层结构树的组织模式。5、提出基于分层规划的多模式工艺决策流程;在统一数据模型的基础上,从特征层和零件层分层规划,实现了零件加工子工艺的自动创成;提出基于AHP的工步排序决策方法。6、针对产品生命周期中的设计/制造信息,建立了面向对象的类树结构和基于UML的静态结构模型;提出基于PDM/PLM软件的设计/制造信息管理系统的构建方法;以商品化PLM软件SmarTeam作为开发平台,开发了基于SmarTeam的设计/制造信息管理原型系统;研究设计/制造信息模型多视图映射机制。7、开发了基于PDM/PLM的平台式CAPP原型系统,构建了系统的功能模型,并对系统的主要功能进行说明,给出系统的运行实例。

In the paper, the importance of FTA is described, the quantitative analysis method of the FTA is introduced in detail. Then the paper takes a vehicle control system as the research object, expatiates the forming of the CPU board fault tree, the establishing of the mean event fault tree and the obtaining of the mean event fault probability, and realizes the element level fault orientation on the CPU board of the vehicle control system. The test indicates that the method is both valid and correct.

文章在介绍故障树分析法重要性的基础上,较详细地介绍了FTA的定量分析法,并以某车辆控制系统为研究对象,从CPU板故障树的构建、各中间事件故障树的建立和各子事件故障概率等方面出发,实现了车辆控制系统CPU板元件级的故障定位,实验表明了该方法的有效性和正确性。

Based on the fault tree of the cooling water system in asphalt gas decontaminating for carbon calciner,quantified evaluating system of reliability of cooling water system is set up by using of quantified analysis theory of fault tree.

在建立焙烧炉沥青烟气净化系统中冷却水系统故障树的基础上,运用故障树定量分析理论,建立了冷却水系统可靠性定量评价体系,对该系统发生故障的概率作出判断,从而能够及时、合理地确定冷却水系统的状况,以便及时采取应变措施,保持系统可靠运行

Lastly, based on analysis on phylogentic relationships among 39 ciliates combined with their main morphologic characters, some conclusion were drawn: 1 the monophyly of the peritrichs was strongly supported, and its subclass rank in the class Oligohymenophorea is reasonable; 2 the genus Epistylis might not be monophyletic, and the peristomial area, especially the peristomial lip, might be an important phylogenetic character within the genus Epistylis; 3 the taxonomic rank of the genus Carchesium and the genus Campanella were suggested to be adjusted; 4 Opisthonecta probably diverged from peritrichs with stalks; 5 the phylogenetic tree of peritrichs was reconstructed based on the molecular information inferred from SSrRNA gene sequences and the morphology.

测定了6科8属13种缘毛类纤毛虫的SSrDNA序列,将构建的最大简约树和邻接树与形态学相结合,分析得出:1)缘毛类纤毛虫是单系的,其分类地位是隶属于纤毛门寡膜纲缘毛亚纲:2)指出累枝虫属可能不是单系的,口围区是累枝虫属中重要的系统发育特征;3)建议调整独缩虫和聚钟虫属的分类地位;4)得出后游虫可能是由有柄缘毛类进化而来的类群;5)基于缘毛类反口区结构和SSrRNA基因序列提供的信息重建了缘毛类纤毛虫的系统发育树。

At last, aimed at the stochastic system in which the uniform target at the same periods is observed by sensors possessing different characters at multiple scales, we present a method of the multiscale representation based on unregular tree. We develop the multiscale stochastic model based on scale sequence at odd- and even-numbered scale and on different order trees.

针对不同尺度上具有不同特性的传感器在相同周期内对同一目标观测的动态系统,给出了一类系统基于不规则树结构的多尺度表示方法,并建立了基于尺度序列奇偶相间阶树、不同阶树的多尺度动态模型。

Secondly, in spite of the reliability of software and control system, the mechanical system reliability of automatic yarn evenness tester is researched using FTA, and fault trees of each unit and system are established by analyzing its structure and function. According to system reliability theory and events probability, the mechanical system fault tree is analyzed by means of qualitative analysis and quantitative calculation, the system weak parts are found , and the ways are put forward to improve the mechanical system reliability.

其次,在不考虑软件及控制系统可靠性的情况下,利用故障树分析的方法,对全自动条干仪机械系统可靠性进行了分析研究,通过对其结构、功能的分析,建立了单个单元的故障树和系统的故障树;并根据系统可靠性的原理和事件发生的概率,进行了定性分析和定量计算,找出了系统的薄弱环节,提出了提高机械系统可靠性的途径。

First, it diagnoses and analyses the maglev train's suspension system and traction system by applying the FTA and fuzzy FTA method. Furthermore, it presents the new way to solute the diagnosis searching arithmetic by building the searching matrix based on the factors such as components' key weightiness, faults happen probability, searching cost. Then it can get optimal searching sequence for seeking the reason to the faults. Second, it builds the train's rank evaluation model based on multiple hiberarchy neural networks, after it takes the strategy that set the component diagnosis and whole train fault rank evaluation into two steps. Third, it deeply analyses reliability of the maglev train's power system with function-correlated feature, by the method that combining the FTA with the Markov model. Finally aiming at maintenance ahead of the fault, it proposes the blue print for the maglev train's maintenance. What's more, it introduces the design and realization to recorder for the train run data in detail.

应用故障树和模糊故障树分析法对磁浮列车悬浮系统、牵引系统进行全面的诊断分析,提出了以部件关键重要度、故障概率、搜索代价为因素,建立搜索决策矩阵,综合排序的搜索算法;采取部件诊断和列车集中评估相结合的分层诊断策略,建立基于多重神经网络的列车故障等级评估模型;结合故障树和马尔可夫模型对具有功能相关特性的列车电源系统进行可靠性分析;着眼事前维修,提出了列车运行维护方案,并设计实现了列车运行数据记录器。

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。