基于决策树的机器人自动爬塔方法

使用爬塔机器人进行铁塔检修维护作业，要求机器人具备高效的自动攀爬能力。提出了一种基于决策树的自动爬塔方法。依据目标铁塔与机械结构分析了机器人攀爬过程中的步态方式，结合控制与感知系统设计了机器人的自动爬塔决策树。决策树运行的关键在于不同环境下步态运动的选择与执行：根据环境模型分析了影响步态选择的主要因素并设计了其量化指标，通过将机器人随机放置在常规铁塔上收集主要因素的样本数据并将此作为条件属性建立决策表，生成步态选择决策树；为了降低任务冗余性提高系统协调能力，在执行步态期间结合运动机构设计视觉调度决策树与绝对高度更新方法，实现步态选择与步态执行的并行处理。室内铁塔攀爬实验表明该方法能够有效地指导机器人的自动爬塔过程。     

用电采集数据分析和智能监测系统中大数据分析的设计研究

对用电信息采集系统和智能监测系统中大数据分析架构进行了探究,通过大数据应用场景分析设计,采用决策树计算方法,实现了对配电网运行工况异常智能诊断和在线监测功能。     

基于数据挖掘的产品概念设计建模研究

在产品概念设计过程中，引入数据挖掘技术和方法，提出了基于数据挖掘的全息虚拟产品概念设计模型，开发了数据挖掘工具，建立了面向产品概念设计方案生成的数据仓库；研究建立决策树算法的数据挖掘模型，以支持度为目标，实现从所建立的机械产品库、设计规则库、领域知识库中挖掘相关数据、信息和知识，从而极大地支持机械产品方案创新设计过程。以机床传动机构设计为例，说明了采用决策树方法的数据挖掘模型来实现机械产品概念设计的功能结构映射过程。     

基于决策树的知识获取方法研究

本文以决策树理论为基础,提出了基于决策树知识获取的方法.该方法充分利用决策树把知识表示与获取融于一身的优点,使知识表示与知识获取同时进行,克服了传统人工智能系统中知识表示与知识获取分离的缺点.     

供应商分类决策树的构造

为了充分挖掘ERP海量数据的价值，运用决策树ID3算法，给出了构造外协供应商加工能力决策树的完事过程。同时提出了一种修剪决策树的方法。     

基于数据挖掘的机构设计知识库建立及求解

分析了机构设计特点、步骤及设计知识构成,提出了基于数据挖掘原理的多维立方体数据模型及形成的知识库;该知识库根据功能分析法由实体层、方法层及创新工具库组成,便于查询,利于创新方案的生成;介绍了求解知识库的数据挖掘系统的组成及决策树算法;最后以一设计实例说明了知识库求解的过程。     

支持产品设计的知识仓库框架研究

为满足产品快速定制设计过程对知识的配置、组织、获取和重用的要求，构建了基于知识仓库的知识管理框架。在对产品信息模型的定义基础上构建了由产品需求决策知识、产品结构知识、产品配置知识、产品特征知识和产品设计资源组成的知识仓库知识结构，并且将机器学习中的决策树和加权聚类算法用于知识推理和设计决策过程中，将Web Service技术运用于异构CAD系统和知识仓库数据交换，
实现了基于异构CAD平台的分布式知识共享和应用集成。     

决策树在发动机试车数据库数据挖掘中的应用

如何正确的对缺失数据进行填充是数据挖掘预处理过程中的一个重要问题。这里给出了一种基于决策树来解决此问题的算法。该算法应用改进的ID3算法来构造决策树，利用决策规则对缺失值进行补充。在构造决策树之前，采用属性约简技术得出条件属性集，使得决策树简单，并且计算速度得到提高。此算法应用在某型发动机试车数据库中，被证明是可行的、高效的。     

一种基于决策树的飞机级故障诊断建模方法研究

现代飞机是由许多子系统组成的复杂系统，系统结构层次多，关联度高，故障之间存在横向和纵向传播性。因此，在健康管理技术实施过程中，应最大程度利用故障特征监测技术，并借助各种算法和智能模型来监控、诊断、预测和管理飞机的运行状态。鉴于此，将机器学习中的决策树算法应用到故障诊断技术中，建立了复杂的数学模型，提出了一种基于飞机状态参数构成的决策树的飞机级故障诊断建模方法，对飞机健康管理应用的发展具有一定的参考意义，有利于健康管理系统朝着更加综合化、智能化、网络化和标准化的方向发展。     

基于粗糙集的产品色彩意象规则挖掘

为挖掘消费者对产品色彩意象认知的规则,将粗糙集理论运用到产品色彩意象方案的设计中。通过意象等级及设计要素生成分辩矩阵,对矩阵进行属性约简,去除冗余属性,获取产品色彩核心的设计要素;通过CAAI算法对各设计要素进行重要度排序,并进行信息增益计算,建立决策树,从决策树中提取到目标产品的色彩意象规则;以加湿器的色彩方案为例,验证了该方法的有效性。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.