人工神经网络在齿轮设计中的应用

针对传统齿轮设计中所存在的大计算量、多图表问题,提出了应用人工神经网络进行映射辩识,以提高计算速度和编程处理能力。通过对具体数据、图表的实际应用表明,人工神经网络方法有效地加快了计算速度,数据的识别精度能够满足计算要求。     

人工神经网络辅助汽车变速箱设计

针对汽车变速箱优化设计中所存在的大计算量、多图表问题,提出应用人工神经网络进行映射辨识.根据BP 网络的在特征识别上的优势,以其为工具,通过算法改进,对设计数据进行应用以提高计算速度和编程处理能力,消除数据的“组合爆炸”现象.对具体数据、图表的实际应用表明,人工神经网络方法能够很好地表达原图表数据关系,使数据应用更加灵活、方便,数据的识别精度能够满足计算要求.     

基于自然语言生成的协同制造企业图表数据分析方法

为充分利用协同制造企业在生产过程中的非结构化图表数据，提出一种基于自然语言生成的图表数据分析方法。首先使用光学字符识别技术和关键点检测网络对图表中的文本信息和数据信息进行识别和提取；随后将用户需求作为输入，通过自然语言生成模型输出相应的图表文本描述，使其可以根据用户不同的意图，生成智能和准确的图表分析结果。该方法图表提取的精度为88.6%,文本描述的评估得分为86.4%。通过在企业的应用案例和相关调研也表明该方法能够根据用户需求对不同类型的图表进行准确的分析。     

一种智能注塑工厂系统设计与应用

在注塑生产过程中,各个辅机和注塑机的状态监控、参数设定和数据记录都会对产品的质量、成本和生产效率有着重要影响.提出一种智能注塑工厂系统应用,能够对注塑车间的生产过程数据进行实时采集和存储,并对这些车间详细制造数据和过程进行报表化和图表化的软硬件解决方案.系统基于Linux平台开发,容易部署,可以根据生产现场的实际情况自定义图表界面,通过多种灵活的方法获取生产现场的实时数据,并将其存储在Mongodb数据库,结合系统自带的专用计算、分析和统计方法,以报告和图表直观反映当前或过去某段时间的生产状况.实验结果表明采用此系统能帮助企业生产部门通过反馈信息做出合理有效的决策,节约了生产成本,提高了生产效率.     

圆柱齿轮减速器传动比分配新方法

通过分析计算,给出了一种新的传动比分配方法,能够合理分配各级传动比,使减速器各级齿轮接触强度安全系数相等,并给出了相应的计算公式、计算方法及传动比分配图表。     

神经模糊系统在双涡轮液力变矩器性能评测中的应用

根据双涡轮液力变矩器性能检测中数据处理和分析的需要，提出应用一种神经模糊算法对试验数据进行辅助分析，以提高计算速度和编程处理能力，减少人为参与次数，实现数据分析处理的自动化。实际应用表明该方法能很好表达原数据关系，数据的识别精度高，能够满足试验测试的要求。     

考虑过载效应的金属材料疲劳裂纹扩展试验数据拟合及疲劳裂纹扩展速度计算方法研究

提出一种拟合金属材料疲劳裂纹扩展试验数据,并计算疲劳裂纹扩展速度的通用方法。该方法采用递增的三次多项式函数拟合疲劳试验数据,并采用平均加权方式计算各局部函数拟合的结果,提高了试验数据的拟合精度和疲劳裂纹扩展速度的准确性。通过在疲劳裂纹长度和扩展速度拟合结果的加权计算过程中引入delta函数,该通用方法能够有效地拟合常幅和存在过载载荷的疲劳裂纹扩展试验数据,并计算各试验点的裂纹扩展速度,同时保证了三次多项式拟合过程的连续性。通过多组常幅和存在过载载荷的疲劳试验数据拟合和现有方法及扩展有限元预测结果的对比分析,验证了该通用方法的有效性。     

数据可视化在航空装备维修保障中的应用探析

为了提升飞机持续适航管理的信息化水平,探究数据可视化技术在航空装备维修保障领域的应用。首先,概述数据可视化技术的相关概念;其次,分析数据可视化技术在航空维修领域的应用场景,并研究维修保障可视化图表和可视化大屏的设计方法;最后,总结航空维修保障及数据可视化技术的发展趋势。研究表明,数据可视化技术能够为装备维修保障提供有力支撑,有助于提升装备管理决策水平。     

机器人立体视觉同步采集技术研究

针对立体对图像采集的同步性问题,提出一种基于DirectShow技术的实时同步采集方法。利用摄像数据流反馈实现左右格式立体对图像的同步采集,构建相应的过滤器图表、过滤器图表管理器,并关联左右两路摄像数据流,实时计算左右摄像图像视差,既满足了帧同步要求又解决了嵌入式方法实现的复杂性。系统试验表明,该方法能够实现双摄像采集的帧同步,不会出现左(右)图像"丢帧或失帧",获取的立体对图像能够满足立体视觉需要。可用于立体场景恢复重建、机器人测距及3D视频获取。     

空压机性能试验结果计算中有关图,表数据的处理

根据 GB3853-83（一般用容积式空气压缩机试验方法）用计算机对空压机的试验结果进行计算时,会遇到诸如空气饱和水蒸汽压力、密度、相对湿度、喷嘴系数等图表的处理问题。目前常用的处理方法有两种〔1,2,3,4〕:其一是用手工在有关图表上查取所需数据,然后输入计算机进行运算;其二是将这些图表给出的离散数据全部存贮到计算机中,再用插值的方法计算出结果。前者简单明了,但手工处理速度太慢,与计算机的高速运算不相协调,在某种意义上说失去了计算机的优越性。后者虽克服了前者的缺点,但需占用计算机的大量内存,从而影响了计算机能力的充分发挥。     

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.