提高锅炉智能化安全节能运行的方法探析

锅炉设备要做到安全节能方面的优化,必须不断进行智能化升级,并在锅炉的操作和管理中充分发挥其特点。因此,概述锅炉智能化节能的概念及现状,分析锅炉智能化安全节能运行存在的问题及相应对策,并以燃气锅炉智能化安全节能需求为例做出简要的阐述。     

基于PLC的大型公共建筑电气智能化系统设计分析

近年来,我国科学技术的发展极快,基于各式各样的新兴技术,各种以PLC系统为核心的大型公共建筑电气智能化系统,在我国建筑领域的应用日益广泛。此类以PLC控制系统为核心的智能电气化系统的应用,能够有效提高大型公共建筑的实用性能,完善功能模块,优化建筑内空间及环境。基于此,本文对建筑电气智能化做出了简要描述,分析了大型公共建筑电气智能化系统的设计现状,对PLC控制系统在该领域的设计重点、设计方式做出了研究,以供同行参考。     

CPS系统的构建及在实际加工中的应用

基于数控机床的赛博物理系统(CPS)是智能化加工的重要基石。参照经典的CPS五层结构,以数控机床为载体,整合软硬件资源,构建了数控机床的赛博物理系统,并进一步探索了其在实际加工中的应用场景。实验结果证明:利用该系统可以实现加工过程的智能化分析、自适应加工,其中的自适应加工可缩短单工序加工时间26.5%。构建的CPS系统有助于提高加工效率,改善加工过程,对智能化制造的实现做出了有益探索。     

单片机在电子技术中的应用

随着科学技术的不断发展,作为现代科学技术的重要分支电子技术也取得了长足进步,电子技术为人类社会的发展做出了卓越的贡献,在人类的各种重要产业中占据了重要地位。而随着人类社会经济的不断变革,对电子技术的要求也越来越高,当下社会对于各类机械工具的要求逐渐趋向自动化和智能化,作为智能化和自动化的关键元件,单片机在电子技术中的各式应用显得尤为重要。单片机作为一种典型的嵌入式系统,近年来,愈发显示出其在电子器件的自动化和智能化方面的优势。本文从单片机的本身结构出发,着重讨论了单片机在电子技术中的应用,并对其进行了一定分析。     

塔吊智能化管理系统的应用

随着城市化建设在我国的全面实施,加剧了密集型作业的开展。人们将物量网技术与人工智能技术加以结合,产生了全新的人工智能,并且能够使建筑行业的发展得到进一步的提升,塔式起重机(下文简称塔吊)智能化管理系统,有效采用了人工智能中的无人驾驶汽车的环境感知以及导航定位技术,带给塔吊工作极大的便利。本文对常见的塔吊安全问题进行了分析,介绍了塔吊智能化管理系统的应用,并对其未来的发展做出了预测,以供参考。     

工厂智能化

通过工厂智能化,生产商可以追溯他们的生产过程,增强其商业信息在所有层面的沟通,使雇员可以做出更好的决策并更有效地完成他们的任务。     

物联网将加快推进制造业“两化”深度融合

物联网在制造业的"两化融合"可以从四个角度来进行理解:生产自动化,产品智能化,管理精细化,产业先进化。物联网是新一代信息技术的重要组成部分,其特征是通过传感器等方式获取物理世界的各种信息,从而提升对物理世界的感知能力,实现智能化的决策和控制。我国政府对物联网发展给予了高度重视。早在1999年中国科学院就开始研究传感网;2009年,温家宝总理做出指示,要在无锡建立中国的"感     

智能化技术在电气工程自动化控制中的应用研究

智能化技术的运用是实现高水平工业制造的"决胜点",将其应用于电气工程,有助于提升自动化控制的效率和质量,解决传统工作模式下设备发生故障后无法即刻做出响应,致使工作延迟和滞后等一系列问题。本文在概述智能化技术的基础上,从设备运用、控制管理、设计方法以及故障诊断等方面就其具体应用一一作了阐释。     

智能挖掘机器人控制系统的研究

智能化挖掘机器人适合于在复杂的环境中工作,其目标是在无需对环境做任何规定和改变的条件下,利用双目立体视觉系统识别作业对象物和对工作环境的实时监控,自主地做出各种决策,有目的地移动和完成相应任务,实现在无人驾驶情况下的自主作业.     

机械设备的智能化设计

本文简述机械设备智能化设计的意义,提出机械设备在智能化设计时的设计需求,并进一步探讨机械设备的智能化设计及其在未来发展的趋势,旨在为机械设备能够更快、更好地投入生产,为我国经济的发展做出贡献。     

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...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

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.     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

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.