企业智能制造系统现状研究

工业4.0时代,智能制造系统在制造企业得到了广泛的应用。然而,出于对智能制造系统的成本和应用效果等多方面因素的考虑,并非所有企业都应用了智能制造系统。因此,对企业智能制造系统运用现状进行了评估。首先,介绍了智能制造系统的组成;其次,阐述了企业智能制造系统变革的意义及面临的挑战;最后,以问卷调查的方式,调研了深圳市100家制造企业智能制造系统的运用情况,并对调研结果进行了分析,结果表明,调研的100家企业当中,有50%以上的企业已开始使用智能制造系统来实施数字化转型,有助于相关人员分析智能制造系统在制造企业的应用现状并提出发展意见。     

基于SOA的家电企业服务型制造平台研究

为转变家电企业生产制造方式,提高家电企业竞争力,构造家电企业服务型制造平台,文章对家电企业服务型制造进行了研究。首先,介绍了服务型制造概念的发展,并归纳了服务型制造模式的典型特点。然后,给出了家电企业服务型制造的运营模式和平台设计。针对采用面向服务的体系结构(service-oriented architecture,SOA)设计实现家电企业的服务型制造平台。     

电磁兼容制造涵义探讨

电气电子产品的电磁兼容性问题很突出,电磁兼容制造也越来越受到重视。然而,电磁兼容制造是一个新的概念,迄今为止,无明确的定义。为此,探讨了电磁兼容制造的涵义、内容、设计与制造的关系、相关制造技术等方面的内容,明晰了电磁兼容制造的内涵及其相关的制造技术,旨在于促进电磁兼容制造技术的发展。     

数字化制造技术

从阐述数字化技术概念出发,综述了国内外数字化制造技术的研究现状,论述了数字化制造技术是先进制造技术的核心技术,并对数字化制造技术的几个核心技术进行了较为详细的介绍,最后对数字化制造技术进行了展望并结合我国实际情况对我国如何发展数字化制造技术提出了几点建议.     

精密电子元器件智能化精益制造平台设计与实现

针对精密电子元器件制造企业产品制造周期管控问题,以制造执行系统为核心,结合精益生产理论,提出了精密电子元器件智能化精益制造平台架构。为了解决制造过程数据采集和集成,设计了制造过程多源数据主动感知模型,同时根据生产排程的特点及需求,提出了基于制造资源能力的动态排程策略。设计开发了针对精密电子元器件制造企业的智能化精益制造平台,并通过在企业的实际应用证明了方案的可行性。     

私有云制造平台的研究与开发

分析了地域性企业集团与中小型企业制造模式,当前制造模式不能满足企业发展需求,企业集团与下属企业或地域内相关企业资源分散、合作不通畅等问题制约了地域经济发展。阐述了面向企业集团的私有云制造平台的服务模式、硬件搭建和平台布局,对比分析私有云制造平台与公有云制造平台的优缺点,对私有云制造平台做了初期规划设计,实现了私有云制造平台的基础架构搭建,并对应用模块做了简单设计。     

无图数字化制造技术探究

无图制造技术即数字化制造技术,钣金零部件的数字化加工制造系统是最近几年提出来的一种新型加工技术,文章充分结合当前机械加工行业的发展趋势和最新动态,从钣金数字化制造的工艺入手,逐一探讨了钣金数字化制造系统模式,从而引出了钣金制造系统模式的设计要素,最后就钣金零部件数字化制造系统做了相应的总结和阐述。     

家电企业云制造服务平台研究

为整合家电企业全生态产业链,提高家电企业竞争力,节省信息化建设费用,构造统一的云制造平台,文章对家电企业云制造服务平台进行了研究。提出了家电企业云制造体系结构以及家电云制造服务管理的生命周期,并介绍了家电云制造平台本体构建方法。     

制造企业的质量管理与控制探析

制造质量直接影响产品质量,使得制造过程是保证产品质量的重要环节。本文阐述了制造质量的内涵定义,对制造质量影响因素进行分析,并提出切实可行的制造质量管理与控制的相关理论,以期望在制造环节中提高制造质量,保证产品质量。     

超声复合激光制造技术研究进展（特邀）

超声复合激光制造技术通过施加外部超声以提升激光制造的加工能力与质量,已成为国内外研究热点。分析了当前超声复合激光制造技术涉及的耦合机理,并综述了超声在激光制造过程中的作用机制。根据超声振动模块与基体的接触模式将超声引入方式划分为固定接触式、移动接触式、非接触式,并分别阐述三种超声引入方式的优势与缺点。进一步,从增材、等材、减材制造三个方面全面讨论了不同超声引入方式和不同激光制造技术相结合的超声复合激光制造技术,探讨了不同复合制造技术的原理和技术特点,归纳了超声振动在激光制造过程中的影响规律。在当前研究进展基础上对超声复合激光制造技术的发展方向进行了展望。     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

电磁兼容检测实验室测试系统相符性比对研究

电磁兼容测试结果与检测实验室可靠性程度直接相关,检测实验室自身质量是保证电磁兼容测试结果准确性先决条件,检测实验室测试系统相符性则成为电磁兼容系统性能评估中需要考虑的关键内容和重要指标。因此,检测实验室测试系统相符性比对是实现电磁兼容系统评估研究的基础工作之一。本文首先针对电磁兼容检测实验室测试系统相符性比对的特点,结合自己几年来的测试实践论述了电磁兼容检测实验室测试系统相符性对比方案,然后提出了具体的案例同时进行了详细的分析,最后总结出了影响电磁兼容检测实验室测试系统相符性因素,整个案例和分析过程及结果可作为电磁兼容检测实验室测试系统相符性比对的手段和依据,具有重要的现实指导意义。     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

Instantaneous envelope and phase extraction from real signals: Theory,implementation, and an application to EEG analysis

This paper presents a unified treatment of various important signal processing techniques for the extraction of the instantaneous envelope and phase of a real signal. These techniques include Complex Demodulation, Hilbert Transformation, In-Phase and In-Quadrature Filtering, Phase-Locked Loop Demodulation, and Peak Amplitude and Zero-Crossing Detection. The salient points in the mathematical theory and implementation of these techniques are outlined, as well as their interrelationships via the theory of analytic signals. The advantages and limitations of each of these techniques are elaborated upon, and Complex Demodulation is shown to be the most effective and flexible method from an implementation point of view. The relation of the above techniques to Fourier spectrum analysis is elucidated, and an example is presented of applying Complex Demodulation for the quantification of time nonstationarities in the electrographic morphology of an EEG waveform.     

Towards Mobile Ubiquitous Service Environment

In this article we present a perspective on future vision of mobile communications and services which is referred to as Mobile Ubiquitous Service Environment (MUSE). Based on analysis of wireless communications and services, we exploit a conceptual model for MUSE via a top-down approach. The conceptual model consists of three major elements: Terminal Service Environment (TSE), Network Service Environment (NSE) and User Identity (UID). The concept of Always the Best Experience (ABE) is addressed as the hinge in design and development such that the user-centric services could be provided automatically and intelligently in the future diverse wireless world Based on these, we further discuss the issues on design and implementation of architecture of future wireless communication system. Requirements for architecture brought by the new features of MUSE are listed. Moreover, we also address several tradeoffs that should be taken into consideration in design. Finally, the deployment challenges for MUSE, such as reflectiveness of system, security and privacy, as well as peer-to-peer AAA are predicted.Ji Yang received PhD degree on Circuit and System, Bachelor degree on Telecommunication Engineering from Beijing University of Posts and Telecommunications (BUPT) in 2002 and 1993 respectively. Currently, he is an associate professor of BUPT, chief technical supervisor of Wireless Technology Innovation Institute, and vice manager of MTlab of Sino-Germany Software Institute. He leads the research on service and application in Future Forum in China. He also made much contribution to the China Communication Standardization Association (CCSA), including the vision of future Mobile Ubiquitous Service Environment, architecture of future B3G mobile terminal, etc. His research interests include architecture design for mobile ubiquitous networks, theory of self-organization, etc.Zhang Ping is now the professor of Beijing University of Posts and Telecommunications and director of Wireless Technology Innovation (WTI) Institute, BUPT. He has also served on the senior member of C3G Group, China MOST 863 future mobile communication FuTURE project, vice-chairman of China FuTURE Forum, and member of Vision Committee of World Wireless Research Forum(WWRF), he was vice chair of WWRF in 2005. He is also invited as the consultants for many domestic and oversea communication companies. He is very active on the international research activity on Beyond 3G area. He also participated in several European projects such as E2R and MOCCA. Until now, he has published 6 books, around 400 publications in journals and conferences in the area of telecommunications. His main research interests are theory and applications in wireless communication area. He was awarded by government, city of Beijing and Ministry of Information Industry several times for his great contribution to the industry and research activity in China.Hu Zheng is a PH.D candidate in mobile communications engineering in Wireless Technology Innovation Institute (WTI) at Beijing University of Posts and Telecommunications (BUPT). He received B.S degree from Nanjing University of Posts and Telecommunications in 2002, majoring in computer communications engineering. He currently works on serivce aspects of mobile ubiquitous communication system with focus on design and performance evaluation of interaction protocols and services in self-organized service environment.Wang Xu received the B.Tech. degree in electronic engineering from Beijing Polytechnic University (now named as Beijing University of Technology), Beijing, China, in 2002. Now he is working for his Ph.D. degree in Wireless Technology Innovation (WTI) Institute, Beijing University of Posts and Telecommunications (BUPT). His current interests include wireless communications in personal area, ad hoc networks and peer-to-peer system.Li Yinong received the BS degree major in Telecommunication Engineering in 1993 from Beijing University of Posts and Telecommunications, the MS degree and PhD degree major in Telecommunication and Electronic System in 1995 and 2003 from the Beijing University of Posts and Telecommunications. He is currently a lecture of STE (School of Telecommunication Engineering) of BUPT. His main research interests include service modeling, service composition approach, and intelligent service. In BUPT, he has given several lectures to both graduate and undergraduate students such as Information Theory, Speech Recognition, Pattern Recognition and Artificial Intelligence.     

Granular Films for Use as Thin-Film Resistors

Abstact  In this paper we discuss thin-film electrical resistors utilizing granular films of the type (Co,Ni)-(Al,Si)-O and their electrical resistive properties. Resistive properties of the granular film resistors drastically change with metal content and after annealing at 450°C. The values of temperature coefficient of resistance (TCR) in the optimum metal content of the granular films were as low as those of conventional metallic alloy film resistors. The values of sheet resistance were much higher than those of conventional metallic alloy resistors. Therefore, granular films are useful for application to thin-film resistors with the goal of miniaturizing them.     

Analysis and evaluation of survivability of various configured communication networks

In this paper a new approach is proposed for analysing and comparatively evaluating communication network survivability under extreme conditions of the network elements. The approach is based not on the probability of network connectivity but on mathematical expectation of the number of survived connections. As the survivability of the network depends on its structural configuration (topology), the present work results in expressions for the calculation of mathematical expectation of the survived part of connections for various network configurations. © 1998 John Wiley & Sons, Ltd.     

印制电路板设计的电磁兼容性分析

阐述了电磁环境日益复杂的情况下,印制电路板电磁兼容性设计在电子产品设计中的必要性,并在分析印制电路板造成信号传输损失、电磁能量辐射形成机理的基础上对印制电路板设计中影响印制线条阻抗的因素、阻抗匹配的重要性和如何控制信号传输线的阻抗,以及印制电路板的地线结构作了分析,从避免印制电路板形成辐射和提高其抗干扰能力的角度阐述了在印制电路板上如何合理布置地线及地线网格、地线面的应用方法,最后分析了印制电路板的布线原则。     

Energy-efficient resource allocation model for device-to-device communication in 5G wireless personal area networks

In general, there are several many devices that can overload the network and reduce performance. Devices can minimize interference and optimize bandwidth usage by using directional antennas and by avoiding overlapping communication ranges. In addition, devices need to carefully manage their use of resources, such as bandwidth and energy. Bandwidth is limited in wireless personal area networks (WPANs), so devices need to carefully select which data to send and receive. In this paper, an intelligent performance analysis of energy-efficient resource optimization model has been proposed for device-to-device (D2D) communication in fifth-generation (5G) WPAN. The proposed energy-efficient resource allocation in D2D communication is important because it helps reduce energy consumption and extend the lifespan of devices that are communicating with each other. By allocating resources in an efficient manner, communication between two devices can be optimized for maximum efficiency. This helps reduce the amount of energy needed to power the communication, as well as the amount of energy needed to power the device that is communicating with another device. Additionally, efficient resource allocation helps reduce the overall cost of communication, as the use of fewer resources results in a lower overall cost. The proposed efficient resource allocation helps reduce the environmental impact of communication, as less energy is used for communication. The proposed energy-efficient resource allocation model (EERAM) has reached 92.97% of energy allocation, 88.72% of power allocation, 87.79% of bandwidth allocation, 87.93% of spectrum allocation, 88.43% of channel allocation, 25.47% of end-to-end delay, 94.33% of network data speed, and 90.99% of network throughput.     

混凝土电子计量中的抗干扰措施

在修建高速公路、桥梁、高层建筑等许多建筑工程中，为了保证建筑质量。多采用混凝土配料控制系统。以保证混凝土的配比。混凝土配料控制系统主要由单片机和电子计量电路构成，在施工工地大型机械和电气设备使用比较普遍，干扰源较多。但混凝土电脑配料控制系统中的电子计量由于信号较弱，易于受到各种电磁干扰。从而影响计量的精度。在研制混凝土控制系统配料的过程中，分析各种干扰产生的原因。针对不同的干扰源采取了不同的抗干扰措施，取得了较好的效果。重点介绍了在混凝土配料控制系统的工作原理和在工作过程中遇到的各种干扰源产生的原因及采取的措施。