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机车检修工装设备监控网络系统探讨
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作者 沈小嵩 《上海铁道科技》 2010年第1期60-61,共2页
对机车检修工装设备监控网络系统的结构和设计进行了分析探讨,开发了机车检修工装设备的网络监控系统。
关键词 机务 工装设备 监控系 统网络
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中波广播发射机统调网络自动化调整系统的设计与实现 被引量:1
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作者 张晗 《西部广播电视》 2019年第17期238-239,241,共3页
目的:统调网络中电容、电感等器件的参数,会受天气环境影响,产生一定程度的变化;现今各发射台站多为一塔多频,器件较多,这些器件参数的变化会导致统调网络阻抗与发射机阻抗不匹配,从而导致发射机功率下降,甚至不能正常发射。对此,本文... 目的:统调网络中电容、电感等器件的参数,会受天气环境影响,产生一定程度的变化;现今各发射台站多为一塔多频,器件较多,这些器件参数的变化会导致统调网络阻抗与发射机阻抗不匹配,从而导致发射机功率下降,甚至不能正常发射。对此,本文对中波广播发射机统调网络自动化调整系统的设计与实现进行探讨。方法:采用单片机对步进电机进行控制,通过步进电机带动阻隔材料对内部磁通量进行阻隔,进而达到改变电感值的目的,以实现对统调网络的调整;结论:本文以单片机为控制核心,设计了统调网络自动化调整系统,实时自动调整匹配阻抗,使发射机始终保持高效率发射状态,减少了人为调整统调网络次数。 展开更多
关键词 网络 阻抗匹配 自动化 单片机
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水利工程质量检测智能网络监控系统研究 被引量:1
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作者 喻鑫 夏玉 《科学技术创新》 2020年第23期112-113,共2页
在水利工程中质量检测属于工作的重要环节,近年来在这方面工作中相关智能化技术的应用更是进入了一个新的阶段,对此,阐述了水利工程质量检测工作的内容,并对其工作开展的现状问题进行了分析,以大坝水利安全监测系统的应用为例探讨了智... 在水利工程中质量检测属于工作的重要环节,近年来在这方面工作中相关智能化技术的应用更是进入了一个新的阶段,对此,阐述了水利工程质量检测工作的内容,并对其工作开展的现状问题进行了分析,以大坝水利安全监测系统的应用为例探讨了智能化网络监控体系在水利工程检测工作中的应用。 展开更多
关键词 水利工程 质量检测 智能网络监控体系
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AB系统的工业网络通信--EtherNet/IP网络
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作者 张晓友 《今日自动化》 2021年第5期57-59,共3页
随着现代信息技术和计算机技术的不断发展,分布式控制系统在企业自动化和过程自动化中应用迅速增长,现场总线技术已成为工业网络通信中的佼佼者。网络通信方式的多样化和通信效率的提高,使信息交换领域从现场设备控制层发展到企业管理层... 随着现代信息技术和计算机技术的不断发展,分布式控制系统在企业自动化和过程自动化中应用迅速增长,现场总线技术已成为工业网络通信中的佼佼者。网络通信方式的多样化和通信效率的提高,使信息交换领域从现场设备控制层发展到企业管理层,以网络为主的自动化分布式控制系统成为行业趋势。 展开更多
关键词 网络通信 网络协议 网络链接 IP地址设定
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企业网络营销应用障碍及网络营销体系构建研究——以甘肃省为例 被引量:7
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作者 哈金芳 《生产力研究》 2013年第7期154-156,176,共4页
自20世纪90年代网络营销作为一种兼顾成本和效果的新型营销手段被一些企业加以利用以来,已见效显著。然而,绝大多数企业不得其法。甘肃企业对网络营销认识水平和应用能力更显不足。文章通过对甘肃省网络营销基础资源状况及甘肃企业网络... 自20世纪90年代网络营销作为一种兼顾成本和效果的新型营销手段被一些企业加以利用以来,已见效显著。然而,绝大多数企业不得其法。甘肃企业对网络营销认识水平和应用能力更显不足。文章通过对甘肃省网络营销基础资源状况及甘肃企业网络营销应用现状的调查,分析了企业推行网络营销的障碍因素,并提出构建企业网络营销体系的构想。 展开更多
关键词 网络平台 物流体系 人才库 网络营销体系
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公交网络中心化及节点重要度评估研究 被引量:2
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作者 蒋雄 胡德欢 《市政技术》 2014年第3期28-31,共4页
探索相对重要和中心化节点已成为复杂网络学科中数据挖掘的基本问题。城市公交网络是一种典型的复杂网络,研究公交网络拓扑结构,定量分析和评估其网络的中心化与节点重要度,可以指导公交网络的合理规划和优化调整。文章基于复杂网络理... 探索相对重要和中心化节点已成为复杂网络学科中数据挖掘的基本问题。城市公交网络是一种典型的复杂网络,研究公交网络拓扑结构,定量分析和评估其网络的中心化与节点重要度,可以指导公交网络的合理规划和优化调整。文章基于复杂网络理论及特征模型,重新定义了节点在网络中的重要度,同时设计了网络中心化和评估节点重要度的算法。通过仿真试验表明了该算法在计算精度和速度上的优越性,验证了算法准确性和有效性。 展开更多
关键词 复杂网络 公交网络 中心化 重要度
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电信网络体系的演变
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作者 邬贺铨 《电信建设》 2001年第2期2-7,共6页
从数据业务量将要超过电话业务量、移 动通信用户数将要超过固定电话用户数这一趋 势出发,引出宽带化是传输节点和业务节点发 展的方向;在向下一代网络发展的过程中,网 络体系结构在分层和分割方面将要发生的演变。
关键词 电信网 网络体系 通信网
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网络融合下的光通信技术分析
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作者 欧阳沄霏 《通信电源技术》 2021年第10期92-94,共3页
目前,我国网络在现代社会的持续完善下,整体结构、作用价值以及使用性能越发理想,各个网络也开始出现融合趋势,这种趋势对于光通信技术而言,属于持续发展的主要动力。基于此,在介绍了网络融合与光通信技术的基础概念后,分析了网络融合... 目前,我国网络在现代社会的持续完善下,整体结构、作用价值以及使用性能越发理想,各个网络也开始出现融合趋势,这种趋势对于光通信技术而言,属于持续发展的主要动力。基于此,在介绍了网络融合与光通信技术的基础概念后,分析了网络融合趋势下光通信技术的发展趋势,继而以NGN为例,探究其在网络融合趋势下的具体融合。 展开更多
关键词 网络 光通信技术 具体分析
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论P2P引发的版权侵权责任认定 被引量:2
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作者 任秋娟 马瑛杰 《山东法官培训学院学报》 2006年第3期90-94,共5页
关键词 版权侵权 网络用户 中心服务器 上传文件 互联网 资源 主导地位 直接连接 运算能力 双重身份 节点 交换文件 技术 对等网络 统网络 客户端 计算机 端对端 点对点 英文
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Prediction Model of Dissolved Oxygen Fuzzy System in Aquaculture Pond Based on Neural Network 被引量:4
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作者 王瑞梅 傅泽田 何有缘 《Agricultural Science & Technology》 CAS 2010年第8期14-18,共5页
A dissolved oxygen fuzzy system predicting model based on neural network was put forward in this study. 106 groups of data were used to confirm the fitness of the predicting model. The first 80 groups of data were act... A dissolved oxygen fuzzy system predicting model based on neural network was put forward in this study. 106 groups of data were used to confirm the fitness of the predicting model. The first 80 groups of data were acted as training input and the other 26 groups of data were acted as the confirmed data in the system. The result showed that the testing data was approximately the same as the predicted data. So it gave a new way to solve the problem that the status of the water quality couldn't be predicted in time and it's hard to watching and measuring the factors dynamic. 展开更多
关键词 Aquaculture pond Dissolved oxygen Fuzzy system Neural network
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NEURAL NETWORK SMITH PREDICTIVE CONTROL FOR TELEROBOTS WITH TIME DELAY 被引量:3
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作者 黄金泉 徐亮 Frank L Lewis 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2001年第1期35-40,共6页
A neural network Smith predictive control strategy is proposed to deal with inpu t and feedback time delays in telerobot systems. The delay time is assumed to b e invariant and unknown. The proposed control structure... A neural network Smith predictive control strategy is proposed to deal with inpu t and feedback time delays in telerobot systems. The delay time is assumed to b e invariant and unknown. The proposed control structure consists of a slave syst em and a master controller. In the slave system, a recurrent neural network (RNN ) with on-line weight tuning algorithm is employed to approximate the dynamics of the time-delay-free nonlinear plant, which is used to linearize the slave s ystem. The master controller is a Smith predictor for the linearized slave syste m, which provides prediction and maintains the desirable tracking performance. S tability propriety is guaranteed based on the Lyapunov method. A simulation of a two-link robotic manipulator is provided to illustrate the effectiveness of th e proposed control strategy. 展开更多
关键词 TELEROBOT time delay s ystem neural networks Smith predictor
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Holographic alloy positioning design system and holographic network phase diagrams of Au-Cu system 被引量:3
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作者 谢佑卿 刘心笔 +2 位作者 李小波 彭红建 聂耀庄 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第3期885-906,共22页
Taking Au?Cu system as an example, three discoveries and two methods were presented. First, a new way for boosting sustainable progress of systematic metal materials science (SMMS) and alloy gene engineering (AGE) is ... Taking Au?Cu system as an example, three discoveries and two methods were presented. First, a new way for boosting sustainable progress of systematic metal materials science (SMMS) and alloy gene engineering (AGE) is to establish holographic alloy positioning design (HAPD) system, of which the base consists of measurement and calculation center, SMMS center, AGE center, HAPD information center and HAPD cybernation center; Second, the resonance activating-sychro alternating mechanism of atom movement may be divided into the located and oriented diffuse modes; Third, the equilibrium and subequilibrium holographic network phase diagrams are blueprints and operable platform for researchers to discover, design, manufacture and deploy advanced alloys, which are obtained respectively by the equilibrium lever numerical method and cross point numerical method of isothermal Gibbs energy curves. As clicking each network point, the holographic information of three structure levels for the designed alloy may be readily obtained: the phase constitution and fraction, phase arranging structure and properties of organization; the composition, alloy gene arranging structure and properties of each phase and the electronic structures and properties of alloy genes. It will create a new era for network designing advanced alloys. 展开更多
关键词 Au-Cu system holographic alloy positioning design system equilibrium and subequilibrium holographic network phase diagrams systematic metal materials science network designing advanced alloys
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Application of neural network merging model in dam deformation analysis 被引量:5
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作者 张帆 胡伍生 《Journal of Southeast University(English Edition)》 EI CAS 2013年第4期441-444,共4页
In order to improve the prediction accuracy and test the generalization ability of the dam deformation analysis model, the back-propagation(BP) neural network model for dam deformation analysis is studied, and the m... In order to improve the prediction accuracy and test the generalization ability of the dam deformation analysis model, the back-propagation(BP) neural network model for dam deformation analysis is studied, and the merging model is built based on the neural network BP algorithm and the traditional statistical model. The three models mentioned above are calculated and analyzed according to the long-term deformation observation data in Chencun Dam. The analytical results show that the average prediction accuracies of the statistical model and the BP neural network model are ~ 0.477 and +- 0.390 mm, respectively, while the prediction accuracy of the merging model is ~0. 318 mm, which is improved by 33% and 18% compared to the other two models, respectively. And the merging model has a better generalization ability and broad applicability. 展开更多
关键词 dam deformation analysis neural network statistical model merging model
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Effect of quality uncertainty of parts on performance of reprocessing system in remanufacturing environment 被引量:5
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作者 汤希峰 毛海军 李旭宏 《Journal of Southeast University(English Edition)》 EI CAS 2011年第1期92-95,共4页
Aimed at the problem of stochastic routings for reprocessing operations and highly variable processing times,an open queuing network is utilized to model a typical reprocessing system.In the model,each server is subje... Aimed at the problem of stochastic routings for reprocessing operations and highly variable processing times,an open queuing network is utilized to model a typical reprocessing system.In the model,each server is subject to breakdown and has a finite buffer capacity,while repair times,breakdown times and service time follow an exponential distribution.Based on the decomposition principle and the expansion methodology,an approximation analytical algorithm is proposed to calculate the mean reprocessing time,the throughput of each server and other parameters of the processing system.Then an approach to determining the quality of disassembled parts is suggested,on the basis of which the effect of parts quality on the performance of the reprocessing system is investigated.Numerical examples show that there is a negative correlation between quality of parts and their mean reprocessing time.Furthermore,marginal reprocessing time of the parts decrease with the drop in their quality. 展开更多
关键词 REMANUFACTURING UNCERTAINTY reprocessing system open queuing network
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Home control system based on ZigBee wireless sensor networks 被引量:6
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作者 丁飞 宋光明 +1 位作者 李建清 宋爱国 《Journal of Southeast University(English Edition)》 EI CAS 2008年第4期420-423,共4页
A new scheme of the home control system based on ZigBee wireless sensor networks is presented. The design and development of the software and hardware of the proposed system are given. In addition to the basic data ac... A new scheme of the home control system based on ZigBee wireless sensor networks is presented. The design and development of the software and hardware of the proposed system are given. In addition to the basic data acquisition and processing functions, the gateway supports the Bluetooth-based local interface and the general packet radio service (GPRS)-based remote interface. Users on the client service side can use a pocket PC or notebook PC to achieve real-time data acquisition and control instruction implementation, or remotely control the home control system through a mobile phone by sending a short message. The Labview graphical development environment is adopted to create PDA applications running on pocket PCs and monitoring platform established on notebook PCs. Except for the gateway, other nodes in the system work in sleep mode most of the time on the system, and thus it improves the lifetime of the whole system efficiently. 展开更多
关键词 home control system ZIGBEE wireless sensor networks pocket PC LABVIEW
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Approximation Property of the Modified Elman Network 被引量:5
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作者 任雪梅 陈杰 +1 位作者 龚至豪 窦丽华 《Journal of Beijing Institute of Technology》 EI CAS 2002年第1期19-23,共5页
A new type of recurrent neural network is discussed, which provides the potential for modelling unknown nonlinear systems. The proposed network is a generalization of the network described by Elman, which has three la... A new type of recurrent neural network is discussed, which provides the potential for modelling unknown nonlinear systems. The proposed network is a generalization of the network described by Elman, which has three layers including the input layer, the hidden layer and the output layer. The input layer is composed of two different groups of neurons, the group of external input neurons and the group of the internal context neurons. Since arbitrary connections can be allowed from the hidden layer to the context layer, the modified Elman network has more memory space to represent dynamic systems than the Elman network. In addition, it is proved that the proposed network with appropriate neurons in the context layer can approximate the trajectory of a given dynamical system for any fixed finite length of time. The dynamic backpropagation algorithm is used to estimate the weights of both the feedforward and feedback connections. The methods have been successfully applied to the modelling of nonlinear plants. 展开更多
关键词 nonlinear systems Elman network dynamic backpropagation algorithm MODELLING
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Modeling of temperature-humidity for wood drying based on time-delay neural network 被引量:5
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作者 张冬妍 孙丽萍 曹军 《Journal of Forestry Research》 SCIE CAS CSCD 2006年第2期141-144,共4页
The temperature-humidity models of wood drying were developed based on Time-delay neural network and the identification structures of Time-delay neural network were given. The controlling model and the schedule model,... The temperature-humidity models of wood drying were developed based on Time-delay neural network and the identification structures of Time-delay neural network were given. The controlling model and the schedule model, which revealed the relation between controlling signal and temperature-humidity and the relation between wood moisture content and temperature-humidity of wood drying, were separately presented. The models were simulated by using the measured data of the experimental drying kiln. The numerical simulation results showed that the modeling method was feasible, and the models were effective. 展开更多
关键词 Wood drying Temperature-humidity model System identification Time-Delay neural network
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ANALYSIS ON GRAY NODES AND GRAYNESS DEGREE IN COMPLEX NETWORK 被引量:1
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作者 崔博 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2012年第2期125-130,共6页
Based on the theory of complex network and gray system, the sugesstion that there exist two types of gray nodes in complex networks, Gray Node I and Gray Node II, is concluded. The first one refers to the existent unk... Based on the theory of complex network and gray system, the sugesstion that there exist two types of gray nodes in complex networks, Gray Node I and Gray Node II, is concluded. The first one refers to the existent unknown gray nodes, and the second the evolution gray nodes. The relevant definitions are also given. Further- more, grayness degree in complex networks is described and divided into two forms--the relative grayness degree (RGD) and the absolute grayness degree (AGD), which are proved respectively. 展开更多
关键词 gray system complex network gray nodes grayness degree
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DOI:搭建信息资源的桥梁 被引量:1
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作者 宋济范 《生殖医学杂志》 CAS 2012年第1期72-72,共1页
数字对象唯一标识(digital objecti dentifier,DOI)被形象地称为“英特网上的条形码”,如同贴了标签的商品,数字对象一旦被分配一个DOI号,无论它处于英特网上的任何位置,通过DOI都能够找到它,因此解决了传统网络标识系统的不稳... 数字对象唯一标识(digital objecti dentifier,DOI)被形象地称为“英特网上的条形码”,如同贴了标签的商品,数字对象一旦被分配一个DOI号,无论它处于英特网上的任何位置,通过DOI都能够找到它,因此解决了传统网络标识系统的不稳定性,实现了更有效的网络链接。DOI技术即将成为国际上数字出版界构建数字信息交换平台的首要选择。 展开更多
关键词 信息资源 英特网 统网络标识系 网络链接 DOI技术
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Tightly-coupled model for INS/WSN integrated navigation based on Kalman filter 被引量:2
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作者 徐元 陈熙源 《Journal of Southeast University(English Edition)》 EI CAS 2011年第4期384-387,共4页
Aiming at the problem of poor observability of measurement information in the loosely-coupled integration of the inertial navigation system (INS) and the wireless sensor network (WSN), this paper presents a tightl... Aiming at the problem of poor observability of measurement information in the loosely-coupled integration of the inertial navigation system (INS) and the wireless sensor network (WSN), this paper presents a tightly-coupled integration based on the Kalman filter (KF). When the WSN is available, the difference between the distances from the blind node(BN) to the reference nodes (RNs) measured by the INS and those measured by the WSN are used as measurement information for the KF due to its better observability and independence, which can effectively improve the accuracy of the KF. Simulations show that the proposed approach reduces the mean error of the position by about 50% compared with loosely-coupled integration, while the mean error of the velocity is a little higher than that of loosely-coupled integration. 展开更多
关键词 inertial navigation system (INS) wireless sensor network(WSN) tightly-coupled integration Kalman filter
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