The finite element model for the cab body-in-white (BIW) of heavy commercial vehicle is setup,and based on which a modal analysis is performed.In order to verify the accuracy of the model,using multiple input multiple output methods on body structure modal test,using modal analysis technique to identify the inherent frequency and vibration type.Access to the cab modal distribution,in order to improve the structure of the weak areas to enhance the overall performance of structure,proposed amendments.

关键词：汽车；型商用车；驾驶室白车身；有限元法；模态分析

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ECRPW (energy-efficient clustering routing protocol based on weight) routing protocol is presented to avoid the characteristic of limited energy for wireless sensor networks.It takes nodes' residual energy into consideration during the process of cluster heads being elected.The constraint of distance threshold is used to optimize cluster scheme.Furthermore,it also sets up the routing tree based on cluster heads' weight.We simulate and analyze LEACH and ECRPW in NS2.The results show that the performance of ECRPW is better than LEACH.

关键词：无线传感器网络;聚类;路由协议

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In order to provide the environment for the growth of a crop monitoring program,design a monitoring system.In accordance with three-tier structure of the Internet of Things,the structure of system is built by the way of using aware interactive layer,network transport layer,application service layer.By using Things technology the function of monitoring and controlling the agricultural greenhouse air temperature and humidity,light intensity and other environmental data is implemented.The data that sensors have collected is processed by Bayes filtering and sent to the monitoring terminal platform to display.The simulation results show that reliability of data through the Bayes filtering is enhanced.By making the MATLAB software simulation experiment the results show that the system is running well,the communication is normal,and after the filtering process the monitoring data curve is smoother,reducing data errors.

关键词：物联网技术;无线通信;无线个域网;传感器技术;贝叶斯过滤器

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By force analysis of load limiter,the nonlinear relation between the load and the force of sensor in indirect measurement of tower crane load is indicated.Using the force of sensor as input and the load as output,the nonlinear correction model based on functional link neural network (FLNN) is proposed to eliminate the nonlinear errors of load measurement.By adding some high-order terms,the model uses the single-layer network to realize the network supervised learning.The approach can improve network learning speed and simplify the network structure,and provides a new way for On-line measurement of tower crane load.The system realization and network simulation about tower crane QTZ63 are presented,Practical application shows that the maximum relative error of measured load is less than 2.1％ and can satisfy National standard GB5144-94.

关键词：塔式起重机载荷;功能链接神经网络;在线监测系统;非线性校正

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A single-chip solution is proposed to realize the node design based on 2.4 GHz Zig,Bee wireless sensor network.Mesh network topology is achieved by the use of ZigBec Pro protocol stack on the hardware platform.When the packets are successfully sent to the coordinator node,a relevant event will be generated by the local node.Hence,the parent node lost event can be obtained by comparing the number of the packets sent by the child node and the number of the packets sent successfully shown by the respond event.A wireless sensor network is designed to work independently from the coordinator node and can be re-connected according to the needed set to resume the network.When the coordinator node is taken away from the site or power down by happenstance and power up again after a long time,the parent lost event in the child nodes can make it rejoin the new coordinator node again when needed.The network self-healing function can be achieved by this mechanism that makes the network more stable.

关键词：JN5148；无线个域网；啮合；自愈网络

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Low power and Iossy networks have been an active area of research.Numerous protocols have been proposed for routing in these networks using metrics like hop count,delay,bandwidth etc.The IETF ROLL group has proposed a proactive gradient protocol called RPL.However,for a network with few mobile sinks calculating gradients using proactive approach is not energy efficiency.This paper proposed a multipath routing protocol for Wireless Sensor Networks with mobile sinks,called MDMR.Directed Acyclic Graphs (DAGs) are required for WSNs organization because of their route redundancy to the root.MDMR is based on RPL framework.By broadcasting DAG construction messages including metrics,such as,hop count,node energy and link quality indication,protocol constructs DAG and provides path redundancy.This allows nodes to find multiple alternative paths easily while link failures.

关键词：无线传感器网络；多路径；路由协议；DAG；RPL

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Driver inattentiveness and distraction resulting in unsafe vehicle maneuvers are a significant safety concern because such behavior can directly lead to crashes. An effective technical countermeasure is to detect unsafe driving events and provide drivers with advanced warning information. This study presents an intervehicle safety warning information system. An inertial measurement unit consisting of an accelerometer and gyro sensor in addition to a Global Positioning System receiver was used to collect data for the developed algorithm. Vehicle position, speed, acceleration, and angular velocity data were analyzed and were used as inputs for the algorithm. A support vector machine classifier was also incorporated into the algorithm to identify further the severity of unsafe driving events. The performance evaluation results showed that the detection algorithm could capture longitudinal and transverse unsafe driving events. In addition, a prototype of the proposed warning information system was implemented on a test bed in support of vehicle-to-vehicle and vehicle-to-infrastructure communications. Extensive field tests have been conducted in the test bed to fine-tune the prototypical system. These results demonstrate that the system holds promise for improving drivers' safety and mitigating crash risks.

关键词：信息系统；预警监测；模型；实现

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A mathematical model of a Molten Carbonate Fuel Cell (MCFC) is shown.The model is used to simulate an experimental lab-stand single fuel cell unit measuring 55 cm2.The comparison of simulated data against the experimental results is shown and commented on.

关键词：燃料电池；碳酸盐；优化工作条件；数学模型

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The presentation, 'NREL Fuel Cell and Hydrogen Technologies Program Overview,' was presented at the Fuel Cell and Hydrogen Energy Expo and Policy Forum, April 24, 2013, Washington, D.C.

关键词：燃料电池；氢技术；NREL

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A prototype of video detection system applied to traffic flow inspection is developed,which uses CMOS linear image sensor with high resolution 2K pixels and wide dynamic range as the core of imaging device.It combines FPGA with DSP as the core of acquisition and processing of massive image data.Moreover,a novel multiscale and hierarchical clustering algorithm for image segmentation is presented.Based on the theory of graph spectral,the algorithm can construct a new graph by analyzing the feature of an original image at different clustering scales,so that image (gmentation) can be accomplished easily to segment the image.The simulation results show that the (scan) speed of this system can reach to 1000 lines per second,the resolution being 2048 pixels.

关键词：视频检测;CMOS图像传感器线;DSP;分层聚类;多尺度

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