基于嵌入式系统的激光扫描检测系统

为了提高回转体零件的加工和检测精度,将光电检测技术与电子计算机技术相结合,设计并研制了一种基于嵌入式系统的激光扫描检测系统,给出了设计原理和软硬件设计方法,并利用该系统对轴径不同的六组标准工件进行测量.实验表明,该系统的平均测量误差为0.00283mm,满足设计指标要求的3μm,能够极大提高回转体零件的尺寸测量精度,具有较好的应用价值.     

一种基于ARM的救援探测机器人的设计

本文主要介绍了一种基于ARM内核的S3C44B0救援探测机器人的设计,该机器人由将实时性较高的操作系统Linux移植到S3C44B0的控制系统、多传感器系统、运行与避障电路系统、图像采集处理系统、无线数据收发系统组成.在Linux开发环境下编写应用程序,实现能远程控制救援探测机器人行走与自动避障、温度和湿度以及O2、H2S、C2H4O等几十种可燃和有毒气体含量的检测、现场图像的采集、无线传输与控制的功能,其特点是能够远程无线控制机器人和远程采集信息.     

ED-SWE: Event detection based on scoring and word embedding in online social networks for the internet of people

Online social media networks are gaining attention worldwide, with an increasing number of people relying on them to connect, communicate and share their daily pertinent event-related information. Event detection is now increasingly leveraging online social networks for highlighting events happening around the world via the Internet of People. In this paper, a novel Event Detection model based on Scoring and Word Embedding (ED-SWE) is proposed for discovering key events from a large volume of data streams of tweets and for generating an event summary using keywords and top-k tweets. The proposed ED-SWE model can distill high-quality tweets, reduce the negative impact of the advent of spam, and identify latent events in the data streams automatically. Moreover, a word embedding algorithm is used to learn a real-valued vector representation for a predefined fixed-sized vocabulary from a corpus of Twitter data. In order to further improve the performance of the Expectation-Maximization (EM) iteration algorithm, a novel initialization method based on the authority values of the tweets is also proposed in this paper to detect live events efficiently and precisely. Finally, a novel automatic identification method based on the cosine measure is used to automatically evaluate whether a given topic can form a live event. Experiments conducted on a real-world dataset demonstrate that the ED-SWE model exhibits better efficiency and accuracy than several state-of-art event detection models.     

多目标宏形状特征点集快速检测技术研究

提出一种新的图像多目标特征点集检测技术。该技术研究了多目标分割、目标细微形状提取和宏形状提取,进而检测表示目标宏形状特征的特征点集。各目标宏形状特征点集进行识别与跟踪．研究了上述技术的快速实现。实际DSP跟踪系统处理结果表明该技术计算量小,抗噪能力强且准确性高,能准确识别目标,适用于实际图像目标特征点集的检测。     

A pilot-assisted non-Cyclic Prefixed MIMO-SCFDE system

A non-Cyclic Prefixed Multiple-Input Multiple-Output Single-Carrier Frequency-Domain Equalization (non-CP MIMO-SCFDE) system based on a recursive algorithm of Joint Channel Es- timation and Data Detection (recursive-JCEDD) is proposed in this paper. Unlike the traditional CP MIMO-SCFDE system, the transmitted block of the proposed system is designed in the way that block-type pilot sequences and Single-Carrier (SC) information sequences have been arranged alter- nately without any cyclic prefix before each ...     

支持容侵的安全群组通信系统体系结构的研究

本文对入侵容忍的模型和TTCB结构进行了分析，在MAFTIA节点基础上，增加了一个事件处理引擎的核心模块，使得节点在参与者层与站点层支持自由选择安全群组通信系统中的密钥协商协议和新的加密算法。以改进的MAFTIA节点为基本单元。构建了基于可信实时计算基的新型安全群组系统。该系统能够集成新的安全群组通信密钥协商协议，通过事件处理引擎模块完成群组通信安全的任务，在安全性能方面更为灵活，具有较好的可扩展性与容忍入侵能力。     

数字电视机顶盒检测信息解析及应用

详细介绍了数字电视机顶盒的检测信息和数字电视系统的主要技术参数,并通过具体案例阐述如何应用检测信息进行分配网络的维修。     

有线电视基站相线和零线的检测与自动矫正

探讨了交流电网中相线和零线的正确接法以及相线和零线接反后所造成的危害，并给出了相线和零线接反时的两种自动矫正电路。     

G.169自动电平控制装置标准及其实现

介绍ITU－T G．169自动电平控制装置标准及其性能要求，提出一种基于该协议的自动电平控制系统结构，并设计系统的实现算法，计算机仿真结果表明，笔者提出的ALC系统可行有效，能满足G．169的要求。