508 refers to Section 508 of the Rehabilitation Act of 1973 that was later expanded by the Workforce Investment Act of 1998. The act requires that when Federal agencies develop, procure, maintain, or use electronic and information technology, they must ensure that it is accessible to people with disabilities.

关键词：计算机网络；联邦机构；信息服务；信息技术

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Designers are increasingly relying on FPGA-based emulation to evaluate the performance of LDPC codes.In this paper,we propose a novel approximate lower triangular structure for the parity part of the parity-check matrix of QC-LDPC codes.Next,a high speed partially parallel decoder architecture which based on the Offset BP-based decoding algorithm is proposed.The results indicate that the frequency can reach 100MHz and its throughput rate can reach 113Mbps.

关键词：近似下三角结构的LDPC;失调基于BP译码算法; FPGA

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The system which could be described as "trinity,seven subsystems" has realized automatic remote control of the machine working process with orientation,localization and formalization.At local place,it realized automatic position and pose online detection,automatic orientation tunneling,automatic section cutting and forming and adaptive control of cutting arm swaying speed,it was the first time that realized absolute measuring of roadheader frame position and pose error under coal mine working condition in our country which could avoid error accumulation in relative measuring and guarantee the high precision of orientation tunneling.In underground remote,it realized remote monitoring,wireless remote control and video surveillance,thus realized remote control with multiple angles,visualization and one-button control under the condition of dustiness and vibration.At any network access point on ground using mining ring network,it realized real-time monitoring and displaying of roadheader running state parameters,and realized the functions of remote fault diagnosis and alarming.The whole system has been tested many times underground.The application results show that it is stable and reliable.With the development of automation,intellectualization,and informatization and other high technology,this system will be more and more suitable for fully mechanized excavation face.

关键词：位姿检测;方向掘进;自动分条切割和成形控制;可视化远程控制;掘进机

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To resolve the limitation of information safety and transmission speed in existing communication system,it applied the modular design method to design optical-electric combined THz wireless communication system framework,and determined 125GHz carrier frequency.Aiming at the core component optical emitter uni-traveling-carrier photodiode(UTC-PD) in THz wireless communication system,it analysed the relationship between output power,bandwidth and input signal types,and determined the emitter bandwidth by experiment.The result shows that the transmission speed in the system is able to reach 3.0Gbps when BER is less than 10-10.

关键词：无线通信；光发射器；性能分析；电子信息

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To further improve the accuracy of SAR image segmentation in the marine spill oil detection,a segmentation method of marine spill oil images based on Gabor,Krawtchouk moments and KFCM is proposed in this paper.Firstly,the marine spill oil image is decomposed by Gabor transform to obtain the texture features of image.Then,the Krawtchouk moments are applied to extract the shape features of image.Finally,the image segmentation is achieved based on KFCM.A large number of experimental results show that,compared with the related segmentation methods such as Tsallis entropy threshold method,CV model method and the method based on Gabor,Krawtchouk moments and FCM,the proposed method can achieve better result.

关键词：海上溢油检测;图像分割;的Gabor; Krawtchouk矩;核模糊C均值

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More and more, robots are expected to interact with humans in a social, easily understandable manner, which presupposes effective use of robot affect. This chapter provides a brief overview of research advances into this important aspect of human-robot interaction.

关键词：机器人；清晰度；相互作用；人机交互

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关键词：机器人;算法;控制系统;相互作用

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The problem: Understanding intent is a critical aspect of communication among people and for many biological systems. While people are very good at recognizing intentions, endowing an autonomous system (robot or simulated agent) with similar skills is a more complex problem, which has not been sufficiently addressed in the field. The issue of intent recognition is particularly important in situations that involve collaboration among multiple agents or assessment of potential threats. In the former case collaboration can be greatly enhanced, while in the latter case dangerous situations can be detected before any harmful actions can be finalized. In this project, we propose to develop methodologies for intent understanding, with specific focus on autonomous systems for naval and collaborative robotics applications. The main research problems we will address in this project are to: (1) develop tools for understanding the high-level intentions of groups of agents, (2) develop algorithms for intent understanding based on contextual information, (3) develop vision-based techniques for learning of contextual information, and detection and identification of objects of interest.

关键词：计算机视觉；机器人；检测；鉴定；海军装备

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Raspberry Pi is a credit card sized Linux computer based on ARM11 architecture.Because of its small size,low power consumption and powerful performance,a robot controller is a suitable role for it to play.As a robot with artificial intelligence,speech recognition for controlling the robot and voice feedback to users is key parts of the entire system.In this essay,a robot called Lisa is assembled,and a speech control and interactive system is implemented based on Google voice API which is a voice recognition engine provided as a cloud service.In order to analysis complex voice commands,a semantic method is developed to catch key words from command sentences.Then try to make a pattern match between key words and instruction set build-in the robot control system.The speech recognition control and interactive system is effective and well behaved after experimental verification.

关键词：ASR；TTS；树莓丕；机器人

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In this paper,we present a new approach to improve extracting accuracy of impervious surfaces.One Landsat TM image of Taiyuan city,Shanxi Province of China was used.After doing test work and analyzing using optimum bands analysis,principal component analysis,and normalized difference impervious surface index,we present the method,optimized band combination.Both unsupervised and supervised classification methods were used to classify the original image,principal component analysis image,normalized difference impervious surface index image,and optimized band combination images we present.The accuracies result of these classifications were assessed by using 256 randomly selected sampling points,and it was found that the overall accuracy the accuracy of optimized band combination method can be reach 87.72％,with the Kappa statistic of 0.85 in impervious surface extraction,it was better than other three methods can get.

关键词：不透水表面提取；遥感图像处理；电子信息

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