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2012 national Conference on Information technology and Computer science

作者： Yanru LIU Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Dechao HU Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Xiaohui LI Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china

To improve the reliability of spectrum sensing,a cooperative spectrum sensing information transmission scheme is discussed in this ***-coding and cyclic delay diversity （CDD） techniques are fully considered and properly combined to obtain diversity *** results show that the proposed scheme can reduce error rate and further improve the cooperative spectrum sensing performance in the multipath fading channel.

关键词： Cooperative spectrum Cyclic delay diversity Spacefrequency coding

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A Design of Remote Monitoring System based on 3G and Internet technology

A Design of Remote Monitoring System based on 3G and Interne...

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2012 national Conference on Information technology and Computer science

作者： Shouxian WEN Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Lei XU Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Xingguo SUN Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Xiaohui LI Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china

Aiming at the low-rate and short-distance communication in existing temperature and humidity monitoring system,this paper designs a remote monitoring system based on 3G and Internet *** system consists of data acquisition module and data remote transmission ***128 is used to be as a master control chip of data acquisition module,which realizes the data acquisition and pretreatment,and the collected data is transmitted to the host node by the low-power wireless transmission module NRF905 which is installed on slave nodes,and then the converged data is transmitted to Internet by 3G *** system can realize remote monitoring,centralized management and so *** experimental results show that the system has the advantages of low installation cost,low consumption,high sensitivity,high accuracy,long-distance communication and high rate etc.

关键词： DS18B20 3G NRF905 Standard Definition (SD) card Data acquisition subsystem Data remote transmission subsystem.

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基于知识发现的电力负荷预测模型

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计算机科学 2010年第4期37卷 212-214,230页

作者：窦全胜史忠植于尔铿杨斌刘仲尧山东工商学院计算机科学与技术学院烟台264005 中国科学院计算技术研究所北京100080 烟台东方电子信息产业集团有限公司烟台264001 黑龙江省电力有限公司哈尔滨150010

负荷预测是电力系统的一个传统研究问题。针对黑龙江省的气象和经济特点,提出了基于知识发现的负荷预测模型。首先通过传统的近大远小方法生成基本预测曲线,并根据从历史气象资料及负荷数据中提取的规则加以修正,生成最终预测曲线。该... 详细信息

负荷预测是电力系统的一个传统研究问题。针对黑龙江省的气象和经济特点,提出了基于知识发现的负荷预测模型。首先通过传统的近大远小方法生成基本预测曲线,并根据从历史气象资料及负荷数据中提取的规则加以修正,生成最终预测曲线。该模型在黑龙江省电网公司得以应用,收到了较为理想的效果。

关键词：荷预测知识发现

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维普期刊数据库

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CUKNN: A PARALLEL IMPLEMENTATION OF K-NEAREST NEIGHBOR ON CUDA- ENABLED GPU

CUKNN: A PARALLEL IMPLEMENTATION OF K-NEAREST NEIGHBOR ON CU...

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2009 IEEE Youth Conference on Information,computing and Telecommunication(YC-ICT2009)

作者： Shenshen Liang 1 , Cheng Wang 2 Ying Liu 1,3 , Liheng Jian 1 1 Graduate University of chinese academy of sciences, beijing, china 100190 2 Agilent Technologies Co. Ltd., beijing, china 100102 3 Fictitious Economy and Data science Research center, chinese academy of sciences beijing, china 100190

Recent development in Graphics Processing Units (GPUs) has enabled inexpensive high performance computing for general-purpose applications. Due to GPU's tremendous computing capability, it has emerged as the co-processor of the CPU to achieve a high overall throughput. CUDA programming model provides the programmers adequate C language like APIs to better exploit the parallel power of the GPU. K-nearest neighbor is a widely used classification technique and has significant applications in various domains. The computational-intensive nature of KNN requires a high performance implementation. In this paper, we present a CUDA-based parallel implementation of KNN, CUKNN, using CUDA multi-thread model. Various CUDA optimization techniques are applied to maximize the utilization of the GPU. CUKNN outperforms significantly and achieve up to 15.2X speedup. It also shows good scalability when varying the dimension of the training dataset and the number of records in training dataset.

关键词： KNN, classification, CUDA, parallel computing

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A Design of Digital Handheld Terminal in Wireless Data Acquisition System

A Design of Digital Handheld Terminal in Wireless Data Acqui...

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2012 national Conference on Information technology and Computer science

作者： Xingguo SUN Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Lei XU Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Shouxian WEN Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Xiaohui LI Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china

In order to make data collection more convenient,quick and accurate in working site in the existing wireless data acquisition system,one kind of multi-function handheld terminal is designed which combines the wireless and wired data *** paper adopts Atmega128 of ATMEL as microcontroller,nRF905 of Nordic as data transmission *** designs power management,liquid-crystal display and data storage *** results of practical test show that the handheld terminal can be applied to all kinds of wireless data acquisition networks,and it has several advantages like easy to carry,large data storage capacity,rich function and low cost.

关键词： DS18B20 NRF905 Handheld terminal Data acquisition system

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时间Petri网的时间知识推理算法及在铁路智能运输系统中的应用

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铁道学报 2002年第5期24卷 5-10页

作者：叶阳东杜彦华高军伟贾利民铁道科学研究院电子计算技术研究所北京100081 郑州大学计算机科学系河南郑州450052

介绍一种基于时间Petri网的时间知识推理算法,它是在已有算法的基础上,引入模糊时间区间的操作进行扩展而形成。该算法可一次性构建相应的时间知识系统的生成图,再用生成图进行时间知识验证和推理,相对于已有的算法来说,具有效率高、可... 详细信息

介绍一种基于时间Petri网的时间知识推理算法,它是在已有算法的基础上,引入模糊时间区间的操作进行扩展而形成。该算法可一次性构建相应的时间知识系统的生成图,再用生成图进行时间知识验证和推理,相对于已有的算法来说,具有效率高、可处理时间区间的不确定性问题等优点。针对列车运行的时间知识系统进行算法的应用研究得出:本算法可验证时间约束的列车运行调整方案的可行性;能验证铁路专家系统中时间知识的一致性问题;用生成图可推导出某些带时间约束事件同时发生的可能性等。

关键词：时间Petri网入时间知识时间区间列车运行铁路智能运输系统 RITS

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维普期刊数据库

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Simulation and Analysis of Influence of Group Delay Distortion on Performance of DBF System

Simulation and Analysis of Influence of Group Delay Distorti...

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2012 national Conference on Information technology and Computer science

作者： Hao GAO Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china Xiaohui LI Key Lab of intelligent computing and Signal Processing of Ministry of Education,Anhui University Hefei,china

Group delay distortion between channels is one of the most important factors which affect the BER （bit error rate） performance of DBF （digital beam forming） *** basic principles of DBF and the concept of group delay are first introduced,and a linear group delay filter is designed based on the relationship between the minimum phase system and the cepstral *** then a multi-channel group delay distortion model for simulation in MATLAB software is established.A QPSK system is simulated in multi-channel group *** results show that the degradation of BER performance is caused by group delay distortion,and the more serious distortion of group delay,the greater deterioration of BER performance.

关键词： DBF multi-channel group delay distortion BER simulation

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ON ENHANCING KATZ-SMOOTHING BASED BACK-OFFLANGUAGE MODEL

ON ENHANCING KATZ-SMOOTHING BASED BACK-OFFLANGUAGE MODEL

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6～(th) International Conference on Spoken Language Processing

作者： Jian Wu and FangZhengcenter of Speech technology State Key Laboratory of intelligent technology and Systems Department of Computer science and technology. Tsinghua University beijing china

＜正＞Though the statistical language modeling plays an important role in speech recognition, there are still problems that are difficult to be solved such as the sparseness of training data, Generally, two kinds of smoothing approaches, namely the back-off model and the interpolated model, have been proposed to solve the problem of the impreciseness of language models caused by the sparseness of training data. By expanding the idea of interpolation model to Katz-smoothing based re-estimation of the

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IXP2400网络处理器及其微引擎中多线程实现的研究

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计算机工程与应用 2004年第9期40卷 26-28,57页

作者：吴闻李雪莹许榕生刘秉瀚福州大学信息科学与技术学院福州350002 中国科学院高能物理研究所计算中心

网络处理器兼顾了ASIC的高性能和RISC芯片的可编程灵活性,能较好地满足数据通信高速发展的要求,在将来的网络设备中,有广阔的应用前景。IXP2400是Intel公司推出的第二代网络处理器。它采用了高性能的并行体系结构来处理复杂的算法、包... 详细信息

网络处理器兼顾了ASIC的高性能和RISC芯片的可编程灵活性,能较好地满足数据通信高速发展的要求,在将来的网络设备中,有广阔的应用前景。IXP2400是Intel公司推出的第二代网络处理器。它采用了高性能的并行体系结构来处理复杂的算法、包内容检测、流量管理和线速转发。多线程技术是IXP2400实现高速数据处理的关键技术。该文介绍了IXP2400的硬件结构及软件开发,并分析了其微引擎中多线程实现的有关技术。

关键词：网络处理器微引擎多线程 RISC 嵌入式系统

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维普期刊数据库

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BIFURCATION CONTROL AND NONSMOOTH FEEDBACK

BIFURCATION CONTROL AND NONSMOOTH FEEDBACK

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第二十届中国控制会议

作者： Hua O. Wang Yiguang Hong Laboratory for intelligent and Nonlinear Control (LINC) Department of Electrical and Computer Engineering Duke University, Durham, NC 27708, U.S.A and center for Nonlinear and Complex Systems and Dept. of Control science and Engineering Huazhong University of science and technology, china. institute of Systems sciences, chinese academy of sciences beijing 1.0080, china.

＜正＞In the paper, we exhibit the usefulness of nonlinearity in two aspects: analysis of nonlinear dynamics and nonsmooth feedback design. Two illustrative examples are given to show how the new bifurcation phenomena... 详细信息

关键词： nonlineariy bifurcation fractional power control.

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