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Design and realization of double-mode communication platform based on CVIS 基于CVIS的双模通信平台的设计与实现
W. Shangguan, Manqiang Ge
With the rapidly development of economy, traffic congestion has become a bottleneck restricting of the development of the urban economy. As the core of future development and direction of intelligent transportation, the CVIS (Cooperative Vehicle Infrastructure System) is the key to solve the urban traffic congestion problems. And the wireless communication technology of high quality is the key point of research in CVIS. The work of this paper is to build the wireless communication platform of CVIS and research problem of information interaction between DSRC (Dedicated Short Range Communications) and WIFI (Wireless Fidelity) under environment of CVIS. This paper analyzes the application between DSRC and WIFI in CVIS and builds a wireless communication platform based on PCM-9562. Through the study of car-following model with single lane, this paper achieves data exchange between application and communication platform by using GPS information. Combined with MapX, the communication platform completes the real-time display of position, velocity and driving strategy. The result of test shows that double-mode communication platform based on CVIS can realize the real-time transmission of data effectively and assist driver to get the information of position and velocity from itself and other cars and finally provide effective reference information to the driver in the pattern of car-following.
随着经济的快速发展,交通拥堵已成为制约城市经济发展的瓶颈。协同车辆基础设施系统(Cooperative Vehicle Infrastructure System, CVIS)作为未来智能交通发展的核心和方向,是解决城市交通拥堵问题的关键。而高质量的无线通信技术是CVIS研究的重点。本文的工作是搭建CVIS无线通信平台,研究CVIS环境下DSRC (Dedicated Short Range Communications)与WIFI (wireless Fidelity)之间的信息交互问题。本文分析了DSRC与WIFI在CVIS中的应用,搭建了一个基于PCM-9562的无线通信平台。本文通过对单车道车辆跟随模型的研究,利用GPS信息实现了应用程序与通信平台之间的数据交换。通信平台结合MapX完成位置、速度和行驶策略的实时显示。测试结果表明,基于CVIS的双模通信平台可以有效地实现数据的实时传输,辅助驾驶员获取自身和其他车辆的位置和速度信息,最终为驾驶员在跟车模式下提供有效的参考信息。
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引用次数: 0
Towards a hybrid approach of Primitive Cognitive Network Process and Self-Organizing Map for computer product recommendation 基于原始认知网络过程和自组织映射的计算机产品推荐混合方法研究
Vincent Qi Chen, K. Yuen
Products have similarities which can be analyzed to recommend products to consumers with different preferences. This paper combines Primitive Cognitive Network Process (PCNP) and Self-Organizing Map (SOM) to cluster products into appropriate categories on the basis of consumer preferences and product similarities. PCNP is an ideal alternative of Analytic Hierarchy Process (AHP) to quantify the weights for the attributes used in SOM. To demonstrate the applicability of PCNP-SOM, an example of computer product recommendation is illustrated.
产品具有相似性,可以通过分析相似性向不同偏好的消费者推荐产品。本文将原始认知网络过程(PCNP)和自组织映射(SOM)相结合,根据消费者偏好和产品相似度将产品聚类到适当的类别中。PCNP是层次分析法(AHP)的理想替代方案,用于量化SOM中使用的属性的权重。为了证明PCNP-SOM的适用性,给出了一个计算机产品推荐的例子。
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引用次数: 1
A flame detection algorithm based on Bag-of-Features in the YUV color space 一种基于YUV色彩空间特征袋的火焰检测算法
Zhaoguang Liu, Xing Zhang, Yang-Yang, Cengceng Wu
Computer vision-based fire detection involves flame detection and smoke detection. This paper proposes a new flame detection algorithm, which is based on a Bag-of-Features technique in the YUV color space. Inspired by that the color of flame in image and video will fall in certain regions in the color space, models of flame pixels and non-flame pixels are established based on code book in the training phase in our proposal. In the testing phase, the input image is split into some N×N blocks and each block is classified respectively. In each N×N block, the pixels values in the YUV color space are extracted as features, just as in the training phase. According to the experimental results, our proposed method can reduce the number of false alarms greatly compared with an alternative algorithm, while it also ensures the accurate classification of positive samples. The classification performance of our proposed method is better than that of alternative algorithms.
基于计算机视觉的火灾探测包括火焰探测和烟雾探测。本文提出了一种新的火焰检测算法,该算法基于YUV颜色空间中的特征袋技术。受图像和视频中火焰的颜色会落在颜色空间的特定区域的启发,我们的方案在训练阶段基于代码本建立了火焰像素和非火焰像素的模型。在测试阶段,将输入图像分成若干N×N块,并对每个块分别进行分类。在每个N×N块中,YUV颜色空间中的像素值被提取为特征,就像在训练阶段一样。实验结果表明,与替代算法相比,我们的方法可以大大减少误报警的数量,同时也保证了阳性样本的准确分类。该方法的分类性能优于已有的分类算法。
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引用次数: 13
Visual tracking via weighted sparse representation 基于加权稀疏表示的视觉跟踪
Du Xiping, Liu Jiafeng, Tang Xianglong
Recently, sparse representation has been used in visual tracking, and related trackers have emerged. However, such sparse representation is not stable and has the potential to represent a candidate with dissimilar target templates. Therefore, a new tracker based weighted sparse representation (WSRT) is proposed. Specifically, to represent a candidate, each target template is weighted according to its similarity to the candidate. The bigger the similarity is, the bigger the probability of the target template to be chosen will be. The proposed tracker chooses the similar target templates to represent each candidate and reflects the locality structure between the candidate and target templates. Experimental results show that the proposed tracker has excellent performance.
近年来,稀疏表示被用于视觉跟踪,并出现了相关的跟踪器。然而,这种稀疏表示并不稳定,并且有可能表示具有不同目标模板的候选对象。为此,提出了一种新的基于跟踪器的加权稀疏表示(WSRT)。具体来说,为了表示候选对象,每个目标模板根据其与候选对象的相似度进行加权。相似度越大,目标模板被选择的概率越大。该跟踪器选择相似的目标模板来表示每个候选模板,并反映候选模板和目标模板之间的局部性结构。实验结果表明,该跟踪器具有良好的性能。
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引用次数: 0
Hand recognition based on finger-contour and PSO 基于手指轮廓和粒子群算法的手部识别
Fu Liu, Huiying Liu, Lei Gao
Hand shape recognition method based on geometric features uses individual information limitedly and inadequately. To solve this problem, this paper proposes a hand shape recognition method based on contour features of fingers. Firstly, we separate the four fingers and use curve fitting method to position the axis of finger. Then the matched fingers are normalized by translation and rotational alignment, so we can conduct the matching of contour features. Finally, in order to further improve the recognition rate, particle swarm optimization (PSO for short) is used to optimize the cut-off coefficient and the weight values of different fingers. Experimental results show that the proposed method can locate hand more accurately and make full use of hand information. It can also avoid the influence of inaccurate feature points locating and unstable contour around finger valleys. The recognition rate can reach 94.78%.
基于几何特征的手形识别方法对个体信息的利用有限且不充分。为了解决这一问题,本文提出了一种基于手指轮廓特征的手部形状识别方法。首先,我们将四个手指分开,用曲线拟合的方法定位手指的轴线。然后通过平移和旋转对齐对匹配的手指进行归一化,进行轮廓特征的匹配。最后,为了进一步提高识别率,采用粒子群算法(particle swarm optimization,简称PSO)对不同手指的截止系数和权重值进行优化。实验结果表明,该方法可以更准确地定位手部,并充分利用手部信息。它还可以避免特征点定位不准确和指谷周围轮廓不稳定的影响。识别率可达94.78%。
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引用次数: 3
Density induced p-norm support vector machine for binary classification 密度诱导p-范数支持向量机的二值分类
Ruikun Ma, Zhi Li, Junyan Tan
This paper presents a new version of support vector machine (SVM) named density induced p-norm SVM (0 <; p <; 1), DPSVM for shot. Our DPSVM introduces the density degrees into the standard p-norm SVM. It extracts the relative density degrees for the training examples and takes these degrees as relative margins for corresponding training examples. Our DPSVM not only inherits good performance of p-norm SVM which can realize feature selection and classification simultaneously, but also improves the performance of p-norm SVM. The numerical experiments results show that our DPSVM is more effective than some usual methods in feature selection and classification.
本文提出了一种新的支持向量机(SVM),即密度诱导p-范数支持向量机(0 <;p <;1)、DPSVM为shot。我们的DPSVM在标准p-范数支持向量机中引入了密度度。它提取训练样例的相对密度度,并将这些密度度作为相应训练样例的相对余量。我们的DPSVM不仅继承了p-范数支持向量机同时实现特征选择和分类的优良性能,而且提高了p-范数支持向量机的性能。数值实验结果表明,该方法在特征选择和分类方面比一般方法更有效。
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引用次数: 0
Study of cognitive model for Ad hoc network based on high-order multi-type π calculus modeling 基于高阶多型π演算建模的Ad hoc网络认知模型研究
Guosheng Zhao, N. Zhang, L. Sheng
This paper proposed a cognitive model for Ad hoc network, and combined formal modeling of cognitive model with quantitative analysis of cognitive performance, thus at the same time of formal modeling through quantitative analysis obtained Ad hoc network cognitive performance parameters.
本文提出了一种Ad hoc网络的认知模型,并将认知模型的形式化建模与认知性能的定量分析相结合,从而在形式化建模的同时通过定量分析获得Ad hoc网络的认知性能参数。
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引用次数: 1
Performance of Advanced Metering Infrastructure using cellular communication based on uplink CDMA 基于上行CDMA的蜂窝通信高级计量基础设施性能研究
D. Arias, G. Rodriguez
This paper studies the Okumura- Hat propagation model on CDMA technology applied in AMI (Advanced Metering Infrastructure). The aim of this proposal is to get information from the intelligent meter such us: outage management system, status and ratings reading. Prepaid services are oriented to the specific characteristics of rural dwellers. Furthermore, it allows to the energy distribution companies to know the energy consumption in real time. The Okumura - Hata propagation model helps to evaluate a communication system due to its good practices and results obtained with this method using cellular technology. The use of CDMA technology in electrical measurement systems helps to reduce the costs of non-technical losses, resulting in: better quality in the electrical systems and obtaining actual data readings that improves communication between the consumer and the distributor.
研究了应用于AMI (Advanced Metering Infrastructure)的CDMA技术的Okumura- Hat传播模型。本方案的目的是从智能电表中获取信息,如:停电管理系统,状态和额定读数。预付费业务针对农村居民的具体特点。此外,它允许能源分配公司实时了解能源消耗情况。Okumura - Hata传播模型有助于评估通信系统,因为它具有良好的实践和使用蜂窝技术的方法获得的结果。在电气测量系统中使用CDMA技术有助于减少非技术损失的成本,从而提高电气系统的质量,并获得实际数据读数,从而改善消费者和分销商之间的沟通。
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引用次数: 4
Chinese accent detection research based on RASTA - PLP algorithm 基于RASTA - PLP算法的汉语重音检测研究
Zhang Long, Zhao Yunxue, Zhang Peng, Yan Ke, Zhang Wei
Accent is a critical important component of spoken communication, which plays a very important role in spoken communication. In this paper, we conduct accent by using RASTA - PLP algorithm to extract short-time spectrum features of each speech segment based on sub-segment splicing information. We build short-time spectrum feature sets based on RASTA - PLP algorithm. And we choose NaiveBayes classifier to model the feature sets. NaiveBayes is to choose the class with maximum posteriori probability as the object's class. This classification method makes full use of the related phonetic features of speech segment. Based on short-time spectrum of RASTA - PLP feature sets respectively achieve 80.8% accent detection accuracy on ASCCD and on ASCCD (NOISEX92-white). The experimental results indicate that based on sub-segment splicing feature structured method of RASTA - PLP can be used in Chinese accent detection study. RASTA-PLP algorithm is robust on ASSCD and on ASSCD (NOISEX92-white).
口音是口语交际的重要组成部分,在口语交际中起着非常重要的作用。本文采用基于子段拼接信息的RASTA - PLP算法提取每个语音段的短时频谱特征进行重音处理。基于RASTA - PLP算法构建短时频谱特征集。选择朴素贝叶斯分类器对特征集进行建模。朴素贝叶斯是选择后验概率最大的类作为对象的类。这种分类方法充分利用了语音片段的相关语音特征。基于短时间谱的RASTA - PLP特征集在ASCCD和ASCCD (NOISEX92-white)上的口音检测准确率分别达到80.8%。实验结果表明,基于子段拼接特征的RASTA - PLP结构化方法可用于汉语口音检测研究。RASTA-PLP算法在ASSCD和ASSCD (NOISEX92-white)上具有鲁棒性。
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引用次数: 5
Research on the capacity fading characteristics of a Li-ion battery based on an equivalent thermal model 基于等效热模型的锂离子电池容量衰减特性研究
Liu Xintian, Zeng Guojian, He Yao, Dong Bo, Xu Xingwu
Temperature has a direct impact on the capacity fading of a power Li-ion battery during the battery's lifecycle; however, the inner temperature of the battery cannot be measured directly because of the sealed structure. To address this problem, we estimate the inner temperature of a Li-ion battery by measuring the surface and ambient temperature using an equivalent thermal model to build the ETM-Arrhenius (equivalent thermal model-Arrhenius) model that models the dependence of the battery capacity fading on the inner temperature to enable the accurate prediction of the capacity fading characteristics of a Li-ion battery during its lifecycle. We conducted a lifecycle test on a Li-ion battery at different temperatures, and the results indicate that the ETM-Arrhenius model can predict the capacity fading characteristics of a Li-ion battery accurately during its lifecycle; in addition, when the model is used in EFK, UKF and other common state-of-charge (SOC) estimation algorithms, the accuracy of the SOC estimation can be improved significantly.
在动力锂离子电池的生命周期中,温度对电池的容量衰减有直接的影响;然而,由于电池的密封结构,无法直接测量电池内部温度。为了解决这一问题,我们通过测量锂离子电池的表面温度和环境温度,利用等效热模型来估计锂离子电池的内部温度,建立ETM-Arrhenius(等效热模型- arrhenius)模型,该模型模拟电池容量衰退对内部温度的依赖关系,从而准确预测锂离子电池在其生命周期内的容量衰退特性。对锂离子电池进行了不同温度下的寿命测试,结果表明,ETM-Arrhenius模型可以准确预测锂离子电池在生命周期内的容量衰减特性;此外,将该模型应用于EFK、UKF等常用荷电状态估计算法时,可显著提高荷电状态估计的精度。
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引用次数: 9
期刊
Proceedings of 2015 International Conference on Intelligent Computing and Internet of Things
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