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Sentiment Lexicon for Chinese College Students to Build and Apply 中国大学生情感词典的构建与应用
Di Wu, Jianpei Zhang, Jing Yang
Reviews from social media are considered as a significant information resource, which is useful for analyzing college students' sentiment and views. Students are eager to express and share their views on web regarding day-to-day activities. That information can be used to understand Chinese college students and their preference. Our research is meaningful in analyzing the psychological processes of students. In order to extract the fundamental student' associated sentiments from those reviews of plain texts, sentiment analysis has emerged and is regarded as a promising technology. In this regard, this paper proposes a novel lexicon model used in college students' domain to exploit semantic relationships between words in natural language text. The sentiment words are initially extracted through lexicon to describe the orientation and the polarity of the attitudes (positive, neutral or negative). Finally, sentiment strength of opinion is calculated and cause event is identified according to the finegrained lexicon. Comparison experimental results on real data from QQ speaking data validate the effectiveness and feasibility of the proposed lexicon model, providing high accuracy levels and low false positive rates. The described lexicon model gives the valuable knowledge to college manager who should detect the students' opinion trends.
社交媒体上的评论被认为是一种重要的信息资源,有助于分析大学生的情绪和观点。学生们渴望在网上表达和分享他们对日常活动的看法。这些信息可以用来了解中国大学生和他们的偏好。我们的研究对于分析学生的心理过程是有意义的。为了从普通文本的评论中提取基本的学生相关情绪,情绪分析已经出现,并被认为是一种有前途的技术。为此,本文提出了一种新的大学生领域词汇模型,用于挖掘自然语言文本中词与词之间的语义关系。情感词最初是通过词典提取出来的,用来描述态度的取向和极性(积极、中性或消极)。最后,根据细粒度词汇计算观点的情感强度,识别原因事件。在QQ语音真实数据上的对比实验结果验证了所提出的词典模型的有效性和可行性,具有较高的准确率和较低的误报率。所描述的词汇模型为高校管理者发现学生的意见趋势提供了有价值的知识。
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引用次数: 1
Research on Data Product Quality Evaluation Model Based on AHP and TOPSIS 基于AHP和TOPSIS的数据产品质量评价模型研究
Yaqing Si, Qingjun Xiao, Jing Su, Sen Zeng, Xiao Hong
This paper aims to construct a data product quality evaluation model for the data circulation market. First of all, this paper established an index system for data product quality evaluation by using multiple dimensions and fully considering the characteristics attached to data sets after production. On this basis, this paper divided all the indexes in the system in to two groups: objective indexes and subjective indexes, then designed reasonable quantitative method for each group according to their own features. With the combination of subjective evaluation and objective measurement, the quality level of data products would be shown in the form of numbers, which is more intuitive.
本文旨在构建面向数据流通市场的数据产品质量评价模型。首先,本文从多维度出发,充分考虑数据集生产后所附加的特性,建立了数据产品质量评价指标体系。在此基础上,本文将系统中的各项指标分为客观指标和主观指标两大类,并根据每一类指标的特点设计了合理的定量方法。将主观评价与客观测量相结合,将数据产品的质量水平以数字的形式表现出来,更加直观。
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引用次数: 0
Feature Acquisition for Facial Expression Recognition Using Deep Convolutional Neural Network 基于深度卷积神经网络的面部表情识别特征获取
Fan Dai, Weihua Li
We present a convolutional neural network for facial expression recognition based on feature acquisition. The proposed method adopts the structure of dual-channel convolution neural network, the network structure of each channel is designed according to the input sets, the extracted face and the extracted mouth are used as input to two channels simultaneously. Experiments are carried out on two different data sets include JEFFA and FER-2013 to determine the recognition accuracy, and we build a set to test our model, and we compare the generalization performance by using the confusion matrix, then we compared and analyzed the experiment results of recognition accuracy under different facial expressions. Finally, our facial expression recognition system got an accuracy of 82% and 78% respectively, and learning meta face recognition in unseen domains should be researched in the future.
提出了一种基于特征获取的卷积神经网络人脸表情识别方法。该方法采用双通道卷积神经网络结构,根据输入集设计每个通道的网络结构,将提取的人脸和提取的嘴巴同时作为两个通道的输入。在JEFFA和FER-2013两组不同的数据集上进行实验,确定识别精度,并建立一组数据集对模型进行测试,利用混淆矩阵对模型的泛化性能进行比较,然后对不同面部表情下的识别精度实验结果进行对比分析。最后,我们的面部表情识别系统分别获得了82%和78%的准确率,在未知领域学习元人脸识别是未来的研究方向。
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引用次数: 0
Learning Motion Based Auxiliary Task for Cardiomyopathy Recognition with Cardiac Magnetic Resonance Images 基于学习运动的心肌病磁共振图像识别辅助任务
Jingjing Xiao, Xiangjun Liu, Q. Tao, Jia Chen
Accurate analysis of the patient's heart function, and early diagnosis of myocardial disease can improve the treatment effect and reduce the medical cost significantly. Among the different medical imaging techniques, cardiac magnetic resonance (CMR) has high tissue contrast which is widely used in clinic. However, pro-processing CMR data manually for diagnose is extremely time consuming. To develop an automatic cardiomyopathy recognition algorithm among normal group, hypertrophic cardiomyopathy, and dilated cardiomyopathy group, we employ the CNN and LSTM to extract spatial and motion features. In addition, we propose a motion based auxiliary task to help the main recognition task, without additional annotation. In experiment, compared to C3D [1] and LRCN [2], the proposed method obtains the best performance. Both accuracy and AUC score achieve 0.94.
准确分析患者心功能,早期诊断心肌疾病,可显著提高治疗效果,降低医疗费用。在不同的医学成像技术中,心脏磁共振(CMR)具有较高的组织对比度,被广泛应用于临床。然而,人工对CMR数据进行预处理以进行诊断是非常耗时的。为了开发正常组、肥厚型心肌病组和扩张型心肌病组的心肌病自动识别算法,我们采用CNN和LSTM提取空间和运动特征。此外,我们提出了一个基于运动的辅助任务来帮助主识别任务,而不需要额外的注释。在实验中,与C3D[1]和LRCN[2]相比,该方法获得了最好的性能。准确率和AUC得分均达到0.94。
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引用次数: 0
Improve Quality of Experience of Users by Optimizing Handover Parameters in Mobile Networks 通过优化移动网络切换参数提高用户体验质量
R. Fang, Gang Chuai, Weidong Gao
As the demand for mobile services grows exponentially, the focus on wireless network optimization has been changed from Quality of Service (QoS) for the network to Quality of Experience (QoE) for users. The network optimization research about QoS in the past cannot surely meet the requirements of the users' QoE. Therefore, in this paper, a handover solution is proposed to improve the QoE while considering the QoE balance for a LTE network that provides different services. Compared with other optimization of QoE nowadays, the proposed solution balances and improves the QoE of users. The proposed solution controls handover parameter by running a handover optimization algorithm based on the dynamic particle swarm optimization (DPSO) in a central controller, which finally optimizes the overall QoE and reduces the proportion of users with extremely poor QoE. The simulation results show that the DPSO algorithm ensures the quality of the solution and increases the speed of convergence by nearly twice that of the standard particle swarm optimization algorithm (SPSO). After adopting the DPSO handover solution, the overall QoE of users is increased by 6.22 % and 4.59 % while the variance of users' QoE is decreased by 14.2 % and 22.6 %, compared with the full handover solution and the traditional handover solution respectively. The number of users with QoE less than 1.9 is reduced to 0 with the proposed solution.
随着移动业务需求呈指数级增长,无线网络优化的重点已经从网络的服务质量(QoS)转向用户的体验质量(QoE)。以往关于QoS的网络优化研究肯定不能满足用户对QoS的要求。因此,本文在考虑不同业务的LTE网络的QoE平衡的同时,提出了一种切换方案来提高QoE。与目前其他的QoE优化方案相比,该方案平衡并提高了用户的QoE。该方案通过在中心控制器上运行基于动态粒子群优化(DPSO)的切换优化算法来控制切换参数,最终优化整体QoE,降低QoE极差用户的比例。仿真结果表明,DPSO算法在保证解质量的同时,收敛速度比标准粒子群优化算法(SPSO)提高了近2倍。采用DPSO切换方案后,用户总体QoE比完全切换方案和传统切换方案分别提高了6.22%和4.59%,用户QoE方差分别降低了14.2%和22.6%。在提出的解决方案下,QoE小于1.9的用户数量减少到0。
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引用次数: 1
3D Visualization of Chart Scenery Based on OSG 基于OSG的海图场景三维可视化
Jinming Song, Xiuwen Liu, Peng Gao
The study aims to explore the safety of ship navigation, in view of 3D (three-dimensional) visualization of navigation mark and of seabed topography. The main contribution lies in two aspects. One is for 3D visualization of aids to navigation, the other is for 3D visualization of seabed topography. From the electronic chart and S-57 data, the shape, color, top mark and luminous characteristics of the navigation mark are extracted. Compared with the previous methods, the simulation on Visual Studio shows that the 3D scene can provide more visual and clear information to the ships. The depth data of electronic chart is extracted and processed, and then the irregular triangular grid is constructed by Delaunay triangular grid method. The two aspects of study, mainly use the corresponding data information to complete the goal of building 3D scene automatically and quickly.
基于航标和海底地形的三维可视化,探讨船舶航行的安全性。主要贡献在两个方面。一个是航标的三维可视化,另一个是海底地形的三维可视化。从电子海图和S-57数据中提取航标的形状、颜色、顶标和发光特征。与以往的方法相比,在Visual Studio上的仿真结果表明,三维场景可以为船舶提供更直观、更清晰的信息。对电子海图深度数据进行提取和处理,然后采用Delaunay三角网格法构造不规则三角网格。这两个方面的研究,主要是利用相应的数据信息来完成自动快速构建三维场景的目标。
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引用次数: 0
Information Hiding Algorithm Based on Spherical Segmentation of 3D Model 基于球面分割的三维模型信息隐藏算法
Shuai Ren, Jie Xu, Qianqian Zhang, Lei Shi, Xuemei Lei, Zhuoyi Dan
For the problem of poor robustness of geometric attack based on 3D model information hiding algorithm, an information hiding algorithm based on 3D model spherical segmentation is proposed. The algorithm firstly uses the principal component analysis, spherical coordinate conversion, spherical segmentation, partition sorting, etc. to preprocess the 3D model, calculates the points with large normal vector changes in the three-dimensional partition as the feature points, and matches the feature points according to the amount of secret information to be embedded After wavelet transform, the secret information after the scrambling operation is embedded in the pre-processed carrier to generate a dense three-dimensional model. Experimental results show that the algorithm is invisible and has good robustness to rotation, random noise, heavy mesh, and other common attacks.
针对基于三维模型信息隐藏算法对几何攻击鲁棒性差的问题,提出了一种基于三维模型球面分割的信息隐藏算法。该算法首先采用主成分分析、球面坐标转换、球面分割、分区排序等方法对三维模型进行预处理,计算出三维分区中法向量变化大的点作为特征点,并根据要嵌入的秘密信息量对特征点进行匹配。将置乱后的秘密信息嵌入到预处理的载体中,生成密集的三维模型。实验结果表明,该算法具有不可见性,对旋转、随机噪声、重网格等常见攻击具有良好的鲁棒性。
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引用次数: 2
Two-stage Airplane Detection with NMS Filtering in Remote Sensing Images 基于NMS滤波的两级飞机遥感图像检测
Yucheng Song, J. Tian
In the past few years, object detection based on deep learning have attracted attention from more and more organizations and researchers. Compared to one-stage object detection methods, two-stage methods would display a better performance of accuracy and precision. As airplane detection is a basic task in remote sensing images, we propose an airplane-detection method based Faster R-CNN and Feature Pyramid Networks (FPN), with Non-maximum Suppression (NMS) postprocessing. The Faster R-CNN is the most widely used two-stage detection framework, and is still the mainstream box-detection method in many famous detection research platforms like Detectron2 and MMDetection. For the various sizes of airplanes objects, the FPN is used as an excellent technique in recognition systems for detecting objects at different scales. Due to the prominent similarity between different classes of airplanes, the naive two-stage method would yield many duplicate boxes of multiple airplane classes for one object. To improve the recall and precision of the detection model, an NMS Filtering is proposed to prevent the phenomenon of multiple duplicate boxes for one object. The experiment showed that our method is able to accomplish the task in remote sensing for the detection and recognition of airplanes in 24 different classes including helicopter and wing aircrafts, and the NMS postprocessing would have a positive influence on improving the recall and mean average precision (mAP) metrics. The future work would be expanded on improving the precision of classification task.
在过去的几年里,基于深度学习的目标检测受到了越来越多的组织和研究人员的关注。与单阶段目标检测方法相比,两阶段目标检测方法具有更好的准确性和精密度。由于飞机检测是遥感图像的一项基本任务,我们提出了一种基于Faster R-CNN和特征金字塔网络(FPN)的飞机检测方法,并进行了非最大抑制(NMS)后处理。Faster R-CNN是应用最广泛的两阶段检测框架,在Detectron2、MMDetection等众多著名的检测研究平台中仍是主流的箱检方法。对于不同尺寸的飞机目标,FPN是识别系统中检测不同尺度目标的一种优秀技术。由于不同类别的飞机之间具有显著的相似性,朴素的两阶段方法会对一个对象产生多个飞机类别的重复框。为了提高检测模型的查全率和查准率,提出了一种NMS过滤方法来防止一个对象出现多个重复框的现象。实验表明,该方法能够完成包括直升机和翼机在内的24种不同类别飞机的遥感检测和识别任务,并且NMS后处理对提高查全率和平均精度(mAP)指标有积极的影响。今后的工作将在提高分类任务的精度方面展开。
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引用次数: 0
Conditional Generation of Adversarial Networks Based on Multiple Generators 基于多生成器的对抗网络条件生成
Dunlang Luo, Min Jiang, Jiabao Guo
Conditional generative adversarial network are widely used in image translation and many other fields. However, traditional conditional generative adversarial networks have the problem of model collapse. To solve this problem, we proposed a conditional generative adversarial network model based on multiple generators. It uses multiple generators to obtain multiple outputs, and adds a distance constraint between multiple generators to output multimodal results. Experiments on Edges2Shoes and Facade datasets show that the diversity distance index LPILS between generated images can be effectively increased with our method. In addition, it also has good results in coloring application scenarios.
条件生成对抗网络广泛应用于图像翻译等领域。然而,传统的条件生成对抗网络存在模型崩溃的问题。为了解决这一问题,我们提出了一种基于多生成器的条件生成对抗网络模型。它使用多个生成器获得多个输出,并在多个生成器之间添加距离约束以输出多模态结果。在Edges2Shoes和Facade数据集上的实验表明,该方法可以有效地提高生成图像之间的多样性距离指数LPILS。此外,它在着色应用场景中也有很好的效果。
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引用次数: 0
Performance Evaluation of Full Turnover-based Policy in the Flow-rack AS/RS Flow-rack AS/RS中基于全流动率策略的性能评价
Meng Zhao, Zhuxi Chen
In a flow-rack AS/RS, unit-loads to be stored slide from the storage face to the retrieval face driven by the gravity, which lets stored unit-loads follow the first-in-first-out rule in each bin. Consequently, a requested unit-load might be blocked by blocking unit-loads stored in front of it. Blocking unit-loads require extra cost to be removed and restored before retrieving requested ones. Full turnover-based (FTB) storage policy can be employed in flow-rack AS/RS, in which each bin contains the same type of unit-loads to ensure the avoidance of blocking unit-loads when systems request a unit-load. In this paper, the performance of FTB policy is evaluated for the flow-rack AS/RS, which is compared to the in-deep storage policy. Because in-deep storage policy takes a lot of time to deal with blocking unit-loads, we can see whether FTB policy without blocking unit-loads performs better than in-deep storage policy with the same external conditions.
在流架AS/RS中,被存储的单元负载在重力的驱动下从存储面滑动到检索面,这使得存储的单元负载在每个仓中遵循先进先出的规则。因此,请求的单元加载可能会被存储在它前面的单元加载阻塞。阻塞的单元负载需要在检索请求的单元负载之前移除和恢复额外的成本。在流机架AS/RS中可以采用基于全周转的存储策略,其中每个仓包含相同类型的单元负载,以确保当系统请求单元负载时避免阻塞单元负载。本文对流机架AS/RS的FTB策略进行了性能评价,并与深度存储策略进行了比较。由于深度存储策略处理阻塞单元负载需要花费大量时间,因此我们可以看到在相同外部条件下,不阻塞单元负载的FTB策略是否比深度存储策略性能更好。
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引用次数: 0
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Proceedings of the 4th International Conference on Computer Science and Application Engineering
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