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Valuation Analysis of Chinese and American Listed Companies Based on Multiple Linear Regression and Grey Forecasting Model 基于多元线性回归和灰色预测模型的中美上市公司估值分析
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484308
Jinke Li, Qiang Zhang, ZhiJun Zhang, Fan Wang, Xijie Li
With the development of China's economic globalization, the stock market has gradually demonstrated its important position in the development of China's market economy. First, this paper selects the average market-to-sales ratio as the valuation level, uses an evaluation model to calculate the valuation level of the Chinese A-share market and the US NASDAQ market in 2018, and calculates the valuation premium or discount level of these two markets. Secondly, we establish a multiple linear regression model to quantitatively analyze the relationship between the valuation indicators and fundamental indicators and liquidity indicators of China A-shares and the US NASDAQ market. Then, a grey forecast model is established to predict and analyze the fundamental indicators and liquidity indicators of the Chinese A-share market and the US NASDAQ market in 2019. According to the forecast results, the valuation indicators of these two markets in 2019 are calculated. The results found that the valuation level of my country's first batch of sci-tech innovation board companies fluctuates around 5 times, which is smaller than that of the United States, indicating that China's stock market has greater potential.
随着中国经济全球化的发展,股票市场逐渐显示出其在中国市场经济发展中的重要地位。首先,本文选取平均市销比作为估值水平,利用评价模型计算2018年中国a股市场和美国纳斯达克市场的估值水平,并计算这两个市场的估值溢价或折价水平。其次,建立多元线性回归模型,定量分析中国a股与美国纳斯达克市场的估值指标与基本面指标、流动性指标之间的关系。然后,建立灰色预测模型,对2019年中国a股市场和美国纳斯达克市场的基本面指标和流动性指标进行预测分析。根据预测结果,计算出这两个市场2019年的估值指标。结果发现,我国首批科创板公司估值水平波动幅度在5倍左右,小于美国,说明中国股市潜力更大。
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引用次数: 0
Design of Patient Rehabilitation Training and Rest Monitoring Device 病人康复训练及休息监测装置的设计
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484305
Meili Liu
The rehabilitation center is a department set up by the hospital for sports medicine. When patients undergo rehabilitation training, they need to be trained and rested in strict accordance with the doctor's requirements. However, sometimes there are too many patients and the number of doctors and nurses is limited, so each patient cannot be fully taken care of. Therefore, the training of patients who do not have the concept of time or the rest time is too long or too short, which will cause unsatisfactory medical effects. The components of the patient rehabilitation training and rest time monitoring device are STM32F103C8T6 microcontroller core board, buttons, travel switch and buzzer. The status of the travel switch distinguishes whether the patient is resting (lying down or sitting down) or training (standing). The function of the button is to set the patient's training and rest time. When the patient's training time does not reach the specified value, if the patient is resting, the buzzer will alarm and monitor the rest time. If the patient is training at this time, the buzzer will not act and monitor the training time; when the patient's rest time reaches the specified value, the beeper The buzzer will alarm and monitor the rest time. If the patient is training at this time, the buzzer will not act and monitor the training time.
康复中心是医院设立的运动医学部。患者在接受康复训练时,需要严格按照医生的要求进行训练和休息。然而,有时病人太多,医生和护士的数量有限,所以每个病人都不能得到充分的照顾。因此,对没有时间观念的患者进行培训或休息时间过长或过短,都会造成不理想的医疗效果。患者康复训练及休息时间监测装置的组成部分为STM32F103C8T6单片机核心板、按键、行程开关和蜂鸣器。行走开关的状态区分病人是休息(躺下或坐着)还是训练(站着)。按钮的功能是设置患者的训练和休息时间。当患者的训练时间未达到设定值时,如果患者处于休息状态,蜂鸣器会报警并监测休息时间。如果此时患者正在训练,则蜂鸣器不行动,监控训练时间;当病人的休息时间达到设定值时,蜂鸣器报警并监测休息时间。如果此时患者正在训练,蜂鸣器将不行动并监控训练时间。
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引用次数: 0
Automatic Acne Classification using VISIA 使用VISIA自动痤疮分类
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484291
Yuxuan Wang, Annan Li, Chengxu Li, Yong Cui
Acne is an incredibly common skin condition caused by oil from clog hair follicles and dead skin. It is usually found in adolescence to young adulthood and may affects people of all ages. The diagnosis of acne usually requires manual examination by a well-trained dermatologist, which can take a lot of effort. Therefore, it is necessary to design an automatic classification algorithm for acne lesion. However, due to the lack of proper imaging method, acne-specific facial image analysis is still a difficult task. To address this issue we propose a novel approach using high-definite VISIA image. By incorporating better image and better models, an overall accuracy above 80% is achieved on a large-scale dataset consists of more than one thousand people. The results imply that automatic acne classification is a promising direction.
痤疮是一种非常常见的皮肤状况,由堵塞的毛囊和死皮引起。它通常发生在青春期到青年期,可能影响所有年龄段的人。痤疮的诊断通常需要由训练有素的皮肤科医生进行人工检查,这可能会花费很多精力。因此,有必要设计一种痤疮病变的自动分类算法。然而,由于缺乏合适的成像方法,痤疮特异性面部图像分析仍然是一项艰巨的任务。为了解决这一问题,我们提出了一种利用高清晰度VISIA图像的新方法。通过结合更好的图像和更好的模型,在超过1000人的大规模数据集上实现了80%以上的总体精度。结果表明,痤疮自动分类是一个很有前途的方向。
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引用次数: 1
Temporal-Aware Graph Convolution Network for Skeleton-based Action Recognition 基于骨架的动作识别的时间感知图卷积网络
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484288
Yulai Xie, Yang Zhang, Fang Ren
Graph convolutions networks (GCN) have drawn attention for skeleton-based action recognition because a skeleton with joints and bones can be naturally regarded as a graph structure. However, the existing methods are limited in temporal sequence modeling of human actions. To consider temporal factors in action modeling, we present a novel Temporal-Aware Graph Convolution Network (TA-GCN). First, we design a causal temporal convolution (CTCN) layer to ensure no impractical future information leakage to the past. Second, we present a novel cross-spatial-temporal graph convolution (3D-GCN) layer that extends an adaptive graph from the spatial to the temporal domain to capture local cross-spatial-temporal dependencies among joints. Involving the two temporal factors, TA-GCN can model the sequential nature of human actions. Experimental results on two large-scale datasets, NTU-RGB+D and Kinetics-Skeleton, indicate that our network achieves accuracy improvement (about 1% on the two datasets) over previous methods.
图卷积网络(GCN)在基于骨骼的动作识别中引起了人们的关注,因为具有关节和骨骼的骨骼可以自然地视为一个图结构。然而,现有的方法在人类行为的时间序列建模方面存在局限性。为了考虑动作建模中的时间因素,我们提出了一种新的时间感知图卷积网络(TA-GCN)。首先,我们设计了一个因果时间卷积(CTCN)层,以确保不向过去泄露不切实际的未来信息。其次,我们提出了一种新的跨时空图卷积(3D-GCN)层,该层将自适应图从空间域扩展到时间域,以捕获关节之间的局部跨时空依赖关系。涉及这两个时间因素,TA-GCN可以模拟人类活动的顺序性质。在NTU-RGB+D和Kinetics-Skeleton两个大型数据集上的实验结果表明,我们的网络比以前的方法获得了精度提高(在两个数据集上约1%)。
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引用次数: 0
Learning Highlight Separation of Real High Resolution Portrait Image 学习突出分离真正的高分辨率肖像图像
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484278
Ruikang Ju, Dongdong Weng, Bin Liang
∗This work presents an approach for highlight separation of real high resolution portrait image. In order to obtain reliable ground truth of real images, a controllable portrait image collection system with 156 groups of light sources has been built. It has 4 cameras to collect the portrait images of 36 subjects from different angles, and then we use 4 data processing strategies on these images to obtain 4 training datasets. Based on these datasets, 4 U-Net networks are trained by using a single image as input. To test and evaluate, we input the 2560*2560 resolution images into 4 models, and finally determine the best data processing strategy and trained network. Our method creates precise and believable highlight separation results for 2560*2560 high resolution images, including when the subject is not looking straight at the camera.
*这项工作提出了一种真正的高分辨率肖像图像的高光分离方法。为了获得真实图像可靠的地面真实度,构建了包含156组光源的可控人像图像采集系统。它有4个摄像头,从不同角度采集36个被试的人像图像,然后我们对这些图像使用4种数据处理策略,得到4个训练数据集。基于这些数据集,使用单个图像作为输入来训练4个U-Net网络。为了测试和评估,我们将2560*2560分辨率的图像输入到4个模型中,最终确定最佳的数据处理策略和训练好的网络。我们的方法为2560*2560高分辨率图像创建精确可信的高光分离结果,包括当主体不直视相机时。
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引用次数: 0
Braille Recognition Using Deep Learning 使用深度学习的盲文识别
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484280
Changjian Li, Weiqi Yan
Text is the media to convey and transmit information. Braille is extremely important for vision impaired people to exchange information through reading and writing. A braille translator is crucial tool for aiding people to understand braille messages. In this paper, we implement character-based braille translator using ResNet, there are three versions of ResNet we implement for braille classifiers, including ResNet-18, ResNet-34, and ResNet-50. We also implement a word-based braille detector using a novel solution called Adaptive Bezier-Curve Network (ABCNet), which is a Scene Text Recognition (STR) method for detecting word-based text in natural scenes. A comparison is present to evaluate the performance of ABCNet.
文本是传递和传递信息的媒介。盲文对于视障人士通过阅读和写作来交流信息是极其重要的。盲文翻译器是帮助人们理解盲文信息的关键工具。在本文中,我们使用ResNet实现基于字符的盲文翻译器,我们为盲文分类器实现了三个版本的ResNet,包括ResNet-18, ResNet-34和ResNet-50。我们还使用一种称为自适应贝塞尔曲线网络(ABCNet)的新颖解决方案实现了基于单词的盲文检测器,这是一种用于检测自然场景中基于单词的文本的场景文本识别(STR)方法。通过比较,对ABCNet的性能进行了评价。
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引用次数: 1
Research on Recognition of Working Area and Road Garbage for Road Sweeper Based on Mask R-CNN Neural Network 基于掩模R-CNN神经网络的清扫车工作区域及道路垃圾识别研究
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484287
Teng Liu, Xuexun Guo, Xiaofei Pei
In order to reduce the energy waste of the road sweeper and simplify the operation process of the driver, a set of intelligent cleaning device for road sweeper is designed, which can automatically identify road garbage and adjust the cleaning mechanism to the required power. This device is composed by a monocular camera, an industrial computer, a vehicle DC power, and a cleaning mechanism. In terms of algorithms, two Mask R-CNN neural network models are used to detect road garbage. First, the road surface information is obtained by the first model to obtain the workable area of the road sweeper, which can reduce the influence of factors such as vehicles and pedestrians. Secondly, the road surface information in the workable area is divided into two types, road-specific information and garbage, the garbage detection and marking are completed after the second model is tested. Finally, the garbage coverage rate is used as a feature to adjust the power of the cleaning device. The result of testing and analysis of this algorithms shows that the real-time performance and recognition accuracy can achieve the expected results.
为了减少扫地车的能源浪费,简化驾驶员的操作流程,设计了一套扫地车智能清扫装置,能够自动识别道路垃圾,并将清扫机构调整到所需功率。该装置由单目摄像机、工业计算机、车载直流电源和清洗机构组成。算法方面,采用两种Mask R-CNN神经网络模型对道路垃圾进行检测。首先,通过第一个模型获取路面信息,得到清扫车的工作区域,可以减少车辆、行人等因素的影响。其次,将可工作区域的路面信息分为道路专用信息和垃圾两种类型,在第二种模型测试后完成垃圾检测和标记。最后,以垃圾覆盖率作为特征来调节清洗装置的功率。对该算法的测试和分析结果表明,该算法的实时性和识别精度都达到了预期的效果。
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引用次数: 1
Research on Testing System of Networked Heterogeneous Computing Resource Platform 网络化异构计算资源平台测试系统研究
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484303
Yanan Yang, Yan Gao, Zhenhao Xu
With the growth of the information technology field, machine learning, artificial intelligence and other fields have begun to require higher computing performance. Networked heterogeneous computing is one of the critical solutions for them. The hardware composition, software design and use methods in the Networked Heterogeneous Computing Platform are quite different from those in the traditional computing platform. There is no mature test method or testing system at present. Therefore, this paper studies the Networked Heterogeneous Computing Platform, from the composition of the platform to the construction of the testing system. The testing system of Networked Heterogeneous Computing Platform is proposed, and each test indicator is discussed in detail. Finally, the test method is provided.
随着信息技术领域的发展,机器学习、人工智能等领域开始对计算性能提出更高的要求。网络异构计算是解决这些问题的关键解决方案之一。网络异构计算平台的硬件组成、软件设计和使用方法与传统计算平台有很大的不同。目前还没有成熟的测试方法或测试系统。因此,本文对网络化异构计算平台进行了研究,从平台的组成到测试系统的构建。提出了网络化异构计算平台的测试系统,并对各测试指标进行了详细讨论。最后给出了测试方法。
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引用次数: 0
Prediction of the Cyanobacteria Coverage in Time-series Images based on Convolutional Neural Network 基于卷积神经网络的时间序列图像蓝藻覆盖预测
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484298
Xiangyu Ye, Zhiquan Lai, Dongsheng Li
In recent years, the problem of lake eutrophication has become increasingly severe. The monitoring and control of cyanobacteria in lakes are of great significance. The information obtained by existing monitoring methods is relatively lagging, and it is impossible to monitor the sudden outbreak of cyanobacteria in time. Getting cyanobacteria information directly through camera images is a breakthrough. In this paper, after analyzing the characteristics of time series cyanobacteria images, we propose a block prediction scheme based on the CNN model. Experiments show that this method can quickly calculate the coverage of cyanobacteria in the monitoring image in a short time. It can also effectively distinguish cyanobacteria-rich water areas, which significantly facilitates water quality monitoring and cyanobacteria management. We can draw a chart of the changes in the coverage of cyanobacteria by analyzing multi-day time-series images. The chart helps us conduct a short-term water quality analysis to better deal with the outbreak of cyanobacteria.
近年来,湖泊富营养化问题日益严重。湖泊蓝藻的监测与控制具有重要意义。现有监测方法获得的信息相对滞后,无法及时监测蓝藻菌的突然爆发。通过相机图像直接获取蓝藻信息是一个突破。本文在分析时间序列蓝藻图像特征的基础上,提出了一种基于CNN模型的分块预测方案。实验表明,该方法可以在短时间内快速计算出监测图像中蓝藻的覆盖率。它还可以有效地区分富含蓝藻的水域,为水质监测和蓝藻管理提供了极大的便利。通过分析多天时间序列图像,我们可以绘制蓝藻覆盖范围变化的图表。这张图表帮助我们进行短期水质分析,以更好地应对蓝藻的爆发。
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引用次数: 1
Comparisons of Eight Simplification Methods for Data Reduction of Terrain Point Cloud 地形点云数据约简的八种简化方法比较
Pub Date : 2021-08-13 DOI: 10.1145/3484274.3484307
Yuan Fang, L. Fan
In recent years, the applications of 3D point cloud data representing terrain surfaces have been growing rapidly. Such data typically have a very fine spatial resolution, which can lead to computational and visualisation issues. To overcome these issues, it is a common practice to reduce the density of point cloud data during initial data processing. As such, various simplification methods had been developed and used in practice. The choice of those methods is crucial to preserve features and shapes of the terrain in the simplified point cloud data. Previous studies on this matter were focused mainly on the methods commonly used in geosciences, but did not consider those in computer graphics. In this study, a total of eight simplification methods that are used widely in both geosciences and computer graphics were compared and analyzed using four sets of terrain surface point cloud data. In addition, unlike previous studies where a global RMSE (root mean squared error) was used as the metric for comparing different methods, the standard deviation of local RMSEs (root mean squared errors) was also calculated in this study to check the uniformity of local RMSEs over the whole terrain areas considered. The results show that the adaptive sampling method yielded thinned point cloud data of higher overall accuracy and more consistent local RMSEs than those obtained using the other methods considered.
近年来,三维点云数据表示地形表面的应用发展迅速。这些数据通常具有非常精细的空间分辨率,这可能导致计算和可视化问题。为了克服这些问题,通常的做法是在初始数据处理过程中降低点云数据的密度。因此,各种简化方法已经发展并在实践中使用。这些方法的选择对于在简化的点云数据中保持地形的特征和形状至关重要。以前对这一问题的研究主要集中在地球科学中常用的方法上,而没有考虑到计算机图形学中的方法。本研究利用4组地形表面点云数据,对地球科学和计算机图形学中广泛使用的8种简化方法进行了比较和分析。此外,与以往研究中使用全局RMSE(均方根误差)作为比较不同方法的度量不同,本研究还计算了局部RMSE(均方根误差)的标准差,以检查所考虑的整个地形区域的局部RMSE的均匀性。结果表明,自适应采样方法得到的点云数据整体精度更高,局部均方根误差更一致。
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引用次数: 0
期刊
Proceedings of the 4th International Conference on Control and Computer Vision
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