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Age-Optimal Data Gathering and Energy Recharging of UAV in Wireless Sensor Networks 基于无线传感器网络的无人机年龄优化数据采集与能量充电
Chen Zhang, Juan Liu, Lingfu Xie, Xiaofan He
Unmanned aerial vehicle (UAV) can act as an aerial data collector to efficiently gather fresh information in wireless sensor networks (WSNs). To support continuous data collection, the battery-powered UAV should be able to obtain energy supplements in time. In this paper, we propose a joint data gathering and energy recharging framework for age minimization in UAV-enabled WSNs. To discuss the impacts of the deployments of ground terminals and charging stations on the network age, we assume that the UAV’s action follows a stochastic policy. It flies from one terminal to another with some probability when its on-board energy is sufficient, otherwise flies to the nearest charging station to recharge its battery. The UAV-aided data collection problem with energy recharging is modeled as a non-linear optimization problem. With the aid of convex programming, a stochastic optimal policy is found to minimize the network peak age. Simulation results show that the network peak age performance is greatly affected by the intensities of the ground terminals and charging stations.
在无线传感器网络中,无人机(UAV)可以作为空中数据采集器,有效地收集新信息。为了支持连续的数据采集,电池供电的无人机应该能够及时获得能量补充。在本文中,我们提出了一个联合数据收集和能量充电框架,用于最小化无人机启用的WSNs的年龄。为了讨论地面终端和充电站的部署对网络时代的影响,我们假设无人机的行动遵循随机策略。当它的机载能量足够时,它有一定的概率从一个终端飞到另一个终端,否则它会飞到最近的充电站给电池充电。将具有能量补给的无人机辅助数据采集问题建模为非线性优化问题。借助于凸规划,找到了网络峰值年龄最小的随机最优策略。仿真结果表明,网络峰龄性能受地面终端和充电站强度的影响较大。
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引用次数: 1
Comparing the Popularity of Testing Careers among Canadian, Indian, Chinese, and Malaysian Students 比较测试职业在加拿大、印度、中国和马来西亚学生中的受欢迎程度
Luiz Fernando Capretz, P. Waychal, Jingdong Jia, S. Basri
This study attempts to understand motivators and de-motivators that influence the decisions of software students to take up and sustain software testing careers across four different countries, Canada, India, China, and Malaysia. Towards that end, we have developed a cross-sectional, but simple, survey-based instrument. In this study we investigated how software engineering and computer science students perceive and value what they do and their environmental settings. This study found that very few students are keen to take up software testing careers - why is this happening with such an important task in the software life cycle? The common advantages of a software testing career are learning opportunities and easiness of the job and the common drawbacks are tediousness, complexity, and missing the opportunity to do (software) development. Our findings highlight the importance of depicting software testing activities as a set of human-dependent tasks, and emphasizes the need for research that critically examines the way in which software testers view testing activities.
本研究试图理解影响软件专业学生在四个不同国家(加拿大、印度、中国和马来西亚)从事和维持软件测试职业的决定的激励因素和不激励因素。为此,我们开发了一种横截面的,但简单的,基于调查的工具。在这项研究中,我们调查了软件工程和计算机科学的学生如何感知和重视他们所做的事情和他们的环境设置。这项研究发现,很少有学生热衷于从事软件测试工作——为什么在软件生命周期中如此重要的任务会发生这种情况?软件测试职业的共同优点是学习机会和工作的简单性,而共同的缺点是乏味、复杂和错过进行(软件)开发的机会。我们的发现强调了将软件测试活动描述为一组依赖人类的任务的重要性,并强调了对软件测试人员看待测试活动的方式进行批判性检查的研究的必要性。
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引用次数: 0
Research on Fermented Grains Steam Running Condition Prediction Model of Make Chinese Liquor Robot Based on GRU 基于GRU的酿酒机器人酒糟蒸汽工况预测模型研究
Jie Zhang, Zipeng Zhang
This specification is set for the theses to be published in Computer Applications and Software, including fonts, margins, page size and print area. Distillation is the key step in Chinese liquor brewing, accurate prediction of fermented grains Steam Running Condition plays an important role in the process of accurate gas exploration, when there are several areas on the surface of fermented grains running off, the robot on the steamer cannot complete the spreading operation in time, which is easy to cause wine loss and directly affect the quality of wine. To solve this problem, Fermented Grains Steam Running Condition Prediction Model of Make Wine Robot Based on GRU recurrent neural network was proposed. It used historical Steam Running Condition information of fermented grains and Hough transform to extract the Steam Running Condition data of fermented grains and find out the important factors that affect the Steam Running Condition of fermented grains. The Bayesian optimization algorithm is used to search for the optimal parameters, we built GRU Steam Running Condition Prediction Model to achieve accurate prediction of Steam Running Condition. We used the relevant data of the steaming process in Jinpai distillery. The results show that the model can better predict the variation trend of Fermented Grains Steam Running Condition.
本规范是为发表在《计算机应用与软件》上的论文设置的,包括字体、页边距、页面大小和打印面积。蒸馏是我国白酒酿造的关键步骤,准确预测酒糟蒸汽运行状态在准确找气过程中起着重要作用,当酒糟表面有多个区域流出时,蒸笼上的机器人无法及时完成铺展操作,容易造成酒液损失,直接影响酒的质量。为解决这一问题,提出了基于GRU递归神经网络的酿酒机器人发酵谷物蒸汽运行状态预测模型。利用历史发酵谷物蒸汽运行工况信息和霍夫变换提取发酵谷物蒸汽运行工况数据,找出影响发酵谷物蒸汽运行工况的重要因素。采用贝叶斯优化算法搜索最优参数,建立GRU蒸汽运行工况预测模型,实现对蒸汽运行工况的准确预测。我们采用了金牌酒厂蒸制过程的相关数据。结果表明,该模型能较好地预测发酵粮蒸汽运行工况的变化趋势。
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引用次数: 3
Cloud-Based Smart Energy Framework for Accelerated Data Analytics with Parallel Computing of Orchestrated Containers: Study Case of CU-BEMS 协同容器并行计算加速数据分析的基于云的智能能源框架:CU-BEMS研究案例
Kittipat Saengkaenpetch, C. Aswakul
This paper proposes a practical smart energy framework for data analytic on energy management system at Chulalongkorn University, called CU-BEMS. This serves as an example of demand-sided smart energy application that copes with the challenges of big data analytic and real-time processing needs. The framework is based on the divide and conquer paradigm to accelerate data analytics with parallel computing. The workload is containerized and deployed on the Kubernetes cloud facility of our internationally collaborated IoTcloudServe@TEIN playground. With this playground, the workload scalability and portability can be achieved. Applying the proposed framework, this paper reports on a practical data log analysis to determine the wasted energy consumption. Based on the experimental result, the wasted energy consumption of the whole data set of CU-BEMS's communication research laboratory area from March 2014 to August 2017 can be computed within 81 seconds by using 32 cores running in parallel. The framework is expected to serve as a basis template for further research ongoing at CU-BEMS and smart energy applications that can be computationally enhanced by data analytic pipelining with containerized services as orchestrated by Kubernetes.
本文提出了一个实用的智能能源框架,用于朱拉隆功大学能源管理系统的数据分析,称为CU-BEMS。这是应对大数据分析和实时处理需求挑战的需求侧智能能源应用的一个例子。该框架基于分而治之的范式,通过并行计算加速数据分析。工作负载被容器化并部署在我们国际合作的IoTcloudServe@TEIN游乐场的Kubernetes云设施上。有了这个平台,就可以实现工作负载的可伸缩性和可移植性。应用所提出的框架,本文报告了一个实际的数据日志分析,以确定浪费的能源消耗。基于实验结果,采用32核并行运行,可以在81秒内计算出CU-BEMS通信研究实验室区域2014年3月至2017年8月整个数据集的浪费能耗。该框架有望作为CU-BEMS和智能能源应用的进一步研究的基础模板,这些应用可以通过Kubernetes编排的容器化服务的数据分析流水线进行计算增强。
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引用次数: 0
Rapid Identification of Multiple Gases 多种气体的快速识别
Juan He, Mengya Li, Ronghe Zhou, Li Ning, Yan Liang
Rapid identification of low-leveled toxic and harmful gases is of a challenge in current environmental monitoring. In this paper, we combined convolutional neural networks and bidirectional long short-term memory neural network, and proposed a method for fast identifying gases existing in trace amount in the environment. The attention mechanism was introduced to extract the key features of the input, and the Bayesian optimization method was applied to optimize the hyper-parameters. In order to evaluate the proposed method, we ran experiments using the low-concentration gas sensing data employing several existing predictive methods and the proposed one, and eventually compared their performances with recall and F1-score metrics. The results demonstrate that the performance of the proposed method exceeds that of the other methods, and also gives better performance on classifying gas components, given the gas concentration is below 125 ppm and the response time is limited to 0.5s.
低浓度有毒有害气体的快速识别是当前环境监测中的一个挑战。本文将卷积神经网络与双向长短期记忆神经网络相结合,提出了一种快速识别环境中微量气体的方法。引入注意机制提取输入的关键特征,采用贝叶斯优化方法对超参数进行优化。为了评估本文提出的方法,我们使用几种现有的预测方法和本文提出的方法在低浓度气体传感数据上进行了实验,并最终将它们的性能与召回率和f1评分指标进行了比较。结果表明,在气体浓度低于125 ppm、响应时间限制在0.5s的情况下,该方法的性能优于其他方法,在气体组分分类方面也有较好的表现。
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引用次数: 2
Perspective on Intelligent Sensing System 智能传感系统展望
Linxi Li
With rapid development of artificial intelligence, cognitive technology and big data technology, intelligent sensing system has attracted extensive attention of researchers at home and abroad. This paper studies the related development status of intelligent sensing technology, puts forward the basic concept, system framework and technical characteristics of intelligent sensing system, and analyzes the related enabling key technologies.
随着人工智能、认知技术和大数据技术的快速发展,智能传感系统引起了国内外研究者的广泛关注。本文研究了智能传感技术的相关发展现状,提出了智能传感系统的基本概念、系统框架和技术特点,并分析了相关的使能关键技术。
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引用次数: 1
Preliminary Study of Secure-Enhanced Coherent Optical Orthogonal Frequency Division Multiplexing System Based on DNA Encoding 基于DNA编码的安全增强相干光正交频分复用系统的初步研究
Ruyun Zhang
With the increasing demand for optical fiber communication technology, the coherent orthogonal frequency division multiplexing (CO-OFDM) system, which combines the advantages of orthogonal frequency division multiplexing (OFDM) and coherent detection, and has the characteristics of long communication distance and large communication capacity, has attracted more and more attention. With the continuous progress of optical fiber communication technology, the methods of eavesdropping are also increasing, which makes researchers must pay attention to improving its security. Physical layer encryption is one of the important means to improve the security of communication system, and DNA encryption algorithm, as a new encryption method with high encryption degree in physical layer encryption algorithm, has a high research value. This report first introduces the research background of CO-OFDM system and DNA algorithm, then discusses and designs the idea of DNA encryption algorithm for CO-OFDM system, and finally focuses on the structure of CO-OFDM system based on DNA encryption, uses MATLAB and optisystem software to simulate the system, analyzes the output results of the simulation, and in view of the shortcomings of the current system, the direction of further optimization of the system is put forward.
随着人们对光纤通信技术需求的不断增加,集正交频分复用(OFDM)和相干检测优点于一体的相干正交频分复用(CO-OFDM)系统,具有通信距离远、通信容量大的特点,越来越受到人们的重视。随着光纤通信技术的不断进步,窃听的手段也在不断增多,这使得研究人员必须重视提高其安全性。物理层加密是提高通信系统安全性的重要手段之一,而DNA加密算法作为物理层加密算法中加密程度高的一种新型加密方法,具有很高的研究价值。本报告首先介绍了CO-OFDM系统和DNA算法的研究背景,然后讨论和设计了CO-OFDM系统的DNA加密算法的思想,最后重点介绍了基于DNA加密的CO-OFDM系统的结构,利用MATLAB和optisystem软件对系统进行仿真,分析了仿真的输出结果,并针对目前系统存在的不足,提出了系统进一步优化的方向。
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引用次数: 0
Evaluation Model Based on Hesitation Fuzzy Theory 基于犹豫模糊理论的评价模型
Qinghuan Rao, Bin Wu
Fuzzy mathematics is widely used in the field of multi-attribute decision making and evaluation. The extended form of fuzzy sets, hesitant fuzzy sets, has also received extensive attention in recent years. In this paper, an evaluation model is proposed to justify hesitant fuzzy linguistic term set combines hesitant fuzzy set with hierarchical analysis to construct a comparison matrix and check the matrix consistency. The fuzzy data are fused with the exact data, and then the hesitation fuzzy operator is applied to fuse the data and weights to obtain the final evaluation results. The network attack effect evaluation index system is proposed, and the network attack effect is evaluated by using the evaluation model.
模糊数学在多属性决策与评价领域有着广泛的应用。模糊集的扩展形式犹豫模糊集近年来也受到了广泛的关注。本文提出了一种评判犹豫模糊语言项集的评价模型,将犹豫模糊集与层次分析法相结合,构造比较矩阵并检验矩阵的一致性。将模糊数据与精确数据进行融合,然后利用犹豫模糊算子对数据和权重进行融合,得到最终的评价结果。提出了网络攻击效果评价指标体系,并利用评价模型对网络攻击效果进行了评价。
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引用次数: 0
A Correction Method for Attitude Measurement in Steerable Drilling System 导向钻井系统姿态测量的一种校正方法
N. Zhang, Chao Guo, Fei Li
ABSTRACT—In the attitude measurement of the steering drilling system, the axes of the sensor cannot be perfectly orthogonal, and the instrument coordinate system does not coincide with the geographic coordinate system initially, which leads to installation errors. At the same time, the measurement offsets and the inaccurate scale factor have a great impact on the accuracy of attitude angle calculation. To eliminate the above influence and improve the drilling accuracy, this method is based on the three-axis accelerometer and fluxgate to constitute the measurement system and establish the attitude correction model. This method includes measurement offsets and scale factor calculation, installation error correction matrix algorithm, and temperature compensation calculation. Experimental results show that the proposed method can effectively improve the attitude angle calculation accuracy by more than 2.6 ∼ 5.6 times, the error between inclination angle and tool face angle is less than 0.06°. The method effectively improves the attitude measurement accuracy of steering drilling tools and improves drilling efficiency. CCS CONCEPTS • Hardware • Power and energy • Energy generation and storage • Fuel-based energy
摘要在转向钻井系统的姿态测量中,由于传感器的轴线不可能完全正交,仪器的初始坐标系与地理坐标系不重合,从而导致安装误差。同时,测量偏差和不准确的尺度因素对姿态角计算的精度有很大的影响。为了消除上述影响,提高钻孔精度,该方法基于三轴加速度计和磁通门构成测量系统,建立姿态校正模型。该方法包括测量偏移量和比例因子计算、安装误差修正矩阵算法和温度补偿计算。实验结果表明,该方法能有效地将姿态角计算精度提高2.6 ~ 5.6倍以上,倾角与刀面角之间的误差小于0.06°。该方法有效地提高了导向钻具的姿态测量精度,提高了钻进效率。CCS概念•硬件•电力和能源•能源生产和储存•燃料能源
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引用次数: 0
Chinese Intention Recognition Algorithm Based on BERT-GRU-Capsule Network 基于BERT-GRU-Capsule网络的汉语意图识别算法
Yang Xia, Chaobing Huang
With the continuous development of natural language processing technology and deep learning technology, related technologies in intelligent question answering field have made rapid progress in recent years. In the application of intelligent question answering system, the research of intention recognition algorithm is very important. In fact, intention recognition corresponds to the task of multi-classification of short texts in the field of natural language processing, and the algorithm of intention recognition is directly related to the question answering effect. In this paper, a BERT-GRU-Capsule network is proposed and compared with some classical intent-recognition networks on the user intent-domain classification dataset of SMP2017-ECDT.The experimental results show that the precision, recall and f1 values of the proposed network on the test set reach 0.931, 0.925 and 0.926 respectively, and the experimental results prove that the proposed Chinese intention recognition algorithm is superior to the classical intention recognition algorithm.
随着自然语言处理技术和深度学习技术的不断发展,智能问答领域的相关技术近年来取得了长足的进步。在智能问答系统的应用中,意图识别算法的研究是非常重要的。实际上,意图识别对应于自然语言处理领域对短文本进行多分类的任务,意图识别的算法直接关系到问答效果。本文在SMP2017-ECDT用户意图域分类数据集上,提出了BERT-GRU-Capsule网络,并与经典意图识别网络进行了比较。实验结果表明,本文提出的网络在测试集上的准确率、查全率和f1值分别达到0.931、0.925和0.926,实验结果证明本文提出的中文意图识别算法优于经典意图识别算法。
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引用次数: 0
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Proceedings of the 3rd International Conference on Advanced Information Science and System
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