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Reversible data hiding in encrypted domain based on color image channel correlation 基于彩色图像通道相关的加密域可逆数据隐藏
Yu Ge, Minqing Zhang, Pan Yang
Nowadays, due to the increasing need for cloud storage and cloud computing services, digital images need to be kept confidential in order to secure the privacy of individuals' information. Since the currently available codomain reversible data masking techniques are based on gray images, this paper introduces a data masking approach using color image channel correlation to achieve codomain reversibility. In the encryption stage, the security and homomorphism of encryption are achieved through XOR encryption and block scrambling. The data hiding processed by making full use of the texture information data of the reference channel to predict the pixel data more accurately, and an adaptive prediction error expansion technique is used to embed the encrypted information into the R, G, and B channels. The experimental results prove that the method has better security and better performance than the existing algorithms.
如今,由于对云存储和云计算服务的需求越来越大,为了保护个人信息的隐私,数字图像需要保密。由于目前可用的上域可逆数据掩蔽技术是基于灰度图像的,本文介绍了一种利用彩色图像通道相关实现上域可逆性的数据掩蔽方法。在加密阶段,通过异或加密和块置乱来实现加密的安全性和同态性。充分利用参考通道的纹理信息数据进行数据隐藏处理,更准确地预测像素数据,并采用自适应预测误差扩展技术将加密信息嵌入R、G、B通道。实验结果表明,该方法比现有算法具有更好的安全性和性能。
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引用次数: 0
A continual encrypted traffic classification algorithm based on WGAN 基于WGAN的连续加密流分类算法
Xiuli Ma, Wenbin Zhu, Yanliang Jin, Yuan Gao
With the constant updating of applications and the emergence of various encryption technologies, a large amount of new encrypted network traffic is generated every day. Therefore, it is a challenging task to achieve continual learning of encrypted traffic. Existing encrypted traffic classification techniques can only handle a fixed number of traffic classes, which is not applicable to real network environments. In this paper, we proposed a continual encrypted traffic classification method based on WGAN, called CETC. The method takes advantage of the powerful data generation capabilities of WGAN to model the data distribution of encrypted traffic. When learning from a new traffic class, the samples from the old class is generated by WGAN to train the new classifier. We use the ISCX VPN-nonVPN dataset to test the performance of CETC. Experimental results show that WGAN can generate high-quality samples of encrypted traffic and the accuracy of CETC is higher than 93%. With its efficient and continual learning capability, CETC can be applied to various encrypted traffic detection and management systems.
随着应用程序的不断更新和各种加密技术的出现,每天都会产生大量新的加密网络流量。因此,如何实现对加密流量的持续学习是一项具有挑战性的任务。现有的加密流分类技术只能处理固定数量的流分类,不适合实际网络环境。本文提出了一种基于WGAN的连续加密流量分类方法CETC。该方法利用WGAN强大的数据生成能力,对加密流量的数据分布进行建模。当从一个新的流量类中学习时,WGAN从旧的流量类中生成样本来训练新的分类器。我们使用ISCX vpn -非vpn数据集来测试CETC的性能。实验结果表明,WGAN能够生成高质量的加密流量样本,CETC的准确率高于93%。CETC具有高效和持续学习的能力,可应用于各种加密流量检测和管理系统。
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引用次数: 0
A bi-level structured classifier integrating unsupervised and supervised machine learning models 集成无监督和有监督机器学习模型的双层结构化分类器
Yichen Liu, Zitong Zhang, Chunlei Zhang, Kaiwen Zhang
In this paper, we propose a bi-level structured classifier integrating unsupervised and supervised machine learning models, which aims to improve the model's decision-making ability on classification boundaries by dividing the sample subspace to make full use of the multivariate attribute features and spatial structure of the data. The bi-level structured classifier utilizes the unsupervised clustering algorithms for subspace partitioning of sample data in the first layer, and selects the applicable supervised models to learn on the subspace samples in the second layer. We conduct a case study on a lithology dataset from the complex carbonate reservoirs for lithology identification. The classification results indicate that the bi-level integrated classifier (98.77%) is superior to the machine learning models (XGBoost: 97.67 %). And the ability of the bi-level integrated architecture is verified in effectiveness and generalization, and effectively improves the classification performance.
本文提出了一种集成无监督和有监督机器学习模型的双层结构化分类器,通过划分样本子空间,充分利用数据的多元属性特征和空间结构,提高模型在分类边界上的决策能力。双层结构化分类器在第一层利用无监督聚类算法对样本数据进行子空间划分,在第二层选择适用的监督模型对子空间样本进行学习。我们对复杂碳酸盐岩储层的岩性数据集进行了案例研究,以进行岩性识别。分类结果表明,双层次集成分类器(98.77%)优于机器学习模型(XGBoost: 97.67%)。验证了双层集成体系结构的有效性和泛化能力,有效地提高了分类性能。
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引用次数: 0
Nonradiative infrared thermography detection based on artificial intelligence analysis replaces traditional CT detection 基于人工智能分析的非辐射红外热像检测取代了传统的CT检测
Jiaqi Chen, X. Su, Jingyi Gong, Ruihan Hu
CT examination utilizes computational functions to achieve tomography of the human body based on the basic characteristics of X-rays, thereby unavoidably producing ionizing radiation that can cause damage to the human body. So, it is not applicable to pregnant women and children; Repeated exposure to CT irradiation in a short period of time may cause leukocytosis, fatigue, dizziness, vomiting and other symptoms. In particular, pregnant women, neonates and patients with extreme weakness are more likely to develop malformation, cancers and other adverse effects after exposure to radiation. However, endoscopic examination will induce physical damage to a certain extent, leading to potential risks of inflammation, and its process will cause fear and discomfort to patients, among which children are more likely to show fear than adults. In addition, there are many practical operation problems for endoscopic examination. So, it is not an ideal method. The medical infrared thermal imaging instrument adopts the high-tech infrared detection technology, which has no radiation and does not touch the human body. When the human body is diseased, the heat balance of the diseased part will also be destroyed. The infrared thermal imaging captures this imbalance based on the infrared rays from the human body to form an infrared thermogram, which reflects the temperature characteristics of the human body and thus will not harm the human body. The instrument has now already passed the clinical verification. Infrared thermography can well reflect the presentation of sinusitis, especially performs well in distinguishing whether the inflammation is acute or chronic. And the expression on infrared thermography is better than CT. Combined with artificial intelligence imaging algorithms, it can achieve feature analysis at the level of a single pixel and provide doctors with more detailed and accurate reference data, so as to implement efficient auxiliary diagnosis. The instrument is suitable for various types of hospitals and medical institutions, and even for home medical diagnosis when it is combined with a remote auxiliary diagnosis system.
CT检查利用计算功能,根据x射线的基本特征对人体进行断层扫描,从而不可避免地产生对人体造成伤害的电离辐射。因此,不适用于孕妇和儿童;短时间内反复接受CT照射可引起白细胞增多、疲劳、头晕、呕吐等症状。特别是孕妇、新生儿和极度虚弱的病人,在受到辐射照射后更容易出现畸形、癌症和其他不良反应。然而,内镜检查会在一定程度上诱发身体损伤,导致炎症的潜在风险,其过程会给患者带来恐惧和不适,其中儿童比成人更容易表现出恐惧。此外,内窥镜检查还存在许多实际操作问题。所以,这不是一个理想的方法。医用红外热成像仪采用高科技红外探测技术,无辐射,不接触人体。当人体患病时,患病部位的热平衡也会被破坏。红外热成像是根据人体发出的红外线捕捉这种不平衡,形成红外热像图,反映人体的温度特征,不会对人体造成伤害。该仪器现已通过临床验证。红外热像能很好地反映鼻窦炎的表现,尤其能很好地区分炎症是急性还是慢性。红外热像图的表达优于CT。结合人工智能成像算法,可实现单像素级别的特征分析,为医生提供更详细、准确的参考数据,从而实现高效的辅助诊断。本仪器适用于各类医院和医疗机构,与远程辅助诊断系统结合使用,甚至可用于家庭医疗诊断。
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引用次数: 0
Anti-noise kinematic controller for redundant manipulators based on model driven neural network 基于模型驱动神经网络的冗余机械臂抗噪声运动控制器
Xin Chen, Xin Su
In this paper, a model-based anti-noise neural network controller for redundant robot motion control is proposed for motion control of redundant robots with uncertain kinematic parameters. The main challenge of this problem is the coexistence of parameter uncertainty, redundancy resolution, and system physical constraints. Therefore, a new model - driven neural network controller is proposed in this paper. A class of nodes are introduced to deal with the kinematic parameter uncertainty of the system. On this basis, the selection of the initial value of the hyperparameter of the neural network is deeply analyzed, and this processing has a positive effect on accelerating the convergence of the tracking error. The proposed controller has the advantages of simple structure, small computation and simple implementation. The simulation of Kinova Jaco2 manipulator verifies the effectiveness of the proposed algorithm.
针对运动参数不确定的冗余机器人运动控制问题,提出了一种基于模型的抗噪声神经网络冗余机器人运动控制控制器。该问题的主要挑战是参数不确定性、冗余解析和系统物理约束的共存。为此,本文提出了一种新的模型驱动神经网络控制器。引入了一类节点来处理系统运动参数的不确定性。在此基础上,对神经网络超参数初值的选取进行了深入分析,该处理对加速跟踪误差的收敛具有积极作用。该控制器具有结构简单、计算量小、实现简单等优点。通过对Kinova Jaco2机械手的仿真,验证了所提算法的有效性。
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引用次数: 0
Intelligent robot navigation system based on data mining algorithm 基于数据挖掘算法的智能机器人导航系统
Pingchuan Ma, Lichuan Xi
Artificial intelligence, electronics, and computers are developing faster and faster, embedded processors and machinery, intelligent robots have gained widespread attention in the market. The purpose of this paper is to design an intelligent robot navigation system based on data mining algorithm. Firstly, the navigation framework of intelligent robot based on ROS system is introduced. Then the key technologies of navigation are studied, and the path planning algorithm and self-positioning algorithm are introduced respectively. Finally, the robot navigation system is built according to the navigation framework, and the robot fixed-point navigation experiment is completed on the robot platform of this paper. In the navigation accuracy measurement experiment, A, B, C, and D are set as the coordinates of the target points, and each point is tested for navigation. The position error of the two points D in the x direction is about 0.05m, while the coordinate error in the y direction is larger, which is greater than the set 0.05m. The designed system can correctly construct the map of environmental information and can avoid obstacles and move to the set target position accurately and autonomously, which verifies the reliability and accuracy of the experimental platform and the navigation system.
人工智能、电子学、计算机发展越来越快,嵌入式处理器和机械、智能机器人在市场上得到了广泛关注。本文的目的是设计一个基于数据挖掘算法的智能机器人导航系统。首先,介绍了基于ROS系统的智能机器人导航框架。然后研究了导航的关键技术,分别介绍了路径规划算法和自定位算法。最后,根据导航框架构建了机器人导航系统,并在本文的机器人平台上完成了机器人定点导航实验。在导航精度测量实验中,设A、B、C、D为目标点坐标,对每个点进行导航测试。两点D在x方向上的位置误差约为0.05m,而y方向上的坐标误差较大,大于设定的0.05m。设计的系统能够正确构建环境信息地图,能够准确自主地避开障碍物并移动到设定的目标位置,验证了实验平台和导航系统的可靠性和准确性。
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引用次数: 0
Normalization method of encryption source in mimicry simulation system 拟态仿真系统中加密源的规范化方法
Bo Zhang, Zesheng Xi, Lei Wang, Chuan He, Kun Cao, Yu-Na Wang
Although the mimic system can effectively defend against known or unknown vulnerabilities / backdoor attacks, some encryption protocols such as SSH will produce different encryption results on different executors, even with the same processor, the same operating system, the same encryption protocol and the same plaintext, which leads to difficulty in output arbitration. To solve this problem, this paper proposes an encryption source normalization method, which can make different executors generate same ciphertext by normalizing the source of the random number and synchronizing the length of output data, so that the output of heterogeneous executers can be successfully arbitrated by the scheduler. This method is verified by experiments using SSH protocol. Test results show that this method can effectively solve the encryption problem of mimic system.
虽然模拟系统可以有效防御已知或未知的漏洞/后门攻击,但某些加密协议(如SSH)即使在相同的处理器、相同的操作系统、相同的加密协议和相同的明文下,也会在不同的执行器上产生不同的加密结果,从而导致输出仲裁困难。针对这一问题,本文提出了一种加密源规范化方法,通过对随机数的来源进行规范化,同步输出数据的长度,使不同的执行器生成相同的密文,从而使异构执行器的输出能够被调度程序成功仲裁。通过SSH协议的实验验证了该方法的有效性。测试结果表明,该方法能有效地解决模拟系统的加密问题。
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引用次数: 0
UAV 3D route planning algorithm based on improved RRT 基于改进RRT的无人机三维航路规划算法
Yu Liu, Zi-lv Gu, X. Bai, Bao-guo Wang, Di Wu, Guang-lin Yu
An improved algorithm based on fast extended random tree (RRT) was proposed to solve the 3d route planning problem of uav in complex environment. Firstly, the planning space modeling is carried out according to the threat factors of flight route. Secondly, in view of the large randomness of THE RRT algorithm, the heuristic distance function is introduced as the basis for the selection of nodes to be expanded, so as to increase the probability of nodes near the target being selected as nodes to be expanded, and improve the way of generating new nodes in the random tree to accelerate the convergence speed of the algorithm. Then, UAV dynamics constraints were incorporated into the new node to meet the flight path requirements. Finally, b-spline curve was used to optimize the smoothness of the initial route curvature discontinuity problem. Simulation results show that the improved algorithm has certain advantages in planning speed and route length, and can effectively solve the problem of UAV 3D route planning.
针对复杂环境下无人机的三维路径规划问题,提出了一种基于快速扩展随机树(RRT)的改进算法。首先,根据航路威胁因素进行规划空间建模;其次,针对the RRT算法随机性较大的特点,引入启发式距离函数作为选择待展开节点的依据,增加了目标附近节点被选择为待展开节点的概率,并改进了随机树中新节点的生成方式,加快了算法的收敛速度。然后,将无人机动力学约束纳入新节点,以满足飞行路径要求。最后,利用b样条曲线对初始路径曲率不连续问题的平滑度进行优化。仿真结果表明,改进算法在规划速度和航路长度方面具有一定优势,能够有效解决无人机三维航路规划问题。
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引用次数: 0
Modeling and optimization design for RF humidity perception in storage environment 存储环境射频湿度感知建模与优化设计
Lihong Wang, Chunhua Zhu
Radio Frequency (RF) perception of humidity is the current research hotspot of grain condition monitoring for "three temperature and three humidity". In order to analyze the optimal detection parameters on humidity of storage environment, the Wireless Insite test platform is built to analyze the effects of antenna height, carrier frequency and grain and with different moisture content on Channel State Information (CSI) such as received power, path loss and time delay. The mathematical relations between the humidity and path loss, the humidity and time delay are deduced respectively. In simulation experiments, the frequency bands of 2.4GHz, 5GHz, 28GHz, 45GHz, 60GHz are selected. Study the changes of path loss and delay spread with humidity in the storage environment at different frequencies and antenna height. When the height of the transceiver antenna is set to 1m, the 28GHz, 45GHz and 60GHz millimeter wave signals are more sensitive to humidity changes, thereby which can provide more higher perception resolution of detecting humidity in the storage environment, compared with the 2.4GHz and 5GHz frequency bands. Besides, when space humidity is constant and the moisture content of wheat is changed, the arrival time of each ray in the channel at 45GHz is longer than that at 60GHz. The above work can provide reference for the application of RF sensing technology in the humidity detection scenario.
射频湿度感知是当前“三温三湿”粮食状况监测的研究热点。为了分析存储环境湿度的最优检测参数,搭建Wireless Insite测试平台,分析天线高度、载波频率、粒度以及不同含水率对接收功率、路径损耗、时延等信道状态信息(CSI)的影响。分别推导了湿度与路径损耗、湿度与时延之间的数学关系。在仿真实验中,选取了2.4GHz、5GHz、28GHz、45GHz、60GHz频段。研究不同频率和天线高度下存储环境中路径损耗和时延扩展随湿度的变化。当收发天线高度设置为1米时,28GHz、45GHz和60GHz毫米波信号对湿度变化更为敏感,相对于2.4GHz和5GHz频段,可以提供更高的存储环境湿度检测感知分辨率。另外,当空间湿度一定,小麦含水率发生变化时,45GHz通道中每条射线的到达时间比60GHz通道长。以上工作可以为射频传感技术在湿度检测场景中的应用提供参考。
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引用次数: 0
Distributed machine learning framework and algorithm implementation in Ps-Lite Ps-Lite中分布式机器学习框架与算法实现
Jinrui Wang, Baorun Chen, Yinghan Du, Yan Feng, Quan Qian
Big data analysis based on artificial intelligence is particularly important in the era of Internet. The data is stored in different regions in industry. Meanwhile, sending data to servers generates huge amount of communication cost for centralized training. The distributed machine learning can resolve the storage of data and decrease the cost of data communication. But different distributed machine learning frameworks are also limited with the problems of low algorithm compatibility and poor expandability. The aim of this paper is building the distributed machine learning framework based on Ps-Lite and implementing algorithms in the framework. The framework is realized with asynchronous communication and computation methods. The algorithm implementation includes gradient-aggregating algorithm (distributed Stochastic Gradient Descent) and three regression algorithms (Logistic Regression, Lasso Regression and Ridge Regression). The algorithm implementation illustrates that common algorithms fit this framework with high compatibility and strong expandability. Finally, the experiment of Logistic Regression implementation proves the performance of the framework. The computation time of unit node is saved 50% with the increase of node number. The accuracy of the training model is maintained above 70% in the framework. The convergence efficiency of Logistic Regression is 3 times higher than that of the traditional one in the multiple-node framework.
基于人工智能的大数据分析在互联网时代显得尤为重要。数据存储在工业的不同区域。同时,向服务器发送数据会产生巨大的集中训练通信成本。分布式机器学习可以解决数据存储问题,降低数据通信成本。但不同的分布式机器学习框架也存在算法兼容性低、可扩展性差的问题。本文的目的是构建基于Ps-Lite的分布式机器学习框架,并在框架中实现算法。该框架采用异步通信和异步计算方法实现。算法实现包括梯度聚合算法(分布式随机梯度下降)和三种回归算法(Logistic回归、Lasso回归和Ridge回归)。算法实现表明,该框架适用于常用算法,具有高兼容性和强可扩展性。最后,通过逻辑回归实现实验验证了该框架的性能。随着节点数量的增加,单位节点的计算时间可节省50%。在框架中训练模型的准确率保持在70%以上。在多节点框架下,逻辑回归的收敛效率是传统回归的3倍。
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引用次数: 2
期刊
Third International Seminar on Artificial Intelligence, Networking, and Information Technology
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