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Software Control Flow Anomaly Detection Technology Based On Neural Network 基于神经网络的软件控制流异常检测技术
Xinda Xu, Jingling Zhao, Baojiang Cui
This paper presents a control flow anomaly detection model, which applies neural network to control flow anomaly detection and performs feature extraction and behavior modeling of control flow. At present, there is little research on the control flow anomaly detection of neural networks, and there is no in-depth research on the feature extraction of data. We studied the characteristics of control flow, used Intel Processor Trace to implement the extraction and processing of control flow, and designed a basic block vectorization method based on time series features and a basic block vectorization method based on structural features. The vectorization methods eliminate the manual amount of feature engineering. The anomaly detection model uses a bidirectional LSTM and it combines the idea of a classification plane. We perform corresponding evaluations based on the adobe reader software. Experimental results show that the model achieves a 98.74% recall rate and a 0.44% false positive rate for the corresponding control flow anomaly detection of Adobe Reader in an offline environment, effectively detects the exploit, and successfully distinguishes between benign and malicious control flow.
本文提出了一种控制流异常检测模型,该模型将神经网络应用于控制流异常检测,对控制流进行特征提取和行为建模。目前,对神经网络控制流异常检测的研究很少,对数据的特征提取也没有深入的研究。研究了控制流的特征,利用Intel Processor Trace实现控制流的提取和处理,设计了基于时间序列特征的基本块矢量化方法和基于结构特征的基本块矢量化方法。矢量化方法消除了大量的人工特征工程。异常检测模型采用双向LSTM,结合了分类平面的思想。我们根据adobereader软件进行相应的评估。实验结果表明,该模型在离线环境下对Adobe Reader相应的控制流异常检测达到了98.74%的召回率和0.44%的误报率,有效地检测出了漏洞,并成功区分了良性和恶意控制流。
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引用次数: 0
Analysis of the Workspace of UVW Platform UVW平台工作空间分析
Xinfeng Fan, M. Huang, T. Yang, Chen Fu, Yi Wan, Guanghui Shang
In order to achieve clean and precise assembly, the visual alignment system is often used in production to eliminate installation errors. However, the system actuator, UVW platform has the problem that the working space is difficult to solve, and the working boundary is difficult to accurately calculate, which affects the system alignment accuracy. To solve the above problems, this paper started from the structure, degree of freedom and plane model of the platform, solved the positive and negative solution equations of the platform position, and analyzed the singularity of the platform. By using the movement characteristics of platform 2 translation and 1 rotation, the XYθ three-dimensional workspace was constructed, and the shape and size change process of the platform working space were analyzed through the layered analysis method. It can be seen from the simulation results that the three-dimensional workspace can accurately obtain both the working boundary of the platform and the distribution of point clouds, which provides a basis for precise control of the platform.
为了实现清洁和精确的装配,在生产中经常使用视觉对准系统来消除安装误差。然而,系统执行机构UVW平台存在工作空间难以求解、工作边界难以精确计算的问题,影响了系统对准精度。为解决上述问题,本文从平台的结构、自由度和平面模型入手,求解了平台位置的正解方程和负解方程,并对平台的奇异性进行了分析。利用平台2平移1旋转的运动特性,构建了xyz θ三维工作空间,并通过分层分析方法分析了平台工作空间的形状和尺寸变化过程。从仿真结果可以看出,三维工作空间既能准确获取平台的工作边界,又能准确获取点云分布,为平台的精确控制提供了依据。
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引用次数: 0
Discharge Test of Unmanned Aerial Vehicles and Live High-voltage Wires 无人机与带电高压电线的放电试验
Chao Feng, Weike Liu, Xianhui Cao, Zhiwei Jia, Yujing Hu
In this paper, tests were carried out on the working state and the dischargestatus of the Unmanned Aerial Vehicles(UAV) motorwith different distances between the UAV and 110kV and 220kV live high-voltage wires. The results showed that the UAV could still keep regular operation when the distance between the 110kV wire and the UAV motor was 0.5m.It ran properly at a distance of 1m from the 220kV wire.The wire suddenly discharged electricity and punched through the UAV when it was boosted to 200kV at a distance of 0.5m from the UAV motor, but the UAV motor was not damaged.
本文对无人机与110kV和220kV高压带电线之间的不同距离下,无人机电机的工作状态和放电状态进行了试验。结果表明,当110kV导线与无人机电机之间的距离为0.5m时,无人机仍能保持正常运行。在距离220kV电线1m处正常运行。在距离无人机电机0.5m处,当升压到200kV时,电线突然放电并刺穿无人机,但无人机电机没有损坏。
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引用次数: 0
Development of Hydraulic Flow Control Valve for Intelligent Gas Well 智能气井液压流量控制阀的研制
Jinlong Wang, Jiewen Sun, Xianbo Xue, Yue Qu, R. Bai, Bing Zhang, Yingru Wang
Intelligent gas wells are an important means to control water cut, gas production and efficient development for gas reservoirs with bottom water. The development of hydraulic flow control valve is the key for the core completion tool of intelligent gas wells. Compared with the hydraulic flow control valve of intelligent completion for oil and water wells, the tightness requirements between the flow trim and the sliding sleeve of the hydraulic flow control valve in intelligent gas well are higher, and the sliding sleeve positioning requires more precise. The development of hydraulic flow control valve for intelligent gas wells in this paper adopts adjustable locking mechanism that can realize accurately locate the position of the sliding sleeve by setting different numbers of springs and adjusting the elastic force of the springs to adjust the hydraulic unlocking force. The dual sealing structure of metal seal and O-ring seal is adopted between the flow trim and the sliding sleeve to solve the gas tightness of the tool. The combination of laboratory experiment and fluid simulation analysis was used to first time confirm the shape of the valve hole suitable for hydraulic flow control valve for gas wells. Through the self-developed intelligent completion simulation system experiment, it can be seen that the pressure equalization and production control effect are good in the double-segment for water control and gas production process, and the gas production of a single well is increased by 17.8%, which can be combined with the downhole hydraulic reversing control system to form a low-cost intelligent gas well system to use in gas wells above 3000m. The development of hydraulic flow control valve has filled the gaps in the research of Chinese intelligent gas wells, and it has great significance in the theoretical research and practical application.
智能气井是底水气藏控制含水、产气、高效开发的重要手段。液压流量控制阀的研制是智能气井岩心完井工具的关键。与油水井智能完井液压流量控制阀相比,智能气井液压流量控制阀的流量阀与滑套之间的密封性要求更高,滑套定位要求更精确。本文开发的智能气井液压流量控制阀采用可调锁定机构,通过设置不同数量的弹簧,调节弹簧的弹性力来调节液压解锁力,实现对滑套位置的精确定位。流动阀芯与滑套之间采用金属密封和o型圈密封的双重密封结构,解决了工具的气密性问题。采用室内实验与流体仿真分析相结合的方法,首次确定了适合气井液压流量控制阀的阀孔形状。通过自主研发的智能完井仿真系统实验,可以看出,在控水产气过程的双段均压和产控效果良好,单井产气量提高17.8%,可与井下液压换向控制系统相结合,形成低成本的智能气井系统,应用于3000m以上气井。液压流量控制阀的研制填补了我国智能气井研究的空白,在理论研究和实际应用方面都具有重要意义。
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引用次数: 0
Research on Technical Support Ability of Communication Equipment Based on Comprehensive Evaluation Method 基于综合评价法的通信设备技术保障能力研究
Hua Qin, Haoyan Gong, Junlai Song, Deqin Wang
Aiming at the technical problems of communication equipment support, combined with the classification of communication elements and the extraction of eigenvalues, this paper uses the comprehensive evaluation method to evaluate the effectiveness of the comprehensive technical support capability of each element. Firstly, the analytic hierarchy process and entropy weight method are used to calculate the subjective and objective weights respectively, and then the characteristics are comprehensively weighted in combination with them. Finally, the grey correlation method is used to rank the element support effectiveness, the feasibility of the algorithm model is proved by simulation.
针对通信设备保障的技术问题,结合通信要素分类和特征值提取,采用综合评价方法对各要素综合技术保障能力的有效性进行评价。首先采用层次分析法和熵权法分别计算主客观权重,然后结合两者对特征进行综合加权。最后,采用灰色关联法对元素支持度进行排序,通过仿真验证了算法模型的可行性。
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引用次数: 0
A deep learning urban traffic congestion forecast model blending the temporal continuity and periodicity 一种融合时间连续性和周期性的深度学习城市交通拥堵预测模型
Bin Mu, Yuxi Huang
Traffic congestion has become an inevitable and difficult disease in the process of urban development, and it has also brought harm and hidden dangers to citizens' travel and urban development. The emergence of GCN solves the problem of capturing the spatial characteristics of urban road traffic. Based on this, we propose a new method that considers the periodicity of traffic patterns and builds a neural network model with multiple time scales to capture more detailed features. And the experiment proves that our model is better in predicting traffic congestion.
交通拥堵已成为城市发展过程中不可避免的顽疾,也给市民出行和城市发展带来了危害和隐患。GCN的出现解决了城市道路交通空间特征的捕捉问题。在此基础上,我们提出了一种考虑交通模式周期性的新方法,并建立了一个多时间尺度的神经网络模型来捕捉更详细的特征。实验证明,该模型能较好地预测交通拥堵。
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引用次数: 0
Research on fingertip positioning and human-computer interaction technology based on stereo vision 基于立体视觉的指尖定位与人机交互技术研究
Guoquan Cong
Human-computer interaction system based on computer vision is an important research direction in the field of human-computer interaction, which has broad application prospects in natural human-computer interaction, sign language recognition, virtual reality, smart home, somatosensory games and other fields. In this paper, an interactive visual perception method is proposed, which uses human experience to guide the computer to quickly build the visual perception model. By analyzing the difference between the predicted image and the actual image read by the camera, the area with large reflectivity change on the projection screen is found as the user area. This method can find the position of real human hand correctly even if the projection image contains human hand. Three-dimensional coordinates of fingertips are obtained by stereo matching principle, and Kalman filtering tracking algorithm is used to smooth the trajectory of fingertips and narrow the detection range of the next frame.
基于计算机视觉的人机交互系统是人机交互领域的一个重要研究方向,在自然人机交互、手语识别、虚拟现实、智能家居、体感游戏等领域有着广阔的应用前景。本文提出了一种交互式视觉感知方法,利用人的经验引导计算机快速构建视觉感知模型。通过分析预测图像与相机读取的实际图像之间的差异,找到投影屏幕上反射率变化较大的区域作为用户区域。该方法即使在投影图像中存在人手的情况下,也能准确地找到真实人手的位置。利用立体匹配原理获得指尖的三维坐标,利用卡尔曼滤波跟踪算法对指尖轨迹进行平滑处理,缩小下一帧的检测范围。
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引用次数: 0
Vehicle detection algorithm based on multi-scale features and normalization attention model 基于多尺度特征和规范化注意力模型的车辆检测算法
Yu-Shuai Duan, Huarong Xu, Lifen Weng
As the key technology of automatic driving perception module, vehicle detection in complex scenes requires real-time and accurate acquisition of the position and distance information of surrounding vehicles, so as to ensure the safety of passengers. Centernet algorithm performs well in vehicle detection, achieving a trade-off between accuracy and speed, but the network only extracts features of the target at the last layer of the feature map, leading to the problem of missed and false detections during detection. Therefore, this paper proposes a Vehicle-CenterNet detection model, which obtains more detailed information by modifying the original ResNet, constructing layered connections within a single residual block, and increasing the perceptual field size of each layer by stacking convolution operators. In addition, the Mish activation function is used instead of the ReLU activation function, and the smoothed activation function allows better information penetration into the neural network, resulting in better accuracy and generalization. The normalization-based attention module (NAM) is also incorporated to suppress non-target features and further improve the detection accuracy of the model. Experimental results on VOC dataset and KITTI dataset show that the mean average precision (mAP) and F1 Score of the proposed method are improved to different degrees, and the comprehensive performance is better than the original CenterNet algorithm.
复杂场景下的车辆检测作为自动驾驶感知模块的关键技术,需要实时准确地获取周围车辆的位置和距离信息,以保证乘客的安全。Centernet算法在车辆检测方面表现良好,实现了精度和速度之间的权衡,但该网络只提取了特征图最后一层的目标特征,导致检测过程中存在漏检和误检问题。因此,本文提出了一种Vehicle-CenterNet检测模型,该模型通过修改原始ResNet,在单个残差块内构建分层连接,并通过叠加卷积算子增加每层的感知场大小,从而获得更详细的信息。此外,使用Mish激活函数代替ReLU激活函数,平滑的激活函数可以更好地将信息渗透到神经网络中,从而获得更好的准确性和泛化性。同时加入了基于归一化的注意模块(NAM)来抑制非目标特征,进一步提高了模型的检测精度。在VOC数据集和KITTI数据集上的实验结果表明,本文方法的平均精度(mAP)和F1 Score均有不同程度的提高,综合性能优于原有的CenterNet算法。
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引用次数: 0
Road Vehicle Detection Based on Feature Fusion Between Frames 基于帧间特征融合的道路车辆检测
Xinbo Ai, Fu Gong, Yingjian Wang, Yanjun Guo
With the rapid economic development, motor vehicles are becoming more popular, and artificial intelligence applications on the road are emerging in endlessly. In current road vehicle detection algorithms, most of them use single-frame image information intercepted from video sequences for vehicle detection. This method does not take into account that the difference between frames in the video sequence is mainly the motion background information. Aiming at this design limitation, this paper proposes a target detection method based on IFFF (Inter-Frame Feature Fusion). In the input part of the model, in addition to adding the picture of the current frame, the feature map output of the previous frame will be added to enrich the information of the current frame and improve the detection performance of the current frame. At the same time, a spatial pyramid pooling structure is added to the network to further integrate local and global features to improve the ability to detect vehicles. Experiments show that the method proposed in this paper can improve the detection effect of vehicles in road scenes. Compared with the original CenterNet detection network, the mAP index is improved by 4.3%.
随着经济的快速发展,机动车越来越普及,人工智能在道路上的应用层出不穷。在目前的道路车辆检测算法中,大多采用从视频序列中截取的单帧图像信息进行车辆检测。该方法没有考虑到视频序列中帧与帧之间的差异主要是运动背景信息。针对这一设计局限性,本文提出了一种基于帧间特征融合(IFFF)的目标检测方法。在模型的输入部分,除了添加当前帧的图片外,还会添加前一帧输出的特征映射,以丰富当前帧的信息,提高当前帧的检测性能。同时,在网络中加入空间金字塔池结构,进一步整合局部特征和全局特征,提高对车辆的检测能力。实验表明,本文提出的方法可以提高道路场景中车辆的检测效果。与原有的CenterNet检测网络相比,mAP指数提高了4.3%。
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引用次数: 0
SER-UNet: A Network for Gastrointestinal Image Segmentation SER-UNet:胃肠图像分割网络
Hongwei Niu, Yutong Lin
Cancers of the digestive tract include esophageal tumors, gastric tumors, and intestinal tumors. Radiation oncologists try to deliver high doses of radiation using X-rays directed at the tumor while avoiding the stomach and intestine, but the complex manual labeling of the gut is time-consuming and inaccurate. Using deep learning can help automate the segmentation process, and this method of segmenting the stomach and intestine will lead to faster treatment. It will allow more patients to be treated more effectively. Thus, we propose a network model for GI segmentation that uses a residual network with a fused channel attention mechanism as an encoder for the U-Net model, combined with a U-Net decoder and a feature fusion architecture to achieve pixel-level classification and segmentation of images. In our experiments, we choose IOU as the model evaluation index, and the higher the IOU, the better the performance of the model. The experimental results show that the IOU of our model is improved by 1.8% to 2.5% compared with other models, which outperforms other models in the GI segmentation task.
消化道肿瘤包括食道肿瘤、胃肿瘤和肠肿瘤。放射肿瘤学家试图使用x射线对肿瘤进行高剂量的辐射,同时避开胃和肠道,但对肠道进行复杂的手动标记既耗时又不准确。使用深度学习可以帮助自动分割过程,这种分割胃和肠的方法将导致更快的治疗。这将使更多的病人得到更有效的治疗。因此,我们提出了一种用于GI分割的网络模型,该模型使用带有融合通道注意机制的残差网络作为U-Net模型的编码器,结合U-Net解码器和特征融合架构来实现图像的像素级分类和分割。在我们的实验中,我们选择IOU作为模型的评价指标,IOU越高,模型的性能越好。实验结果表明,与其他模型相比,我们模型的IOU提高了1.8% ~ 2.5%,在GI分割任务中优于其他模型。
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引用次数: 3
期刊
Proceedings of the 2022 2nd International Conference on Control and Intelligent Robotics
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