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An image analysis tool for cell migration assay with a large sample size 用于大样本量细胞迁移试验的图像分析工具
Di Yin, Hongbo Zhang, Shih-Mo Yang, R. Yin, Wenjun Zhang
Cell migration assay is the most common research approach for cell migration. Quantitative research and analysis are carried out by measuring the migration of cells into the region that is artificially created among confluent monolayer cells. To improve the efficiency and accuracy of the analysis, the software/tools were developed to assist the image analysis process. However, these software and tools are still at the stage of measuring a single sample, which cannot satisfy the requirement of large sample size for cell migration assay device. In this paper, an image analysis tool based on Fiji is developed, which can segment multiple samples from a scanned image and then analyze a single sample in batch. In addition, the screening function should be added for the application scenario of large sample size. The samples can be filtered according to different conditions to improve the consistency of experimental conditions. The results show that the developed analysis tool ATCA has high accuracy in identifying cell-free zones, with a difference of 2.3% from the tool WHST and 2.9% from manual operation. The analysis efficiency of this tool is 15 times that of manual operation.
细胞迁移试验是研究细胞迁移最常用的方法。定量研究和分析是通过测量细胞迁移到在融合单层细胞之间人工创建的区域来进行的。为了提高分析的效率和准确性,开发了软件/工具来辅助图像分析过程。然而,这些软件和工具还停留在单个样品的测量阶段,无法满足细胞迁移测定装置大样本量的要求。本文开发了一种基于斐济的图像分析工具,可以从扫描图像中分割出多个样本,然后批量分析单个样本。此外,对于大样本量的应用场景,应增加筛选功能。可根据不同条件对样品进行过滤,提高实验条件的一致性。结果表明,开发的分析工具ATCA在识别细胞无区方面具有较高的准确性,与工具WHST相差2.3%,与人工操作相差2.9%。该工具的分析效率是人工操作的15倍。
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引用次数: 0
Automatic picking method of microseismic first arrival based on support vector machine based on particle swarm optimization 基于粒子群优化的支持向量机微震首点自动拾取方法
Tieniu Li, Binxin Hu, Zengrong Sun, Feng Zhu, Hua Zhang, Quancheng Yang
Automatic and accurate arrival time pickup of microseismic first-arrival waves is an important prerequisite for high precision microseismic source location. Aiming at the low efficiency of the traditional manual pickup method and the low accuracy of the long, short window energy ratio (STA/LTA) method commonly used in automatic pickup for low signal-to-noise ratio signals, an automatic picking method of microseismic first arrival based on support vector machine based on particle swarm optimization is proposed. Firstly, according to the amplitude and energy of microseismic signal and the energy ratio of adjacent time, the signals are marked with different categories. Then the parameters are optimized by particle swarm optimization algorithm to construct the support vector machine model of microseismic first-arrival. Finally, the data is substituted to extract the microseismic first-arrival. The experiment is carried out with the microseismic monitoring data of underground roadway in a gold mine. The experimental results show that, under the condition of low SIGNal-to-noise ratio, the picking accuracy of the proposed method is 96.4%, the average pickup error is 3.9ms, and the picking accuracy and accuracy are better than STA/LTA method.
微震初到波的自动准确到达时间采集是实现高精度微震源定位的重要前提。针对传统人工采集方法效率低、低信噪比信号自动采集常用的长、短窗口能量比(STA/LTA)方法精度低的问题,提出了一种基于粒子群优化的支持向量机微震初到自动采集方法。首先,根据微震信号的振幅和能量以及相邻时间的能量比,对微震信号进行分类;然后利用粒子群优化算法对参数进行优化,构建微地震初到支持向量机模型。最后,代入数据提取微震初至。利用某金矿地下巷道微震监测资料进行了试验研究。实验结果表明,在低信噪比条件下,该方法的拾取精度为96.4%,平均拾取误差为3.9ms,拾取精度和精度均优于STA/LTA方法。
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引用次数: 0
Continuous sign language recognition based on 3DCNN and BLSTM 基于3DCNN和BLSTM的连续手语识别
Hengbo Zhang, Daming Liu, Nana Fu
Sign language recognition can make the communication between deaf mutes and healthy people more convenient and fast. In recent years, with the continuous development of deep learning, the research method of deep learning has also been introduced into the field of sign language recognition. Compared with the recognition of isolated words, the recognition of continuous sign language is more time-dependent. The current research still has shortcomings in recognition accuracy. Therefore, we proposed a continuous sign language recognition method based on 3DCNN and BLSTM. Based on the spatial feature information extracted by 3DCNN and the short-term temporal relationship established, the global temporal modeling of the video information of continuous sign language is carried out by using the bidirectional semantic mining ability of BLSTM. The CTC loss function is constructed to solve the problem of time series label misalignment. At the same time, we add the calculation of auxiliary loss function and auxiliary classifier. Experiments show that the auxiliary loss function and classifier can effectively reduce the error rate of the network. The word error rate of the continuous sign language recognition algorithm proposed in this paper on the large continuous sign language dataset RWTH-PHONEIX-Weather 2014 is as low as 23.5%, which is lower than the previous algorithm.
手语识别可以使聋哑人与健康人之间的交流更加方便快捷。近年来,随着深度学习的不断发展,深度学习的研究方法也被引入到手语识别领域。与孤立词的识别相比,连续手语的识别更具有时间依赖性。目前的研究在识别精度上还存在不足。因此,我们提出了一种基于3DCNN和BLSTM的连续手语识别方法。基于3DCNN提取的空间特征信息和建立的短期时间关系,利用BLSTM的双向语义挖掘能力,对连续手语视频信息进行全局时间建模。为了解决时间序列标签错位问题,构造了CTC损失函数。同时增加了辅助损失函数和辅助分类器的计算。实验表明,辅助损失函数和分类器可以有效地降低网络的错误率。本文提出的连续手语识别算法在RWTH-PHONEIX-Weather 2014大型连续手语数据集上的单词错误率低至23.5%,低于之前的算法。
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引用次数: 0
TransCGan-based human motion generator 基于transgan的人体运动发生器
Wenya Yu
The synthesis of human movement is used in a wide range of applications, such as in military, gaming, sports, medical, robotics and many other fields. The current common approach is based on the acquisition of human motion data by motion capture devices. However, employing this method to gather information on human movements is expensive, time-consuming, and subject to space constraints. In order to avoid these problems, our goal is to create a system that can generate a variety of naturalistic movements quickly and inexpensively. We assume that the creation of human motion is a complicated, non-linear process that is amenable to modeling with deep neural networks. First, using optical motion capture equipment, we collect a range of human motion data, which we then pre-process and annotate. After that-we combine Transformer with Conditional GAN (Cgan) to train this human motion generation model with the collected data. Finally, we evaluate this model by qualitative and qualitative means, which can generate multiple human motions from a high-dimensional potential space based on specified labels.
人体运动的合成有着广泛的应用,如军事、游戏、体育、医疗、机器人和许多其他领域。目前常用的方法是通过动作捕捉设备获取人体运动数据。然而,使用这种方法来收集人类运动的信息是昂贵的,耗时的,并且受到空间的限制。为了避免这些问题,我们的目标是创建一个系统,可以快速和低成本地生成各种自然运动。我们假设人体运动的产生是一个复杂的非线性过程,可以用深度神经网络建模。首先,我们使用光学运动捕捉设备,收集一系列人体运动数据,然后对其进行预处理和注释。之后,我们将Transformer与条件GAN (Cgan)结合起来,用收集到的数据训练这个人体运动生成模型。最后,我们通过定性和定性两种方法对该模型进行评价,该模型可以基于指定标签从高维势空间生成多个人体运动。
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引用次数: 0
A method for wireless communication interference signal identification based on extreme learning machine 一种基于极限学习机的无线通信干扰信号识别方法
Xiaozheng Liu, Yue Wang, Xiaofei Wang, Jian Geng
Intelligent anti-jam communication is a new generation of anti-interference technology combined with artificial intelligence, and the identification of interference signals is the basis of the technology. It is required to achieve better identification results with lower computational complexity in engineering applications. However, previous research has shown that they cannot balance these two sides. Here, we report an interference signal identification algorithm based on Extreme Learning Machine (ELM). Five typical oppressive interference signals were recognized based on ELM which is based on feature extraction. The overall correct identification rate is more than 96% under the condition of 40 neurons in a single hidden layer, and it has certain generalization ability. This study objectively promotes the engineering application of this technology.
智能抗干扰通信是与人工智能相结合的新一代抗干扰技术,干扰信号的识别是该技术的基础。在工程应用中,需要以较低的计算复杂度获得较好的识别结果。然而,先前的研究表明,他们无法平衡这两方面。本文报道了一种基于极限学习机(ELM)的干扰信号识别算法。基于特征提取的ELM识别了5种典型的压迫性干扰信号。在单个隐藏层有40个神经元的情况下,总体识别率达到96%以上,具有一定的泛化能力。本研究在客观上促进了该技术的工程应用。
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引用次数: 0
Ranking influential nodes by combining normalized degree centrality and fine-grained K-Shell 结合归一化度中心性和细粒度K-Shell对影响节点进行排序
Xiuyong Mao, Fan Yang, Kaiyu Fan, Weizhou Hu, Chungui Li
Identifying influential nodes is one of the crucial issues for controlling the network propagation process and exploring network properties in complex networks. Nevertheless, the accuracy of existing methods is still a challenge. In this paper, we rank influential nodes by considering tow aspects. On one hand, a normalized degree centrality is proposed to measure the local influence of each node. On the other hand, an improved fine-grained K-Shell decomposition is defined to measure the spreading ability of neighbors of a node. Further, a novel ranking measure is proposed by combining the normalized degree centrality and fine-grained K-Shell (NDF-FKS). The Susceptible-Infected-Recovery (SIR) model is used to simulate the network propagation process. Experiments with the model are performed on eight synthetic networks and four real networks. The NDF-FKS compared with six measures for accuracy and resolution. The results show that the accuracy of NDF-FKS outperforms existing six measures and has a competitive performance on distinguishing influential nodes.
在复杂网络中,识别影响节点是控制网络传播过程和探索网络特性的关键问题之一。然而,现有方法的准确性仍然是一个挑战。本文从两个方面对影响节点进行排序。一方面,提出了一种归一化度中心性来衡量每个节点的局部影响;另一方面,定义了改进的细粒度K-Shell分解来度量节点邻居的扩散能力。进一步,将归一化度中心性与细粒度K-Shell (NDF-FKS)相结合,提出了一种新的排序度量方法。采用敏感-感染-恢复(SIR)模型模拟网络传播过程。在8个合成网络和4个真实网络上进行了实验。NDF-FKS比较了六种测量方法的精度和分辨率。结果表明,NDF-FKS的准确率优于现有的6种方法,在识别影响节点方面具有一定的竞争力。
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引用次数: 0
Weld defect recognition method based on improved DenseNet 基于改进DenseNet的焊缝缺陷识别方法
Li Huadu, Luo Renze, Tang Xiang, Wu Yong, Li Yalong
There are many subjective influencing factors, poor recognition effect and low efficiency in manual evaluation of pipeline weld defects. An intelligent identification method of pipeline weld defects based on improved DenseNet network is proposed. This method firstly uses the form of multi-channel convolution of different scales to improve the DenseNet network, thereby improving the generalization ability of the network. Then, the feature extraction ability of the network is improved by stacking two convolutions of the same scale. Finally, an attention mechanism module is introduced into the dense connection block of the network to achieve the effect of improving beneficial features and suppressing useless features. The experimental results show that the method can achieve 92% accuracy in the identification of pipeline weld defects, which is about 13% higher than the original method, and has high efficiency, which can fully achieve the purpose of industrial application.
人工评价管道焊缝缺陷主观影响因素多,识别效果差,效率低。提出了一种基于改进DenseNet网络的管道焊缝缺陷智能识别方法。该方法首先采用不同尺度的多通道卷积形式对DenseNet网络进行改进,从而提高了网络的泛化能力。然后,通过叠加两个相同尺度的卷积来提高网络的特征提取能力。最后,在网络的密集连接块中引入注意机制模块,达到提高有益特征和抑制无用特征的效果。实验结果表明,该方法对管道焊缝缺陷的识别准确率可达到92%,比原方法提高13%左右,且效率高,完全可以达到工业应用的目的。
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引用次数: 0
Detection of violent crowd behavior based on mean kinetic streak flow 基于平均运动条纹流的暴力人群行为检测
Yin-Chang Zhou
With the frequent occurrence of global security problems, violent crowd behavior endangers public security seriously. Meanwhile, intelligent surveillance video technology can be applied for violent crowd behavior detection as more and more surveillance cameras are installed in public and sensitive areas. In this paper, we propose a novel mean kinetic violent flow (MKViF) algorithm for violent crowd behavior detection by extracting the kinetic energy feature of video flow. Specifically, A is firstly calculating the mean kinetic energy by streak flow of each corner in each frame. Then, we obtain a binary indicator of kinetic energy change by calculating the amplitude change between sequence frames. Finally, the MKViF vector for a sequence of frames is obtained by averaging these binary indicators of each pixel in all frames. Experimental results show that the proposed MKViF algorithm behaves better in classification performance and real-time processing performance (45 frames per second) than the existing algorithms.
随着全球性安全问题的频发,人群暴力行为严重危害公共安全。同时,随着越来越多的监控摄像头安装在公共和敏感区域,智能监控视频技术可以应用于暴力人群行为的检测。本文通过提取视频流的动能特征,提出了一种新的平均动能暴力流(MKViF)算法,用于暴力人群行为检测。具体来说,A首先通过每帧中每个角的条纹流计算平均动能。然后,通过计算序列帧之间的幅度变化,得到了动能变化的二元指标。最后,通过对所有帧中每个像素的这些二进制指标进行平均,得到一帧序列的MKViF向量。实验结果表明,所提出的MKViF算法在分类性能和实时处理性能(45帧/秒)方面都优于现有算法。
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引用次数: 0
Multi-scale context-aware segmentation network for medical images 医学图像的多尺度上下文感知分割网络
Qing Li, Yuqing Zhu
Aiming at the problems that the method based on U-shaped network for medical image segmentation cannot capture the long-range dependencies and could lose some detail information, a multi-scale context-aware segmentation network for medical images is proposed. The model extracts the last three layer features of the encoder, and then introduces a global circular convolution transformer module to solve the problem of long-range dependencies capturing by modeling the global context information. Then, an attention guidance module is introduced to fuse features of different scales, so as to solve the problem of losing details while reducing the introduction of noise information in the low level features. The experimental performance on Synapse multi-organ segmentation datasets indicates that the model produces more precise segmentation results.
针对基于u型网络的医学图像分割方法无法捕捉到图像间的长期依赖关系和丢失部分细节信息的问题,提出了一种多尺度的医学图像上下文感知分割网络。该模型提取编码器的后三层特征,然后引入全局圆形卷积变压器模块,通过对全局上下文信息建模来解决远程依赖关系捕获问题。然后,引入注意力引导模块,融合不同尺度的特征,在减少低尺度特征中噪声信息引入的同时,解决了细节丢失的问题。在Synapse多器官分割数据集上的实验结果表明,该模型的分割结果更加精确。
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引用次数: 0
Embedding diverse features in latent space for face attribute editing 在潜在空间中嵌入多种特征进行人脸属性编辑
Rui Yuan, Xiping He, Dan He, Yue Li
Face attribute editing, one of the important research directions in face image synthesis and processing techniques, aims to photorealistic editing single or multiple attributes of face images on demand using editing and generation models. Most existing methods are based on generative adversarial networks, using target attribute vectors to control the editing region or Gaussian noise as conditional input to capture texture details. However, these cannot better control the consistency of attributes in irrelevant regions, while the generation of fidelity is also limited. In this paper, we propose a method that uses an optimized latent space to fuse the attribute feature maps into the latent space. At the same time, make full use of the conditional information for additional constraints. Then, in the image generation phase, we use a progressive architecture for controlled editing of face attributes at different granularities. At last, we also conducted an ablation study on the selected training scheme further to demonstrate the stability and accuracy of our chosen method. The experiments show that our proposed approach, using an end-to-end progressive image translation network architecture, obtained qualitative (FID) as well as quantitative (LPIPS) face image editing results.
人脸属性编辑是人脸图像合成与处理技术的重要研究方向之一,其目的是利用编辑和生成模型,按需对人脸图像的单个或多个属性进行逼真的编辑。现有方法大多基于生成对抗网络,利用目标属性向量控制编辑区域或高斯噪声作为条件输入捕获纹理细节。然而,这些方法不能很好地控制不相关区域属性的一致性,同时保真度的生成也受到限制。本文提出了一种利用优化后的潜在空间将属性特征映射融合到潜在空间的方法。同时,充分利用条件信息进行附加约束。然后,在图像生成阶段,我们使用渐进式架构对不同粒度的人脸属性进行控制编辑。最后,我们还对所选择的训练方案进行了烧蚀研究,进一步验证了所选择方法的稳定性和准确性。实验表明,我们提出的方法使用端到端渐进式图像翻译网络架构,获得了定性(FID)和定量(LPIPS)的人脸图像编辑结果。
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引用次数: 0
期刊
Fifth International Conference on Computer Information Science and Artificial Intelligence
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