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2019 International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2)最新文献

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Classification of Gas Bubble in A Doppler Ultrasound Signal Using Synchrosqueezing Transform 利用同步压缩变换对多普勒超声信号中的气泡进行分类
Mst. Rehena Khatun, Md. Ekramul Hamid, Md. Iqbal Aziz Khan
This paper presents classification of gas bubble in a Doppler ultrasound signal using Synchrosqueezing Transform (SST). The SST decomposes the signal into a number of scales. In this research work, initially two statistical parameters, the peak value and variance are estimated to Figure out the scales that contains gas bubbles. Then the signal is reconstructed from the coefficient values within the selected scale. Some parameters are defined and calculated from the reconstructed signal. These parameters are used to classify gas bubble signal using naïve Bayes classifier. However, two classes “bubble” and “not bubble” are identified by training data sets. Therefore, on the basis of posterior probability, the class of the signal is defined. Finally, performance of gas bubble detection is evaluated in terms of sensitivity and positive predictivity tests. Our proposed method is applied on grade 0, I, II, and III signals. It is observed that, good classification result is achieved in grade I and grade II. In grade 0, no gas bubble is found. In the experiment, 92% gas bubble is classified in grade I, 84% gas bubble is classified in grade II and 80% gas bubble is classified in grade III. Experimental result shows that the proposed method achieves better accuracy than the conventional method in the literature.
利用同步压缩变换(SST)对多普勒超声信号中的气泡进行分类。海温将信号分解成若干尺度。在本研究工作中,首先通过估计峰值和方差两个统计参数来确定含有气泡的尺度。然后从所选尺度内的系数值重构信号。根据重构信号定义并计算了一些参数。利用这些参数,利用naïve贝叶斯分类器对气泡信号进行分类。然而,通过训练数据集可以识别出“冒泡”和“非冒泡”两个类。因此,在后验概率的基础上,定义了信号的类别。最后,从灵敏度和正预测性两方面对气泡检测的性能进行了评价。我们提出的方法适用于0、I、II和III级信号。观察到,一级和二级分级均取得了较好的分类效果。0级无气泡。实验中,92%的气泡为一级气泡,84%的气泡为二级气泡,80%的气泡为三级气泡。实验结果表明,该方法比传统的文献方法具有更高的精度。
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引用次数: 1
Social Media User’s Safety Level Detection through Classification via Clustering Approach 基于聚类方法的社交媒体用户安全等级检测
Md. Kalim Amzad Chy, Sheikh Arif Ahmed, Ali Haider Doha, Abdul Kadar Muhammad Masum, S. I. Khan
Social media has a significant impact on our daily life, and the popularity is increasing rapidly because of the ability to be attached to people around the world and share feelings, photos, videos, etc. So, it bears a high-security concern. However, most of the social media user does not know the security level of their account, including what features of social media should consider if the account is in a risk situation. The posting, friendship, etc. sometimes brings unfortunate events like identity theft, sexual harassment, cyber-crime, etc. To overcome such kind of unexpected issues, this research proposes a classification via clustering algorithm based predictive model by which one can know his safety level in the social media. A dataset is formed through a closed-ended questionnaire. Essential features are selected via gain ration method as high dimensional data is costly to train a model. An unsupervised algorithm, hierarchical clustering, cluster the users into three groups that are labeled for further analysis. The various classification algorithm is chosen to train the predictive model. From the model evaluation result, “Logistic Regression” predicts the safety level of a social media user with high accuracy. So, this model will bring an extra dimension in social media user account safety.
社交媒体对我们的日常生活产生了重大影响,并且由于能够与世界各地的人建立联系并分享感受,照片,视频等,因此受欢迎程度正在迅速增加。因此,这是一个高度安全问题。然而,大多数社交媒体用户并不知道他们的账户的安全级别,包括如果账户处于风险情况下,社交媒体的哪些功能应该考虑。发帖、交友等有时会带来不幸的事件,如身份盗窃、性骚扰、网络犯罪等。为了克服这种意想不到的问题,本研究提出了一种基于聚类算法的分类预测模型,通过该模型可以知道自己在社交媒体中的安全水平。数据集是通过封闭式问卷形成的。由于高维数据训练成本高,采用增益比法选择基本特征。一种无监督的算法,分层聚类,将用户聚为三组,这些组被标记为进一步分析。选择各种分类算法来训练预测模型。从模型评价结果来看,“Logistic回归”预测社交媒体用户的安全等级具有较高的准确性。因此,这种模式将为社交媒体用户的账户安全带来额外的维度。
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引用次数: 4
ACENTRIST: An Augmented Census Transform Histogram for Aerial Image Classification 一种用于航空图像分类的增强人口普查变换直方图
Badal Chandra Mitra, A. Akter, Rahat Hossain Faisal, Md. Mostafijur Rahman
Aerial image classification has become one of the most important topics to the computer vision researchers because of its numerous real world application. A great number of census transform based descriptors have been introduced in recent years to classify the aerial images. But the major drawback of these census transform based techniques is, most of these techniques works only with the center pixel information of an image with respect to their neighboring pixels. Hence, no information about the relationship among the neighboring pixels is obtained. To mitigate this problem, we introduce an Augmented Census Transform Histogram (ACENTRIST) for aerial image classification which encodes both the center pixel information and neighboring pixel information. The proposed technique augments two local binary pattern based descriptor which encodes the center pixel information with respect to the neighboring pixels and information of the angular difference of the neighboring pixels. We have conducted thorough experiments in two of the well-known aerial image dataset, UC Merced Land Use (Land Use 21) and In-House (Banja Luka), and the experimental result shows that the proposed methodology gains considerable higher accuracy over the state of the art methods.
航空图像分类由于其在现实世界中的广泛应用,已成为计算机视觉研究的重要课题之一。近年来,人们引入了大量基于人口普查变换的描述符来对航空图像进行分类。但这些基于人口普查变换的技术的主要缺点是,大多数这些技术只能处理图像的中心像素信息相对于它们的相邻像素。因此,没有关于相邻像素之间关系的信息。为了缓解这一问题,我们引入了一种增强人口普查变换直方图(ACENTRIST)用于航空图像分类,该方法对中心像素信息和相邻像素信息进行编码。该技术增强了两个基于局部二进制模式的描述符,该描述符对中心像素信息和相邻像素的角差信息进行编码。我们在两个著名的航空图像数据集,UC Merced Land Use (Land Use 21)和house (Banja Luka)中进行了彻底的实验,实验结果表明,所提出的方法比最先进的方法获得了更高的精度。
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引用次数: 0
Study of nonradiative recombination centers in GaAs:N δ-doped superlattices structures revealed by below-gap excitation light 隙下激发光显示GaAs:N δ掺杂超晶格结构中非辐射复合中心的研究
Md. Dulal Haque, N. Kamata, A. T. Touhidul Islam, M. Julkarnain, S. Yagi, H. Yaguchi, Y. Okada
Nonradiative recombination (NRR) centers in GaAs:N $delta$-doped superlattices (SLs) grown by molecular beam epitaxy (MBE) has been investigated by two-wavelength excited photoluminescence (TWEPL) method for conduction band scheme. The PL intensity of $E_{-}$ band of the samples with lower nitrogen (N) concentration (0.317% N) initially increases after addition of below-gap excitation (BGE) light over above-gap excitation (AGE) light and then quenches at higher BGE density and energy, while that of GaAs (e-A°) emission of GaAs layers decreases monotonically. For sample with higher N concentration (1.18% N) both the $E _{-}$ band and GaAs (e-A°) emission decreases monotonically with enhancing BGE density and degree of decreasing of PL intensity is higher compared to the low N concentration sample. The quenching of PL intensity indicates the existence of NRR centers in GaAs layers and GaAs:N $delta$-doped SL region. The recombination models have been proposed for explaining the results from the experiments.
用双波长激发光致发光(TWEPL)方法研究了分子束外延(MBE)生长的GaAs:N $delta$掺杂超晶格(SLs)中的非辐射复合(NRR)中心。低氮(N)浓度(0.317% N)样品的$E_{-}$带的PL强度在加隙下激发(BGE)光后先增加,然后在更高的BGE密度和能量下猝灭,而GaAs层的GaAs (e-A°)发射的PL强度单调降低。对于高N浓度(1.18% N)样品,随着BGE密度的增加,$E _{-}$波段和GaAs (E - a°)发射均单调下降,且PL强度的下降程度高于低N浓度样品。PL强度的猝灭表明在GaAs层和GaAs:N $delta$掺杂的SL区存在NRR中心。本文提出了重组模型来解释实验结果。
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引用次数: 0
An Integer-Constrained Genetic Algorithm for Sensor Placement in Structural Health Monitoring 结构健康监测中传感器位置的整数约束遗传算法
Munni Rani Banik, Tonmoy Das
Application of Genetic Algorithms (GAs) for allotting sensors in Structural Health Monitoring (SHM) has received wide attention during the last three decades because of their potential as global search technique. However, from computational perspective, sensor allocation is a complex combinatorial optimization problem and can lead to some constraints that reduces the efficiency of simple GAs. To eradicate such dilemma, an Integer Constrained Genetic Algorithm (ICGA) is introduced for finding the optimal placement of sensors. Integer coded string and modal assurance criteria oriented objective function are adopted respectively to represent and measure the utility of a sensor configuration. A benchmark bridge structure is studied to demonstrate the feasibility and effectiveness of ICGA. Later, the simulation results obtained by the ICGA are compared to the conventional GA. The result shows that ICGA can satisfactorily identify the number of sensors along with their locations and enhances the convergence of the algorithm. More apparently, proposed algorithm can reduce the dissipative storage space generated by conventional methods, removes any redundancy of sensor and improves the balance between exploitation and exploration of the search space.
遗传算法在结构健康监测(SHM)中分配传感器的应用,由于其具有全局搜索技术的潜力,在过去的三十年中受到了广泛的关注。然而,从计算的角度来看,传感器分配是一个复杂的组合优化问题,并且会导致一些约束,从而降低简单GAs的效率。为了解决这一难题,引入整数约束遗传算法(ICGA)来寻找传感器的最优位置。采用整数编码字符串和面向目标函数的模态保证准则分别表示和度量传感器配置的效用。通过对一个基准桥梁结构的研究,验证了该方法的可行性和有效性。最后,将ICGA的仿真结果与常规遗传算法进行了比较。结果表明,ICGA能较好地识别出传感器的数量和位置,提高了算法的收敛性。更明显的是,该算法减少了传统方法产生的耗散存储空间,消除了传感器的冗余,改善了搜索空间的利用和探索之间的平衡。
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引用次数: 3
A Precise Breast Cancer Detection Approach Using Ensemble of Random Forest with AdaBoost 基于AdaBoost的随机森林集合的乳腺癌精确检测方法
Tanbin Islam Rohan, Awan-Ur-Rahman, Abu Bakar Siddik, Monira Islam, Md. Salah Uddin Yusuf
Due to breast cancer, a number of women die every year. With an early diagnosis, breast cancer can be cured. Prognosis and early detection of cancer types have become a necessity in cancer research. Thus, a reliable and accurate system is required for the classification of benign and malignant tumor types of breast cancer. This paper explores a supervised machine learning model for classification of malignant and benign tumor types from Wisconsin Breast Cancer dataset retrieved from UCI machine learning repository. The dataset has 458 (65.50%) of benign data and 241 (34.50%) of malignant data, the total of 699 instances, 11 features and 10 attributes. Random Forest (RF) ensemble learning method is implemented with AdaBoost algorithm manifest improved metrics of performance in binary classification between tumor classes. For more accurate estimation of model prediction performance, 10-fold cross-validation is applied. The structure provided accuracy of 98.5714% along with sensitivity and specificity of 100% and 96.296% respectively in the testing phase. Matthews Correlation Coefficient is calculated 0.97 which validates of the structure being a pure binary classifier for this work. The proposed structure outperformed conventional RF classifier for classifying tumor types. Additionally, this model enhances the performance of conventional classifiers.
每年都有许多妇女死于乳腺癌。通过早期诊断,乳腺癌是可以治愈的。癌症类型的预后和早期发现已成为癌症研究的必要条件。因此,需要一个可靠、准确的系统来划分乳腺癌的良恶性肿瘤类型。本文探讨了一种有监督的机器学习模型,用于从UCI机器学习存储库中检索威斯康星乳腺癌数据集的恶性和良性肿瘤类型分类。该数据集有458个(65.50%)良性数据和241个(34.50%)恶性数据,共699个实例,11个特征和10个属性。随机森林(RF)集成学习方法采用AdaBoost算法实现,在肿瘤类别间的二分类性能指标上有明显提高。为了更准确地估计模型的预测性能,采用了10倍交叉验证。该结构在检测阶段的准确率为98.5714%,灵敏度为100%,特异度为96.296%。马修斯相关系数计算为0.97,这验证了该结构是一个纯二元分类器。所提出的结构优于传统的射频分类器对肿瘤类型的分类。此外,该模型还提高了传统分类器的性能。
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引用次数: 4
Study on the Performance of ZnO/CuO Heterojunction Solar Cell Simulation and Experimental ZnO/CuO异质结太阳能电池性能的仿真与实验研究
A. Kuddus, Md. Ferdous Rahman, S. Tabassum, J. Hossain, A. Ismail
Study on the performance of zinc oxide (ZnO) and copper oxide (CuO) based heterojunction solar cell for simulation and home fabrication has been presented in this report. SCAPS-1D simulator has been used for simulation and these simulation results are used to fabricate ZnO/CuO heterojunction solar cell (HJSC) experimentally using very low cost and simple spin coating technique. Simulation has been done at wide range of thickness of window n-ZnO layer, absorber p-CuO layer and concentration of photoactive materials. Employing these results, FTO/ZnO/CuO/Al HJSC were fabricated experimentally using sol-gel spin coating technique. Thereafter, photovoltaic characteristics of the cells were investigated under 1.5AM illumination that demonstrates an open-circuit voltage $(mathrm{V}_{oc})$ of 1.37 V, short circuit current $(mathrm{I}_{sc})$ of 2.86 mA, fill factor (FF) of 55% and photoconversion efficiency (PCE) exceeding 1.15 % those were 0.82 V, 14.96 mA/cm2, 52%, and 4.20 % respectively for simulation in where improvement of Voc and FF are noticeable. There is promising performance of home-made spin coated ZnO/CuO HJSC without any selective layer (hole transport and electron transport) and anti-reflection coating in open air. Above results indicates that sol-gel spin coating technique may be an effective and efficient way for fabricating thin film heterojunction solar cell by utilizing the opportunities for improving the cell performance.
本文对氧化锌(ZnO)和氧化铜(CuO)异质结太阳能电池的性能进行了模拟和自制研究。利用SCAPS-1D模拟器进行了模拟,并将模拟结果用于低成本、简单的自旋镀膜技术制备ZnO/CuO异质结太阳能电池(HJSC)。在较宽的窗口n-ZnO层厚度、吸收层p-CuO和光活性材料浓度范围内进行了模拟。在此基础上,采用溶胶-凝胶自旋镀膜技术制备了FTO/ZnO/CuO/Al HJSC。随后,在1.5AM光照下研究了电池的光伏特性,开路电压$( mathm {V}_{oc})$为1.37 V,短路电流$( mathm {I}_{sc})$为2.86 mA,填充因子(FF)为55%,光电转换效率(PCE)超过1.15%,分别为0.82 V, 14.96 mA/cm2, 52%和4.20%,其中Voc和FF的改善明显。自制的无空穴输运层和电子输运层的自旋镀膜ZnO/CuO HJSC在露天环境下具有良好的性能。以上结果表明,溶胶-凝胶自旋镀膜技术可能是制备薄膜异质结太阳能电池的一种有效途径,它利用了提高电池性能的机会。
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引用次数: 1
Delineating Common Cell Pathways that Influence Type 2 Diabetes and Neurodegenerative Diseases using a Network-based Approach 利用基于网络的方法描述影响2型糖尿病和神经退行性疾病的常见细胞通路
Utpala Nanda Chowdhury, Md. Al Mehedi Hasan, Shamim Ahmad, M. Islam, Julian M. W. Quinn, M. Moni
Type 2 diabetes (T2D) is a chronic metabolic dysfunction characterized by resistance to insulin. T2D can cause acute and chronic damage to the vascular and immune systems which can increase the risk or severity of other diseases. A welldocumented group of diseases affected by T2D incidence are the neurodegenerative diseases (NDD). However, the interaction or influence of T2D on NDD is still poorly understood because the clinical complexity of NDD and T2D make conventional endocrinological methodologies render this very difficult. As an alternative approach, we used a strategy to discover cellular pathways common to NDD and T2D employing transcriptional analysis of affected tissues. We examined microarray transcript datasets from studies comparing control individuals with T2D patients, and likewise control and NDD sufferers. The latter included Alzheimers disease (AD), Parkinsons disease (PD), Huntingtons disease (HD), multiple sclerosis disease (MSD), amyotrophic lateral sclerosis (ALS), frontotemporal dementia (FD), spinal muscular atrophy (SMA), Lewy body dementia (LBD) and epilepsy disorders (ED). Differentially expressed genes (DEG) for each selected pathologies were first identified then pairwise overlapping DEG between T2D and each NDD were identified by cross comparison. Gene set enrichment analysis (GSEA) was then undertaken for those common DEG using molecular pathway as well as gene ontology (GO) analysis. We thus uncovered new putative connections between pathological processes in T2D and NDD by identifying cell pathway commonalities. The findings were validated using Online Mendelian Inheritance in Man (OMIM) and dbGaP (gene SNP-disease association) databases for gold-standard benchmarking of their involvement in disease process. This methodology enables data-driven approaches to identify novel mechanisms affecting disease progressions and may enable prediction of disease co-morbidity development in a quantitative way.
2型糖尿病(T2D)是以胰岛素抵抗为特征的慢性代谢功能障碍。T2D可对血管和免疫系统造成急性和慢性损伤,从而增加其他疾病的风险或严重程度。受T2D影响的一类疾病是神经退行性疾病(NDD)。然而,T2D对NDD的相互作用或影响仍然知之甚少,因为NDD和T2D的临床复杂性使得传统的内分泌学方法非常困难。作为一种替代方法,我们使用了一种策略,通过对受影响组织的转录分析来发现NDD和T2D共有的细胞通路。我们检查了来自对照个体与T2D患者、对照个体与NDD患者比较研究的微阵列转录数据集。后者包括阿尔茨海默病(AD)、帕金森病(PD)、亨廷顿病(HD)、多发性硬化症(MSD)、肌萎缩性侧索硬化症(ALS)、额颞叶痴呆(FD)、脊髓性肌萎缩症(SMA)、路易体痴呆(LBD)和癫痫症(ED)。首先确定每种选定病理的差异表达基因(DEG),然后通过交叉比较确定T2D和每种NDD之间的两两重叠DEG。然后利用分子途径和基因本体(GO)分析对常见DEG进行基因集富集分析(GSEA)。因此,我们通过识别细胞通路的共性,揭示了T2D和NDD病理过程之间新的假定联系。使用在线孟德尔人类遗传(OMIM)和dbGaP(基因snp -疾病关联)数据库对其参与疾病过程的黄金标准基准进行了验证。这种方法使数据驱动的方法能够确定影响疾病进展的新机制,并可能以定量的方式预测疾病合并症的发展。
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引用次数: 3
A Systems Biology Approach to Identifying Genetic Markers that Link Progression of Parkinson’s Disease to Risk Factors related to Ageing, Lifestyle and Type 2 Diabetes 系统生物学方法鉴定帕金森病进展与衰老、生活方式和2型糖尿病相关危险因素的遗传标记
Najmus Sakib, Utpala Nanda Chowdhury, M. Islam, F. Huq, Julian M. W. Quinn, M. Moni
The processes that underlie Parkinsons disease (PD) are still unclear, but improved comprehension of genetic and environmental influences on PD, and how these influences interact will help find new approaches to reducing PD progression. We thus employed quantitative framework analysis to reveal some of the complex relationship of various genetic factors affecting PD. In this study, we analyzed gene expression microarray data from cells and tissues affected by PD, ageing (AG), type II diabetes (T2D), high body fat (HBF) and control datasets. We determined genetic associations of PD and these risk factors based on neighborhood-based benchmarking and multilayer network topology. We first identified 1343 significantly dysregulated genes in the PD patient tissues compared to healthy control, including we have 779 genes with down regulated expression and 544 genes up regulated. 45 genes were highly expressed in both for the PD and ageing; the number of shared genes for the PD and the type II diabetes is 51. Ontological and pathway analyses then identified significant gene ontology and molecular pathways that enhance our understanding of the fundamental molecular procedure of the PD progression. Therapeutic targets of the PD could be developed using these identified target genes, ontologies and pathways.
帕金森病(PD)的发病机制尚不清楚,但对遗传和环境对PD的影响以及这些影响如何相互作用的理解的提高将有助于找到减少PD进展的新方法。因此,我们采用定量框架分析来揭示影响帕金森病的各种遗传因素之间的一些复杂关系。在这项研究中,我们分析了来自PD、衰老(AG)、II型糖尿病(T2D)、高体脂(HBF)和对照数据集的细胞和组织的基因表达微阵列数据。我们基于邻域基准和多层网络拓扑确定PD与这些危险因素的遗传关联。与健康对照相比,我们首先在PD患者组织中发现了1343个显著失调的基因,其中779个基因表达下调,544个基因表达上调。PD和衰老均高表达的基因有45个;PD和II型糖尿病共有51个基因。本体论和途径分析确定了重要的基因本体论和分子途径,增强了我们对帕金森病进展的基本分子过程的理解。利用这些已确定的靶基因、本体论和途径,可以开发PD的治疗靶点。
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引用次数: 3
A Distributed Method Analysis for Enabling Device-to-Device Communications in Millimeter Wave Bands 毫米波波段设备对设备通信的分布式方法分析
M. Mitul, M. Mowla
In spite of having great potential supremacy, device-to-device (D2D) communications are facing lack of implementation in large scale. Insufficient bandwidth with high interference in the micro wave ($mu$Wave) band is the crucial complication behind it. Enabling D2D communications in millimeter wave (mmWave) band is considered as an alternative solution to these problems. However, line-of-sight (LOS) is a prerequisite for D2D devices to enable links in mmWave bands. In this paper, a distributed method is considered by which D2D devices can detect the existing LOS link for mmWave communication and further perform beam alignment. If there is scarcity of LOS link, this method permits the D2D devices to switch to $mu$Wave band. Stochastic geometry is considered for system modeling and analysis of this method. Various network criteria such as reference distance, blockage density, frequency, gain of antenna, beam width, density of D2D transmitters, power for D2D and path loss exponents for both LOS and NLOS links are taken into account for analyzing D2D network SINR (signal-to-interference-plus-noise-ratio) coverage probability against SINR threshold. Simulation results reveal that this distributed method has the better coverage probability compared to independently implied mmWave and $mu$Wave communication.
尽管设备到设备通信(D2D)具有巨大的潜在优势,但目前还缺乏大规模的实现。微波($mu$ wave)波段带宽不足和高干扰是其背后的关键问题。在毫米波(mmWave)频段中启用D2D通信被认为是解决这些问题的另一种解决方案。然而,视距(LOS)是D2D设备在毫米波频段中实现链路的先决条件。本文考虑了一种分布式方法,使D2D器件能够检测到已有的用于毫米波通信的LOS链路并进一步进行波束对准。如果LOS链路稀缺,该方法允许D2D器件切换到$mu$波段。该方法采用随机几何方法进行系统建模和分析。在分析D2D网络SINR(信噪比)覆盖概率相对于SINR阈值时,考虑了各种网络标准,如参考距离、阻塞密度、频率、天线增益、波束宽度、D2D发射机密度、D2D功率以及LOS和NLOS链路的路径损耗指数。仿真结果表明,与独立隐含的毫米波和毫米波通信相比,这种分布式方法具有更好的覆盖概率。
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引用次数: 1
期刊
2019 International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2)
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