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基于改进残差神经网络的家蚕日龄识别模型
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作者 田丁伊 石洪康 +2 位作者 祝诗平 陈肖 张剑飞 《中国农机化学报》 北大核心 2024年第2期259-266,共8页
家蚕日龄的准确识别有助于精准饲喂和动物福利,因此为准确识别家蚕生长时期中3龄第1天至5龄第7天,共14个日龄,在实际环境下采集特定家蚕品种,构建以14个日龄为单位的数据集。提出一种基于改进残差神经网络的Moga-ResNet,该方法在经典残... 家蚕日龄的准确识别有助于精准饲喂和动物福利,因此为准确识别家蚕生长时期中3龄第1天至5龄第7天,共14个日龄,在实际环境下采集特定家蚕品种,构建以14个日龄为单位的数据集。提出一种基于改进残差神经网络的Moga-ResNet,该方法在经典残差神经网络ResNet50的基础上,引入多阶门控机制以获取日龄图像的显著性特征。通过在同一个家蚕日龄数据集上开展模型训练与测试得到,Moga-ResNet的识别准确率为96.57%,F1值为96.57%,召回率为96.62%,与Swin Transformer、MobileNet v3、CSPNet和DenseNet四个经典模型的评价指标相比,Moga-ResNet在家蚕的日龄识别中具有较强的识别能力,可以为开展家蚕精准饲喂和数字化管理相关工作提供基础。 展开更多
关键词 家蚕 识别 多阶门控机制 残差神经网络
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基于达芬奇技术的日面活动图像处理与识别系统 被引量:3
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作者 胡新华 邓元勇 王先平 《计算机应用研究》 CSCD 北大核心 2008年第10期3165-3168,共4页
针对日面活动的多样性和复杂性,采用高性能的数字视频处理技术——达芬奇技术设计了日面活动图像处理与识别系统(SIPRS)。首先从SIPRS的系统架构出发,对系统的硬件设计进行了分析,特别是对DM6437与数字相机MDC1004之间的接口进行了详细... 针对日面活动的多样性和复杂性,采用高性能的数字视频处理技术——达芬奇技术设计了日面活动图像处理与识别系统(SIPRS)。首先从SIPRS的系统架构出发,对系统的硬件设计进行了分析,特别是对DM6437与数字相机MDC1004之间的接口进行了详细的分析;在软件上按系统功能需求规划出八个核心任务,实现了SIPRS基于Web的远程系统配置及日面活动图像的预处理、处理和识别功能。整个系统采用高性能数字媒体处理器、优化的实时操作系统和优化的图像处理与识别算法,完全满足太阳望远镜终端实时图像处理的要求。 展开更多
关键词 达芬奇技术 DM6437 数字相机 MDC-1004 面活动图像处理与识别系统 面活动 图像处理与识别
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基于对比度和共识日的交通速度预测 被引量:1
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作者 孙秋霞 孙砚琦 李勍 《山东科技大学学报(自然科学版)》 CAS 北大核心 2023年第2期108-116,共9页
交通速度预测是智能交通系统中研究热点内容之一,准确预测交通速度有助于为出行者提供可靠的出行决策。考虑到路网中交通速度变化的时空关联性和规律性,本研究提出一种基于对比度和共识日的交通速度预测方法。首先,为捕捉短时内速度的... 交通速度预测是智能交通系统中研究热点内容之一,准确预测交通速度有助于为出行者提供可靠的出行决策。考虑到路网中交通速度变化的时空关联性和规律性,本研究提出一种基于对比度和共识日的交通速度预测方法。首先,为捕捉短时内速度的变化特征,挖掘道路的空间关联性,构建对比度模型并根据其值更新历史数据的交通状态集;其次,采用K-means方法对更新后的数据集进行聚类,通过Rand指数识别出每簇的共识日,并根据其信息预测交通速度;最后,借助RMSE、MAE和ACC等指标分析了预测方法的有效性。分析结果表明,本研究方法预测准确率达93.8%,预测精度较高,计算速度较快,具有更好的适用性。 展开更多
关键词 智能交通 对比度 聚类分析 共识日识别 速度预测
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无网格法中一种处理本质边界的新方法
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作者 黄志强 郭妞萍 《纺织高校基础科学学报》 CAS 2007年第2期160-164,共5页
无网格伽辽金法中形函数一般不具有插值函数的特征,本质边界条件需特殊处理.在通过拉格朗日乘子识别法强加本质边界条件的基础上,为提高计算精度,再对修正泛函使用罚函数法来强加本质边界条件.该方法不仅没有增加未知量的数目,刚度矩阵... 无网格伽辽金法中形函数一般不具有插值函数的特征,本质边界条件需特殊处理.在通过拉格朗日乘子识别法强加本质边界条件的基础上,为提高计算精度,再对修正泛函使用罚函数法来强加本质边界条件.该方法不仅没有增加未知量的数目,刚度矩阵仍然正定带状,而且计算精度较高,对罚因子依赖性降低,能较好的模拟位移边界条件.以弹性力学问题为例进行了数值试验,计算结果表明,该方法不仅简单合理,而且具有较高的计算精度和数值稳定性. 展开更多
关键词 本质边界条件 移动最小二乘法 罚函数 拉格朗乘子识别
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基于集成学习的革什扎流域水情精准预测系统性能分析与试验研究
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作者 卿启维 张志辉 +1 位作者 侯坤 李均 《自动化应用》 2021年第8期6-11,共6页
利用水库来水下端数据推算水库来水,以水库来水上端数据为输入选取源,水库来水为输出选取源,构建基于典型日识别的水库来水分类型集成深度学习预报,建立吉牛水库来水预测模型,实现对吉牛水库不同季节、不同时段及不同气候等条件下来水... 利用水库来水下端数据推算水库来水,以水库来水上端数据为输入选取源,水库来水为输出选取源,构建基于典型日识别的水库来水分类型集成深度学习预报,建立吉牛水库来水预测模型,实现对吉牛水库不同季节、不同时段及不同气候等条件下来水的实时预测。从而实现对水库汛期洪峰、泥石流等险情进行预判,为电站负荷计划预申提供数据支撑。 展开更多
关键词 集成学习 来水预测模型 深度学习 日识别
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作物纬度适应性的研究进展 被引量:2
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作者 邱蕾蕾 欧阳鑫昊 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2022年第3期459-469,共11页
作物的纬度适应性是指在特定的生态环境,作物全生育期与该生态区作物生长季节保持一致,从而实现产量的最大化.光周期、温度等环境因素和植物内在遗传因素影响作物成花素基因表达,从而影响作物的开花时间,进而决定生育期的长短.为应对全... 作物的纬度适应性是指在特定的生态环境,作物全生育期与该生态区作物生长季节保持一致,从而实现产量的最大化.光周期、温度等环境因素和植物内在遗传因素影响作物成花素基因表达,从而影响作物的开花时间,进而决定生育期的长短.为应对全球气候变化和满足人们对粮食的大量需求,育种家通过育种和驯化使作物从起源地扩张至更广的区域以保障粮食安全.光周期基因的自然变异使作物的光周期敏感性发生变化,使作物能够调整自身开花时间来适应特定的生长环境,从而能够扩张到不同纬度地区.模式植物拟南芥(Arabidopsis thaliana)光周期信号调控网络的深入研究对于了解其他植物的光周期信号转导具有重要参考意义.水稻(Oryza sativa L.)、玉米(Zea mays L.)和大豆(Glycine max(Linn.)Merr.)是短日照作物,在向高纬度扩张时光周期敏感性钝化;小麦(Triticum aestivum L.)是长日照作物,光周期敏感性同样受到光周期基因影响.近年来,很多重要的光周期基因被克隆,不同纬度地区作物光周期基因型存在差异,揭示了作物纬度适应性的分子基础.该文围绕相关研究进展进行综述. 展开更多
关键词 光周期 成花素基因 纬度适应性 识别
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Distinguishing volcanic lithology using Self-Organizing Map 被引量:2
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作者 Ping ZHANG Baozhi PAN 《Global Geology》 2007年第1期74-77,共4页
Self-Organizing Map is an unsupervised learning algorithm.It has the ability of self-organization,self-learning and side associative thinking.Based on the principle it can identified the complex volcanic lithology.Acc... Self-Organizing Map is an unsupervised learning algorithm.It has the ability of self-organization,self-learning and side associative thinking.Based on the principle it can identified the complex volcanic lithology.According to the logging data of the volcanic rock samples,the SOM will be trained,The SOM training results were analyzed in order to choose optimally parameters of the network.Through identifying the logging data of volcanic formations,the result shows that the map can achieve good application effects. 展开更多
关键词 Self-Organizing Map volcanic rock lithology recognition logging data
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Authorship Identification of Classical Japanese Literature Using Quantitative Analysis
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作者 Gen Tsuchiyama Masakatsu Murakami 《Journal of Mathematics and System Science》 2013年第12期631-640,共10页
Singular authorship of"The Tale of Genji," which is the greatest accomplishment in classical Japanese literature, is doubtful In this study, we statistically analyze whether the author of Uji Jujo, which comprises t... Singular authorship of"The Tale of Genji," which is the greatest accomplishment in classical Japanese literature, is doubtful In this study, we statistically analyze whether the author of Uji Jujo, which comprises the last ten chapters of the "Tale of Ganji," is same as that of other chapters by using statistical analyses such as principal component analysis and random forests. The result of the analyses of word frequency shows that there is no obvious difference in word usage between the ten chapters and others. Thus, we conclude that it is highly possible that the chapters' author is same as that of others. 展开更多
关键词 STYLOMETRY authorship attribution classical Japanese literature principal component analysis random forests
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Japanese Media Strategy: The Recognition of Economic Value Chains
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作者 Seiko Yasumoto 《Journalism and Mass Communication》 2012年第10期998-1011,共14页
This paper examines, as a case study, Japanese media production, remaking, and transferences of media content derived from the manga Janguru Taitei (Jungle Emperor) and contemporary Japanese government strategies to... This paper examines, as a case study, Japanese media production, remaking, and transferences of media content derived from the manga Janguru Taitei (Jungle Emperor) and contemporary Japanese government strategies to protect and promote Japanese cultural and economic value within the content business. The study utilizes methodological triangulation inclusive of textual, document, and value chain analysis. The Japanese government has progressively appreciated the intrinsic value of the media content from both a commercial and cultural context and the loss of value in unregulated segments of the regional market. In 2003, they established an Intellectual Property Strategy Group to support and promote the Japanese media content business. There has been a continuum of policy development since then to protect and amplify the financial value of Japanese media products. All of the developments in media industry are fuelled not only by government regulations, the imagination of talented artists and writers, and the growing regionalization and internationalization of the industry but also the "bottom line" emerging from the value chain. The recognition of the need for sustaining profit growth to continue the viability of original and remade content in Japan is paramount for Japan. 展开更多
关键词 Japanese media strategy economic value chains ADAPTATION
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Verification of the Time Tsunami Attacked Coasting Ships Using AIS-Case of the 2011 Japan Tsunami
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作者 Hidenari Makino 《Journal of Earth Science and Engineering》 2013年第2期126-130,共5页
This research aims to elucidate the navigational situation of ships during the massive tsunami that occurred in the Tohoku district of Japan on March 11,2011. In particular, it focuses on the time the massive tsunami ... This research aims to elucidate the navigational situation of ships during the massive tsunami that occurred in the Tohoku district of Japan on March 11,2011. In particular, it focuses on the time the massive tsunami encountered ships. AIS (automatic identification system), which is required to be fitted aboard large ships for identifying and locating vessels, was used for the analysis of the navigational status of ships. It was confirmed that a group of ships sailing off the coast suddenly changed course. It was also verified that the ships had been struck by the tsunami, and the time of the strike was identified. The novelty and importance of this research are as follows. First, the behaviour of many ships that encountered the massive tsunami was clarified. There are no earlier instances of simultaneous and detailed recording of the behaviour of many ships encountering a massive tsunami. Second, the movement of the ships that encountered the tsunami was analysed, and the time of the maximum wave of the tsunami was verified. The research presents, for the first time in ship history, the status of a ship at the time of a tsunami using objective navigational data. 展开更多
关键词 Great East Japan earthquake TSUNAMI ship evacuation AIS.
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Postcolonialism and the Feminine in Paulina Chiziane's O alegre canto da perdiz
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作者 Algemira de Macedo Mendes Aurea Regina do Nascimento Santos 《Journal of Literature and Art Studies》 2016年第7期744-750,共7页
In this study we present the novel O alegre canto da perdiz (2008), by Paulina Chiziane, focusing on the path of the characters Delfina and Maria das Dores, pointing to the construction of a female speech denouncing... In this study we present the novel O alegre canto da perdiz (2008), by Paulina Chiziane, focusing on the path of the characters Delfina and Maria das Dores, pointing to the construction of a female speech denouncing the state to which the Mozambican woman was subjected, especially during colonization, a trauma still present in Africa. By telling the saga of these two women (mother and daughter), the novel also makes a reinterpretation of the origin and history of the peoples of Africa. Beyond the issues that mark the secular submission of women to the world of man in certain African societies, Paulina Chiziane also leads us to confront the issue of reductionism practiced by those who look from outside Africa and seeks to present its history and its literature as if the African continent were a single country, as reported by the Nigerian novelist Chimamanda Adichie in her speech against "the danger of listening and repeating a single story, the winners' story" (Adichie, 2009). We aim to identify aspects of the unique feminine of Paulina Chiziane by rescuing legends of matriarchy in the course of the characters. We will also do a reading of colonialism and post-colonialism objectifying the female of writing Paulina Chiziane. The critical placement of the text allows us to analyze it with the contribution of Spivak (2010), Said (1978), Bonnici (2000), among others. 展开更多
关键词 Paulina Chiziane O alegre canto da perdiz POST-COLONIALISM FEMININE
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Analysis of Ship Refuge Action in Tsunami Using AIS Data: Case of the 2011 East Japan Earthquake and Tsunami 被引量:1
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作者 HidenariMakino 《Journal of Shipping and Ocean Engineering》 2012年第6期380-385,共6页
A massive earthquake occurred in the Tohoku and Kanto regions of Japan on the 1 lth of March 2011. In response, a tsunami alert, a tsunami warning and an advisory were issued for the entire Pacific coast region. This ... A massive earthquake occurred in the Tohoku and Kanto regions of Japan on the 1 lth of March 2011. In response, a tsunami alert, a tsunami warning and an advisory were issued for the entire Pacific coast region. This research investigates the evacuation behavior of ships by AIS (automatic identification system) data in Onahama port after the tsunami warning was issued. The unusual behavior observed was attributed to the emergency evacuation of ships. This research investigates the evacuation behaviors of the vessels using the data obtained from AIS, around the Onahama Port during alerting the major tsunami warning. The result shows that most vessels in the port started evacuating approximately 10 min after the major tsunami warning and completed offshore evacuation 40 min after this warning. This contributed in understanding the actual status of the vessel evacuation. In addition, the travel paths of each vessel revealed the influence of the tsunami on the vessels. Furthermore, the exceptional situation where several vessels moved in the same direction at the speed almost same for about 2 hours was confirmed. As a result, it can be estimated that the waves that affected both vessels were the drawback of the tsunamis. 展开更多
关键词 Great east Japan earthquake TSUNAMI ship evacuation AIS.
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