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An Interpretable CNN for the Segmentation of the Left Ventricle in Cardiac MRI by Real-Time Visualization 被引量:1
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作者 Jun Liu Geng Yuan +2 位作者 Changdi Yang Houbing Song Liang Luo 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第5期1571-1587,共17页
The interpretability of deep learning models has emerged as a compelling area in artificial intelligence research.The safety criteria for medical imaging are highly stringent,and models are required for an explanation... The interpretability of deep learning models has emerged as a compelling area in artificial intelligence research.The safety criteria for medical imaging are highly stringent,and models are required for an explanation.However,existing convolutional neural network solutions for left ventricular segmentation are viewed in terms of inputs and outputs.Thus,the interpretability of CNNs has come into the spotlight.Since medical imaging data are limited,many methods to fine-tune medical imaging models that are popular in transfer models have been built using massive public Image Net datasets by the transfer learning method.Unfortunately,this generates many unreliable parameters and makes it difficult to generate plausible explanations from these models.In this study,we trained from scratch rather than relying on transfer learning,creating a novel interpretable approach for autonomously segmenting the left ventricle with a cardiac MRI.Our enhanced GPU training system implemented interpretable global average pooling for graphics using deep learning.The deep learning tasks were simplified.Simplification included data management,neural network architecture,and training.Our system monitored and analyzed the gradient changes of different layers with dynamic visualizations in real-time and selected the optimal deployment model.Our results demonstrated that the proposed method was feasible and efficient:the Dice coefficient reached 94.48%,and the accuracy reached 99.7%.It was found that no current transfer learning models could perform comparably to the ImageNet transfer learning architectures.This model is lightweight and more convenient to deploy on mobile devices than transfer learning models. 展开更多
关键词 interpretable graphics training VISUALIZATION image segmentation left ventricle CNNS global average pooling
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3-D Seismic Imaging and Morpho-tectonical Interpretation of Saucerlike Dykes of the Tarim Flood Basalt Province, NW China
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作者 TIAN Wei WANG Lei 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第S1期166-,共1页
The detailed structures of the plumbing system of the early Permian Tarim flood basalt were investigated by 3-D seismic imaging.The images show that the Tarim flood basalt mainly erupted from central volcanoes distrib... The detailed structures of the plumbing system of the early Permian Tarim flood basalt were investigated by 3-D seismic imaging.The images show that the Tarim flood basalt mainly erupted from central volcanoes distributed 展开更多
关键词 D Seismic Imaging and Morpho-tectonical interpretation of Saucerlike Dykes of the Tarim Flood Basalt Province NW China
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Intravoxel incoherent motion magnetic resonance imaging for diagnosis of cervical cancer and evaluation of response of uterine cervical cancer to radiochemotherapy: A pilot study 被引量:1
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作者 Yanchun Wang Shan Hu +7 位作者 Xuemei Hu Jianjun Li Yaqi Shen Xiaoyu Liu Zhi Wang Xiaoyan Meng Zhen Li Daoyu Hu 《Oncology and Translational Medicine》 CAS 2015年第4期164-170,共7页
Objective The aim of this study was to investigate the ability of intravoxel incoherent motion(IVIM) diffusion-weighted magnetic resonance imaging(MRI) to diagnose cervical cancer and to evaluate the response of uteri... Objective The aim of this study was to investigate the ability of intravoxel incoherent motion(IVIM) diffusion-weighted magnetic resonance imaging(MRI) to diagnose cervical cancer and to evaluate the response of uterine cervical cancer to radiochemotherapy(CRT).Methods This prospective study was approved by the institutional review board, and informed consent was obtained from all patients. A total of 23 patients with primary cervical cancer who were undergoing CRT and 16 age-matched healthy subjects were prospectively recruited for IVIM(b = 0–800 s/mm2) and standard pelvic MRI. Bi-exponential analysis was performed to derive f(perfusion fraction), D*(pseudo-diffusion coefficient), and D(true molecular diffusion coefficient) in cervical cancer(n = 23) and the normal cervix(n = 16). The apparent diffusion coefficient(standard ADC) was calculated. The independent-samples t-test and paired-samples t-test were used for comparisons.Results Pre-treatment cervical cancer had the lowest standard ADC(1.15 ± 0.13 × 10-3 mm2/s) and D(0.89 ± 0.10 × 10-3 mm2/s) values, and these were significantly different from the normal cervix and posttreatment cervical cancer(P = 0.00). The f(16.67 ± 5.85%) was lowest in pre-treatment cervical cancer and was significantly different from the normal cervix and post-treatment cervical cancer(p = 0.012 and 0.00, respectively). No difference was observed in D*.Conclusion IVIM is potentially promising for differentiating between the normal cervix and cervical cancer because pre-treated cervical cancer has low perfusion and diffusion IVIM characteristics. Further, the standard ADC, D, and f of cervical cancer showed a tendency to normalize after CRT; thus, IVIM may be useful for monitoring the response to CRT in cervical cancer. 展开更多
关键词 diffusion-weighted imaging magnetic resonance imaging (MRI) investigate the ability of intravoxel incoherent motion (IVIM) cervical cancer RADIOCHEMOtheRAPY
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Classification and detection of dental images using meta-learning
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作者 Pradeep Kumar Yadalam Raghavendra Vamsi Anegundi +1 位作者 Mario Alberto Alarcón-Sánchez Artak Heboyan 《World Journal of Clinical Cases》 SCIE 2024年第32期6559-6562,共4页
Meta-learning of dental X-rays is a machine learning technique that can be used to train models to perform new tasks quickly and with minimal input.Instead of just memorizing a task,this is accomplished through teachi... Meta-learning of dental X-rays is a machine learning technique that can be used to train models to perform new tasks quickly and with minimal input.Instead of just memorizing a task,this is accomplished through teaching a model how to learn.Algorithms for meta-learning are typically trained on a collection of training problems,each of which has a limited number of labelled instances.Multiple Xray classification tasks,including the detection of pneumonia,coronavirus disease 2019,and other disorders,have demonstrated the effectiveness of meta-learning.Meta-learning has the benefit of allowing models to be trained on dental X-ray datasets that are too few for more conventional machine learning methods.Due to the high cost and lengthy collection process associated with dental imaging datasets,this is significant for dental X-ray classification jobs.The ability to train models that are more resistant to fresh input is another benefit of meta-learning. 展开更多
关键词 Artificial intelligence META-LEARNING Dental diagnosis Image segmentation Medical image interpretation Dental radiography
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Extravasated contrast volumetric assessment on computed tomography angiography in gastrointestinal bleeding:A useful predictor of positive angiographic findings
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作者 Laura Maria Cacioppa Chiara Floridi +11 位作者 Alessandra Bruno NicolòRossini Tommaso Valeri Alessandra Borgheresi Riccardo Inchingolo Francesco Cortese Giacomo Novelli Alessandro Felicioli Mario Torresi Pietro Boscarato Letizia Ottaviani Andrea Giovagnoni 《World Journal of Radiology》 2024年第5期115-127,共13页
BACKGROUND Gastrointestinal bleeding(GIB)is a severe and potentially life-threatening condition,especially in cases of delayed treatment.Computed tomography angiography(CTA)plays a pivotal role in the early identifica... BACKGROUND Gastrointestinal bleeding(GIB)is a severe and potentially life-threatening condition,especially in cases of delayed treatment.Computed tomography angiography(CTA)plays a pivotal role in the early identification of upper and lower GIB and in the prompt treatment of the haemorrhage.AIM To determine whether a volumetric estimation of the extravasated contrast at CTA in GIB may be a predictor of subsequent positive angiographic findings.METHODS In this retrospective single-centre study,35 patients(22 men;median age 69 years;range 16-92 years)admitted to our institution for active GIB detected at CTA and further submitted to catheter angiography between January 2018 and February 2022 were enrolled.Twenty-three(65.7%)patients underwent endoscopy before CTA.Bleeding volumetry was evaluated in both arterial and venous phases via a semi-automated dedicated software.Bleeding rate was obtained from volume change between the two phases and standardised for unit time.Patients were divided into two groups,according to the angiographic signs and their concordance with CTA.RESULTS Upper bleeding accounted for 42.9%and lower GIB for 57.1%.Mean haemoglobin value at the admission was 7.7 g/dL.A concordance between positive CTA and direct angiographic bleeding signs was found in 19(54.3%)cases.Despite no significant differences in terms of bleeding volume in the arterial phase(0.55 mL vs 0.33 mL,P=0.35),a statistically significant volume increase in the venous phase was identified in the group of patients with positive angiography(2.06 mL vs 0.9 mL,P=0.02).In the latter patient group,a significant increase in bleeding rate was also detected(2.18 mL/min vs 0.19 mL/min,P=0.02).CONCLUSION In GIB of any origin,extravasated contrast volumetric analysis at CTA could be a predictor of positive angiography and may help in avoiding further unnecessary procedures. 展开更多
关键词 Gastrointestinal haemorrhage Computed tomography angiography Volumetric analysis Computer-assisted image interpretation therapeutic embolization Transcatheter arterial embolization
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Photographic Image: Thematization of Its Discourses
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作者 Ricardo Crisafulli Rodrigues 《Journal of Signal and Information Processing》 2013年第4期414-422,共9页
This paper deals with thematization as a fundamental step towards the determination of photography image discourses in order to index them. It deals with questions related to photographic reality, polysemy, denotation... This paper deals with thematization as a fundamental step towards the determination of photography image discourses in order to index them. It deals with questions related to photographic reality, polysemy, denotation and connotation, whose comprehension is fundamentally important for the interpretation of photography discourses. It also approaches aspects that have influenced photography analysis towards its thematization, such as the characterization of an image bank, the functions performed by photos, as well as technical and visual quality. 展开更多
关键词 Descriptive ANALYSIS interpretative ANALYSIS Photographic CONNOTATION Photographic DENOTATION Imagetic Discourses thematic Discourses Photography IMAGE Photographic IMAGE POLYSEMY of Photographic IMAGE Photographic REFERENT thematization thematization of Photographic IMAGE thematization and Indexing
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The Only Possible Mirror Image of Interpreting by Means of Understanding in Modem Westem Philosophy
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作者 REN Rui 《Sino-US English Teaching》 2015年第9期736-743,共8页
Interpreting is one of the studies that is in the phase of its theoretical bottleneck. The difficulty comes from the lack of a possible holistic understanding of the phenomenon of interpreting, not to mention the mirr... Interpreting is one of the studies that is in the phase of its theoretical bottleneck. The difficulty comes from the lack of a possible holistic understanding of the phenomenon of interpreting, not to mention the mirror image of interpreting. Different linguistic studies could do nothing since nowadays their respective studies are mostly suffering their own research bottlenecks. Furthermore, it is impossible for individual linguistic studies to elaborate on the complicated interpreting practice. The only possible mirror is Modem Western Philosophy, which can present the image of interpreting. Such a mirror image is by no means possible without the full-fledged development of language study, and in particular, the uncovering of human understanding, in Modem Western Philosophy. 展开更多
关键词 MIRROR image interpretING Modern Western Philosophy
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Photogrammetry - Remote Sensing on the Study of Monuments and Historical Centers: The Effect of Hazards -The Case of Delphi Historical Center
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作者 Maria A. Lazaridou Evangelos N. Patmios 《Journal of Civil Engineering and Architecture》 2011年第2期180-184,共5页
Monuments and historical centers, because of their particular importance, are studied in multiple ways. The study concerns different scientific disciplines and technology. Photogrammetry and remote sensing contribute ... Monuments and historical centers, because of their particular importance, are studied in multiple ways. The study concerns different scientific disciplines and technology. Photogrammetry and remote sensing contribute essentially to this study, because of the valuable qualitative and quantitative information they offer. In this paper we search through the possibilities of very high resolution satellite imagery on historical centers study, referring to Delphi historical center. The study concerns image enhancement techniques and visual interpretation of Ikonos satellite imagery. Image enhancement techniques facilitate visual interpretation, detection and recognition, of the physiognomy and spatial arrangement of Delphi historical center and offer information about physical and architectural features in the wide area of the historical center. 展开更多
关键词 PHOtoGRAMMETRY remote sensing HAZARD image interpretation digital processing.
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Anisotropy interpretation and the coherence research between resistivity and acoustic anisotropy in tight sands
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作者 LI Chaoliu YUAN Chao +3 位作者 LI Xia FENG Zhou SONG Lianteng WANG Lei 《Petroleum Exploration and Development》 2020年第2期463-470,共8页
Aiming at the problem of anisotropy inversion of tight sands, a new method for extracting resistivity anisotropy from array laterolog and micro-resistivity scanning imaging logging is proposed, and also the consistenc... Aiming at the problem of anisotropy inversion of tight sands, a new method for extracting resistivity anisotropy from array laterolog and micro-resistivity scanning imaging logging is proposed, and also the consistency of electric and acoustic anisotropy is discussed. Array laterolog includes resistivity anisotropy information, but numerical simulation shows that drilling fluid invasion has the greatest influence on the response, followed by the relative dip angle θ and electrical anisotropy coefficient λ. A new inversion method to determine ri, Rxo, Rt and λ is developed with the given θ and initial values of invasion radius ri, flushed zone resistivity Rxo, in-situ formation resistivity Rt. Micro-resistivity image can also be used for describing the resistivity distribution information in different directions, and the electrical characteristics from micro-resistivity log in different azimuths, lateral and vertical, can be compared to extract electric anisotropy information. Directional arrangement of mineral particles in tight sands and fracture development are the intrinsic causes of anisotropy, which in turn brings about anisotropy in resistivity and acoustic velocity, so the resistivity anisotropy and acoustic velocity anisotropy are consistent in trends. Analysis of log data of several wells show that the electrical anisotropy and acoustic anisotropy extracted from array laterolog, micro-resistivity imaging and cross-dipole acoustic logs respectively are consistent in trend and magnitude, proving the inversion method is accurate and the anisotropies of different formation physical parameters caused by the intrinsic structure of tight sand reservoir are consistent. This research provides a new idea for evaluating anisotropy of tight sands. 展开更多
关键词 tight sands ANISOTROPY PETROPHYSICS array laterolog micro-resistivity imaging log interpretation
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The Differences between Chinese and Western Cultures based on the Animal Images in Idioms
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作者 Zhao Meiyan 《Contemporary Social Sciences》 2017年第2期89-97,共9页
Chinese idioms,like English proverbs,are a language form,with a certain philosophical motive and ideological basis,given meaning through people's lifelong experiences.Throughout the ages,a wide range of beliefs,cu... Chinese idioms,like English proverbs,are a language form,with a certain philosophical motive and ideological basis,given meaning through people's lifelong experiences.Throughout the ages,a wide range of beliefs,customs and natural scenery have been condensed into text forms in both Chinese idioms and English proverbs that display certain aspects of the essence of the two cultures.This paper focuses on the study of animal images in idioms,and elaborates on the different interpretations of specific images caused by the differences in history,regions,customs,and values of the two cultures.The purpose of this research is to provide a breakthrough more relevant to students who devote themselves to the study and research of Chinese and English languages and culture from the perspective of cultural contrast and analysis,so as to make a more thorough understanding of differences between Chinese and Western customs,culture and ideology.Therefore,language translations and cultural communications can be improved through a more accurate understanding of the Chinese and Western cultures. 展开更多
关键词 idiom interpretation animal images culture differences
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The New Critical Reading of Desert Places
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作者 邴照宇 《海外英语》 2013年第8X期170-171,共2页
From the perspective of new criticism, this article attempts at a profound study of Robert Frost's Desert Places so as to better understand the value, reveal the meaning and enjoy the charm of this works.
关键词 NEW CRITICISM close-reading interpretative READING
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THE APPLICATION OF REMOTE SENSING TECHNIQUE ON GEOLOGICAL INVESTIGATION OF PLACER DEPOSIT
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作者 万恩璞 溥立群 +2 位作者 王野乔 陈春 刘殿伟 《Chinese Geographical Science》 SCIE CSCD 1991年第2期72-84,共13页
The practice has proved that it is an economic and effective method to investigate placer gold deposit by using multi-level information sources of remote sensing and multi-variate analysis methods, especially for the ... The practice has proved that it is an economic and effective method to investigate placer gold deposit by using multi-level information sources of remote sensing and multi-variate analysis methods, especially for the area with a sparse population and difficult condition like the Da Hinggan Mountains, China.The information sources used in our work includes Landsat TM, aerial infrared photography and their mosaic image maps and enlarged photos with different scales. According to statistic data, in the study area the gold-bearing rocks are mainly granite, alaskite, granodiorite and some old metamorphic rocks. On gold-bearing geological structures, the fault zones in the four directions (NE, NNE, NW and EW) are obvious, in which NNE and EW are the most key fault zones. On fluvial geomorphology the flow courses stored placer are in the tributaries of the 4th and 5th levels, especially in straight or slight curve reaches. On the basis of analysis the interpretative signs were set up, and the interpretative 展开更多
关键词 REMOTE sensing Nenjiang River PLACER GOLD DEPOSIT image processing interpretative SIGNS perspective effect
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Research on the Perceptual Law of Artificial Ants
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作者 ZHENG Zhaobao 《Geo-Spatial Information Science》 2005年第3期157-162,共6页
Beginning with the analysis of the behavior of natural ants, this paper illuminates the principle and method that, by adopting image texture energy as pheromone and finding their way on the track of the pheromone, art... Beginning with the analysis of the behavior of natural ants, this paper illuminates the principle and method that, by adopting image texture energy as pheromone and finding their way on the track of the pheromone, artificial ants have the ability to identify and remember through similar measurement of pheromone. Based on the quantity of experiments, this paper analyzes some factors that influence the ability of artificial ants and draws some conclusions about the law of ant perception. 展开更多
关键词 artificial ants image interpretation perception law
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Classification and structural characteristics of amorphous materials based on interpretable deep learning
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作者 崔佳梅 李韵洁 +1 位作者 赵偲 郑文 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第9期356-363,共8页
Defining the structure characteristics of amorphous materials is one of the fundamental problems that need to be solved urgently in complex materials because of their complex structure and long-range disorder.In this ... Defining the structure characteristics of amorphous materials is one of the fundamental problems that need to be solved urgently in complex materials because of their complex structure and long-range disorder.In this study,we develop an interpretable deep learning model capable of accurately classifying amorphous configurations and characterizing their structural properties.The results demonstrate that the multi-dimensional hybrid convolutional neural network can classify the two-dimensional(2D)liquids and amorphous solids of molecular dynamics simulation.The classification process does not make a priori assumptions on the amorphous particle environment,and the accuracy is 92.75%,which is better than other convolutional neural networks.Moreover,our model utilizes the gradient-weighted activation-like mapping method,which generates activation-like heat maps that can precisely identify important structures in the amorphous configuration maps.We obtain an order parameter from the heatmap and conduct finite scale analysis of this parameter.Our findings demonstrate that the order parameter effectively captures the amorphous phase transition process across various systems.These results hold significant scientific implications for the study of amorphous structural characteristics via deep learning. 展开更多
关键词 AMORPHOUS interpretable deep learning image classification finite scale analysis
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基于改进HRNet的遥感影像冬小麦语义分割方法 被引量:1
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作者 李旭青 吴冬雪 +2 位作者 王玉博 陈文博 顾会涛 《农业工程学报》 EI CAS CSCD 北大核心 2024年第3期193-200,共8页
冬小麦在影像中呈现田块碎小且分布零散等空间特征,同时影像包含的复杂地物对冬小麦识别造成干扰,易出现识别精度低且边界分割模糊等问题。为及时准确获取大范围冬小麦空间分布信息,该研究以高分二号卫星影像作为数据源,提出一种CAHRNet... 冬小麦在影像中呈现田块碎小且分布零散等空间特征,同时影像包含的复杂地物对冬小麦识别造成干扰,易出现识别精度低且边界分割模糊等问题。为及时准确获取大范围冬小麦空间分布信息,该研究以高分二号卫星影像作为数据源,提出一种CAHRNet(change attention high-resolution Net)语义分割模型。采用HRNet(high-resolution Net)替换ResNet作为模型的主干网络,网络的并行交互方式易获取高分辨率的特征信息;联合OCR(object-contextual representations)模块聚合上下文信息,以增强像素点与目标对象区域的关联性;3)引入坐标注意力(coordinate attention)机制,使网络模型充分利用有效的空间位置信息,以保留分割区域的边缘细节,提高对分布零散、形状多变的冬小麦田块的特征提取能力。试验结果表明,在自制的高分辨率遥感数据集上,CAHRNet模型的平均交并比(mean intersection over union,MIoU)和像素准确率(pixel accuracy, PA)分别达到81.72%和97.08%,MIoU相较U-Net、DeepLabv3+分别提高了9.09、2.44个百分点;PA相较U-Net、DeepLabv3+分别提高6.80、1.59个百分点,说明CAHRNet模型具有较高的分割识别精度,可为进一步准确获取冬小麦作物分布信息提供技术支撑。 展开更多
关键词 深度学习 语义分割 遥感影像 冬小麦 智能解译
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矩形空洞探地雷达成像曲线厚度变化规律研究 被引量:1
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作者 韩佳明 马鑫 刘宇辰 《雷达科学与技术》 北大核心 2024年第2期180-186,共7页
由于城市基础建设不断地翻新改造,引发城市地下空洞滋生问题。通过探地雷达扫描技术,对地下矩形空洞整个探测过程进行研究,将探测过程划分为四个阶段,研究了成像曲线厚度变化规律。对探地雷达水平运行时矩形空洞的成像曲线厚度变化规律... 由于城市基础建设不断地翻新改造,引发城市地下空洞滋生问题。通过探地雷达扫描技术,对地下矩形空洞整个探测过程进行研究,将探测过程划分为四个阶段,研究了成像曲线厚度变化规律。对探地雷达水平运行时矩形空洞的成像曲线厚度变化规律进行分析,对不同大小下的矩形空洞点测时曲线厚度进行研究,并通过实际探测案例来解释矩形空洞成像曲线厚度变化规律,结果表明探地雷达探测矩形空洞时其成像曲线厚度为先增加后减小的对称曲线,其曲线厚度最大处在图像上为水平弧段两端,位于实际矩形空洞对角线附近;雷达点测时成像曲线厚度随矩形空洞变大而增加,在图像上表现为空洞越大线条越粗。 展开更多
关键词 雷达工程 矩形空洞 探地雷达 曲线厚度 成像机理 图像解释
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矿物组分识别与智能解释在不同岩性之间的信息共享与迁移学习 被引量:1
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作者 刘烨 韩雨伯 朱文瑞 《地学前缘》 EI CAS CSCD 北大核心 2024年第4期95-111,共17页
在地球科学领域,岩石微观观测数据的采集过程繁琐且效率低下,这不仅增加了研究成本,降低了可靠性,同时也限制了数据的开源共享。此外,由于岩性的多样性和观测手段的差异,单一数据集的规模通常较小,这对于依赖大规模数据集的深度学习框... 在地球科学领域,岩石微观观测数据的采集过程繁琐且效率低下,这不仅增加了研究成本,降低了可靠性,同时也限制了数据的开源共享。此外,由于岩性的多样性和观测手段的差异,单一数据集的规模通常较小,这对于依赖大规模数据集的深度学习框架而言是一大挑战。为此,本研究探索迁移学习如何促进不同岩性间的信息共享,并通过此机制提高矿物组分识别与智能解释任务的模型性能。通过采集不同区域、岩性、矿物组分和偏光模式下的铸体薄片样本,本文深入研究了深度学习模型在不同观测对象和手段下的迁移学习机制,并聚焦于探索地质信息的深层表征。研究成果不但揭示了迁移学习在促进地质学领域信息共享与模型性能提升中的关键作用,还为自动化和智能化地质认识融合奠定了基础。实验结果显示,通过迁移学习,本文模型在智能解释任务中的准确率显著提高,从53.3%提高至98.73%,而在矿物组分识别任务中,准确率也实现了近10%的提升。这些成果证明了迁移学习在地质学领域内解决实际问题和提高模型泛化能力、性能和稳定性方面的巨大潜力。 展开更多
关键词 迁移学习 薄片矿物组分识别 薄片图像智能解释 地质认识融合
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基于BPNN的在线学习者元认知能力评估
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作者 王洪江 陈沛瑜 +2 位作者 李作锟 张一夫 李南希 《现代教育技术》 CSSCI 2024年第11期132-142,共11页
元认知能力被认为是提升学习者在线学习效果的关键因素,其有效评估对于教育教学具有重要意义。但是,当前基于在线学习行为的元认知能力评估方法存在指标选取有差异、不全面且权重模糊等问题。对此,文章首先设计了基于BPNN的学习者元认... 元认知能力被认为是提升学习者在线学习效果的关键因素,其有效评估对于教育教学具有重要意义。但是,当前基于在线学习行为的元认知能力评估方法存在指标选取有差异、不全面且权重模糊等问题。对此,文章首先设计了基于BPNN的学习者元认知能力评估研究框架,通过数据采集和标准化处理,得到19个在线学习行为指标。接着,文章进行了教学实验,通过相关性分析得到11个与元认知能力显著正相关的行为指标,并构建了基于BPNN的元认知能力评估模型。随后,文章进行了模型的性能验证,发现BPNN模型的整体性能和分类性能均最优;同时,文章从行为指标的重要性、影响情况和个体贡献度三个角度进行了模型的可解释性分析,以利于教师做出更科学、合理的教育决策。最后,文章从学习空间、学习资源、教师角色三个方面对BPNN模型的教学应用进行了展望。文章构建的BPNN模型能够准确评估和可视化解释元认知能力,有助于个性化教育教学的开展,从而为教育评估研究提供发展方向。 展开更多
关键词 元认知能力 BPNN 行为指标 算法模型 可解释性
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正反案例学习结合情景演绎在新入职护士人文关怀能力培训中的应用研究
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作者 袁芳 冯勤 +1 位作者 钱援芳 徐东娥 《中华护理教育》 CSCD 2024年第10期1218-1223,共6页
目的探究正反案例学习结合情景演绎的方法在新入职护士人文关怀能力培训中的应用效果。方法选取2021年8月入职的38名新护士作为对照组,2022年8月入职的40名新护士作为试验组。在护理部开展人文关怀理论课程培训的基础上,对照组每月实施... 目的探究正反案例学习结合情景演绎的方法在新入职护士人文关怀能力培训中的应用效果。方法选取2021年8月入职的38名新护士作为对照组,2022年8月入职的40名新护士作为试验组。在护理部开展人文关怀理论课程培训的基础上,对照组每月实施传统的正面案例情境模拟培训,试验组实施正反案例学习结合情景演绎培训,即包括正面案例和反面缺陷案例的演绎和反思分析,培训共6个月。评价并比较培训前后两组人文关怀能力和共情能力。结果培训后,试验组人文关怀能力总分(206.95±2.63)高于对照组(187.18±4.86),试验组共情能力总分(101.13±1.60)高于对照组(82.21±1.75),组间差异均具有统计学意义(P<0.05)。结论采用正反案例学习结合情景演绎培训有助于提高新入职护士的人文关怀能力和共情能力。 展开更多
关键词 在职培训 正反案例 情景演绎 新入职护士 人文关怀能力
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视频侦查技术关键及其发展展望 被引量:1
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作者 赵秀萍 《辽宁警察学院学报》 2024年第2期79-87,共9页
视频侦查技术的核心是通过视频图像的提取、查看、分析和研判来获取侦查线索、固定涉案证据。多年来经过在实战应用中不断地发展创新,视频侦查技术形成了自己独特的关键技术体系:视频信息分析解读技术是侦查应用和证据固定的基础和核心... 视频侦查技术的核心是通过视频图像的提取、查看、分析和研判来获取侦查线索、固定涉案证据。多年来经过在实战应用中不断地发展创新,视频侦查技术形成了自己独特的关键技术体系:视频信息分析解读技术是侦查应用和证据固定的基础和核心;视频证据固定保全技术的规范是审判中心主义的客观要求,可以获取视频侦查记录报告、视频检验鉴定报告或视频数据关联报告;低质量视频图像的增强恢复技术专业性强,应用范围窄,技术成熟度高,然而它不断面临新的挑战。目前,视频数据的智能应用在大数据背景下变得越来越重要,仍需进一步突破视频自动识别技术的应用范畴,建立完善多层次的视频数据综合应用体系,打造适应不同业务需要的视频数据实战应用模型。 展开更多
关键词 视频侦查技术 视频解析 证据固定 图像处理 数据智能
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