Results 11 to 20 of about 17,289 (161)
International Journal of Applied Linguistics, EarlyView.ABSTRACT This computational linguistic study analyzes 8743 Rednote posts to examine how sentiment, emotion, and content domain collectively shape social comparison dynamics on social media. We identify four key findings: (1) an emotional gradient, where upward comparison content exhibits the highest sentiment scores and downward comparison the lowest; (
Michelle Mingyue Gu +7 more
wiley +1 more source
Synthesizing Empirical Research on Learner Metacognition in Second Language Writing
International Journal of Applied Linguistics, EarlyView.ABSTRACT Despite considerable research interest in learner metacognition in second language (L2) writing, there is not yet a review that synthesizes the existing empirical findings and discusses their implications. To fill the void, this systematic review synthesized 39 empirical studies on learner metacognition in L2 writing and examined their salient
Chen Li, Icy Lee, Zhicheng Mao
wiley +1 more source
Partisans' evaluations of unconstitutional legislative activity
Policy Studies Journal, EarlyView.Abstract In this research note, we examine whether public evaluations of a policy depend on the constitutionality of the process by which that policy was passed. We observe whether people's views depend on accusations that a policy was passed in violation of a state constitution's single subject rule, and whether the effect of that accusation depends ...
Kevin K. Banda +2 more
wiley +1 more source
智能科学与技术学报, 2021 面部表情识别是一种直接、有效的情绪识别模式。机器学习可以对图像表情进行形式化表征，但由于缺乏大脑的认知表征能力，在小样本数据集或复杂表情（伪装）数据集上的识别性能并不理想。针对此问题，将机器人工智能的形式化表征与人脑通用智能的情感认知能力结合，提出一种基于脑机协同智能的情绪识别方法。首先，从脑电图信号中提取脑电情感特征，以获取大脑对情绪的认知表征。其次，从情感图像中提取图像的视觉特征，以获取机器对情绪的形式化表征。为了增强机器模型的泛化能力，在特征学习中引入样本间的迁移适配 ...
刘栋军 +4 more
doaj
Design and Implementation of Face Recognition System Based on OpenCV and JavaCV [PDF]
, 2016 随着计算机和互联网的不断发展，在人工智能领域思想理论取得了一系列的发展，作为人工智能领域中发展较为突出的人脸识别技术取得了较为快速的发展。随着国家经济急速的发展，在社会各个领域对人脸识别技术的要求不断增加。人脸识别技术应用领域广泛，可以毫不夸张的说几乎可以覆盖整个社会的各个方面。上至国家信息安全，下到民生建设都有广泛的应用领域。现如今的生活中主要使用输入密码、插卡、获取口令等方式来保护个人信息和财产安全，这些传统的方法具有安全性低、易忘、易丢等缺点。随着技术的发展这些传统验证方式受到新技术的挑战 ...
江桥
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Lightweight and lead‐free radiation shielding materials remain urgently needed. This work designed a fluorite high‐entropy oxide (FHEO) system through a combined computational–experimental route. Density functional theory based on special quasi‐random structures was used to identify thermodynamically stable fluorites from a wide compositional ...
Xiangjie Duan +9 more
wiley +1 more source
Universal Steganalysis of Digital Image Based on Frequency Domain Partition [PDF]
, 2015 互联网技术在不断发展的同时，信息安全问题也显得愈为重要。信息隐藏技术作为信息安全领域的重要研究课题一直为人们所关注。隐写技术是信息隐藏的重要研究方向，它是将需要传输的秘密信息隐藏于看似无关的数字载体中，且不被第三者发现或截取，以达到秘密通信的目的。而隐写分析技术是对嵌入的秘密信息进行检测和提取，防止有害信息的传输给国家和人民带来损失，具有现实意义。本文主要研究的是以JPEG图像为载体的隐写分析技术。 目前，隐写分析技术可以分为两大类：一是特定隐写检测技术，二是盲检测技术。其中 ...
陈倩
core
Food and Energy Security, Volume 15, Issue 2, March/April 2026.ABSTRACT Net photosynthetic rate (Pn) serves as a key indicator for evaluating plant growth and yield. In order to explore an effective method for monitoring winter rapeseed Pn using unmanned aerial vehicle (UAV) multispectral technology, the winter rapeseed was taken as the research object and the multispectral images were obtained through UAVs in ...
ChengYang Ni +7 more
wiley +1 more source
Dolphins whistle contour automatic extraction and recovery [PDF]
, 2015 海豚是一种高智商的水生哺乳动物，它们使用自己独特的“语言”——哨声来进行互相交流。要想理解海豚的语言，就必须要对海豚哨声进行分析研究。当前对海豚哨声的分析研究大多是基于哨声语谱图进行的，但语谱图中哨声轮廓与背景噪声混合在一起，不仅导致目前对哨声的分割、提取等预处理都是用人工方式进行，同时也给后续的实验造增加了难度。如果对语谱图中的哨声轮廓进行去噪、特征提取和修复等自动化预处理，就能实时进行海豚哨声与背景噪声的分离，获得一个完整的海豚哨声轮廓。这不仅节约了人工提取花费的时间，也有利于海豚哨声的个体识别 ...
吴道曦
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Multimodal luminescent materials are crucial for advanced information encryption, real‐time dosimetry, and high‐resolution bioimaging, yet integrating orthogonal stimulus‐responsiveness into a single‐component system is challenging. Herein, we report a Pr3+‐doped Ca3Ga2Ge3O12 (CGGO: Pr3+) garnet phosphor that exhibits orthogonally addressable ...
Qi Chen +10 more
wiley +1 more source