作者机构:
[Meng, Yanfang; Zhang, Anxun] Beijing Inst G Commun, Sch Journalism & Commun, Beijing, Peoples R China.;[Chung, Donghwa; Chung, DH] Cent China Normal Univ, Sch Journalism & Commun, Wuhan, Peoples R China.
通讯机构:
[Chung, DH ] C;Cent China Normal Univ, Sch Journalism & Commun, Wuhan, Peoples R China.
摘要:
With the threat of global warming, countries worldwide have enhanced their environmental campaigns on social media to increase users' willingness to take pro-environmental actions. In this study, we examined the direct and indirect effects of exposure to environmental information on Chinese young adults' (18-25 years old) intention to participate in environmental protection actions (e.g., recycling, using public transportation, involvement in an environmental group, and participation in eco-friendly events). Data were collected from a sample of 291 Chinese young adults using a web-based survey and a thoroughly designed questionnaire. The accumulated data were analyzed using SPSS version 20. Hierarchical regression and mediation analysis were performed for testing hypotheses. The results indicated that exposure to environmental information on Chinese social media platforms (WeChat and Xiaohongshu) positively affected individuals' intention to participate in pro-environmental behavior, perceived pro-environmental behavior control, pro-environmental attitude, and fear of victimization. The indirect effect demonstrated that pro-environmental behavior control and attitude mediated the relationship between exposure to environmental information on both WeChat and Xiaohongshu and the intention to participate in pro-environmental behavior. Extending the existing literature, this study provides empirical evidence on the influence of environmental information exposure on the intention to participate in environmental protection among Chinese adults. In addition, it provides valuable insights into the mediating mechanisms involving cognitive, psychological, and emotional factors in this relationship. Policy makers should implement effective pro-environmental promotions on social media to inspire individuals to engage in environmentally friendly actions. In addition, social media managers should strictly authenticate and remove misleading environmental content.
期刊:
Behaviour & Information Technology,2022年41(12):2560-2577 ISSN:0144-929X
通讯作者:
Xianhui Wang
作者机构:
[Xing, Wanli] Univ Florida, Sch Teaching & Learning, Educ Technol, Gainesville, FL USA.;[Wang, Xianhui] Cent China Normal Univ, Sch Journalism & Commun, Wuhan, Hubei, Peoples R China.
通讯机构:
[Xianhui Wang] S;School of Journalism and Communication, Central China Normal University, Wuhan, People’s Republic of China
关键词:
Use of data;data-driven decision;e-learning;ease of use perceptions and behavioural intentions
摘要:
With the advancement of digital technologies, big data and learning analytics have become prevalent in the higher education. Various student-facing systems increased the amount of data available to students, and whether students can use big data and learning analytics effectively will affect their academic success. Most studies, however, have focused on how teachers and administrative personnel use student data to make data-driven instruction and management decisions. As a result, little attention has been given to students' use of relevant data that generated by big data and learning analytics to promote their own learning and growth. This study explored using social cognitive theory to identify possible environmental, personal, and behavioural factors that affect students' data use. We used an online questionnaire that collected 242 completed surveys from Chinese university students. Partial Least Squares (PLS) path modelling was used to analyse the data. The initial findings support the conclusion that university students could be encouraged to effectively use data in three ways: (1) through the promotion of university-wide cultures of data use and sustained improvements in data quality, (2) through the professional development of student data literacy, and (3) through the support of student data autonomy, student data reflectiveness, and students' digital identities.
期刊:
Results in Physics,2020年17:103068- ISSN:2211-3797
通讯作者:
Mei, Tao
作者机构:
[Mei, Tao] Cent China Normal Univ, Dept Journal, Wuhan, Hubei, Peoples R China.
通讯机构:
[Mei, Tao] C;Cent China Normal Univ, Dept Journal, Wuhan, Hubei, Peoples R China.
关键词:
General relativity;Coordinate conditions;Vierbein;Hamiltonian representation;Fully singular Lagrange system;Canonical quantization
摘要:
Based on properties of six special gauge-fixing terms of tetrad, some coordinate conditions are presented, which lead to that all second time derivative terms of tetrad in Einstein equation are removed when general relativity is expressed by tetrad formulation; this result does not contradict the well known fact that the number of propagating degrees of freedom in general relativity equals two. Under these coordinate conditions, we prove that general relativity becomes a fully singular Lagrange system in terms of the vierbein forms of the action and the Hamiltonian representation of the system consisting of gravitation-Dirac-scalar-Maxwell fields; some properties of such system are discussed. By introducing six new variables to replace induced spatial metric, some properties of the coordinate conditions are presented, besides, the operator ordering of all the terms in the Hamiltonian and the Diffeomorphism constraints are fully determined after realizing canonical quantization of general relativity.
期刊:
Journal of the Indian Society of Remote Sensing,2018年46(3):355-366 ISSN:0255-660X
通讯作者:
Mao, Zhihua
作者机构:
[Wang, Zheng] Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210023, Jiangsu, Peoples R China.;[Wang, Zheng; Mao, Zhihua] Nanjing Univ, Collaborat Innovat Ctr South China Sea Studies, Nanjing 210023, Jiangsu, Peoples R China.;[Wang, Zheng; Mao, Zhihua] State Ocean Adm, Inst Oceanog 2, States Key Lab Satellite Ocean Environm Dynam, 36 Bochu North Rd, Hangzhou 310012, Zhejiang, Peoples R China.;[Xia, Junshi] Univ Tokyo, Res Ctr Adv Sci & Technol, Meguro Ku, 4-6-1 Komaba, Tokyo 1538904, Japan.;[Wang, Lihui] Chinese Acad Sci, Inst Geodesy & Geophys, 340 XuDong Rd, Wuhan 430077, Hubei, Peoples R China.
通讯机构:
[Mao, Zhihua] N;[Mao, Zhihua] S;Nanjing Univ, Collaborat Innovat Ctr South China Sea Studies, Nanjing 210023, Jiangsu, Peoples R China.;State Ocean Adm, Inst Oceanog 2, States Key Lab Satellite Ocean Environm Dynam, 36 Bochu North Rd, Hangzhou 310012, Zhejiang, Peoples R China.
关键词:
Hazy;Atmospheric correction;GF-1 WFV1
摘要:
Increasing hazy weather in the eastern area of China limits the potential application of high-resolution satellite data and poses a huge challenge for the atmospheric correction of remote sensing images. Consequently, it is necessary to find the most suitable atmospheric correction method under hazy condition. In this study, five kinds of atmospheric correction models, including 6S, COST, FLAASH, QUAC, and ATCOR2, are applied to the GaoFen-1 Wild Field Camera (GF-1 WFV1) data in the eastern area of China, and examined by both quantitative and qualitative analyses using the measured spectrum data. Experimental results indicated that ATCOR2 achieves the best performance among the atmospheric correction methods qualitatively and quantitatively. Hence, specifically for the study area and GF-1 WFV1 dataset, ATCOR2 is the most suitable atmospheric correction approach under hazy in the eastern area of China.
作者机构:
[Mei, Tao] Cent China Normal Univ, Dept Journal, Wuhan, Hubei, Peoples R China.
通讯机构:
[Mei, Tao] C;Cent China Normal Univ, Dept Journal, Wuhan, Hubei, Peoples R China.
摘要:
We present a class of gauge-invariant models of quantum electrodynamics with nonlocal interaction. The models have translation, Lorentz and gauge invariance and reduce to the conventional local quantum electrodynamics under the appropriate limit conditions, both the equations of motion of the charged particle and electromagnetic field obtained by the action principle lead to the normal form of current conservation. Quantization of the models is realized by taking advantage of the formalism based on the Yang-Feldman equations and the Lehmann-Symanzik-Zimmermann reduction formulas. Finally, we employ a special choice of the models to calculate the vacuum polarization as an example to demonstrate the possibility of establishing a theory of quantum electrodynamics without divergence.
期刊:
International Journal of Theoretical Physics,2015年54(10):3462-3489 ISSN:0020-7748
通讯作者:
Mei, T.
作者机构:
[Mei, T.; Mei, T] Cent China Normal Univ, Dept Journal, Wuhan, Hubei Pro, Peoples R China.
通讯机构:
[Mei, T.] C;Cent China Normal Univ, Dept Journal, Wuhan, Hubei Pro, Peoples R China.
关键词:
Long range order;Short range order;The spin-spin correlation functions;The spinor analysis method;The two-dimensional Ising model
摘要:
Some expressions of spin-spin correlation functions of the two-dimensional Ising model in the thermodynamic limit have been obtained, however, so far, no one correlation function that can show long range order of the model with finite size has been obtained. The purpose of this paper is to fill this gap. We present an exact closed formula for the correlation functions of the farthest pairs of spins in a column of the two-dimensional rectangular Ising model with periodic-free boundary condition and finite size by the spinor analysis method. The concrete expression correct to \(\mathrm {e}^{-LC_{0} }\) order of magnitude of such correlation functions is presented, from which it is shown clearly how long range order emerges as the decrease of the temperature. Some properties are discussed.
期刊:
Ars Combinatoria,2015年123:439-449 ISSN:0381-7032
通讯作者:
Zhang, Guanghui
作者机构:
[Zhang, Guanghui] Luoyang Normal Univ, Sch Math Sci, Luoyang 471022, Henan, Peoples R China.;[Zhu, Xiaokun] Cent China Normal Univ, Editorial Dept Journal, Wuhan 430079, Hubei, Peoples R China.
通讯机构:
[Zhang, Guanghui] L;Luoyang Normal Univ, Sch Math Sci, Luoyang 471022, Henan, Peoples R China.
摘要:
Let F-q be a finite field of odd order q. In this note the generator polynomials and the numbers of all self-dual and self-orthogonal cyclic and negacyclic codes of length 2(m) over F-q are precisely characterized.
作者:
Chen, C. L. Philip*;Li, Hong;Wei, Yantao;Xia, Tian;Tang, Yuan Yan
期刊:
IEEE Transactions on Geoscience and Remote Sensing,2014年52(1):574-581 ISSN:0196-2892
通讯作者:
Chen, C. L. Philip
作者机构:
[Chen, C. L. Philip] Univ Macau, Fac Sci & Technol, Dept Comp & Informat Sci, Macau, Peoples R China.;[Xia, Tian; Tang, Yuan Yan] Univ Macau, Fac Sci & Technol, Macau, Peoples R China.;[Li, Hong] Huazhong Univ Sci & Technol, Sch Math & Stat, Wuhan 430074, Peoples R China.;[Wei, Yantao] Cent China Normal Univ, Coll Informat Technol Journalism & Commun, Wuhan 430079, Peoples R China.;[Wei, Yantao] Huazhong Univ Sci & Technol, Inst Pattern Recognit & Artificial Intelligence, Wuhan 430074, Peoples R China.
通讯机构:
[Chen, C. L. Philip] U;Univ Macau, Fac Sci & Technol, Dept Comp & Informat Sci, Macau, Peoples R China.
关键词:
Derived kernel (DK);infrared (IR) image;local contrast;signal-to-noise ratio (SNR);target detection
摘要:
Robust small target detection of low signal-to-noise ratio (SNR) is very important in infrared search and track applications for self-defense or attacks. Consequently, an effective small target detection algorithm inspired by the contrast mechanism of human vision system and derived kernel model is presented in this paper. At the first stage, the local contrast map of the input image is obtained using the proposed local contrast measure which measures the dissimilarity between the current location and its neighborhoods. In this way, target signal enhancement and background clutter suppression are achieved simultaneously. At the second stage, an adaptive threshold is adopted to segment the target. The experiments on two sequences have validated the detection capability of the proposed target detection method. Experimental evaluation results show that our method is simple and effective with respect to detection accuracy. In particular, the proposed method can improve the SNR of the image significantly.
关键词:
Visual hull;Shape from images;Shape from silhouette;Viewing line
摘要:
Visual hull of object has been widely applied in many fields in computer vision. The methods computing visual hulls are mainly classified into two categories: surface-based approaches and volume-based approaches. Surface-based approaches are precise and lack robustness while volume-based approaches are robust but inaccurate and work slowly. However, the speeds of both methods cannot satisfy the demand of real-time application. The paper proposes a novel method to compute visual hull rapidly. To this aim, the method is based on viewing lines. First, the viewing lines are computed from all the contours of the object from different viewpoints. Secondly, the viewing lines are confined within limits and sampled into some dispersive points. Thirdly, a sequence of images of the object is used to exclude points which locate outside the surface of the visual hull. Finally, a water-tight surface of visual hull is extracted from the remnant points. Experiments with real data are conducted to test the rapidity of the proposed method. (C) 2013 Elsevier GmbH. All rights reserved.
期刊:
International Journal of Modern Physics B,2003年17(27):4841-4857 ISSN:0217-9792
通讯作者:
Mei, T
作者机构:
[Mei, T] Cent China Normal Univ, Editorial Dept Journal, Wuhan, Hubei, Peoples R China.
通讯机构:
[Mei, T] C;Cent China Normal Univ, Editorial Dept Journal, Wuhan, Hubei, Peoples R China.
关键词:
Tunneling effect;Cooper pairs;weak-link superconductor;multi-junctions;overstepping Josephson approximation;exact solution;elliptic function
摘要:
In this paper, tunneling effect of Cooper pairs in weak-link superconductor structure with multi-junctions under the condition for overstepping the Josephson approximation is discussed. The equations describing the electric current based on the tunneling effect of Cooper pairs in several kinds of weak-link superconductor structures with multi-junctions are obtained under the condition to overstep the Josephson approximation. For both SISISIS and a four junctions ring, when all junctions are in the zero voltage state, the exact solution of the equations is obtained. It is found that, because of the tunneling effect of the Cooper pairs, an alternating current exists which can be expressed by an elliptic function. For a four junctions ring, the relation between the period of the alternating current and flux is pointed out. At last, the condition for overstepping the Josephson approximation is discussed. The result shows that overstepping the Josephson approximation may be possible when the volumes of superconductors are small enough.