通讯机构：
[Xuesong Yu] S;School of Economics and Management, Hubei Polytechnic University, Huangshi 435003, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
mask;green supply chain;anti-risk;pandemic
摘要：
Against the background of the pandemic, the mask supply chain faces the risk of pollution caused by discarded masks, the risk of insufficient funds of retailers, and the risk of mask overstock. To better guard against the above risks, this study constructed a two-party game model and a cusp catastrophe model from the perspective of the mask green supply chain, and studied the strategic choices of retailers and suppliers in the supply chain affected by the risk of capital constraints and overstock. The result shows that the risk shocks will lead to the disruption of the mask green supply chain, and the main factors affecting the strategy choice of mask suppliers and retailers are mask recycling rate, deposit ratio, risk occurrence time, etc. In further research, this study involved a mechanism for financial institutions, mask retailers, and the government to jointly deal with the risk of mask overstock, the risk of retailers’ insufficient funds, and the risk of environmental pollution from discarded masks. The research path and conclusion of this study reveal the risks in the circulation area of mask supplies during the pandemic, and provide recommendations for planning for future crises and risk prevention.
通讯机构：
[Fang Jia] S;School of Management, Wuhan Polytechnic University, Wuhan 430048, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
extreme risk spillover;green bond;clean energy;MVMQ-CAViaR;granger causality in risk
摘要：
This paper examines green bonds (GB), which have received much attention for providing funding for clean energy (CE) market reforms. We investigate the extreme spillover effects between GB and CE markets by using both MVMQ-CAViaR and Granger causality in risk methods over the period from 5 July 2011 to 24 February 2020. Since there are usually extreme asymmetric spillovers between financial markets, we examined whether this phenomenon exists between GB and CE markets. Our empirical analysis results find the significant extreme spillovers from GB to CE markets. In addition, we find that the upside and downside risk spillovers between GB and CE markets are asymmetric. The upside spillover is greater than downside spillover from GB to CE markets and the impact of GB on CE markets is greater. However, the extreme spillover from CE to GB markets is not significant by either the Granger causality in risk or the MVMQ-CAViaR model. Our findings have important implications for investors, policy makers and researchers.
作者机构：
[Xu, Beibei; Hu, Lintong; Jia, Fang; Li, Yanyin] Wuhan Polytech Univ, Sch Management, 36 Huanhu Middle Rd, Wuhan 430048, Peoples R China.;[Cao, Lihong] Hunan Univ, Business Sch, Lushan South Rd 2, Changsha 410082, Peoples R China.
通讯机构：
[Lihong Cao] B;Business School, Hunan University, Lushan South Road 2, Changsha 410082, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
It is a noteworthy phenomenon that institutional investors care more about the ESG performance of the firms in their portfolios in China. Exploring the role of institutional shareholders in firms' ESG performance is vital for corporate sustainable growth. Using a sample of publicly listed firms from 2013 to 2020 in China, through the OLS model, order logistic model, and tobit model, we found that firms with higher institutional ownership had better ESG performance, especially in the environmental (E) aspect. The positive effect of institutional investors on ESG performance is more pronounced in SOE firms, and firms in low pollution industries. Furthermore, mechanism tests suggest that institutional shareholders can incentivize firms to engage in ESG by affecting management change and board voting.
期刊：
International Journal of Environmental Research and Public Health,2022年19(20):13114- ISSN：1661-7827
通讯作者：
Zeyu Wang
作者机构：
[Gao, Shiya] Wuhan Polytech Univ, Sch Management, Wuhan 430023, Peoples R China.;[Dong, Xiufang; Wang, Zeyu] Guangzhou Univ, Sch Publ Adm, Guangzhou 510006, Peoples R China.;[Jiang, Shaoxiang] Peking Univ, Natl Sch Dev, Beijing 100871, Peoples R China.;[Ding, Wen] Univ Waterloo, Fac Engn, Waterloo, ON N2L 6J5, Canada.;[Wang, Yuchen] Johns Hopkins Univ, Carey Sch Business, Baltimore, MD 21202 USA.
通讯机构：
[Zeyu Wang] T;These authors contributed equally to this work.<&wdkj&>School of Public Administration, Guangzhou University, Guangzhou 510006, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
FCEM manufacturing enterprises;enterprise digital transformation;health and safety management;internet of things;big data technology;FCEM
摘要：
As far as we know, for large manufacturing enterprises, there is often a community of labor gathered around such enterprises, which is especially used as a place for the enterprise to place the labor force. This paper aimed to update the industry model of Chinese Manufacturing Enterprises (CMEs) to improve workers’ health management. This work first discusses the value, mode, and process of Enterprise Digital Transformation (EDT) and Worker Health and Safety Management (WHSM). Then, it proposes the CMEs-oriented EDT model and WHSM system based on Big Data Technology (BDT) and the Internet of Things (IoT). The proposed model and system are verified through a case study on the Shanghai BYD manufacturing enterprise (short for BYD) using the Fuzzy Comprehensive Evaluation Method (CFEM). The EDT model verification considers the adaptation and performance of enterprises after EDT. The WHSM system considers workers’ oxygen inhalation status to evaluate their heart and cardiovascular health. The results show that EDT improves the enterprise’s revenue and reshuffles the revenue structure. The EDT model has absolute adaptability to BYD. It has greatly improved BYD’s indexes, especially financial performance, market capability, and technical capability.
作者机构：
[Wang, Qian; Zhao, Lin; Wang, Mali; Zhang, Qipeng] Liaocheng Univ, Sch Geog & Environm, Dept Geog Informat Sci, Liaocheng 252059, Shandong, Peoples R China.;[Wu, Jinjia] Liaocheng Univ, Grand Canal Res Ctr, Grand Canal Res Inst, Liaocheng 252000, Shandong, Peoples R China.;[Zhou, Wei] Southwest Univ, Sch Geog Sci, Chongqing Jinfo Mt Karst Ecosyst Natl Observat &, Chongqing 400715, Peoples R China.;[Deng, Meie] Wuhan Polytech Univ, Sch Management, Wuhan 430048, Peoples R China.
通讯机构：
[Qipeng Zhang] D;Department of Geographic Information Science, School of Geography and Environment, Liaocheng University, Liaocheng 252059, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
random forest;grassland drought monitoring;SPEI;drought
摘要：
The accuracy of drought monitoring models is crucial for drought monitoring and early warning. Random forest (RF) is being used widely in the field of artificial intelligence. Nonetheless, the application of a random forest model in grassland drought monitoring research is yet to be further explored. In this study, various drought hazard factors were integrated based on remote sensing data, including from the Moderate Resolution Imaging Spectroradiometer (MODIS) and Global Precipitation Measurement (GPM), as multisource remote sensing data. Based on the RF, a comprehensive grassland drought monitoring model was constructed and tested in Inner Mongolia, China, as an example. The critical issue addressed is the construction of a grassland drought disaster monitoring model based on meteorological data and multisource remote sensing data by using an RF model, and the verification of the accuracy and reliability of its monitoring results. The results show that the grassland drought monitoring model could quantitatively monitor the drought situation in Inner Mongolia grasslands. There was a significantly positive correlation between the drought indicators output by the model and the standardized precipitation evapotranspiration index (SPEI) measured in the field. The correlation coefficients (R) between the drought degree were 0.9706 and 0.6387 for the training set and test set, respectively. The consistent rate between the model drought index and the SPEI reached 87.90%. Drought events in Inner Mongolia were monitored from April to September in wet years, normal years, and dry years using the constructed model. The monitoring results of the model constructed in this study were in accordance with the actual drought conditions, reflecting the development and spatial evolution of drought conditions. This study provides a new application method for the comprehensive assessment of grassland drought.
作者机构：
[Guo, Tiantian] Wuhan Polytech Univ, Sch Management, Wuhan 430023, Peoples R China.;[Wang, Jidong] Wuhan Univ, Sch Econ & Management, Wuhan 430072, Peoples R China.;[Wang, Jidong] Postal Savings Bank China Co Ltd, Hubei Branch, Wuhan 430028, Peoples R China.;[Li, Chen] Shanghai Univ Engn Sci, Sch Management, Shanghai 201620, Peoples R China.
通讯机构：
[Chen Li; Jidong Wang] A;Authors to whom correspondence should be addressed.<&wdkj&>School of Economics and Management, Wuhan University, Wuhan 430072, China<&wdkj&>Hubei Branch of Postal Savings Bank of China Co., Ltd., Wuhan 430028, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>School of Management, Shanghai University of Engineering Science, Shanghai 201620, China
摘要：
Although the development of tourism has a positive impact on local employment and economic growth, the high level of energy consumption and emissions generated by tourism have also attracted increasing attention. Based on the concept of tourism eco-efficiency, this article constructs a comprehensive evaluation system for tourism eco-efficiency in China, and the study concludes that (1) China's tourism eco-efficiency as a whole was in a fluctuating upward trend from 2002 to 2018, but different provinces of tourism eco-efficiency varied greatly, and the range of tourism eco-efficiency on spatial spill-over increased significantly; (2) the impact of tourism economic development on tourism eco-efficiency was not significant over time, and the impact of tourism eco-efficiency on the sustainable development of the tourism economy in the western region was weaker; (3) the contribution of tourism economic development to tourism eco-efficiency was low at the national level, with regional levels ranging from large to small for the western region, the central region, and the eastern region. The contribution of tourism eco-efficiency to the tourism economy was also low at the national level, with the central, eastern, and western regions ranked in descending order at the regional level.
通讯机构：
[YiLin Shao] V;[GaoShuo Li] M;[HanNing Lu; QingYuan Liu] S;Marine Engineering College,Dalian Maritime University,Dalian,China<&wdkj&>School of Management,Jinyinhu Campus of Wuhan Polytechnic University,Wuhan,China<&wdkj&>VPA School,Syracuse University,Syracuse,USA<&wdkj&>School of Communication Engineering,University of Electronic Science and Technology of China,Hangzhou,China
关键词：
Introduction;Materials and Methods;Results;Discussion;Conclusion;Abstract;Data Availability;Additional Points;Ethical Approval;Consent;Disclosure;Conflicts of Interests;Authors’ Contributions;Funding Statement;Acknowledgements;Acknowledgments;Supplementary Materials;Reference;Dataset Description;Dataset Files;Abstract;Introduction;Introduction and Materials;Introduction and Methods;Materials;Materials and Methods;Methods;Results;Discussion;Results and Discussion;Discussion and Conclusion;Results and Conclusion;Conclusion;Conclusions;Data Availability;Additional Points;Ethical Approval;Consent;Disclosure;Conflicts of Interest;Authors’ Contributions;Funding Statement;Acknowledgements;Supplementary Materials;References;Appendix;Abbreviations;Preliminaries;Introduction and Preliminaries;Notation;Proof of Theorem;Proofs;Analysis of Results;Examples;Numerical Example;Applications;Numerical Simulation;Model;Model Formulation;Systematic Palaeontology;Nomenclatural Acts;Taxonomic Implications;Experimental;Synthesis;Overview;Characterization;Background;Experimental;Theories;Calculations;Model Verification;Model Implementation;Geographic location;Study Area;Geological setting;Data Collection;Field Testing;Data and Sampling;Dataset;Literature Review;Related Works;Related Work;System Model;Methods and Data;Experimental Results;Results and Analysis;Evaluation;Implementation;Case Presentation;Case Report;Search Terms;Case Description;Case Series;Background;Limitations;Additional Points;Case;Case 1;Case 2 etc.;Concern Details;Retraction Details;Copyright;Related Articles
摘要：
Since the 3rd technological revolution, electronic information has developed at an increasingly rapid pace and has been widely used in various aspects of people's lives and social production. With the advent of the information society, information security is particularly important and is related to the security of various industries and fields, such as transportation, national defense, and economy. If there is a problem in information, it means that there is a problem in information countermeasures, which leads to the emergence of information countermeasures technology. At present, with the accelerated progress of socialization, the requirements for information technology talents have been raised accordingly, so schools are required to pay attention to the education and training of talents in this area to meet the needs of society and speed up the development of society. Moreover, more and more scholars are recognizing the significance of data analysis technology for education development, and some scholars have constructed learning prediction models from different educational environments and perspectives. However, some of the models have their own limitations and thus can hinder the parameter setting. Therefore, educational researchers need to combine the characteristics of their own educational environment to build a widely adaptable predictive model to provide a good foundation for the development of education. Also, on that basis, information confrontation technology should be applied to explore diverse teaching courses, improve the traditional teaching philosophy, improve the management and evaluation mechanism, provide students with diverse learning styles, emphasize the practical nature of learning, and continuously improve students' independent problem-solving ability.
摘要：
A theoretical investigation on the parabolic pulse nonlinear propagation and spectral compression in all-normal dispersion photonic crystal fibers (PCFs) is presented. It is found that use of larger chirp can obtain higher quality transform-limited spectrally compressed parabolic pulses due to almost purely the effects of self-phase modulation (SPM) — because of its all-normal dispersion with smaller group velocity dispersion (GVD). Also, use of long initial negatively chirped parabolic pulses can lead to the most efficient transform-limited spectral compression under the optimal compression condition.
关键词：
Pulse propagation and solitons;FWM gain;Dispersive wave generation;Photonic crystal fibers
摘要：
A theoretical investigation on the nonlinear pulse propagation and the influences of the dispersion effect on the dispersive wave generation in photonic crystal fibers is presented. By simulating the dispersive wave generation under different dispersion property conditions, it is found the origin of the dispersive wave generation is mainly due to the effect of higher-order dispersion and the pulse trapping. In addition, we also found that the intensity of the dispersive wave can be further enhanced by properly modifying the even-order dispersion coefficients to make the pulse trapping developing sufficiently.
