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Risk assessment of oil and gas investment environment in countries along the Belt and Road Initiative 被引量:1
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作者 Bao-Jun Tang Chang-Jing Ji +3 位作者 Yu-Xian Zheng Kang-Ning Liu Yi-Fei Ma Jun-Yu Chen 《Petroleum Science》 SCIE EI CAS CSCD 2024年第2期1429-1443,共15页
With the implementation of the Belt and Road Initiative, China is deepening its cooperation in oil and gas resources with countries along the Initiative. In order to better mitigate risks and enhance the safety of inv... With the implementation of the Belt and Road Initiative, China is deepening its cooperation in oil and gas resources with countries along the Initiative. In order to better mitigate risks and enhance the safety of investments, it is of significant importance to research the oil and gas investment environment in these countries for China's overseas investment macro-layout. This paper proposes an indicator system including 27 indicators from 6 dimensions. On this basis, game theory models combined with global entropy method and analytic hierarchy process are applied to determine the combined weights, and the TOPSIS-GRA model is utilized to assess the risks of oil and gas investment in 76 countries along the Initiative from 2014 to 2021. Finally, the GM(1,1) model is employed to predict risk values for 2022-2025. In conclusion, oil and gas resources and political factors have the greatest impact on investment environment risk, and 12 countries with greater investment potential are selected through cluster analysis in conjunction with the predicted results. The research findings may provide scientific decisionmaking recommendations for the Chinese government and oil enterprises to strengthen oil and gas investment cooperation with countries along the Belt and Road Initiative. 展开更多
关键词 Belt and Road initiative Oil and Gas Investment Risk assessment
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Enhancing Private Healthcare Effectiveness in Lagos State, Nigeria: An Overview of the Effect of Quality Improvement Initiatives and Implications for Sustainable Healthcare Delivery
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作者 Nnenna Mba-Oduwusi Ifesinachi Eze +11 位作者 Tochukwu Osuji Maxwell Obubu Tolulope Oyekanmi Oluwatosin Kolade Ozioma Oguguah Jane Martins Nkata Chuku Alozie Ananaba Rodio Diallo Firdausi Umar Sadiq Emmanuella Zamba Abiola Idowu 《Health》 2024年第2期93-104,共12页
Background: Nigeria, a nation grappling with rapid population growth, economic intricacies, and complex healthcare challenges, particularly in Lagos State, the economic hub and most populous state, faces the challenge... Background: Nigeria, a nation grappling with rapid population growth, economic intricacies, and complex healthcare challenges, particularly in Lagos State, the economic hub and most populous state, faces the challenge of ensuring quality healthcare access. The overview of the effect of quality improvement initiatives in this paper focuses on private healthcare providers in Lagos State, Nigeria. The study assesses the impact of donor-funded quality improvement projects on these private healthcare facilities. It explores the level of participation, perceived support, and tangible effects of the initiatives on healthcare delivery within private healthcare facilities. It also examines how these initiatives influence patient inflow and facility ratings, and bring about additional benefits and improvements, provides insights into the challenges faced by private healthcare providers in implementing quality improvement projects and elicits recommendations for improving the effectiveness of such initiatives. Methods: Qualitative research design was employed for in-depth exploration, utilizing semi-structured interviews. Private healthcare providers in Lagos involved in the SP4FP Quality Improvement Project were purposively sampled for diversity. Face-to-face interviews elicited insights into participation, perceived support, and project effects. Questions covered participation levels, support perception, changes observed, challenges faced, and recommendations. Thematic analysis identified recurring themes from interview transcripts. Adherence to ethical guidelines ensured participant confidentiality and informed consent. Results: Respondents affirmed active involvement in the SP4FP Quality Improvement Project, echoing literature emphasizing private-sector collaboration with the public sector. While acknowledging positive influences on facility ratings, respondents highlighted challenges within the broader Nigerian healthcare landscape affecting patient numbers. Respondents cited tangible improvements, particularly in staff management and patient care processes, validating the positive influence of quality improvement projects. Financial constraints emerged as a significant challenge, aligning with existing literature emphasizing the pragmatic difficulties faced by private healthcare providers. Conclusions: This study illuminates the complex landscape of private healthcare provision in Lagos State, emphasizing the positive impact of donor-funded quality improvement projects. The findings provide nuanced insights, guiding policymakers, healthcare managers, and practitioners toward collaborative, sustainable improvements. As Nigeria progresses, these lessons will be crucial in shaping healthcare policies prioritizing population well-being. 展开更多
关键词 Private Healthcare Quality Improvement Projects Donor-Funded initiatives Healthcare Delivery Lagos State NIGERIA
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UNEP welcomes China to international decarbonization initiative
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作者 Hou Liqiang 《建筑节能(中英文)》 CAS 2024年第2期143-143,共1页
An official with the United Nations Environment Programme has welcomed China’s participation in an international initiative that aims to decarbonize the building sector,saying it offers the opportunity for China to s... An official with the United Nations Environment Programme has welcomed China’s participation in an international initiative that aims to decarbonize the building sector,saying it offers the opportunity for China to share its valuable experiences and insight on promoting green buildings.Jonathan Duwyn,program officer of UNEP’s buildings and construction cities unit,made the remarks in a recent interview with China Daily,following the launch of the Buildings Breakthrough on Dec.6at COP28United Nations climate change conference in Dubai,the United Arab Emirates. 展开更多
关键词 UNEP INTERVIEW initiative
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Innovation Analysis of Rural Agricultural Economic Management Model in the Context of the Belt and Road Initiative
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作者 Huabin TANG 《Asian Agricultural Research》 2024年第6期11-12,18,共3页
[Objectives]To explore innovative strategies for rural agricultural economic development in the context of the Belt and Road Initiative.[Methods]This research adopts the method of literature review and field research,... [Objectives]To explore innovative strategies for rural agricultural economic development in the context of the Belt and Road Initiative.[Methods]This research adopts the method of literature review and field research,systematically combs the research results related to the Belt and Road Initiative and rural agricultural economic management,and deeply understands the actual situation of rural agricultural economic management.[Results]The research shows that in the context of the Belt and Road Initiative,the rural agricultural economy is facing new development opportunities and challenges,but there are also some problems.In the new period,we should accelerate the innovative development of rural agricultural economy by promoting market-oriented reform,strengthening scientific and technological innovation,optimizing the industrial structure,deepening international cooperation and other measures.The Belt and Road Initiative provides an important opportunity for the innovation of rural agricultural economic management.Rural agricultural economic management should be actively integrated into the Belt and Road construction to improve the level of rural agricultural economic management.[Conclusions]This study provides useful exploration and reference for the innovation of rural agricultural economic management models,which helps to promote the healthy development of rural agricultural economy and achieve the goal of rural revitalization. 展开更多
关键词 The BELT and ROAD initiative RURAL areas Agriculture ECONOMY ADMINISTRATION
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Colorectal cancer’s burden attributable to a diet high in processed meat in the Belt and Road Initiative countries
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作者 Gu Liu Chang-Min Li +5 位作者 Fei Xie Qi-Lai Li Liang-Yan Liao Wen-Jun Jiang Xiao-Pan Li Guan-Ming Lu 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第1期182-196,共15页
BACKGROUND Colorectal cancer(CRC)plays a significant role in morbidity,mortality,and economic cost in the Belt and Road Initiative(“B and R”)countries.In addition,these countries have a substantial consumption of pr... BACKGROUND Colorectal cancer(CRC)plays a significant role in morbidity,mortality,and economic cost in the Belt and Road Initiative(“B and R”)countries.In addition,these countries have a substantial consumption of processed meat.However,the burden and trend of CRC in relation to the consumption of a diet high in processed meat(DHPM-CRC)in these“B and R”countries remain unknown.AIM To analyze the burden and trend of DHPM-CRC in the“B and R”countries from 1990 to 2019.METHODS We used the 2019 Global Burden of Disease Study to collate information regarding the burden of DHPM-CRC.Numbers and age-standardized rates(ASRs)of deaths along with the disability-adjusted life years(DALYs)were determined among the“B and R”countries in 1990 and 2019.Using joinpoint regression analysis,the average annual percent change(AAPC)was used to analyze the temporal trends of age-standardized DALYs rate(ASDALR)from 1990 to 2019 and in the final decade(2010–2019).RESULTS We found geographical differences in the burden of DHPM-CRC among“B and R”countries,with the three highest-ranking countries being the Russian Federation,China,and Ukraine in 1990,and China,the Russian Federation,and Poland in 2019.The burden of DHPM-CRC generally increased in most member countries from 1990 to 2019(all P<0.05).The absolute number of deaths and DALYs in DHPM-CRC were 3151.15[95%uncertainty interval(UI)665.74-5696.64]and 83249.31(95%UI 15628.64-151956.31)in China in 2019.However,the number of deaths(2627.57-2528.51)and DALYs(65867.39-55378.65)for DHPM-CRC in the Russian Federation has declined.The fastest increase in ASDALR for DHPM-CRC was observed in Vietnam,Southeast Asia,with an AAPC value of 3.90%[95%confidence interval(CI):3.63%-4.16%],whereas the fastest decline was observed in Kyrgyzstan,Central Asia,with an AAPC value of-2.05%(95%CI:-2.37%to-1.73%).A substantial upward trend in ASR of mortality,years lived with disability,years of life lost,and DALYs from DHPM-CRC changes in 1990-2019 and the final decade(2010-2019)for most Maritime Silk Route members in East Asia,South Asia,Southeast Asia,North Africa,and the Middle East,as well as Central Europe,while those of the most Land Silk Route members in Central Asia and Eastern Europe have decreased markedly(all P<0.05).The ASDALR for DHPM-CRC increased more in males than in females(all P<0.05).For those aged 50-74 years,the ASDALR for DHPM-CRC in 40 members exhibited an increasing trend,except for 20 members,including 7 members in Central Asia,Maldives,and 12 high or high-middle social development index(SDI)members in other regions(all P<0.05).CONCLUSION The burden of DHPM-CRC varies substantially across“B and R”countries and threatens public health.Relevant evidence-based policies and interventions tailored to the different trends of countries in SDIs or Silk Routes should be adopted to reduce the future burden of CRC in“B and R”countries via extensive collaboration. 展开更多
关键词 Belt and Road initiative countries Colorectal cancer Burden of disease Dietary risk factors Processed meat Disability-adjusted life years Trend analysis
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Preliminary Study on Overseas Applicability of Chinese Architectural Design Standards:Taking China-Aided Construction Projects in Asia Since the Belt and Road Initiative as Examples
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作者 Wei Chang Yifan Gao +1 位作者 Xiaofeng Guo Yingjie Zhu 《Journal of Architectural Research and Development》 2024年第3期1-7,共7页
This research takes China-aided construction projects in Asia since the Belt and Road Initiative as examples to explore the applicability of Chinese architectural design standards in other Asian countries.So far,the s... This research takes China-aided construction projects in Asia since the Belt and Road Initiative as examples to explore the applicability of Chinese architectural design standards in other Asian countries.So far,the standards demonstrated the highest applicability in South Asia is the best followed by Southeast Asia.Chinese architectural design standards for educational buildings showed the highest applicability,followed by office,medical,and sports buildings.This study puts forward some strategies to improve the applicability of Chinese architectural design standards.These strategies include integrating regionalism and local cultural traditions,optimizing energy efficiency,and aligning designs with local usage habits.This study serves as a reference for similar projects in the future. 展开更多
关键词 Chinese building design standards Overseas applicability China-aided construction Belt and Road initiative
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Optimizing University Faculty Teams: Addressing the Talent Mobility Challenges in the Context of “Double First-Class” Initiative
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作者 Shanhong Zhang Yuming Song Hongbo Shi 《教育研究前沿(中英文版)》 2024年第3期1-7,共7页
With the advancement of the“Double First-Class”initiative,universities are increasingly focusing on attracting top-tier talent to enhance faculty quality and strengthen academic disciplines.The blind competition for... With the advancement of the“Double First-Class”initiative,universities are increasingly focusing on attracting top-tier talent to enhance faculty quality and strengthen academic disciplines.The blind competition for high-end talent among universities reflects an overshadowing of academic values by economic considerations,neglecting the growth patterns of top talent and the development laws of higher education.This study investigates and reflects on the real-world challenges of faculty mobility in universities,aiming to provide effective guidance for managing university faculty teams. 展开更多
关键词 “Double First-Class”initiative Higher Education Institutions Faculty Teams Talent Cultivation
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Discourse Analysis of the Belt and Road Initiative From the Perspective of Central Asian Countries: A Case Study of the Republic of Kazakhstan
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作者 CHEN Jia LIU Shumin +1 位作者 FU Da’an SHAO Di 《Journalism and Mass Communication》 2024年第2期96-100,共5页
This study employs Norman Fairclough’s Critical Discourse Analysis(CDA)three-dimensional model,using the Republic of Kazakhstan as a case study,to delve into the discourse construction of China’s Belt and Road Initi... This study employs Norman Fairclough’s Critical Discourse Analysis(CDA)three-dimensional model,using the Republic of Kazakhstan as a case study,to delve into the discourse construction of China’s Belt and Road Initiative(BRI)in Central Asian countries.Through detailed analysis of policy documents,media reports,and public discussions in Central Asian countries,this paper reveals how the BRI constructs specific social practices,discourse events,and textual meanings within these nations.The findings indicate that through this global development strategy,China has not only strengthened its economic ties with Central Asian countries but has also exerted profound influences on political,cultural,and social levels. 展开更多
关键词 Belt and Road initiative Central Asian countries discourse analysis Norman Fairclough’s three-dimensional model
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Indian Solar Panel Initiatives in Reducing Carbon Dioxide Emissions
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作者 Manoj K. Khanna Sarika Malik +1 位作者 Hemant Kumar   Suruchi 《Energy and Power Engineering》 CAS 2023年第4期191-203,共13页
Environmental degradation and the emission of greenhouse gases particularly carbon dioxide have expanded problems to human wellness and to the atmosphere. The second-most populated country in the globe, India, is amon... Environmental degradation and the emission of greenhouse gases particularly carbon dioxide have expanded problems to human wellness and to the atmosphere. The second-most populated country in the globe, India, is among the primary users of conventional resources, which leads to global warming. The growth rate is anticipated to raise more before 2050, which will cause the brisk industrial expansion and rising energy demand to both increases. In order to reduce carbon emissions and meet energy requirements, many countries use alternate usage of renewable energy particularly solar energy. In this review we aim to study solar panel schemes initiated by India, mainly focusing on National Solar Mission. This study also reviews the present solar installed capacity, solar panel scheme 2022, and initiatives and outcomes of solar panels in residences and offices. This study reviewed that by using solar panel resources, the (MNRE) Ministry of New and Renewable Energy hopes to help the Indian Government reach its purpose of 100 GW solar installed capacity by end of 2022. Despite having an amazing 40 GW of solar power installed capacity till December 2021, India is still far from reaching its own goal of 100 GW by March 2023 as per NSM. In essence, this means that India will need to change a few of its ongoing plans further. 展开更多
关键词 Renewable Energy Solar Panel Carbon Dioxide Emission Schemes of the Indian Government initiativeS
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Construction of University Librarian Team in the Context of Double First-Class Initiative
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作者 Jin MENG 《Asian Agricultural Research》 2023年第6期51-55,共5页
Data services,knowledge services,and information services are the core service elements of university libraries in the context of the Double First-Class Initiative.Combined with the current situation of insufficient o... Data services,knowledge services,and information services are the core service elements of university libraries in the context of the Double First-Class Initiative.Combined with the current situation of insufficient overall service capacity of libraries,this paper proposed strategies and implementation paths for optimizing the service system from three aspects:the construction of the professional qualification system for librarians,the establishment of post institutions,and the construction of library culture.Long-term path:putting library human resource management into the legal track,taking the lead in local legislation,and promoting the construction of library legislation and professional qualification certification system;optimizing the personnel system,implementing hierarchical management and classified assessment for professional librarians and auxiliary librarians.Short-term path:intensive post allocation,namely,assigning the core strength in the core post,and tackling the temporary major work combining multiple forces in the form of a"working group";building an open knowledge service ecosystem,accelerate the cross-border integration of libraries and other organizations,and striving to build the core competitiveness of libraries. 展开更多
关键词 UNIVERSITY Double First-Class initiative Construction of university librarian team
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Integration of the Historical Initiative Spirit into the Ideological and Political Course of Colleges and Universities : Value Implication, Main Contents and Practical Dimension
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作者 Dongming LI Ying WANG 《Asian Agricultural Research》 2023年第9期51-55,共5页
The value implication,main contents and practical dimension of integrating the historical initiative spirit into the ideological and political course of colleges and universities were studied.From the perspective of v... The value implication,main contents and practical dimension of integrating the historical initiative spirit into the ideological and political course of colleges and universities were studied.From the perspective of value implication,integrating the historical initiative spirit into the ideological and political course of colleges and universities is helpful to promoting the integrity and innovation of the ideological and political course in colleges and universities,deepening the historical cognition of students and building the cornerstone of students belief.From the perspective of main contents,teachers of ideological and political course should clarify the theoretical connotation of the historical initiative spirit,give a thorough exposition of the generation logic of the historical initiative spirit,and explain The Times value of the historical initiative spirit lively.From the perspective of practical dimension,it is necessary to give full play to the educational function of the historical initiative spirit by enriching the content of curriculum teaching,innovating the ways and methods of education and teaching,integrating theory and practice,and online and offline interaction. 展开更多
关键词 Historical initiative spirit Ideological and political course of colleges and universities Educational function
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马克思、恩格斯关于历史主动精神的论述和现实启示 被引量:2
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作者 刘建军 耶旭妍 《南昌大学学报(人文社会科学版)》 CSSCI 北大核心 2024年第2期38-47,共10页
历史主动精神植根于唯物史观,是指无产阶级在遵循历史规律的前提下主动创造历史的精神品质。这种精神在重大历史关头表现得更为鲜明,其本质是人的主观能动性的发挥。马克思、恩格斯关于历史主动的论述使用了“历史主动性”“主动精神”... 历史主动精神植根于唯物史观,是指无产阶级在遵循历史规律的前提下主动创造历史的精神品质。这种精神在重大历史关头表现得更为鲜明,其本质是人的主观能动性的发挥。马克思、恩格斯关于历史主动的论述使用了“历史主动性”“主动精神”“历史首创精神”等核心概念。围绕这些核心概念,马克思、恩格斯以人民群众、无产阶级和无产阶级政党为主体展开了关于历史主动精神的论述。其内涵主要包括主动斗争精神、主动创造精神和主动引领精神。马克思、恩格斯关于历史主动精神的论述为马克思主义的发展与传播奠定了基础,也推动了共产主义运动和中国革命的发展。探究马克思、恩格斯关于历史主动精神的论述有助于在新征程中彰显中国共产党人的马克思主义立场,激发更为主动的精神力量。 展开更多
关键词 马克思 恩格斯 历史主动精神 主观能动性 无产阶级政党
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对外直接投资与企业ESG表现——基于“一带一路”倡议的经验证据 被引量:1
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作者 刘晓丹 苏二豆 衣长军 《中南财经政法大学学报》 CSSCI 北大核心 2024年第3期124-135,共12页
本文运用中国沪深A股制造业上市公司2010—2020年数据,以“一带一路”倡议为准自然实验,探讨企业OFDI对ESG的影响及ESG调整动机。研究发现,中国企业通过参与“一带一路”倡议进行OFDI显著提高了ESG水平,尤其是环境维度的ESG。随着OFDI... 本文运用中国沪深A股制造业上市公司2010—2020年数据,以“一带一路”倡议为准自然实验,探讨企业OFDI对ESG的影响及ESG调整动机。研究发现,中国企业通过参与“一带一路”倡议进行OFDI显著提高了ESG水平,尤其是环境维度的ESG。随着OFDI深入推进,企业ESG的改善效应逐步增强。OFDI更有助于提升国际化经验不足企业和投资到可持续发展目标较高东道国企业的ESG水平。此外,当面临严格的制度约束时,企业OFDI对ESG的提升效应更大,且制度约束主要作用于环境维度的ESG;若企业高阶资源较为丰富,则其ESG改善幅度更大,且主要表现为社会和治理维度的ESG改善效应。本文的研究丰富了我国企业对“一带一路”沿线国家直接投资的ESG改善效应研究,并为推动我国企业ESG建设提供了理论支持和经验证据。 展开更多
关键词 对外直接投资 “一带一路”倡议 ESG
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初期雨水调蓄池单位面积调蓄深度数值模拟 被引量:1
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作者 周毅 周云笛 《水电能源科学》 北大核心 2024年第4期43-46,共4页
单位面积调蓄深度决定了初雨调蓄池的设计容积和截污效果,但仅仅根据规范的推荐取值缺少对后果的量化判断。忽略管道中的沉积和冲刷,分别以单子汇水区和多子汇水区排水系统为例,针对不同下垫面特征和降雨特征,在SWMM模型中进行多降雨条... 单位面积调蓄深度决定了初雨调蓄池的设计容积和截污效果,但仅仅根据规范的推荐取值缺少对后果的量化判断。忽略管道中的沉积和冲刷,分别以单子汇水区和多子汇水区排水系统为例,针对不同下垫面特征和降雨特征,在SWMM模型中进行多降雨条件模拟,计算得到产流和悬浮固体(SS)的冲刷情况。结果表明,单子汇水区单次降雨初期冲刷主要受污染物积累程度、初雨峰值雨强和初雨总量控制,对多场降雨的初雨SS控制率均很高;多子汇水区系统不同场次降雨SS削减率可能有明显差异,SS控制率随调蓄深度增加而增加且差异减小,单位面积调蓄深度取2 mm时SS控制率已达较高水平,但4 mm以上时SS控制率增速明显减慢;初期雨水调蓄池是否达到了污染控制目标,不应只看是否位于系统的上游,也不只限于根据技术规范的推荐取值,需通过模型计算判断。 展开更多
关键词 初期雨水 初期冲刷 径流污染 初期雨水调蓄池 单位面积调蓄深度
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“三大倡议”与新时期中国的中亚外交 被引量:1
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作者 曾向红 王子寒 《国际展望》 CSSCI 北大核心 2024年第1期75-96,160,共23页
自2021年以来,习近平主席相继提出了全球发展倡议、全球安全倡议和全球文明倡议三大全球性倡议。“三大倡议”不仅为解决全球性问题提供了重要方案,而且为中国的中亚外交提供了理论支持和战略引领。中国同中亚五国是命运与共的好邻居、... 自2021年以来,习近平主席相继提出了全球发展倡议、全球安全倡议和全球文明倡议三大全球性倡议。“三大倡议”不仅为解决全球性问题提供了重要方案,而且为中国的中亚外交提供了理论支持和战略引领。中国同中亚五国是命运与共的好邻居、好朋友、好伙伴、好兄弟。三十多年来,中国的中亚外交取得了令人瞩目的巨大成就。当前,中国应以全球发展倡议为引领,推动中国与中亚国家实现共同发展;以全球安全倡议为引领,助力中国与中亚国家实现共同安全;以全球文明倡议为引领,促进中国与中亚国家实现民心相通与文明互鉴,进而促进中国与中亚国家走上更加稳定和友好的发展轨道,并保障中国—中亚命运共同体的构建取得更多切实成效。 展开更多
关键词 全球发展倡议 全球安全倡议 全球文明倡议 中国中亚外交
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基于IIFAR微信护理结合聚焦干预在急性心肌梗死PCI术后患者中的应用 被引量:2
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作者 蔡丹霞 郭燕 +1 位作者 赵毅 陈士芳 《海南医学》 CAS 2024年第12期1803-1808,共6页
目的探讨基于初始核对-信息交流-准确性核对-反应(IIFAR)微信护理结合聚焦干预在急性心肌梗死(AMI)经皮冠脉介入治疗(PCI)后的应用效果。方法选取2023年1~4月河南科技大学第一附属医院收治的102例AMI患者纳入研究,按随机数表法分为对照... 目的探讨基于初始核对-信息交流-准确性核对-反应(IIFAR)微信护理结合聚焦干预在急性心肌梗死(AMI)经皮冠脉介入治疗(PCI)后的应用效果。方法选取2023年1~4月河南科技大学第一附属医院收治的102例AMI患者纳入研究,按随机数表法分为对照组和观察组各51例。两组患者均接受PCI术治疗,对照组采取常规干预,观察组于此基础上采取基于IIFAR微信护理与聚焦干预相结合的管理模式,干预时间共6个月。干预前和干预2个月、6个月后,比较两组患者的冠心病自我管理行为量表(CSMS)评分、运动自我效能量表(SEE)评分,术后24 h内和干预2个月、6个月后,比较两组患者的心功能[左心室射血分数(LVEF)、左心室舒张末期内径(LVEDD)、左心房内径(LAD)]和运动能力[无氧阈耗氧量(VO2AT)、峰值耗氧量(VO2peak)、6 min步行距离(6MWD)],并比较两组患者的主要不良心血管事件(MACE)发生情况。结果干预2个月和6个月后,两组患者的CSMS和SEE评分均呈逐渐升高趋势,且观察组患者的CSMS、SEE评分明显高于对照组,差异均有统计学意义(P<0.05);干预2个月和6个月后,两组患者的LVEF均呈逐渐升高趋势,而LVEDD、LAD均呈逐渐降低趋势,且观察组患者的LVEF明显高于对照组,LVEDD、LAD明显低于对照组,差异均有统计学意义(P<0.05);干预2个月和6个月后,两组患者的VO2AT、VO2peak、6 MWD均呈逐渐升高趋势,且观察组患者的VO2AT、VO2peak、6 MWD明显高于对照组,差异均有统计学意义(P<0.05);观察组患者的MACE总发生率为5.88%,略低于对照组的13.73%,但差异无统计学意义(P>0.05)。结论基于IIFAR微信护理结合聚焦干预有助于提高AMI PCI术后患者自我效能与自我管理能力,恢复心功能,提高运动能力。 展开更多
关键词 心肌梗死 初始核对-信息交流-准确性核对-反应 聚焦干预 心功能 运动能力 自我管理能力 自我效能 主要不良心血管事件
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基于离散元法的类岩石材料水力压裂裂缝扩展规律 被引量:1
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作者 冯国瑞 樊一江 +7 位作者 王朋飞 郭军 高瑞 文晓泽 张鹏飞 朱林俊 钱瑞鹏 张洁 《煤炭学报》 EI CAS CSCD 北大核心 2024年第5期2231-2246,共16页
水力压裂是煤矿井下卸压的重要技术手段,更好地理解裂缝扩展机理对煤层安全开采具有重要意义。为深入探究水力裂缝扩展规律,针对实验室常用的类岩石试件,利用颗粒离散元数值模拟软件MatDEM,建立了二维水力压裂数值模型,开展了不同注液... 水力压裂是煤矿井下卸压的重要技术手段,更好地理解裂缝扩展机理对煤层安全开采具有重要意义。为深入探究水力裂缝扩展规律,针对实验室常用的类岩石试件,利用颗粒离散元数值模拟软件MatDEM,建立了二维水力压裂数值模型,开展了不同注液压力增量的水力压裂试验。试验研究了注液压力增量对水力裂缝扩展的影响,揭示了模型起裂机理,从细观尺度分析了裂隙生成及裂缝扩展规律,并对水力裂缝扩展特性进行了讨论。结果表明:①注液压力增量对模型起裂压力与起裂时间变化趋势的影响相反。起裂压力随注液压力增量变大,其增长趋势不断变缓,并逐渐趋近于5.6 MPa。起裂时间随注液压力增量变大不断减小,其减小趋势同样逐渐减缓。②累计裂隙数目随时间呈指数型增长,将水力压裂过程分为4个阶段(Ⅰ~Ⅳ):无裂隙阶段、裂隙缓慢增长阶段、裂隙稳定增长阶段和裂隙急速增长阶段,分别对应模型起裂前、模型起裂后裂缝形成前、主裂缝扩展以及次级裂缝扩展过程。随注液压力增量变大,第Ⅰ、Ⅱ和Ⅲ阶段时长不断减小,第Ⅳ阶段时长呈波动式增长。各阶段裂隙数目关系为第Ⅳ阶段最多,第Ⅲ阶段次之、第Ⅱ阶段最少。③随注液压力增量变大,次级裂缝数目由8条增至16条,裂缝增长速度在第Ⅲ阶段以前逐渐减慢,进入第Ⅳ阶段后不断增快。注液压力增量由0.03 MPa增大至0.70 MPa,裂缝最终长度增大1.79倍。④模型内部能量随注液压力增量的变大而增加,且能量输入速度逐渐变快。模型起裂后,高压水在裂缝尖端形成应力集中,促使裂缝继续扩展延伸。较高注液压力增量下,裂缝扩展速度变快,颗粒位移量由压裂孔至模型外侧逐渐减小。注液压力增量的变大会使次级裂缝形成位置向压裂孔靠近,对主裂缝的形成及扩展起抑制作用,而对次级裂缝的形成及扩展起促进作用,裂隙类型均为张拉裂隙。 展开更多
关键词 水力压裂 MatDEM 模型起裂 裂隙演化 裂缝扩展 细观
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恒定市场份额三层次两极均化模型及其应用——我国对“一带一路”沿线国家农产品出口增长的驱动因素及其贡献率分析 被引量:2
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作者 葛明 贾怀勤 赵素萍 《统计研究》 CSSCI 北大核心 2024年第2期3-14,共12页
恒定市场份额(CMS)三层次两极均化模型将微观层面的商品价格、数量、种类,中观层面的国别、产业结构,与宏观层面的市场份额和需求规模有机结合起来,系统刻画出口波动的直接因素。基于该模型,本文从总体、动态、区域、产业4个维度逐层解... 恒定市场份额(CMS)三层次两极均化模型将微观层面的商品价格、数量、种类,中观层面的国别、产业结构,与宏观层面的市场份额和需求规模有机结合起来,系统刻画出口波动的直接因素。基于该模型,本文从总体、动态、区域、产业4个维度逐层解析2002—2021年我国对“一带一路”沿线国家农产品出口增长的驱动因素及其贡献率。结果表明,进口需求效应占据主导地位,需求数量和价格水平增长均有显著贡献,虽然出口竞争力效应总体表现不佳,但是品类竞争力和质量竞争力均小幅改善。“一带一路”倡议提出后,出口竞争力效应显著增长,特别是数量竞争力效应大幅改善。研究还表明,上述效应在不同产业和区域既存在共性特征,也具有一定程度差异性。相对于CMS两层次分解框架,CMS三层次两极均化模型的研究内容更加丰富,经济学含义更加清晰,政策启示更加明确,具有更广泛的应用价值。 展开更多
关键词 CMS模型 三元边际 国际竞争力 “一带一路”倡议 农产品
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环境产品贸易网络的结构特征及演进机制——基于共建“一带一路”国家的实证 被引量:3
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作者 贺胜兵 姜思琦 周华蓉 《中国人口·资源与环境》 CSSCI CSCD 北大核心 2024年第2期81-93,共13页
加强环境产品贸易合作是推进区域绿色发展的重要途径。该研究基于社会网络分析视角,利用2000—2020年共建“一带一路”国家的54种环境产品贸易数据构建环境产品贸易网络,采用时间指数随机图模型(TERGM),探究区域环境产品贸易网络结构特... 加强环境产品贸易合作是推进区域绿色发展的重要途径。该研究基于社会网络分析视角,利用2000—2020年共建“一带一路”国家的54种环境产品贸易数据构建环境产品贸易网络,采用时间指数随机图模型(TERGM),探究区域环境产品贸易网络结构特征及其演化机制。研究发现:①样本区间内,环境产品贸易网络密度和平均聚类系数总体呈上升趋势,平均路径长度缩减,网络直径较短,但是受疫情影响,2020年网络特征指标数值明显下降。②意大利、中国、韩国和新加坡的点出度与点入度排名位于前列,在贸易网络中发挥“桥梁”与“枢纽”作用。中国后来居上,成为点出度与点入度最高的国家,引领区域环境产品贸易发展。③欧洲与亚洲是环境产品贸易网络中贸易合作最密集的两个地区,非洲、拉丁美洲地区的共建“一带一路”国家具有较少的环境产品贸易关系,且源自板块外进口关系数显著多于出口关系数。④TERGM分析表明,环境产品贸易网络存在显著的互惠性、连通性、稳定性和变异性。工业增加值、经济自由度和绿色创新存在发送效应和接收效应,人均GDP、环境规制存在发送效应。地理距离不利于形成环境产品贸易合作。⑤环境保护型产品、可再生能源产品、环境监测分析与评价设备贸易网络的形成和演化具有异质性。基于该结论,从引领区域绿色低碳发展、因地制宜深化环保产业合作、加快环保产业转型升级等方面,提出了深化和拓展“一带一路”环境产品贸易关系的对策建议。 展开更多
关键词 “一带一路”倡议 环境产品贸易网络 TERGM 贸易合作
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“一带一路”倡议下中国企业对外投资的增长路径 被引量:2
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作者 刘春艳 赵军 《国际商务研究》 CSSCI 北大核心 2024年第1期29-41,共13页
本文使用中国企业对外投资数据,将对外投资总量分解为集约边际与扩展边际,以“一带一路”倡议为准自然实验,解释了中国企业在沿线国家投资增长的路径。研究发现:集约边际和扩展边际均是“一带一路”倡议促进中国企业在沿线国家投资总量... 本文使用中国企业对外投资数据,将对外投资总量分解为集约边际与扩展边际,以“一带一路”倡议为准自然实验,解释了中国企业在沿线国家投资增长的路径。研究发现:集约边际和扩展边际均是“一带一路”倡议促进中国企业在沿线国家投资总量增长的路径;从投资方式看,跨国并购的集约边际增长强于绿地投资,扩展边际增长弱于绿地投资;从投资方向看,对顺梯度国家的投资二元边际增长具有显著正向作用,但对逆梯度国家作用相反;从行业类别看,交通与能源行业的对外投资二元边际增长的提高作用更优。机制检验表明,增强中国企业对外投资增长的稳定性应进一步提高“一带一路”倡议互联互通建设对扩展边际的促进作用。 展开更多
关键词 “一带一路”倡议 对外直接投资 集约边际 扩展边际 互联互通
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