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Carbon Footprint in Waste Sector of Hydropower Plant: A Case Study of Nam Theun 2 Hydropower Plant
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作者 Souttiphong Keovongsa Keophousone Phonhalath Sengthavy Phommixay 《American Journal of Climate Change》 2024年第2期209-229,共21页
While hydropower is generally considered a clean energy source, it is important to recognize that their waste can still contribute to greenhouse gas emissions (GHG). The purpose of this study is to assess the carbon f... While hydropower is generally considered a clean energy source, it is important to recognize that their waste can still contribute to greenhouse gas emissions (GHG). The purpose of this study is to assess the carbon footprint associated with the waste sector throughout the operational phase of the Nam Theun 2 hydropower plant in Laos. Understanding the environmental impact of the waste sector is crucial for ensuring the plant’s sustainability. This study utilizes the theoretical estimation method recommended in the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories, as well as the Requirements for Specification with guidance at the organization level for quantification and reporting of GHG emissions and removals. We emphasize the significance of implementing sustainable waste management practices to reduce GHG emissions and minimize the environmental impact of hydropower operations. By conducting a comprehensive analysis, this paper also provides insights into the environmental implications of waste management in hydropower plants and identifies strategies to mitigate the carbon footprint in the waste sector. The findings contribute to a better understanding of the environmental sustainability of hydropower plants and provide valuable guidance for policymakers, energy producers, and environmental practitioners involved in hydropower plant design and operation. 展开更多
关键词 Waste sector Carbon Footprint Climate Change Hydropower Plant
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2P3FL:A Novel Approach for Privacy Preserving in Financial Sectors Using Flower Federated Learning
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作者 Sandeep Dasari Rajesh Kaluri 《Computer Modeling in Engineering & Sciences》 SCIE EI 2024年第8期2035-2051,共17页
The increasing data pool in finance sectors forces machine learning(ML)to step into new complications.Banking data has significant financial implications and is confidential.Combining users data from several organizat... The increasing data pool in finance sectors forces machine learning(ML)to step into new complications.Banking data has significant financial implications and is confidential.Combining users data from several organizations for various banking services may result in various intrusions and privacy leakages.As a result,this study employs federated learning(FL)using a flower paradigm to preserve each organization’s privacy while collaborating to build a robust shared global model.However,diverse data distributions in the collaborative training process might result in inadequate model learning and a lack of privacy.To address this issue,the present paper proposes the imple-mentation of Federated Averaging(FedAvg)and Federated Proximal(FedProx)methods in the flower framework,which take advantage of the data locality while training and guaranteeing global convergence.Resultantly improves the privacy of the local models.This analysis used the credit card and Canadian Institute for Cybersecurity Intrusion Detection Evaluation(CICIDS)datasets.Precision,recall,and accuracy as performance indicators to show the efficacy of the proposed strategy using FedAvg and FedProx.The experimental findings suggest that the proposed approach helps to safely use banking data from diverse sources to enhance customer banking services by obtaining accuracy of 99.55%and 83.72%for FedAvg and 99.57%,and 84.63%for FedProx. 展开更多
关键词 Federated learning FedAvg FedProx flower framework privacy preservation financial sectors
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A Multi-Token Sector Antenna Neighbor Discovery Protocol for Directional Ad Hoc Networks
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作者 Zhang Hang Li Bo +2 位作者 Yan Zhongjiang Yang Mao Li Xinru 《China Communications》 SCIE CSCD 2024年第7期149-168,共20页
In this paper,we propose a Multi-token Sector Antenna Neighbor Discovery(M-SAND)protocol to enhance the efficiency of neighbor discovery in asynchronous directional ad hoc networks.The central concept of our work invo... In this paper,we propose a Multi-token Sector Antenna Neighbor Discovery(M-SAND)protocol to enhance the efficiency of neighbor discovery in asynchronous directional ad hoc networks.The central concept of our work involves maintaining multiple tokens across the network.To prevent mutual interference among multi-token holders,we introduce the time and space non-interference theorems.Furthermore,we propose a master-slave strategy between tokens.When the master token holder(MTH)performs the neighbor discovery,it decides which 1-hop neighbor is the next MTH and which 2-hop neighbors can be the new slave token holders(STHs).Using this approach,the MTH and multiple STHs can simultaneously discover their neighbors without causing interference with each other.Building on this foundation,we provide a comprehensive procedure for the M-SAND protocol.We also conduct theoretical analyses on the maximum number of STHs and the lower bound of multi-token generation probability.Finally,simulation results demonstrate the time efficiency of the M-SAND protocol.When compared to the QSAND protocol,which uses only one token,the total neighbor discovery time is reduced by 28% when 6beams and 112 nodes are employed. 展开更多
关键词 multi-token neighbor discovery SAND protocol sector antenna ad hoc network
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An Investigation into Green Total Factor Productivity in China's Carbon-Intensive Sectors and Its Influencing Factors
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作者 Pu Lijuan Zhu Shuaihui 《Contemporary Social Sciences》 2024年第3期64-76,共13页
This paper uses an SBM-GML index model to assess Green Total Factor Productivity(GTFP)in China's carbon-intensive sectors and conducts an empirical investigation into which factors influence GTFP in these sectors.... This paper uses an SBM-GML index model to assess Green Total Factor Productivity(GTFP)in China's carbon-intensive sectors and conducts an empirical investigation into which factors influence GTFP in these sectors.The GTFP in the carbon-intensive sectors experienced a decline between 2006 and 2011,followed by an upward trend beginning in 2012.Technological progress was the primary driver of GTFP growth,while business size was also a notable contributor.Irrational energy structures negatively influenced the high-quality development of the carbon-intensive sectors,and environmental regulation and foreign direct investment(FDI)have not yet significantly impacted GTFP.Based on these findings,this paper suggests that the carbon-intensive sectors should expedite their green transitions by focusing on system improvement,technological innovations,energy revolutions,and high-level opening up. 展开更多
关键词 carbon-intensive sectors GTFP SBM-GML index model
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Impacts of forest plantation programs on sectoral CO_(2) emissions regionally in New Zealand
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作者 Saeed Solaymani Andrew Dunningham 《Journal of Forestry Research》 SCIE EI CAS CSCD 2024年第6期13-28,共16页
Investing in projects that support environmental benefits,such as tree harvesting,has the potential to reduce air pollution levels in the atmosphere in the future.However,this kind of investment may increase the curre... Investing in projects that support environmental benefits,such as tree harvesting,has the potential to reduce air pollution levels in the atmosphere in the future.However,this kind of investment may increase the current level of emissions.Therefore,it is necessary to estimate how much the policy affects the current level of CO_(2) emissions.This makes sure the policy doesn’t increase the level of CO_(2) emis-sions.This study aims to analyze the effect of the One Bil-lion Trees program on CO_(2) emissions in New Zealand by employing the 2020 input–output table analysis.This inves-tigation examines the direct and indirect effects of policy on both the demand and supply sides across six regions of New Zealand.The results of this study for the first year of plantation suggest that the policy increases the level of CO_(2) emissions in all regions,especially in the Waikato region.The direct and indirect impact of the policy leads to 64 kt of CO_(2) emissions on the demand side and 270 kt of CO_(2) emis-sions on the supply side.These lead to 0.19 and 0.74%of total CO_(2) emissions being attributed to investment shocks.Continuing the policy is recommended,as it has a low effect on CO_(2) emissions.However,it is crucial to prioritize the use of low-carbon machinery that uses fossil fuels during the plantation process. 展开更多
关键词 Regional input–output analysis Forest investment program sectoral CO_(2) emissions Environmental policies Supply-side policy Demand-side policy
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An Assessment on the Impact of Technological Addiction on Workplace Productivity: Case of the Public Sector in Zimbabwe
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作者 Nelson Matanana Prosper Tafadzwa Denhere +3 位作者 David Chibhoyi Allen Mutumwa Sithole Morgen Noah Ariel Mutongoreni 《World Journal of Engineering and Technology》 2024年第3期635-650,共16页
With the increasing integration of technology in modern workplaces, concerns have emerged regarding the addictive nature of technology and its potential consequences on employee productivity. This research aims to inv... With the increasing integration of technology in modern workplaces, concerns have emerged regarding the addictive nature of technology and its potential consequences on employee productivity. This research aims to investigate the impact of technological addiction on workplace productivity within the public sector of Zimbabwe. The study employed a mixed-methods approach, combining surveys, interviews, and a case study analysis, to examine the prevalence and effects of technological addiction in affecting productivity in the public sector of Zimbabwe. The findings indicate that excessive use of social media, and other digital distractions is a growing concern in the public sector, leading to decreased focus, missed deadlines, and strained teamwork. Factors such as unrestricted internet access, lack of clear usage policies, and inadequate self-regulation contribute to the problem The research outcomes also highlight the need for awareness and interventions to address social media addiction in the workplace, promote healthier technology use, and uphold productivity and employee well-being. 展开更多
关键词 Technology Addiction Workplace Productivity TECHNOLOGY Public sector Zimbabwe
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An Assessment of Procurement Risks Management Systems in the Public Sector
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作者 Atoapem Frimpong Barimah Joyce-Jael Amoafoa Mensah 《Chinese Business Review》 2024年第2期76-86,共11页
Risk management in public procurement is a critical aspect that needs to be addressed in the public sector.Several studies have been conducted to understand the challenges and factors influencing risk management in pu... Risk management in public procurement is a critical aspect that needs to be addressed in the public sector.Several studies have been conducted to understand the challenges and factors influencing risk management in public procurement.These studies have explored the importance of risk management principles,the role of political influence,and the need for effective risk assessment and anticipation.The research has also highlighted the need for specific risk management mechanisms and tools to be implemented in public procurement processes.Risk management reforms in the public sector are essential but often circumvented due to assorted reasons,such as political influence and the emergence of new risks.The research investigation employs a quantitative research design.A total of 380 questionnaires were recovered from respondents.The study showed that the public sector has a procurement risk management system that is effective,but there may be some areas for improvement in the prequalification process,onboarding process,and support provided to newly onboarded suppliers.Additionally,the public sector used some strategies to mitigate and control contract risks during the procurement process,but there were some areas for improvement in the review and lessons learned process,risk mitigation measures,contract monitoring and performance evaluation mechanisms,and communication and documentation process.Finally,the results suggest that there were constraints placed on the risk management strategies currently utilized by professionals working in the public sector.These constraints include insufficient support and buy-in from senior management and stakeholders,bureaucratic or administrative hurdles,inadequate policies and regulations,insufficient training and skill development opportunities,and insufficient resources.The study highlights the significance of tackling risk management in the realm of public procurement and offers valuable perspectives on avenues for enhancement,obstacles encountered by practitioners,and the necessity of thorough evaluation and revisions.Through the adoption of the suggestions originating from this study,governmental entities can improve their procurement risk management frameworks and guarantee improved adherence to risk management principles. 展开更多
关键词 public sector public procurement SUPPLIERS risk management STRATEGIES
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The Influence of Information Technology(IT)on Accrual Accounting Adoption:The Case of the Jordanian Public Sector
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作者 Moawiah Awad Alghizzawi Rosnia Masruki 《Journal of Modern Accounting and Auditing》 2024年第2期40-48,共9页
Jordan is one of many countries that intends to reform its public sector by adopting accrual accounting,which is primarily carried out through the International Public Sector Accounting Standards(IPSAS)implementation ... Jordan is one of many countries that intends to reform its public sector by adopting accrual accounting,which is primarily carried out through the International Public Sector Accounting Standards(IPSAS)implementation plan,scheduled to be completed by 2021.Considering the difficulties of adoption,this process cannot be completed without an appropriate Information Technology(IT)system capable of providing the accounting information required for this reform.Therefore,this study aims to examine the influence of IT on accrual accounting adoption in the Jordanian public sector.The study employed the quantitative survey approach.Based on 331 usable questionnaires,the descriptive findings showed that the use of IT in the Jordanian public sector is relevant to daily accounting transactions in general and to accrual accounting in particular.The regression analysis showed a positive,significant relationship between IT use and accrual accounting practice.The IT specialist should be able to understand the needs of public sector in adopting accrual-based accounting.In line with today’s digitalization age,which integrates advanced technologies and numerous techniques,this study suggests that a combination of accounting and IT experts is a value added to sharpen the competitiveness of public sector reform.This study contributes to the extant literature in public sector,concerning the relationship between IT and accrual accounting adoption in the context of Jordan. 展开更多
关键词 public sector accrual accounting adoption information technology JORDAN
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Evolution of Handicraft Industries in the Textile Sector in Saudi Arabia: A Comprehensive Analysis of Trends and Innovations
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作者 Mona A. Alfawaz 《Journal of Textile Science and Technology》 2024年第3期82-100,共19页
This review explores the evolution of the textile handicraft industry in Saudi Arabia, emphasizing its cultural and economic significance. The study highlights the transition from traditional practices to modern innov... This review explores the evolution of the textile handicraft industry in Saudi Arabia, emphasizing its cultural and economic significance. The study highlights the transition from traditional practices to modern innovations and examines the impact of globalization and technological advancements on the industry. Key innovations are discussed, demonstrating their role in enhancing textile production while preserving cultural heritage. Major challenges, such as competition from industrial textiles and the need for sustainable practices, are identified. Opportunities for growth are explored, including leveraging tourism and international markets to promote Saudi handicrafts. The social and cultural impacts of the sector are underscored, particularly in sustaining community traditions and providing economic opportunities for artisans. Strategic recommendations for supporting and advancing the industry are offered, ensuring its continued relevance and sustainability in a rapidly changing global market. This analysis provides a robust framework for understanding the current state and future potential of Saudi Arabia’s textile handicraft industry. 展开更多
关键词 Handicraft Industries Textile sector Saudi Arabia Cultural Heritage Traditional Crafts Modern Technology Sustainability Global Market Innovation Artisanal Products
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Turkish home textile sector started the last quarter of the year with an increase in exports
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《China Textile》 2024年第6期41-41,共1页
Turkiye maintains its 4th place in the world home textile exports.Home textile manufacturers continue to produce and export despite the negativities such as regional wars,global economic crisis,fluctuations in exchang... Turkiye maintains its 4th place in the world home textile exports.Home textile manufacturers continue to produce and export despite the negativities such as regional wars,global economic crisis,fluctuations in exchange rates and cost increases.In 2024,the home textile sector,whose exports decreased from time to time,started the last quarter of the year with an increase in exports.Turkiye’s home textile exports fell by 8.7%in the JanuaryOctober period of 2024. 展开更多
关键词 QUARTER maintain sector
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Bangladeshi textile and garment sectors defied the global disasters and continued growth
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《China Textile》 2024年第2期20-21,共2页
Bangladeshi textile and garment sectors defied the global challenges over the last five years and continued to grow although the growth momentum was not so strong before the COVID-19 pandemic.Before the start of the p... Bangladeshi textile and garment sectors defied the global challenges over the last five years and continued to grow although the growth momentum was not so strong before the COVID-19 pandemic.Before the start of the pandemic,both the textile and garment sectors were growing at a higher rate because of rising demand from the international clothing retailers and brands because of two main reasons including the trade war between USA and China and competitive prices of locally made garment. 展开更多
关键词 continued GARMENT sector
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Artificial Intelligence Based on Resilient Leadership in the Health Sector-A Secondary Publication
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作者 Elaine Bastidas Tapia 《Proceedings of Business and Economic Studies》 2024年第2期222-233,共12页
At present,it is impossible to deny the existence of artificial intelligence in various areas of social life,understood as the simulation of expert human intelligence from computer processes that involve learning,reas... At present,it is impossible to deny the existence of artificial intelligence in various areas of social life,understood as the simulation of expert human intelligence from computer processes that involve learning,reasoning,and self-correction,its benefits to the medical field,in particular,are innumerable,but their incorporation into health systems has been gradual for many reasons.According to the above,this research analyzed artificial intelligence based on resilient leadership in the health sector,for which qualitative research was carried out with a documentary-bibliographic design with printed and electronic documentary sources with theoretical contributions fromÁvila,Mayer,and Quesada[1],Morgan[2],Villa[3],and Finol[4],among others.It is highlighted that resilient leadership has become a strategic factor in all organizations,since times of uncertainty and changes lead institutions to properly manage the incorporation of technologies specifically AI,achieving in this way that the centers and professionals in the field of health assume the needs of the contexts and the innovations of the same.It is concluded that resilient leadership will allow artificial intelligence in the health sector to generate higher levels of learning and adaptability to the transformations that are necessary,whose resistance would make its application difficult and in the long run it will leave behind professionals who refuse to assume the contributions of these innovative techniques in medical practice. 展开更多
关键词 Artificial intelligence Resilient leadership Health sector
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“语言是生产力”视角下的语言产业元行业研究
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作者 李艳 董潇逸 《云南师范大学学报(哲学社会科学版)》 北大核心 2025年第1期40-52,共13页
面对技术变革与消费需求变化,语言产业如何更好地发挥生产力功能是亟待深入思考的问题。对比各语言行业的产值规模、分析各语言行业在整个语言产业中的占比及其对其他语言行业的辐射带动功能,可以较为清晰地勾勒出9个语言行业间的关系... 面对技术变革与消费需求变化,语言产业如何更好地发挥生产力功能是亟待深入思考的问题。对比各语言行业的产值规模、分析各语言行业在整个语言产业中的占比及其对其他语言行业的辐射带动功能,可以较为清晰地勾勒出9个语言行业间的关系脉络。语言技术行业既是语言产业更好地发挥生产力功能的重要引擎,也是国家科技生产力中至关重要的组成部分。基于语言技术行业的特性与功能,可以将其称为语言产业中的“元行业”。文章旨在围绕语言产业助力新质生产力发展,对作为“元行业”的语言技术行业的产品构成、产值规模、行业功能等进行研究。在此基础上,就如何有效发挥语言技术行业在语言产业以及整个国民经济中的引擎功能进行深入探讨。 展开更多
关键词 语言产业 语言技术行业 语言是生产力 元行业 语言智能
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跨境资本极端流动与中国金融部门系统性风险传染
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作者 王立荣 杨梅 《东北师大学报(哲学社会科学版)》 北大核心 2025年第1期48-60,共13页
随着全球金融一体化程度提高,跨境资本大幅度异常流动越来越频繁,而跨境资本高频次极端流动可能会加剧金融部门脆弱程度、提高系统性金融风险。本文实证检验了涌入、骤停、外逃、回撤四种类型跨境资本极端流动对我国金融部门系统性风险... 随着全球金融一体化程度提高,跨境资本大幅度异常流动越来越频繁,而跨境资本高频次极端流动可能会加剧金融部门脆弱程度、提高系统性金融风险。本文实证检验了涌入、骤停、外逃、回撤四种类型跨境资本极端流动对我国金融部门系统性风险的影响,得出以下结论:(1)我国跨境资本极端流动的持续期和发生频次均较高,说明我国跨境资本流动具有“大进大出”“急进急出”的特征,且跨境资本极端流动类型频繁转换区间与各金融部门系统性风险的局部峰值具有较高的同步性。(2)不同类型跨境资本极端流动对金融部门系统性风险的影响具有异质性。跨境资本涌入和外逃会增加金融部门的系统性风险,且此时保险部门是各金融部门的风险源;跨境资本骤停和回撤会降低金融部门系统性风险,但资本骤停期间,证券部门是风险源,而资本回撤期间,房地产部门则构成了金融系统的风险隐患。 展开更多
关键词 跨境资本极端流动 金融部门系统性风险 溢出网络
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基于Sector/Sphere的气相色谱质谱联用多样本并行对齐算法 被引量:3
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作者 杨辉华 任洪军 +4 位作者 李灵巧 段礼新 郭拓 杜玲玲 漆小泉 《计算机应用》 CSCD 北大核心 2013年第1期215-218,共4页
针对气相色谱质谱联用(GC-MS)数据处理过程复杂且计算量大、处理时间过长而严重拖延实验进度的问题,以多样本保留时间对齐为例,设计了基于分布式平台Sector/Sphere的GC-MS数据处理并行框架,实现了多样本并行对齐算法。首先分布式计算所... 针对气相色谱质谱联用(GC-MS)数据处理过程复杂且计算量大、处理时间过长而严重拖延实验进度的问题,以多样本保留时间对齐为例,设计了基于分布式平台Sector/Sphere的GC-MS数据处理并行框架,实现了多样本并行对齐算法。首先分布式计算所有样本的相似度矩阵;然后依据层次聚类原理将原样本集划分为小样本集,分布式对齐各小样本集内部的样本;最后以各小样本集的平均样本作为对齐依据合并各样本集的对齐结果。实验结果表明:多样本并行对齐算法的错误率为2.9%,由4台PC组成的集群处理大量样本时,最高加速比达到3.29;能够在保证较高正确率的前提下提升计算速度,解决处理时间过长的问题。 展开更多
关键词 sector Sphere平台 分布式计算 并行框架 多样本对齐
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Rattan sector in Hainan Island,China:a case study 被引量:4
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作者 李荣生 尹光天 +1 位作者 杨锦昌 邹文涛 《Journal of Forestry Research》 SCIE CAS CSCD 2007年第2期153-156,共4页
Hainan Island is the biggest supplier of domestic rattan canes in China and is considered the best area to develop rattan plantation in large-scale. This paper discusses the rattan production in Hainan Island on the b... Hainan Island is the biggest supplier of domestic rattan canes in China and is considered the best area to develop rattan plantation in large-scale. This paper discusses the rattan production in Hainan Island on the basis of comprehensively collected information on rattan through interviewing with farmers, middle man, manufacture and official, on-site observation and literatures. The stock of available rattan is more than 25×106kg, but the real production annually is 4×105 kg. The area of rattan plantation established during 2000-2005 was about 10000 hm2, however, they don not produce yet. Four indigenous rattan species (C. Simplicifolius, C. Faberii, C. Tetradactylus, D. margaritae ) and three kinds of exotic canes are mainly utilized in Hainan island. Large quality of canes is treated as timber regulated by government, tax should be paid and a license should be applied from the government if canes are transport out of Hainan Island. The production-to-consumption flow of rattan in Hainan Island was drawn out based on the investigation. Constraints and advantages of the rattan sector in Hainan are identified and recommendations are proposed finally. 展开更多
关键词 Rattan sector Hainan Island Production-to-consumption
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非正式部门(informal sector):旅游研究中不可忽视的领域 被引量:15
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作者 苏静 陆林 《旅游学刊》 CSSCI 北大核心 2009年第1期71-76,共6页
"非正式部门"是一个地区旅游经济的重要组成部分,已经成为国外旅游研究的热点之一,在我国尚没有引起学者们的广泛关注。本文首先介绍了国外在非正式部门概念方面的研究,描述了非正式部门概念的演化过程,总结了国外学者关于非... "非正式部门"是一个地区旅游经济的重要组成部分,已经成为国外旅游研究的热点之一,在我国尚没有引起学者们的广泛关注。本文首先介绍了国外在非正式部门概念方面的研究,描述了非正式部门概念的演化过程,总结了国外学者关于非正式部门特征的研究成果,建立了旅游非正式部门的研究框架。最后指出笔者对非正式部门的认识,以期引起学者们对这一领域的关注。 展开更多
关键词 非正式部门 旅游 研究框架
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船用燃机涡轮导叶扇形叶栅气动性能试验研究
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作者 牛夕莹 郑群 +3 位作者 高春祥 林枫 高杰 胡博 《舰船科学技术》 北大核心 2025年第2期113-119,共7页
为了验证全三维优化设计效果,并探索适用于船用燃气轮机工作特点的叶型,利用扇形涡轮叶栅试验台,针对某船用燃气轮机原型和改型两套涡轮导叶,开展了不同攻角下的扇形叶栅气动性能试验。应用五孔探针、叶片表面静压测量孔,分别测量了叶... 为了验证全三维优化设计效果,并探索适用于船用燃气轮机工作特点的叶型,利用扇形涡轮叶栅试验台,针对某船用燃气轮机原型和改型两套涡轮导叶,开展了不同攻角下的扇形叶栅气动性能试验。应用五孔探针、叶片表面静压测量孔,分别测量了叶栅出口流场、不同叶高处叶片型面的压力,分析了导叶出口截面速度场及总压损失分布,导叶根、中、顶这3个截面压力分布,以及节距平均出口气流角、总压损失系数沿叶高分布等。优化前后试验结果对比分析表明:经优化改型后,沿叶高方向导叶表面压力分布更趋均匀化,叶片后部加载特征更加明显,在试验攻角范围内(-10°~+10°)导叶总压损失系数明显减小,且攻角变化对损失影响较小。结果表明,导叶该型是成功的,改进后的导叶对变工况的适应性更加优良,非常适合用于工况变化较为频繁的船用燃气轮机。 展开更多
关键词 船用燃气轮机 涡轮导叶 扇形叶栅 气动性能
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基于风廓线雷达的四川盆地西部强降水过程风场特征
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作者 胡迪 谢晓林 +1 位作者 陈朝平 周秋雪 《高原气象》 北大核心 2025年第1期240-252,共13页
根据暖区暴雨的分型(西南涡型、副热带高压边缘型、西南急流型和东南风型),选取四类天气背景下四川盆地西部(成都地区)的暴雨过程,利用风廓线雷达新资料,详细分析了青藏高原-四川盆地特殊地形下,不同类型暖区暴雨中典型强降水发生、发... 根据暖区暴雨的分型(西南涡型、副热带高压边缘型、西南急流型和东南风型),选取四类天气背景下四川盆地西部(成都地区)的暴雨过程,利用风廓线雷达新资料,详细分析了青藏高原-四川盆地特殊地形下,不同类型暖区暴雨中典型强降水发生、发展时的风廓线特征。研究表明:(1)风廓线雷达资料可以很清楚地表现出对流层及边界层存在的中小尺度系统,不同类型强降水过程的风场演变特征同特殊地形与区域环流及天气系统的相互作用密切相关,除副高边缘型外,其他三种类型暖区暴雨典型过程发生前或发生时都出现了边界层东北风或偏东风;(2)垂直速度变化梯度大,直观地体现了这几次过程时间短、对流强的特征,降水开始后,向下的垂直速度明显减弱甚至转向的突变时期,代表气层中上升运动的明显增强,这种垂直速度的突变对于强降水的预测有指示意义;(3)垂直速度极值在强降水发生前或发生时会明显增大,并伴随有极值层降低的现象,水平风速极值和极值层有同步的增减趋势,大部分强降水过程发生前,中层都出现了中尺度急流,并伴随急流层的降低;(4)在这四种类型的暴雨过程中都有低空急流的参与,其中副高边缘型和西南涡型暴雨过程中,低空急流指数第一次增大都对降水的开始有1~2 h的预报提前量,而在东南风型和西南涡型过程中低空急流指数的突增预示了降水强度的增大。 展开更多
关键词 风廓线雷达 强降水 低空急流 暖区暴雨
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水利新质生产力的理论基础、内涵特征与发展重点
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作者 王晓璇 郑垂勇 《水利经济》 北大核心 2025年第1期1-6,共6页
水利新质生产力作为发展新质生产力的重要组成部分,在水资源的高效管理、利用及可持续发展方面发挥着重要作用,探讨其内涵特征与发展重点以及它在水利领域的具体体现,有助于促进水利行业的高质量发展。采用文献研究法梳理得出新质生产... 水利新质生产力作为发展新质生产力的重要组成部分,在水资源的高效管理、利用及可持续发展方面发挥着重要作用,探讨其内涵特征与发展重点以及它在水利领域的具体体现,有助于促进水利行业的高质量发展。采用文献研究法梳理得出新质生产力理论的产生背景与发展路径,结合水利行业特点,对水利新质生产力的六大特征和五大发展重点以及面临的挑战进行了深入分析,阐释了水利新质生产力对现代水资源管理的重要性,揭示了科技创新在推动水利产业转型中的关键作用,并指出通过前沿技术创新、制度创新、产业发展等手段实现水资源管理的优化的重要意义。 展开更多
关键词 生产力演进 高质量发展 水利新质生产力 水利行业 科技创新
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