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大型过程建模的Import/Export解决方案 被引量:3
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作者 张莉 王文 《计算机工程与应用》 CSCD 北大核心 2001年第12期23-26,共4页
文章分析了大型复杂过程的建模需求,基于已研发的企事业过程建模系统EPMS,提出了将Import/Export技术用于大型过程建模的解决方案,通过过程模型的拆分和组装,从而支持过程模型的多人员、异地并行建模模式和过程重用。
关键词 大型模型建模 import/export 软件工程 可视化
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Import/Export of China Crude Oil & Oil Products in 1998
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《China Oil & Gas》 CAS 1999年第1期62-62,共1页
关键词 import/export of China Crude Oil
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Enhancing Export Resilience Exports will continue to serve as an important engine driving China’s economic growth
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作者 Gao Yuan 《China Report ASEAN》 2025年第2期30-33,共4页
As one of the three key drivers of economic growth,export has been playing an important and positive role in the Chinese economy.According to the National Bureau of Statistics and World Bank,China’s gross domestic pr... As one of the three key drivers of economic growth,export has been playing an important and positive role in the Chinese economy.According to the National Bureau of Statistics and World Bank,China’s gross domestic product(GDP)in 2004 was US$1.96 trillion,with a total export of US$593.4 billion,accounting for 30.3 percent of GDP.Across the following 20 years,the share of export in GDP gradually declined to 24.47 percent in 2014 and 18.87 percent in 2024.But a look at China’s share of the global export market shows a continuing upward trend,and China’s position as the largest trading nation in goods has also become more secure. 展开更多
关键词 TRADING export driving
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Exporting Perfumes to China:Key Compliance and Import Requirements
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作者 Jarius Ji 《China Detergent & Cosmetics》 2025年第2期12-15,共4页
China's perfume market has been experiencing significant growth.The “2024 China Perfume and Fragrance White Paper”,jointly published by Eternal Group,DSM-Firmenich,and Ipsos in September 2024,reveals that the ma... China's perfume market has been experiencing significant growth.The “2024 China Perfume and Fragrance White Paper”,jointly published by Eternal Group,DSM-Firmenich,and Ipsos in September 2024,reveals that the market surged from 11.4 billion yuan in 2018 to 22.9 billion yuan in 2023,achieving a compound annual growth rate(CAGR) of 15%.With projections estimating a rise to 44 billion yuan by 2028 at a 14% CAGR,the sector's long-term growth prospects remain strong. 展开更多
关键词 growth prospects white paper China COMPLIANCE perfumes perfume market import requirements
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基于Null Importance分析慢病人群接受居家药学服务意愿的影响因素
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作者 赵科 杨宏昕 +2 位作者 武明芬 郭浩 赵志刚 《医药导报》 北大核心 2025年第8期1347-1351,共5页
目的探究慢病人群接受居家药学服务意愿的关键影响因素。方法采用中国适老化研究项目中内蒙古自治区及东北地区的调查数据,基于Null Importance方法,筛选影响慢病人群参与居家药学服务意愿的关键因素。构建logistic回归模型,采用5折交... 目的探究慢病人群接受居家药学服务意愿的关键影响因素。方法采用中国适老化研究项目中内蒙古自治区及东北地区的调查数据,基于Null Importance方法,筛选影响慢病人群参与居家药学服务意愿的关键因素。构建logistic回归模型,采用5折交叉验证方法,以准确率及AUC为指标,评价特征选择对模型性能的影响。结果Null Importance方法筛选出10个关键因素,且特征选择后logistic回归模型性能得到提升。显著影响患者对居家药学服务接受意愿的因素包括:获取药品信息途径个数(OR=1.261,95%CI=1.182~1.345),药物适应证认知(OR=1.342,95%CI=1.124~1.603),是否保留药盒(OR=1.218,95%CI=1.015~1.462),用药依从性得分(OR=0.881,95%CI=0.839~0.925),用药素养得分(OR=0.631,95%CI=0.488~0.817),用药指导服务了解程度(OR=1.211,95%CI=1.017~1.442)。结论在Null Importance特征选择方法基础上构建的logistic回归模型,具有良好的性能,有助于慢病人群接受居家药学服务意愿影响因素的分析。 展开更多
关键词 Null importance 居家药学服务 意愿 慢病
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家蚕BmNPV多角体蛋白的表达规律及importin α介导的Polh入核转运 被引量:1
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作者 李佳乐 王星洋 吴小锋 《生物工程学报》 北大核心 2025年第7期2647-2657,共11页
家蚕核型多角体病毒(Bombyx mori nucleopolyhedrovirus, BmNPV)对蚕丝业的危害极大。该病毒的多角体蛋白编码基因polyhedrin(polh)能够在病毒感染极晚期超高水平表达,并在细胞核内形成包涵体,多角体蛋白转运到宿主细胞核中的详细机制... 家蚕核型多角体病毒(Bombyx mori nucleopolyhedrovirus, BmNPV)对蚕丝业的危害极大。该病毒的多角体蛋白编码基因polyhedrin(polh)能够在病毒感染极晚期超高水平表达,并在细胞核内形成包涵体,多角体蛋白转运到宿主细胞核中的详细机制目前未知。为阐明病毒蛋白的入核机制,本研究通过分子克隆、免疫共沉淀(co-immunoprecipitation, CO-IP)、免疫荧光等方法,详细分析了多角体蛋白(polyhedrin, Polh)的表达规律,并进一步揭示了宿主蛋白importin α通过蛋白互作的方式参与多角体蛋白的入核转运,为进一步深入阐明包括Polh在内的诸多杆状病毒入核蛋白的入核机制提供了参考。 展开更多
关键词 家蚕核型多角体病毒 多角体蛋白 importinα 入核转运
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Analysis of Influencing Factors of Academic Warning in Higher Vocational Colleges Based on the Importance of Machine Learning Features and Paths to Improve Learning Ability 被引量:1
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作者 Meimei Huang Lei Zhang Xifeng Fan 《Journal of Contemporary Educational Research》 2025年第5期75-80,共6页
The traditional academic warning methods for students in higher vocational colleges are relatively backward,single,and have many influencing factors,which have a limited effect on improving their learning ability.A da... The traditional academic warning methods for students in higher vocational colleges are relatively backward,single,and have many influencing factors,which have a limited effect on improving their learning ability.A data set was established by collecting academic warning data of students in a certain university.The importance of the school,major,grade,and warning level for the students was analyzed using the Pearson correlation coefficient,random forest variable importance,and permutation importance.It was found that the characteristic of the major has a great impact on the academic warning level.Countermeasures such as dynamic adjustment of majors,reform of cognitive adaptation of courses,full-cycle academic support,and data-driven precise intervention were proposed to provide theoretical support and practical paths for universities to improve the efficiency of academic warning and enhance students’learning ability. 展开更多
关键词 Academic warning Pearson correlation coefficient Random forest variable importance Permutation importance
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China's rare earth import and export analysis in the 1st half of 2024
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作者 Zhang Wencan 《China Rare Earth Information》 2024年第3期11-14,共4页
1.Export situation from January to June 20241.1 Overall export situation of rare earth products Export value of rare earth products showed a wholistic down trend affected by the continuousdecline in rare earth prices ... 1.Export situation from January to June 20241.1 Overall export situation of rare earth products Export value of rare earth products showed a wholistic down trend affected by the continuousdecline in rare earth prices in the first half year,however,export volume increased.According to statistics from the General Administration of Customs,from January to June 2024,China's cumulative export of rare earth products was 29,095 tons,an increase of 11%year-on-year,with a cumulative export value of 256 million US dollars,a decrease of 43% year-on-year,Figure 1. 展开更多
关键词 export FIGURE DOLLAR
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Research on the Influencing Factors of China's Cross-border E-commerce Exports to Countries Along the“Belt and Road” 被引量:1
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作者 Xinhao Zhao 《Proceedings of Business and Economic Studies》 2025年第2期321-325,共5页
Cross-border e-commerce,as a new form of international trade,has shown great development potential in the context of the“Belt and Road”initiative.Based on the cross-border e-commerce export data from 2015 to 2024,th... Cross-border e-commerce,as a new form of international trade,has shown great development potential in the context of the“Belt and Road”initiative.Based on the cross-border e-commerce export data from 2015 to 2024,this paper analyzes the influencing factors of China's cross-border e-commerce exports to countries along the“Belt and Road”by constructing an econometric model.The study found that factors such as the perfection of digital infrastructure,the efficiency of logistics and transportation,the convenience of payment and settlement,and the penetration rate of consumers online shopping significantly affect the export scale of cross-border e-commerce.Institutional factors such as the development level of e-commerce platforms in countries along the route,market access thresholds,and tariff policies also play an important role.Based on the research results,suggestions are put forward to strengthen the construction of cross-border payment system,optimize the logistics distribution network,promote customs clearance facilitation,and deepen cooperation in the field of e-commerce,to provide references for promoting the development of China's crossborder e-commerce exports to countries along the“Belt and Road.” 展开更多
关键词 The Belt and Road Cross-border e-commerce export trade Influencing factor
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Distribution,species richness,and relative importance of different plant life forms across drylands in China 被引量:1
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作者 Shuran Yao Weigang Hu +16 位作者 Mingfei Ji Abraham Allan Degen Qiajun Du Muhammad Adnan Akram Yuan Sun Ying Sun Yan Deng Longwei Dong Haiyang Gong Qingqing Hou Shubin Xie Xiaoting Wang Jinzhi Ran Bernhard Schmid Qinfeng Guo Karl J.Niklas Jianming Deng 《Plant Diversity》 2025年第2期273-281,共9页
Studies on plant diversity are usually based on the total number of species in a community.However,few studies have examined species richness(SR)of different plant life forms in a community along largescale environmen... Studies on plant diversity are usually based on the total number of species in a community.However,few studies have examined species richness(SR)of different plant life forms in a community along largescale environmental gradients.Particularly,the relative importance(RIV)of different plant life forms in a community and how they vary with environmental variables are still unclear.To fill these gaps,we determined plant diversity of ephemeral plants,annual herbs,perennial herbs,and woody plants from 187 sites across drylands in China.The SR patterns of herbaceous plants,especially perennial herbs,and their RIV in plant communities increased with increasing precipitation and soil nutrient content;however,the RIV of annual herbs was not altered along these gradients.The SR and RIV of ephemeral plants were affected mainly by precipitation seasonality.The SR of woody plants had a unimodal relationship with air temperature and exhibited the highest RIV and SR percentage in plant communities under the harshest environments.An obvious shift emerged in plant community composition,SR and their critical impact factors at 238.5 mm of mean annual precipitation(MAP).In mesic regions(>238.5 mm),herbs were the dominant species,and the SR displayed a relatively slow decreasing rate with increasing aridity,which was mediated mainly by MAP and soil nutrients.In arid regions(<238.5 mm),woody plants were the dominant species,and the SR displayed a relatively fast decreasing rate with increasing aridity,which was mediated mainly by climate variables,especially precipitation.Our findings highlight the importance of comparative life form studies in community structure and biodiversity,as their responses to gradients differed substantially on a large scale. 展开更多
关键词 DRYLANDS Environmental gradients Plant life forms Relative importance Species richness THRESHOLD
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Laboratory Diagnosis and Molecular Epidemiological Characterization of the First Imported Case of Lassa Fever in China 被引量:1
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作者 Yuliang Feng Wei Li +11 位作者 Mingfeng Jiang Hongrong Zhong Wei Wu Lyubo Tian Guo Chen Zhenhua Chen Can Luo Rongmei Yuan Xingyu Zhou Jiandong Li Xiaorong Yang Ming Pan 《Biomedical and Environmental Sciences》 2025年第3期279-289,共11页
Objective This study reports the first imported case of Lassa fever(LF)in China.Laboratory detection and molecular epidemiological analysis of the Lassa virus(LASV)from this case offer valuable insights for the preven... Objective This study reports the first imported case of Lassa fever(LF)in China.Laboratory detection and molecular epidemiological analysis of the Lassa virus(LASV)from this case offer valuable insights for the prevention and control of LF.Methods Samples of cerebrospinal fluid(CSF),blood,urine,saliva,and environmental materials were collected from the patient and their close contacts for LASV nucleotide detection.Whole-genome sequencing was performed on positive samples to analyze the genetic characteristics of the virus.Results LASV was detected in the patient’s CSF,blood,and urine,while all samples from close contacts and the environment tested negative.The virus belongs to the lineage IV strain and shares the highest homology with strains from Sierra Leone.The variability in the glycoprotein complex(GPC)among different strains ranged from 3.9%to 15.1%,higher than previously reported for the seven known lineages.Amino acid mutation analysis revealed multiple mutations within the GPC immunogenic epitopes,increasing strain diversity and potentially impacting immune response.Conclusion The case was confirmed through nucleotide detection,with no evidence of secondary transmission or viral spread.The LASV strain identified belongs to lineage IV,with broader GPC variability than previously reported.Mutations in the immune-related sites of GPC may affect immune responses,necessitating heightened vigilance regarding the virus. 展开更多
关键词 Lassa fever The first imported case Laboratory diagnosis Epidemiological characterization
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Beyond statistical significance:Embracing minimal clinically important difference for better patient care
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作者 Naveen Jeyaraman Madhan Jeyaraman +2 位作者 Swaminathan Ramasubramanian Sangeetha Balaji Sathish Muthu 《World Journal of Methodology》 2025年第1期33-41,共9页
The minimal clinically important difference(MCID)represents a pivotal metric in bridging the gap between statistical significance and clinical relevance,addressing the direct impact of medical interventions from the p... The minimal clinically important difference(MCID)represents a pivotal metric in bridging the gap between statistical significance and clinical relevance,addressing the direct impact of medical interventions from the patient's perspective.This comprehensive review analyzes the evolution,applications,and challenges of MCID across medical specialties,emphasizing its necessity in ensuring that clinical outcomes not only demonstrate statistical significance but also offer genuine clinical utility that aligns with patient expectations and needs.We discuss the evolution of MCID since its inception in the 1980s,its current applications across various medical specialties,and the methodologies used in its calculation,highlighting both anchor-based and distribution-based approaches.Furthermore,the paper delves into the challenges associated with the application of MCID,such as methodological variability and the interpretation difficulties that arise in clinical settings.Recommendations for the future include standardizing MCID calculation methods,enhancing patient involvement in setting MCID thresholds,and extending research to incorporate diverse global perspectives.These steps are critical to refining the role of MCID in patient-centered healthcare,addressing existing gaps in methodology and interpretation,and ensuring that medical interventions lead to significant,patient-perceived improvements. 展开更多
关键词 Minimal clinically important difference Patient-centered care Clinical relevance Global health
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China's textile and garment exports showed a decline in the first two months of 2025
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《China Textile》 2025年第2期30-33,共4页
In January and February of 2025,China's textile and clothing exports totaled 42.88 billion US dollars,marking a 4.5%decrease compared to the same period in the previous year.The primary factors contributing to thi... In January and February of 2025,China's textile and clothing exports totaled 42.88 billion US dollars,marking a 4.5%decrease compared to the same period in the previous year.The primary factors contributing to this decline are as follows:First,China’s textile and clothing exports nearly reached USD 45 billion in January and February of 2024,setting a high base.Second,in order to avoid tariffs imposed by the United States,enterprises generally concentrated their exports at the end of last year and January this year. 展开更多
关键词 GARMENT exportS textile clothing exports DECLINE TEXTILE TARIFFS China United States
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Chinese clothing exports bloom with resilience amidst challenges
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作者 Qiu Shuchen 《China Textile》 2025年第4期32-33,共2页
Since the beginning of this year, the China-US economic and trade tensions have brought many challenges to China's clothing export companies. Nevertheless, in the face of difficulties, China's clothing foreign... Since the beginning of this year, the China-US economic and trade tensions have brought many challenges to China's clothing export companies. Nevertheless, in the face of difficulties, China's clothing foreign trade still shows strong resilience and adaptability. From January to May, China's clothing exports showed characteristics such as increased volume, lower prices, category differentiation, and multi-point market layout. Meanwhile, Chinese clothing companies have actively responded to trade friction impacts by closely monitoring tariff negotiations, accelerating transformation and upgrading, exploring diversified international markets, and deepening domestic markets. 展开更多
关键词 increased volume clothing export companies RESILIENCE strong resilience China US economic trade tensions Chinese clothing exports lower prices adaptability
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Research on the Impact of the Construction of Cross-border E-commerce Comprehensive Pilot Zones on China’s Export Transformation and Upgrading
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作者 Jiahui Zhao 《Proceedings of Business and Economic Studies》 2025年第6期45-52,共8页
Cross-border e-commerce has emerged as a new growth point in foreign trade.While the Dalian comprehensive pilot zone has made some progress,its development is constrained by issues such as the global economic slowdown... Cross-border e-commerce has emerged as a new growth point in foreign trade.While the Dalian comprehensive pilot zone has made some progress,its development is constrained by issues such as the global economic slowdown,the relatively small scale of cross-border e-commerce,a high concentration of export commodities,imperfect information mechanisms,and high overall costs.To address these challenges,this paper explores the importance of the construction of the Dalian comprehensive pilot zone for cross-border e-commerce to the transformation and upgrading of exports.Based on my research project,“Research on Path Optimization of Financial Support for the Development of Advanced Manufacturing Clusters in Dalian,”this paper analyzes the current challenges and limiting factors and proposes corresponding countermeasures and suggestions. 展开更多
关键词 Cross-border e-commerce comprehensive pilot zone Cross-border e-commerce export transformation and upgrading Foreign trade export
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The First Imported Case of Lassa Fever in China-Implications for Global Health Surveillance
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作者 Qiyong Liu 《Biomedical and Environmental Sciences》 2025年第3期277-278,共2页
Lassa fever(LF)is an acute viral hemorrhagic disease caused by Lassa virus(LASV)[1].LASV is transmitted to humans primarily through direct contact with infected Mastomys rodents,or items polluted by infected rodents[2... Lassa fever(LF)is an acute viral hemorrhagic disease caused by Lassa virus(LASV)[1].LASV is transmitted to humans primarily through direct contact with infected Mastomys rodents,or items polluted by infected rodents[2].LF is difficult to diagnose without laboratory tests because of its various symptoms,ranging from no symptoms to multiple organ failure and death[2].West Africa is the traditionally endemic regions for LF,with confirmed and sporadic outbreaks reported in countries,such as Nigeria,Burkina Faso and Guinea[2].LF cases have also been detected in some non-endemic regions due to international travels[3,4],for example,the United Kingdom found LF imported cases from Mali[5].This indicates that the countries are exposed to imported risks of LF due to the globalization.The recent publication[6]reported the first imported cases of LF in China,providing important insights into the understanding and control of the emerging infectious disease. 展开更多
关键词 importED TRAVEL traditionally
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Opportunities,Challenges,and Strategies of China’s Sporting Goods Export under the Background of RCEP
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作者 Qixuan Yang Guohua Ma 《Proceedings of Business and Economic Studies》 2025年第4期336-344,共9页
China has long been recognized as a major producer and exporter of sporting goods,with its share of global sporting goods exports continuing to rise steadily.The implementation of the RCEP agreement presents both oppo... China has long been recognized as a major producer and exporter of sporting goods,with its share of global sporting goods exports continuing to rise steadily.The implementation of the RCEP agreement presents both opportunities and challenges for China’s sporting goods export trade.To achieve sustained growth,enterprises must enhance their innovation capacity,improve product quality,strengthen brand influence,and refine marketing strategies.At the same time,they must proactively manage risks related to exchange rate fluctuations and rising international logistics costs. 展开更多
关键词 RCEP Sporting goods exportS CHALLENGES OPPORTUNITIES
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Back to Base--China ramps up support to help export-oriented companies to gain a stronghold in the domestic market
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作者 GE LIJUN 《ChinAfrica》 2025年第6期48-50,共3页
Chinese consumers browsing e-commerce platforms or walking in supermarket aisles have noticed a new feature:dedicated sections for high-quality export products.Far from being a mere marketing gimmick,this trend emerge... Chinese consumers browsing e-commerce platforms or walking in supermarket aisles have noticed a new feature:dedicated sections for high-quality export products.Far from being a mere marketing gimmick,this trend emerged due to intense pressure from a slide in global demand. 展开更多
关键词 export oriented companies domestic market global demand e commerce platforms high quality export products supermarket aisles
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Role of feature importance in geomechanical classification of rock slopes
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作者 Ashutosh Kainthola Vishnu Himanshu Ratnam Pandey +1 位作者 Gaurav Kushwaha Vikas Yadav 《Deep Resources Engineering》 2025年第1期9-24,共16页
Rock slope along motorways in the Higher Himalayan terrains are prone to various types of failure.In order to effectively mitigate these failures,a thorough assessment of rock mass behavior is entailed.The present res... Rock slope along motorways in the Higher Himalayan terrains are prone to various types of failure.In order to effectively mitigate these failures,a thorough assessment of rock mass behavior is entailed.The present research employs and compares widely practiced geo-mechanical classification schemes viz.,RQD,RMR,SMR,Q-slope,and GSI.A 23 km road cut section,along Sangla to Chitkul route,in Higher Himalayan region(India)has been taken up for this work.Total of 18 locations were selected,and their slope and rockmass properties were examined.Afterwards,the most influencing parameters in RMR,SMR,and Q-Slope were evaluated through a machine learning algorithm,i.e.,Random Forest.For RMRbasic,about 83%of rock-slopes were designated in good condition and rest were of Fair quality.Evaluation of slope mass rating along all 18-locations highlighted eight-sites as partially unstable,six-sites as partially stable.Remaining four locations varied between,Very Bad to Bad slope-conditions,necessitating the installation of mechanical supports and redesign of slopes.For SMR classification,feature importance analysis revealed the predominance of F3 variable,RQD and intact rock strength.Q-Slope approach was incorporated to identify the most stable steepest angle of the examined locations.For Q-Slope rating,Jn and RQD were found to have the most influence in classification of the slopes.Three zones on the basis of GSI-scores have been identified in the study area,i.e.,A(6595),B(4555),and C(2535).This study highlights the application of multiple geomechanical classification schemes,demonstrating how each approach can complement the others. 展开更多
关键词 SMR Q-slope GSI Feature importance Partial dependence Economic Mitigations
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How Does Digital Trade Development Influence Export Sophistication: Empirical Evidence From the Panel Data of Chinese Cities
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作者 Duan Dingyun Feng Zongxian 《Contemporary Social Sciences》 2025年第5期103-121,共19页
This paper employs the entropy method to measure the development level of digital trade across 282 prefecture-level cities in China from 2011 to 2022 and empirically investigates the impact of this digital trade devel... This paper employs the entropy method to measure the development level of digital trade across 282 prefecture-level cities in China from 2011 to 2022 and empirically investigates the impact of this digital trade development on export sophistication and the underlying mechanisms used.The results show that digital trade development significantly enhances export sophistication.Mechanism analysis suggests that this effect is primarily realized through the optimization of industrial structures and the enhancement of technological innovation capabilities.Further heterogeneity analysis reveals that the impact of digital trade development on export sophistication varies depending on geographical location,inclusion in urban agglomerations,and coastal status.These findings underscore the importance of comprehensively promoting digital trade development,fostering technological progress and innovation,and continuously upgrading industrial structures to provide new pathways for enhancing export sophistication. 展开更多
关键词 digital trade export sophistication industrial structure technological innovation
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