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A new approach to classroom-based language assessment 被引量:2
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作者 LYLE BACHMAN BARBARA DAMBÖCK 《语言测试与评价》 2022年第1期4-25,116,共23页
If one considers the number of language learners that are worldwide,the number of classroom-based language assessments(CBLAs)that are given each year,and the number of decisions that are made on the basis of these,it ... If one considers the number of language learners that are worldwide,the number of classroom-based language assessments(CBLAs)that are given each year,and the number of decisions that are made on the basis of these,it is obvious that in terms of sheer numbers,more students are affected by CBLAs per year than by those based on large-scale language assessments.Because of this,it is essential that classroom teachers have the knowledge,skills,and tools to enable them to develop and use CBLAs that they can justify to stakeholders,e.g.,students,parents,and school authorities.In this paper we describe the approach to CBLAs that we have developed.First,we discuss the role of assessment in teaching and learning,the kinds of decisions that classroom teachers need to make,and the different modes of CBLAs.We then describe the process of using CBLAs to help teachers make decisions that will have beneficial consequences.Next,we discuss fairness and accountability in assessment and the process of assessment justification,including an assessment use argument.Finally,we discuss the process of developing CBLAs,using an example of a classroom-based language assessment to illustrate this. 展开更多
关键词 classroom-based language assessment role of assessment in teaching and learning formative decisions summative decisions high- low- medium-stakes assessments modes of classroom-based assessment language assessment use fairness in assessment accountability in assessment assessment justification assessment use argument
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Environmental sustainability assessment of remediation alternatives for highly contaminated marine sediments
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作者 Alessia Amato Alessandro Becci +2 位作者 Giulia Merli Francesca Beolchini Antonio Dell’Anno 《Journal of Environmental Sciences》 2026年第1期731-740,共10页
This study compares the environmental sustainability of five alternatives for the remediation of marine sediments of one of the most polluted coastal sites in Europe(Bagnoli-Coroglio bay,Mediterranean Sea),using the L... This study compares the environmental sustainability of five alternatives for the remediation of marine sediments of one of the most polluted coastal sites in Europe(Bagnoli-Coroglio bay,Mediterranean Sea),using the Life Cycle Assessment(LCA)methodology.The treatments are either in-situ or exsitu,the latter requiring an initial dredging to transport the contaminated sediments to the management site.More in detail,four ex-situ remediation technologies based on landfilling,bioremediation,electrokinetic technique and soil washing were identified.These technologies are compared to an in-situ strategy currently under validation for enhancing bioremediation of the polluted sediments of the Bagnoli-Coroglio site.Our results indicate that the disposal in landfilling site is the worst option in most categories(e.g.,650 kg CO_(2) eq./t of treated sediment,considering the nearest landfilling site),followed by the bioremediation,mainly due to the high energy demand.Electrokinetic remediation,soil washing,and innovative in-situ technology represent the most sustainable options.In particular,the new in-situ technology appears to be the least impacting in all categories(e.g.,54 kg CO_(2) eq./t of treated sediment),although it is expected to require longer treatment time(estimated up to 12 months based on its potential efficiency).It can reduce the impact on climate change more than 12 times compared to the disposal and 7 times compared to bioremediation in addition to the possibility to avoid/reduce the dredging operations and the consequent dispersion of pollutants.The results open relevant perspectives towards more eco-sustainable and costly effective actions for the reclamation of contaminated marine sediments. 展开更多
关键词 Life cycle assessment Marine sediments contamination ELECTROKINETIC BIOREMEDIATION Ex-situ remediation In-situ remediation
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Distribution,assessment,and sources of nutrients in river water in the headwaters of the Shule River Basin,Northeastern Qinghai-Tibet Plateau
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作者 Qin Yang Donghui Shangguan +2 位作者 Tianding Han Da Li Asim Qayyum Butt 《Journal of Environmental Sciences》 2026年第1期502-511,共10页
Nitrogen(N)and phosphorus(P)are essential nutrients and can significantly impact primary productivity of the ecosystem causing water environmental problems.However,their cycling mechanisms are not well understood in a... Nitrogen(N)and phosphorus(P)are essential nutrients and can significantly impact primary productivity of the ecosystem causing water environmental problems.However,their cycling mechanisms are not well understood in alpine mountains with climate change.Hence,94 samples of river water were collected from 2018 to 2020 in the headwaters of the Shule River Basin to assess the nutrients spatiotemporal distribution and combined ap-proach of water quality index to assess water quality and potential sources.The findings depict that high nutrient concentrations were found to coincide with snowmelt and glacial meltwater and rainfall recharge periods,while total flux peaked from June to September due to increased runoff.Notably,total nitrogen(TN)concentrations were significantly higher near the town,primarily attributed to the replenishment of nitrate(NO_(3)^(‒)-N)from live-stock manure.The high total P(TP)was near the glacier,which was attributed to the transportation of glacial sediments into the river,and pH was another critical factor.N was the primary nutrient limiting factor for the growth of phytoplankton in river water.Although the migration and transport of nutrients have altered with climate change,river water quality is good in alpine mountains based on an overall evaluation.These findings contribute to enriching nutrient datasets and highlight the importance of water resource management and water quality assessment in sensitive and fragile alpine mountains. 展开更多
关键词 NUTRIENTS Spatiotemporal distribution Water quality assessment Potential sources Alpine mountains
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Correction:Flux‑based assessment of ozone visible foliar injury in Southern Alps
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作者 Elena Marra Alessandra De Marco +8 位作者 Andrea Ebone Anna Maria Ferrara Fabio Giannetti Francesco Tagliaferro Pierre Sicard Andrei Popa Ionel Popa Elena Paoletti Yasutomo Hoshika 《Journal of Forestry Research》 2026年第2期305-305,共1页
Correction to:Journal of Forestry Research(2025)36:124 https://doi.org/10.1007/s11676-025-01918-8 In this article the author’s name Yasutomo Hoshika was incorrectly written as Yasutoma Hoshika.The original article ha... Correction to:Journal of Forestry Research(2025)36:124 https://doi.org/10.1007/s11676-025-01918-8 In this article the author’s name Yasutomo Hoshika was incorrectly written as Yasutoma Hoshika.The original article has been corrected. 展开更多
关键词 visible foliar injury southern Alps flux based assessment yasutomo hoshika journal forestry research yasutoma hoshikathe OZONE
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Bridging gaps in plant conservation:The national red list assessment initiative in India
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作者 Jithu K.Jose 《Plant Diversity》 2026年第1期225-226,共2页
Plants constitute nearly 80%of the planet’s total biomass(Bar-On et al.,2018);however,this vital group is experiencing severe threats,and recent evaluations indicate that approximately 45%of the world's described... Plants constitute nearly 80%of the planet’s total biomass(Bar-On et al.,2018);however,this vital group is experiencing severe threats,and recent evaluations indicate that approximately 45%of the world's described plant species are at risk of extinction(Bachman et al.,2024).The number of plant extinctions has increased by 60%in the last 100 years(Di Marco et al.,2017).Over the past 250 years,571 plant species have gone extinct—more than twice the combined total of extinct birds,mammals,and amphibians(217 species)(Briggs,2019). 展开更多
关键词 biomass plant conservation biodiversity threats national red list assessment plant extinction
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Quantifying and mapping the heterogeneity of rock joint roughness and shear strength for rapid field assessment
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作者 Changshuo Wang Chen Huang +4 位作者 Rui Yong Guangjian Liu Pengju An Zhongjun Ma Jibo Qin 《International Journal of Mining Science and Technology》 2026年第1期149-167,共19页
Rock mass stability is significantly influenced by the heterogeneity of rock joint roughness and shear strength.While modern technology facilitates assessing roughness heterogeneity,evaluating shear strength heterogen... Rock mass stability is significantly influenced by the heterogeneity of rock joint roughness and shear strength.While modern technology facilitates assessing roughness heterogeneity,evaluating shear strength heterogeneity remains challenging.To address this,this study first captures the morphology of large-scale(1000 mm × 1000 mm) slate and granite joints via 3D laser scanning.Analysis of these surfaces and corresponding push/pull tests on carved specimens revealed a potential correlation between the heterogeneity of roughness and shear strength.A comparative evaluation of five statistical metrics identified information entropy(Hs) as the most robust indicator for quantifying rock joint heterogeneity.Further analysis using Hsreveals that the heterogeneity is anisotropic and,critically,that shear strength heterogeneity is governed not only by roughness heterogeneity but is also significantly influenced by the mean roughness value,normal stress,and intact rock tensile strength.Consequently,a simple comparison of roughness Hsvalues is insufficient for reliably comparing shear strength heterogeneity.To overcome this limitation,a theoretical framework is developed to explicitly map fundamental roughness statistics(mean and heterogeneity) to shear strength heterogeneity.This framework culminates in a practical workflow that allows for the rapid,field-based assessment of shear strength heterogeneity using readily obtainable rock joint roughness data. 展开更多
关键词 Rock joint heterogeneity ROUGHNESS Shear strength Information entropy Push/pull test Rapid field assessment
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Geologic hazard susceptibility assessment based on statistical optimization and machine learning:A case study of the Loess Plateau,Shaanxi Province,northwestern China
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作者 Hao Cheng Zhen-kai Zhang +5 位作者 Zeng-lin Hong Wen-long Zhang Hong-quan Teng Shuai Yang Zi-yao Wang Yu-xuan Dong 《China Geology》 2026年第1期136-151,共16页
This study developed a modeling methodology for statistical optimization-based geologic hazard susceptibility assessment,aiming to enhance the comprehensive performance and classification accuracy of the assessment mo... This study developed a modeling methodology for statistical optimization-based geologic hazard susceptibility assessment,aiming to enhance the comprehensive performance and classification accuracy of the assessment models.First,the cumulative probability method revealed that a low probability(15%)of geologic hazards between any two geologic hazard points occurred outside a buffer zone with a radius of 2297 m(i.e.,the distance threshold).The training dataset was established,consisting of negative samples(non-hazard points)randomly generated based on the distance threshold,positive samples(i.e.,historical hazards),and 13 conditioning factors.Then,models were built using five machine learning algorithms,namely random forest(RF),gradient boosting decision tree(GBDT),naive Bayes(NB),logistic regression(LR),and support vector machine(SVM).The comprehensive performance of the models was assessed using the area under the receiver operating characteristic curve(AUC)and overall accuracy(OA)as indicators,revealing that RF exhibited the best performance,with OA and AUC values of 2.7127 and 0.981,respectively.Furthermore,the machine learning models constructed by considering the distance threshold outperformed those built using the unoptimized dataset.The characteristic factors were ranked using the mutual information method,with their scores decreasing in the order of rainfall(0.1616),altitude(0.06),normalized difference vegetation index(NDVI;0.04),and distance from roads(0.03).Finally,the geologic hazard susceptibility classification was assessed using the natural breaks method combined with a clustering algorithm.The results indicate that the clustering algorithm exhibited higher classification accuracy than the natural breaks method.The findings of this study demonstrate that the proposed model optimization scheme can provide a scientific basis for the prevention and control of geologic hazards. 展开更多
关键词 COLLAPSE LANDSLIDE Debris flow Geologic hazard susceptibility assessment Machine learning RF-GBDT-NB-LR-SVM Cumulative probability Cluster analysis Loess Plateau Geologic hazard prevention and control Geological survey engineering
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Geriatric assessment for predicting outcomes among patients with aortic stenosis undergoing transcatheter aortic valve implantation 被引量:1
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作者 Calvo E Castillo P +10 位作者 Romaguera R Llaó I Zafrilla R Domene G Alegre O Lorente V Muntané-Carol G Formiga F de la Cuerda FJ Gomez Hospital JA Ariza-Solè A 《Journal of Geriatric Cardiology》 2025年第5期516-524,共9页
Background There is scarce data about comparisons between geriatric assessment tools in patients with aortic stenosis(AS).We aimed to describe the geriatric profile of patients with AS undergoing transcatheter aortic ... Background There is scarce data about comparisons between geriatric assessment tools in patients with aortic stenosis(AS).We aimed to describe the geriatric profile of patients with AS undergoing transcatheter aortic valve implantation(TAVI)and to analyze the ability of different tools for predicting clinical outcomes in this context.Methods This was a single center retrospective registry including patients with AS undergoing TAVI and surviving to hospital discharge.The primary endpoint was all-cause mortality or need for urgent readmission one year after TAVI.Results A total of 377 patients were included(mean age of 80.4 years).Most patients were independent or mildly dependent,with an optimal cognitive status.The proportion of frailty ranged from 17.6%to 49.8%.A total of 20 patients(5.3%)died and 110/377 patients(29.2%)died or were readmitted during follow up.Overall,most components of the geriatric assessment showed an association with clinical outcomes.Disability for instrumental activities showed a significant association with mortality and a strong association with the rate of mortality or readmission.The association between frailty and clinical outcomes was higher for short physical performance battery(SPPB),essential frailty toolset(EFT)and the frailty index based on comprehensive geriatric assessment(IF-VIG)and lower for Fried criteria and FRAIL scale.Conclusions AS patients from this series presented a good physical performance,optimal cognitive status and a reasonably low prevalence of frailty.The best predictive ability was observed for disability for instrumental activities and frailty as measured by the EFT,SPPB and the IF-VIG. 展开更多
关键词 transcatheter aortic valve implantation tavi analyze ability different tools Geriatric assessment describe geriatric profile geriatric assessment tools Transcatheter Aortic Valve Implantation FRAILTY Aortic Stenosis
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Rapid Post-Earthquake Impact and Recovery Assessment:The 2025 M_(w)7.7 Myanmar Earthquake
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作者 Wenkai Chen Jiajie Wu +6 位作者 Gang Rao Xue Li Lize Chen Yuyang Peng Zhenhang Zhang Ming Yi Yanping Sun 《Journal of Earth Science》 2025年第5期2380-2386,共7页
INTRODUCTION On March 28,2025,at 06:20:52 UTC,a shallow,magnitude M_(w)7.7 earthquake struck Myanmar(Burma)with an epicenter near the major city of Mandalay.This event,the strongest seismic activity recorded in Myanma... INTRODUCTION On March 28,2025,at 06:20:52 UTC,a shallow,magnitude M_(w)7.7 earthquake struck Myanmar(Burma)with an epicenter near the major city of Mandalay.This event,the strongest seismic activity recorded in Myanmar since 1950,generated intense shaking across much of the country,extended into regions of Thailand,and was felt in China's Yunnan and Guangxi provinces. 展开更多
关键词 impact assessment Mandalay seismic activity recovery assessment EARTHQUAKE MAGNITUDE Myanmar
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Erratum to:Rapid Post-Earthquake Impact and Recovery Assessment:The 2025 Mw 7.7 Myanmar Earthquake
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作者 Wenkai Chen Jiajie Wu +6 位作者 Gang Rao Xue Li Lize Chen Yuyang Peng Zhenhang Zhang Ming Yi Yanping Sun 《Journal of Earth Science》 2025年第6期I0002-I0002,共1页
Erratum to:Journal of Earth Science https://doi.org/10.1007/s12583-025-0187-4 The original version of this article unfortunately contained one mistake.The presentation in Page2384 was incorrect.The corrected one is gi... Erratum to:Journal of Earth Science https://doi.org/10.1007/s12583-025-0187-4 The original version of this article unfortunately contained one mistake.The presentation in Page2384 was incorrect.The corrected one is given below.The NTL loss ratio(Figure 4a)was calculated as the variation between pre-earthquake(March 27)and post-earthquake(March 28)radiance values in cloud-free areas. 展开更多
关键词 ntl loss ratio figure impact assessment cloud free areas earth science recovery assessment radiance values EARTHQUAKE loss ratio
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Road Infrastructure Assessment and Traffic Dynamics Using GIS:A Case Study in the Philippines
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作者 Mary Joy Fruelda Shandra Lairene Fampulme +7 位作者 Faith Fontamillas Jemelene Lilang Allan Fruelda III Isagani Madla Crisnel Love Factor Kio Alyson Rogero Raymond Jay Severo Jerome Gacu 《Revue Internationale de Géomatique》 2025年第1期187-207,共21页
Road condition assessment involves evaluating the physical state of roadways to determine necessary maintenance and rehabilitation,while traffic assessment focuses on analyzing vehicle flow patterns to improve traffic... Road condition assessment involves evaluating the physical state of roadways to determine necessary maintenance and rehabilitation,while traffic assessment focuses on analyzing vehicle flow patterns to improve traffic management.This study employs Geographic Information Systems(GIS)to assess and evaluate road conditions and traffic dynamics in the ruralmunicipality ofOdiongan,Romblon,Philippines.GISmapping enabled a spatially detailed classification of road conditions,identifying areas categorized as excellent,good,fair,or poor,and highlighted sections requiring maintenance or rehabilitation.These assessments are crucial for enhancing the transportation framework amid escalating developmental and demographic demands.Concurrently,GIS was used to visualize and analyze traffic composition and flow,with the study measuring the Level of Service(LOS)for traffic,emphasizing vehicle composition during peak and off-peak periods.Findings revealed amix of good to fair road conditions across most ofOdiongan,with twelve(12)barangays suffering from poor conditions necessitating rehabilitation.Traffic composition was dominated by motorcycles and tricycles,experiencing a significant uptick in volume during peak hours.The GIS-based evaluation pointed out an unsatisfactory LOS(ranging from C to F)at all stations,underscoring the need for enhanced signalization and intersection upgrades.By leveraging GIS to provide a comprehensive understanding of road and traffic conditions,this study lays the groundwork for an integrated transportationmanagement plan to bolster the efficiency and safety of the municipality’s transportation network amidst ongoing rural development. 展开更多
关键词 ROAD road assessment road condition traffic assessment level of service GIS
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Mini-review on insulin resistance assessment:Advances in surrogate indices and clinical applications
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作者 Kengo Moriyama 《World Journal of Clinical Cases》 2025年第29期39-52,共14页
Insulin resistance(IR)is widely recognized as a key contributor to metabolic disorders,and various surrogate indices have been developed to estimate IR in clinical and research settings.The hyperinsulinemic-euglycemic... Insulin resistance(IR)is widely recognized as a key contributor to metabolic disorders,and various surrogate indices have been developed to estimate IR in clinical and research settings.The hyperinsulinemic-euglycemic clamp is considered the gold standard method for assessing insulin resistance due to its precision;however,its complexity limits its widespread clinical application.Consequently,surrogate indices derived from fasting and post-load glucose and insulin levels have been developed to estimate IR,facilitating early detection and risk stratification in metabolic disorders.This mini-review discusses the clinical utility,strengths,and limitations of key IR indices,including the homeostasis model assessment of IR,quantitative insulin sensitivity check index,Matsuda index,and triglyceride-glucose index.Overall,the evidence presented to date suggests that these indices provide valuable estimates of IR in various popula-tions.Yet,their applicability varies depending on ethnic background,disease status,and clinical setting.Integrating these indices into routine clinical practice and research could improve metabolic risk assessment and guide preventive interventions.Further investigations are necessary to refine their accuracy and determine optimal cut-off values for various populations. 展开更多
关键词 Insulin resistance Homeostasis model assessment of insulin resistance Quantitative insulin sensitivity check index Matsuda index Triglyceride-glucose index Surrogate markers Metabolic disorders Diabetes Cardiovascular disease Risk assessment
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Performance assessment of computed tomographic angiography fractional flow reserve using deep learning:SMART trial summary
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作者 Wei ZHANG You-Bing YIN +9 位作者 Zhi-Qiang WANG Ying-Xin ZHAO Dong-Mei SHI Yong-He GUO Zhi-Ming ZHOU Zhi-Jian WANG Shi-Wei YANG De-An JIA Li-Xia YANG Yu-Jie ZHOU 《Journal of Geriatric Cardiology》 2025年第9期793-801,共9页
Background Non-invasive computed tomography angiography(CTA)-based fractional flow reserve(CT-FFR)could become a gatekeeper to invasive coronary angiography.Deep learning(DL)-based CT-FFR has shown promise when compar... Background Non-invasive computed tomography angiography(CTA)-based fractional flow reserve(CT-FFR)could become a gatekeeper to invasive coronary angiography.Deep learning(DL)-based CT-FFR has shown promise when compared to invasive FFR.To evaluate the performance of a DL-based CT-FFR technique,DeepVessel FFR(DVFFR).Methods This retrospective study was designed for iScheMia Assessment based on a Retrospective,single-center Trial of CTFFR(SMART).Patients suspected of stable coronary artery disease(CAD)and undergoing both CTA and invasive FFR examinations were consecutively selected from the Beijing Anzhen Hospital between January 1,2016 to December 30,2018.FFR obtained during invasive coronary angiography was used as the reference standard.DVFFR was calculated blindly using a DL-based CTFFR approach that utilized the complete tree structure of the coronary arteries.Results Three hundred and thirty nine patients(60.5±10.0 years and 209 men)and 414 vessels with direct invasive FFR were included in the analysis.At per-vessel level,sensitivity,specificity,accuracy,positive predictive value(PPV)and negative predictive value(NPV)of DVFFR were 94.7%,88.6%,90.8%,82.7%,and 96.7%,respectively.The area under the receiver operating characteristics curve(AUC)was 0.95 for DVFFR and 0.56 for CTA-based assessment with a significant difference(P<0.0001).At patient level,sensitivity,specificity,accuracy,PPV and NPV of DVFFR were 93.8%,88.0%,90.3%,83.0%,and 95.8%,respectively.The computation for DVFFR was fast with the average time of 22.5±1.9 s.Conclusions The results demonstrate that DVFFR was able to evaluate lesion hemodynamic significance accurately and effectively with improved diagnostic performance over CTA alone.Coronary artery disease(CAD)is a critical disease in which coronary artery luminal narrowing may result in myocardial ischemia.Early and effective assessment of myocardial ischemia is essential for optimal treatment planning so as to improve the quality of life and reduce medical costs. 展开更多
关键词 Coronary Artery Disease invasive coronary angiographydeep Diagnostic Performance ischemia assessment fractional flow reserve ct ffr could Deep Learning Ischemia assessment Fractional Flow Reserve
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Research on the Reform of Assessment Methods for Core Courses of the Traffic Engineering Specialty
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作者 Yongming He Lili Zhang Wenhui Zhang 《Journal of Contemporary Educational Research》 2025年第5期34-40,共7页
This paper deeply analyzes the characteristics of core courses of the traffic engineering specialty and the problems existing in traditional assessment methods,and proposes a series of reform measures for the assessme... This paper deeply analyzes the characteristics of core courses of the traffic engineering specialty and the problems existing in traditional assessment methods,and proposes a series of reform measures for the assessment methods of core courses of the traffic engineering specialty.By introducing diversified assessment methods,focusing on process assessment,and strengthening the assessment of practical abilities,the aim is to improve students’learning enthusiasm and initiative,and cultivate students’innovation ability and practical ability to meet the needs of traffic engineering professionals in the new era. 展开更多
关键词 Traffic engineering specialty Core courses Reform of assessment methods Course characteristics Process assessment
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Integrating Environmental Value into Strategic Environmental Assessment:An Empirical Application to a Multipurpose Rural Water Development Project in South Korea
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作者 Hyun No Kim Hwanhee Ryu 《Journal of Environmental & Earth Sciences》 2025年第7期285-298,共14页
This study examines the empirical feasibility of quantitatively integrating environmental value information into Strategic Environmental Assessment(SEA).An analytical framework was established to incorporate environme... This study examines the empirical feasibility of quantitatively integrating environmental value information into Strategic Environmental Assessment(SEA).An analytical framework was established to incorporate environmental cost estimates into the SEA process by utilizing ecosystem service unit values provided by the Environmental Valuation Information System(EVIS),a national platform developed to support the evaluation of policies and projects.The framework was applied to a case study involving a multipurpose rural water development project in South Korea.Ecosystem service losses resulting from the project were quantified using biophysical indicators,such as vegetation biomass,forest area,and hydrological functions,and subsequently monetized through the application of the market price method,replacement cost method,and contingent valuation method.The total annual environmental cost was estimated to be approximately KRW 56.18 billion,with the majority attributable to losses in forest conservation and climate regulation services.These findings demonstrate that quantified environmental data can serve as a robust basis for alternative comparison and site evaluation within SEA.The study provides empirical evidence supporting the advancement of SEA from a predominantly procedural tool focused on environmental protection to a more comprehensive sustainability assessment framework that integrates environmental,economic,and social considerations.Furthermore,the results suggest that EVIS-based quantitative information holds potential for broader application in other national evaluation systems,such as preliminary feasibility studies and regulatory impact assessments. 展开更多
关键词 Environmental Valuation Information System(EVIS) Strategic Environmental assessment(SEA) Sustainability assessment Ecosystem Services Environmental Decision-Making
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Research progress on the environmental risk assessment and remediation technologies of heavy metal pollution in agricultural soil 被引量:9
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作者 Xurui Mai Jing Tang +6 位作者 Juexuan Tang Xinyue Zhu Zhenhao Yang Xi Liu Xiaojie Zhuang Guang Feng Lin Tang 《Journal of Environmental Sciences》 2025年第3期1-20,共20页
Controlling heavy metal pollution in agricultural soil has been a significant challenge.These heavy metals seriously threaten the surrounding ecological environment and human health.The effective assessment and remedi... Controlling heavy metal pollution in agricultural soil has been a significant challenge.These heavy metals seriously threaten the surrounding ecological environment and human health.The effective assessment and remediation of heavy metals in agricultural soils are crucial.These two aspects support each other,forming a close and complete decisionmaking chain.Therefore,this review systematically summarizes the distribution characteristics of soil heavy metal pollution,the correlation between soil and crop heavy metal contents,the presence pattern and migration and transformation mode of heavy metals in the soil-crop system.The advantages and disadvantages of the risk evaluation tools and models of heavy metal pollution in farmland are further outlined,which provides important guidance for an in-depth understanding of the characteristics of heavymetal pollution in farmland soils and the assessment of the environmental risk.Soil remediation strategies involve multiple physical,chemical,biological and even combined technologies,and this paper compares the potential and effect of the above current remediation technologies in heavy metal polluted farmland soils.Finally,the main problems and possible research directions of future heavy metal risk assessment and remediation technologies in agricultural soils are prospected.This review provides new ideas for effective assessment and selection of remediation technologies based on the characterization of soil heavy metals. 展开更多
关键词 Source Migration transformation Risk assessment REMEDIATION Heavy metals Agricultural soils
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Study on Assessment of Mine Environments 被引量:3
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作者 WU Qiang LI Wei LI Ruijun 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2008年第5期1027-1034,共8页
Mine environmental evaluation is the key to mine environmental study. On the basis of the characteristics of the mine environmental problems, they are classified into (1) three wastes problem, (2) ground distortio... Mine environmental evaluation is the key to mine environmental study. On the basis of the characteristics of the mine environmental problems, they are classified into (1) three wastes problem, (2) ground distortion, (3) contradiction among mine drainage, water supply, ecological environment, (4) desertification, and (5) soil erosion. The evaluation is the basis of mine environmental problem classification and investigation, mine environmental rehabilitation, and the information system constructed can be used for subsequent research of evaluation techniques. A synthetic assessment of the 5 kinds of mine environmental problems can be divided into single-factor or multi-factor synthetic assessments; while by the viewpoint of time, the mine environmental assessment can be classified as the historical assessment, the current status assessment and the forecasting assessment. 展开更多
关键词 single-factor assessment multi-factor synthetic assessment historical assessment current status assessment
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Thermal hazard comparison and assessment of Li-ion battery and Na-ion battery 被引量:8
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作者 Wenxin Mei Zhixiang Cheng +5 位作者 Longbao Wang Anqi Teng Zhiyuan Li Kaiqiang Jin Jinhua Sun Qingsong Wang 《Journal of Energy Chemistry》 2025年第3期18-26,共9页
Na-ion batteries are considered a promising next-generation battery alternative to Li-ion batteries,due to the abundant Na resources and low cost.Most efforts focus on developing new materials to enhance energy densit... Na-ion batteries are considered a promising next-generation battery alternative to Li-ion batteries,due to the abundant Na resources and low cost.Most efforts focus on developing new materials to enhance energy density and electrochemical performance to enable it comparable to Li-ion batteries,without considering thermal hazard of Na-ion batteries and comparison with Li-ion batteries.To address this issue,our work comprehensively compares commercial prismatic lithium iron phosphate(LFP) battery,lithium nickel cobalt manganese oxide(NCM523) battery and Na-ion battery of the same size from thermal hazard perspective using Accelerating Rate Calorimeter.The thermal hazard of the three cells is then qualitatively assessed from thermal stability,early warning and thermal runaway severity perspectives by integrating eight characteristic parameters.The Na-ion cell displays comparable thermal stability with LFP while LFP exhibits the lowest thermal runaway hazard and severity.However,the Na-ion cell displays the lowest safety venting temperature and the longest time interval between safety venting and thermal runaway,allowing the generated gas to be released as early as possible and detected in a timely manner,providing sufficient time for early warning.Finally,a database of thermal runaway characteristic temperature for Li-ion and Na-ion cells is collected and processed to delineate four thermal hazard levels for quantitative assessment.Overall,LFP cells exhibit the lowest thermal hazard,followed by the Na-ion cells and NCM523 cells.This work clarifies the thermal hazard discrepancy between the Na-ion cell and prevalent Li-ion cells,providing crucial guidance for development and application of Na-ion cell. 展开更多
关键词 Li-ion battery Na-ion battery Thermal runaway Characteristic parameters Thermal hazard assessment
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Causes and health risk assessment of fluorine in the Red bed groundwater and adjacent geothermal water of the Guang'an Area,Southwest China 被引量:2
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作者 Yu-xiang Shao Wei Zhang +6 位作者 Wen-bin Chen Li Chen Jian Li Guang-long Tian Li-cheng Quan Bu-qingYan Yu-jie Liu 《Journal of Groundwater Science and Engineering》 2025年第2期116-132,共17页
Understanding the levels,causes,and sources of fluoride in groundwater is critical for public health,effective water resource management,and sustainable utilization.This study employs multivariate statistical methods,... Understanding the levels,causes,and sources of fluoride in groundwater is critical for public health,effective water resource management,and sustainable utilization.This study employs multivariate statistical methods,hazard quotient assessment,and geochemical analyses,such as mineral saturation index,ionic activities,and Gibbs diagrams,to investigate the hydrochemical characteristics,causes,and noncarcinogenic risks of fluoride in Red bed groundwater and geothermal water in the Guang'an area and neighboring regions.Approximately 9%of the Red bed groundwater samples contain fluoride concentrations exceeding 1 mg·L^(-1).The predominant water types identified are Cl-Na and HCO_(3)-Na,primarily influenced by evapotranspiration.Low-fluoride groundwater and high-fluoride geothermal water exhibit distinct hydrochemical types HCO_(3)-Ca and SO_(4)-Ca,respectively,which are mainly related to the weathering of carbonate,sulfate,and fluorite-containing rocks.Correlation analysis reveals that fluoride content in Red bed groundwater is positively associated with Na^(+),Cl^(-),SO_(4)^(2-),and TDS(r^(2)=0.45-0.64,p<0.01),while in geothermal water,it correlates strongly with pH,K^(+),Ca^(2+),and Mg^(2+)(r^(2)=0.52-0.80,p<0.05).Mineral saturation indices and ionic activities indicate that ion exchange processes and the dissolution of minerals such as carbonatite and fluorite are important sources of fluoride in groundwater.The enrichment of fluorine in the Red bed groundwater is linked to evaporation,cation exchange and dissolution of fluorite,caused by the lithologic characteristics of the red bed in this area.However,it exhibits minimal correlation with the geothermal water in the adjacent area.The noncarcinogenic health risk assessment indicates that 7%(n=5)of Red bed groundwater points exceed the fluoride safety limit for adults,while 12%(n=8)exceed the limit for children.These findings underscore the importance of avoiding highly fluoridated red bed groundwater as a direct drinking source and enhancing groundwater monitoring to mitigate health risks associated with elevated fluoride levels. 展开更多
关键词 Guang'an area Red bed groundwater Geothermal water Fluoride contamination CAUSES Health risk assessment
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Occurrence of phthalate esters in the yellow and Yangtze rivers of china:Risk assessment and source apportionment 被引量:2
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作者 Qinkui Miao Wenxiang Ji +1 位作者 Huiyu Dong Ying Zhang 《Journal of Environmental Sciences》 2025年第3期628-637,共10页
Phthalate esters(PAEs),recognized as endocrine disruptors,are released into the environment during usage,thereby exerting adverse ecological effects.This study investigates the occurrence,sources,and risk assessment o... Phthalate esters(PAEs),recognized as endocrine disruptors,are released into the environment during usage,thereby exerting adverse ecological effects.This study investigates the occurrence,sources,and risk assessment of PAEs in surface water obtained from 36 sampling points within the Yellow River and Yangtze River basins.The total concentration of PAEs in the Yellow River spans from124.5 to 836.5 ng/L,with Dimethyl phthalate(DMP)(75.4±102.7 ng/L)and Diisobutyl phthalate(DiBP)(263.4±103.1 ng/L)emerging as the predominant types.Concentrations exhibit a pattern of upstream(512.9±202.1 ng/L)>midstream(344.5±135.3 ng/L)>downstream(177.8±46.7 ng/L).In the Yangtze River,the total concentration ranges from 81.9 to 441.6 ng/L,with DMP(46.1±23.4 ng/L),Diethyl phthalate(DEP)(93.3±45.2 ng/L),and DiBP(174.2±67.6 ng/L)as the primary components.Concentration levels follow a midstream(324.8±107.3 ng/L)>upstream(200.8±51.8 ng/L)>downstream(165.8±71.6 ng/L)pattern.Attention should be directed towards the moderate ecological risks of DiBP in the upstream of HH,and both the upstream and midstream of CJ need consideration for the moderate ecological risks associated with Di-n-octyl phthalate(DNOP).Conversely,in other regions,the associated risk with PAEs is either low or negligible.The main source of PAEs in Yellow River is attributed to the release of construction land,while in the Yangtze River Basin,it stems from the accumulation of pollutants in lakes and forests discharged into the river.These findings are instrumental for pinpointing sources of PAEs pollution and formulating control strategies in the Yellow and Yangtze Rivers,providing valuable insights for global PAEs research in other major rivers. 展开更多
关键词 PHTHALATES Spatial variation Potential sources Risk assessment
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