期刊文献+
共找到29篇文章
< 1 2 >
每页显示 20 50 100
A Review of the Antecedents and Consequences of Digital Maturity
1
作者 Yan Xiang Yiyuan Zhang +1 位作者 Pengbin Gao Zhou Zhang 《管理科学与研究(中英文版)》 2021年第1期62-67,共6页
Digital maturity has become a hot topic in various fields.This paper aims to provide an integrative review of digital maturity.This paper summarizes the concept of digital maturity from the perspectives of process,deg... Digital maturity has become a hot topic in various fields.This paper aims to provide an integrative review of digital maturity.This paper summarizes the concept of digital maturity from the perspectives of process,degree and ability.Four categories of antecedents,namely,strategic,cultural,talent and others are gathered.Performance and Non-performance consequences are analyzed.Finally,combining the results of digital maturity,it discusses the current research shortage of digital maturity and prospects for the future research direction.The analysis of antecedents and consequences of digital maturity can provide an integrative framework of existing research on digital maturity,and also provide some reference for the research of related research. 展开更多
关键词 Digital Maturity CONCEPT antecedents Consequences
下载PDF
Extension of Switching Costs Antecedents Based on Customers' Social Ties
2
作者 SHI Wenhua JI Chen +2 位作者 LI Xiaowen TANG Lingshu LV Tingjie 《China Communications》 SCIE CSCD 2014年第1期152-163,共12页
The effects of customers' social ties on switching costs have recently attracted researchers' attention.This study formally included customers' social ties as a new antecedent to supplement those elucidate... The effects of customers' social ties on switching costs have recently attracted researchers' attention.This study formally included customers' social ties as a new antecedent to supplement those elucidated by Burnham in 2003.Through empirical research,this study successfully verified the reliability and validity of items created to measure social ties,and it demonstrated the facilitating effects of social ties as an antecedent on customers' procedural and relational switching costs.Finally,the study lists managerial implications aimed at retaining customers through knowledge of this added antecedent. 展开更多
关键词 Switching costs ANTECEDENT social ties
下载PDF
The influence of different types of satisfaction on loyalty on C2C online shopping platform:From the perspective of sellers and the platform
3
作者 Yanan Lu Qian Huang Yuting Wang 《中国科学技术大学学报》 CAS CSCD 北大核心 2024年第5期36-48,I0007,共14页
With the rise and development of major types of platforms,the competition for resources has become extremely fierce,and the market share of C2C platforms has been seriously threatened by the loss of resources.Therefor... With the rise and development of major types of platforms,the competition for resources has become extremely fierce,and the market share of C2C platforms has been seriously threatened by the loss of resources.Therefore,building and maintaining buyers’satisfaction and loyalty to C2C platforms is critical to the survival and sustainability of C2C platforms in China.However,the current knowledge on how platform satisfaction and loyalty are constructed in the C2C e-commerce environment is incomplete.In this study,seller-based satisfaction and platform-based satisfaction are constructed separately.We further distinguish seller-based transaction satisfaction into economic and social satisfaction and explore their antecedents and consequences.To test our research hypotheses,we conduct a survey and collect data from a real online market(Taobao website).The results show that seller-based transaction satisfaction positively affects platform-based overall satisfaction and loyalty,and that perceived product quality,perceived assurance,and perceived price fairness all have a significant effect on economic satisfaction,whereas perceived relationship quality and perceived empathy significantly influence social satisfaction.These findings help us understand the literature related to customer satisfaction in the context of C2C in China and provide inspiration for online sellers and platforms. 展开更多
关键词 transaction-specific satisfaction social and economic satisfaction various antecedents of satisfaction overall satisfaction C2C online shopping platform
下载PDF
Mediating role of brand app trust in the relationship between antecedents and purchase intentions-Iranian B2C mobile apps 被引量:1
4
作者 Mohammad Mahdi Movahedisaveji Badiea Shaukat 《Journal of Management Analytics》 EI 2020年第1期69-104,共36页
This study investigates the mediating role of brand app trust in the relationship between brand app antecedents and purchase intentions via a brand mobile app.It explores the mediating potential of brand and platform ... This study investigates the mediating role of brand app trust in the relationship between brand app antecedents and purchase intentions via a brand mobile app.It explores the mediating potential of brand and platform trust in this relationship between antecedents and purchase intentions and also highlights which brand antecedents are useful for directly or indirectly establishing trust towards purchasing via a mobile app in the Iranian mobile commerce market.This study uses survey data collected through an online questionnaire form and applies the partial least squares method to extract its findings.All of the estimation results are found to be unbiased and robust.The results show that brand app trust plays a mediating role in the relationship between the brand app antecedents of word-of-mouth recommendation,subjective norms,perceived image(social antecedents),mobile computing self-efficacy(consumer-based antecedent),and perceived ease of use(system antecedent)and purchase intentions via a brand mobile app in Iran. 展开更多
关键词 brand app antecedents brand trust brand app trust platform trust purchasing intention via mobile app social commerce Iran
原文传递
Geomorphological evidence inconvenient for the antecedent rivers of the Arun and Tista across the Himalayan range
5
作者 NAKATA Takashi KUMAHARA Yasuhiro +1 位作者 NAIK Sambit Prasanajit SAKAI Harutaka 《Journal of Mountain Science》 SCIE CSCD 2024年第9期3001-3017,共17页
The Arun and Tista Rivers,which flow across the Himalayas,are commonly known as antecedent valleys that overcame the rapid uplift of the Higher Himalayan ranges.To clarify whether the idea of antecedent rivers is acce... The Arun and Tista Rivers,which flow across the Himalayas,are commonly known as antecedent valleys that overcame the rapid uplift of the Higher Himalayan ranges.To clarify whether the idea of antecedent rivers is acceptable,we investigated the geomorphology of the Himalayas between eastern Nepal and Bhutan Himalayas.The southern part of Tibetan Plateau,extending across the Himalayas as tectonically un-deformed glaciated terrain named as'Tibetan Corridor,'does not suggest the regional uplift of the Higher Himalayas.The 8,000-m class mountains of Everest,Makalu,and Kanchenjunga are isolated residual peaks on the glaciated terrain composed of mountain peaks of 4,000–6,000 m high.The Tibetan glaciers commonly beheaded by Himalayan glaciers along the great watershed of the Himalayas suggest the expansion of Himalayan river drainage by glaciation.For the narrow upstream regions of the Arun and Tista Rivers with less precipitation behind the range,it is hard to collect enough water for the power of down-cutting their channels against the uplifting Himalayas.The fission track ages of the Higher Himalayan Crystalline Nappe suggest that the Himalayas attained their present altitude by 11–10 Ma,and the Arun and Tista Rivers formed deep gorges across the Himalayas by headward erosion. 展开更多
关键词 HIMALAYA Antecedent river GEOMORPHOLOGY AW3D30 DSM Glacier piracy
下载PDF
Evaluation of rainfall threshold models for debris flow initiation in the Jiangjia Gully,Yunnan Province,China
6
作者 YANG Hongjuan ZHANG Shaojie +2 位作者 HU Kaiheng WEI Fangqiang LIU Yanhui 《Journal of Mountain Science》 SCIE CSCD 2024年第6期1799-1813,共15页
Systematically determining the discriminatory power of various rainfall properties and their combinations in identifying debris flow occurrence is crucial for early warning systems.In this study,we evaluated the discr... Systematically determining the discriminatory power of various rainfall properties and their combinations in identifying debris flow occurrence is crucial for early warning systems.In this study,we evaluated the discriminatory power of different univariate and multivariate rainfall threshold models in identifying triggering conditions of debris flow in the Jiangjia Gully,Yunnan Province,China.The univariate models used single rainfall properties as indicators,including total rainfall(R_(tot)),rainfall duration(D),mean intensity(I_(mean)),absolute energy(Eabs),storm kinetic energy(E_(s)),antecedent rainfall(R_(a)),and maximum rainfall intensity over various durations(I_(max_dur)).The evaluation reveals that the I_(max_dur)and Eabs models have the best performance,followed by the E_(s),R_(tot),and I_(mean)models,while the D and R_(a)models have poor performances.Specifically,the I_(max_dur)model has the highest performance metrics at a 40-min duration.We used logistic regression to combine at least two rainfall properties to establish multivariate threshold models.The results show that adding D or R_(a)to the models dominated by Eabs,E_(s),R_(tot),or I_(mean)generally improve their performances,specifically when D is combined with I_(mean)or when R_(a)is combined with Eabs or E_(s).Including R_(a)in the I_(max_dur)model,it performs better than the univariate I_(max_dur)model.A power-law relationship between I_(max_dur)and R_(a)or between Eabs and R_(a)has better performance than the traditional I_(mean)–D model,while the performance of the E_(s)–R_(a)model is moderate.Our evaluation reemphasizes the important role of the maximum intensity over short durations in debris flow occurrence.It also highlights the importance of systematically investigating the role of R_(a)in establishing rainfall thresholds for triggering debris flow.Given the regional variations in rainfall patterns worldwide,it is necessary to evaluate the findings of this study across diverse watersheds. 展开更多
关键词 Rainfall threshold Logistic regression Maximum rainfall intensity Absolute energy Antecedent rainfall
下载PDF
Antecedent Precipitation Index to Estimate Soil Moisture and Correlate as a Triggering Process in the Occurrence of Landslides
7
作者 Marcio Augusto Ernesto De Moraes Walter Manoel Mendes Filho +6 位作者 Rodolfo Moreda Mendes Cassiano Antonio Bortolozo Daniel Metodiev Marcio Roberto Magalhães De Andrade Harideva Marturano Egas Tatiana Sussel Gonçalves Mendes Luana Albertani Pampuch 《International Journal of Geosciences》 CAS 2024年第1期70-86,共17页
Landslides are highly dangerous phenomena that occur in different parts of the world and pose significant threats to human populations. Intense rainfall events are the main triggering process for landslides in urbaniz... Landslides are highly dangerous phenomena that occur in different parts of the world and pose significant threats to human populations. Intense rainfall events are the main triggering process for landslides in urbanized slope regions, especially those considered high-risk areas. Various other factors contribute to the process;thus, it is essential to analyze the causes of such incidents in all possible ways. Soil moisture plays a critical role in the Earth’s surface-atmosphere interaction systems;hence, measurements and their estimations are crucial for understanding all processes involved in the water balance, especially those related to landslides. Soil moisture can be estimated from in-situ measurements using different sensors and techniques, satellite remote sensing, hydrological modeling, and indicators to index moisture conditions. Antecedent soil moisture can significantly impact runoff for the same rainfall event in a watershed. The Antecedent Precipitation Index (API) or “retained rainfall,” along with the antecedent moisture condition from the Natural Resources Conservation Service, is generally applied to estimate runoff in watersheds where data is limited or unavailable. This work aims to explore API in estimating soil moisture and establish thresholds based on landslide occurrences. The estimated soil moisture will be compared and calibrated using measurements obtained through multisensor capacitance probes installed in a high-risk area located in the mountainous region of Campos do Jordão municipality, São Paulo, Brazil. The API used in the calculation has been modified, where the recession coefficient depends on air temperature variability as well as the climatological mean temperature, which can be considered as losses in the water balance due to evapotranspiration. Once the API is calibrated, it will be used to extrapolate to the entire watershed and consequently estimate soil moisture. By utilizing recorded mass movements and comparing them with API and soil moisture, it will be possible to determine thresholds, thus enabling anticipation of landslide occurrences. 展开更多
关键词 LANDSLIDES Antecedent Precipitation Index Soil Moisture Threshold Water Balance
下载PDF
Relationship mapping of consumer buying behavior antecedents of secondhand clothing with fuzzy DEMATEL
8
作者 Maria Esther F.Medalla Kafferine D.Yamagishi +7 位作者 Ann Myril C.Tiu Reciel Ann B.Tanaid Dharyll Prince M.Abellana Shirley Ann A.Caballes Eula Margareth Y.Jabilles Egberto F.Selerio,Jr. Miriam F.Bongo Lanndon A.Ocampo 《Journal of Management Analytics》 EI 2021年第3期530-568,共39页
This paper aims to identify the antecedents of buying behavior for secondhand clothing among millennials,as well as to determine their underlying causal relationships.Upon a comprehensive literature search,a total of ... This paper aims to identify the antecedents of buying behavior for secondhand clothing among millennials,as well as to determine their underlying causal relationships.Upon a comprehensive literature search,a total of 18 antecedents were found,and these are categorized into three motives,namely,economic,hedonic and recreational,and critical.As a case study in the Philippines,a focus group discussion among experts who are active millennial secondhand clothing users and buyers were tasked to identify the antecedents they have experienced and further confirm those extracted from the literature.To establish the causal relationships of these antecedents,categorize them into net causes or net effects,and address the vagueness associated with the decision-making process,a fuzzy DEMATEL method is used.Results reveal that avoidance of conventional channels proves to be the antecedent providing the highest impact among all other antecedents.Uniqueness,high quality,and fashion trend found to be the antecedents with the highest impacts received,making them the major net effects.Findings from this work hope to provide a framework among practitioners that would lead to a better understanding of millennials’buying behavior for secondhand clothing. 展开更多
关键词 MILLENNIALS consumer buying behavior antecedents secondhand clothing fuzzy DEMATEL
原文传递
Cognitive frailty in the elderly:a concept analysis
9
作者 Yi-Yin Hu Ronnell D.Dela Rosa 《Frontiers of Nursing》 2023年第4期393-398,共6页
Frailty is a recession of age-related reserves caused by a variety of causes and is becoming the most important clinical syndrome that affects the health of the elderly.In the elderly,frailty and cognitive dysfunction... Frailty is a recession of age-related reserves caused by a variety of causes and is becoming the most important clinical syndrome that affects the health of the elderly.In the elderly,frailty and cognitive dysfunction often exist,and some people have proposed cognitive frailty.Cognitive frailty is an elderly syndrome that increases the risk of dementia,in the same time,and can independently predict the adverse health outcomes of the patient and affect the quality of the patient's survival.This paper,under the guidance of Walker and Avant method,provides theoretical basis for early recognition and intervention of cognitive weakness in the elderly. 展开更多
关键词 antecedents COGNITION concept analysis consequences defining attributes empirical referents FRAILTY
下载PDF
Climate Variability & Establishment of Rainfall Threshold Line for Landslide Hazards in Rangamati, Bangladesh
10
作者 Mahmuda Khatun Abu Taher Mohammad Shakhawat Hossain Hossain Md. Sayem 《Open Journal of Geology》 2023年第9期959-979,共21页
This study aims to evaluate the impact of extreme rainfall events on landslides under current and past climate scenarios. Rainfall-triggered landslides are analyzed by rainfall estimates, derived using statistics of e... This study aims to evaluate the impact of extreme rainfall events on landslides under current and past climate scenarios. Rainfall-triggered landslides are analyzed by rainfall estimates, derived using statistics of events. It is established that recent climate changes, mainly temperature and rainfall patterns have significantly increased the rainfall-induced landslide hazards in the Rangamati district, Bangladesh. It is also observed that the temperature and rainfall of Rangamati had increased gradually during the last 40 years (1981-2021). On 13 June 2017, a series of landslides triggered by heavy monsoon rains (300 mm/24 h) occurred and killed more than 112 people in the Rangamati hill district, Bangladesh. The highest annual decade rainfall is 3816 mm, recorded in 2010-21. A relationship between causalities and the number of events has also been established. The analysis shows that both antecedent and single-day major rainfall patterns can influence sliding events. It is established that monsoonal rainfall (June-September) can significantly influence catastrophic landslide hazard events. Finally, two rainfall threshold lines for the researched area are constructed based on antecedent and single-day major rainfall occurrences, as well as the number of fatalities caused by landslides. Total rainfall of 100 mm (16.66 mm/day) during six days appears to define the minimum rainfall that has led to shallow landslides/slope failures, while 210 mm (35 mm/day) within six days appears to define the lowest rainfall that could be a cause of catastrophic landslide in Rangamati district. 展开更多
关键词 Climate Change Antecedent Rainfall Rainfall Threshold Catastrophic and Landslide
下载PDF
Marked Increases in Background Photon Emissions in Sudbury Ontario More than One Week before the Magnitude >8.0 Earthquakes in Japan and Chile 被引量:4
11
作者 Michael A. Persinger Ghislaine F. Lafreniere Blake T. Dotta 《International Journal of Geosciences》 2012年第3期627-629,共3页
Daily, minute-to-minute measurements of ground level photon emissions in Sudbury, Ontario Canada displayed conspicuous increases more than one week before the 2011 M9.0 earthquake in Japan and the 2010 M8.8 earthquake... Daily, minute-to-minute measurements of ground level photon emissions in Sudbury, Ontario Canada displayed conspicuous increases more than one week before the 2011 M9.0 earthquake in Japan and the 2010 M8.8 earthquake in Chile. Temporal profiles of the antecedent increase and subsequent decline in power densities for the two events were remarkably similar. Antecedent changes for 7.0 8.0) seismic events anywhere on the planet. 展开更多
关键词 Photon Emissions Seismic Events Earthquake antecedents
下载PDF
A meta-analytic review of Elliot's (1999) Hierarchical Model of Approach and Avoidance Motivation in the sport, physical activity, and physical education literature
12
作者 Marc Lochbaum Javan Jean-Noel +1 位作者 Colleen Pinar Todd Gilson 《Journal of Sport and Health Science》 SCIE 2017年第1期68-80,共13页
Purpose: The purpose of this quantitative review was to summarize the state of Elliot's Hierarchical Model of Approach and Avoidance Motivation, specifically the antecedents of the 2 × 2 achievement goals in ... Purpose: The purpose of this quantitative review was to summarize the state of Elliot's Hierarchical Model of Approach and Avoidance Motivation, specifically the antecedents of the 2 × 2 achievement goals in the sport, physical activity, and physical education literature. In addition,the intercorrelations amongst the 2 × 2 goals were also examined.Methods: A systematic review of the literature was conducted. Meta-analytic procedures were used with the mean weighted sample correlation(rw) as the effect size metric. The antecedents were coded by Elliot's(1999) antecedent categories. A number of moderators were coded a priori.Results: Based on a fixed effects model from 47 published studies(total unique n = 15,413) that met inclusion criteria, the 2 × 2 achievement goals were significantly correlated amongst each other ranging from small to medium to large in meaningfulness. Concerning the antecedents, overall they were theoretically correct in associations, but only a few of the relationships were medium in meaningfulness. Most relationships were small in meaningfulness. Heterogeneity was present for the interrcorrelation and antecedent analyses.Conclusion: Future research is encouraged to grow and enrich the understanding of achievement goals within Elliot's complete Hierarchical Model of Approach and Avoidance Motivation to include both antecedents and outcomes simultaneously to improve upon the understanding of achievement motivation in sport, exercise, and physical activity settings. 展开更多
关键词 Achievement motivation antecedents COMPETENCE Mastery goals Meta-analysis Performance goals
下载PDF
Anxiety: a concept analysis
13
作者 Yuan Xi 《Frontiers of Nursing》 CAS 2020年第1期9-12,共4页
Anxiety is often mentioned in people's daily life,especially in the field of medicine and psychology.For nursing,a clear understanding of anxiety is conducive to clinical nursing practice and research.Under the gu... Anxiety is often mentioned in people's daily life,especially in the field of medicine and psychology.For nursing,a clear understanding of anxiety is conducive to clinical nursing practice and research.Under the guidance of the Walker and Avant method,this article conducts a concept analysis of anxiety that provides a comprehensive and rounded analysis of anxiety and helps nurses gain a better understanding of anxiety. 展开更多
关键词 ANXIETY CONCEPT ANALYSIS defining attributes antecedents consequences empirical referents
下载PDF
Goal Self-Concordance Model: What HaveWe Learned and Where are We Going
14
作者 Peng Wan Ting Wen +2 位作者 Yunfei Zhang Hong Gao Jigan Wang 《International Journal of Mental Health Promotion》 2021年第2期201-219,共19页
Goal self-concordance reflects self-generated personal goals aligning with people’s interests and core values in one’s implicit personality as organic components,which is measured by the“perceived locus of causalit... Goal self-concordance reflects self-generated personal goals aligning with people’s interests and core values in one’s implicit personality as organic components,which is measured by the“perceived locus of causality”PLOC.Pursuing and achieving self-concordant goals both predict diversified outcomes in need-satisfaction,mental and physical well-being,positive attitude and behavior,etc.Based on expounding and sorting out the concept and measurement about goal self-concordance,the author analyzes the differences among a series of goal self-concor-dance theories.This paper focuses on the latest research trends and summarizesfive influencing aspects of goal self-concordance:mental health,cognition,emotion,personal will,and behavioral outcomes.The mediating effects are discussed concerning antecedents and influence effects,the influence effects are shown in three aspects including the characteristics of individual,target,and environment.While the antecedent effects are respectively reflected in self-insight,personality,empowerment,and self-supported environment,content,and context of the goal itself.Finally,the author proposes several potential research interests from a broader perspective based on the current literature. 展开更多
关键词 Goal self-concordance concept measurement antecedents and consequences(research status) future research prospects
下载PDF
Influencing Factors and the Effect of Organizational Capabilities on Internationalization Strategies for German SMEs in the MedTech Industry
15
作者 Gunther Heiss 《Management Studies》 2017年第4期263-277,共15页
This paper is focusing on SME internationalization and investigates the antecedents and the effects of organizational capabilities on strategy in the German MedTech industry. However, the impact of existing research i... This paper is focusing on SME internationalization and investigates the antecedents and the effects of organizational capabilities on strategy in the German MedTech industry. However, the impact of existing research in this field is relatively poor and is not yet applicable in other countries or industries. As a consequence, a systematic review of the literature has been conducted. The results have shown heterogeneous research outcomes in the field of strategy and the need for further research in this context. Overall, the review indicates an initial conceptual model that has been developed, in which significant fmdings could be identified and refmed in a country-, industry- or firm-specific way. The results will serve as a strategic input for SME's in the German MedTech industry. 展开更多
关键词 INTERNATIONALIZATION SMES MedTech antecedents organizational capabilities
下载PDF
Knowledge Transfer and Management Consulting:The Effect of Consultant and Client Characteristics
16
作者 Noha A.Alaa El Dine Ahmed Taher 《Management Studies》 2020年第3期215-231,共17页
Knowledge transfer(KT)from the consultant to the client is an important area that needs to be repeatedly addressed and thoroughly understood.The aim of this research was to examine the assumption that client character... Knowledge transfer(KT)from the consultant to the client is an important area that needs to be repeatedly addressed and thoroughly understood.The aim of this research was to examine the assumption that client characteristics and consultant competencies play a defining role in the effective transfer of knowledge to the client party.The authors examined the critical aspects and competencies required of the consultant,and the characteristics and attitudes required of the client,which would contribute to a successful transfer of knowledge,through unstructured in-depth interviews and concise questionnaires.Eighty consulting assignments were studied from both the client side and the consultant side.A conceptual model is presented,factor analysis was used to validate the constructs,and partial least squares were used to test the model.The findings showed that the consultants’professionalism,skills,and behavior were significant contributors to KT to the client.Surprisingly,neither the consultant knowledge nor client characteristics had any significance to the KT to the client. 展开更多
关键词 knowledge transfer(KT) antecedents and consequences consultant-client relationship management consulting
下载PDF
浅析英语定语从句汉译方法
17
作者 郭征难 《神州》 2013年第29期152-152,155,共2页
The attributive clause is a common sentencetype in English.Its position is very flexible. The way of translation the at-tributive clause is involved with the restrictive clause and the non-restrictive clause.In common... The attributive clause is a common sentencetype in English.Its position is very flexible. The way of translation the at-tributive clause is involved with the restrictive clause and the non-restrictive clause.In common translation practice,it must be analyzed concretely according to different cases. 展开更多
关键词 the RESTRICTIVE attributive CLAUSE the non-restrictive attributive CLAUSE ANTECEDENT WORD
下载PDF
Debris Flow Warning Threshold Based on Antecedent Rainfall:a Case Study in Jiangjia Ravine,Yunnan,China 被引量:10
18
作者 GUO Xiao-jun CUI Peng LI Yong 《Journal of Mountain Science》 SCIE CSCD 2013年第2期305-314,共10页
Debris flows in Jiangjia Ravine in Yunnan province, China are not only triggered by intense storms but also by short-duration and low-intensity rainfalls. This reflects the significance of antecedent rainfall. This pa... Debris flows in Jiangjia Ravine in Yunnan province, China are not only triggered by intense storms but also by short-duration and low-intensity rainfalls. This reflects the significance of antecedent rainfall. This paper tries to find the debris flow- triggering threshold by considering antecedent rainfall through a case study in Jiangjia Ravine. From 23 debris flow events, the I-D (Intensity-Duration) threshold was found, which is very dose to the line of 95th percentile regression line of rainfall events, representing that 95% of rainfalls can potentially induce debris flows and reflects the limitation of I-D threshold application in this area. Taking into account the effect of antecedent rainfall, the debris flowtriggering threshold for rainfall quantity and intensity is statistically and empirically derived. The relationships can be used in debris flow warning system as key thresholds. Coupling with the rainfall characteristics in this area, new thresholds are proposed as triggering and warning thresholds. 展开更多
关键词 I-D threshold debris flow warningsystem antecedent rainfall Jiangjia Ravine
下载PDF
Assessment of Soil Water Content in Field with Antecedent Precipitation Index and Groundwater Depth in the Yangtze River Estuary 被引量:5
19
作者 XIE Wen-ping YANG Jing-song 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2013年第4期711-722,共12页
To better understand soil moisture dynamics in the Yangtze River Estuary (YRE) and predict its variation in a simple way, a field monitoring experiment was carried out along the north branch of the Yangtze River, wh... To better understand soil moisture dynamics in the Yangtze River Estuary (YRE) and predict its variation in a simple way, a field monitoring experiment was carried out along the north branch of the Yangtze River, where seawater intrusion was strong and salt-water variation is one of the limiting factors of local agriculture. In present paper, relation between antecedent precipitation index (API) and soil water content is studied, and effects of groundwater depth on soil water content was analyzed. A relatively accurate prediction result of soil water content was reached using a neural network model. The impact analysis result showed that the variation of the API was consistent with soil water content and it displayed significant correlations with soil water content in both 20 and 50 cm soil layer, and higher correlation was observed in the layer of 20 cm. Groundwater impact analysis suggested that soil moisture was affected by the depth of groundwater, and was affected more greatly by groundwater at depth of 50 cm than that at 20 cm layer. By introducing API, groundwater depth and temperature together, a BP artificial network model was established to predict soil water content and an acceptable agreement was achieved. The model can be used for supplementing monitoring data of soil water content and predicting soil water content in shallow groundwater areas, and can provide favorable support for the research of water and salt transport in estuary area. 展开更多
关键词 antecedent precipitation index groundwater depth soil water content ASSESSMENT
下载PDF
Probabilistic Properties of a Curve Number:A Case Study for Small Polish and Slovak Carpathian Basins 被引量:1
20
作者 Agnieszka RUTKOWSKA Silvia KOHNOVá +2 位作者 Kazimierz BANASIK Ján SZOLGAY Beata KARABOVá 《Journal of Mountain Science》 SCIE CSCD 2015年第3期533-548,共16页
The proper determination of the curve number (CN) in the SCS-CN method reduces errors in predicting runoff volume. In this paper the variability of CN was studied for 5 Slovak and S Polish Carpathian catchments. Emp... The proper determination of the curve number (CN) in the SCS-CN method reduces errors in predicting runoff volume. In this paper the variability of CN was studied for 5 Slovak and S Polish Carpathian catchments. Empirical curve numbers were applied to the distribution fitting. Next, theoretical characteristics of CN were estimated. For loo-CN the Generalized Extreme Value (GEV) distribution was identified as the best fit in most of the catchments. An assessment of the differences between the characteristics estimated from theoretical distributions and the tabulated values of CN was performed. The comparison between the antecedent runoff conditions (ARC) of Hawkins and Hjelmfelt was also completed. The analysis was done for various magnitudes of rainfall. Confidence intervals (CI) were helpful in this evaluation. The studies revealed discordances between the tabulated and estimated CNs. The tabulated CNs were usually lower than estimated values; therefore, an application of the median value and the probabilistic ARC of Hjelmfelt for wet runoff conditions is advisable. For dry conditions the ARC of Hjelmfelt usually better estimated CN than ARC of Hawkins did, but in several catchments neither the ARC of Hawkins nor Hjelmfelt sufficiently depicted the variability in CN. 展开更多
关键词 Curve number Theoretical distribution Antecedent runoff eonditions
下载PDF
上一页 1 2 下一页 到第
使用帮助 返回顶部