Acta Geodynamica et Geomaterialia最新文献_第2页

Integrated analysis of geophysical methods for landslide characterization 综合分析滑坡特征的地球物理方法

IF 0.9 4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-12-12 DOI: 10.13168/agg.2023.0015

Muhammad Taqiuddin Zakaria

引用次数: 0

An improved DFVMD-LSTM hybrid time series model for predicting total solar irradiance 一种改进的DFVMD-LSTM混合时间序列模型预测太阳总辐照度

4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-10-26 DOI: 10.13168/agg.2023.0013

Hongkang Chen

引用次数: 0

Surface waves as a cost-effective tool for enhancing the interpretation of shallow refraction seismic data 表面波是提高浅层折射地震资料解释的一种经济有效的工具

4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-09-30 DOI: 10.13168/agg.2023.0012

Martin Mazanec

引用次数: 0

Monitoring terrestrial water storage changes and drought in Jiangxi Province using GRACE and GRACE Follow-on data 利用GRACE和GRACE Follow-on数据监测江西省陆地储水量变化和干旱

4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-09-22 DOI: 10.13168/agg.2023.0011

Changmin Huan

引用次数: 0

Could long glaciers have been extended in the Bohemian Forest? Geophysical insight from Groer Rachel region 波西米亚森林里的冰川会延伸很久吗?来自Groer Rachel地区的地球物理洞察

IF 0.9 4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-09-05 DOI: 10.13168/agg.2023.0010

Daniel Papez

引用次数: 0

Resilient modulus of soil using for subgrade of pavement: A case study in Vietnam 用于路面路基的土壤弹性模量:越南案例研究

IF 0.9 4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-08-08 DOI: 10.13168/agg.2023.0009

T. Pham

{"title":"Resilient modulus of soil using for subgrade of pavement: A case study in Vietnam","authors":"T. Pham","doi":"10.13168/agg.2023.0009","DOIUrl":"https://doi.org/10.13168/agg.2023.0009","url":null,"abstract":"Resilient modulus (Mr) is one of the crucial parameters, which is used for the design of a multi-layer pavement system. The Mr is defined as a ratio between deviatoric cyclic axial stress to the recoverable axial strain. In general, the Mr is measured through the cyclic triaxial compression test. Besides, other tests such as light weight deflectometer (LWD) and dynamic cone penetrometer (DCP) were also employed to calculate the Mr of subgrade soil. In this study, two types of soil in Vietnam were taken and used for determining the Mr in the laboratory. Two field tests (i.e LWD and DCP) were also implemented for comparison. The results of this study show that the Mr of soil was positively related to compaction degree and confining pressure regardless of soil type. However, the changes of the Mrs under different deviator stresses varied with the type of subgrade soil. The Mr increased with the greater deviator stress for the two types of soil. Furthermore, the field LWD testing method can be effectively utilized to determine the resilient moduli of soil samples tested under similar conditions with a high level of accuracy. Finally, it was found that the dynamic penetration index has a good relationship with the dynamic deformation modulus. This correlation may thus yield a satisfactory estimation with an appropriate coefficient of determination.","PeriodicalId":50899,"journal":{"name":"Acta Geodynamica et Geomaterialia","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44528854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Delineating structure elements and depth of sources using an aeromagnetic data set in the Tarhona region, Nortwest Libya 使用航空磁测数据集描绘利比亚北部塔霍纳地区的结构元素和震源深度

IF 0.9 4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-07-20 DOI: 10.13168/agg.2023.0008

Fouzie Trepil

引用次数: 0

A decorrelation filter based on the full error covariance of GRACE gravity field solutions 基于GRACE重力场解全误差协方差的去相关滤波器

IF 0.9 4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-06-27 DOI: 10.13168/agg.2023.0005

Xiaolei Ju

引用次数: 0

A new adaptive WVS based denoising method on GNSS vertical time series 一种新的基于WVS的GNSS垂直时间序列自适应去噪方法

IF 0.9 4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-06-26 DOI: 10.13168/agg.2023.0007

Zheng Huang

{"title":"A new adaptive WVS based denoising method on GNSS vertical time series","authors":"Zheng Huang","doi":"10.13168/agg.2023.0007","DOIUrl":"https://doi.org/10.13168/agg.2023.0007","url":null,"abstract":"Improper selection of modal decomposition numbers and penalty factors in Variational Modal Decomposition (VMD) can result in over-decomposition and under-decomposition issues, impacting the analysis of high-precision Global Navigation Satellite System (GNSS) time series for geodynamics and geophysics research purposes. This work shows a new WOA-VMD-SSA (WVS) denoising method combining Whale Optimization Algorithm (WOA) and the VMD together with the Singular Spectrum Analysis (SSA) method. Simulated data comprising a combination of Flicker noise plus White noise (FN+WN) and General Gauss-Markov plus White noise (GGM+WN) were utilized in our experiments. That the simulation results show that WVS root mean square error (RMSE) decreased by 0.88 to 0.91mm compared to Empirical Mode Decomposition (EMD), Ensemble Empirical Mode Decomposition (EEMD) and Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN). The signal-to- noise ratio (SNR) and correlation coefficient (CC) increased by 1.08 to 1.12 dB and 0.17 to 0.18, respectively. And the WVS method has the smallest difference from the true value. Finally, experimental analysis was conducted by using the vertical component of the GNSS time series from 100 GNSS sites located in the west coast of the USA. The real data results show that compared with EMD, EEMD and CEEMDAN methods, WVS can effectively reduce the uncertainty of station velocity and obtain more accurate velocity values, which is consistent with the conclusions of our simulations. Besides, the WVS algorithm can adaptively determine the optimal parameters for VMD decomposition, and it is also more efficient in time series noise removal.","PeriodicalId":50899,"journal":{"name":"Acta Geodynamica et Geomaterialia","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46939953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Terrestrial water storage changes over 25 global river basins extracted by local mean decomposition from GRACE Monthly Gravity Field solutions GRACE月度重力场解的局部平均分解提取的全球25个流域的地表水储量变化

IF 0.9 4区地球科学

Acta Geodynamica et Geomaterialia Pub Date : 2023-06-20 DOI: 10.13168/agg.2023.0006

Changming Huan

{"title":"Terrestrial water storage changes over 25 global river basins extracted by local mean decomposition from GRACE Monthly Gravity Field solutions","authors":"Changming Huan","doi":"10.13168/agg.2023.0006","DOIUrl":"https://doi.org/10.13168/agg.2023.0006","url":null,"abstract":"The strong striping and high-frequency noise existed in Gravity Recovery and Climate Experiment (GRACE) solutions drowned the real geophysical signals, which need other signal extraction methods. Considering the advantages of local mean decomposition (LMD) in extracting geophysical signals from noisy time series, we adopt it to filter the noise and estimate the terrestrial water storage (TWS) changes over 25 global main river basins from the time series of 14-year (2002.04~2016.08) Release 06 (RL06) monthly gravity field models provided by Center for Space Research (CSR), together with the empirical mode decomposition (EMD) as a comparison. To evaluate the efficiency of eliminating noise by LMD and EMD, the ratios of the latitude weighted RMS over the land and ocean signals are adopted. The results show that all RMS ratios of land relative to ocean signals derived by LMD are higher than EMD with the mean values 3.4458 and 3.3302, respectively. Moreover, relative to the Global Land Data Assimilation System (GLDAS) Noah model, the extracted TWS changes by LMD approach have smaller root mean squared errors than EMD over 25 global river basins. Therefore, it is reasonable to conclude that LMD approach outperforms EMD in extracting TWS changes and filtering out the strong noise existed in GRACE monthly gravity field solutions.","PeriodicalId":50899,"journal":{"name":"Acta Geodynamica et Geomaterialia","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43567923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0