Results 41 to 50 of about 43,964 (306)

Investigation of the failure characteristics of fissure tunnels under dynamic and static combinations

Deep Underground Science and Engineering, EarlyView.
This article aims to investigate the dynamic fracture response of fractured tunnel models under zero geological stress through physical experiments and numerical simulations. It further simulates the dynamic fracture characteristics of fractured tunnel models under geological stress ranging from 0 to 2.5 MPa using the numerical software AUTODYN ...
Peng Ying, Yu Ying, Xiaohan Li, Han Zhao, Kewei Yu, Zheming Zhu, Lei Zhou, Xibin Li   +7 more
wiley   +1 more source

Comparison of Machine Learning Models in Simulating Glacier Mass Balance: Insights from Maritime and Continental Glaciers in High Mountain Asia

Remote Sensing
Accurately simulating glacier mass balance (GMB) data is crucial for assessing the impacts of climate change on glacier dynamics. Since physical models often face challenges in comprehensively accounting for factors influencing glacial melt and ...
Weiwei Ren, Zhongzheng Zhu, Yingzheng Wang, Jianbin Su, Ruijie Zeng, Donghai Zheng, Xin Li   +6 more
doaj   +1 more source

Paleomagnetism From Central Iran Reveals Arabia‐Eurasia Collision Onset at the Eocene/Oligocene Boundary

Geophysical Research Letters, 2023
We present two robust and well‐dated paleomagnetic poles from upper Eocene and Oligocene volcanics in the Urumieh‐Dokhtar magmatic arc, Central Iran. These two poles place Iran ∼3.7°–3° of latitude south of its present position between ca.
Peiping Song, Lin Ding, Liyun Zhang, Fulong Cai, Qinghai Zhang, Zhenyu Li, Houqi Wang, Morteza Khalatbari Jafari, Morteza Talebian   +8 more
doaj   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Ultrasound and infections on the Tibetan Plateau [PDF]

Journal of Ultrasound, 2012
The authors report on an ultrasound (US) outreach program for the nomadic people living in Yushu, a remote area of Qinghai, Tibet, People's Republic of China (PRC) about 4800 m above sea level. The program was carried out in cooperation with ROKPA INTERNATIONAL, a non-profit organization (NGO) that aims at helping the poorest peoples living in remote ...
Giordani Maria Teresa, Giaretta Renato, Scolarin Carlo, Stefani Maria Pia, Pellizzari Cristina, Tamarozzi Francesca, BRUNETTI, ENRICO   +6 more
openaire   +3 more sources

Organic Geochemical Characterization and Exploration Prospects of Hydrocarbon Source Rocks in Nepal

Energy Science &Engineering, EarlyView.
It provides a more detailed introduction to the current situation of oil and gas exploration in Nepal, as well as the properties and distribution characteristics of source rocks. ABSTRACT This study aims to evaluate the hydrocarbon generation potential and exploration prospects of hydrocarbon source rocks in the Dailekh to Dang–Tansen area of Nepal ...
Guoqiang Zhang, Rui Wang, Yinglie Li, Xinhe Wu, Yanming Qu   +4 more
wiley   +1 more source

Seasonal drivers of plant–soil–microbial community structure and functions in Western Himalayan grasslands, Pakistan

Grassland Research, EarlyView.
Plant species richness was greater in summer in both alpine and subalpine grassland ecosystems. Soil moisture demonstrates significant positive correlations with soil organic carbon and total nitrogen across seasonal periods. Microbial α‐diversity peaks during summer but maintains functional stability across seasons.
Huma Ali, Muhammad Rafiq, Allan Degen, Ben Sparrow, Zhanhuan Shang   +4 more
wiley   +1 more source

The Significant Impact of Lost Species' Identity, Number and Abundance on Functional Structure of Alpine Meadow

Ecology and Evolution
Biodiversity, the cornerstone of ecosystem functions and services, faces threats from anthropogenic climate change. However, it remains unclear how species loss, including abundance, number, and identity of lost species, would alter the functional ...
Zhiyong Yang, Ci‐ren Qu‐zong, Yuan Zhang, Xine Li, Skalsang Gyal, Wei Mazhang, Ying Yang, Guotai Zhang, Cuo Se, Danzeng Quzhen, Jingting Mao, Chengwei Mu, Lan Wang, Shiping Wang, Tsechoe Dorji   +14 more
doaj   +1 more source

A 16-year dataset (2000–2015) of high-resolution (3 h, 10 km) global surface solar radiation [PDF]

Earth System Science Data, 2019
The recent release of the International Satellite Cloud Climatology Project (ISCCP) HXG cloud products and new ERA5 reanalysis data enabled us to produce a global surface solar radiation (SSR) dataset: a 16-year (2000–2015) high-resolution (3 h ...
W. Tang, W. Tang, K. Yang, K. Yang, J. Qin, X. Li, X. Li, X. Niu   +7 more
doaj   +1 more source

Late summer plateau pika spatial habitat use revealed by high‐resolution wildlife tracking and unmanned aerial vehicle data on the Qinghai‐Tibet Plateau

Grassland Research, EarlyView.
Tiny “ecosystem engineers,” plateau pikas range across 1600 m², about two basketball courts, mixing soil and nutrients that sustain Tibet's fragile grasslands. Custom‐made trackers and drone imagery show dawn‐to‐dusk surface foraging and nested‐scale patch choices, offering fresh guidance for wildlife‐friendly grazing management.
Dan Li, Johannes M. H. Knops, Li Li
wiley   +1 more source