A5003130855- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Traffic and Road Safety
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Hydrocarbon exploration and reservoir analysis
- Traffic Prediction and Management Techniques
- Urban Transport and Accessibility
- Methane Hydrates and Related Phenomena
- Traffic control and management
- Radioactive element chemistry and processing
- Transportation Planning and Optimization
- Vehicle emissions and performance
- Geological and Geophysical Studies
- Isotope Analysis in Ecology
- Safety Warnings and Signage
- Injury Epidemiology and Prevention
- Sleep and Work-Related Fatigue
- Nuclear Physics and Applications
- Geochemistry and Geologic Mapping
- Heart Rate Variability and Autonomic Control
- Radioactive Decay and Measurement Techniques
- Automotive and Human Injury Biomechanics
- Transportation Safety and Impact Analysis
- Transportation Systems and Logistics
Research Institute of Petroleum Exploration and Development
2016-2025
China National Petroleum Corporation (China)
2016-2025
Southeast University
2022-2025
Southeast University
2025
South China University of Technology
2024
Peking University
2001-2024
University of Shanghai for Science and Technology
2022
Beijing University of Civil Engineering and Architecture
2021
Chang'an University
2019-2020
Wuhan University of Technology
2020
Abstract The history of atmospheric oxygen through the Mesoproterozoic Era is uncertain, but may have played a role in timing major evolutionary developments among eukaryotes. Previous work using chromium isotopes sedimentary rocks has suggested that levels were too low concentration (<0.1% present-day (PAL)) for expansion eukaryotic algae and evolution crown-group animals occurred later Neoproterozoic Era. In contrast, our new results on from Mesoproterozoic-aged Shennongjia Group South...
ABSTRACT Earth has a prolonged history characterized by substantial cycling of matter and energy between multiple spheres. The production organic carbon can be traced back to as early ∼4.0 Ga, but the frequency scale organic-rich shales have varied markedly over geological time. In this paper, we discuss cycle development black shale from perspective System Science. We propose that depositions are results interactions among lithospheric evolution, orbital forcing, weathering, photosynthesis...
Abstract The Mesoproterozoic Era (1,600–1,000 million years ago, Ma) geochemical record is sparse, but, nevertheless, critical in untangling relationships between the evolution of eukaryotic ecosystems and Earth‐surface chemistry. ca. 1,400 Ma Xiamaling Formation has experienced only very low‐grade thermal maturity emerged as a promising archive informing on interplay climate, ecosystem organization, chemistry atmosphere oceans. Indeed, portions been used to place minimum constraints...
Mo (‰) 0 0.5 1 1.5 2 2.5 Age (Ga) 3.5 3 Modern seawater Continental crustEukaryotes reached ecological importance in the late Neoproterozoic Era, some one billion years after their emergence.Their slow rise to prominence has been ascribed prolonged environmental stagnation, but testing this idea requires an appraisal of evolution atmospheric and ocean chemistry.Establishing a nuanced geochemical history is, however, challenging due paucity well preserved sedimentary rocks.Here, we present...
碳循环是生命改造地球的最主要途径. 海洋是地球上最大的活跃碳库, 其储碳‒释碳的异常波动对地球表层系统演化具有革命性影响. 然而, 中元古代无机碳同位素的相对稳定表明地球碳循环达到了一个相对平衡的状态. 因此, 研究中元古代海洋中由微生物主导的碳循环对于我们认识地球宜居演化具有重要意义. 本文从有机质来源、降解与富集等方面论证了中元古代海洋生物碳泵的主要地球化学过程, 提出初始有机质来自以蓝细菌为主的多源生物, 有机质降解有着反硝化细菌、铁还原菌、硫酸盐还原菌、产甲烷菌等多种微生物参与. 以中元古界下马岭组为例, 定量分析了受初级生产水平和水体氧化还原程度控制的微生物降解作用及降解程度, 估算14亿年前的海洋惰性可溶碳库增储可能达1000~2500×1012吨, 仅燕辽盆地的埋藏有机碳就达6000×108吨. 最后, 本文还讨论了磷、铁的供给对海洋碳循环的重要控制作用, 提出未来开展高精度沉积地球化学解析和多元素循环精细建模研究的必要性.
The mid-Proterozoic, spanning 1.8 to 0.8 billion years ago, is recognized as a phase of marine anoxia, low primary productivity (MPP), and constrained eukaryotic biodiversity. However, emerging evidence suggesting intermittent environmental disturbances concurrent evolution challenges the notion stagnant Earth during this era. We present study detailing volcanic activity its consequential impact on terrestrial weathering MPP, elucidated through examination 1.4-billion-year-old tropical...
Expressways in hilly areas feature complex alignment and environments constrained by terrain conditions, significantly threatening life property safety. This study aims to investigate crash risk prediction of expressways through environment features identify determinants the high for safety improvement. Based on 5 years data casualties damage an expressway southwestern China, order technique five clustering algorithms were employed determine classify levels. Environment extracted semantic...
This study analysed motorcyclist violation (MV) crashes on suburban roads of China to investigate how determinants affect MV crash injury severity and explore the temporal stability determinants. Crash data from Xi'an, (2015-2018) were utilized three categories: no injury, minor severe injury. Motorcyclist-related, crash-related, roadway-related, environment-related time-related characteristics utilizing a group random parameters multinomial logit models with heterogeneity in means...
Volcanic forcing of nutrient influxes into the ocean has been proposed as an important driver in punctuating pervasive depression oceanic productivity during mid-Proterozoic, yet direct evidence linking these events remains scarce. Here, we present high-resolution zinc isotopic systematics from well-studied Xiamaling Formation North China Craton (NCC), where mid-Proterozoic volcanism can be temporally correlated with deposition organic-rich sediments. Our results reveal coeval negative δ66Zn...