Results 61 to 70 of about 5,933,277 (298)

Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratum

open access: yesDeep Underground Science and Engineering, 2022
Tool wear is a noteworthy problem in the process of shield tunneling, and the degree of wear varies with stratum. The sand‐pebble strata in Beijing are typically mechanically unstable.
Hua Jiang   +5 more
doaj   +1 more source

Low Latency Global Carbon Budget Reveals Late 2024 Carbon Losses and Contrasting Early 2025 Land Sink Recovery Signals

open access: yesAdvanced Science, EarlyView.
Low latency carbon budget estimates for July 2024–June 2025 combine atmospheric CO2 growth rates, fossil emissions, ocean uptake, DGVM land fluxes, and OCO‐2 inversions. The budget shows that late‐2024 land carbon losses dominate the annual anomaly, while early‐2025 recovery differs between bottom‐up models and top‐down inversions, especially in ...
Piyu Ke   +32 more
wiley   +1 more source

Three-dimensional omnidirectional characterization methods of rock anisotropic wave velocity and acoustic emission location optimization

open access: yes工程科学学报
Rock failure and instability have been key research topics in rock mechanics domestically and internationally. Numerous geotechnical disasters, such as rock bursts and slope instability, are associated with these phenomena. Acoustic emission detection is
Shengjun MIAO   +5 more
doaj   +1 more source

Decoding Viral Transmission Dynamics in Structured Populations Using a Microfluidic Herd‐Immunity‐on‐a‐Chip Platform

open access: yesAdvanced Science, EarlyView.
A microfluidic Herd‐Immunity‐on‐a‐Chip experimentally recreates structured contact networks to quantify viral transmission dynamics. By controlling susceptible, infected, and non‐susceptible populations, the platform reveals how contact topology governs the reproduction number, outbreak propagation, herd‐immunity–like behavior, and intervention ...
Jiande Zhang   +6 more
wiley   +1 more source

Intelligent carbon emission assessment method for metal mine shaft construction projects

open access: yes工程科学学报
The metal mining industry is the second-largest carbon emitter in China, followed by the power industry. The metal mining industry is closely intertwined with six major industries that prioritize emission reduction, including steel, nonferrous metals ...
Lan QIAO   +5 more
doaj   +1 more source

Study on the Law of Rock Anelastic Recovery and the Characteristics of In Situ Stress Field of 2000 m Deep Stratum in Metal Mines of Coastal Area

open access: yesAdvances in Materials Science and Engineering, 2022
In situ stress field in deep strata is dominated by self-weight stress and tectonic stress, which is the dynamic source of a series of mining dynamic disasters such as rock burst, mine earthquake, and collapse.
Yuezheng Zhang, Hongguang Ji, Hanhua Xu
doaj   +1 more source

Barrio morphology and private space: the social drivers of informal urban settlements in Caracas [PDF]

open access: yes, 2021
Urban morphology has historically been studied through the physical characteristics of a particular space. However, the urban form of a place is also influenced by relationships and social contexts.
Quintana Vigiola, G
core  

Bridging Horizontal to Vertical Radiative Cooling

open access: yesAdvanced Science, EarlyView.
Radiative cooling materials are mature but only work facing the sky, confining them to rooftops. Instead of developing new ones, this system bridges existing horizontal coolers to vertical windows using blades outside the glass. On an occupied urban building, windows stay up to 1.4°C below air temperature while preserving daylight, outward views, and ...
Xiangyu Meng, Gan Huang
wiley   +1 more source

Network Design Mode of In-Seam Gas Extraction Parameters Using Mathematical Modelling—Take Tangan Colliery as an Example

open access: yesGeofluids, 2020
Gas extraction is a practical and effective way to guarantee mining-process safety and deliver greater environmental benefits through reducing greenhouse gas emissions and increase the supply of a valuable clean gas resource.
Tong-qiang Xia   +4 more
doaj   +1 more source

The Generation of value in Urban Spaces

open access: yesEquilibri, 2020
The transformation of capitalism over the centuries has assigned a variety of roles to the city as a place to attract economic activity and produce wealth. The third wave of globalization is driven by the knowledge economy, where creativity and talent are generators of innovation and urban competitiveness.
openaire   +2 more sources

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