Results 101 to 110 of about 4,727,875 (282)

Rapid development of coalmine bolting in China [PDF]

, 2009
Despite a slow beginning, coalmine bolting in China has got a rapid development in the past twenty years for pressing demand of deep mining, which has provided a sound technical support for safe and efficient coal production.
Cheng, Wang, Nong, Zhang, Yi-ming, Zhao
core   +1 more source

Using the Carrot as the Stick: U.S. Foreign Aid and the Effectiveness of Sanctions Threats

, 2023
These are the replication materials for "Using the Carrot as the Stick," including the STATA data sets, do file, and the Online Appendix. - "Using the Carrot as the Stick - Early and Jadoon.dta" is the main data set - "Threat Imposition Robustness ...
Early, Bryan
core   +1 more source

Shock wave propagation characteristics of aluminum‐containing explosive in corrugated steel‐lined tunnel

Deep Underground Science and Engineering, EarlyView.
Aluminum‐enhanced afterburning renders AE explosives more hazardous than conventional ones. Corrugated steel linings reduce far‐field AE blast overpressure by ~50% through wave reflection and dissipation. The developed model accurately predicts peak pressure (<10% error) and arrival time (<3% error), supporting protective design.
Zhen Wang, Jiayu Peng, Hujun Li, Yuguo Ji, Shuobiao Li, Guokai Zhang   +5 more
wiley   +1 more source

Prevention of Early Bolting in Elatum Hybrids of Delphinium by Raising Seeglings at Cool Temperature

Horticultural Research (Japan), 2002
エラータム系デルフィニウムの早期抽台を防止する冷房育苗法を開発するため，育苗時の冷房温度，冷房育苗終了時の苗の大きさおよび冷房育苗の方法が抽台と切り花品質に及ぼす影響について検討した． 1．‘ブルースプリングス’の早期抽台を防止するには，昼間（12時間）20℃-夜間（12時間）10℃の温度で，展開葉数が6~7枚に生長するまで冷房育苗すると有効であった． 2．冷房処理中の日長を短日にすると，‘ブルースプリングス’では小花数の増加はほとんど認められなかったが，‘M. F. ラベンダー’では顕著に認められた． 3．昼間は‘なりゆき’とし，夜間の16時間の温度を10℃に低下させる夜間冷房処理は，‘ブルースプリングス’では小花数の減少が終日冷房する区に比べてわずかであり，実用的に適用可能であった．
Katsutani, Noritoshi, Kajihara, Shinji, Hara, Hirokazu   +2 more
openaire   +2 more sources

Investigation on the failure evolution characteristics of surrounding rock in deep cross‐fault roadway: Based on physical model test and numerical simulation

Deep Underground Science and Engineering, EarlyView.
This study reveals the failure evolution characteristics of deep cross‐fault roadway surrounding rock under excavation support and periodic weighting. Periodic weighting readily induces fault activation, with the spatial distribution of failed rock masses being controlled by the fault strike and dip.
Tiezhu Li, Suping Peng, Jing Zheng, Zhanhua Yang, Qijun Tian   +4 more
wiley   +1 more source

Early learning hub community engagement highlights [PDF]

, 2023
prepared for the Early Learning Council."Summaries of Raise Up Oregon: Second Edition community input from four Early Learning Hubs: Eastern Oregon, Northwest, Southern Oregon, Washington County."This archived document is maintained by the State Library ...

core  

Investigation on the mechanical behavior of the multiple‐layered lining structure of a water conveyance tunnel with high internal water pressure

Deep Underground Science and Engineering, EarlyView.
This study presents large‐scale similarity model testing (geometric ratio 3.6) of an innovative multiple‐layered lining system—comprising exterior precast segments, middle self‐compacting concrete, and an interior steel pipe—for high‐pressure (0.75 MPa) water conveyance tunnels.
Ramin Asadi, Shimin Wang, Chang Liu, Zhiyu Lin, Chuan He   +4 more
wiley   +1 more source

Developing a universal tunnel span classification from global tunnel databases

Deep Underground Science and Engineering, EarlyView.
A universal tunnel span classification system is introduced that incorporates tunnel span, cross‐sectional area, typical tunnel types, and intended uses. Representative flatness ratio values are also provided for each span class. The classification is derived from a comprehensive database of 450 tunnel profiles from 47 countries.
Simon Heru Prassetyo, Inzagi Suhendar, Semmy Andrew Anugerah Djawa Tagi, Bonifacio Bondan Satryojati, Dzakwan Naufal Pratama, Yeremia Sintong Damero, Yudhidya Wicaksana, Erwin Lim, Ridho Kresna Wattimena   +8 more
wiley   +1 more source

Intelligent inversion analysis of dilatancy angle of surrounding rock based on the force of negative Poisson's ratio anchor cable

Deep Underground Science and Engineering, EarlyView.
An intelligent inversion framework estimates the dilatancy angle of the surrounding rock from negative Poisson's ratio (NPR) anchor cable force histories. Numerical tunnel‐excavation simulations generate force data across a controlled dilatancy‐angle range, which are mapped to the target parameter using a sequential convolutional neural network (CNN ...
Li Cui, Zhihao Sun, Lei Wang, Zhenmin Qi, Jianjun Ma, Xiaoming Sun   +5 more
wiley   +1 more source

Electrolytic (C2CNT) Carbon Nanotubes Made From CO2 as an Inexpensive Carbon Sink and High‐Capacity Li‐Ion Battery Graphite Replacement

EcoEnergy, EarlyView.
Carbon‐negative carbon nanotubes produced by molten CO2 electrolysis offer a low‐cost, high‐performance alternative to graphite in Li‐ion battery anodes. Replacing conventional carbon materials with electrolytic CNTs can improve battery capacity and charging performance while reducing costs and contributing to carbon mitigation.
Gad Licht, Stuart Licht
wiley   +1 more source