Results 81 to 90 of about 469 (202)

Threshold Asymmetric Conditional Autoregressive Range (TACARR) Model

Journal of Forecasting, EarlyView.
ABSTRACT This paper introduces a Threshold Asymmetric Conditional Autoregressive Range (TACARR) model for analyzing the daily price ranges of financial assets. The proposed formulation assumes that the conditional expected range switches between two regimes, representing upward and downward market states, with the disturbance distribution also allowed ...
Isuru Ratnayake, V. A. Samaranayake
wiley   +1 more source

Study on comprehensive evaluation of surrounding rock stability grade and repair control technology of gob-side entry retaining

矿业科学学报, 2017
In order to solve the multiplexing problem of gob-side entry retaining, the analytic hierarchy process(AHP) and the matter-element evaluation were applied to establish a multi-hierarchy and multi-index comprehensive evaluation model of surrounding rock ...
Zhao Yongqiang, He Fulian, Xie Fuxing, Wu Jingke, Liu Bingquan   +4 more
doaj   +1 more source

Large Section of Soft Rock Gob‐Side Entry Retaining Surrounding Rock Control

Advances in Civil Engineering
When cutting roof and pressure relief, the impact of blasting is especially obvious on the integrity of the roof of a large‐section soft‐rock roadway. The reasonable parameters of blasting roof cutting were studied through using Xiaohezui coal mine ‐12110 roadway as the engineering background. The LS‐Dyna simulation results show that: Interval blasting
Xizhi Wang, Yongjian Zhu, Ping Wang, Heng Ren, Peng Li, Xianwen He, Jianhua Lv   +6 more
openaire   +2 more sources

Significant Imbalance Between Human Activities and Ecosystem Services in the Tibet Autonomous Region of China: Evidence From an Improved Coupling Coordination Degree Model

Land Degradation &Development, EarlyView.
ABSTRACT Maintaining balanced interactions between humans and ecosystems in plateau regions is critical to achieving global sustainable development. However, existing methodologies are insufficient to fully elucidate the complex coupling and coordination relationships between human activities and ecosystems, as well as the sustainable development ...
Yaohang Sun, Dongxia Yue, Jianjun Guo, Hanhua Deng, Jiaoyu Zheng, Gang Jin   +5 more
wiley   +1 more source

Mitigating Coal Spontaneous Combustion Risk within Goaf of Gob-Side Entry Retaining by Roof Cutting: Investigation of Air Leakage Characteristics and Effective Plugging Techniques

Fire
Relative to conventional coal pillar retention mining technology (the 121 mining method), gob-side entry retaining by cutting roof (the 110 mining method), a non-pillar mining technique, efficiently addresses issues like poor coal resource recovery and ...
Zhipeng Zhang, Xiaokun Chen, Zhijin Yu, Hao Sun, Dewei Huang, Jiangle Wu, Hao Zhang   +6 more
doaj   +1 more source

Study on Gob-Side Entry Retaining of Field Application [PDF]

Proceedings of the 2016 5th International Conference on Sustainable Energy and Environment Engineering (ICSEEE 2016), 2016
Yue Wang, Weidong Lu, Bin Yin
openaire   +1 more source

Soft Roof Failure Mechanism and Supporting Method for Gob-Side Entry Retaining

Minerals, 2015
To study the soft roof failure mechanism and the supporting method for a gateway in a gently inclined coal seam with a dip angle of 16° kept for gob-side entry retaining, and through the methodology of field investigation and numerical and analytical modeling, this paper analyzed the stress evolution law of roof strata at the working face end and ...
Hongyun Yang, Shugang Cao, Yong Li, Chuanmeng Sun, Ping Guo   +4 more
openaire   +2 more sources

‘More Beastliness Than Beauty’: Gendering Pica in Seventeenth‐Century English Medicine and Culture

Gender &History, EarlyView.
ABSTRACT Today, defined as the ‘persistent eating of non‐nutritive substances’, pica is a lesser‐known eating disorder with a long history. Defined in early modern England as the ‘desire to eat absurd things’, pica was explicitly gendered, associated with pregnant women and pubescent girls.
Helena C. Aeberli
wiley   +1 more source

Research on gob-side entry retaining using high-strength lightweight block

IOP Conference Series: Earth and Environmental Science, 2019
In order to effectively reduce the tension between the mining face and the tunnelling connection and increase the underground work efficiency. The engineering background of this paper is - 4111 face of Jingang Coal Mine, located in Dazhou, West China's Sichuan Province.
Changlong Zhou, Hong Li
openaire   +1 more source

GROWING GREEN IN US SUBURBIA: Property Value, Race and Domestic Landscaping Aesthetics in Mid‐Century America

International Journal of Urban and Regional Research, EarlyView.
Abstract Much of the current popular and academic literature on the provision of green spaces is dominated by the assumption that ‘nature’ is an unalloyed positive, and that socioeconomic and racial exclusion from access to green spaces is a problem of unequal spatial distribution rather than of the form and content of particular urban designs.
Kiera Chapman
wiley   +1 more source