Results 11 to 20 of about 9,691 (168)

Mechanical behaviors of soft rocks based on the fractional thermal elastic-plastic theory [PDF]

open access: yes, 2021
Soft rocks have complex thermodynamic behaviors and their strength maybe increase or decrease with temperature. In this paper, the soft rocks were considered as heavily over-consolidated clays and their preconsolidation pressure was assumed to be the ...
Li, H, Ma, B, Sheng, D, Zhang, S
core   +1 more source

Experimental study on desorption characteristics of gas-containing coal under the action of overburden pressure and water injection [PDF]

open access: yes, 2023
It is easy to form a coupling effect between ground stress and gas, and cause the accident of coal and gas outburst dominated by ground stress during deep mining.
Mei HAO   +3 more
core   +1 more source

Study on mechanical properties and damage characteristics of granite under thermal shock based on CT scanning [PDF]

open access: yes, 2023
During the exploitation of deep geothermal resources, the thermal fractures of high-temperature rocks are usually induced by the impact of low-temperature fluids to improve the permeability of reservoir rocks.
Jiamin WANG   +5 more
core   +1 more source

Pore structure characteristics of middle and low rank coals and their influence on gas desorption characteristics [PDF]

open access: yes, 2022
The pore structure of coal is an important factor affecting gas storage and migration. In order to further study the gas desorption characteristics of low and medium metamorphic coals, 6 sets of coal samples from the Fukang mining area were selected for ...
Bang REN, Cuixia WANG, Jikun LIU
core   +1 more source

Browning mechanism of indigo juice during processing prevention and control technology [PDF]

open access: yes, 2023
Objective: Indigo fruit juice is prone to browning during processing. Methods: A kinetic model was fitted by determining the changes in browning degree, vitamin C (VC) content, and 5-hydroxymethylfurfural (5-HMF) content of indigo fruit juice during the ...
HAN Chunran   +4 more
core   +1 more source

匝道弯桥在运营状态下的力学性能分析 [PDF]

open access: yes, 2018
匝道弯桥线型优美、适应性强,广泛应用于城市道路交通建设中。然而,较小的曲率半径也容易引发一些病害事故,例如支座脱空、梁体侧移、预应力筋崩出、甚至梁体倾覆等。为分析匝道弯桥的受力性能,同时找出这些问题产生的主要原因以及作用规律,本文以某实际匝道弯桥作为工程背景,通过建立有限元建模,并施加多种荷载工况进行计算分析,探讨了不同曲率半径和跨径对匝道弯桥基本力学性能的影响。福建省交通运输科技项目 ...
曾勇文, 梅子飞, 裘是
core   +1 more source

Are Galliformes of the High Himalayas Well Protected? Identifying Conservation Priority Areas Using an Assemblage‐Level Approach 高喜马拉雅地区的鸡形目鸟类是否得到了有效保护?利用群落水平方法确定优先保护区域

open access: yesIntegrative Conservation, EarlyView.
This study investigates distribution patterns of Galliforms in the Indian Himalayas, focusing on factors influencing their occurrence, regions of high diversity and endemism, and their overlap with protected areas. Our study highlights the need for assemblage‐level conservation strategies in high Himalaya which primarily relies on snow leopard‐focused ...
Manvi Sharma   +5 more
wiley   +1 more source

Synthesis, Structure Modulation and Photoluminescence Properties of Silver Coordination Compounds [PDF]

open access: yes, 2015
由于具有丰富的结构和多样的性能,近二三十年来配合物是科研的热点领域。实现对配合物结构和性质的控制是晶体工程的重要目标。然而,配合物自组装反应受金属离子、配体、阴离子、溶剂等很多因素的影响。一价银离子具有d10的电子构型,配位几何多变,且可能形成亲银作用,银配合物还可能具有荧光性质。本文研究的是阴离子、羧酸、溶剂调控的银与几种含N配体的配合物。 第二章论述的是阴离子调控的1:1的银-2,4-二氨基-6-[2-(2-甲基-1-咪唑基)乙基]-1,3,5-三嗪(L1)配合物。1,5 ...
梅洪鑫
core  

Experimental study on unloading creep of sandstone under temperature-seepage coupling conditions [PDF]

open access: yes
Environmental factors (such as temperature and water) and their coupling effects will change the unloading creep properties of surrounding rock after tunnel excavation, threatening the stability of surrounding rock and the safety maintenance of ...
Gongyu HOU   +7 more
core   +1 more source

Scaling from microsite to landscape to resolve litter decomposition dynamics in globally extensive drylands

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop   +8 more
wiley   +1 more source

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