Results 91 to 100 of about 25,070 (217)

Main control factors of rock burst and its disaster evolution mechanism [PDF]

open access: yes
With the gradual transfer of shallow coal mining to deep coal mining in China, the rock burst disasters are becoming an increasingly serious problem. In the process of rock burst mechanism cognition to rock burst prevention engineering, the primary task ...
Deyuan FAN   +6 more
core   +1 more source

The coordination of dehydration tolerance and avoidance in oaks is mediated by leaf habit across a precipitation gradient

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests worldwide are increasingly impacted by drought due to climate change, prompting plants to adapt through dehydration tolerance (DT) and avoidance (DA), two distinct physiological strategies.
Xingyun Liang   +11 more
wiley   +1 more source

PBKy系列阀式避雷器

open access: yesDianci bileiqi, 1985
3.3和1.65kV РВКУ型阀式避雷器(统一设计的防护操作过电压用阀式避雷器)新系列是在全部零件统一的基础上研制的。组装避雷器的基本标准元件有火花间隙组和阀片组。间隙组由综合了转弧间隙和拉弧间隙的性能的复合式间隙组成。间隙(装置)的作用原理由全苏列宁电工研究院设计的 ...
В.П.ГИРЗЕ, 罗广能
doaj  

Study on the dynamic response characteristics of surrounding rock in high stress tunnel under blasting disturbance [PDF]

open access: yes
This research delves into the mechanical response of surrounding rock in deep coal mine roadways under high static and dynamic loads, utilizing similarity simulation experiments.
Bowen WU   +6 more
core   +1 more source

Lessons learned from screening potential other effective area‐based conservation measures

open access: yesConservation Biology, EarlyView.
Abstract Other effective area‐based conservation measures (OECMs) are sites that deliver effective biodiversity outcomes irrespective of their management objectives. These areas are widely expected to play an important role in efforts to protect 30% of Earth by 2030.
Carly N. Cook   +15 more
wiley   +1 more source

阿司匹林与氯吡格林联合干预糖尿病并急性脑梗死的效果评价

open access: yesZhongguo shiyan zhenduanxue, 2014
目的探讨阿司匹林联合氯吡格林治疗糖尿病并急性脑梗死的有效性和安全性。方法随机选取我院2010-2013年间收治的2型糖尿病并急性脑梗死的患者102例,随机分为联合用药组(阿司匹林+氯吡格林)和对照组(单纯阿司匹林),通过NINSS评分评价患者入组时的病情,观察治疗第7天和第30天后的临床效果以及副作用等情况,讨论治疗效果与安全性情况。结果治疗后第7天联合用药组的有效率是90.0%,对照组为73.1%,差异显著 ...
李金艳
doaj  

钢-压型钢板混凝土组合梁栓钉承载力研究综述

open access: yesJianzhu Gangjiegou Jinzhan, 2022
近年来,随着装配式施工的推广,钢-混凝土组合结构的应用越来越广泛。钢-压型钢板混凝土组合梁是组合结构中的常用构件。钢-压型钢板组合梁是通过抗剪连接件将钢梁与压型钢板混凝土组合楼板连接成一个共同工作的整体结构构件,组合梁中通常采用栓钉作为抗剪连接件。因此,对钢-压型钢板混凝土组合梁栓钉连接件的受剪承载力进行准确评估和计算具有重要的工程应用价值。为了获得较理想的栓钉连接件受剪承载力计算模型,对国内外压型钢板组合梁栓钉连接件承载力的研究进行了综述,并收集了相关推出试验的数据 ...
许兰兰, 胡夏闽
doaj  

Mechanical properties and deformation damage characteristics of deep rock under unloading and compensation paths [PDF]

open access: yes
To study the effect of stress compensation on the mechanical properties and deformation damage characteristics of unloading sandstone, a true triaxial perturbation unloading rock testing system was used to carry out unloading experiments on sandstone ...
Chongyan LIU   +4 more
core   +1 more source

Representativeness of the Natura 2000 network for preserving plant biodiversity in the European Union

open access: yesConservation Biology, EarlyView.
Abstract The Natura 2000 (N2K) network of protected areas is one of the main tools for area‐based conservation in the European Union (EU), yet its role in preserving plant biodiversity requires better understanding. We examined data kept in the European Vegetation Archive from over 1.2 million vegetation plots and obtained over 14.2 million plant ...
Michele Di Musciano   +41 more
wiley   +1 more source

Home - About - Disclaimer - Privacy