Results 41 to 50 of about 21,616 (149)
Jixie chuandong, 1997 计算带传动弹性滑动角的简易方法湖北汽车工业学院刘雍德引言摩擦型带传动工作时，带在带轮上有微量相对滑动——弹性滑动，这是带传动的固有特性。实验结果表明，当工作载荷低于额定载荷时，只在带离开带轮前的一部分接触弧上发生弹性滑动，这一部分弧被称为弹性滑动弧，...
刘雍德
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Conservation Biology, EarlyView.Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair +17 more
wiley +1 more source
Biodiversity‐driven spatial conservation planning to delineate temporally stable regions
Conservation Biology, EarlyView.Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella +5 more
wiley +1 more source
Scenarios and strategies for future‐proofing ecosystem management under climatic novelty
Conservation Biology, EarlyView.Abstract Climate change is driving unprecedented declines in dominant, habitat‐forming foundation species across marine and terrestrial ecosystems globally. As climatic novelty becomes the norm, ecosystem reassembly will become increasingly common. Predicting and understanding these transitions, and their implications for future ecosystem functioning ...
Lauren T. Toth +14 more
wiley +1 more source
Gaoya dianqi, 2015 针对电抗器容量及电压等级提高所带来的潜伏性故障发生趋势增加,笔者分析了绝缘水平、温升、振动特征参量的检测技术特点及其局限性,阐述了振动信号可作为电抗器各类故障的体现方式及其与电抗器的绝缘、温升之间的耦合关系,提出基于振动法的电抗器潜伏性故障检测应解决的关键技术问题,尤其是大型电抗器阵列式振动传感器的应用及其振动传播特性对故障诊断与定位的作用。以潜伏性故障特征及其耦合关系的角度诊断故障类型与故障定位,对电抗器状态检修具有实际的工程应用价值。
林瑞聪 +4 more
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Previous research has established the relationships between motivation, anxiety, teachers’ support, and self‐regulated learning (SRL) in English‐as‐a‐foreign‐language (EFL) learning. Most of the studies, however, have taken a variable‐centered approach in addressing the variable correlations, while learners’ characteristics and variable links ...
Yuhong Jiao, Barry Bai, Jing Li
wiley +1 more source
Dianci bileiqi, 1981 一、前言使用以氧化锌为主要成分的烧结体作为避雷器元件,发展没有串联间隙的配电用无间隙避雷器,并设置在6仟伏实际配电线路上。现把调查过的避雷器动作状况及其诸特性变化报告如下。二、配电用无间隙避雷器的特性及特点配电用无间隙避雷器（GL—6型、GL避雷器）的特性如下: 灭弧电压8.4仟伏;标称放电电流2500安;起始动作电压(直流V1mA ...
福田健, 郑娉婵
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How Do I Measure up? Social Influence and L2 Motivation in the Algorithmic Age
International Journal of Applied Linguistics, EarlyView.ABSTRACT Comparative thinking is a fundamental human drive and a hallmark of contemporary life. For social action, such as the learning and use of additional languages, a target for appraisal (an L2 attribute) is evaluated in relation to a comparison standard (an appraiser's standpoint).
Alastair Henry, Meng Liu
wiley +1 more source
Gaoya dianqi, 1980 对CTA型与CTB型两种新型手动弹簧机构的研制工作作了介绍。给出了该机构的参数,详细介绍了动作原理、结构特点、输出力矩特性与断路器负载特性的配合计算以及有关试验结果。
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Gaoya dianqi, 2012 笔者分析了宝安换流站差动保护误动作的情况。根据现场实际录波,考虑直流滤波器TA特性,讨论直流滤波器差动保护的特点、直流输电的特殊运行工况对直流滤波器差动保护的影响,并结合其特点提出相应3种反措,以提高差动保护的可靠性。这可以完善直流滤波器差动保护,从而增强高压直流安全稳定运行性能。
田庆
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