Results 51 to 60 of about 762,283 (161)
Subspecies taxonomy reflects social and geographic patterns of taxonomic effort in tetrapods
Abstract Subspecies have been used in conservation biology to account for intraspecific patterns in genetic diversity, which is crucial to long‐term population viability. Although over 3200 subspecies are currently assessed by the International Union for Conservation of Nature Red List, their biological relevance remains controversial.
Jhonny J. M. Guedes +3 more
wiley +1 more source
目前对电网主设备风险评估方法的研究处在发展阶段,且存在不同类型评估对象的评估特征没有通用性、传统评估方法存在人为因素影响和不区分各指标重要程度等问题,笔者在南方电网公司变压器、断路器等电网主设备状态评估导则建立的故障树的基础上,结合设备现场运行数据和故障分布,提出基于隶属函数、相对劣化度、加权平均的故障概率评定方法并引入模糊层次分析法确定各底事件、中间事件的相对权重,实现对设备各部件的风险评估。最后通过某500 kV变电站3号主变的风险评估指标进行评判分析,对文中所建立的评估模型进行验证,并根据实际运行、
田雨, 张晗
doaj
[Pay attention to burn rehabilitation assessment]. [PDF]
Tan JL, Luo GX.
europepmc +1 more source
Using the capabilities approach to achieve people‐centered conservation
Abstract Top‐down interventions carried out by state and nonstate institutions to conserve biodiversity and improve the lives of forest‐proximate people (FPP) in the Global South tend to reflect economistic understandings of human well‐being. More progressive and people‐centered conservation projects are guided by normative visions of how the world ...
Arthur Rodrigues +4 more
wiley +1 more source
动物福利科学一直强调关注个体动物的主观感受,科学评估动物的主观感受在有效提升动物福利状态、改进动物管理方面均具有重要意义。与通过行为数据及生理数据评估动物感受的定量方法相比,定性评估法具有耗时短、实时评估、便于多机构同步收集数据等多项优势,在动物园等圈养野生动物机构中具有重要的应用价值。用于定性评估圈养野生动物主观感受的现有方法包括:1)以动物的情绪状态特征和(或)行为特征为评估项的定性评估法; 2)基于动物自身的行为选择评估其主观感受的新方法——认知偏差法。本文也讨论了农场动物 ...
崔媛媛 卫泽珍 刘 珑
doaj
Optimizing biodiversity offsetting for habitat succession and colonization dynamics
Abstract Biodiversity offsetting aims to compensate for ecological losses from development through conservation and restoration. However, its long‐term outcomes under repeated impact–offset cycles remain uncertain. Using a conceptual forest succession model, we evaluated how offset outcomes are affected by interactions among compensation scale ...
Konstans Wells +4 more
wiley +1 more source
从耕地质量的内涵出发,构建耕地质量多功能评价的技术平台。在明确评价内容的基础上。建立耕地质量评价的技术指标,定义各指标权重,同时以平湖市为研究区。对评价因子阈值的确定进行了详细阐述,形成具有可操作性的耕地质量评价技术指标。
方斌 +5 more
doaj
测量不确定度是评定测量结果的重要参数.超声波检测是最常用的无损检测方法之一,探头是超声波探伤仪的重要组成部分,它的性能是检测工作得以顺利进行的关键.在检测工作进行之前,对其各性能参数进行准确测试,是提高缺陷定位准确性的重要手段.以超声波检测用斜探头性能参数测试实验为例,说明不确定度评定在无损检测定量分析中的作用.实验依据专业标准JB/T10062-1999的规定,对探头的前沿长度、K值、偏离角度进行了测试,从仪器、方法等方面,对测试结果进行了不确定度评定,试图提出一些建设性改进方案 ...
中国科学院新疆生态与地理研究所,新疆乌鲁木齐,830011 +1 more
core
ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao +2 more
wiley +1 more source
本发明属于石油地质勘探录井中使用的一种岩屑定量评价仪,由微型计算机1、样品箱2、光电扫描器3、白光灯4等组成,光电扫描器3与微型计算机1用电缆9相连,样品箱2的上方安装有光电扫描器3和白光灯4,在白光灯4的下方安装有散光板5,在样品箱2的内侧安装有紫外光源6,下方放有样品盘7和标样台8,可提高岩屑录进分析的技术水平,实现岩屑样品中砂岩、泥岩、含油砂岩百分含量及含油丰度的定量自动检测评价,提供客观、精确的评价数据,提高岩屑录井资料的可靠性、实用性和可比性 ...
黄威东 +9 more
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