Results 71 to 80 of about 69,697 (199)
He jishu六方氮化硼具有与石墨烯类似的六元环组成的片层结构，因而呈现出优异的机械性能和导热性能，在诸多应用领域受到广泛关注。基于六方氮化硼制备工艺的高能耗问题，本文旨在提出一种更加绿色、低能耗的制备工艺。本工作使用熔盐介质法作为制备工艺方法：以氯化钾-氯化钠（KCl-NaCl）为熔盐体系，三聚氰胺（C3N6H6）和硼酸（H3BO3）为反应物，通入氮气（N2）作为反应气体。该研究通过改变熔盐与反应物质量比、反应物中氮-硼摩尔比、保温温度、保温时间等条件，系统研究了不同条件对制备六方氮化硼产物的影响 ...
黄 宇灿 +5 more
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Conservation Biology, EarlyView.Abstract Modeling species distributions in dynamic pelagic environments remains challenging, particularly for wide‐ranging and highly mobile species when there is limited guidance on model performance. This limitation constrains the effective use of species distribution models (SDMs) in marine conservation, where robust and transferable predictions are
E. Pasanisi +32 more
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He jishu小型模块化熔盐堆具有广泛的发展前景，但由于受到空间尺寸、传热效率和高温工作环境的限制，对熔盐换热器的性能提出了较高的要求。因此对不同微通道换热结构在高温环境下的流动换热特性的研究具有重要意义。本研究采用数值模拟方法，以熔盐（FNaBe）-超临界二氧化碳（SCO2）换热器为研究对象，在FNaBe熔盐侧分别采用Z型和波浪型等两种板翅式通道结构，在SCO2侧分别采用椭圆翅片和翼型翅片两种通道结构，对4种通道结构的整体和局部流动传热特性进行了研究分析。研究结果表明：熔盐侧Z型流道具有更强的传热性能 ...
李 哲, 陈 玉爽, 杨 晓虹
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Conservation Biology, EarlyView.Abstract Adaptive management of threatened species relies on having ex ante estimates of species’ responses to different interventions. Structured expert elicitation is often used to generate these estimates, but comparisons of these expert‐predicted outcomes with observed results are rare.
Helen J. Mayfield +18 more
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Conservation Biology, EarlyView.Abstract The International Union for Conservation of Nature (IUCN) Red List of Threatened Species is a critical measure of global aquatic and terrestrial biodiversity status. It is also the basis for the Red List Index, which tracks extinction risk over time.
Brittany Finucci +10 more
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Comprehensive and representative conservation planning for biodiversity of ice‐free Antarctica
Conservation Biology, EarlyView.Abstract Antarctica is designated as a natural reserve devoted to peace and science, with Antarctic Specially Protected Areas (ASPAs) serving as the primary instrument for area‐based biodiversity protection. However, the existing ASPA network lacks the comprehensiveness and representativeness required under Annex V, Article 3(2), of the Madrid Protocol.
Wen Wen +3 more
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Palette-based image recoloring based on moving least squares(基于移动最小二乘的图像重着色)
Zhejiang Daxue xuebao. Lixue banIn recent years, palette-based image recoloring techniques have garnered widespread attention and application across various domains such as graphic design, photo editing, and advertising production.
周家伟(ZHOU Jiawei) +5 more
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Fushe yanjiu yu fushe gongyi xuebao本研究全面评估2023年东海浙南段水流域的放射性水平，为即将运行的三澳核电站的环境监测和评估提供可靠的本底数据。对目标海域的海水、海洋生物及海底泥样品进行季度采集与分析，评估这些放射性核素在时间和空间上的变化。结果发现，浙南段水流域海水的氚活度在4个季度中表现出显著的季节性变化，分别为0.33 Bq/L、0.38 Bq/L、0.39 Bq/L和0.26 Bq/L，α核素活度也呈现季节性波动，全年平均活度为0.03 Bq/L；生物样的氚活度较低；海底泥中γ核素活度范围为：238U（1.61~9.32 Bq/
王 天姿 +4 more
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Conservation Biology, EarlyView.Abstract Qualitative approaches are increasingly applied in conservation social science, yet methodological reflection remains limited. Member checking, a process of returning findings to participants for feedback, is widely recognized outside conservation as a means to enhance rigor and reciprocity, but it is rarely reported in conservation research ...
Judith J. Rakowski +6 more
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Intact coastal nursery rearing amid climate‐driven phenological shifts in threatened salmon
Conservation Biology, EarlyView.Abstract Literature linking phenology to climate has proliferated in recent decades and shows that climate change has reorganized seasonal opportunities worldwide. However, this literature often quantifies changes in point measures of timing (e.g., beginnings and peaks) without context about duration (e.g., rearing season length) or performance (e.g ...
Stuart H. Munsch +8 more
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