Results 21 to 30 of about 1,185,967 (144)
, 1997 提出一种仅需一台染料激光器即可同时测量火焰中氢和氧的CARS谱的新方法。取带宽为120cm~(-1)，中心波长位于580.4nm的Stokes光束与532nm的泵浦光束相配合，同时测量氢扩散火焰中的氢和氧的CARS谱，用氢的S(6)和S(5)的积分强度比确定火焰中的温度并与氮的Q支CARS谱测量的温度和经过热损耗修正的热电偶测得的温度取得了相当好的一致结果。一次测出氢和氧的CARS谱，避免多次测量中参数的难以重复性 ...
赵建荣, 俞刚, 杨仕润
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A systematic review of avian influenza virus transmission models: Gaps and opportunities
Methods in Ecology and Evolution, EarlyView.Abstract Highly pathogenic avian influenza virus (HPAIV) increasingly threatens wild birds, poultry, non‐human mammals and humans, yet gaps and opportunities in avian influenza virus (AIV) transmission modelling have not been comprehensively synthesized.
Shenglai Yin +7 more
wiley +1 more source
, 1986 多台脉冲X光同步照相技术在爆炸力学等各个领域中得到了广泛的应用。数控脉冲X光同步机解决了多台同步运行时的同步精度,为精确地确定动态现象的照相时间,还必须测定每台脉冲X光机准确的出光时间。过去通常以脉冲X光机的放电电流或电压讯号代表出光时间讯号进行测量。由于脉冲X光的测试是在高压大电流脉冲放电的环境中进行,
金辉, 陈善良
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Guangtongxin yanjiu, 2013 符号同步偏差严重影响了OFDM（正交频分复用）系统的性能。针对S&C方法存在的测度平顶和Minn方法出现的副峰,提出了一种新的符号同步方法。该方法在Minn方法的基础上,通过设计新的定时测度计算方法,在消除定时测度平顶的同时,还避免了定时测度曲线副峰的出现。仿真结果表明,该方法的定时测度曲线为单一峰值,在低信噪比及多径衰落环境下具有更低的均方误差。
郑小真, 孟艳花
doaj
Methodology to identify ecologically matching areas and its applications in conservation planning
Conservation Biology, EarlyView.Abstract Identifying ecologically matching areas is both challenging and critical for understanding spatial patterns of biodiversity and advancing conservation planning. However, existing approaches often lack spatial flexibility, overlook shape and size constraints, or rely on limited environmental parameters, reducing their effectiveness in real ...
Pietro Milanesi +7 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract In multiuse areas outside formal protection, sustaining both wildlife and people is critical to wildlife conservation and coexistence efforts. Botswana's Kalahari hosts one of sub‐Saharan Africa’s largest unprotected areas supporting free‐ranging wildlife.
Marie‐Charlotte Gielen +7 more
wiley +1 more source
Effects of climate change on marine biodiversity on the western Atlantic coast
Conservation Biology, EarlyView.Abstract The current climate crisis, driven by greenhouse gas emissions, threatens global biodiversity, including that in marine ecosystems. However, projections for the western Atlantic Ocean that jointly quantify species richness and endemism while accounting for spatially biased and incomplete occurrence data remain limited.
Ubirajara Oliveira +33 more
wiley +1 more source
World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT Biochemical oxygen demand (BOD) remains a core indicator of organic pollution in freshwater monitoring, but its role in water policy and practice is changing as water‐quality assessment moves toward predictive, integrative, and decision‐support approaches.
Isadora Favero Roque Cenci +5 more
wiley +1 more source
Learning Styles, Engagement and Anxiety in AI‐Mediated Writing: A Multimodal Feedback Study
International Journal of Applied Linguistics, Volume 36, Issue 4, Page 3269-3281, November 2026.ABSTRACT Artificial intelligence (AI) tools now permeate English academic writing. However, evidence on how feedback modalities align with student differences and with psychological mechanisms remains limited. Prior work often reduced learning styles to simple matches with delivery modes and treated learning engagement and writing anxiety as peripheral.
Yi Ren +3 more
wiley +1 more source
ICP—MS同时测定聚合氯化铝中的Al2O3及5种元素含量的研究
Gongye shui chuli, 2000 研究结果表明:用ICP—MS可以同时测定聚合氯化铝中的Al2O3及As、Mn、Hg、Pb、Cd5种元素的含量。测试样品(100倍稀释固体聚合氯化铝)中Al2O3、As、Mn、Hg、Pb、Cd的测定结果分别为:0.30%、1.87μg/L、95.4μg/L、46.0ng/L、23.3μg/L、574ng/L;测定的准确度分别为930%、109%、944%、883%、980%、886%。ICP—MS法具有10-12～10-6级多元素同时分析、测定快速、样品前处理简单、干扰少、省事、省力等无可比拟的优点。
农晋琦, 卢益新, 朱蓉
doaj +2 more sources