Results 31 to 40 of about 11,289 (219)
Zhejiang Daxue xuebao. Lixue ban, 2010 运用WRF模式对2006年6月10日发生在浙江地区的一次飑线过程进行了数值模拟及云迹风资料同化实验研究.将常规测站、自动站资料同化试验和加入了云迹风资料的试验进行比较,结果表明,用WRF模式进行同化模拟,较好地再现了此次江南地区飑线的发生、发展、维持和消亡过程.主要分布在对流层高层的云迹风资料能有效地改善高空风场质量,在模式中增加了云迹风资料之后,使模拟的雷达反射率图像增加了清晰度,原来有些地段较为零星逗点状的反射率图像可被连成带状,尤其明显的是模拟的主降水强度和落区与实际降水分布更加接近 ...
SHENHang-feng(沈杭锋) +3 more
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太阳活动下降年昆明地区TEC变化特征与IRI-2020模拟比较分析
Kongjian kexue xuebao, 2023 利用昆明低纬度测站（24.7°N，102.9°E，磁纬15.1°N）2016－2019年的观测数据和最新版的国际参考电离层（IRI-2020）模拟结果，对昆明地区电离层总电子含量（TEC）在太阳活动下降年期间的变化特征及与模型输出进行对比研究。结果表明, 昆明TEC存在明显的春秋高值、夏冬低值的半年异常；白天高值、夜间低值的日变化特点突出，日峰值出现在06:30－08:00 UT（约13:00－15:00 LT）；TEC随太阳活动减弱而明显下降，年平均峰值在2016－2019年分别为48，33，27 ...
刘 国其 +7 more
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Landscape‐scale predictions of future grassland conversion to cropland or development
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Grassland conservation planning often focuses on high‐risk landscapes, but many grassland conversion models are not designed to optimize conservation planning because they lack multidimensional risk assessments and are misaligned with ecological and conservation delivery scales.
Kevin W. Barnes +2 more
wiley +1 more source
Understanding and minimizing environmental impacts of the Belt and Road Initiative
Conservation Biology, Volume 33, Issue 4, Page 883-894, August 2019., 2019 Abstract China's Belt and Road Initiative (BRI) sets to create connections and build infrastructure across Eurasia, Asia, and parts of the African continent in its initial phase and is the largest infrastructure project of all time. Any infrastructure project on this scale will necessarily pass through ecofragile regions and key biodiversity areas ...
Alice C. Hughes
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2017 利用现有势函数构造基于Metaball的过渡曲线，此过渡曲线无法兼具拟高阶连续性与形状可调性.针对这一问题，巧妙地从一种带形状参数的曲线模型出发，构造一类带形状参数的有理势函数，并研究该势函数的性质.所构造的有理势函数具有统一的数学模型，不仅能使过渡曲线在端点处达到拟Ck连续，而且还可通过修改形状参数的值调整过渡曲线的形状.实例表明，通过调整有理势函数的次数及形状参数的取值可构造出满足不同拟连续性且形状不同的过渡曲线，以满足实际应用需要.
LIJuncheng(李军成) +1 more
doaj +1 more source
Methods in Ecology and Evolution, Volume 15, Issue 11, Page 1926-1939, November 2024.Abstract Simulation studies are essential tools to assess statistical methods. Functioning as controlled experiments, simulations generate data from known underlying processes. However, unclear or incomplete reporting of simulation studies can impact their interpretability and reproducibility, potentially leading to the misuse of statistical methods ...
Coralie Williams +6 more
wiley +1 more source
Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
wiley +1 more source
Veterinary Dermatology, Volume 35, Issue 4, Page 408-417, August 2024.Background – Supplementation of polyunsaturated fatty acids (PUFA) enables dose reduction of prednisolone and ciclosporin in canine atopic dermatitis (cAD). Objective – To determine if oral administration of PUFA can reduce the dose of oclacitinib for cAD. Conclusion – Oral supplementation of PUFA allowed dose reduction of oclacitinib and improved pVAS,
Laura Schäfer, Nina Thom
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Jianzhu Gangjiegou Jinzhan, 2017 为了考察材料本构模型参数对构件滞回性能模拟的影响,利用通用有限元软件ABAQUS对H形截面钢构件绕强轴压弯的滞回特性进行了数值模拟研究,对比分析了Ramberg-Osgood模型应变硬化指数和两折线模型强化率的参数取值对低周往复荷载作用下构件的极限抗弯承载力、极限后性能模拟结果的影响。分析表明,在所研究的材料强化参数变化范围内,构件极限抗弯承载力的相应变化是有限的;但构件的残余位移、耗能能力等大范围塑性变形阶段的模拟结果对两类材料模型强化参数均表现出很强的敏感性。基于以上分析结果 ...
张婉越, 陈以一
doaj
Zhejiang Daxue xuebao. Lixue ban, 2013 台风风场和台风浪数值后报能够有效弥补现场观测资料的不足，对南海海域的海洋经济健康发展具有重要的保障作用.针对不同台风参数模型和全谱海浪模型的联合应用，编制了包括5个台风参数模型的数值模拟程序，以南海海域的台风Ellen(1983)和Dujuan(2003)作为案例，并联合应用2个第3代全谱海浪模型，完成了台风风场、气压场和台风浪场的数值后报.通过分析不同台风参数模型和全谱海浪模型组合应用的后报结果，并与实测数据进行对比 ...
XIELiu-ye(谢鎏晔) +2 more
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