Results 21 to 30 of about 9,183 (179)
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 4, Page 470-477, April 2025.ABSTRACT Objective To evaluate the presence and levels of cytomegalovirus (CMV) cell‐free DNA (cfDNA) fragments in women pregnant with a fetus with symptomatic congenital CMV (cCMV). Methods The study comprised nine women whose fetuses were diagnosed with cCMV between June 2019 and July 2024 at 20 + 4 to 34 + 1 weeks' gestation (n = 8) or neonatally (n
B. H. W. Faas +9 more
wiley +1 more source
Journal of Animal Ecology, Volume 94, Issue 4, Page 745-759, April 2025.Our study reveals how top predators influence mammalian interaction networks by increasing complexity and redistributing interactions through indirect effects. These findings imply the important role of top predators in structuring communities, offering novel insights into the conservation and management of mammal communities in northeastern China ...
Wen She +5 more
wiley +1 more source
He jishu对于反应堆热工水力参数的预测，现有的研究多使用单一神经网络的预测方法，但在噪声较大的情况下，单一神经网络不能很好地剔除噪声的影响。本文使用基于经验模态分解法（Empirical Mode Decomposition，EMD）与奇异谱分析法（Singular Spectrum Analysis，SSA）结合自适应径向基神经网络（Radial Basis Function Neural Network，RBF）的组合模型提高堆芯热工参数瞬态预测的精度。采用1/2中国实验快堆（China ...
赵 梓炎 +4 more
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Conservation Biology, Volume 39, Issue 2, April 2025.Abstract Emerging infectious diseases are increasingly recognized as a significant threat to global biodiversity conservation. Elucidating the relationship between pathogens and the host microbiome could lead to novel approaches for mitigating disease impacts.
Alexander S. Romer +25 more
wiley +1 more source
Jixie chuandong, 2015 针对现有测量方法存在的问题,基于测量状态与加工状态一致的检测原理,设计了环面蜗杆精度测量原理。通过设置自动标定程序和高精密时栅转台使系统自动建立三维空间的测量坐标系,并利用坐标旋转法测得测头的回转半径。采用随动控制方式来测量环面蜗杆各齿面的点在测量坐标系中的坐标值,从而得到环面蜗杆的精度。系统采用金字塔式的结构使系统更稳定、可靠性强。通过实验,验证了本方案的可行性,测得环面蜗杆螺旋线的误差为±4μm。对系统进行等精度重复性实验,系统的极差为0.9μm,方差分析说明各测量点的误差值无显著差异。
陈锡侯 +3 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
Environmental niche models improve species identification in DNA barcoding
Methods in Ecology and Evolution, Volume 15, Issue 12, Page 2343-2358, December 2024.Abstract Recent advances in DNA barcoding have immeasurably advanced global biodiversity research in the last two decades. However, inherent limitations in barcode sequences, such as hybridization, introgression or incomplete lineage sorting can lead to misidentifications when relying solely on barcode sequences.
Cai‐qing Yang +6 more
wiley +1 more source
Guangtongxin yanjiu, 1987 本文通过对P101预制棒测试仪测量原理和软件程序分析,结合实际需要,总结出一种自动化程序较高的程序修改方案。在保证测量精度的情况下,将每点测量时间减少到13分钟,人机对话次数降低为5次。
雷非
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Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 5, Page 635-650, November 2024.ABSTRACT Objectives To reach an international expert consensus on the diagnosis, prognosis and management of fetal lower urinary tract obstruction (LUTO) by means of a Delphi procedure, and to use this to define a core outcome set (COS). Methods A three‐round Delphi procedure was conducted among an international panel of experts in fetal LUTO.
H. J. Mustafa +90 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2019 【目的】评价医学外显子组高通量测序技术用于拷贝数变异（CNV）检测的可行性。【方法】两个不相关的遗传病家系案例，患者除了有智力障碍的类似症状外，无其他明显共同点。通过脆性X染色体综合征基因筛查、染色体G显带技术、染色体微阵列技术以及医学外显子组测序技术等对患者及其家属进行遗传学检测。【结果】在两个家系的患者中均发现染色体拷贝数变异，片段大小从11.4kb到13.03Mb不等。拷贝数变异得到了其他技术的验证。【结论】医学外显子组高通量测序技术用于拷贝数变异相关的遗传病临床辅助诊断是可行的 ...
张彦 +5 more
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