Results 51 to 60 of about 8,473 (140)
Haiyang yu huzhao海气湍动能通量刻画了海气之间湍动能的交换过程，同时包含着大气湍流相干结构的重要信息。基于广东茂名附近海上观测塔2012年2月15日至5月8日的实测大气湍流数据以及同步波浪测量数据，研究并对比了低风速情况下不同海浪条件和大气稳定度对海气界面湍动能通量的影响规律，采用谱分析和概率统计方法定量地展示了这些影响的显著性和幅度特征。结果表明，涌浪情况下，湍动能通量协谱和Ogive曲线上会出现相应受影响区域，涌浪能够导致湍动能通量的减小。通过对通量归一化和正、负贡献量的提取发现：在相同风速下 ...
谭 超, 宋 金宝, 刘 长龙
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Zhejiang Daxue xuebao. Lixue ban, 2008 采用PCR技术获得了唇(Hemibarbus labeo )和花（H. maculatus）线粒体DNA细胞色素氧化酶(COⅡ)基因部分序列，将所得的COⅡ基因序列与4种取自GenBank的属鱼类同一基因序列进行了分析，以探讨这一序列在种质鉴定、种群遗传结构和分子系统发生研究中的应用价值.测序结果表明，在实际分析的600 bp序列中，序列A+T含量(56.9%~57.8%)高于G+C含量，物种间共有变异位点116个，其中简约信息位点46个；唇和花2个地理种群间变异位点均为11个，唇种群间碱基替换均为转换，
LÜYao-ping(吕耀平) +3 more
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Information &Functional Materials, EarlyView.Piezoelectric materials are reviewed as active platforms for medical ultrasound, bridging electromechanical fundamentals, transducer architectures, and biomedical applications. Material–device co‐design is emphasized as the key to high‐performance diagnosis, therapy, monitoring, wearable ultrasound, and emerging ultrasound‐responsive functions ...
Jianan Li, Qing Wan
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Maternal and infant gut microbiome
iMeta, EarlyView.The maternal–infant continuum involves critical windows of host–microbiota co‐adaptation. Preconception, maternal and paternal microbiomes modulate immunity and reproduction. During pregnancy, a gut–placenta axis emerges, where microbial metabolites influence fetal growth or contribute to complications like gestational diabetes mellitus (GDM ...
Huidi Wang +25 more
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Results of neonatal screening for congenital hypothyroidism and hyperphenylalaninemia in Zhejiang province from 1999 to 2022. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue Ban, 2023 Zhou D +7 more
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野生动物学报, 1990 中国大鲵（Andrias davidianus）据文献记载分布区域较广。主要分布在河北、河南、山西、陕西、甘肃、青海、四川、贵州、湖北、安徽、江苏、浙江、江西、湖南、福建、广东和广西。作者在近几年对浙江九龙山自然保护区两栖动物考察时,对中国大鲵进行了初步的生态调查及饲养观察,
刘宝和
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Land Degradation &Development, EarlyView.ABSTRACT Freeze–thaw processes are important drivers of land degradation in cold regions, and soil freezing temperature and unfrozen water content are key parameters for characterizing soil hydrothermal conditions and water phase transitions during freezing.
Shanbo Han +5 more
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投喂频率对横带髭鲷
Haiyang yu huzhao为探究投喂频率对横带髭鲷幼鱼生长性能、营养成分、消化酶活性及消化系统形态结构的影响，选用初始体重为(7.13±0.93) g的活力较好幼鱼，随机分为4组，每组3个重复，每个重复20尾鱼。4个实验组的投喂频率分别是1次/d (F1)、2次/d (F2)、3次/d (F3)、4次/d (F4)，试验持续8周。结果表明，随着投喂频率增加，终末体重、增重率、特定生长率、摄食率均有所上升，但F3和F4组没有显著差异，F4组较F1组终末体重增加了8.29 g、增重率提高了63%、摄食率提高了20 ...
平 洪领 +5 more
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Ultra‐Fast and Energy‐Efficient PZT Optical Tunable Delay Lines for Programmable Photonic Systems
Laser &Photonics Reviews, EarlyView.Thin‐film PZT enables optical tunable delay lines that simultaneously offer sub‐nanosecond switching, low propagation loss, and zero‐static‐power programmability. A five‐bit on‐chip delay line provides a maximum delay of 387.5 ps with a resolution of 12.5 ps, while reconfigurable MZI splitting ratios further enable non‐volatile optical arbitrary ...
Cunyu Shi +11 more
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Gaoya dianqi, 2013 浙江首座配送式智能变电站进入二次设备出厂联调阶段2013年4月19日,绍兴电力局和浙江公司电科院、火电建设公司及南瑞科技、南瑞继保等的工程技术人员聚集在南瑞科技公司,对绍兴220 kV袍南站二次设备进行出厂测试联调,220 kV袍南变电站是浙江省首座配送式智能变电站。220 kV袍南变电站位于浙江省绍兴市袍江新区境内,计划2013年6月底建成投运 ...
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