Results 121 to 130 of about 30,768 (254)
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
Association of insulin signaling pathway-related gene polymorphisms and gene-gene interactions with MAFLD in obese children. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023 Xiao X +5 more
europepmc +1 more source
, 1997 休眠卵是轮虫在恶劣生态条件下形成的滞育结构。本研究用光学显微镜和扫描电子显微镜对东湖14种轮虫休眠卵形态进行了观察，其中关于尾突臂尾轮虫（Brachionuscaudatus，Barrois＆Daday）、方形臂尾轮虫（Bquadridentatus，hermann）、中型晶囊轮虫（Asplanchnaintermedia，Hudson）、顶生三肢轮虫（Filiniaterminalis，Plate）的休眠卵的形态特征尚未见过报道。这些休眠卵一般卵壳较厚，颜色较深，壳表面有纹饰。不同种轮虫的休眠卵形态、
林里,周洁,黄祥飞
core
Conservation Biology, EarlyView.Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2008 目的探讨FⅫ基因exon146C/T基因多态性与血栓形成的关联性。方法采用PCR-RFLP法鉴定了92例血栓性脑梗塞患者和87例静脉血栓患者及129例健康人的FⅫ基因exon146C/T基因型及C、T等位基因分布频率,采用多元Logistic非条件回归分析方法,进行多因素分析,解析FⅫ基因46C/T多态性与血栓性脑梗塞、静脉血栓形成的关联性。结果血栓性脑梗塞组和静脉血栓组的C等位基因分布频率均高于对照组,血栓性脑梗塞组的C/C基因型在血栓形成中的危险性是T/T基因型的14.533倍,具有统计学意义 ...
张玲 +5 more
doaj
[Association Between Apolipoprotein C-3 SstⅠ Polymorphism and Serum Lipids in Patients With Gestational Diabetes Mellitus]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue Ban, 2023 Tang F +9 more
europepmc +1 more source
Study on Ensemble Algorithm for Multi-class Gene Microarray Datasets [PDF]
, 2015 集成学习是当前机器学习领域的一个研究热点，具体到多分类问题，旨在通过一组差异的分类器共同解决起初的多分类问题，然后经过大多数投票等策略将各个分类器的输出结果进行融合。集成多分类算法相比于单个的优秀分类器往往性能上更准确、更稳定，同时还具有更强的泛化能力。在解决多分类问题时，基于纠错输出编码算法（ECOC）。这是解决多分类问题的一种灵活、高效的算法框架，关键要点是将多分类转变为多个二分类问题。此外，遗传规划算法可用于解决二分类问题，通过进化计算得到准确的分类规则。本文在已有的研究基础上 ...
曾志浩
core
Effects of political identity activation and inaccurate metaperceptions on attitudes toward wolves
Conservation Biology, EarlyView.Abstract Polarization between groups can undermine durable conservation outcomes. Activating group identities (i.e., an individual's sense of self derived from membership in a group) can exacerbate differences, especially when people hold inaccurate perceptions of their peers and rivals.
Alexander L. Metcalf, Justin W. Angle
wiley +1 more source
野生动物学报, 2012 近年来,威海一直致力于生态城市的建设。物种多样性是生态城市的重要指标,而在物种多样性中,城市鸟类多样性起着重要的作用。本文调查了冬季威海7个斑块（2个校园和5个典型生活小区）的鸟类多样性,对其物种多样性指数以及均匀度指数进行分析,得出山东大学校园和哈尔滨工业大学校园的鸟类多样性高于5个小区斑块,而且2个校园斑块的均匀度在7个斑块中也处于较高水平。另外,结合实际情况,文章从绿化面积、城市栖息地的空间异质性、生境破碎化程度以及人为干扰4个方面对城市鸟类丰富度与多样性的影响因素做出讨论 ...
高伟 +5 more
doaj
[Aldehyde dehydrogenase 2 rs671 genetic polymorphisms are associated with chemotherapy-induced nausea and vomiting]. [PDF]
Nan Fang Yi Ke Da Xue Xue Bao, 2023 Yang Q, Liu X, Jiang Y, Ma J.
europepmc +1 more source