Results 21 to 30 of about 1,281,694 (159)
, 2009 介绍SNS开放平台及其应用相关概念，分析开放平台应用现状和运营模式，基于国内此类软件的统计数据，采用DTW算法度量变长时序数据的形状相似性，使用一维序列变换改进K中心点聚类的簇中心计算方法，并对数据进行时间序列聚类挖掘 ...
裴珊珊, 叶小梁
core
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 1, Page 88-98, July 2026.ABSTRACT Objective To identify prenatal predictors of tuberous sclerosis complex (TSC) in fetuses with one or more cardiac rhabdomyomas (CR), evaluate an integrated multimodal diagnostic workflow using fetal magnetic resonance imaging (MRI) and trio whole‐exome sequencing (trio‐WES) and characterize perinatal outcomes.
X. Cai +8 more
wiley +1 more source
, 2000 生物体的DNA序列作为生命的源泉控制着生物体遗传和变异的过程。对由A,C,G,T(U)4个字母组成的一维符号(DNA)序列的解释是生物信息学的主要问题。混沌游戏表示(CGR)是将一维符号序列投影到二维平面上,提供寻求图斑信息的一种技术。这种图斑信息以单个核苷酸、两个核苷酸和三个核苷酸出现的频率来理解。CGR可以进一步用于分析氨基酸序列。对于一个低维混沌系统 ...
武作兵
core +1 more source
Integrative Conservation, Volume 5, Issue 2, Page 217-224, June 2026.This study reconstructs the phylogeny of the Javan Hawk‐Eagle (Nisaetus bartelsi) within the subfamily Aquilinae using Maximum Likelihood and Bayesian Inference algorithms on a blood sample and GenBank data. The analysis reveals that the sampled genus Nisaetus forms a monophyletic group. Furthermore, N. bartelsi occupies a sister‐taxon of N.
Almas Lathifatul Ula +3 more
wiley +1 more source
四川大学学报. 自然科学版, 2005 人类基因组计划中的DNA序列图谱是生命科学和基因工程中的伟大成就.要解译隐藏在基因组中的生物信息还有一段很长的路要走.这是因为DNA序列的结构很难分析和识别.作者提出一种用于DNA序列结构分析的特征抽取方法.这种方法采用DNA序列码序的共生概率来抽取高维特征.然后采用相关法和/或贝叶斯分类器来分类结构模式.一些仿真试验的结果表明这种方法适合于DNA序列的结构分析。
罗代升, 膝奇志, 余艳梅
doaj
Methods in Ecology and Evolution, Volume 17, Issue 6, Page 1896-1909, June 2026.Abstract Molecular identification of insect food webs can accurately reveal complex trophic interactions and serve as a foundation for understanding ecosystem functioning and advancing biodiversity conservation. This process typically involves DNA library construction, high‐throughput sequencing and subsequent steps, including data assembly, annotation,
Xiao‐man Zhang +9 more
wiley +1 more source
, 2008 序列密码的安全性分析，具有非常重要的理论研究价值和实际应用价值。多年来，它一直是热点研究课题。序列密码的安全分析，不但是序列密码分析者的职责，而且还是序列密码设计者非常关注的研究课题。 本文对现有的序列密码分析方法作了一定的调查与研究，在此基础上对欧洲序列密码计划eSTREAM 计划的一些候选序列密码和新序列密码结构进行了分析，得出了一些有意义的结果。 本文的主要结果有： （1）对Achterbahn 算法系列的分析。Achterbahn 共有3 个版本：Achterbahn ...
黄小莉
core +1 more source
野生动物学报, 2011 对黑颈鹤病原菌进行快速鉴定及毒力因子分析。采用16S rRNA序列分析法鉴定黑颈鹤病原菌,其毒力基因分别用大肠杆菌的irp2、papC、iucD、tsh、iss毒力基因的特异性引物进行PCR检测,并将扩增出来的irp2基因序列与GenbankTM相应序列进行同源性分析。分离菌株鉴定为大肠埃希氏菌,鉴定结果与生化检测结果一致,分离菌携带irp2毒力基因,这从毒力试验得到证实,其序列与与GenbankTM上发表的HPI irp2基因序列同源性高达98%以上。采用16S ...
余绍华, 陈武, 莫卓东
doaj
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 4, Page 492-499, April 2026.ABSTRACT Objectives To assess the value of placental insufficiency markers for estimating the risk of genetic anomalies in fetuses with isolated early‐onset fetal growth restriction (FGR), defined as an estimated fetal weight ≤ 3rd percentile diagnosed ≤ 28 + 6 weeks' gestation.
M. Armengol‐Alsina +17 more
wiley +1 more source
Methods in Ecology and Evolution, Volume 17, Issue 4, Page 1143-1160, April 2026.Abstract DNA barcode‐based species identification has become pivotal in biodiversity research. Current barcoding‐based deep learning methods have advantages in species identification but exhibit significant limitations. By using COI barcoding alone, previous studies were unable to fully capture species identification features. Prior methods showed that
Bin Ye +4 more
wiley +1 more source