Multilocus genomics of outcrossing plant populations.
- PubMed - NCBI
The NCBI web site requires JavaScript to function.
FormatSummarySummary (text)AbstractAbstract (text)MEDLINEXMLPMID ListChoose DestinationFileClipboardCollectionsE-mailOrderMy BibliographyCitation managerFormatSummary (text)Abstract (text)MEDLINEXMLPMID ListCSVCreate File1 selected item: FormatSummarySummary (text)AbstractAbstract (text)MEDLINEXMLPMID ListMeSH and Other DataE-mailSubjectAdditional textE-mailAdd to ClipboardAdd to CollectionsOrder articlesAdd to My BibliographyGenerate a file for use with external citation management software.Create File
):68-76. doi: 10.1016/j.tpb.. Epub
2009 May 6.Multilocus genomics of outcrossing plant populations.1, , , , , , , .1Department of Epidemiology and Health Policy Research, University of Florida, Gainesville, FL 32611, USA.AbstractThe structure and organization of natural plant populations can be understood by estimating the genetic parameters related to mating behavior, recombination frequency, and gene associations with DNA-based markers typed throughout the genome. We developed a statistical and computational model for estimating and testing these parameters from multilocus data collected in a natural population. This model, constructed by a maximum likelihood approach and implemented within the EM algorithm, is shown to be robust for simultaneously estimating the outcrossing rate, recombination frequencies and linkage disequilibria. The algorithm built with three or more markers allows the characterization of crossover interference in meiosis and high-order disequilibria among different genes, thus providing a powerful tool for illustrating a detailed picture of genetic diversity and organization in natural populations. Computer simulations demonstrate the statistical properties of the proposed model. This multilocus model will be useful for studying the pattern and amount of genetic variation within and among populations to further infer the evolutionary history of a plant species.PMID:
[PubMed - indexed for MEDLINE] Publication TypesMeSH TermsSubstancesGrant SupportFull Text SourcesOther Literature SourcesLibraries
Supplemental Content
External link. Please review our .Time-dependent reliability analysis with joint upcrossing rates_百度文库
两大类热门资源免费畅读
续费一年阅读会员，立省24元！
Time-dependent reliability analysis with joint upcrossing rates
上传于||暂无简介
阅读已结束，如果下载本文需要使用5下载券
想免费下载本文？
下载文档到电脑，查找使用更方便
还剩12页未读，继续阅读
你可能喜欢君，已阅读到文档的结尾了呢~~
多孔无机材料在生物医学和医药领域中的应用
扫扫二维码，随身浏览文档
手机或平板扫扫即可继续访问
多孔无机材料在生物医学和医药领域中的应用
举报该文档为侵权文档。
举报该文档含有违规或不良信息。
反馈该文档无法正常浏览。
举报该文档为重复文档。
推荐理由：
将文档分享至：
分享完整地址
文档地址：
粘贴到BBS或博客
flash地址：
支持嵌入FLASH地址的网站使用
html代码：
&embed src='/DocinViewer-4.swf' width='100%' height='600' type=application/x-shockwave-flash ALLOWFULLSCREEN='true' ALLOWSCRIPTACCESS='always'&&/embed&
450px*300px480px*400px650px*490px
支持嵌入HTML代码的网站使用
您的内容已经提交成功
您所提交的内容需要审核后才能发布，请您等待！
3秒自动关闭窗口From Wikipedia, the free encyclopedia
Zero-crossing in a waveform representing voltage vs. time
A zero-crossing is a point where the sign of a mathematical function changes (e.g. from positive to negative), represented by a crossing of the axis (zero value) in the graph of the function. It is a commonly used term in electronics, mathematics, sound, and image processing.
In , the zero-crossing is the instantaneous point at which there is no
present. In a
or other simple , this normally occurs twice during each .
The zero-crossing is important for systems which send
over AC , such as ,
type systems for
and other AC .
Counting zero-crossings is also a method used in
to estimate the
of speech.
In a system where an amplifier with digitally controlled gain is applied to an input signal, artifacts in the non-zero output signal occur when the gain of the amplifier is abruptly switched between its discrete gain settings. At audio frequencies, such as in modern consumer electronics like , these effects are clearly audible, resulting in a 'zipping' sound when rapidly ramping the gain, or a soft 'click' when a single gain change is made.
are disconcerting and clearly not desirable. If changes are made only at zero-crossings of the input signal, then no matter how the amplifier gain setting changes, the output also remains at zero, thereby minimizing the change. (The instantaneous change in gain will still produce distortion, but will not produce a click.)
If electrical power is to be switched, no
is generated if switched at an instant when there is no current—a zero crossing. Early light
and similar devices ge later versions were designed to switch at the zero crossing.
In the field of
, great emphasis is placed on operators which seek out edges within an image. They are called 'Edge Detection' or 'Gradient filters'. A
is a filter which seeks out areas of rapid change in pixel value. These points usually mark an edge or a boundary. A Laplace filter is a filter which fits in this family, though it sets about the task in a different way. It seeks out points in the signal stream where the digital signal of an image passes through a pre-set '0' value, and marks this out as a potential edge point. Because the signal has crossed through the point of zero, it is called a zero-crossing. An example can be found , including the source in Java.Short-time-zero-crossing-rate 基于MATLAB用于检测提取的语音信号的平均短时过零率的算法，可以方便的 出是清音还
238万源代码下载-
&文件名称: Short-time-zero-crossing-rate
& & & & &&]
&&所属分类:
&&开发工具: matlab
&&文件大小: 1 KB
&&上传时间:
&&下载次数: 6
&&提 供 者:
&详细说明：基于MATLAB用于检测提取的语音信号的平均短时过零率的算法，可以方便的检测出是清音还是浊音。-Algorithm based on the MATLAB for detecting extracted speech signal average short-term zero-crossing rate, you can easily detect the voiceless or voiced.
文件列表(点击判断是否您需要的文件，如果是垃圾请在下面评价投诉):
&&Short-time zero-crossing rate.txt
&近期下载过的用户:
&输入关键字，在本站238万海量源码库中尽情搜索：
&[] - 利用stm32两路pwm输出作为编码器接口两路输入信号，计数结果可用串口显示，pwm信号可用逻辑分析仪显示
&[] - 声语音连续语音语料库，包含用于语音识别培训和测试的数据
&[] - 读取语音信号，提取轻音与浊音的频谱，使用不同窗函数
&[] - 关于过零点检测的文章，个人感觉不错，与大家分享
&[] - 基于CCS软件仿真的语音端点检测。采用短时能量和平均过零率。