نتایج جستجو برای: term selection

تعداد نتایج: 881919  

Journal: :journal of plant molecular breeding 2014
saumya awasthi jai prakash lal

literatures have reported that a lot of drought related genes were cloned and individual gene showed positive effects under controlled stress experiments, but were not much effective in the field. although, the progresses by conventional breeding approaches were achievable as some drought varieties have been released to the farmers in the recent years but this is not adequate to cope up with th...

Journal: :Genetics 1986
Z B Zeng W G Hill

Long-term selection response could slow down from a decline in genetic variance or in selection differential or both. A model of conflict between truncation and stabilizing selection in infinite population size is analysed in terms of the reduction in selection differential. Under the assumption of a normal phenotypic distribution, the limit to selection is found to be a function of kappa, the ...

Journal: :iranian red crescent medical journal 0
tulay ayyildiz department of pediatric nursing, zonguldak school of nursing, bulent ecevit university, zonguldak, turkey; department of pediatric nursing, zonguldak school of nursing, bulent ecevit university, zonguldak, turkey. tel: +90-3722613377, fax: +90-3722613399 hulya kulakci department of public health nursing, zonguldak school of nursing, bulent ecevit university, zonguldak, turkey ferruh niyazi ayoglu department of public health medical, bulent ecevit university, zonguldak, turkey nihal kalinci newborn service nursing, zonguldak maternity and children’s hospital, zonguldak, turkey funda veren department of public health nursing, zonguldak school of nursing, bulent ecevit university, zonguldak, turkey

conclusions since wetting of umbilical cord during tub bathing delays the separation of umbilical cord, sponge bathing is recommended for newborns until the umbilical cord falls off. results the time of separation of umbilical cord in babies who were given sponge bathing (6.1 ± 1.4) was shorter compared to those given tub bathing (8.3 ± 2.5) (p < 0.005). patients and methods this quasi-experime...

2017
Guozhong Feng Baiguo An Fengqin Yang Han Wang Libiao Zhang

Feature selection is a practical approach for improving the performance of text classification methods by optimizing the feature subsets input to classifiers. In traditional feature selection methods such as information gain and chi-square, the number of documents that contain a particular term (i.e. the document frequency) is often used. However, the frequency of a given term appearing in each...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده برق و کامپیوتر 1390

کیفیت توان یکی از نگرانی های مهم مهندسین سیستم های قدرت میباشد. از طرفی هارمونیک ها به عنوان یکی از پدیده- های کیفیت توان در نظر گرفته میشوند. از این رو شناسایی شکل موج جریان و ولتاژ برای طراحی فیلترها جهت حذف و یا کم کردن اثر هارمونیک ها در یک سیستم قدرت ضروری است. این پایان نامه دو روش جدید برای آشکارسازی هارمونیک ها در سیستم های قدرت ارائه میدهد. اگر چه تخمین پارامترهای هارمونیکی در اثر غیر ...

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