نتایج جستجو برای: genetic model

تعداد نتایج: 2627866  

Journal: :iranian journal of applied animal science 2015
k. kheirabadi s. alijani

the aim of the present study was to estimate the genetic parameters and genetic trends of somatic cell score (scs) in the first 3 lactations of iranian holstein cows by random regression (rr) animal model by using restricted maximum likelihood (reml) method. the data set used in this analysis included observations of 340318 test-day records of 41526 cows in 288 herds; 89969 test-day of 11750 co...

Journal: :iranian journal of applied animal science 2015
m.m. mia m.a.m.y. khandoker s.s. husain m.o. faruque d.r. notter

black bengal goat is the heritage and one of the potential genetic resources of bangladesh. genetic and phenotypic parameters for semen characteristics and their relationships with scrotal circumference in black bengal bucks were estimated in this experiment. genetic parameters were estimated by residual maximum likelihood procedure, fitting an animal model ignoring maternal genetic or permanen...

Journal: :پژوهش های علوم دامی ایران 0

in the research the genetic investigation productive and reproductive traits and changes trend the traits in years, seasons and different lactation periods and genetic evaluation cows and bulls of 785 records for milk and 665 records for fat yield and reproductive information during years 1998 to 2003 of 207 dairy cows ghezlagh farm aboureyhan campus (university of tehran) studied. the least sq...

Journal: :مهندسی صنایع 0
جعفر باقری نژاد استادیار دانشکده مهندسی صنایع - دانشگاه الزهرا (س) فریبرز جولای استاد دانشکده مهندسی صنایع -پردیس دانشکده های فنی-دانشگاه تهران زهرا رفیعی مجد کارشناس ارشد مهندسی صنایع - دانشگاه الزهرا (س)

in this study, we present a mrcpsp/max (multi-mode resource-constrained project scheduling problem with minimum and maximum time lags) model with minimization tardiness costs and maximization earliness rewards of activities as objective. the proposed model is nearby to real-world problems and has wide applications in various projects. this problem is not available in the literature exactly and ...

Journal: :shiraz journal of system management 0
mohsen hajiamiri department of industrial engineering, zahedan branch, islamic azad university, zahedan, iran mohammad reza shahraki department of industrial engineering, university of sistan and baluchistan, zahedan, iran seyyed masoud barakati university of sistan and baluchistan, zahedan, iran

the bankruptcy prediction models have long been proposedas a key subject in finance. the present study, therefore, makes aneffort to examine the corporate bankruptcy prediction through employmentof the genetic algorithm model. furthermore, it attempts to evaluatethe strategies to overcome the drawbacks of ordinary methods forbankruptcy prediction through application of genetic algorithms. thesa...

Journal: :علوم دامی 0
علی اکبر قره داغی استادیار ، موسسه تحقیقات علوم دامی کشور شعله قربانی مربی، موسسه تحقیقات علوم دامی کشور محمدعلی کمالی استادیار ، سازمان تحقیقات، آموزش و ترویج کشاورزی مختارعلی عباسی دانشیار، موسسه تحقیقات علوم دامی کشور

the data of this study were collected by indigenous chicken breeding centers in the west azerbaijan for 11 generations. the (co) variance components, heritability's, correlations between traits and breeding values were estimated by multi-trait animal model using wombat software. the genetic trends of traits over 11 generations of selection, using average function of breeding values per gen...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی عمران 1388

چکیده روش های متعددی برای برآورد رواناب حاصل از بارش در حوضه های آبریز وجود دارد. یکی از این روش ها استفاده از مدل های هیدرولوژیکی است. با استفاده از مدل های هیدرولوژیکی و شبیه سازی فرآیندهای هیدرولوژیکی می توان با صرف کمترین زمان و هزینه، رواناب و مولفه های دیگر چرخ? هیدرولوژیکی را برآورد کرد. از آنجا که در حوضه های آبریز اندازه گیری تمام کمیت های مورد نیاز برای تحلیل رواناب ممکن نیست، انتخاب...

In this paper, we develop a capacitated location-covering model considering interval values for demand and service parameters. We also consider flexibility on distance standard for covering demand nodes by the servers. We use the satisfaction degree to represent the constraint of service capacity. The proposed model belongs to the class of mixed integer programming models. Our model can be redu...

Journal: :پژوهش های تولید گیاهی 0
علیرضا نه بندانی دانشجو/دانشگاه علوم کشاورزی و منابع طبیعی گرگان افشین سلطانی استاد دانشگاه علوم کشاورزی و منابع طبیعی گرگان ابراهیم زینلی استاد دانشگاه علوم کشاورزی و منابع طبیعی گرگان سامیه رئیسی عضو هیئت علمی مرکز تحقیقات گرگان روح الله نجفی دانشجوی دانشگاه علوم کشاورزی و منابع طبیعی گرگان

crop simulation models are mathematical representations of plant growth processes as influenced by interactions among genotype, environment and crop management. using crop simulation models can be an efficient complement to experimental research. models are being used to understand the response of crops to possible changes in crop, cultural management and environmental variables.while there are...

Journal: :iranian journal of biotechnology 2007
badraldin ebrahim sayed tabatabaei ghodratollah saeidi mohammad reza sabzalian

the objective of this study was to estimate genetic parameters and to investigate the type of gene action in controlling androgenesis in wheat. two wheat cultivars of grebe and houtman were reciprocally crossed with two synthetic genotypes of do1 and pol and then a complete set of the parents, f1, reciprocal f1 (rf1), f2 and back-cross generations (bc1 and bc2) of each cross were used for anthe...

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