نتایج جستجو برای: decresing negative effects of distribution

تعداد نتایج: 21276276  

2013
Pablo D. Reeb Juan P. Steibel

Validating statistical analysis methods for RNA sequencing (RNA-seq) experiments is a complex task. Researchers often find themselves having to decide between competing models or assessing the reliability of results obtained with a designated analysis program. Computer simulation has been the most frequently used procedure to verify the adequacy of a model. However, datasets generated by simula...

Journal: :iranian journal of parasitology 0
mohammad ebrahimipour department of parasitology, school of public health, tehran university of medical sciences (tums), tehran, iran. mehdi nateghpour department of parasitology, school of public health, tehran university of medical sciences (tums), tehran, iran ; national institute of health research, tums, tehran, iran. homa hajjaran department of parasitology, school of public health, tehran university of medical sciences (tums), tehran, iran. gholamhosein edrissian department of parasitology, school of public health, tehran university of medical sciences (tums), tehran, iran. mahmood jalali department of biochemistry, school of medicine, tums, tehran, iran. ahmad raeisi center for disease control and management, ministry of health& medical education, tehran, iran.

background: one of the most important enzymatic disorders that interact with malaria is deficiency of g6pd (gloucose-6-phosphate dehydrogenase). this enzyme protects red blood cells from hydrogen peroxide and other oxidative damages. distribution of this enzyme deficiency usually accompanies with low level distribution of malaria disease in most malarious areas. so this hypothesis may be consid...

Journal: :تحقیقات مالی 0
رضا راعی استاد دانشکده مدیریت، دانشگاه تهران، ایران شاپور محمدی دانشیار دانشکده مدیریت، دانشگاه تهران، ایران علیرضا سارنج استادیار دانشکده مدیریت و حسابداری پردیس فارابی، دانشگاه تهران، ایران

this paper examines regime shifts in tedpix return and volatility and the effects of positive and negative crude oil shocks and gold price fluctuations on stock market shifts behavior using markov switching egarch model with student’s t-distribution. we detect two episodes of series behavior, one relative to low mean/high variance regime namely bear state and the other to high mean/low variance...

Journal: :تحقیقات اقتصادی 0
محسن مهرآرا دانشیار دانشکده ی اقتصاد دانشگاه تهران اکبر سرخوش کارشناس ارشد اقتصاد

in this paper, asymmetric effects of exchange rate fluctuation (according to positive and negative shocks) on real output were investigated. in the meantime, the study of behaviour of real output growth in iran’s economy over the period 1338-1386 was done. in specification of the output growth equation, in spite of considering positive and negative shocks of exchange rate, the effects of other ...

Journal: :journal of sciences islamic republic of iran 0

the empirical bayes estimators of treatment effects in a factorial experiment were derived and their asymptotic properties were explored. it was shown that they were asymptotically optimal and the estimator of the scale parameter had a limiting gamma distribution while the estimators of the factor effects had a limiting multivariate normal distribution. a bootstrap analysis was performed to ill...

پایان نامه :0 1375

the following null hypothesis was proposed: there is no significant difference between the efl students listening comprehension development receiving pictorial cues and those receiving no cuse. to test the null hypothesis, 52 male and femal freshmen students of medicine studing at iran university of medical scinces were randomly selected from a total population of 72 students. to ensure that th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده فنی و مهندسی 1388

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده ادبیات، زبانهای خارجی و تاریخ 1389

اغلب تحقیقات انجام شده در حوزه ی " یادگیری مشارکتی " نشان ازتاثیرات مثبت آن بر موفقیت تحصیلی ، افزایش دانش و توانش زبانی، انگیزه ، تعاملات میان دانش آموزان(مهارتهای گروهی و پذیرش افراد با سطح درسی ضعیفتردر گروه)، و هم چنین علاقه به محیط آموزشی دارد .البته لازم به ذکر است که تحقیقاتی هم حاکی از عدم تاثیر این نوع یادگیری وجود دارد. بر اساس این پیشینه ، پژوهش حاضر به بررسی تاثیر "مدل یادگیری با هم...

Journal: :journal of mining and environment 2015
h.r baghzendani h. aghajani m. solimani

detection of subsurface structures by means of gravity method can be used to determine mass distribution and density contrast of rock units. this distribution could be detected by different geophysical methods, especially gravity method. however, gravity techniques have some drawbacks and can't be always successful in distinguishing subsurface structures. performance of the gravity technique co...

Journal: :International Journal of Pure and Apllied Mathematics 2013

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