نتایج جستجو برای: semi porous channel

تعداد نتایج: 411630  

Journal: :Dalton transactions 2013
Magnus T Johnson Zoran Džolić Mario Cetina Manu Lahtinen Mårten S G Ahlquist Kari Rissanen Lars Öhrström Ola F Wendt

Understanding the mechanism by which advanced materials assemble is essential for the design of new materials with desired properties. Here, we report a method to form chiral, potentially porous materials through spontaneous resolution of conformers of a PCP pincer palladium complex ({2,6-bis[(di-t-butylphosphino)methyl]phenyl}palladium(II)halide). The crystallisation is controlled by weak hydr...

2013
Magnus T. Johnson Zoran Džolić Mario Cetina Manu Lahtinen Mårten S. G. Ahlquist Kari Rissanen Lars Öhrström Ola F. Wendt

Understanding the mechanism by which advanced materials assemble is essential for the design of new materials with desired properties. Here, we report a method to form chiral, potentially porous materials through spontaneous resolution of conformers of a PCP pincer palladium complex ({2,6-bis[(di-t-butylphosphino)methyl]phenyl}palladium(II)halide). The crystallisation is controlled by weak hydr...

Journal: :IEEE Transactions on Signal Processing 2018

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1390

با توجه به پیشرفت روز افزون سیستم های دیجیتال در همه زمینه های فناوری از جمله مخابرات مدرن و از طرف دیگر ماهیت آنالوگ سیگنالهای موجود در طبیعت نیاز بسیار وسیعی به مبدلهای آنالوگ به دیجیتال و دیجیتال به آنالوگ با مشخصات دینامیک و استاتیک مختلف وجود دارد. از آنجا که مبدلهای آنالوگ به دیجیتال مهمترین گلوگاه در مدارات دیجیتال با ورودی آنالوگ محسوب می شوند از این رو تلاشهای فراوانی برای افزایش سرعت ...

Journal: :CoRR 2005
Husheng Li H. Vincent Poor

| The performance of second order statistics (SOS) based semi-blind channel estimation in long-code DS-CDMA systems is analyzed. The covariance matrix of SOS estimates is obtained in the large system limit, and is used to analyze the largesample performance of two SOS based semi-blind channel estimation algorithms. A notion of blind estimation e ciency is also de ned and is examined via simulat...

1998
Luc Deneire Elisabeth de Carvalho Dirk T.M. Slock Dirk Slock

We explore the identifiability conditions for blind and semi-blind multiuser multichannel identification. Starting with the deterministic approach, we compare the identifiability conditions on the channel and the sources of training sequence based channel identification, blind and semi-blind channel identification. Further on, we use the stochastic approach with Gaussian priors for the source s...

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...

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