نتایج جستجو برای: critical constant

تعداد نتایج: 686787  

As a simple explanation, Internet literacy is a capability constitutive to utilizing the advantages of the Internet. But, due to the constant changes of digital technologies, what kinds of necessary capabilities are required to gain the advantages? In fact, more than focusing on the essential capabilities to benefit users from the Internet advantages, existing perceptions of Internet literacy h...

F. Bardestani, S. R. Adhami,

 In network code setting, a constant dimension code is a set of k-dimensional subspaces of F nq . If F_q n is a nondegenerated symlectic vector space with bilinear form f, an isotropic subspace U of F n q is a subspace that for all x, y ∈ U, f(x, y) = 0. We introduce isotropic subspace codes simply as a set of isotropic subspaces and show how the isotropic property use in decoding process, then...

Journal: :computational methods for differential equations 0
razie shafeii lashkarian department of mathematics, university of alzahra, tehran, iran dariush behmardi sharifabad department of mathematics alzahra university

for the polynomial planar vector fields with a hyperbolic or nilpotent critical point at the origin, the monodromy problem has been solved, but for the strongly degenerate critical points this problem is still open. when the critical point is monodromic, the stability problem or the center- focus problem is an open problem too. in this paper we will consider the polynomial planar vector fields ...

Journal: :The Journal of chemical physics 2008
J Largo M A Miller F Sciortino

We report a simulation study of the gas-liquid critical point for the square-well potential, for values of well width delta as small as 0.005 times the particle diameter sigma. For small delta, the reduced second virial coefficient at the critical point B2*c is found to depend linearly on delta. The observed weak linear dependence is not sufficient to produce any significant observable effect i...

2016
DANIEL J. F. FOX

The space of symplectic connections on a symplectic manifold is a symplectic affine space. M. Cahen and S. Gutt showed that the action of the group of Hamiltonian diffeomorphisms on this space is Hamiltonian and calculated the moment map. This is analogous to, but distinct from, the action of Hamiltonian diffeomorphisms on the space of compatible almost complex structures that motivates study o...

Journal: :SIAM J. Matrix Analysis Applications 2013
W. Kratz Roman Simon Hilscher

An index theorem is a tool for computing the change of the index (i.e., the number of negative eigenvalues) of a symmetric monotone matrix-valued function when its variable passes through a singularity. In 1995, the first author proved an index theorem in which a certain critical matrix coefficient is constant. In this paper, we generalize the above index theorem to the case when this critical ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد 1388

هدف از این تحقیق آگاهی از درد شانه در بدمینتون و تاثیر آن بر عملکرد شانه در بازیکنان نخبه بدمینتون بوده است.این تحقیق بر روی52 بازیکن دختر نخبه بدمینتون که به عنوان نمونه آماری انتخاب شدند،انجام شده است.آزمودنی های مذکور با سابقه عضویت در تیم ملی یا تیم منتخب استان ویا شرکت کننده در حداقل یک دوره مسابقه ملی یا قهرمان کشوری،استانی و حداقل 3 سال فعالیت مداوم در رشته بدمینتون بوده اند.برای جمع آور...

2016
V. Trappe W. Richtering W. Burchard

Critical behavior was studied with a crosslinking system obtained by living anionic polymerization, where the primary chain length was kept constant and the crosslinking density was varied. Gelation was found at a critical ratio of crosslinker

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده مهندسی موادو متالورژی 1393

the aim of this paper is eliminating cr(vi) by natural hap. hap is a inexpensive material which is used from bovine critical bone ash in order to remove heavy metal ions like cr(vi). some experiments in different ph are performed (ph=2,3,7). maximum adsorption was appeared at ph=2, dosage=0.3 gr, c0=10 mg/l. cr(vi) removal depends on ph value and initial amount of cr(vi) result of experiments w...

Journal: :journal of modern processes in manufacturing and production 0
kamyar foroojani zadeh modern manufacturing technologies research center, najafabad branch, islamic azad university, najafabad, iran reza nosouhi modern manufacturing technologies research center, najafabad branch, islamic azad university, najafabad, iran

the suppression of the regenerative chatter phenomenon in turning process via the variation of the frequency and amplitude of the spindle motor excitation is carried out in this research. a programmable inverter is employed for variable periodic excitation of the spindle motor. a set of turning experiments is designed and performed on a number of conical work pieces both in constant spindle spe...

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