báo cáo hóa học: " On the achievable rates of multiple antenna broadcast channels with feedback-link capacity constraint" doc

... f(x)=e x E n (x)(n ≥ 1) is a monotonically decreasing function. The proofs of these three lemmas are in Appendices 4-6, respectively. Then we have the following theorem on the lower bound of the achievable e ... bounds of the achievable rates with limited feedback. But different from the distortion measure of the angle in [20,21,25], another vector quantization...

Ngày tải lên: 21/06/2014, 02:20

... consequence, the information taken into the brain will be less distinct. In addition, acti- vation of astroglial networks, with induction of Ca 2+ oscil- lations, both within and between the gap junction- coupled ... for disruption of the BBB in neuroinflammation are incom- pletely understood, but appear to involve direct effects of cytokines on endothelial regulation of...

Ngày tải lên: 19/06/2014, 22:20

... that m k n < | a n | . 3. Proof of the theorem Proof of Theorem 1.1.Letm =min |z|=k |p(z)|. If p( z)hasazeroon|z|=k,thenm = 0 and the result follows from Lemma 2.8. Henceforth, we suppose that all the zeros of p(z) ... k. But this result contradicts the fact that |a 1 |>k. Hence, the polynomial D α 1 p(z) must be of degree (n - 1). On the other hand, since all the...

Ngày tải lên: 20/06/2014, 22:20

... 46E40. Keywords: exponential functions, stability, Hilbert-valued function 1. Introduction The stability problem of functional equations goes back to a question of Ulam [1] con- cerning the stability of group ... be exponential with the convolution product. Authors’ contributions All authors carried out the proof. All authors conceived of the study, and participated in its...

Ngày tải lên: 20/06/2014, 22:20

... ≡ 0 because of the continuity of the function ˜ q n1 j on (0, R). In such a case, the elements of the second row of matrix ˜ Q n satisfy the equation l n ( ˜ q n2 j )= 0 . For the same reason as a ... s . (30) The terms  r R  n  | m | ≤n a (k) nm H m n ( ω ) of the series on the right-hand side of (29) are harmonic functions in ∑ R . Since these series con...

Ngày tải lên: 21/06/2014, 00:20

... constellation with energy E r = b 2 r for 1 ≤ r ≤ N B . • N Q groups of QAM symbols. The symbols of e ach group, of size N s , are drawn from a constellation of size Ms, with constellation coefficients ... demonstrates the EVM versus clipping level for the mixture of 128 B PSK modulated tones with constellation energy bo osted by 3 d B, 128 QPSK modulated tones and 256 1...

Ngày tải lên: 21/06/2014, 01:20

... energetics of any alloy with equal numbers of Ge cations and anions as function of the number of bad bonds can be developed. Our QSGW calculations confirm the bowing of the alloy both at the C and ... as input the critical concentration at which the transition takes place, but no restrictions on the formation of Ga–Ga and As–As bonds are imposed. Other models base...

Ngày tải lên: 22/06/2014, 00:20

... reference point in the far-field region of the antenna at a small distance d 0 from the transmitting antenna and n is the path loses com- ponent depending on the environment. In the model, there exists ... our theoretical results have a good matching with that of the simulation. 4. NETWORK CAPACITY As mentioned above, the max-flow capacity is another im- portant...

Ngày tải lên: 22/06/2014, 22:20

... 6:611 http://www.nanoscalereslett.com/content/6/1/611 Page 4 of 6 the lattice of the AlN layer and have the same in-plain lattice constant with the AlN spacer. Therefore, by vary- ing the thickness of the AlN spacer, the strain of ... observed. On the contrary, reduction in either of these two factors will lead to impr ovement of the emis- sion efficiency and...

Ngày tải lên: 20/06/2014, 23:20

... community concerning the benefit of various types of physical therapies. Evolution of physical rehabilitation Historically, the management of stroke survivors involved bed-rest and convalescence, ... function when compared to no treat- ment or control [4]. Yet importantly, superiority of one type of therapy over another could not be distinguished, and therefore that the spec...

Ngày tải lên: 19/06/2014, 08:20