Báo cáo hóa học: " Performance evaluation on an air-cooled heat exchanger for alumina nanofluid under laminar flow" pdf

... EXPRESS Open Access Performance evaluation on an air-cooled heat exchanger for alumina nanofluid under laminar flow Tun-Ping Teng 1* , Yi-Hsuan Hung 1 , Tun-Chien Teng 2 and Jyun-Hong Chen 1 Abstract This ... pressure drop and pumping energy. Using nanofluid w ith a high heat convective performance for heat exchange can help reduce the volume of the heat e...

Ngày tải lên: 21/06/2014, 01:20

... devices 0 10 20 30 40 50 60 70 80 P P (%) Mean performance Best performance Wrong performance Figure 5: P p as a function of the number of active devices in the area. with standard de viation σ = 2.5 dB and their values have been quantized ... discuss them and we as- sume that collision resolution is ensured. One simple and ef- fective method based on time backoff is briefly described i...

Ngày tải lên: 22/06/2014, 23:20

... function on a, b,andletg be an increasing function on a, b, such that g  is a continuous function on a, b and α>0. I α a  ;g f denotes the left-sided fractional integral of a function ... be an increasing function on a, b and g  a continuous function on a, b.Theleft- and right-sided fractional integrals of a function f with respect to another function g in a, b...

Ngày tải lên: 21/06/2014, 07:20

... Firstly, under some conditions on A and initial values we found positive solutions and nonnegative equilibriums and then we studied the convergence of the positive solutions to the nonnegative ... stability and asymptotics of some classes of rational difference equations,” Journal of Mathematical Analysis and Applications, vol. 316, no. 1, pp. 60–68, 2006. 21 S. Stevi ´ c, On monotone s...

Ngày tải lên: 21/06/2014, 11:20

... ˆm b (rN p −1)] T , and for any matrix B, the cyclic mean matrix is defined as 3. SAK Jagannatham, BD Rao, Superimposed pilot vs. conventional pilots for channel estimation, in Fortieth Asilomar Conference on ... approaches for channel estimation and synchronization in digital communication links. In this article, we concentrate on the PAPR analysis with DDST and on the spectral re...

Ngày tải lên: 21/06/2014, 23:20

... and Applications 5 This implies that the necessary and sufficient condition for the positivity of the quadratic form ϕ is 5 − √ 5 10 ≤ p ≤ 5  √ 5 10 . 2.16 We thus obtain a sufficient condition ... pages doi:10.1155/2009/491576 Research Article On an Extension of Shapiro’s Cyclic Inequality Nguyen Minh Tuan 1 and Le Quy Thuong 2 1 Department of Mathematical Analysis, University of Hanoi,...

Ngày tải lên: 22/06/2014, 02:20

... throughput performance. For radio transmitter, TORA shows better performance for both utilization and throughput measure, whereas AODV shows average perfor- mance, and DSR shows poor performance. ... TORA shows better performance for successful transmission of packets, while AODV shows better channel utilization. DSR shows an average level of performance in both power and chan...

Ngày tải lên: 22/06/2014, 22:20

... *Corresponding authors: h Performance evaluation of space–time–frequency spreading for MIMO OFDM–CDMA systems Haysam Dahman ∗ and Yousef Shayan Department of Electrical Engineering, Concordia ... M Chiani, D Dardan, Improved exponential bounds and approximation for the Q-function with application to average error probability computation, in Proc. IEEE Global Telecommunications Confere...

Ngày tải lên: 18/06/2014, 22:20

... http://www.jiasociety.org/content/12/1/26 Page 2 of 2 (page number not for citation purposes) ity and equal opportunity, are among the guiding princi- ples of this convention [2]. Research on HIV and disability ... Submission of additional research articles or commentaries on this topic is also warmly wel- comed. References 1. Factsheet on Persons with Disabilities, Enable; UN special...

Ngày tải lên: 20/06/2014, 08:20