energy efficient channel allocation in publish subscribe geosensor networks

... of people arriving in the next decades, mainly in the South, will require a major increase in the flow of investments in agriculture.A dramatic increase in investments in farming will not happen ... reflects a lot of work and traveling to visit the most interesting groups that are doing innovative things related to this subject in various disciplinary and interdisciplinary fields I wrote this book ... process (but using the same set of options) In conclusion, increasing efficiency (that is, doing better according to the picture obtained at a particular point in space and time, in relation to...

Ngày tải lên: 11/08/2014, 21:21

... jointly typical set Channel encoder Generic channel Illustration of channel decoder An M-input, Q-output discrete memoryless channel Binary symmetric channel Binary erasure channel Discrete-input ... fundamental input–output relationship of the linear deterministic channels, Fourier transforms are sometimes useful for gaining additional insights in channel analysis Since the channel impulse ... transform the original wireless fading channels into multipleinput multiple-output (MIMO) wireless fading channels It has been shown [126] that the link capacity can be increased by m = min(nT, nR)...

Ngày tải lên: 01/06/2014, 07:54

... of SVD instead of full CSI Feedback information in antenna grouping is a beamforming vector (Nt×1 vector) plus additional antenna grouping information while required feedback information in eigenmode ... of a channel The BER performance is thus dominated by the minimum singular value We find the minimum singular value of each HAG, and pick the best Hi’s and WAG which maximize the minimum singular ... · d2 min,ag Nr (16) where lmin(HAG), lmax(HAG) are minimum and maximum singular values of HAG dmin ,ag is the minimum Euclidean distance of the transmit constellation in antenna grouping In (15),...

Ngày tải lên: 20/06/2014, 22:20

... vector of the serving BS and uses gradient adaption for coordinated BSs precoding; the precoding vectors of the coordinated BSs are also in phase synchronization with the serving BS So ADP can ... are divided into cellcentral users and cell-edge users according to the large scale channel fading The cell-edge users are defined as CoMP users that are served by the joint processing transmission ... variance s2 Hltl is the channel matrix of the serving BS multiplied by its precoding vector and Hktk(k ≠ 1) is the channel matrix of kth coordinated BS multiplying its precoding vector The received...

Ngày tải lên: 21/06/2014, 03:20

... preprocessing technique for reducing hardware costs has also been introduced in [20], but without grouping antenna elements into subarrays Initially, antenna subarray formation was introduced ... actually formed by choosing a subset of antenna elements, the responses of which are linearly combined and fed to an RF chain Thus, generalized selection combining (i.e., combining the responses of ... which, in fact, is the average channel capacity achieved when employing HS/MRC in a SIMO system with MR receiving antenna elements and k j branches The integral In (x) can be evaluated by [30] n In...

Ngày tải lên: 22/06/2014, 06:20

... multipath channel profile of a time-varying channel In the following, we consider the estimated channel coˇ efficient hk,i corresponding to the ith OFDM symbol and the kth channel tap index If we ... must be, to obtain a precise CIR length This question is solved in the following: observing the case (a) in Figure 5, and taking two special points of f (L) with L = [L f ,min , NP ] into account, ... ratio of the channel variance to the variance of the estimated channel including the channel variance and the noise variance The ratio R is defined in [6] as a constant factor in the interval [0.9...

Ngày tải lên: 22/06/2014, 22:20

... etching such that the SiNx covers only the tips of the metal stubs protruding from the antenna segments (see Figure 1a) We continue fabricating RF-MEMS actuators following the process flow shown in ... Bedri A Cetiner was born in Gazi Magosa, Cyprus, in 1969 He received the Ph.D degree in electronics and communications engineering from the Yildiz Technical University, Istanbul, in 1999 From ... B.S degree in optoelectronics and an M.S degree in optics from the University of Science and Technology of China, in 1994 and 1997, respectively, and a Ph.D degree in electrical engineering and...

Ngày tải lên: 23/06/2014, 00:20

... maintaining system traits, i.e system responses become more distributed while remaining phenotypically cryptic In measuring the magnitude S of state changes for individual gene products, we find ... cellular, and population levels in biology [23] and it is a defining attribute of many communication and signalling systems in the body including those involved in development, immunity, and the ... constraining the settings of the matrix δ This controls how the trait contributions of proteins are able to overlap In the 'redundant model', proteins are placed into subsets in which all proteins...

Ngày tải lên: 13/08/2014, 16:20

... on sound principles Computer modeling is a common research practice and theory testing method within disciplines in which the structures or processes underlying a real-world system of interest ... prominently in machine learning (Kearns, Mansour, Ng, & Roi, 1997) Cognitive scientists and the machine learning community have mostly been concerned with model complexity and overfitting In other ... advanced concepts pertaining to model comparison and selection The chapter is closed by an introduction to the terminology used in the application domain, namely in modeling of land-use and land-cover...

Ngày tải lên: 13/11/2014, 11:02

... this point, Theorem 4.1 is partially proved without considering timing and energy constraints Interestingly, this allocation scheme is immune to timing and energy violations, the reason being their ... adaptive applications and maintaining the energy and timing budgets The proposed framework, as illustrated in Fig 1.3, is capable of covering various adaptive application modelings and platform features, ... mechanism is invoked using compilerinserted commands At the task level, a 3-approximation algorithm [55] is proposed for combined leakage and dynamic energy minimization assuming continuous frequency...

Ngày tải lên: 10/09/2015, 15:52

... BSN in a battery -efficient manner The predominant energy sinks in a modern sensor node are the microprocessor and the radio-frequency (RF) module [6] In line with this, our work considers the energy ... the following four combinations: SSSS (Single Source Single Sink) SSMS (Single Source Multiple Sink) MSSS (Multiple Source Single Sink) MSMS (Multiple Source Multiple Sink) We will now proceed ... three tasks in a strictly decreasing order of current consumption will result in minimum amount of charge getting locked inside the battery, thereby leading to greater amount of charge being available...

Ngày tải lên: 04/10/2015, 15:44

Ngày tải lên: 04/10/2012, 10:24

... The present channel estimation methods generally can be divided into two kinds One kind is based on the pilots and the other is blind channel estimation which does not use pilots Blind channel estimation ... a certain period The block-type can be adopted in slow fading channel, that is, the channel is static within a certain period of OFDM symbols 34 The comb-type pilot pattern is plotted in Fig ... are inserted at some specific subcarriers in each OFDM symbol The comb-type is preferable in fast varying fading channels, that is, the channel varies over two adjacent OFDM symbols but remains...

Ngày tải lên: 20/11/2012, 11:28

... http://www.kernel.org/pub/linux/libs/klibc/ “Kernel C library” Tiny and minimalistic C library designed for use in an initramfs at  boot time (alternative to initrds) Fine for the creation of simple shell scripts ... http://free­electrons.com 47 Wind River Wind River Linux: http://windriver.com/linux/ A lot of embedded and real­time experience from VxWorks Now say they integrate, test and support Linux as rigorously as they do with VxWorks ... http://koansoftware.com ELinOS development toolset, in particular based on Eclipse and the Linux Trace Toolkit Includes FreeToolBox, a freely  downloadable compiling and rootfs  creating toolchain Supports i386, arm and ppc...

Ngày tải lên: 20/10/2013, 00:15

... Systems Putting it all together: combining intelligent technologies for process control Results: using intelligent control in the mineral-processing industry Conclusion References ... law It increases the weighting factors that have proven most effective at minimizing the error while decreasing the others The weighting factors are updated at each sampling interval to include ... infinite number of clockwise encirclements of the origin and none of the À1 point Thus the loop is stable The gain margin is dB (factor of 2) and the phase margin is 60 , apparently indicating...

Ngày tải lên: 12/12/2013, 22:42

... possibility of an interrupt routine being itself interrupted, the microcontroller will disable interrupts while executing an interrupt handler Masking interrupts manually is useful during timing-critical ... generate interrupts upon timeout A serious facet of an interrupt-based solution is the protocol for communication between the interrupts and main-line code Since interrupts and main line are as independent ... easily using C C's breadth of expression is concise and powerful; therefore, each line of code written in C can replace many lines of assembly language Debugging and maintaining code written in C...

Ngày tải lên: 22/12/2013, 02:17

Ngày tải lên: 26/01/2014, 07:20

Ngày tải lên: 26/01/2014, 07:20