... about sustainability This book 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 ... puzzle were put together into the first draft of this book Getting to the formal cause, I would like to begin the list of people who were instrumental in shaping my understanding of complexity ... understanding When operating in a normal mode, scientists are used to having the privilege of picking up the best experimental setting for studying what they want to study, and in doing so, they...
Ngày tải lên: 11/08/2014, 21:21
... Multiple-Antenna Technologies In point -to- point wireless links, the primary design objective is to increase the data rate, and a promising way to so (without increasing the bandwidth and power ... mappings to support data radio bearer in UMTS An example of packet-switched data connection setup in UMTS with low traffic volume A schematic diagram illustrating the scheduling mechanism in UMTS ... more efficient to use a routing protocol that is channel-adaptive—judiciously selecting links that can transmit at higher data rates to form a route Devising channel-adaptive routing protocols is...
Ngày tải lên: 01/06/2014, 07:54
Báo cáo hóa học: " Adaptive selection of antenna grouping and beamforming for MIMO systems" ppt
... 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 ... · 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), ... grouping is given by S1 = {1,4} and S2 = {2, 3}, then we then have ⎤ ⎡ a0 ⎢0 c ⎥ ⎥ ⎢ WAG = ⎣ (6) d⎦ b0 In the beamforming mode, we use the right singular vector corresponding to the maximum singular...
Ngày tải lên: 20/06/2014, 22:20
Báo cáo hóa học: " Vector perturbation based adaptive distributed precoding scheme with limited feedback for CoMP systems" docx
... predefined order known to the users and to the BSs In each frame, the user calculates the received SNR according to the perturbation vector used in this frame and the precoding vector used in the ... after receiving the adjustment factor index feedback, each coordinated BS updates the precoding n−1 vector tn based on the precoding vector tk used in the k previous frame according to (9), which ... the PMI back to the serving BS according to the local CSI from the serving BS to the user The precoding vector for each coordinated BS is given as follows Both the user and the coordinated BSs...
Ngày tải lên: 21/06/2014, 03:20
Báo cáo hóa học: " Research Article Capacity Performance of Adaptive Receive Antenna Subarray Formation for MIMO Systems" pdf
... (48) Intuitively, RHC-ASF follows the notion of equal gain combining A similar procedure for obtaining a phase-shiftonly RF preprocessing technique has been followed in [20] SIMULATION RESULTS In ... 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 ... 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...
Ngày tải lên: 22/06/2014, 06:20
Báo cáo hóa học: " Research Article Channel Impulse Response Length and Noise Variance Estimation for OFDM Systems with Adaptive Guard Interval" docx
... 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, ... factor γ is selected to be too large for the simulated SNR in [3] In order just to demonstrate the advantage of the adaptive penalty factor technique, which has been proposed in our algorithm, in ... (I) (L) according to (8); (2) find L(I) = L, where f (I) (L) has a minimum; f ,min (3) compare L(I) with NK − If L(I) = NK − 1, f ,min f ,min then go to Step Otherwise, the following steps must...
Ngày tải lên: 22/06/2014, 22:20
Báo cáo hóa học: " A Reconfigurable Spiral Antenna for Adaptive MIMO Systems" docx
... antenna feed lines, has been limited to routing the RF signal feeding the antennas In this work, we integrate a number of RFMEMS actuators within the geometrical structure of the antenna to construct ... led a research/development team in transferring semiconductor chip technology to manufacturing in IBM In 1988, he joined the University of California (UCI), Irvine, where he is currently a Professor ... 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...
Ngày tải lên: 23/06/2014, 00:20
Báo cáo y học: "Networked Research buffering: a basic mechanism for distributed robustness in complex adaptive systems" pptx
... about by changes in the global climate, it is becoming increasingly important to understand what enables ecosystems to be resilient, i.e to tolerate disturbances without shifting into qualitatively ... 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 ... protein i can functionally contribute to trait j (i.e bind to protein target j) and zero otherwise In our experiments, each gene expresses a single protein (i.e there is no alternative splicing) To...
Ngày tải lên: 13/08/2014, 16:20
agent-based model selection framework for complex adaptive systems
... theme running throughout this dissertation; modeling pertains to an attempt to figure out what is going on in the real world, and the data is used to infer the processes and structures underlying the ... this town made it really easy to mingle in and get to know local people in private or business contexts Finally, I thank Tomi, my colleague, long time partner and best friend, not only for fixing ... of all for introducing me to research communities that integrate computing with other disciplines, such as decision making, learning, language and evolution, and ecology I am grateful to ASLA Fulbright...
Ngày tải lên: 13/11/2014, 11:02
Dynamic scheduling techniques for adaptive applications on real time embedded systems
... starting time of the first task to be The objective of the optional cycle decision is to maximize the total QoS value represented in (3.7), subject to constraints in (4.2)-(4.5) According to [67], ... reliability is ensured In view of this, adaptive applications are gaining growing attentions owing to their capabilities to provide the scalable execution quality in reaction to the execution environment ... depending on available DVS frequencies, but turns continuous within the range, leading to substantially increased design complexities and optimization costs Besides the intrinsic complexity in adaptive...
Ngày tải lên: 10/09/2015, 15:52
Design of adaptive and hybrid energy QOS aware heterogeneous multiprocessor scheduling strategies for embedded systems
... College in 2002 [6] to distinguish a class of personal wireless networks for physiological monitoring from the more generic Wireless Sensor Networks (WSN) The key distinguishing factor being the ... (micro-processor/controller) is referred to as sink Consequently, we have the following four combinations: SSSS (Single Source Single Sink) SSMS (Single Source Multiple Sink) MSSS (Multiple Source Single Sink) MSMS (Multiple ... potential draw back to PVS is that the battery monitor requires additional hardware circuitry to be built into the sensor node leading to an increase in cost, size and complexity of the sensor node Also...
Ngày tải lên: 04/10/2015, 15:44
A Study of Channel Estimation for OFDM Systems and System Capacity for MIMO-OFDM Systems
... estimator has about to 12 dB SNR gain over that of LS estimator However, the main shortcoming of the MMSE estimator is the higher computation complexity With the increase of operation points, ... P _in, the output signal is linearly proportional to the input signal However, when the input power exceeds P _in, the output signal will be compressed To illustrate the spectrum leak of the input ... low convergence speed since they often need a large amount of receiving data to obtain some statistical information such as cyclostationarity induced by the cyclic prefix Blind channel estimation...
Ngày tải lên: 20/11/2012, 11:28
Free Software tools for embedded systems
... Crosscompiling toolchains Summary Building a toolchain by yourself Tough and very long to master Ready to use toolchains Available from several locations for most platforms Tools to build toolchains: Buildroot and Crosstool ... 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 ... http://scratchbox.org/ A crosscompiling toolkit project Makes it easier to crosscompile a complete embedded Linux system Works by allowing tools to be crosscompiled in a transparent way, making building tools believe they are doing a native ...
Ngày tải lên: 20/10/2013, 00:15
techniques for adaptive control - vance vandoren
... 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 ... Documenting the performance of Intelligence Systems Putting it all together: combining intelligent technologies for process control Results: using intelligent control in the mineral-processing ... measurements back into the process as inputs (after subtracting the setpoint), giving the control law a chance to impose a mathematical relationship on the input/output data that has nothing to with the...
Ngày tải lên: 12/12/2013, 22:42
Tài liệu C Programming for Embedded Systems docx
... as to be involved in the hardware development process, the opportunity to influence the design is too important to pass over Wish-list items to ask for include the following A Built -in Debug Interface ... way, between interrupt and main-line code To provide complete protection, the compiler needs to use indivisible instructions, or to disable interrupts temporarily, to protect the main-line code Synchronous ... being itself interrupted A vectored machine then reads the address contained at the appropriate interrupt vector It jumps to the address and begins executing the ISR code In contrast, a nonvectored...
Ngày tải lên: 22/12/2013, 02:17
Tài liệu An Introduction to Intelligent and Autonomous Control-Chapter 2: A Reference Model Architecture for Intelligent Systems Design pdf
Ngày tải lên: 26/01/2014, 07:20