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Solving inverse problems is central in geosciences and remote sensing. Very often a mechanistic physical model of the system exists that solves the forward problem. Inverting the implied radiative transfer model (RTM) equations numerically implies, however, challenging and computationally demanding problems. Statistical models tackle the inverse problem and predict the biophysical parameter of interest...
Establishing causal relations between random variables from observational data is perhaps the most important challenge in today's Science. In remote sensing and geosciences this is of special relevance to better understand the Earth's system and the complex and elusive interactions between processes. In this paper we explore a framework to derive cause-effect relations from pairs of variables via...
according to Internet of vehicles alliance division strategy, aiming at Cooperative communication [1] among Road Side Unit (RSU)[2]in the one-way road environment cannot explore the ability to share information of moving vehicle in opposite direction, which reduces the limitation of cooperative communication data transmission capacity. This paper proposes a kind of shared relay vehicle selection strategy...
In this paper, we study about fly back and forward converter analyzed it and calculate power factor and efficiency of both the converters. The fly back converter gives good power factor but efficiency is low because of transformer magnetic inductor, which results large core loss which gives less efficiency. The forward converter has good efficiency but the power factor is low because of the input...
Genital mutilation has always been a cure for the latest fashionable disease. From curing club foot and epilepsy to ensuring a faithful wife, it has been the universal remedy. Now is the time to break down the barriers, alter perceptions, and broaden the knowledge of the subject to every thinking human in the civilized world. This talk will explore ways of widening the debate to make genital mutilation...
Due to the widespread research on Software Defined Networks (SDNs), its security has received much attention recently. But most of those attempts consider SDN security from the OpenFlow perspective. To the best of our knowledge, none so far has paid attention to the security analysis and modeling of Forwarding and Control planes Separation Network Structure (FCSNS) in SDN. Therefore, this paper provides...
This paper proposes a system to connect a small wind turbine to the electric grid, which controls the current injected into the mains and it tracks the maximum power of the generator. The proposed system is based on a three-phase diode bridge rectifier, a DC-DC Forward converter that provides electrical isolation, gain and control, and a Full-Bridge inverter, which it is fed in current and it is switched...
One of major problems related with PV-applications is common mode currents. The issue can be solved in two ways: galvanic decoupling of AC-grid and chopping the common mode currents by additional actively controlled circuitry. Flyback converter is good solution for MPPT tracking for PV-modules up to 100–150 W with galvanic decoupling. The problem of designing of this type of converter is that most...
Light Detection and Ranging (LiDAR) is an efficient tool for remote sensing and for target detection. This technology has been used for years with a variety of applications. One of the major challenges in the field of LiDAR is the resolution enhancement. Improvement of the resolution may be achieved by applying the deconvolution of the measured signal with the system response function. However, the...
As a popular social media, micro-blog has been widely accepted and used, so that some people are absorbed in following others to gain so-called convenient information. At the same time rumors and meaningless topics also have opportunity to be irrational spread. To control this phenomenon research on human behavior is of great importance. Supposing follow and forward behaviors based on identify with...
Resource planning is the greatest challenge cloud computing service providers face, because it is difficult to predict future resource demands. Fluctuation in demand coupled with inadequate resource planning causes over-or under-utilization of many resources, resulting in a loss of revenue that has created the need for a more efficient market model. The creation of an Information Technology Exchange...
Three-level technology indeed can solve the problem of electric power transformation which is in the high voltage and heavy load situation. It can effectively reduce harmonic interference. So a new topology which is based on the forward converter and full bridge converter is proposed. The topology can achieve three levels or more. The new topology is called Forward-Mode Bridge-Form Three-Level AC/AC...
Recently, more attention is given to harmonic assessment of nonlinear loads due to the penetration of such devices on power systems which cause detrimental effects to the power system and other users. In order to quantify these distortions precisely, two commonly used topologies for implementation in Personal Computers (PCs) are modeled and accurately assessed. These are forward and flyback converters...
This paper presents high-efficiency standby forward converter integrated with the DC/DC Phase-Shift Full Bridge (PSFB) converter. By sharing one leg of DC/DC PSFB converter, the proposed converter features low-voltage stress, no snubber and zero-voltage switching (ZVS) over the entire load range. Thus, the proposed converter has high-efficiency, especially under half load condition. Furthermore, by...
This paper presents a non cooperative distributed minimum mean square error (MMSE) relay scheme. It is designed for wireless relay networks based on an amplify and forward (AF) strategy for one-source, one-destination pair and N relay nodes. Both broadband noise jamming and channel uncertainty were studied in a wireless relay network under received power constraint. The main contribution of this paper...
This paper presents a FCV powertrain model using a combined forward/backward approach. The advantage and disadvantage of forward-facing approach and backward-facing approach is discussed and a combined approach is presented and used in the modeling of FCV powertrain. The structure of the model is identical with the typical actual FCV powertrain. The model involves with two parts: power calculation...
In this paper, we study the secrecy communication using physical layer security in OFDMA networks. The expressions of secrecy rates and outage probability are derived in OFDMA networks using Decode-and-Forward (DF) strategy. Monte Carlo simulations are carried out to validate our analysis.
Power electronics achieves forward and backward compatibility in electrical domain. Arc welding process needs lateral compatibility for ease of use, utility etc. It needs coherent effort of technique and technology. Efficient arc welding process needs fine and fast dynamic control of energy flow for efficiency, weld quality, productivity, reduced fume generation rate etc. Any mismatch in compatibility...
In this paper, we study the problem of automatic target detection in Weibull clutter and multiple target situations, without any prior knowledge of neither the non-stationary clutter statistics in which the radar operates nor the number of outliers that may be present in the reference window. In doing this, we develop the Forward/Backward Order Statistic Automatic Censoring and Detection Constant...
In this paper, a new isolated dc-dc bidirectional converter is introduced. This converter consists of flyback and forward transformers and only one switch in primary side and one switch in secondary side of transformers. In this converter energy transfers to the output in both on and off switch states and controlled by PWM signal. Therefore implementation of control circuits is easy. Also this converter...
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