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This paper puts forth a vision for scalable distribution grid integration of energy resources such as rooftop photovoltaics (PVs) and electric vehicles (EVs). The output of these resources vary temporally in an unpredicted manner. Therefore, they bring substantial challenges to utilities vis-a-vis massive deployment of such resources. By leveraging the fact that most of the distributed energy resources...
Fault detection of shorted turns in the stator windings of Induction Motors (IMs) is possible in a variety of ways. As current sensors are usually installed together with the IMs for control and protection purposes, using stator current for fault detection has become a common practice nowadays, as it is much cheaper than installing additional sensors. In this study, stator currents from the healthy...
With the increase in data volumes, it is prudent to classify data depending on its criticality. One might prefer a cheap storage for a year old system logs but a highly fault tolerant storage for personal photos. The existing solutions include storing these two sets of data in two different systems or choosing a system with a fault tolerance level required by the most critical data. This means a higher...
The National Aeronautics and Space Administration (NASA) in the United States and the Indian Space Research Organisation (ISRO) are developing a synthetic aperture radar (SAR) mission to map Earth's surface every 12 days, known as the NASA-ISRO SAR (NISAR) Mission. NISAR has completed its preliminary design and successfully passed its Preliminary Design Review in June 2016. This paper describes the...
Intense, ultra-broadband terahertz (THz) pulses can drive major advances in ultrafast dynamics, nonlinear THz optics, and bio-material imaging [1,2]. Single and two-color filamentation of ultrashort laser pulses in gases have been extensively used for the generation of such pulses [3,4]. However, filament formation in gases is hindered by the need of high laser pulse energies, motivating the exploration...
Belief space planning is concerned with the problem of finding the control policy under process and measurement uncertainties. Formulated as a stochastic control problem, the solution of a general Decentralized Partially Observed Markov Decision Process (Dec-POMDP) is a collection of feedback policies for individual agents, maximizing a joint value function. In this paper, we design (m) number of...
Planning under motion and observation uncertainties requires the solution of a stochastic control problem in the space of feedback policies. In this paper, by restricting the policy class to the linear feedback polices, we reduce the general (n2 + n)-dimensional belief space planning problem to an (n)-dimensional problem. As opposed to the previous literature that search in the space of open-loop...
In this paper, a novel Micro Electro Mechanical System (MEMS) based cantilever beam of cross section (400×150×1)μm is presented for the detection of Metronidazole (MZN) which can be used in food processing industry to detect its toxicity level in meat. MZN is a drug that is proven to be carcinogenic if used as feed addictive for cattle breeding or aquafarming. Molecular imprinted Gold cantilever beam...
This paper present and analyze an energy efficient data compression and data aggregation algorithm which results in the whole network lifetime prolonged by about 24%. In this paper, a new idea is proposed for sensor values compression based on a technique that involves feedback mechanism. In this technique, the base node in the sensor network generates Huffman code for the sensor data that needs to...
The present paper proposes a new approach for color fabric texture classification based on the occurrences of alphabet patterns. Generally, Patterns are identified on grey level image but the present approach identifies the patterns on RGB color image. The present approach identify the patterns on 3 color channel i.e. Red channel, Green channel and Blue channel. The present approach uses alphabet...
In cyber-physical systems, state estimation errors can be caused not just by process noise or measurement noise in sensors, but also by errors in the communication network. Jitter in packet delivery over a communication network carrying sensor measurements can result in timing errors which result in large outlier type state estimation errors, such as, for example, velocity estimation errors in vehicular...
We address the problem of security of cyber-physical systems where some sensors may be malicious. We consider a multiple-input, multiple-output stochastic linear dynamical system controlled over a network of communication and computational nodes which contains (i) a controller that computes the inputs to be applied to the physical plant, (ii) actuators that apply these inputs to the plant, and (iii)...
In this paper a new approach is proposed to classify leafs in efficient and effective manner. In this approach, the features are extracted from edges of the leaf images and it is used two kinds of features which are edge based and shape based features for leaf classification. When the present method is tested on Flavia dataset, it gives the average classification accuracy rate of 94.37%. The Flavia...
This paper presents a new methodology to detect low-frequency oscillations in power grids by use of time-synchronized data from phasor measurement units (PMUs). Principal component analysis (PCA) is first applied to the massive PMU data to extract the low-dimensional features, i.e., the principal components (PCs). Then, based on persistent homology, a cyclicity response function is proposed to detect...
In this paper a monolithic radar absorbing composite based on the fabric based multilayer laminates have been designed and fabricated. The multilayer laminate consists of the glass and carbon based fabrics along with lossy dielectric fillers in the epoxy medium. The individual laminates have been fabricated using vaccum bagging technology and their constitutive electromagnetic properties e.g. dielectric...
For networked cyber-physical systems to proliferate, it is important to ensure that the resulting control system is secure. We consider a physical plant, abstracted as a single-input-single-output stochastic linear dynamical system, in which a sensor node can exhibit malicious behavior. A malicious sensor may report false or distorted sensor measurements. For such compromised systems, we propose a...
This paper presents the technical challenges associated with the proposed control techniques and an analysis performance of speed control of permanent magnet synchronous motor (PMSM), their control strategies and advance power electronics technologies to control PMSM. To control of PMSM drive used different control methods like, scalar control, direct torque control (DTC), vector control, frequency...
We consider a prototypical intelligent transportation system with a control law that is specifically designed to avoid collisions. We experimentally demonstrate that, nevertheless, an attack on a position sensor can result in collisions between vehicles. This is a consequence of the feeding of malicious sensor measurements to the controller and the collision avoidance module built into the system...
OFDM has been recognized as a suitable candidate for cognitive radio systems. However, the high out-of-band leakage in OFDM systems has the tendency to interference with primary users operating in adjacent bands. In order to protect neighboring systems, sidelobe leakage needs to be restricted below the prescribed mask. There are various well-known techniques in the literature for sidelobe suppression...
Optical nanofibres (ONF), which are fabricated by tapering standard optical fibre over a heat source to subwavelength diameter [1], have recently come to the fore as ideal tools for atom-photon hybrid quantum systems. For a recent review on the topic the reader is referred to [2]. A sub-wavelength diameter ONF results in a large portion of the guided mode energy being contained within the evanescent...
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