Literature survey on low rank approximation of matrices

Low rank approximation of matrices has been well studied in literature. Singular value decomposition, QR decomposition with column pivoting, rank revealing QR factorization (RRQR), Interpolative decomposition etc are classical deterministic algorithms for low rank approximation. But these techniques are very expensive $(O(n^{3})$ operations are required for $n\times n$ matrices). There are several randomized algorithms available in the literature which are not so expensive as the classical techniques (but the complexity is not linear in n). So, it is very expensive to construct the low rank approximation of a matrix if the dimension of the matrix is very large. There are alternative techniques like Cross/Skeleton approximation which gives the low-rank approximation with linear complexity in n . In this article we review low rank approximation techniques briefly and give extensive references of many techniques

A Scale to Measure the Attitude of farmers towards Kisan Call Centre

Kisan call centre is one of the active services provided by the Government of India exploiting the area of ICT to support the farmers in their day to day farming activities. Since the service is free of cost and can be accessed from any part of the state from 6 AM to 10 PM, it is assumed to be utilized by majority of the farmers in India. Hence the present study was undertaken to develop a scale that would help to measure the attitude of farmers towards Kisan call centre.  Thirty statements expressing the attitude of farmers towards KCC to be included in the scale reflecting both favourable and unfavourable attitude towards KCC was collected through review of literature and discussion with experts in the field of extension and was carefully edited using the criteria suggested by Edwards (1957). S-value and Q- value for the statements were found and that statement whose S-value was spread throughout the continuum and had small Q- value was selected. Finally twenty three statements were selected to form Thurston and Chaves (1928) equal appearing scale to measure the attitude of farmers on KCC. The reliability and validity of the scale was also found in order to ensure the scales usability.

Speech Enhancement using Kernel and Normalized Kernel Affine Projection Algorithm

The goal of this paper is to investigate the speech signal enhancement using Kernel Affine Projection Algorithm (KAPA) and Normalized KAPA. The removal of background noise is very important in many applications like speech recognition, telephone conversations, hearing aids, forensic, etc. Kernel adaptive filters shown good performance for removal of noise. If the evaluation of background noise is more slowly than the speech, i.e., noise signal is more stationary than the speech, we can easily estimate the noise during the pauses in speech. Otherwise it is more difficult to estimate the noise which results in degradation of speech. In order to improve the quality and intelligibility of speech, unlike time and frequency domains, we can process the signal in new domain like Reproducing Kernel Hilbert Space (RKHS) for high dimensional to yield more powerful nonlinear extensions. For experiments, we have used the database of noisy speech corpus (NOIZEUS). From the results, we observed the removal noise in RKHS has great performance in signal to noise ratio values in comparison with conventional adaptive filters

Measuring Environmental Efficiency of Industry: A Case Study of Thermal Power Generation in India

Technical and environmental efficiency of some coal-fired thermal power plants in India is estimated using a methodology that accounts for firm’s efforts to increase the production of good output and reduce pollution with the given resources and technology. The methodology used is directional output distance function. Estimates of firm-specific shadow prices of pollutants (bad outputs), and elasticity of substitution between good and bad outputs are also obtained. The technical and environmental inefficiency of a representative firm is estimated as 0.10 implying that the thermal power generating industry in Andhra Pradesh state of India could increase production of electricity by 10 per cent while decreasing generation of pollution by 10 percent. This result shows that there are incentives or win-win opportunities for the firms to voluntarily comply with the environmental regulation. It is found that there is a significant variation in marginal cost of pollution abatement or shadow prices of bad outputs across the firms and an increasing marginal cost of pollution abatement with respect to pollution reduction by the firms. The variation in marginal cost of pollution abatement and compliance to regulation across firms could be reduced by having economic instruments like emission tax.environmental and technical efficiency; shadow prices of bad outputs; air pollution

Vizualizace provozních hodnot elektromobilu

The car's dashboard has become an important part of every car over the last century. In the contemporary world, political, environmental, energetic and social conditions electric vehicles will play an immportant role in the future of transportation. The latest information technology enables the use of mobile technology to communicate with the electric car. Communication bus connection and in-vehicle wireless communication play an important role. The user and driver of the electric vehicle need to have an overview of the vehicle's operating parameters but also the traction system parameters at the time of charging and parking. The diploma thesis deals with the display of operational and other parameters in the electric car, the possibility of using mobile devices. It proposes solutions for communication links in an electric car. It informs about experimental design for displaying operating variables using CAN bus and BT wireless connection. Solutions are summarized and the vision of a small electric car solution for suburban traffic is outlined.Přístrojová deska automobilu se v rpůběhu minulého století stala důležitou součástí každého doravního prostředku. V současných světových politických, environmentálních, energetických a sociálních podmínkách budou hrát elektrická vozidla významnou roli. Nejnovější informační technologie umožňují využití mobilních technologií pro komunikaci s elektromobilem. Významné je napojení komunikačních sběrnice a bezdrátová komunikace ve vozidle. Uživatel a řidič elektrického vozidla musí mít přehled o provozních parametrech vozidla, ale také o parametrech jeho trakčního systému v době nabíjení a parkování. Diplomová práce se zabývá zobrazením provozních a dalších parametrů v elektromobilu, možností využití mobilních zařízení. Navrhuje řešení komunikačních propojení v elektromobilu. Informuje o experimentálních zapojeních pro zobrazení provozních veličin pomocí sběrnice CAN a bezdrátového spojení BT. Jsou shrnuta řešení a nastíněna vize řešení pro malé elektromobily pro příměstský provoz.450 - Katedra kybernetiky a biomedicínského inženýrstvídobř

A preliminary comparison of Na lidar and meteor radar zonal winds during geomagnetic quiet and disturbed conditions

We investigate the possibility that sufficiently large electric fields and/or ionization during geomagnetic disturbed conditions may invalidate the assumptions applied in the retrieval of neutral horizontal winds from meteor and/or lidar measurements. As per our knowledge, the possible errors in the wind estimation have never been reported. In the present case study, we have been using co-located meteor radar and sodium resonance lidar zonal wind measurements over Andenes (69.27$^{\circ}$N, 16.04$^{\circ}$E) during intense substorms in the declining phase of the January 2005 solar proton event (21-22 January 2005). In total, 14 h of measurements are available for the comparison, which covers both quiet and disturbed conditions. For comparison, the lidar zonal wind measurements are averaged over the same time and altitude as the meteor radar wind measurements. High cross correlations ($\sim$0.8) are found in all height regions. The discrepancies can be explained in light of differences in the observational volumes of the two instruments. Further, we extended the comparison to address the electric field and/or ionization impact on the neutral wind estimation. For the periods of low ionization, the neutral winds estimated with both instruments are quite consistent with each other. During periods of elevated ionization, comparatively large differences are noticed at the highermost altitude, which might be due to the electric field and/or ionization impact on the wind estimation. At present, one event is not sufficient to make any firm conclusion. Further study with more co-located measurements are needed to test the statistical significance of the result

Carbonization of Non-Coking Coal

Since coking coal reserves all over the world is not sufficient to meet the demand of fuel used in iron making,DRI route of iron making is being adopted.Taking into account the current scenrio ,India produces around 20 MT per annum in which non-coking coal is used extensively.In this project work,studies on effect of different carbonisation temperatures(400,600,800,1000),chemical and physical properties(Proximate analysis,caking characteristics,porosity) of different coal samples,obtained from different mines in India were conducted for their effective use in sponge iron making.In the project work studies has been done on chars prepared from Jagannath,Lingaraj Mines,Ananta mines,Bhubaneswari and Talcher open field mines. Non-coking coals at four different Carbonisation temperatures were analysed for detremination of their physical and chemical properties.It was concluded that increase in carbonisation temperature,volatile matter and calorific value decreases where as fixed carbon content and ash content increases.It was also found out that Bhubaneswari mines coal has high fixed carbon content. Talcher mines coal has highest calorific value.This test examines which coal is best applicable for industrial applications like sponge iron making.Studies on different soaking rate as well as different soaking time was also investigated