Catalogue Search | MBRL
Search Results Heading
Explore the vast range of titles available.
MBRLSearchResults
-
DisciplineDiscipline
-
Is Peer ReviewedIs Peer Reviewed
-
Item TypeItem Type
-
SubjectSubject
-
YearFrom:-To:
-
More FiltersMore FiltersSourceLanguage
Done
Filters
Reset
61
result(s) for
"Sharma, Deepesh"
Sort by:
Fuzzy with adaptive membership function and deep learning model for frequency control in PV-based microgrid system
2022
The intricacy to integrate Distributed Generators is the major aspect in power systems, which balanced the power and regulated the voltage and frequency. If varied electrical motors are associated with PV, the rotor speed frequency and the pulse of the PV panel are assorted. Thus, this paper intends to propose Fuzzy with adaptive membership function and Deep learning Controller to control the frequency of rotor speed and the pulse of PV panel simultaneously for developing the power system performance. The main purpose defined in developed approach is to regulate the output waveform, thus minimizing the error amid the control and reference signal. In the proposed Fuzzy controller, the membership function is optimized by “Sorted Position based GWO (SP-GWO)”. The performances of adopted scheme are computed over varied controllers regarding switching time.
Journal Article
Experimental investigation for minimizing circularity and surface roughness under nano graphene mixed dielectric EDM exercising fuzzy-ANFIS approach
2022
The present work aims to study the influence of adding nano graphene powder in dielectric on the circularity and surface roughness of nickel super alloy (Inconel 718) during electrical discharge machining (EDM). The mixing of suitable powder in nano form with dielectric oil enhances the machining efficacy of EDM by altering the electric field intensity and energy distribution. The experimental investigations were performed using Taguchi L
27
orthogonal array by considering peak current (Ip), pulse on time (Ton) and pulse off time (Toff) as input variables. The optimal process conditions have been determined using efficient intelligent methods namely fuzzy logic and ANFIS model giving excellent prediction of machining performance in terms of surface roughness (Ra) and circularity. Based on ANFIS results, the minimum circularity and surface roughness achieved for nano graphene mixed EDM are 0.0126 mm and 1.590 µm respectively, which is 12.27% and 32.91% superior in comparison to traditional EDM results. The ANOVA analysis was performed for confirming adequacy of developed models and based on analysis, peak current was found to have most influencing effect on surface roughness with contribution of 54.96% and pulse on time proved to be the most contributing factor for circularity with contribution of 50.93%. The ANFIS model was found out to be giving more significant predictions than fuzzy model. The scanning electron microscopy shows the improvement in surface finish of nano graphene mixed dielectric EDM in comparison to traditional EDM.
Journal Article
Study of AC conductivity and dielectric relaxation in Bi2O3 modified lithium lead silicate glasses
by
Chauhan, Sumit
,
Sharma, Deepesh
,
Gaur, Sanjay
in
Bismuth trioxide
,
Characterization and Evaluation of Materials
,
Charge transport
2023
In this research work, we have prepared lithium lead silicate glasses with varying concentrations of bismuth by following the melt-quench technique. The prepared samples are investigated by ac conductivity and electric modulus formalisms in the frequency and temperature ranges of 10
–1
–10
7
Hz and 433–533 K, respectively. To check the applicability of various charge transport mechanisms in these prepared samples, the experimental data of ac conductivity was fitted with Jonscher’s power law. It was found to be satisfied in the studied range of temperature and frequency. AC conductivity helps to calculate all the parameters viz.; dc conductivity, activation energy, frequency exponent parameter, and the cross over frequency. The value of ac conductivity increases with Bi
2
O
3
concentration up to 30 mol% due to mobile lithium ions and the network modifier BiO
6
unit. Thereafter, when the ratio of Bi
2
O
3
/Li
2
O becomes greater than unity, the conductivity values decrease due to the blocking effect of the bismuth ions in the network, forming the BiO
3
pyramidal unit. In the current research, the correlated barrier hopping model is found to be suitable for explaining the ac conduction mechanism.
Journal Article
Electrical Conduction and Dielectric Relaxation in Bismuth-Modified Lithium Lead Borate Glasses
2023
Glass compositions of 30Li2O·20PbO·xBi2O3·(50−x)B2O3 (x ranges from 0 mol% to 40 mol%) have been prepared. Conductivity and electric modulus formalism were used to investigate the fabricated glass series in the frequency range between 10−1–107 Hz, and the temperature range between 473–613 K. AC conductivity experimental data were fitted with Jonscher's power law. Electrical characteristics like crossover frequency (ωH), frequency exponent (s), and dc conductivity (σac) were extracted. With the rise in bismuth concentration, the conductivity values first increase and then decrease when the concentration of bismuth exceeded the constant concentration (30 mol%) of lithium content. The decrease in the frequency exponent parameter values with the rise in temperature indicates that all the glass compositions followed the conduction mechanism of correlated barrier hopping.
Journal Article
LFOPI controller: a fractional order PI controller based load frequency control in two area multi-source interconnected power system
2020
PurposeIn computer application scenario, data mining task is rarely utilized in power system, as an enhanced part, this work presented data mining task in power systems, to overcome frequency deviation issues. Load frequency control (LFC) is a primary challenging problem in an interconnected multi-area power system.Design/methodology/approachThis paper adopts lion algorithm (LA) for the LFC of two area multi-source interconnected power systems. The LA calculates the optimal gains of the fractional order PI (FOPI) controller and hence the proposed LA-based FOPI controller (LFOPI) is developed.FindingsFor the performance analysis, the proposed algorithm compared with various algorithm is given as, 80.6% lesser than the FOPI algorithm, 2.5% lesser than the GWO algorithm, 2.5% lesser than the HSA algorithm, 4.7% lesser than the BBO algorithm, 1.6% lesser than PSO algorithm and 80.6% lesser than the GA algorithm.Originality/valueThe LFOPI controller is the proposed controlling method, which is nothing but the FOPI controller that gets the optimal gain using the LA. This method produces better performance in terms of converging behavior, optimization of controller gain, transient profile and steady-state response.
Journal Article
Histopathological study of cutaneous form of Avipoxvirus infection in jungle crow
2012
Aim: A detailed histopathological examination of the samples collected from morbid jungle crow was performed to know the cause of death. Materials and Methods: Gross as well as histopathological examination was conducted. The suspected tissues get processed by formalin fixation and paraffin embedding technique. Result: On gross examination, dry pox lesions were seen on the external body surface whereas no internal lesions were observed. However on histopathological examination, the keratin layer of the epidermis was found to be intact and there was extensive proliferation of subdermal connective tissue infiltrated with polymorph mononuclear (PMN) cells. There was marked ballooning of keratinocytes. Swollen keratinocytes had enlarged pleomorphic and hyper-chromatic nuclei. Several keratinocytes also showed presence of eosinophilic intracytoplasmic inclusions (Bollinger bodies) which was considered confirmatory. Conclusion: Avipoxvirus infection was noticed in a jungle crow. On histopathological study, proliferation of subdermal connective tissue, swollen keratinocytes, pleomorphic and hyper-chromatic nucleus and eosinophilic intracytoplasmic inclusions were noticed. Key words: Avipoxvirus, Histopathology, Jungle crow
Journal Article
Association of Systemic Inflammatory and Anti-inflammatory Responses with Adverse Outcomes in Acute Pancreatitis: Preliminary Results of an Ongoing Study
2017
Introduction
This paper reports preliminary data of an ongoing study that evaluates the association of systemic inflammatory response (SIRS) with early severe acute pancreatitis (ESAP) and compensatory anti-inflammatory response syndrome (characterized by HLA-DR down-regulation) with infected pancreatic necrosis (IPN).
Methods
Consecutive patients presenting within 72 h of symptom onset with organ dysfunction and/or local complications were included. Following parameters were recorded: demographics, etiology, SIRS, APACHE II, creatinine, BUN. Circulating IL-8, IL-6, IL-10, TNF-alpha concentrations and expression of HLA-DR and IL-10 by qRT-PCR in PBMCs were measured. Strength of associations of cytokine concentration and HLA-DR/IL-10 expression with outcomes was expressed as Hedges’ G and relative risk (95% CI).
Results
Twenty-eight patients (10 MSAP; 18 SAP) fulfilled inclusion criteria. Twelve patients had ESAP and eight presented with organ failure. Admission SIRS worsened in eight (28.6%) patients over 48 h. Sixteen (57.1%) patients developed primary IPN. Twenty-one (75%) patients had HLA-DR down-regulation during the first week, which persisted to the second week in 12 (42.9%) patients. IL-8, IL-6, and TNF-α progressively increased from healthy controls to MAP to MSAP to SAP. IL-6 and TNF-α was higher in the patients who developed ESAP (
p
= 0.01 and 0.05, respectively). Patients who died within the first week also had a significantly elevated concentration of IL-6 and TNF-α (
p
= 0.02 and 0.01, respectively). The relative risk (95% CI) of developing primary IPN with persistent HLA-DR down-regulation till the second week of illness was 11.3 (1.6–82.4;
p
= 0.01).
Conclusions
Our study objectively demonstrates significant association of ESAP and early mortality with primary cytokine response, and development of IPN with persistent HLA-DR down-regulation.
Journal Article
Impact of treatment of gastrointestinal nemathelminths on body weight of sheep and goats
by
Sharma, Deepesh
,
Vatsya, Stuti
,
Kumar, Rajeev Ranjan
in
Animals
,
Anthelmintic agents
,
Antiparasitic agents
2016
Gastrointestinal nemathelminths affect productive as well as reproductive performance of a wide range of ruminants. To assess the impact of anthelmintic treatment on gain in body weight (b. wt.) of sheep and goat, a study was conducted using two different flocks of sheep and goats each maintained in semi intensive system. Infected animals in both the flocks were divided into three groups each. Group I and II in each flock were treated with levamisole (@7.5 mg/kg b. wt. subcutaneously) and fenbendazole (@5 mg/kg b. wt. orally), respectively. Animals of group III were kept as untreated control. Individual b. wt. and faecal egg count were recorded up to 42nd day post treatment. Results showed 100 % reduction in faecal egg count of sheep on day 7 after treatment with levamisole and on day 10 after treatment with fenbendazole. In goats, the reduction in faecal egg count was 82.60 % after treatment with levamisole and 78.87 % after treatment with fenbendazole on day 14 post treatment. The study also revealed mean increase of 29.57 and 22.67 % in b. wt. of sheep treated with levamisole and fenbendazole respectively 42nd day post treatment whereas mean b. wt. of infected untreated control groups decreased by 7.14 %. Similarly, there was an increase of 10.71 and 14.47 % in mean b. wt. of goats 42nd day post treatment with levamisole and fenbendazole, respectively whereas mean b. wt. of untreated control group decreased by 15.38 %. More weight gain was recorded in sheep as compare to goats after treatment as compared to the untreated control group, which may be due to some drug resistance in goat and required clarification by further studies in these ecological zones of Udham Singh Nagar.
Journal Article
Prevalence of gastrointestinal helminth infections in rodents of Tarai region of Uttarakhand
2013
The present work was aimed to investigate helminth biodiversity among rodents in order to evaluate the threat for helminth transmission to humans since they act as a potential source of parasitic zoonoses. In this study, faeces of 43 black rats (Rattus rattus) and 35 house mice (Mus musculus) were collected from various habitats viz. domestic places and agricultural fields of different parts of tarai region of Uttarakhand. These faecal samples were examined for the presence of parasitic eggs, adult and segments of the worms. The study revealed that the rodents were infected with 5 genera of helminth parasites, i.e. Hymenolepis nana, Hymenolepis diminuta, Syphacia muris, Capillaria hepatica, Trichuris muris and other strongyle eggs (2 species of cestodes and 4 species of nematodes). Adult Syphacia muris and segments of Hymenolepis nana were also recovered from faecal droppings. Of the 43 samples of black rat, all (100 %) and of the 35 samples of mice 9 (25.71 %) were found positive for one or more than one species of parasitic infections. Greater infection of H. diminuta 19 (44.18 %) followed by H. nana 17 (39.53 %) was seen in rat whereas mice were mostly infected with H. nana. The diversity and prevalence of various parasites reported here within domestic habitats may suggest that these can pose a high risk of helminth transmission to human population and are thus of considerable public health importance.
Journal Article