http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Bhagat Kalsoom,Ye Shengyong,Dai Chaohua,Lian Jingru,Bhayo M. Zubair 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.6
Pakistan has been facing an energy crisis for many years. Techno-economic analysis of wind power generation is carried out to meet energy demand. Wind data from 2016 to 2018 has been selected for a coastal site of Sindh, Pakistan. For this purpose, four distribution functions, namely Weibull, Gamma, Rayleigh, and Lognormal are used. These distribution functions are compared using the coeffi cient of determination (R 2 ) and root mean square error tests. Wind potential on a daily, monthly, yearly and seasonal basis is evaluated. In this regard, various turbine models are selected to estimate their power generation capacity. The assessment results for a hub height of 100 m shows the average wind speed for three years is 7.9 m/s with direction dominated between the West and Southwest. The most probable wind speed is 9.5 m/s having a maximum energy density of 455 kWh/m 2 in May. The maximum mean wind speed of 8.55 m/s is in the spring. The Weibull distribution function (k = 2.92 & C = 8.86 m/s) performs the best. The maximum capacity factor for Fuhrlander LLC WTU 3.0–120 is 55.49% and for Siemens SWT-3.15–142 is 55.22%. Likewise, the estimated lowest LCOE ($/1kWh) for Fuhrlander LLC WTU 3.0–120 and Siemens SWT-3.15–142 is $0.04016 and $0.04035 respectively. Thus, this site contains suitable technical and economic characteristics of the wind power plant.
Bhagat Shubham,Prasad P. Rama Chandra 대한공간정보학회 2024 Spatial Information Research Vol.32 No.3
The global impact of coal mining and associated activities on land use/land cover (LULC) changes is significant. This study used Landsat satellite images from 1990 to 2020 to assess LULC changes and their impact on land surface temperature (LST) in four districts of Chhattisgarh state, India. Over three decades, Korba and Raigarh districts saw expansion in coal mines, built-up areas, and water bodies, while forest areas diminished by 711.3 km2 and 212.87 km2, respectively. Koriya district saw coal mine expansion of 5.68 km2 (1990–2010), later declining to 2.85 km2, alongside growth in built-up regions, and forest cover reduction by 251.31 km2 in 2020. Surguja district experienced coal mine and built-up area expansion (1990–2020), with initial forest decline of 160.21 km2 in 2010 followed by recovery in 2020. LST was determined using the Mono-window algorithm. LST increased during winter and summer, with the most significant rise in summer. Vegetation-rich regions had lower LST, while coal mines had the highest temperatures. There was a positive relationship between mining land patch size and patch temperatures. This study underscores the need for vegetation restoration in mining areas, particularly abandoned sites, and sustainable mining practices to mitigate coal mining's warming effects.
Bhagat, M.S.,Shinde, K.N.,Singh, N.,Pathak, M.S.,Singh, Pramod K.,Pawar, S.U.,Singh, Vijay Elsevier 2018 Optik Vol.161 No.-
<P><B>Abstract</B></P> <P>The photoemission properties of a microcrystalline-powder Tb<SUP>3+</SUP>-doped CaY<SUB>2</SUB>Al<SUB>4</SUB>SiO<SUB>12</SUB> garnet phosphor were studied. The microcrystalline materials were obtained using the sol–gel method that yields chemically homogeneous and microparticle-sized powders. X-ray powder diffraction (XRPD) and scanning electron microscope (SEM) analyses were used to reveal the crystallinity, crystal structure, and surface morphology of the prepared CaY<SUB>2</SUB>Al<SUB>4</SUB>SiO<SUB>12</SUB>:Tb<SUP>3+</SUP> garnet phosphor. The samples showed a green-emission characteristic at around 544 nm with an excitation at 271 nm. A concentration quenching was observed with the increasing of the Tb<SUP>3+</SUP> concentration. The effect of the Tb<SUP>3+</SUP> doping and the photoluminescence properties were also investigated, leading to the proposal of a feasible interpretation by the authors.</P>
Ajeet Bhagat Singh,Chad A. Bousman,Chee Hong Ng,Keith Byron,MIchael Berk 대한정신약물학회 2015 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.13 No.1
Objective: Previous studies suggest child abuse and serotonergic polymorphism influence depression susceptibility and antidepressant efficacy. Polymorphisms of the norepinephrine transporter (NET) may also be involved. Research in the area is possibly clouded by under reporting of abuse in researcher trials. Methods: Adults (n=51) with major depressive disorder has 8 weeks treatment with escitalopram or venlafaxine. Abuse history was obtained, the ongoing emotional impact of which was measured with the 15-item impact of event scale (IES-15). The 17-item Hamilton Depression Rating Scale (HDRS) was applied serially. Two NET polymorphisms (rs2242446 and rs5569) were assayed, blinded to HDRS ratings and abuse history. Results: No subjects reporting abuse with high impact in adulthood (IES-15 ≥26, n=12) remitted; whereas 77% reporting low impact (IES-15 <26; n=26) remitted (p<0.001). Subjects reporting high impact abuse (n=12) had a 50-fold (95% confidence interval=4.85-514.6) greater odds of carrying rs2242446-TT genotype, but the small sample size leaves this finding vulnerable to type I error. Conclusion: The level of persisting impact of child abuse appears relevant to antidepressant efficacy, with susceptibility to such possibly being influence by NET rs2242446 polymorphism. Larger studies may be merited to expand on this pilot level finding given potential for biomarker utility.
Bacterial Exopolysaccharides: Insight into Their Role in Plant Abiotic Stress Tolerance
( Neeta Bhagat ),( Meenu Raghav ),( Sonali Dubey ),( Namita Bedi ) 한국미생물 · 생명공학회 2021 Journal of microbiology and biotechnology Vol.31 No.8
Various abiotic stressors like drought, salinity, temperature, and heavy metals are major environmental stresses that affect agricultural productivity and crop yields all over the world. Continuous changes in climatic conditions put selective pressure on the microbial ecosystem to produce exopolysaccharides. Apart from soil aggregation, exopolysaccharide (EPS) production also helps in increasing water permeability, nutrient uptake by roots, soil stability, soil fertility, plant biomass, chlorophyll content, root and shoot length, and surface area of leaves while also helping maintain metabolic and physiological activities during drought stress. EPS-producing microbes can impart salt tolerance to plants by binding to sodium ions in the soil and preventing these ions from reaching the stem, thereby decreasing sodium absorption from the soil and increasing nutrient uptake by the roots. Biofilm formation in high-salinity soils increases cell viability, enhances soil fertility, and promotes plant growth and development. The third environmental stressor is presence of heavy metals in the soil due to improper industrial waste disposal practices that are toxic for plants. EPS production by soil bacteria can result in the biomineralization of metal ions, thereby imparting metal stress tolerance to plants. Finally, high temperatures can also affect agricultural productivity by decreasing plant metabolism, seedling growth, and seed germination. The present review discusses the role of exopolysaccharide-producing plant growth-promoting bacteria in modulating plant growth and development in plants and alleviating extreme abiotic stress condition. The review suggests exploring the potential of EPS-producing bacteria for multiple abiotic stress management strategies.
Performance Evaluation of Channel Estimation Techniques in OFDM based Mobile Wireless System
Kussum Bhagat,Jyoteesh Malhotra 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.3
In this modern wireless technology Multicarrier communication is one of the more suitable and reliable communication technique. Orthogonal Frequency Division Multiplexing (OFDM) is used as modulation technique in multicarrier communication. The present paper gives an overview of OFDM and the various Channel Estimation techniques used in OFDM. The results implemented in MATLAB gives the performance of LS and the MMSE channel estimators for an OFDM system based on the parameters of BER and MSE. Paper also describes the Delayed feedback MIMO OFDM channel estimation performance of LS and LMMSE and DFT based channel estimation technique for LS-linear and MMSE estimator. BPSK and 16-QAM modulation techniques are used.
Simulative Investigations for Robust Frequency Estimation Technique in OFDM System
Kussum Bhagat,Jyoteesh Malhotra 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.4
OFDM (Orthogonal Frequency Division Multiplexing) is a promising technique for 4G and 3GPP LTE system in terms of providing the higher data rate and efficient use of bandwidth. But OFDM suffers from ISI and ICI interferences in wireless and fading environment. There is a loss of certain amount of data because of these interferences, thus synchronization is required. It is important to estimate and correct the start of OFDM symbol efficiently to reduce timing and frequency offset errors. The paper mainly focus on the CFO problem present in OFDM system, describes the effect of CFO in OFDM system and provides the estimation techniques for CFO in time domain and frequency domain. The simulation results are performed for the CFO estimation technique with different values of CFO and then results has been compared.
Electro-Optical Properties of One Pot Synthesized Polyindole in the Presence of Poly(vinyl acetate)
D. J. Bhagat,G. R. Dhokane 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.3
Polyindole was prepared in the presence of poly(vinyl acetate) through a chemical polymerization technique. The indole monomer was polymerized using ferric chloride as an oxidant. Electrical conductivity measurements were performed through a two probe technique. The prepared composites were analyzed by x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field-emission scanning electron microscopy (FE-SEM), energy dispersive x-ray spectroscopy (EDAX), and ultraviolet-visible (UV-VIS) spectroscopy. The DC conductivity was found to be 4.46 × 10−6 S/cm at 383 K. An attempt has been made to investigate the electrooptical properties of PIN/PVAc composite films.