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Congestion Management Using Multi-Objective Glowworm Swarm Optimization Algorithm
Surender Reddy Salkuti,김성철 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.4
This paper proposes a novel congestion management (CM) approach within an optimal power fl ow (OPF) framework in the context of restructured power markets. The conventional OPF problem is modifi ed to include a mechanism which enables the market players to compete and trade, and simultaneously ensuring the secured system operation. In this paper, both the centralized and bilateral dispatch strategies of system operator are considered. The proposed CM problem is formulated by considering the two objective functions. If the bidding prices in the market are not considered, then the fi rst objective is to minimize to the total cost of generation. By considering the bidding prices in the market, the fi rst objective function becomes the minimization of congestion rental in the system. The second objective function is to minimize the total transmission losses in the system. The proposed multi-objective based CM problem has been solved using the multi-objective glowworm swarm optimization (MO-GSO) algorithm. The standard IEEE 30 bus and IEEE 118 bus test systems are used to test the proposed CM approach. The results show the suitability of proposed MO-GSO algorithm for solving the multi-objective based CM problem and to generate a well distributed Pareto optimal set of considered two objective functions.
EFFECTS OF ANNEALING ON THE SURFACE DEFECTS OF ZINC OXIDE NANOPARTICLES
SURENDER KUMAR,P. D. SAHARE 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2012 NANO Vol.7 No.3
ZnO nanoparticles have been prepared by wet chemical method. The properties of the synthesized nanostructures are studied using X-ray di®raction, Transmission Electron Microscopy (TEM), Photoluminescence (PL), Ultraviolet-Visible absorption, Laser Raman and Fourier transform Infrared (FTIR) spectroscopy. The thermal decomposition is analyzed by Thermogravimetric (TG) and Di®erential Thermal Analysis (DTA). The in°uence of annealing on structural and optical properties of ZnO nanoparticles has been systematically investigated. The PL results demonstrated that the visible emission at 565 nm is associated with the combination of oxygen vacancies and OH group attached at the surface of ZnO nanoparticles. OH group is lessened from the surface of ZnO nanoparticles with annealing temperature and a blue-shift in visible emission peak is observed at 800?C annealing temperature.
PHOTOCATALYTIC ACTIVITY OF BISMUTH VANADATE FOR THE DEGRADATION OF ORGANIC COMPOUNDS
SURENDER KUMAR,P. D. SAHARE 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.1
We synthesized the nanoparticles of Bi4V2O11 with particle size less than 30 nm by combustion method and they were found to be in monoclinic phase (i.e., α-phase), confirmed by X-ray diffraction, Raman and Fourier transform Infrared spectroscopy. Morphology of the α-Bi4V2O11 was analyzed by transmission electron microscopy and scanning electron microscopy techniques. Photocatalytic activity of α-Bi4V2O11 in degradation of common organic dyes, such as, Rhodamine B (Rh B) and Methylene Blue (MB) was investigated under UV irradiation. Furthermore, γ-Bi4V2O11 was obtained by post annealing treatment of α-Bi4V2O11 to investigate the phase transition and size dependent effects on photocatalytic activity. α-Bi4V2O11 has shown better photocatalytic activity compared to γ-Bi4V2O11 which is attributed to its smaller particle size enhancing its surface to volume ratio and being in a different phase. BET measurement is also performed in order to observe the effect of surface area on photocatalytic activity. Complete removal of aqueous Rh B dye was realized after UV light irradiation for 45 min with α-Bi4V2O11 as the photocatalyst.
Communication Development Support to the Children with Diability through Dousa-hou
Surender Kumar 서울행정학회 2014 서울행정학회 학술대회 발표논문집 Vol.2014 No.7
The results of Questionnaire for Development Changes showed that the psychological rehabilitation method Dousa-hou could support and promote most the body posture and communication related factors as voluteer body movements, behavior control, health maintenance, emotion expression, initiative & appearance, speech and communication, and social interaction factors by the practice of Dousa-hou training in 3-days long camps in Malaysian context.
( Surender Singh ),( Palanisami Thavamani ),( Mallavarapu Megharaj ),( Ravi Naidu ) 한국동물자원과학회(구 한국축산학회) 2015 한국축산학회지 Vol.57 No.23
Cellulose degrading bacteria from koala faeces were isolated using caboxymethylcellulose-Congo red agar, screened in vitro for different hydrolytic enzyme activities and phylogenetically characterized using molecular tools. Bacillus sp. and Pseudomonas sp. were the most prominent bacteria from koala faeces. The isolates demonstrated good xylanase, amylase, lipase, protease, tannase and lignin peroxidase activities apart from endoglucanase activity. Furthermore many isolates grew in the presence of phenanthrene, indicating their probable application for bioremediation. Potential isolates can be exploited further for industrial enzyme production or in bioremediation of contaminated sites.
Design and Modeling of a Capacitor Bank Power Supply for Fast Charging
Surender Kumar Sharma,Pankaj Deb,R. Shukla,P. Banerjee,T. Prabaharan,R. Das,B. Das,B. Adhikary,A. Shyam 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.61
Power supplies used in pulsed power applications are rugged, and the capacitor bank charges rapidly. The capacitor bank is fully charged to the rated voltage in a minimum time so as to reduce the dielectric stress on the capacitors and to increase their life. When the capacitor bank is discharged in the load much Electromagnetic Interference (EMI) and Electromagnetic Pulse (EMP) due to high currents discharges is generated, which can damage the electronic circuitry in the power supply if proper shielding & isolation are not provided to it. We have designed and fabricated a compact, rugged and low-cost high voltage (HV) power supply for a 114-kJ, 40-kV capacitor bank. The power supply consists of a high voltage transformer (5.25 kVA, 230 V/35 kV, 50 Hz), a high voltage diode (Semikron Make PIV 110 kV, 150 mA) and a charging resistor placed in a tank filled with oil. The charging resistors value is selected after a PSPICE simulation of the charging circuit for different values of the charging resistor. The charging current is limited with the selected resistor so that it does not exceed the current limit of the HV transformer & diode. The input voltage to the high voltage transformer is given through autotransformer, which rotates from 0 ?230 volts in 40 sec with a single-phase synchronous motor. The capacitor bank is charged to 40 kV in a minute after that, the power supply is decoupled from the capacitor bank by using a pneumatic decoupling switch, then the capacitor bank's switch is triggered to deliver the capacitor bank's energy to the load. Control and protection in the power supply is provided for its safe operation. The monitoring of charging voltage is done with a digital display meter with fiber optic isolation by using a V-F and then F-V converter in order to provide electrical isolation.
Optimal Operation of Electrified Railways with Renewable Sources and Storage
Surender Reddy Salkuti 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.1
This paper proposes an approach for the optimal operation of electrifi ed railways by balancing energy fl ows among energy exchange with the traditional electrical grid, energy consumption by accelerating trains, energy production from decelerating trains, energy from renewable energy resources (RERs) such as wind and solar photovoltaic (PV) energy systems, and energy storage systems. The objective function considered in this work is the minimization of total operating cost of electrifi ed railway system consisting of cost of power generation from the external power system, cost of power obtained from RERs such as wind and solar PV sources, cost of power from storage systems such as battery storage and supercapacitors, and the income obtained by selling excess power back to the main electrical grid. This problem is formulated as an AC optimal power fl ow problem subjected to various equality and inequality constraints. In this work, the probability distribution functions (PDFs) are used to the uncertainties related to wind and solar PV powers. The proposed optimization problem is solved by using CONOPT solver of generalized algebraic modeling system (GAMS) software, which is a powerful and effi cient optimization tool. The simulation results obtained with GAMS/CONOPT solver are also compared with meta-heuristic based diff erential evolution algorithm (DEA).
Mechanical behavior of concrete comprising successively recycled concrete aggregates
Verma, Surender K.,Ashish, Deepankar K. Techno-Press 2017 Advances in concrete construction Vol.5 No.4
The concrete industry of developing countries like India consumes majority of natural resources. The increase in population has necessitated the construction of more and more structures. Further many structures have completed their life span or have undergone damages thus warranting the demolition of these structures. India produces approximately 23.75 million tons of recycled concrete aggregate (RCA) annually. The natural resources are depleting at a higher rate with the increasing demand of concrete industry. This difficulty can be reduced with the use of RCA in land fill and concrete manufacturing. Use of RCA can provide cost savings and better energy utilization. This paper presents mechanical behavior of concrete comprising successively recycled concrete aggregate. Mechanical properties of recycled concrete get affected with number of recycling. In mix design successive recycled concrete aggregate (SRCA) was used in place of natural aggregates (NA) with 100% replacement. The test results of the compressive, flexural strength and pulse velocity were obtained for 14 and 28 days of curing age which showed significant improvement in results.