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Academic literature on the topic 'Two and three-shift operation'
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Journal articles on the topic "Two and three-shift operation"
1
Huang, Yu Ping, Yue Zhong, Zai Ping Zheng, Ying Xu, and Hong Xing Wu. "Analysis of Two-Phase Operation Mechanism of Three-Phase Motor Based on Capacitor Phase Shift Method." Applied Mechanics and Materials 556-562 (May 2014): 2058–62. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2058.
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In the absence of a three-phase power source, single-phase operation of three-phase induction motor used single-phase power source had a certain practical significance. In this paper, utilized symmetrical component method analysed the asymmetric circuit system of motor, will be voltage and current of the three-phase stator windings decomposed into positive, negative and zero sequence three groups symmetrical components. The theory is analyzed and the formula is deduced of capacitor phase shift method, solved the problem of starting torque, proposed to add starting capacitors and deduced the optimal value of starting capacitor. Finally, the single-phase operation of three-phase induction motor is simulated and verified by simulation software.
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Li, Xinwang, Li Li, Huayong Lv, and Tianqiang Guan. "The shift step optimization of belt conveyor in self-advancing semi-continuous mining technology based on SIMIO." World Journal of Engineering 14, no. 4 (2017): 324–28. http://dx.doi.org/10.1108/wje-10-2016-0116.
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Purpose This paper aims to develop a computer simulation processing method to simulate the mining operation of self-advancing semi-continuous mining technology and optimize the shift step of belt conveyor by using simulation modeling framework based on intelligent objects (SIMIO). The method would effectively solve the challenge of field testing such large-scale equipment. Design/methodology/approach The four operational modes of self-advancing semi-continuous mining technology at single bench had been illustrated. The operational system of this technology was analyzed and broken down to single units. By analyzing the time constitution of one operation cycle, the theoretical optimization model of shift step can be established and the optimization criteria is the time utilization ratio being maximum. Once the simulation flow was determined, a three-dimensional (3D) computer simulation model of this mining technology was developed by adapting the SIMIO simulating software to the theoretical model. The models were run to investigate the outputs from different operational modes using geological and mining data from East open-pit mine. Findings The result of these simulations showed that the four-mining-width one-shift (FMWOS) is at maximum production capacity during all operation modes. If transfer equipment is necessary, then this mode can adapt, but system will become more complex. There are minor differences between two-mining-width one-shift and three-mining-width one-shift. If transfer equipment is not necessary, then the two-mining-width one-shift can adapt during actual production. Originality/value The simulation results show that the proposed method can achieve the optimal shift step of a belt conveyor and effectively reduce the time loss caused by the coordination of multiple pieces of equipment while simultaneously improving operational efficiency.
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Odden, David. "Tone shift and spread in Taita I." Studies in African Linguistics 30, no. 1 (2001): 76–99. http://dx.doi.org/10.32473/sal.v30i1.107363.
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Numerous Bantu languages have processes of rightward shift or spread of H tone. Sometimes the process is quite simple: every H shifts once to the right (as in Cijita) or spreads once to the right (as in Kikerewe). The tonal system of Taita is more complex in that both shifting and spreading are found in the language. Furthermore, the extent of tone shift or spread is not just one syllable; sometimes, H tone can shift or spread by two syllables. An analysis of the tonal system of the Dembwa dialect of Taita is given here. It is argued that the facts of the language are best described in terms of two rules of rightward spreading and a third rule of tone delinking. The argument for analyzing the tone system in terms of three interacting rules rather than one unified rightward movement process resides in the fact that the environments for the three processes only overlap partially. On the theoretical front, these results support a general decomposition of the process of tone shift into tone spread interacting with tonal delinking, rather than including the operation of shift in the formal repertoire of primitive phonological operations.
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Lin, Bor-Ren. "Phase-Shift PWM Converter with Wide Voltage Operation Capability." Electronics 9, no. 1 (2019): 47. http://dx.doi.org/10.3390/electronics9010047.
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A soft switching three-level pulse-width modulation (PWM) converter is presented for industrial electronics with wide voltage range operation, such as solar power or fuel cell applications. Phase shift PWM scheme is used on the input-side to accomplish the zero voltage turn-on on power switches and improve the converter efficiency. Three-level diode-clamp circuit topology is adopted in the presented circuit to lessen the voltage ratings on active devices for high voltage applications. Three sub-circuits with the different turns-ratio of transformers can be selected in the presented converter in order to achieve 10:1 (Vin,max = 10Vin,min) wide input voltage operation when compared to the conventional multilevel converter. The proposed circuit is a single-stage converter instead of two-stage converter to realize wide voltage operation. Therefore, the presented converter has less component counts. Finally, the design procedure and experiments with a 300W laboratory circuit are presented and discussed to confirm the circuit analysis and converter performance.
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Pearson, Michael. "Issues associated with two-shift operation of combined cycle generating plant." Materials at High Temperatures 18, no. 4 (2001): 211–14. http://dx.doi.org/10.1179/mht.2001.022.
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Takahashi, Daiko. "Determiner Raising and Scope Shift." Linguistic Inquiry 33, no. 4 (2002): 575–615. http://dx.doi.org/10.1162/002438902762731772.
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Whether quantifier scope is regulated by movement or not has been debated for more than two decades, and this issue has become especially important in the minimalist framework. This article provides a novel argument for the existence of a scope-marking movement operation on the basis of what can be called the split-QP construction in Japanese. It is shown that the construction involves overt movement of quantificational determiners, whereby their scope is visibly marked, and that the movement operation is subject to economy so that it may apply only if it yields scope shift.
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Wu, Caicong, Zhibo Chen, Dongxu Wang, et al. "A Cloud-Based In-Field Fleet Coordination System for Multiple Operations." Energies 13, no. 4 (2020): 775. http://dx.doi.org/10.3390/en13040775.
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In large-scale arable farming, multiple sequential operations involving multiple machines must be carried out simultaneously due to restrictions of short time windows. However, the coordination and planning of multiple sequential operations is a nontrivial task for farmers, since each operation may have its own set of operational features, e.g., operating width and turning radius. Taking the two sequential operations—hoeing cultivation and seeding—as an example, the seeder has double the width of the hoeing cultivator, and the seeder must remain idle while waiting for the hoeing cultivator to finish two rows before it can commence its seeding operation. A flow-shop working mode can coordinate multiple machines in multiple operations within a field when different operations have different implement widths. To this end, an auto-steering-based collaborative operating system for fleet management (FMCOS) was developed to realize an in-field flow-shop working mode, which is often adopted by the scaled agricultural machinery cooperatives. This paper proposes the structure and composition of the FMCOS, the method of operating strip segmenting, and a new algorithm for strip state updating between successive field operations under an optimal strategy for waiting time conditioning between sequential operations. A simulation model was developed to verify the state-updating algorithm. Then, the prototype system of FMCOS was combined with auto-steering systems on tractors, and the collaborative operating system for the server was integrated. Three field experiments of one operation, two operations, and three operations were carried out to verify the functionality and performance of FMCOS. The results of the experiment showed that the FMCOS could coordinate in-field fleet operations while improving both the job quality and the efficiency of fleet management by adopting the flow-shop working mode.
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Lin, Bor-Ren, and Ji-Wei Chang. "Analysis and Verification of a Wide Input Voltage PWM Converter with Variable Windings." Energies 13, no. 7 (2020): 1634. http://dx.doi.org/10.3390/en13071634.
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A three-leg pulse-width modulation converter with auxiliary windings is provided and investigated to realize wide voltage operation and zero voltage switching characteristics on power switches. The presented converter has three converter legs on the input-side and two sets of winding turns on the output-side. Owing to the on/off states of the three converter legs and the two sets of secondary winding turns, the proposed converter can be operated under three different equivalent circuits to have wide input voltage operation from 30V ~ 240V (Vin,max = 8Vin,min). Compared with the multi-stage converters to realize wide input voltage operation, the proposed circuit topology has fewer circuit components and a simple control algorithm. Conventional duty cycle control with phase-shift between each converter leg is adopted to regulate load voltage and also accomplish zero voltage switching on active switches. The presented three-leg converter is tested with a laboratory circuit. Finally, experiments testify to the performance and validity of the presented converter.
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Rząsa, Mariusz, Ewelina Łukasiewicz, and Dariusz Wójtowicz. "Test of a New Low-Speed Compressed Air Engine for Energy Recovery." Energies 14, no. 4 (2021): 1179. http://dx.doi.org/10.3390/en14041179.
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The paper presents a new design solution for the multi-cylinder compressed air engine, described in the PL 216801 patent. A characteristic feature of the engine is its double-piston operation with pistons working in pairs in opposition and a reciprocating movement in toroidal cylinders. The energy of compressed air was used more effectively in the described engine than in the solutions known so far. Comparing the engine built in accordance with the PL 216801 patent with the parameters of the MP165 and MP3000 engines, lower air consumption in relation to the power generated on the shaft is demonstrated. The described engine uses only one crankshaft and one straight complex shaft, which constitutes an innovative combination of pistons, while maintaining the same engine operation as in the case of two crankshafts operating with phase shift and working chamber shift. Such a solution results in a reduction in the harmful space occurring at the beginning of the power stroke to the value close to “zero”—the necessity to maintain the minimum distance between the pistons working in one cylinder when they are at their closest exists only to for the sake of collision-free operation—which is very desirable for the compressed engine operating with a shift of the working chamber. The mechanical efficiency of the engine has also been improved by guiding the pistons on the complex shaft, and the number of kinematic nodes was decreased by applying only three connecting rods supporting six pistons, which also makes it possible to improve the power and mass relation by approximately 25% in comparison with the currently known engines of similar power.
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LIU, DAOCHU, YIMIN LIU, XIAOFENG YIN, XIANSONG LIU, and ZHANJUN ZHANG. "GENERALIZED THREE-PARTY QUBIT OPERATION SHARING." International Journal of Quantum Information 11, no. 01 (2013): 1350011. http://dx.doi.org/10.1142/s0219749913500111.
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Two three-party schemes of qubit operation sharing proposed by Zhang and Cheung [J. Phys. B44 (2011) 165508] are generalized by utilizing partially entangled states as quantum channels instead of maximally entangled ones. Their quantum and classical resource consumptions, necessary-operation complexities, success probabilities and efficiencies are calculated and compared with each other. Moreover, it is revealed that the success probabilities are completely determined by the shared entanglement.