Results 11 to 20 of about 4,550,410 (148)
State work and the testing concours of citizenship. [PDF]
Br J Sociol, 2020 Abstract Anyone trying to be a citizen has to pass through a set of practices trying to be a state. This paper investigates some of the ways testing practices calibrate citizens, and in doing so, perform “the state.” The paper focuses on three forms of citizenship testing, which it considers exemplary forms of “state work,” and which all, in various ...
Schinkel W.
europepmc +2 more sources
Metabolomic evolution of the postpartum dairy cow uterus
Molecular Reproduction and Development, Volume 90, Issue 12, Page 835-848, December 2023., 2023 In the uteri of dairy cows, a molecular signature of metabolic changes marks physiological recovery from early to mid‐postpartum, influencing the reproductive outcome at next insemination. Abstract High rates of early pregnancy loss are a critical issue in dairy herds, particularly in seasonal, grazing systems.
Nicolas Aranciaga +5 more
wiley +1 more source
Runge–Kutta optimization‐based selective harmonic elimination in an H‐bridge multilevel inverter
IET Power Electronics, Volume 16, Issue 11, Page 1849-1865, 19 August 2023., 2023 This study utilizes the Runge–Kutta (RUN) metaheuristic optimization algorithm to demonstrate the Selective Harmonic Elimination Pulse Width Modulation (SHE‐PWM) technique in multilevel inverters (MLIs), including 5‐ and 7‐level modified H‐bridge (MHB) topology and a 9‐level asymmetric cascaded H‐bridge (CHB) inverter topology. The switching angles are
Injila Sajid +7 more
wiley +1 more source
Real-Time Adaptive Selective Harmonic Elimination for Cascaded Full-Bridge Multilevel Inverter
Energies, 2022 Selective Harmonics Elimination is a high-efficiency modulation method for multilevel inverters that allows handling very high voltage applications. It eliminates the most significant harmonics and fixes the desired fundamental component.
Miguel Vivert +5 more
doaj +1 more source
Fast and fault‐tolerant model predictive control of MMCs under selective harmonic elimination
IET Generation, Transmission &Distribution, Volume 17, Issue 1, Page 240-251, January 2023., 2023 This paper proposes an MPC strategy to control an MMC operating with SHE while adding FT capabilities to its operation. A modification process is proposed for SHE to maintain its harmonic performance during FT operation. To complete the transition, an MPC strategy is proposed to increase the capacitor voltages of the MMC and control the circulating ...
Ardavan Mohammadhassani +1 more
wiley +1 more source
Monomial s-sequences arising from graph ideals
Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2023 Ideals arising from graphs are investigated via s-sequence theory. In particular, the notion of s-sequence for the generators of the edge ideal I(G) of an acyclic graph G is considered for describing the Groebner basis of the relation ideal J of the ...
Maurizio Imbesi, Monica La Barbiera
doaj +1 more source
Intelligent Approach for Control Techniques Based on Complex Converter Structures
International Journal of Energy Research, Volume 2023, Issue 1, 2023., 2023 Hybrid frequency control strategies are used to eliminate the problem of current inversion in multilevel cascaded asymmetrical H‐bridge inverters. Unfortunately, this technique results in unbalanced power at the inverter output. The improved hybrid PWM modulation strategy helps to regulate power balances within a reasonable range at high and low ...
Kitmo +5 more
wiley +1 more source
A Forward Solution Algorithm of 6RUS Parallel Mechanism Based on Dual Quaternion Method
International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 2023 The 6RUS parallel manipulator is a highly versatile and widely used robotic mechanism with six degrees of freedom. Its intricate kinematic structure and its capability to perform complex motion tasks have garnered significant research interest in recent years.
Guangyu-yu Dong +3 more
wiley +1 more source
Rationalizing Denominators Using Gröbner Bases
Complexity, Volume 2022, Issue 1, 2022., 2022 The problem of rationalizing denominators for two types of fractions is discussed in the paper. By using the theory and algorithms of Gröbner bases, we first introduce a method to rationalize the denominators of fractions with square root and cube root, and then, for the denominators with higher radical of the general form, the problem of rationalizing
Dongmei Li +4 more
wiley +1 more source
Allocation of Optimal PMUs for Power System Observability Using PROMETHEE Approach
International Transactions on Electrical Energy Systems, Volume 2022, Issue 1, 2022., 2022 Phasor measurement units (PMUs) are becoming a vital measurement device in wide‐area monitoring, operation, and control. The allocation of PMU at each bus will make that bus directly observable. However, considering the high installation costs, it is not feasible to place PMU at each bus.
Shubhrajyoti Kundu +4 more
wiley +1 more source