The paper demonstrates that -when compared to a simultaneous switch-on of all 3 phases- proper control of non-simultaneous switch-on as defined above can reduce both the motor impact stress and the current surges substantially. However, unproper successive switching-on may increase these unwanted ...
We investigate the internal thermal stress field of a three-phase inclusion of arbitrary shape which is bonded to an infinite matrix through an interphase layer. The three phases have different thermoelastic constants. It is found that the internal thermal stress field induced by a uniform change ...
In the context of this study, we can therefore assume that the sum of the currents injected into the phases of the machine is null: [2.18]ia+ib+ic=0 We also consider that this is balanced in electrical modeling terms (each phase has the same impedance – Rs, Ls –and e.m.f. value...
PREMISE OF THE STUDY: Regeneration niche differentiation promotes species coexistence and diversity; however, the ecological implications for the initial life phases of the majority of pteridophytes are unknown. We analyzed the sensitivity of gametophytes and juvenile sporophytes of the tree ferns Alsop...
Objective:To establish a 3 dimensional finite element model of calcaneus and talus for analysing their stress distribution during different gait phases. Methods: CT scanning and computer image processing system were used to establish the model to simulate the situation of calcaneus and talus for 3 ph...
1章练习题 Fill in the blanks. In the past century, language teaching and learning practice have been influenced by three different views of language: the view, the view and the view. 【答案】structural,functional,interactional 【解析】上世纪语言教学和语言学习受三种语言观的影响:结构主义,功能主义...
The constitutive relations, which link the stress and deformation state variables, are summarized for the soil structure, the water and air phases. The consoldiation theory is formulated by coupling the elastic equilibrium and continuity equations. Application to a one-dimensional case is presented. ...
The transformation routs depend on the mode of the applied stress and are related to the kinetics of transitions to the most stable phases. The slow-kinetics transformations in a moderate pressure range of technological importance, between... M Szafrański,A Katrusiak,K Sthl - 《Journal of Mater...
The three-phase 15-level MLI system comprises three identical phases. Each phase consists of ten switches, with six main switches functioning at a high frequency and four H-bridge switches controlled at a lower frequency. The inverter operates using a binary method to achieve fifteen levels of ...
Figure 3.6.2.Realization of a three-dimensional fracture network, showing the trace of the network on thexzface of the flow domain. The projection of an injection-withdrawal well pair, located in the center of the fracture plane, is also shown. ...