As a basic building block in power systems, the three-phase voltage-source inverter (VSI) connects the distributed energy to the grid. For the inductor-capacitor-inductor (LCL)-filter three-phase VSI, according to different current sampling position and different reference frame, there mainly exist four control schemes. Different control schemes present different impedance characteristics in th...

Introduction. In vivo imaging of tumors treated with anti-angiogenic agents can reveal information about the therapeutic effects on tumor vasculature beyond simple tumor volume measurements. Vessel size index (VSI) MRI determines the fractional blood volume, mean vessel size, and Q (a dimensionless parameter related to vessel density) on a voxel-by-voxel basis, using changes in T2 and T2* cause...

Irritable bowel syndrome (IBS) is a chronic gastrointestinal (GI) disorder with a severe impact on quality of life (QoL). We explored the relationship of a visual measure of suffering, the PRISM-RII, with quality of life (QoL) and anxiety measures in IBS patients. Participants were 44 IBS patients who completed several questionnaires and kept a symptom diary for two weeks. The measures used wer...

The three-level neutral-point clamped voltage source inverter (3L-NPC-VSI) is widely used in the maglev traction systems due to its high output voltage, large capacity and low current harmonics. In order improve utilization of DC-bus an overmodulation strategy necessary. This paper proposes improved based on minimum amplitude error method for a 3L-NPC-VSI. Compared with conventional method, hig...

We recorded action potential activity from the isolated brain of the nudibranch seaslug Tritonia diomedea during fictive swimming. Candidate central pattern generator (CPG) interneurons were identified by their bursting patterns and positions in the brain. Previously identifed populations of interneurons were imaged, including the dorsal swim interneurons (DSI), C2, and ventral swim interneuron...

Microgrids represent a new and flexible form of electrical networks. This form is based on the use of Distributed Generators which are connected to a microgrid through Voltage Source Inverters (VSI). In this paper, we propose a nonlinear controller that allows the regulation of the output voltage and frequency of a VSI. The system consists of a VSI and an LC filter associated to a coupling indu...

Executive Summary1 The full article describes how Buckman, a U.S.-based chemical manufacturer, redefined itself and its IT organization using “value” as the focal point for analysis. Buckman’s Value Stream Initiative (VSI) used a microlevel, individual view of value as assessed by customers. The VSI project carried out a comprehensive and detailed micro review of the value of all key processes....

Rhythmic bursting in neurons is accompanied by dynamic changes in intracellular Ca(2+) concentration. These Ca(2+) signals may be caused by membrane potential changes during bursting and/or by synaptic inputs. We determined that membrane potential is responsible for most, if not all, of the cytoplasmic Ca(2+) signal recorded during rhythmic bursting in two neurons of the escape swim central pat...

© 2013 Myunghoi Kim et al. 827 In this paper, we present wideband common-mode (CM) noise suppression using a vertical stepped impedance electromagnetic bandgap (VSI-EBG) structure for high-speed differential signals in multilayer printed circuit boards. This technique is an original design that enables us to apply the VSI-EBG structure to differential signals without sacrificing the differentia...

This article proposes a dual two-level voltage-source inverter (DTL VSI) and its control to effectively integrate two dc sources into the multi-infeed ac/dc (MIACDC) power architecture of fully integrated energy systems (FIPESs). The current-controlled method is also synthesized proposed grid-connected DTL VSI. To this end, provides mathematical analyses comparing VSI with conventional VSIs (TL...