Results 281 to 290 of about 19,194,670 (349)

Stresses in Current Medical Bibliography

New England Journal of Medicine, 1962
FROM the earliest days, scientists have exchanged visits and personal correspondence, and they have met together in conferences and societies to share information on their work. This is the oldest element of the communication system of science, and under the increased traffic of today it still provides an important link.
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Minimization of Current Stress for Dual Active Bridge Converters Based on Model Predictive Control With Enhanced ZVS Ability

IEEE transactions on industrial electronics (1982. Print)
Efficiency is a crucial concern for dual active bridge (DAB) converters. Although many studies on novel modulation schemes have attempted to improve the efficiency, achieving the optimal balance between current stress and zero-voltage-switching (ZVS ...
Dehao Kong, Xiaonan Gao, Zhenbin Zhang, Chuang Liu, M. Heldwein, Ralph M. Kennel   +5 more
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A Current-Stress-Optimized Design Method for Dual Active Bridge Converters With Improved ZVS Capability Under Wide Output Voltage Conditions

IEEE transactions on industrial electronics (1982. Print)
In dual active bridge (DAB) converters, the current stress seriously impacts the switching losses, and thus is tightly relevant to the efficiency. This article proposes a design method for the parameters of magnetic components, i.e., the inductance and ...
Hongwei Zhang, Zeng Liu, Ying Song, Pengcheng Han, Jinjun Liu   +4 more
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AI-Based Design With Data Trimming for Hybrid Phase Shift Modulation for Minimum-Current-Stress Dual Active Bridge Converter

IEEE Journal of Emerging and Selected Topics in Power Electronics
Dual active bridge (DAB) topology has been recognized as the key circuit for the next generation of high-frequency-link power conversion systems. In order to realize desired operating performance, DAB modulation strategies need to be selected carefully ...
Fanfan Lin, Xin Zhang, Xinze Li, Changjiang Sun, Gabriel Zsurzsan, Wenjian Cai, Chang Wang   +6 more
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Oxidative Stress and Hypertension: Current Concepts

Current Hypertension Reports, 2010
Hypertension is a major contributor to the development of renal failure, cardiovascular disease, and stroke. These pathologies are associated with vascular functional and structural changes including endothelial dysfunction, altered contractility, and vascular remodeling. Central to these phenomena is oxidative stress. Factors that activate pro-oxidant
Ana M, Briones, Rhian M, Touyz
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A Novel SVM Strategy to Reduce Current Stress of High-Frequency Link Matrix Converter

IEEE transactions on industrial electronics (1982. Print)
High-frequency link matrix converter (HFLMC) can directly realize dc/ac conversion without intermediate energy storage components, reduce the power conversion stage, and improve efficiency and power density.
P. Jin, Yunqing Hu, G. Lei, Yujing Guo, Jianguo Zhu   +4 more
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Degradation in AlGaN-based UV-C LEDs under constant current stress: A study on defect behaviors

, 2020
Defect behaviors in the degradation of AlGaN-based UV-C light emitting diodes (LEDs) under constant current stress have been intensively investigated in this work.
Yingzhe Wang, Xuefeng Zheng, Jiaduo Zhu, Linlin Xu, Shengrui Xu, Renli Liang, J. Dai, Peixian Li, Xiaowei Zhou, Wei Mao, Jincheng Zhang, Xiao-hua Ma, Y. Hao   +12 more
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Stress Fractures: Current Concepts

2017
A stress fracture is a partial or complete solution of continuity in the bone, which can result from excessive repeated loads at submaximal intensity, resulting in greater bone reabsorption without equivalent bone ingrowths. Stress fractures in football players are particularly difficult to diagnose and treat, because of the specificity of the modality
João Espregueira-Mendes, André Costa, Pedro Pessoa, C. Niek Van Dijk   +3 more
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Current Guidelines on Stress Ulcer Prophylaxis

Drugs, 1997
Acute uppergastrointestinal bleeding in intensive care unit (ICU) patients may occur due to peptic ulcer disease, adverse drug effects, gastric tube lesions, acute renal failure, liver failure or stress-induced gastric mucosal lesions. Gastric acid hypersecretion can be observed in patients with head trauma or neurosurgical procedures.
M, Tryba, D, Cook
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Stress fractures: Current concepts

Skeletal Radiology, 1978
1. Stress fractures result from muscular activity on bones rather than from direct impact upon them. 2. The fatigue variety of stress fracture occurs in normal bone when abnormal muscular tension or torsion is placed upon it. 3. The insufficiency type of stress fracture results when normal muscular stress is placed upon a bone with deficient elastic ...
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