Results 41 to 50 of about 10,576 (266)

Research on Thyristor Reverse Recovery Behavior in High-Voltage Direct Current Transmission Converter Valves and Its Application in Integrated Protection Systems

Energies
The performance of converter valves is essential for the reliability and efficiency of high-voltage direct current (HVDC) transmission systems. Converter valves consist of multiple thyristor levels, each requiring regular testing to ensure proper ...
Cao Wen, Liang Song, Yu Huang, Dong Peng, Peng Zhang, Jianquan Liao, Longjie Yang, Shilin Gao   +7 more
doaj   +1 more source

A Fully Parallel Reverse Converter

, 2007
{"references": ["M. A. Soderstrand and et al. Eds, Residue number system arithmetic:\nmodern applications in digital signal processing, New York: IEEE\nPress, 1986.", "N. Szabo and R. Tanaka, Residue arithmetic and its applications to\ncomputer technology, New York: McGraw-Hill, 1967.", "B. Parhami, Computer arithmetic: algorithms and hardware designs,\
Hosseinzadeh, Mehdi, Molahosseini, Amir Sabbagh, Keivan Navi   +2 more
openaire   +2 more sources

Reverse converters for RNSs with diminished-one encoded channels [PDF]

Eurocon 2013, 2013
The diminished-one encoding is often considered when representing the operands in the modulo 2k+1 channels of a Residue Number System (RNS) since it can offer increased arithmetic processing speed. However, limited research is available on the design of residue-to-binary (reverse) converters for RNSs that use the diminished-one encoding in one or more ...
Evangelos Vassalos, Dimitris Bakalis, Haridimos T. Vergos   +2 more
openaire   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

A Dual-Transformer-Based Bidirectional DC–DC Converter of Using Blocking Capacitor for Wide ZVS Range

IEEE Access, 2020
In order to improve the efficiency of battery charging and discharging in a wide conversion gain, a dual-transformer-based full bridge converter using a block capacitor was proposed. By adding the blocking capacitor in the primary side of one transformer,
Yanke Liang, Xu Liu, Guokai Xu, Shuaichao Yue   +3 more
doaj   +1 more source

Epigenetic reprogramming of lineage switching in cancer

FEBS Letters, EarlyView.
Cancer cells rarely commit to a single identity. Epigenetic mechanisms and tumor microenvironment cues push epithelial cells toward flexible, hybrid states that can shift into mesenchymal, neuroendocrine, or stem‐like fates, driving metastasis, drug resistance, and tumor heterogeneity. Targeting the epigenetic regulators behind these transitions, using
Ezgi Boyvatlı, Burcu Akman, Ezgi Bağırsakçı, Nese Atabey, Serap Erkek‐Ozhan   +4 more
wiley   +1 more source

Application of new bidirectional DC/DC converter in uninterruptible power supply system

Dianzi Jishu Yingyong, 2018
In order to solve the uninterruptible power supply in the power flow of the uneven distribution and raising and reducing capacity problems, based on the bidirectional Buck-Boost DC/DC converter on the traditional topology from begin to research, a new ...
Fang Xupeng, Zhao Yang, Yu Zhixue
doaj   +1 more source

Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry

FEBS Letters, EarlyView.
EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri, Ayaka Nagasato‐Ichikawa, Keita Iida, Shuhei Kimura, Akira Imamoto, Mariko Okada   +5 more
wiley   +1 more source

Analysis and Investigation of Hybrid DC–DC Non-Isolated and Non-Inverting Nx Interleaved Multilevel Boost Converter (Nx-IMBC) for High Voltage Step-Up Applications: Hardware Implementation

IEEE Access, 2020
In significant cases, the generated voltage needs to be step-up with high conversion ratio by using the DC-DC converter as per the requirement of the load. The drawbacks of traditional boost converter are it required high rating semiconductor devices and
Mahajan Sagar Bhaskar, Dhafer J. Almakhles, Sanjeevikumar Padmanaban, Frede Blaabjerg, Umashankar Subramaniam, Dan M. Ionel   +5 more
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source