Results 21 to 30 of about 2,859,852 (278)
BMC Public Health, 2018 Background There is a recognised need for targeted community-wide mental health strategies and interventions aimed specifically at prevention and early intervention in promoting mental health.
Stewart A. Vella +14 more
doaj +1 more source
VSC-HVDC and Its Applications for Black Start Restoration Processes
Applied Sciences, 2021 System reliability is a measure of an electric grid system’s ability to deliver uninterrupted service at the proper voltage and frequency. This property of the electric system is commonly affected by critical processes, such as a total blackout.
Rafael Sanchez Garciarivas +7 more
doaj +1 more source
Black Hole Thermodynamics from String Theory [PDF]
, 1994 In this note we consider a stringy description of black hole horizon. We start with a nonlinear sigma model defined on a two dimensional Euclidean surface with background Rindler metric.
't Hooft +13 more
core +2 more sources
A Black Start Scheme Based on Modular Multilevel Control-High Voltage Direct Current
Energies, 2018 Modern society’s need for power and its dependence on power sources is increasing with its development. As a result the consequences of blackout accidents have become more serious. At present, only three sources can be regarded as black-start power
Zecheng Li, Guojun Tan
doaj +1 more source
Colliding Black Holes: The Close Limit [PDF]
, 1994 The problem of the mutual attraction and joining of two black holes is of importance as both a source of gravitational waves and as a testbed of numerical relativity.
A. A. Abramovici +10 more
core +3 more sources
Fast Cut Back Thermal Power Plant Load Rejection and Black Start Field Test Analysis
Energies, 2014 Fast and reliable black start plays a key role in improving the ability of the power system to resist the risk of large-scale blackouts. For a black start with high voltage and long-distance transmission lines, it is much easier to cause phenomena such ...
Kaiwen Zeng +5 more
doaj +1 more source
Thermodynamics of string black hole with hyperscaling violation [PDF]
, 2013 In this paper, we start with black brane and construct specific space-time which violates hyperscaling. In order to obtain the string solution we apply Null-Melvin-Twist and $KK$-reduction. By using the difference action method we study thermodynamics of
A Pourdarvish +21 more
core +2 more sources
Research on the Unit Black-Start Strategy Considering Recovery Path and Start Sequence
Sustainability, 2022 Large-scale power outage events bring serious economic losses to national and social development and cause bad impacts, and the reasonable formulation of a unit black-start strategy is the basis of power outage recovery. Firstly, the Dijkstra shortest path algorithm is used to search for the optimal recovery path of the unit to be started after a major
Jie Zhao +6 more
openaire +1 more source
Spin-orbit interactions in black-hole binaries [PDF]
, 2006 We perform numerical simulations of black-hole binaries to study the exchange of spin and orbital angular momentum during the last, highly nonlinear, stages of the coalescence process.
C. O. Lousto +3 more
core +2 more sources
Research on the black start of DC transformers based on soft converter control
Zhejiang dianli, 2023 The DC transformers with dual active bridge （DAB） topology is characterized by zero voltage switching （ZVS） and provides the basis for realizing lossless turn-off buffer by directly paralleling buffer capacitors.
TANG Xueteng +5 more
doaj +1 more source