نتایج جستجو برای: reserve

تعداد نتایج: 31583  

Journal: :Proceedings. Biological sciences 2003
Benjamin S Halpern Robert R Warner

Recent interest in using marine reserves for marine resource management and conservation has largely been driven by the hope that reserves might counteract declines in fish populations and protect the biodiversity of the seas. However, the creation of reserves has led to dissension from some interested groups, such as fishermen, who fear that reserves will do more harm than good. These perceive...

2015
Jingui Xue Feiran Zhao Yuqi Wang Jialin Gu Junjie Gao Xiaolong Wang Hua Zhou

Recent progress suggests that integrative cardiac reserve is important in coronary artery disease, chronic heart failure, cardiomyopathy, and other cardiovascular diseases. Integrative cardiac reserve includes coronary flow reserve, myocardial reserve, energy reserve, and heart rate reserve. In the case of stress reaction, coronary flow reserve can provide excessive blood and energy supply and ...

2004

Description The IMO may use ‘out-of-market’ sources of reserve in response to an operating reserve shortfall in the real-time constrained sequence.1 Operating reserve shortfalls occur when either the total amount of available MW offered in the market for a class of operating reserve is less than the IMO’s requirement for that class of reserve, or when the total amount of available MW offered fo...

2017
Nan Li Nikita Singhal Kory Hedman

Security-constrained unit commitment (SCUC) is a classical problem used for day-ahead commitment, dispatch, and reserve scheduling. Even though SCUC models acquire reserves, N-1 reliability is not guaranteed. This paper presents an enhanced securityconstrained unit commitment formulation that facilitates the integration of stochastic resources and accounts for reserve deliverability issues. In ...

2017
Maciej H. Kotowski John F. Kennedy

We investigate equilibrium bidding in first-price auctions with asymmetric reserve prices. For example, the auctioneer may set a low reserve price for one subset of bidders and a high reserve price for others. When used to pursue a distributional objective, lowering the reserve price for some bidders channels benefits toward marginal agents in the favored group and does not adversely impact non...

Journal: :acta medica iranica 0
mohammad hasan namazi department of cardiology, cardiovascular research center, shahid beheshti univercity of medical sciences, tehran, iran. morteza safi department of cardiology, cardiovascular research center, shahid beheshti univercity of medical sciences, tehran, iran. hosein vakili department of cardiology, cardiovascular research center, shahid beheshti univercity of medical sciences, tehran, iran habibollah saadat department of cardiology, cardiovascular research center, shahid beheshti univercity of medical sciences, tehran, iran. saeed alipour department of cardiology, cardiovascular research center, shahid beheshti univercity of medical sciences, tehran, iran. abdulkarim alhuthaifi department of cardiology, school of medicine, shahid beheshti university of medical sciences, tehran, iran.

myocardial fractional flow reserve (ffr) is a new index of the functional significance of intermediate coronary stenoses that is calculated from pressure measurements made during coronary arteriography. the aim of this study was to evaluate the correlation between non-hyperemic coronary pressure dicrotic notch and fractional flow reserve (ffr). a consecutive of 114 patients (73 men and 41 women...

Journal: :Neurobiology of aging 2011
Adam M Brickman Karen L Siedlecki Jordan Muraskin Jennifer J Manly José A Luchsinger Lok-Kin Yeung Truman R Brown Charles DeCarli Yaakov Stern

OBJECTIVE White matter hyperintensities (WMH), visualized on T2-weighted MRI, are thought to reflect small-vessel vascular disease. Much like other markers of brain disease, the association between WMH and cognition is imperfect. The concept of reserve may account for this imperfect relationship. The purpose of this study was to test the reserve hypothesis in the association between WMH severit...

Journal: :Circulation 2002
Jeroen J Bax Don Poldermans Arend F L Schinkel Eric Boersma Abdou Elhendy Alexander Maat Roelf Valkema Eric P Krenning Jos R T C Roelandt

BACKGROUND Chronic dysfunctional but viable myocardium may exhibit contractile reserve and/or intact perfusion. Segments with intact perfusion without contractile reserve are frequently observed inpatients with ischemic cardiomyopathy. The clinical relevance of this observation is unclear; in particular, the functional outcome after revascularization is unknown. Thus, contractile reserve (using...

F. Aminifar, M. Fotuhi-Firuzabad,

From the optimization point of view, an optimum solution of the unit commitment problem with reliability constraints can be achieved when all constraints are simultaneously satisfied rather than sequentially or separately satisfying them. Therefore, the reliability constraints need to be appropriately formulated in terms of the conventional unit commitment variables. In this paper, the reli...

Journal: :British heart journal 1995
C Di Mario R Gil M Sunamura P W Serruys

The development of quantitative angiography and the introduction of new imaging techniques cannot replace functional methods of assessing the severity of stenosis. Measurement of transstenotic pressure gradient and poststenotic flow velocity using miniaturised sensors with guidewire technology offers an alternative to the conventional non-invasive methods that is immediately applicable in the c...

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