نتایج جستجو برای: dredging
تعداد نتایج: 1245 فیلتر نتایج به سال:
Resuspension of sediments during dredging and dredged material disposal operations continues to be a primary concern of regulatory agencies charged with the protection of environmental resources. Consequently, almost all dredging projects incorporate some level of monitoring effort dedicated to measurement of sediment resuspension. In the majority of cases, turbidity is measured with optical se...
We construct portfolios of stocks and of bonds that are maximally predictable with respect to a set of ex ante observable economic variables, and show that these levels of predictability are statistically significant, even after controlling for data-snooping biases. We disaggregate the sources for predictability by using several asset groups, including size-sorted and industry-sorted portfolios...
This paper proposes new methodologies for evaluating out-of-sample forecasting performance that are robust to the choice of the estimation window size. The methodologies involve evaluating the predictive ability of forecasting models over a wide range of window sizes. We show that the tests proposed in the literature may lack the power to detect predictive ability and might be subject to data s...
Experimental scallop fishing was carried out using towed commercial dredges on sediments deposited by unattached coralline algae in order to quantify their sensitivity to damage from current fishing practices. These biogenic sediments are patchily distributed in European coastal waters (to -30 m depth around the UK and to -120 m in the Mediterranean) and are of international conservation import...
This paper proposes new methodologies for evaluating out-of-sample forecasting performance that are robust to the choice of the estimation window size. The methodologies involve evaluating the predictive ability of forecasting models over a wide range of window sizes. We show that the tests proposed in the literature may lack the power to detect predictive ability and might be subject to data s...
In this paper, we re-examine the profitability of technical analysis using the Reality Check of White (2000, Econometrica) that corrects the data snooping bias. Comparing to previous studies, we study a more complete “universe” of trading techniques, including not only simple trading rules but also investor’s strategies, and we test the profitability of these rules and strategies with four main...
This paper proposes new methodologies for evaluating out-of-sample forecasting performance that are robust to the choice of the estimation window size. The methodologies involve evaluating the predictive ability of forecasting models over a wide range of window sizes. We show that the tests proposed in the literature may lack power to detect predictive ability, and might be subject to data snoo...
The U.S. Army Corps of Engineers (USACE) performs routine maintenance dredging of federal navigation channels. Prior to dredging, an evaluation of the dredged material may be needed to determine the best management alternative. A dredging evaluation involves chemical and biological analysis to determine the potential impacts of the dredged material in both the water column during placement and ...
In 2015 the Gunungrowo Reservoir was dredged to reduce sedimentation. After dredging, it is necessary carry out sedimentation analysis determine reservoir life be achieved. This intended evaluate sediment deposition patterns that have occurred up and calculate can achieved after dredging in 2015. The analyzed based on how long dead storage has been filled with sediment. Sediment entering calcul...
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