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ILP 프로세서에서 2-단계 데이터 값 예측기의 Aliasing에 대한 효과
박희룡,전병찬,이상정 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.4 No.2
To exploit instruction level parallelism(ILP) in ILP processor, it is necessary to overcome the limits of data dependency among instructions. The data value prediction is a method to remove the limitation. In this paper, two-level data value predictor and hybrid data value predictor are studied. And the performance of those schemes are compared and analyzed. Also, the effects of aliasing on PHT(Pattern History Table) are measured and analyzed. As a result of experiment, it is shown that is there ware occurred aliasing of about 88%-98% in two-level and hybrid predictor. But the aliasing's hit ratio is reduced about 50% when XOR was applied on PHT.
Byoung Ryong Jeong,Chiwon W. Lee 한국원예학회 2007 Horticulture, Environment, and Biotechnology Vol.48 No.5
The influence of various concentrations of NH₄? (0, 3, 6, 9, 12, and 15 me·L<SUP>-1</SUP>), NO₃? (0, 3, 6, 9, 12, 15, 18, and 21 me·L<SUP>-1</SUP>) and NH₄? + NO₃? (0+0, 3+3, 6+6, 9+9, 12+12, 15+15, and 18+18 me·L<SUP>-1</SUP>) on the growth and flowering of Petunia hybrida in the peat-lite (PL) and rockwool (RW) media was investigated. The highest shoot dry weight was obtained when plants were grown with 9 me·L<SUP>-1</SUP> + 9 me·L<SUP>-1</SUP> NH₄? + NO₃? in the PL medium among all treatments. When plants were fertilized with NH₄? alone, the highest shoot dry weight was obtained with 12 or 15 me·L<SUP>-1</SUP> and 9 me·L<SUP>-1</SUP> NH₄? in PL and RW, respectively. Plants fertilized with NO₃? alone produced the greatest shoot dry weight at concentrations greater than 12 me·L<SUP>-1</SUP> in both media. The N levels higher than these optimum concentrations reduced dry weight. Flowering was delayed as N concentration increased, especially with NO₃?. Rockwool was undesirable in producing quality plants when only NH₄? was used, since it produced smaller plants with NH₄?-related toxicity symptoms, especially at high N concentrations. However, both the NO₃? and the NH₄? + NO₃? treatments produced acceptable quality plants in RW.
Byoung Ryong Jeong,Chiwon W. Lee 한국원예학회 2004 Horticulture, Environment, and Biotechnology Vol.45 No.2
The influence of N forms and Cl? on solution pH and ion uptake in the hydroponic culture of Ageratum houstonianum (NH₄?-tolerant) and Salvia splendens (NH₄?-sensitive) for a time course of 216 h was investigated. The pH of the hydroponic solution (initially 6.50) supplied with either NH₄? or NH₄?+NO₃? was drastically lowered to 3.08, whereas that of the same solution supplied with NO₃? was raised up to 7.74. Solution pH changed more by ageratum than by salvia. The solution Cl? concentration did not influence solution pH significantly. However, the addition of Cl? in the solution lowered transpiration rate in both NH₄? and NO₃? treatments. Total N uptake was greatest in the NH₄? + NO₃? treatment and lowest in the NO₃? treatment. In the NH₄? + NO₃? treatment, NO₃? uptake was suppressed by NH₄? (to about 50%), while NH₄? uptake was not affected by NO₃?. The rate of Cl? uptake was lowest in the NH₄? treatment but was similar in the N₄? + NO₃? and NO₃? treatments. The uptake of K?, H₂PO₄?, SO₄²?, Mn²?, and Zn²? was significantly enhanced in the NH₄? treatment. The uptake rate of Ca²? and Mg²? was highest in the NO₃? treatment. Absorption of Cu²? and B was not affected by N source. Ion uptake was more stable in the solution containing both NH₄? and NO₃? than in the solution containing either NH₄? or NO₃?. The uptake rates of total N, NH₄?, NO₃?, Mn²?, Cu²?, and Zn²? were significantly higher in ageratum than in salvia, whereas those of Cl? and Mo were significantly lower in ageratum than in salvia. The amounts of total anion (TA) absorbed, but not total cation (TC), the difference (TC - TA), and sum (TC + TA) were all affected by N source, Cl? level and their interaction. The total anion and cation uptake was significantly depressed, due to reduced uptake of both TA and TC, but TC - TA was significantly increased in the NO₃? treatment compared to the NH₄? or the NH₄? + NO₃? treatments, especially in the absence of Cl?, Plant tissue ion contents were also affected by N source and Cl? level.