to evaluate the effects of nitrogen management at yellow budding stage on seed yield with using nitrogen nutrition index (ratio of nitrogen concentration in the plant to optimum concentration), of rapeseed farms in gorgan, an experiment was conducted as a nested model arranged in a complete randomized design (crd) in 2010. fifteen rapeseed fields were classified at three levels of management (o...

In this study, biodiesel production from microalgal oil by microwave-assisted transesterification was carried out to investigate its efficiency. Transesterification reactions were performed by using Chlorella protothecoides oil as feedstock, methanol, and potassium hydroxide as the catalyst. Methanol:oil ratio, reaction time and catalyst:oil ratio were investigated as process parameters affecte...

There are two possible topologies to fabricate fiber optic resonators which contain a single, low-loss coupler. The first resonators reported in the literature were of the spliceless design and required a high splitting ratio coupler; they are denoted as a cross-coupled fiber resonator (CFR). The development of low-loss splicing technology enabled rings to be constructed from low splitting rati...

This study investigated the optimum mixture ratio of greenhouse tomato plant residues, wheat straw, and separated dairy manures for composting. Five 127-L laboratory-scale bioreactors were used to investigate the effect of separated dairy manure addition on the composting process of a tomato plant residues-wheat straw mixture. The wastes were mixed at 5 different ratios during the trials and we...

Solid-state fermentation conditions were investigated for cellulase production by marine Aspergillus ZJUBE-1 using crop straw as the main material. When Aspergillus ZJUBE-1 was grown under the condition: ratio of rice straw to wheat bran was 1:1, the ratio of material to liquid was 1:2, the ratio of nitrogen and carbon was 5.6%, NaCl was 2.4~4.0%, temperature at 37 °C, the maximum CMCase activi...

In present work, a compressor configuration is taken from literature which will be studied for aspect ratio (ratio between length of blade to chord length) influence over performance. Performance in the sense is pressure ratio of compressor. The aspect ratio of the blade is an important parameter and has a strong influence on the performance of axial flow compressor. There are so many literatur...

The syntheses of hydroxymethylenebisphosphonic acid derivatives (dronic acid derivatives) starting from the corresponding substituted acetic acids and P-reagents, mainly phosphorus trichloride and phosphorous acid are surveyed according to the solvents applied. The nature of the solvent is a critical point due to the heterogeneity of the reaction mixtures. This review sheds light on the optimum...

Optimum scalar quantization is considered for the IIR filter and quantization system presented in "Power reduction in wireless receivers through multistage digital filtering and quantization" [1]. In [1], only suboptimum uniform quantization was used. An optimum scalar quantizer was constructed for a training sequence with a Signal to Interference ratio of −40dB, as was considered in extensivel...

On-line algorithms have been extensively studied for the onedimensional bin packing problem. Semi-online property relax the online prescription in such a way that it allows some extra operations or the algorithm knows more (e.g. the optimum value) in advance. In this paper we present an improved lower bound for the asymptotic competitive ratio of any on-line bin packing algorithm which knows th...