The characteristics of vascular bundle in the first internode from top and grain-filling of heavy panicle type hybrid rice(HPTHR) were studied. The results were as follows: The HPTHR had more vascular bundles and a mu...The characteristics of vascular bundle in the first internode from top and grain-filling of heavy panicle type hybrid rice(HPTHR) were studied. The results were as follows: The HPTHR had more vascular bundles and a much bigger area of single vascular bundle, all vascular bundle, all phloem and all xylem in the first inter-node than Shanyou63. The vascular bundles had the similar load of spikelet number and sink capacity between the HPTHR and Shanyou63. The HPTHR had not only a larger sink but also normal grain-filling and sink-filling, high seed-setting rate and heavier panicle. Those characteristics of vascular bundle were the biological bases for the larger and heavier panicle of HPTHR. The results also indicated that the breeding model of HPTHR was an effective measure for the super high-yielding rice breeding.展开更多
In order to increase the efficiency of solar collector, a methodology is proposed based on the analysis of its influencing factors, such as thermal conductivity of filled layer, structure forms of filled layer and hea...In order to increase the efficiency of solar collector, a methodology is proposed based on the analysis of its influencing factors, such as thermal conductivity of filled layer, structure forms of filled layer and heat loss coefficient. The results of analysis show that the heat transfer between pipes in evacuated tube is one of the most important factors, which can lead to the decrease of the outlet temperature of working fluid. In order to eliminate the negative influence of the heat transfer between pipes, the hollow filled-type evacuated tube with U-tube(HUFET) was developed, and the heat transfer characteristics of HUFET were analyzed by theoretical and experimental studies. The results show that the thermal resistances decrease with the increase of the thermal conductivity of filled layer. When the thermal conductivity is over 10 W/(m·K), the change of thermal resistances is very little.Furthermore, the larger the thermal conductivity of filled layer, the less the rate of the energy transfer between the two pipes to the total energy transfer, which is between the absorber tube and the working fluid. There is a little difference between the efficiencies of HUFET and UFET, with the efficiency of HUFET 2.4% higher than that of UFET. Meanwhile, the validation of the model developed was confirmed by the experiment.展开更多
The relation and unity of the tectonic process and sedimentation is being paid a good deal of attention. It is very obvious that the sedimentary process of the terrestrial basin is controlled by tectogenesis. The sedi...The relation and unity of the tectonic process and sedimentation is being paid a good deal of attention. It is very obvious that the sedimentary process of the terrestrial basin is controlled by tectogenesis. The sedimentary evolution of the basin is the reflection of the tectonic evolution . The sedimentary process of the terrestrial basin has unique characteristics.(1) The scope of the terrestrial basin is mainly controlled by the fault zones.(2) The regional tectonic cycle obviously controls the sedimentary sequence boundary of the terrestrial basin. The periodicity of tectogenesis causes the periodic change of the sedimentary sequence.(3) The sedimentary model of the terrestrial basin is obviously controlled by the tectonic framework.(4) There are many surprise sedimentary events in sedimentary formation of the terrestrial basin.(5) Owing to the influence of the tectonization, the deformation frequently occurs in the sedimentary deposit.(6) Because the sediments of the terrestrial basin have the short\|distance transport, the sediments have the low mature index.(7) There are more sedimentary centres, more matter\|sources, narrow sedimentary facies\|zone and the quick facies change in the terrestrial basin.According to the background of the tectonic dynamics, the terrestrial basin can be divided into the extension basin, the compression basin and the shear basin. The three basins differ greatly in the sedimentary characteristics. The extension basin is usually directed at rift basin. The border of the extension basin is mainly the normal fault or growth fault. The plane shape of the extension is zone\|shape. The sedimentary deposit of the extension basin has not strong deformation. The thickness of the sediment on the downthrow wall is greater than that the sediment on the upcast wall. The periodic change of the tectogenesis causes the enlarging or the contract of the extension basin.展开更多
文摘The characteristics of vascular bundle in the first internode from top and grain-filling of heavy panicle type hybrid rice(HPTHR) were studied. The results were as follows: The HPTHR had more vascular bundles and a much bigger area of single vascular bundle, all vascular bundle, all phloem and all xylem in the first inter-node than Shanyou63. The vascular bundles had the similar load of spikelet number and sink capacity between the HPTHR and Shanyou63. The HPTHR had not only a larger sink but also normal grain-filling and sink-filling, high seed-setting rate and heavier panicle. Those characteristics of vascular bundle were the biological bases for the larger and heavier panicle of HPTHR. The results also indicated that the breeding model of HPTHR was an effective measure for the super high-yielding rice breeding.
基金Projects(2011BAJ03B12-3,2013BAJ10B02-03) supported by the National Science and Technology Program during the 12th Five-year Plan Period,ChinaProject(51378005) supported by the National Natural Science Foundation,China+1 种基金Projects(DUT14RC(3)123,DUT14RC(3)129) supported by Fundamental Research Funds for the Dalian University of Tecnology,ChinaProject(DUT14ZD210) supported by the Fundamental Research Funds for the Central Universities of China
文摘In order to increase the efficiency of solar collector, a methodology is proposed based on the analysis of its influencing factors, such as thermal conductivity of filled layer, structure forms of filled layer and heat loss coefficient. The results of analysis show that the heat transfer between pipes in evacuated tube is one of the most important factors, which can lead to the decrease of the outlet temperature of working fluid. In order to eliminate the negative influence of the heat transfer between pipes, the hollow filled-type evacuated tube with U-tube(HUFET) was developed, and the heat transfer characteristics of HUFET were analyzed by theoretical and experimental studies. The results show that the thermal resistances decrease with the increase of the thermal conductivity of filled layer. When the thermal conductivity is over 10 W/(m·K), the change of thermal resistances is very little.Furthermore, the larger the thermal conductivity of filled layer, the less the rate of the energy transfer between the two pipes to the total energy transfer, which is between the absorber tube and the working fluid. There is a little difference between the efficiencies of HUFET and UFET, with the efficiency of HUFET 2.4% higher than that of UFET. Meanwhile, the validation of the model developed was confirmed by the experiment.
文摘The relation and unity of the tectonic process and sedimentation is being paid a good deal of attention. It is very obvious that the sedimentary process of the terrestrial basin is controlled by tectogenesis. The sedimentary evolution of the basin is the reflection of the tectonic evolution . The sedimentary process of the terrestrial basin has unique characteristics.(1) The scope of the terrestrial basin is mainly controlled by the fault zones.(2) The regional tectonic cycle obviously controls the sedimentary sequence boundary of the terrestrial basin. The periodicity of tectogenesis causes the periodic change of the sedimentary sequence.(3) The sedimentary model of the terrestrial basin is obviously controlled by the tectonic framework.(4) There are many surprise sedimentary events in sedimentary formation of the terrestrial basin.(5) Owing to the influence of the tectonization, the deformation frequently occurs in the sedimentary deposit.(6) Because the sediments of the terrestrial basin have the short\|distance transport, the sediments have the low mature index.(7) There are more sedimentary centres, more matter\|sources, narrow sedimentary facies\|zone and the quick facies change in the terrestrial basin.According to the background of the tectonic dynamics, the terrestrial basin can be divided into the extension basin, the compression basin and the shear basin. The three basins differ greatly in the sedimentary characteristics. The extension basin is usually directed at rift basin. The border of the extension basin is mainly the normal fault or growth fault. The plane shape of the extension is zone\|shape. The sedimentary deposit of the extension basin has not strong deformation. The thickness of the sediment on the downthrow wall is greater than that the sediment on the upcast wall. The periodic change of the tectogenesis causes the enlarging or the contract of the extension basin.
