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改革开放以来,我国的高等教育体制改革取得了较为显著的成绩。首先,高等教育管理体制通过采取共建、合并、合作办学、划转企业和科研单位参与办学与管理等多种形式实行联合办学突破了过去的条块分割的局面,“迄今……208所中央部属学校以共建等形式从中央部门划转到地方;197所高校实现了各种方式的共建;317所学校开展了形式多样的校际间的合作办学,241所学校与5000多家企事业单位和科研院所实行协作办学;304所高等学校(其中普通高校228所,成人高校76所)合并组建为125所高等学校(其中普通高校121所,成人高校4所)。”[1]通过立法,强调政府转变… 相似文献
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徐宏明 《中国教育技术装备》2009,(7)
临近高考,很多学生不知道该怎么做,有点茫然,相当多的学生还是被动地接收,缺乏自己的复习思路。其实最后这个阶段,是复习效率最高,效果最显著,成绩提高最快的阶段。在此阶段地理复习中要善于总结方法,灵活运用,从而能够得心应手地解答高考试题。 相似文献
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The negative valve overlap (NVO) strategy of HCCI operation was experimentally investigated on a gasoline HCCI engine operated with variable valve timing in association with the addition of diesel fuel. The experimental results show that, by using gasoline and diesel blended fuels, the required NVO interval for suitable HCCI combustion under a given engine speed and a moderate compression ratio condition could be reduced, and the HCCI combustion region was extended remarkably without substantial increase in NOx emissions under a given inlet and exhaust valve timing due to the improvement of charge ignitability. In addition, the possible scale of NVO was extended. A substantial increase in the lean limit of excess air ratio and the upper limit of load range can be achieved because of higher volumetric efficiency, resulting from the decrease in the required NVO and the presence of less residual gases in cylinder. 相似文献
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The negative valve overlap (NVO) strategy of HCCI operation was experimentally investigated on a gasoline HCCI engine operated with variable valve timing in association with the addition of diesel fuel. The experimental results show that, by using gasoline and diesel blended fuels, the required NVO interval for suitable HCCI combustion under a given engine speed and a moderate compression ratio condition could be reduced, and the HCCI combustion region was extended remarkably without substantial increase in NO, , emissions under a given inlet and exhaust valve timing due to the improvement of charge ignitability. In addition, the possible scale of NVO was extended. A substantial increase in the lean limit of excess air ratio and the upper limit of load range can be achieved because of higher volumetric efficiency, resulting from the decrease in the required NVO and the presence of less residual gases in cylinder. 相似文献
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