基于“3L”教学模式的实践探索——以在“练中学”的计算机教学为例

上海电视大学浦东新区分校积极应用推广“3L”教学模式。以一次活化模式的计算机课堂教学活动为例,该课程选择在“练中学”的方式进行教学,通过获得学生的反馈和教师的教学反思,探讨如何通过活化模式教学来活跃课堂气氛,提高学生的学习投入度。     

基于STM32的远程升级系统的设计

本文介绍了一种基于STM32芯片的远程升级系统的设计方案。简述了从数据下载线、客户端、服务器到数据库MYSQL设计的全部过程,并提供了客户端、服务器的通信细节分析,提供了升级操作的可靠性和便利性。     

基于虚拟专用网技术的局域网的远程安全访问

随着计算机网络技术的发展,网络远程安全访问已引起人们的高度重视。本文阐述了虚拟专用网技术及Windows Server 2003 L2TP/IPSec VPN的实现。     

减压液相色谱法提取贯叶连翘中的金丝桃素

对减压液相色谱装置进行了改进，使其更加简单、实用，并首次应用到贯叶连翘中金丝桃素的提取．其结果与常压液相色谱相比较，令人满意．     

何首乌的快速繁殖技术

文章对何首乌的快速繁殖技术进行了研究。结果表明:采用MS+6-BA2.0mg/L+IBA0.1mg/L的培养基对诱导带侧芽茎段芽的分化效果最好,通过继代培养,出现芽增殖现象。诱导生根,以1/2MS+IBA0.25-0.5mg/L和1/2MS+NAA0.25-0.5mg/L效果较好。     

不同磷水平对番红花植株矿质营养吸收运转的影响

对番红花植株不同施磷水平的试验结果表明:不同磷水平时番红花植株N、P、K、Mg、Mn、Fe等矿质元素的吸收运转均有显著影响;低磷不利于番红花植株矿质元素地上部向地下部的运转,造成番红花新球茎矿质元素含量普遍偏低;随着施磷水平的降低,蛋白氮含量明显减少,蛋白质合成受阻,核酸及糖分减少,因而新球茎品质不高。     

基于模态振型和L1正则化的结构损伤识别

考虑到基于2范数的正则化算法存在对结构识别结果过度光滑的效果,提出了基于模态振与L1正则化的损伤识别方法。以—2D简支梁有限元模型为数值算例,比较了使用不同振型数不同损伤程度对损伤识别效果的影响。数值模拟结果表明,对于多损伤工况,当损伤结构的振型数和无损结构的振型数乘积数大于6时,能较好地进行损伤定位,并能对损伤程度给出定性的描述。     

Cloning and characterization of a glucose 6-phosphate/phosphate translocator from Oryza sativa

INTRODUCTIONNongreenplastidsofheterotrophictissuesarecarbohydrate importingorganellesand ,inthecaseofamyloplastsofstoragetissues,thesiteofstarchsynthesis.Investigationofwholetissuesfromavarietyofstarchsynthesizingcropplantsindicatedthathexoseunitswereimpo…     

The Indian Association for the Cultivation of Science: A Tortuous Tryst with Modern Science

The Indian Association for the Cultivation of Science (IACS) founded by Mahendra Lal Sircar in Calcutta in 1876 was the first large-scale indigenous enterprise in colonial India for the propagation of modern science. The efforts towards the formation of the IACS were marked by a range of ideas and positions which reflected mainstream elite Indian attitudes to western science as also the many paradoxes that the colonial situation imposed on the whole enterprise. The first exposures of the Indian elite to western education had evoked an admiration for modern science, its values, and its infinite possibilities. But the admiration so generated could not run on a momentum of its own because of the limitations of the colonial education system itself. The appreciation of modern science also brought about a soul-searching as to why a civilization with a hoary tradition of science had stagnated. This, in turn, led to vigorous socio-cultural self-criticism aimed at ending what was perceived to be long slumber and degeneration. Science itself was seen as a force for such liberation and the alien colonial government as its chief facilitator. The latter was not too eager to promote science at large. Hence the need for an indigenous initiative. However, the plain existential realities of colonialism dictated that little could be achieved without the support of the government. With all its paradoxes and ironies, the IACS project was yet a grand endeavour, forming a lasting part of the Indian scientific landscape. In fact, given its peculiar circumstances, it would have been very unreal without its paradoxes.     

相依数据密度估计的距离

基于X_1…X_n作未知密度f(x)的核估计f_n(x),文章在{x_n}_1~∞为平稳、(?)—混合过程且核函数不连续的情况下,得到了f_n(x)的一致强相合性和L_1—模相合性．