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本文探讨了企业研究方法教学设计的相关问题.基于研究方法教学的特殊性,研究方法的教学设计与其他课程相比要做相应调整.本文还介绍了重视教学和学生相关实践相辅相成,重视交流、互动的教学方法,这种方法被实践证明是一种行之有效的教学方法. 相似文献
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《材料测试与研究方法》是材料相关各专业的专业必修课。该课程涉及内容广泛,有很强的理论性和实践性。目前主要存在"教材内容陈旧"和"实践教学困难"等问题。结合本人对材料化学专业《材料测试与研究方法》课程的本科教学实践,以培养学生学习动力与提高教学效果为出发点,主要探讨了该课程的教学内容与教学方法,介绍了相关的教学经验和教学心得。 相似文献
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工程流体力学的教学过程可为学生提供一个综合运用所学知识的练习平台,不仅是相关知识的学习,更是研究方法的训练。本文通过若干教学实例,探讨了如何在传授课程自身知识点的同时,培养学生综合运用知识的能力,并启发学生对一般方法论的掌握。 相似文献
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在教学设计理论及教育心理学的一般指导下,结合中学生的情感特点和本人的教学实践,探讨了兴趣在中学物理学习中的重要的作用,系统分析了学习兴趣的特点。在研究了相关的教育教学理论的基础上,结合前人已有的教学研究成果和本人的教学实践的一些想法,阐述了在中学物理教学中就培养学生学习兴趣的一些方法。 相似文献
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良好的教学情境对学生学习情感的产生具有很大的作用。有机化学是高职化学相关专业的一门基础课,文章阐述了如何在有机化学教学中设置项目情境,利用情境教学增加学生对企业的适应能力,以及利用情境教学激发学生使命感,提升学生的解决实际问题的能力的方法与途径。 相似文献
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K. Drouiche 《时间序列分析杂志》2007,28(6):793-806
Abstract. We investigate a new tool for measuring whiteness. We first introduce a quantity which has suitable properties for constructing a test for randomness. We provide the exact asymptotic power of our test. Finally, we experimentally assess the power and usefulness of our test. 相似文献
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<正> 电子能谱技术是近十几年才迅速发展起来的一门新技术。用一束具有一定能量的入射束轰击样品表面,收集并分析各种被激发出来的发射电子的能量,就可以测定原子或分子轨道上电子的束缚能,得到样品表面的许多重要信息。按照所使用的激发源和被测信号的不同,可以构成各种不同的电子能谱。这里介绍其中的一种,即化学分析的电子能谱(Electron Spectrumfor Chemical Analysis),简称ESCA;也可称做X线光电子能谱(X-Ray Photoelectron Spectrum)简称XPS。ESCA的基本原理是利用一定能量的X光照射样品表面,由光电效应而发射出光电子,测定这些光电子的动能就可以直接测定原子的内层电子和价电子的结合能。我们知道,每种元素都具有其独特的原子结构, 相似文献
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分析了梯形窗的时、频特性,推导了一种加梯形窗的频谱校正方法,即利用主瓣内最高谱线左右两侧的两条谱线,得到了加梯形窗的频谱校正公式.利用该算法对单频正弦信号的频率、幅值和相位的校正误差进行了仿真.仿真结果表明,该方法的频谱校正误差较小,且随着频率的增加,误差有所降低,其性能明显优于加矩形窗的校正精度. 相似文献
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Infrared Absorption Spectrum of Silicon Dioxide 总被引:1,自引:0,他引:1
RINOUD HANNA 《Journal of the American Ceramic Society》1965,48(11):595-599
The absorption spectra of fused silica and α-quartz were investigated in the 2600 to 50 cm−1 wave number region. Only part of the absorption frequency bands of the crystal quartz appeared in the fused state and some of them were shifted to higher wave numbers. The principal absorption frequencies in the fused silica were at 1126, 809, 452, and 200 cm−1 It is proposed that the infrared spectrum of the fused silica results from two vibrating units, of point group Td and D3 h , simultaneously. In the vitreous state, some of the Si-O-Si bonds are disrupted allowing random orientation of the tetrahedral SiO4 groups (point group Td ). As a consequence of the formation of nonbridging oxygen, the force constant will be increased, as indicated by the shift of the vibrational frequencies to higher values. For every nonbridging oxygen atom formed, the silicon atom previously connected to it would be left with a positive hole. The point group D 3 h is due to such a silicon atom and its v 3 and v 4 modes coincide with the v 3 and v 4 modes of the Td point group. 相似文献
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采用高效液相色谱法,建立了祖师麻药材的HPLC特征图谱。色谱柱为C18(5μm:4.6 mm×250 mm),以乙腈-0.05%磷酸溶液(9∶91)为流动相,流速0.9 m L/min,检测波长326 nm。特征图谱中有3个特征峰,以参照物祖师麻甲素的峰为S峰,其保留时间定为1,其他特征峰相对保留时间规定为:0.46(峰1)、0.79(峰2)、1.00(峰S)。经考察,所建立的祖师麻药材特征图谱耐用性较好,能很好的控制祖师麻药材的质量。 相似文献
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Neuromyelitis optica spectrum disorder (NMOSD) is an autoimmune central nervous system (CNS) inflammatory disorder that can lead to serious disability and mortality. Females are predominantly affected, including those within the reproductive age. Most patients develop relapsing attacks of optic neuritis; longitudinally extensive transverse myelitis; and encephalitis, especially brainstem encephalitis. The majority of NMOSD patients are seropositive for IgG autoantibodies against the water channel protein aquaporin-4 (AQP4-IgG), reflecting underlying aquaporin-4 autoimmunity. Histological findings of the affected CNS tissues of patients from in-vitro and in-vivo studies support that AQP4-IgG is directly pathogenic in NMOSD. It is believed that the binding of AQP4-IgG to CNS aquaporin-4 (abundantly expressed at the endfoot processes of astrocytes) triggers astrocytopathy and neuroinflammation, resulting in acute attacks. These attacks of neuroinflammation can lead to pathologies, including aquaporin-4 loss, astrocytic activation, injury and loss, glutamate excitotoxicity, microglial activation, neuroinflammation, demyelination, and neuronal injury, via both complement-dependent and complement-independent pathophysiological mechanisms. With the increased understanding of these mechanisms underlying this serious autoimmune astrocytopathy, effective treatments for both active attacks and long-term immunosuppression to prevent relapses in NMOSD are increasingly available based on the evidence from retrospective observational data and prospective clinical trials. Knowledge on the indications and potential side effects of these medications are essential for a clear evaluation of the potential benefits and risks to NMOSD patients in a personalized manner. Special issues such as pregnancy and the coexistence of other autoimmune diseases require additional concern and meticulous care. Future directions include the identification of clinically useful biomarkers for the prediction of relapse and monitoring of the therapeutic response, as well as the development of effective medications with minimal side effects, especially opportunistic infections complicated by long-term immunosuppression. 相似文献