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新课程改革方案的实施,需要全方位的保障机制。推行班级民主化、科学化管理,优化班级管理机制,充分调动全体学生的自主创新意识,可为新课改的顺利实施提供优良的环境保障。在新课改的背景之下,作为班主任,如何利用恰当措施进行班集体的管理工作是一门深刻的学问。班级管理要快乐点,效率高点,一靠民主,二靠科学。 相似文献
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Kernel Model Applied in Kernel Direct Discriminant Analysis for the Recognition of Face with Nonlinear Variations 总被引：1，自引：0，他引：1
A kernel-based discriminant analysis method called kernel direct discriminant analysis is employed, which combines the merit of direct linear discriminant analysis with that of kernel trick. In order to demonstrate its better robustness to the complex and nonlinear variations of real face images , such as illumination, facial expression, scale and pose variations, experiments are carried out on the Olivetti Research Laboratory, Yale and self-built face databases. The results indicate that in contrast to kernel principal component analysis and kernel linear discriminant analysis, the method can achieve lower (7%) error rate using only a very small set of features. Furthermore, a new corrected kernel model is proposed to improve the recognition performance. Experimental results confirm its superiority (1% in terms of recognition rate) to other polynomial kernel models. 相似文献
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To compare mid-infrared(MIR)and near-infrared(NIR)spectroscopies for the determination of the fat and protein contents in milk,the same sample sets with varying concentrations of fat and protein were measured in the MIR range of 3 200-700 cm-1 and NIR range of 9 000-4 000 cm-1.The spectral features in the two regions were analyzed.The MIR spectra of milk were characteristic due to the MIR inherent molecular specificity,whereas the NIR spectra were relatively characterless due to the NIR low selectivity.Partial least squares(PLS)regression models for fat and protein were developed by using both MIR and NIR spectra.MIR data with no pretreatment gave better results than NIR data.The square correlation coefficient(R2)and the root mean square error of prediction(RMSEP)were 0.98 and 0.10 g/dL for fat and 0.97 and 0.11 g/dL for protein.With NIR techniques,satisfactory results were not obtained with raw data.However,NIR data after pretreatment gave similarly good results to the ones using MIR method.This paper indicates that either of the MIR and NIR spectral methods is reliable for the determination of the fat and protein contents. 相似文献
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The foremost acousto-optic tunable filter(AOTF) was proposed in 1967[1], but the appliedAOTF based on TeO2crystal was not put into practiceuntil 1974, when the non-linear optical design meth-od[2]was proposed. In recent years, AOTF has beenapplied widely as optical splitting component. And ithas attracted more and more attention for its meritssuch as rapid scanning speed, wide tuning range ofspectrum and large aperture of angle of incidence.AOTF is often used for spectrum measurement te… 相似文献
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两年的基础英语教学之后,应该进入“专业阅读”教学阶段。搞好“专业阅读”对于保证英语学习的延续性、提高学生的英语能力具有重要的意义。笔者拟将“专业阅读”放入整个英语教学系统中,尝试“创造性阅读”,以期提高学生的阅读能力和整体素质。一、后英语基础教学现状据调查结果显示,未来人才市场对外语方面的需求主要体现在商务往来、技术交流、科技翻译、同声传译等实用性英语,那些英语基础好、又能较好地以英语为工具开展业务的人士最受欢迎。不难看出,目前后期大学英语教学很难满足需要。有些院校后英语基础教学还是零,随着四级英语统… 相似文献
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