浅谈高考政治主观题解题思路

高考主观题是政治高考取得高分的难点,这一难点主要有三个方面：一是考生对题意把握不准确;二是主观题类型多;三是得分点难全面。针对以上的难点,教师可从提高学生阅读和提取题目中心的能力、教师帮助考生提高归纳解题思路能力及提高考生全面思维能力三种办法来解决。     

一类微分方程组正周期解的存在性

根据锥上不动点指数理论,研究了微分方程组正周期解的存在性。应用线性问题的第一特征值和拓扑度理论建立了其正解的存在性定理。     

计算机基础教学中常见问题分析

在高师多年的计算机信息技术基础教学过程中,发现学生在Windows部分的复制与移动、建立快捷方式、文件重命名、Word部分的编辑排版等多个方面容易出现问题。分析这些常见的问题,然后提出了应对措施。     

我国最低工资制度的现状分析

文章分别从最低工资标准的制定以及最低工资制度的执行这两个方面,对我国最低工资制度的现状进行了分析,并提出了有针对性的建议,包括进一步提高最低工资标准、改进地方政绩的评价体系以及加强监督管理等。     

Simplexmethod建模研讨

目的 Linear Programming的simplexmethod建模求最优解。方法应用simplexmethod.结果建立了LinearProgramming的数学模型并用simplexmethod求得了最优解.结论因为单纯形表反映了Linear Programming的所有信息,故用simplexmethod可简便地求得最优解.simplexmethod的基本思路是：先将Linear Programming用sim-plexmethod划为标准型,根据问题的标准型,进行初等行变换,将主元素列除主元素化为1外其余的元素均化为0,当基变量值全为非负时,问题就得到了最优解.     

Anisotropic fluoride nanocrystals modulated by facet-specific passivation and their disordered surfaces

Rutile-type fluorides have been proven to be active components in the context of emerging antiferr-omagnetic devices. However, controlled synthesis of low-dimensional, in particular two-dimensional (2D), fluorides in a predictable and deterministic manner remains unrealized because of a lack of efficient anisotropic control, which impedes their further development in reduced dimensions. We report here that altered passivation of {110} growing facets can direct the synthesis of rutile-type fluoride nanocrystals into well-defined zero-dimensional (0D) particulates, one-dimensional (1D) rods and 2D sheets in a colloidal approach. The obtained nanocrystals show positive exchange bias and enhanced magnetic transition temperature from the coexistence of long-range antiferromagnetic order and disordered surface spins, making them strong alternatives for flexible magnetic devices and sensors.     

Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing

Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic (1-x)BiTi_(1-y)/2Fe_yMg_(1-y)/2O₃–(x)CaTiO₃ (BTFM–CTO) solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μ_B/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10⁻⁷ s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition, phase, and structure that can be easily scaled up for industrial applications.     

论大学生的科研能力及培养途径

培养具有创新精神和实践能力的高级专门人才,发展科学技术文化,是高等教育的历史使命。在高校中大力推进“科教兴国”战略的实施和科学技术创新,努力培养广大青年学生的科学研究能力,使其具备一定的创新意识、创造能力和创业精神,造就一代适应未来挑战的高素质人才,已经成为当代教育发展的必然要求。     

高职英语听力教学的障碍与解决方法

听是英语应用能力的主要体现,对高职学生尤为重要。目前,高职英语听力教学中还存在很多障碍,尤以应试教育机制、教学设备、教材和学生心理因素等问题最为突出。如果采取合理的措施,这些问题是可以解决的。     

KdV方程组的对称与群不变解

主要考虑KdV方程组的一些简单对称及其构成的李代数，并试图利用对称约化的方法得到此方程的群不变解。