结构动力响应仿真计算

本文提出了一种新的求解结构动力响应的仿真算法。算法原理基于求解状态方程的增广矩阵法。该算法能够给出精度今人十分满意的计算结果。     

怎样正确使用Nernst方程

对Nernst方程使用时出现的问题进行了剖析,阐明了正确运用Nernst方程的方法.     

大学生宿舍人际关系与心理健康的模型研究——以温州职业技术学院为例

采用编制成册的量表和问卷对300名浙江省温州职业技术学院在校生进行调查分析。结果表明大学生宿舍人际关系质量与心理健康水平呈现显著相关。大学生的宿舍人际关系是心理健康水平的有效预测指标．改进宿舍人际关系有助于提升高职学生心理健康水平。     

高中学业水平考试研究(二):考试质量评价

学业水平考试试题和试卷的质量直接影响学业评价和诊断结果的有效性和可靠性。本文以上海市高中思想政治学科学业水平考试为例,从试题和题组功能偏差、试题得分与总分的相关系数、识别指数分析及分类一致性和准确性四个方面对考试的质量进行了定量评价,以介绍学业水平考试质量评价的方法。     

关于Pell方程Ax~2-(A±1)y~2=1(A∈Z~+,A≥2)

应用连分数的相关知识得出了形如Ax2-(A-1)y2=1(A∈Z+,A≥2)型Pell方程解的一个结果,清晰地表述了形如Ax2-(A-1)y2=1(A∈Z+,A≥2)型Pell方程的整数解的解集,同时得出形如Ax2-(A+1)y2=1(A∈Z+,A≥2)型Pell方程的解的情况。     

单调可积条件下BSDEs解的存在唯一性

通过构造逼近序列,利用Tanaka-Meyer公式,在生成元g关于y单调,关于z一般可积时,讨论倒向随机微分方程方程解的存在唯一性。     

Dimensions of Socio-economic Status and their Relationship to Mathematics and Science Achievement at Individual and Collective Levels

Applying two-level structural equation modelling techniques, the current study examined the dimensionality of socio-economic status (SES) and its relationship with mathematics and science performance at student and school levels. Data were drawn from population 2 (13-year-olds) of 17 countries in the Third International Mathematics and Science study (TIMSS). A set of items about the ownership of household materials was used to measure the dimensions of SES. For most of the countries, a general economic dimension and a cultural dimension were identified at the student level. The cultural dimension had the greatest impact on students' mathematics and science achievement. At the school level, however, only a general economic dimension was found in most countries. This dimension was interpreted to represent community wealth. It was found to be highly related to school mean maths-science achievement, except for the countries where an additional cultural dimension is identified. This cultural dimension can be interpreted as the community cultural resources and atmosphere, and is strongly related to average school mathematics and science achievement. The current study confirmed that the ownership of a set of household materials can be used as SES indicators in exploring its multifaceted feature at both individual and school levels. A similar model structure is found in different countries by applying these indicators, despite the fact that the content of the set of household possessions is different. The findings show that the latent structure of SES at individual level is different from that at the school level, and that SES dimensions have different effects on mathematics and science achievement at individual and school levels.     

Adolescents' Goal Orientations and Academic Achievement: Long-Term relations and gender differences

The purpose of this study was to compare the views of Finnish and US preschool teachers, administrators and parents on appropriate educational practices for children aged 3‐5. To obtain a measure of their attitudes toward quality practices with children, a 26‐item instrument was adapted from Developmentally Appropriate Practices in Early Childhood Programs Serving Children from Birth Through Age 8. Researchers in the USA and Finland were asked to administer the instrument to subjects they considered to be ‘representative’ of teachers, administrators and parents in their respective countries. Analysis‐of‐variance procedures were then used to determine the differences in views to quality programmes among the three groups in both countries. No significant differences were found among the three groups in the Finnish sample (F(2,69) = 1.34, p = ns). Among the US group, the parents were found to score significantly less than administrators (F(2,120) = 7.85, p < 0.0006). Multivariate analyses of variance procedures showed that administrators from the two countries did not differ significantly in any of the areas under study. The two areas where teachers tended to differ significantly were those of ‘teaching strategies’ (t = 3.13, df = 100, p = 0.002) and ‘language development’ (t = 3.98, df = 89, p = 0.000). Teachers in the USA tended to take a more structured approach to instruction in preschool programmes, using teacher‐directed (less appropriate) approaches and providing children with (less appropriate) drill and practice on language skills. Parents in Finland appeared more supportive of developmentally appropriate practices than their US counterparts and their views were more generally congruent with those of teachers and administrators. This study suggests that the construct of ‘appropriateness’ of beliefs/practices for children may be of value in comparative international child‐care studies, and it raises the issue of why a greater congruence in beliefs/practices exists in some countries.     

平面上一类两指标随机微分积分方程

Ｙｅｈ．Ｊ较详细地研究了方程系数α、β满足Ｌｉｐ条件和线性增长条件下方程有唯一强解．把上述方程推广到更一般方程中去（此类方程包含了一般二阶随机微分方程作为特例） 运用较Ｌｉｐ条件弱的条件得到强解的存在性和轨道唯一性．     

一种求解非线性方程全部实根的算法与实现

本文将模拟退火算法与根的逐步搜索方法相结合,给出了求解非线性方程全部实根近似值的一种算法,在Matlab环境下实现了该算法,通过数值实验证明了该算法的有效性,所求得的根具有较高的精度。