新时代高校教学秘书管理服务工作的变与不变

教学秘书职能的发挥保证了高等学校教学管理服务工作的正常运转,因此其是高等学校教学系统的重要组成部分。高校教学秘书主要从事管理服务工作,随着我国高等教育进入新时代,此项工作要面对一些新的变化,但是其基本的职能保持不变。对于管理服务工作的变与不变,高校教学秘书要加强学习,做好传承与创新。     

DSⅡ方程的Darboux变换及其孤立子解

本文找到了DSⅡ方程的Darboux变换,利用所给出的Darboux变换求得了DS Ⅱ方程的一簇解。还利用[1]中给出的规范变换自然地得到(2+1)维Heisenberg链的无限多个解。     

环形振子的能谱和波函数

文章应用量子力学中超对称性和形不变性的方法求解环形振子的能量本征值和本征函数。     

边界条件下的电磁场的正则量子化

利用Fadecv-Jakiw方法对带边界条件的电磁场进行量子化,将场变量的傅里叶展开的模作为新的动力学变量获得对易关系,所有的量子化过程都在经典解空间进行。计算了两无穷平行平面边界的Casimir能。     

Form Invariance, Noether and Lie Symmetry of Non-conservative Hamiltonian Systems in Phase Space

For the non-conservative holonomic Hamiltonian systems in phase space, the definition and criteria of the form invariance of the generalized Hamilton canonical equations were given. The relations among the form invariance, Noether symmetry and Lie symmetry were studied. The theory of the form invariance for the conservative holonomical systems was worked out. An example was given to illustrate the results.     

平移不变小波在图像融合中的应用

二元树复数小波变换（DTCWT）分析图像纹理特征,它具有：近似的移动不变性;在二维变换中具有良好的方向选择性、完备重构性、有限冗余性和计算高效性等优点.DTCWT能得到较好的图像纹理特征和具有更好的鲁棒性.在图像有较小位移情况下,基于DTCWT算法的融合结果要比DWT好得多,融合效果较好.     

Factorial Validity and Reliability of the Curricular Goals in Physical Education Questionnaire

This study aimed to examine the validity and reliability of an instrument designed to measure student perceptions of curricular goals in physical education, the Curricular Goals in Physical Education Questionnaire. Participants were 879 Finnish students from grades 7 to 9 (412 girls, 467 boys; mean age 13.81). An exploratory factor analysis was performed on Sample 1 (n = 287), revealing a four-factor solution and suggesting that factor structure be cross-validated with confirmatory factor analysis in Sample 2 (n = 592). Confirmatory factor analysis demonstrated an acceptable fit and supported the four-factor model. Tests for gender invariance supported configural, metric, and scalar invariance. Analyses of factor mean differences indicated that girls attributed more importance than boys to physical education’s health-related goals, social and emotional learning, and motor skill development. This study confirmed the validity of the Curricular Goals in Physical Education Questionnaire to assess student perspectives on curricular goals across gender. In order to improve factor structure the authors suggest the addition of an item measuring skill acquisition to future versions of the instrument.     

规范场论中引进协变导数的物理实质

一般认为粒子与场的相互作用是通过引进规范场实现的。其实，对自由粒子做局域规范变换，粒子就已被自动置于场的相互作用之中了。当使自由粒子整体规范变换向局域规范变换过渡时，场的相互作用发生了从“无”到“有”的变化，规范不变性遭到了破坏。通过协变导数引进规范场，虽然体现了粒子与场的作用，但那是让粒子恢复“自由状态”的抵消作用。     

成人依恋测量工具述评

文章介绍了国外常用的6个成人依恋测量工具(AAI、ASM、RQ、AAS、AAQ和ECR)以及国内对国外成人依恋量表的试用和修订现状,并且对当前成人依恋测量中存在的争论进行了讨论和展望。     

Obtaining secondary students’ perceptions of instructional quality: Two-level structure and measurement invariance

Students' perceptions of instructional quality have become an important information source for teachers' professional development. This requires knowledge of the structure of these perceptions, their validity, and generalizability. To this end, we conducted a study with 15,005 German 512 grade students from 690 classrooms in three different school types and three different grade levels. Assuming three basic dimensions of instructional quality with 7 facets, we investigated the factorial structure of students' perceptions with two-level confirmatory factor analyses as well as their generalizability with two-level measurement invariance analyses. Our results confirmed the postulated factorial structure and strict invariance across subject groups, school types, and grade levels. We confirmed the same structure in teachers' assessments of their instructional quality that were positively correlated with the students' assessments. As such, these findings shed light on the structure, validity, and generalizability of students’ perceptions of instructional quality.