小微企业抽样调查的样本轮换

目前,小微企业抽样调查数据受到各级政府和社会各界的高度关注。针对小微企业单位新增、消亡变动频繁的特点,研究了总体单位及样本量变动的一般条件下的样本轮换理论,对样本轮换率和估计量进行了探讨,扩大了研究结果的适用范围,得到了简单随机抽样、分层抽样中样本轮换的有关结论,对估计量的抽样误差进行了有效控制,并进行了相关实证研究,最后提出了构造适合小微企业连续性抽样调查的样本轮换设计模式和方法。     

北半球斜上抛体的运动方程

给出了同时考虑地球自转和空气阻力两种影响并当空气阻力与抛体速度的一次方成正比时北半球斜上抛体运动方程的精确解.     

角动量守恒仪的新实验开发（续）

本文介绍了在角动量守恒仪上最近开发出来的一个新实验──在刚体定轴转动情况下验证机械能守恒定律。     

论旋转式投掷铅球技术的优越性

本文从动力学的角度对旋转式投掷铅球技术进行了分析 ,认为该技术具有可增大作用力时间使铅球出手速度更快 ,双腿支撑效果更好 ,最后用力时间更短的优势     

试论增强城乡教师交流意愿的四项基本制度

我国地方教育行政建立了城乡教师交流制度,但在制度实施中教师交流意愿不强,教师对交流制度总体满意度偏低。增强城乡教师交流意愿,可以借鉴日韩经验,从确立教师交流义务化的前提制度,完善城乡教师一体化的保障制度,设置补、奖为主的补偿制度和配备教育行政主导的操作制度等方面来完善城乡教师交流制度。     

Supervision and social work students: relationships in a team-based rotation placement model

Social work has historically privileged one-to-one supervision in field education. However, in recent decades, the relentless pressure on organisations to innovate for efficiency gain has created an impetus to explore alternative placement formats. This article reports on how students and supervisors experienced their placement relationships in the context of one such alternative—a team-based rotation placement model where students routinely engaged in group and peer supervision as well as one-to-one supervision with various supervisors. A total of 128 Masters of Social Work students and 92 student supervisors participated in rotation placements across five hospitals over a three-year period; 2011–2013. The study adopted a mixed methods approach using online surveys and post-placement interviews each year. The findings suggest that, although both supervisors and students viewed the one-to-one supervisory relationship as pivotal, they experienced this relationship differently. Supervisors were more likely to highlight the interpersonal connection within the supervisory relationship as the primary vehicle for practice learning. Students were more likely to view their supervisory relationships as the conduit to the practice experiences that aligned with their placement goals. Ultimately, the study highlights the centrality of role and positioning when exploring perceptions and experiences of teaching and learning relationships on placement.     

On a differential equation approach to the weighted orthogonal Procrustes problem

The weighted orthogonal Procrustes problem, an important class of data matching problems in multivariate data analysis, is reconsidered in this paper. It is shown that a steepest descent flow on the manifold of orthogonal matrices can naturally be formulated. This formulation has two important implications: that the weighted orthogonal Procrustes problem can be solved as an initial value problem by any available numerical integrator and that the first order and the second order optimality conditions can also be derived. The proposed approach is illustrated by numerical examples.     

Investigating the Risks of Spiritual Leadership

The spiritual leadership literature suggests that such leadership has a positive influence on organizations’ productivity and profitability as well as on employees’ enjoyment and well‐being. In a qualitative study conducted at a Swedish abbey for nuns, using interviews, observations, correspondence, and documents, this research indicates that spiritual leadership may pose negative risks to organizations and their leaders. Risks in spiritual leadership that are indicated include a culture of narrow‐mindedness and leadership rotation failure that can lead to rigidity and to the leader's work overload because of the demand for limitless empathy and for personal sacrifice. The findings should be viewed as an inspiration for further research.     

Mesurer les coǔts de licenciement: de l'intérět des méthodes directes

Les coǔts de licenciement, ainsi que l'appareil législatif et réglementaire régissant les relations professionnelles, sont souvent blǎmés pour les mauvaises performances du marché du travail. Toutefois, les études théoriques et économétriques sur l'impact économique de ces coǔts ne sont pas concluantes. Par le passé, on s'est surtout intéressé aux hypothèses fonctionnelles et à l'incidence des divers paramètres, mais on a très peu analysé la qualité et la précision des méthodes de mesure de ces coǔts, dont dépendent pourtant la plupart des résultats en cette matière. L'auteur examine les méthodes de mesure directes et indirectes couramment utilisées en ce domaine, et soutient qu'il est essentiel d'employer les méthodes quantitatives directes, rarement utilisées par les chercheurs, pour compléter les méthodes de mesure indirectes auxquelles on a généralement recours. Ce point est illustré par les résultats d'un sondage expérimental récemment mené en Australie.     

Multitaper testing of spectral lines and the detection of the solar rotation frequency and its harmonics

We develop statistical testing methodology for closely spaced spectral lines based on multitaper spectrum estimates and apply it to a time series of solar magnetic field magnitude data recorded by the Ulysses spacecraft. The test is formulated through complex-valued weighted least squares. Using this test in combination with the test for well-separated lines, we can accurately detect the solar equatorial rotation frequency of the sun, and its harmonics, from data recorded by Ulysses's magnetometer at solar mid-latitudes; this is a potentially important result for solar physicists, since it has implications for the structure and dynamics of magnetic fields in the solar corona.