基于空间思维能力培养的工程图学教学改革研究

工程图学课程对培养学生的制图能力有着极其重要的作用.目前,一些高校的工程图学课程并未足够重视培养学生的空间思维能力,这就使一些空间思维能力较差的学生对工程图学课程的学习产生心理障碍,进而慢慢丧失兴趣.因此,高校应培养和提升学生的空间思维能力,提高学生的创新能力,增强学生的工程图学空间思维,提高学生的想象能力和推理能力,使学生具有更加全面的制图能力.     

大豆生产者补贴政策改革促进农户种植结构调整了吗?——基于全国446个县的准自然实验

以大豆生产者补贴政策改革作为切入点,将政策实施地区和非实施地区视为一次部分省份优化大豆、玉米种植结构的准自然实验,通过构建PSM-DID模型,考察大豆生产者补贴政策改革对农户种植结构调整的影响及其作用机制.结果表明:(1)大豆生产者补贴政策改革对农户种植结构调整具有显著的时间异质性,政策改革初年(2017年)大豆与玉米的面积之比显著提高6.5％,虽然2018年大豆与玉米的相对补贴额度出现大幅度增长,但大豆与玉米的面积之比仅显著提高3.4％;(2)预期相对收益的提升是2017年农户调整种植结构的重要原因,然而,经过对新制度一年的适应后,农户对种植玉米的路径依赖、补贴错位、地租的不合理增长以及大豆、玉米相对价格不理想等问题逐渐凸显,2018年农户重新调整种植决策,补贴的激励作用被迫减弱.基于此,研究结论为统筹大豆、玉米补贴机制可以促进农户种植结构调整提供经验性证据,也为在农业供给侧结构性改革和大豆振兴压力下如何持续改善种植结构提供政策启示.     

体育强国视域下体育治理的问题与出路

体育治理是国家治理体系和治理能力现代化的重要内容,直接关乎国家治理的时代进程。近年来,国家层面相继提出“体育强国”“健康中国”战略,如何通过有效的体育治理来实现体育强国战略,是推动我国体育事业改革的重要课题。目前我国体育治理目标定位与现实社会环境之间还存在偏差,体育治理组织形态在一定程度上也影响体育政策的执行,同时体育治理利益多元博弈对体育治理方式提出挑战。体育治理必须以满足人民群众的体育文化生活需求为根本导向,从治理理念、治理主体、治理结构、治理方式等层面进行深度改革,助力体育强国的实现。     

怀疑主义与认知价值

当代知识论越来越重视认知价值的研究，但从认知价值角度去重新思考传统怀疑主义问题的研究却很少。历史上的怀疑主义者既认为我们无法拥有任何知识，又主张我们应该悬置判断。因此，他们不仅预设了一个高的知识标准，而且预设了一个价值标准：任何达不到知识标准的认知状态都是没有认知价值的。但这个价值标准是错误的，所以我们即使无法达到怀疑主义者所设定的知识标准，也不必悬置判断。假设怀疑主义者认为我们无法拥有任何知识，同时认可“有些达不到知识标准的认知状态也有认知价值”，那么怀疑主义就没有很大的威胁性，因为即使我们无法获取知识，也可以获得具有认知价值的东西，取得认知进步。此外，摩尔主义、语境主义、溯因主义这几种对怀疑主义的主要回应是否成功，最终都依赖于对认知价值的讨论。     

Leader-member exchange as a linking pin in the idiosyncratic deals - Performance relationship in workgroups

In the current investigation, idiosyncratic deals (i-deals; individualized work arrangements) are modeled as differentiated resources that shape leader-member exchange (LMX) relationships in workgroups. We integrate literature on leader-member exchange (LMX) with research on i-deals to argue that employee evaluations of i-deals received from the grantor –typically the leader- enhance employee perceptions of LMX, which in turn become instrumental in generating positive performance outcomes. Furthermore, because workgroup characteristics have potential implications on the relationship between a deal grantor and the deal recipient, drawing upon social identity theory of leadership, we reason that the i-deals-LMX relationship is affected by the overall value congruence among the group members. Cross-level moderated mediation analyses on multi source data obtained from 289 employees nested in 60 workgroups showed that the mediational role of LMX in the i-deals to performance outcomes relationship was weaker in high value congruence groups.     

Stereotype and National Attachment in Hong Kong Chinese Context: A Moderated Mediation Model of Perceived Inter-group Relationship and Age

The present study investigated the relationship between Hong Kong people’s stereotype toward Mainland people and their own national attachment (i.e., national identity, constructive patriotism, and uncritical patriotism). The role of inter-group relationship as mediator and age as moderator of that relationship were also tested. A total of 1753 local Hong Kong people aged 17–80 (mean age = 20.35 years, SD = 5.02) completed anonymous questionnaires regarding their stereotypes toward Mainland people, inter-group relationship with Mainland people, and national attachment. As expected, stereotypes toward Mainland people, inter-group relationship and national attachment showed significant positive associations with each other. More interestingly, it was found that the inter-group relationship mediated the relationship between stereotypes toward Mainland people and three domains of national attachment, with this indirect link being weaker for younger Hong Kong adults than for older Hong Kong adults. Implications of the present findings for future research are discussed, as well as potential interventions for increasing subjective national attachment to China, especially in young Hong Kong people.     

习近平新时代中国特色社会主义思想对青年成长的影响

正确认识习近平新时代中国特色社会主义思想的历史地位,深刻领会习近平总书记关于青年成长成才重要思想的重大意义,全面把握我国社会各领域青年群体价值观念的共同性特征及行为选择等方面的普遍性特点,解析习近平新时代中国特色社会主义思想对当代青年的影响,将习近平新时代中国特色社会主义思想融入当代青年思想政治教育的全过程,融入当代青年学习的全过程,融入当代青年党建工作的全过程,渗透于当代青年的思维方式、交往方式、生活方式和行为方式,推进在青年群体中培育的氛围建设,契合当代青年发展规律,引领当代青年健康成长。     

Cox regression of clustered event times with covariates missing not at random

Motivated by a recent tuberculosis (TB) study, this paper is concerned with covariates missing not at random (MNAR) and models the potential intracluster correlation by a frailty. We consider the regression analysis of right‐censored event times from clustered subjects under a Cox proportional hazards frailty model and present the semiparametric maximum likelihood estimator (SPMLE) of the model parameters. An easy‐to‐implement pseudo‐SPMLE is then proposed to accommodate more realistic situations using readily available supplementary information on the missing covariates. Algorithms are provided to compute the estimators and their consistent variance estimators. We demonstrate that both the SPMLE and the pseudo‐SPMLE are consistent and asymptotically normal by the arguments based on the theory of modern empirical processes. The proposed approach is examined numerically via simulation and illustrated with an analysis of the motivating TB study data.     

Conditional design of the EWMA median chart with estimated parameters

The exponentially weighted moving average (EWMA) chart is often designed assuming the process parameters are known. In practice, the parameters are rarely known and need to be estimated from Phase I samples. Different Phase I samples are used when practitioners construct their own control chart's limits, which leads to the “Phase I between-practitioners” variability in the in-control average run length (ARL) of control charts. The standard deviation of the ARL (SDARL) is a good alternative to quantify this variability in control charts. Based on the SDARL metric, the performance of the EWMA median chart with estimated parameters is investigated in this paper. Some recommendations are given based on the SDARL metric. The results show that the EWMA median chart requires a much larger amount of Phase I data in order to reduce the variation in the in-control ARL up to a reasonable level. Due to the limitation of the amount of the Phase I data, the suggested EWMA median chart is designed with the bootstrap method which provides a good balance between the in-control and out-of-control ARL values.     

我国亲告罪追诉模式之困境及其重构——以网络诽谤案件的证据收集问题为切入点

网络诽谤犯罪属于《刑法》规定的亲告罪类型，此类案件中被害人的证据收集能力受到较大制约，导致其面临“自诉困境”。对此问题，不论是亲告罪的选择性公诉化，还是公权力适当介入证据收集过程的处理路径均存在不足。《刑法修正案(九)》针对网络侮辱、诽谤犯罪的证据收集问题作出新规定，但是无法扩张适用于所有亲告罪类型。亲告罪的自诉困境凸显出我国对亲告罪确立的单纯自诉制追诉模式存在显著缺陷：不利于对被害人的平等保护，以及混淆告诉权和举证责任。重构亲告罪追诉模式的前提是对刑事法中的“告诉”进行重新解释，使其本质回归为诉讼条件，与证明责任“解绑”。在模式选择上，应确立混合告诉制的追诉模式，被害人提起告诉后，可以自主选择适用自诉程序还是公诉程序。