浅论电工实习指导教学

技工学校培养一名合格的维修电工,实习教学是非常重要的一部分,首先要培养学生学习兴趣。在教学中老师对学生要有爱心、信心和耐心。在实习过程中采用合理的教学方法和合理的教学计划是完成实习教学的重要组成部分。     

Production-based measures of risk for asset pricing

A stochastic discount factor for asset returns is recovered from equilibrium marginal rates of transformation inferred from producers’ first-order conditions. The marginal rate of transformation implies a novel macro-factor asset pricing model that does a reasonable job explaining the cross-sectional variation in average stock returns with plausible parameter values. Using a flexible representation of firms’ production technology, producers’ ability to transform output across states of nature is estimated to be high, in contrast with what is typically assumed in standard aggregate representations of firms’ production technology.     

保定市大学生医疗保险制度运行探析

为帮助大学生顺利完成学业,保障大学生享有基本医疗卫生服务权益,国务院于2008年年底决定将大学生纳入城镇居民基本医疗保险试点范围。制度运行两年多来取得了可喜的成绩,也暴露出许多问题。通过对保定市六所高校在校生进行问卷调查,发现问题集中表现为:大学生对制度了解较少,参保率低,学校医疗机构服务质量差、效率低,制度保障范围狭窄,转移接续难等。本文将根据分析结果,阐述问题根结所在,并试提出解决方案。目的是使大学生医疗保险制度真正能提高大学生的医疗福利水平,减轻大学生的医疗费用的负担。     

基于目标替代率的税延型商业养老保险扣除限额优化研究

我国养老保障体系三支柱发展严重失衡,为了缓解基本养老保险的压力,提升养老保险替代率,商业养老保险的发展迫在眉睫,税收递延型商业养老保险也开始试点。在2018年个税改革后,目前税收递延型商业养老保险推行办法下,中低收入群体无法享受实际税收优惠,高收入群体可享受的税收优惠有限且过低。本文以替代率为基准,根据精算平衡原理构建模型,对扣除限额进行优化研究,试图测算出与新个税办法匹配且有利于多层次收入水平的消费个体享受实际税优的扣除限额。同时,本文还对不同扣除限额下开始购买保险年龄、个税起征点、个人收益率及初始收入水平这四个参数变化对实际税优额的影响做了分析,得出所测算出的扣除限额的确较现行扣除限额更为合理,并提出了相关对策建议。     

A Statistical Model to Investigate the Reproducibility Rate Based on Replication Experiments

The reproducibility crisis, that is, the fact that many scientific results are difficult to replicate, pointing to their unreliability or falsehood, is a hot topic in the recent scientific literature, and statistical methodologies, testing procedures and p‐values, in particular, are at the centre of the debate. Assessment of the extent of the problem–the reproducibility rate or the false discovery rate–and the role of contributing factors are still an open problem. Replication experiments, that is, systematic replications of existing results, may offer relevant information on these issues. We propose a statistical model to deal with such information, in particular to estimate the reproducibility rate and the effect of some study characteristics on its reliability. We analyse data from a recent replication experiment in psychology finding a reproducibility rate broadly coherent with other assessments from the same experiment. Our results also confirm the expected role of some contributing factor (unexpectedness of the result and room for bias) while they suggest that the similarity between original study and the replica is not so relevant, thus mitigating some criticism directed to replication experiments.     

Does agricultural trade liberalization increase risks of supply-side uncertainty?: Effects of productivity shocks and export restrictions on welfare and food supply in Japan

Agriculture is the focus of much contention in free trade negotiations. The Japanese government is against liberalizing the rice trade on the grounds that it would threaten “national food security” in the events of such shocks as crop failure and embargoes. Trade liberalization is expected to make the Japanese economy more dependent upon food imports and, thus, more susceptible to these risks. Using a computable general equilibrium model with a Monte Carlo simulation, we quantify the welfare impacts of productivity shocks and export quotas by major rice exporters to Japan and found little evidence of Japan suffering from such shocks.     

Authorized variance analysis with consumption rate

On the base of budget or plan information, comparing with actual results, making variance analysis, finding real reasons behind variance, this is important way of control and also important function of budget. However, without consideration of changes of environment, there are some limitations for static variance analysis with benchmark of plan data. Adjusting for benchmark according to actual condition, then doing variance analysis, these will improve utilization of variance analysis. Adjusted benchmark is often known as authorized cost/profit. For different understanding for authority concept, with RCA＇s （the abbreviation for Resource Consumption Accounting） view and numerical examples, this paper brings out the concept of consumption rate variance to promoting deeper understanding and analyzing reasons behind variance.     

儒家义利观与马克思主义义利观之比较

儒家义利观与马克思主义义利观形成、发展的条件迥然不同,它们有明显的分歧和冲突。但同时它们都是人类智慧的结晶,因而又有共通之处。本文试图对儒家义利观与马克思主义义利观进行分析、比较,批判地继承儒家义利观的精华,为建立既具有民族特色,又符合时代精神的科学义利观服务。     

基于计算机仿真的仓库与停车场布局方案评价

首先明确了系统的研究对象及设施布局方案,提出了评价指标体系。通过基于布局方案的系统状态变化流程图的分析和状态变化间隔时间的确定,建立了仓库与停车场作业系统仿真模型。运用离散系统仿真技术中事件调度法提出了实现系统状态变化的基本步骤,并通过状态变化间隔时间设置、布局方案设置、仿真演示三个模块完成了仿真模型的程序实现。最后运用仿真模型得出了布局方案中装卸月台、车辆、停车场等相关指标,并分析评价了方案的优劣性。