高校办学效益的一种计算方法探讨

依据投入产出比方法 ,将高校的投入与产出指标进行量化 ,提出了一种实用的高校办学效益评价方法     

试论反馈电路的判别方法

本文通过引入输入端电极、输出端电极的概念,就反馈电路的判别提出了几点方法和注意事项。使反馈电路的判别更容易。     

Krashen的“输入”理论对英语新闻听力教学的启示

英语新闻听力是英语专业学生学习的一个薄弱环节。研究K rashen的语言输入理论,对开展英语新闻听力教学有很大的启示。     

螺旋天线宽带阻抗匹配技术的研究

介绍了一种用渐变镜像传输线阻抗变换器来实现螺旋天线与50Ω馈线之间的宽带匹配技术.实验结果表明,采用渐变镜像传输线阻抗变换器能在2:1的频带范围内实现 ρ<2.     

CAD在位置量规设计中的应用

本文介绍了位置量规设计原理及计算公式，陈述了位置量计算机辅助设计系统的总体设计及软、硬件构成，同时介绍了为加快绘图速度对图形输入板菜单进行重新编制的方法。     

“双碳”治理视角下碳捕集、利用与封存政策的中国样本审视

探究中国现行碳捕集、利用与封存政策的特征与不足,可为我国将来的政策制定及体系优化提供参考。以2006年2月至2022年12月中央和地方发布的143份有效政策文本为研究对象,构建基于“政策工具-目标领域-政策主体”的三维分析框架模型。结合统计学方法、结构分析法和内容分析法等研究方法,分别探究了碳捕集、利用与封存政策的演进历程、政策工具、政策目标领域、政策主体、政策力度等内容特征。结果表明,在“双碳”目标导向下,中国碳捕集、利用与封存政策正在展开布局,战略目标逐步明晰,但仍然存在专项政策缺位、政策工具结构分布不均衡、政策主体合作联系密度不高、碳捕集、利用与封存全流程技术标准不完善等问题。基于此,未来应当强化政策力度,构建面向碳中和目标的碳捕集、利用与封存专项政策;高效配置多元政策工具,构建政策工具的综合应用模式;完善碳捕集、利用与封存产业链,优化产业布局结构。     

On the Choice of Functional Forms: Summary of a Monte Carlo Experiment

The use of flexible functional forms is a standard practice in applied econometrics. Many flexible forms have been proposed. In this study, we investigate the behavior of three of them—the translog, the symmetric McFadden, and the symmetric generalized Barnett. Based on Monte Carlo experiments, we assess the ability of these forms to test theoretical properties and to measure technological characteristics.     

Modeling service-time distributions for queueing network simulation

Shapes of service-time distributions in queueing network models have a great impact on the distribution of system response-times. It is essential for the analysis of response-time distribution that the modeled service-time distributions have the correct shape. Tradionally modeling of service-time distributions is based on a parametric approach by assuming a specific distribution and estimating its parameters. We introduce an alternative approach based on the principles of exploratory data analysis and nonparametric data modeling. The proposed method applies nonlinear data transformation and resistant curve fitting. The method can be used in cases, where the available data is a complete sample, a histogram, or the mean and a set of 5-10 quantiles. The reported results indicate that the proposed method is able to approximate the distribution of measured service times so that accurate estimates for quantiles of the response-time distribution are obtained     

The existence of waiting time moments for single server queues with mixed renewal and poisson inputs

The following queuing system is considered: Two independent recurrent input streams (streams 1 and 2) arrive at a server. It is assumed that stream 1 is of Poisson type. Three priority disciplines are studied in case that customers of type 1 have priority: head-of-the-line, preemptive-resume, and preemptive-repeat discipline. For all three cases, the limiting distribution function of actual waiting times of low-priority customers is considered, and conditions are given for the existence of moments related to these limiting distributions.     

保险公司投入要素产出贡献率研究

基于柯布-道格拉斯生产函数,构建保险公司投入要素产出贡献率计算模型,采用中国90家保险公司2008—2015年面板数据进行实证研究。结果表明：第一,资本投入对保险公司产出贡献率最高,创新次之,最后为劳动投入;第二,不同规模保险公司的投入要素产出贡献率存在明显差异。为此,在供给侧改革背景下保险公司应注重优化投入要素结构,以促进保险业的健康与稳定发展。