行列式性质的运用

本文运用多项式方程根的理论和行列式性质巧妙计算行列式，同时给出范德蒙行列式的简化计算方法，并举例说明了行列式性质在解方程中的应用。     

浅谈高职教学中常用的几种行列式求法

从n阶行列式的特点出发,举例探讨了行列式的主要计算方法。综合利用所给解法,基本上可解决一般n阶行列式的计算问题。     

关于方阵行列式的性质

文章介绍了线性代数中常用的几个方阵行列式的性质,并对一些性质给出了证明,另给出了几个实例介绍如何应用这些性质计算抽象行列式。     

创新性线性代数课程的教学探究

针对线性代数教学现状,构建了以线性方程组为主线的、各章节紧密相关的创新性理论体系,并以行列式为案例,讲述了行列式的产生的知识背景、行列式的性质的几何解释,并以前后呼应的方式导出了Cramer法则,并把计算机软引入到实例分析当中,整个章节融合了创新思维和创新能力的培养,遵从了从理论到实践再到理论辩证规律。     

会计信息化辅助生产核算模型创意

在开发商品化成本核算系统中,由于缺乏相关信息资料,研制处理多元的行列式系统模块有一定难度。本文以开发研究成果为基础,探索运算N元行列式设计方法。     

为高职院校学生介绍的行列式计算方法

本文根据高职学生的高数基础及需要,通过具体实例介绍了行列式计算的几种方法。     

讨论矩阵的特征值与行列式的关系

利用矩阵的特征值解决行列式的问题。     

关于Lucas数的一类行列式的计算

研究了一类由Lucas数组成的特殊行列式D(nm,k,l)的计算问题,并给出了一个有趣的恒等式。     

矩阵与线性方程组的解

本文分析和阐明了高等代数中用矩阵解线性方程组的问题,同时也简单地概括总结了n阶行列式的计算方法。     

魔术表演中的线性代数教学

笔者在一期电视节目中看到著名魔术大师刘谦的表演,发现与《线性代数》中行列式有定义有类似的地方。本文用数学知识解释刘谦魔术表演的理论基础。同时,指出该魔术在课堂教学中应用,既能激发学生的学习兴趣,又能提高学生对行列式定义的掌握能力。     

A Comparative Study of Health Promotion Networks: Configurations of determinants for network effectiveness

Collaborative public networks have become increasingly important as policy tools to address complex social and health problems. However, despite the broad literature on network effectiveness, there is still insufficient insight into the different determinants of whole network effectiveness, and particularly on how these determinants are related. Based on an empirical comparison of 13 mature networks, this study identified potential environment, structural, and management determinants. Moreover, configurations of the identified determinants leading to network effectiveness were generated using configurational comparative methods. We gained insights into how configurations of determinants impacted network effectiveness and found a dominance of structural and managerial determinants.     

Structural Decomposition Analyses with Dependent Determinants

Structural decomposition techniques are used to break down the changes in one variable into the changes in its determinants. Typically, these determinants are assumed to be independent. Using the decomposition of value added growth as a prototype example, this paper examines the phenomenon that several of the determinants are not independent. The determinants are termed fully dependent if changes in one determinant cannot occur without corresponding changes in another determinant. In most empirical cases, full dependence exists between groups of determinants, not between separate determinants. It is indicated that dependencies may cause a bias in the results of decomposition analyses. An alternative to overcome this problem is proposed and the findings are illustrated by an empirical study for The Netherlands 1972-1986.     

Technological proximity and the choice of cooperation partner

This paper provides empirical tests of hypotheses of cooperative behavior provided by evolutionary approaches in the resource-based view of the firm. The influences of “technological proximity”, individual incentives to cooperate and managerial tools to the choice of research partner are analyzed. Using German patent data we can show the positive influence of those three determinants. The results of this paper confirm theories dealing with the path-dependency of research activities.      

The construction of a composite index for general satisfaction in Turkey and the investigation of its determinants

The goal of public enterprises is to increase the wealth and happiness of individuals. This target lets them make the investment to fulfill these expectations. However, not all citizens in a country might have the same opportunities. This case requires comparing citizens who live in cities with regard to satisfaction levels. This study consists of two stages. In the first stage, a composite index called the General Satisfaction Index (GSI), which aims to explain the satisfaction levels of citizens living in cities, is obtained by using the Benefit of the Doubt method. Contrary to the previous studies, the satisfaction indicators based on the emotions and senses of citizens are used to construct a composite index. Satisfaction indicators’ contribution to GSI is ensured using the minimum weights. In the second stage of this study, socioeconomic determinants of GSI are investigated in both countrywide and regions by using regularized regression methods. In the result of the regression analyze, it is confirmed that there are different socioeconomic determinants of satisfaction levels for countrywide and each region. For this reason, it is proposed that policymakers should follow different politicizes in each region to increase the satisfaction levels of citizens in the country.     

武汉旅游业竞争力提升的现实基础与对策

21世纪的四大朝阳产业之一旅游业已成为我国经济新的增长点。武汉是一个旅游资源大市,但旅游发展尚处于起步阶段。如何挖掘武汉旅游发展潜力,发挥旅游竞争力优势,是当前武汉急需思考和解决的问题。文中选择了迈克尔·波特的钻石模型,根据武汉旅游业的现状,从生产要素、市场需求、相关与支持产业、同业竞争四个方面对武汉旅游业竞争力进行了分析。在此基础上提出了提升武汉旅游业核心竞争力的建议。     

How far can a dummy go? or,Are we putting too much of a burden upon political dichotomies?

Previous political models of macroeconomic phenomena have been erroneous due to the interpretations researchers have attached to the political dichotomies specified in their models. It is claimed that direct stimuli interpretations of political nominal scaling misrepresent the true nature of the impact political determinants exert upon macroeconomic endogenous outcomes. Furthermore, it is suggested that a proper specification of an economic phenomenon requires the consideration of both political and economic information. The consideration of political content, given its expectational nature, somewhat bridges the gap between substantive global rationality and procedural bounded rationality theories in economics and political science (as well as cognitive psychology). When a fuller specification is brought to bear, economic determinants play a mixed role in macroeconomic modeling. Such determinants are subject to direct stimuli and expectational information. On the other hand political determinants exert a pure expectational impact upon endogenous economic determinants.     

我国预算执行中超收超支的形成机制及治理

近几年,我国预算执行中的超收和超支问题随着超收规模和超支规模的扩大而引起广泛关注.国内学者对于超收的形成原因进行了诸多探讨,普遍认为超收是超支的决定因素.理论研究和实证研究超收和超支形成机制的结果显示:虽然超收是超支最初产生的直接原因,但是地方政府支出需求的刚性和对资金自由裁量权的追求形成了对超收的“倒逼机制”,尤其是1994年分税制改革后地方财力与事权不匹配所产生的支出缺口,使得地方政府逐渐对财政超收产生了路径依赖.解决超收和超支问题最根本的措施是防止超收与超支的直接转化.此外,如何加强预算约束,从技术、行政和法制层面控制超收规模也是下一步改革中需要关注的问题.     

基于商品品类的网络购买决策关键影响因素研究

网络消费行为的研究成果众多,但影响消费者网络购买决策的关键因素仍不明确。本文从商品品类视角来研究消费者网络购买决策的关键影响因素。首先根据消费行为理论和前人相关研究成果构建了本文的研究假设模型,然后利用基于淘宝网和问卷星调研平台的全国性调查数据进行相关性分析和回归分析。通过对logit模型的分析,验证了假设模型,得到了在线商品网络购买决策关键影响因素,且发现针对不同商品品类其影响因素存在着差异性。     

Analysis of the Vocational and Residential Preferences of a Rural Population: Application of an Experimental Technique to Rural Slovenia

Abstract

This study applies choice experiments to the analysis of the relative importance of both monetary and non-monetary determinants of vocational choice and spatial labour supply. It identifies the determinants of individuals’ choice of jobs and places of residence, and provides a better understanding of how rural labour adjustments might be managed in a country in transition. The results indicate that while wages are the most important factor influencing employment choice, other determinants affecting working conditions and residence do have a counterbalancing impact on choice. Results suggest that sample respondents do appear to be relatively immobile between sectors and also in terms of migration and commuting. However, our results do identify a range of non-wage determinants that might be used to stimulate mobility.     

Machine learning model for Bitcoin exchange rate prediction using economic and technology determinants

In recent years, Bitcoin exchange rate prediction has attracted the interest of researchers and investors. Some studies have used traditional statistical and econometric methods to understand the economic and technology determinants of Bitcoin, few have considered the development of predictive models using these determinants. In this study, we developed a two-stage approach for exploring whether the information hidden in economic and technology determinants can accurately predict the Bitcoin exchange rate. In the first stage, two nonlinear feature selection methods comprising an artificial neural network and random forest are used to reduce the subset of potential predictors by measuring the importance of economic and technology factors. In the second stage, the potential predictors are integrated into long short-term memory (LSTM) to predict the Bitcoin exchange rate regardless of the previous exchange rate. Our results showed that by using the economic and technology determinants, LSTM could achieve better predictive performance than the autoregressive integrated moving average, support vector regression, adaptive network fuzzy inference system, and LSTM methods, which all use the previous exchange rate. Thus, information obtained from economic and technology determinants is more important for predicting the Bitcoin exchange rate than the previous exchange rate.