关于经济生产批量模型在图书重印决策中的研究与应用

一出版面临的日益严峻的库存问题 随着出版社的不断发展，其库存规模也越来越大，当然这也是我旧出版界普遍存在的问题。近3年来我国图怕出版、销僻与库存情况见表1。

考虑模糊转移时间且允许缺货的缺陷生产模型

考虑到生产设备的不可靠,研究了含模糊生产故障时间且允许缺货的EPQ模型,建立了含缺货成本和模糊生产故障时间的费用模型,揭示了费用函数的性质。基于此,设计了最优生产策略的二分法求解过程。结合算例分析了重修费用和缺陷产品比例对最优生产策略的影响。结果表明:随着重修费用和缺陷率的增大,最优生产时间越短,最优成本越大。

交通基础设施、空间溢出与全要素生产率——基于丝绸之路经济带面板数据的空间计量分析

本文立足于多种经济增长理论,以"丝绸之路经济带"沿线14省为研究对象,选取多维要素的空间面板数据,在经济、地理与邻接三种空间权重下通过构建空间杜宾模型估计交通基础设施与相关控制变量对区域全要素生产率的作用机理及空间溢出效应。结果表明:2000~2015年丝绸之路经济带沿线省份整体交通运输能力对区域全要素生产率正向溢出效果明显,铁路与高级公路密度次之,交通基础设施投资效果不佳。除此之外,交通基础设施直接效应远大于间接效应,对本区域全要素生产率的提高促进作用明显。最后从研究样本整体和个体角度有针对性地提出促进丝绸之路经济带全要素生产率持续增长的对策。

基于零库存的最小生产批量研究

在当今市场条件下 ,很多企业采用柔性制造系统 ,实行无库存生产方式 ,追求生产批量尽可能小。但研究表明对于某一特定企业 ,在生产能力和准备时间给定的情况下 ,要完成所要求的产出水平 ,存在某一不能再降低的生产批量 ,即最小生产批量。研究了无库存生产方式下 ,单品种和多品种两种状态的最小生产批量 。

末期矿山残矿开采工作的实践

针对玉石洼铁矿在近30年开采过程中有底柱开采的残留矿体、无底柱开采因采准系统破坏而损失的矿石及以前由于设定的边界品位高(25%)没有回收、现在市场条件可以回收的矿体,设计并实践了适应不同残矿条件的采矿方法,使资源得到了较好利用。

Remodeling of the Macedonian Economy

The Macedonian economy gets out relatively little hurt by the global economic crisis not facing with financial crisis, the recession was short-lived, and social crisis emerged in modest sizes. However, the global crisis revealed the major weaknesses of the economic model which was implemented. It turned out that the Macedonian economy is very dependent on the performance of only a few sectors and movements on the prices of its most important export and import products, and that the scope of supply and demand for domestic goods and services is small. These lectures from the economic crisis posed by the need to create a new model for country economic development in the future. The application of historical, statistical, analytical and comparative method shows that Macedonia should exercise other holistic approach in the remodeling of their economy. This means that, besides keeping macroeconomic and financial policy in the future the Macedonian government should act more vigorously in the direction of creating new jobs and provide greater social security. The economic model that we propose in this paper recommends it be done by encouraging small and medium enterprises, diversification of production, encouraging domestic investments, developing human capital, improving infrastructure, encouraging exports and harmonization the macroeconomic instruments. The application of this model will result in increasing investments, industrial production and exports, increasing the competitiveness of domestic products, reducing the trade deficit and maintaining the macroeconomic stability. The general conclusion of the paper is that application of the proposed economic model should lead to realization of two most important goals： achieving lasting, sustainable and significantly higher rates of economic growth and reducing the high rate of unemployment in the country.

Labour Productivity and the Chaotic Economic Growth Model： G7

Chaos theory is used to prove that erratic and chaotic fluctuations can indeed arise in completely deterministic models. Chaos theory reveals structure in aperiodic, dynamic systems. The number of nonlinear business cycle models use chaos theory to explain complex motion of the economy. Almost three years after the crisis, the G7 countries continue to be challenged with economic volatility. The global economy has slowed. Growth in the United States has weakened. In Europe, economic instability is generated by the financial and economic imbalances. Europe is gripped with financial strains from the sovereign debt crisis in the euro area periphery. How these G7 economies confront their fiscal challenges will profoundly affect their economic stability. The basic aim of this paper is to provide a relatively simple chaotic economic growth model that is capable of generating stable equilibria, cycles, or chaos. This paper looks in more detail at the GDP growth stability issues in each of the G7 countries in the period 1990-2012 （Retrieved from http：//www, imf.org）. A key hypothesis of this work is based on the idea that the coefficient π =[p（s_p-i-n/pb-p_mb_m）] plays a crucial role in explaining local stability of the gross domestic product growth, where, p---the coefficient of labour productivity; p.,--the coefficient of the marginal labour productivity, sp-private saving rate;i--investment rate; b-percent of the gross domestic product which belongs to budget deficit; bm-marginal budget deficit coefficient; n-net capital outflow rate.

COAL QUALITY CONTROL

Coal storing and loading have much more influence on coal quality. In the paper, a goal programming model has been constructed to determine the ideal quantity extracting from stockpile and silos and a quality control model is inferred under the guidance of maximum theory of dispersed number and practice methods are given to meet production demand, with which a coal mine has achieved a better tech-economic result.

A Model Fitting Approach to Depict the Global Textile Trade

Since the mercantilism era, economists have built up trade theories to explain the rationale and patterns of world trade.In this paper, the explanatory power of the international product life cycle (IPLC) theory for describing the trends and patterns of the global textile trade, one of the most geographically dispersed export items in both developed and developing countries/regions, is discussed. Data at SITC two-digit level (SITC 65 ) were collected and time series regressions were performed to analyze the value trends and world shares of textile exports from 1990 to 2000 for selected developed economies. It was found that some developed economies have increased their world shares in textile exports, which indicated that global trade shift in the textile industry may not follow what the IPLC has suggested.

Economic Evaluation of Grain Amaranth Production in Kamuli District, Uganda

In Uganda, grain amaranth is relatively new and has generally not been considered as an important crop compared to other grain crops and legumes. This study was therefore conducted to determine factors affecting adoption of grain amaranth growing, factors affecting production, and economic returns on investment of its production. The study was carried out in Kamuli district where a total of 174 grain amaranth farmers and 90 non-grain amaranth farmers were randomly selected and interviewed. Using descriptive statistics, regression analysis （logit model and a Cobb-Douglas type production function） and profitability ratios, it was found that grain amaranth is produced on a small scale and yields are low. Farmer adoption of the crop was favoured by age, gender （female）, education of the farmer, and source of income. The output was positively affected by the amount of labour and manure used in production, while a negative relationship existed between output and male farmers. The crop was most viable under small acreages （0.02-0.04 ha） with positive returns to investment of 0.016. Its production should therefore be encouraged because of its income generation potential and since it requires small land.

Effect of Socio-Economic Variables on Fish Production of Small Farmers in Tocantins State, Brazil

Fish farming is a strategic activity for both the economy and food security of the Tocantins state. Nowadays, there are about eighty small fish farmers in the region of Divin6polis in Tocantins state. The technological level of fish farmers is low and it was found that only 30% of farmers could ever get to the point of selling fish. Therefore, the objective of this paper is to investigate which socioeconomic factors have influence on the fact of fish farmers in the region of Divin6polis and in Tocantins state reach a level of efficiency in production enough that the fish can be good for sale in the local market. To estimate this relation the logit model was chosen, with methodology based on the empirical model used in Musaba and Namukwambi. Following the production of fish farms in the Western of Tocantins state, the collect of the data, during 2012, were conduct with interviews of 30 fish farms, visiting them in their homes and applying a questionnaire. Through the use of econometric models of probability for limited dependent variables, it was found that factors such as participation in federal programs to transfer income, total area of water and production in ponds are key factors in determining the likelihood of producer to sell fish.

Economic Consequences of Gender Equality in Europe

This paper shows influence of gender equality on economy where it analyzed how gender equality in Europe has affected on the development of the frozen food industry and services related to childcare. The development of these industries has given a positive impulse to the development of the whole economy. In this analysis, it is used multiple regressions as one of the most important statistical methods. In the first part of this paper, it shows the connection among the growth of female employment, growth in frozen food expenditure and growth of GDP in United Kingdom. In the second part of paper, it shows the relationship among the growth of labor force participation of women, growth of number of kindergarten and growth of GDP in Hungary. To proof these relationships, it used a multiple regression model. This statistical model was tested by using the T schedule which showed that the model in both the analyses is correct. At the end of the paper, it presents that employment rate and GDP behaves in the same way in European Union. These analyses show that it is necessary to continue to strengthen gender equality if the policy makers want to achieve even greater economic growth. The issue of gender equality is a very important factor in creating employment policy, and statisticians should be more involved in process of employment policy and gender equality