矿床地质特征及经济模型法在铜镍矿预测中的应用

随着我国的经济迅速发展,对资源能源的需求也在进一步加大,加强各类矿藏资源的开采满足人们的实际需要就显得比较重要。铜镍矿作为重要的应用资源,对其进行开采就要在预测基础上进行,保障准确找到铜镍矿资源。本文主要就铜镍矿矿床地质特征和成矿的过程详细分析,然后对经济模型法在铜镍矿预测中的应用理论和具体应用进行探究,希望能通过此次理论研究,有助于铜镍矿通过经济模型法得到准确预测。

矿床地质经济模型法在铜镍矿预测中的应用

以我国的铜镍硫化物矿床成矿规律进行系统的研究,在研究的基础上对矿床地质经济模型法在铜镍矿预测中的应用进行阐述,分析在工作中产生问题的原因。

生物资产价值评估特殊方法研究——生物经济模型法

生物资产具有生命,其价值随着生长、蜕化、生产、繁殖不断变化,针对生物资产这种特殊性,本文遵循生物资产生长发育规律及价值变动规律,引用Von Bertalanffy生长方程,建立生物经济模型。为生物资产价值评估提供一种新思路。

人口迁移预测的研究方法综述

当前中国人口迁移现象的变化,引起了学术界对人口迁移问题的重视。众多学者对人口迁移问题进行了大量研究,研究方法向多样化发展。研究方法的迅速拓展,促进了人口迁移研究的发展。对人口迁移预测研究中经常使用的数学方法、队列预测法、多区域矩阵法和社会经济模型法等研究方法进行了概括分析。

企业库存成本优化研究——以北京东华服装公司为例

现如今,随着新产业的不断发展和各行各业的不断进步,备品备件的合理库存成为企业正常运行的基本保证,而市场经济的快速发展使得企业面临的竞争越来越激烈,库存成本占北京东华服装公司经营成本的很大比重,因此北京东华服装公司的库存优化问题亟待解决。文章结合所学的相关知识,对北京东华服装公司库存成本的影响因素进行分析,并运用ABC分类法提出库存管理方面成本高的因素及产生原因,构建ABC分类法和经济订货批量(EOQ)模型法降低企业的库存成本,从而使得企业的库存成本降到合理水平。最后对其库存成本优化的实施提出有针对性的建议和措施。

城市经济承载力测算研究

将城市的经济承载力简要地定义为在不同时间尺度上,在经济社会可持续发展的条件下,对乌鲁木齐市辖区的经济发展水平所能承载的人口数量。用人口-经济承载力模型法、就业人口承载力模型法等城市经济承载力的测算方法在乌鲁木齐市进行具体应用,进而测算出乌鲁木齐市的城市经济承载力和潜在城市经济承载力。

城市经济承载力及其测算方法研究——以沈阳市为例

将城市经济承载力简要地定义为在不同时间尺度上,在经济社会可持续发展的条件下,某城市辖区的经济发展水平所能承载的人口数量。对人口—经济承载力模型法、就业人口承载力模型法、国民财富测算法等城市经济承载力的测算方法进行了具体评析,并在此基础上测算了沈阳市的城市经济承载力。

The applying of BP network in forecasting the demand and its growth rate for coal

Based on the statistical data from 1975 to 1997, we forecast the growth rate of coal consuming and the quantity in coming decade with the BP neuron network in the article.

Cost of treating chronic hepatitis B:Comparison of current treatment guidelines

AIM:To compare program costs of chronic hepatitis B(CHB) screening and treatment using Australian and other published CHB treatment guidelines.METHODS:Economic modeling demonstrated that in Australia a strategy of hepatocellular cancer(HCC) prevention in patients with CHB is more cost-effective than current standard care,or HCC screening.Based upon this model,we developed the B positive program to optimize CHB management of Australians born in countries of high CHB prevalence.We estimated CHB program costs using the B positive program algorithm and compared them to estimated costs of using the CHB treatment guidelines published by the AsianPacific,American and European Associations for the Study of Liver Disease(APASL,AASLD,EASL) and those suggested by an independent United States hepatology panel.We used a Markov model that factored in the costs of CHB screening and treatment,individualized by viral load and alanine aminotransferase levels,and calculated the relative costs of program components.Costs were discounted by 5% and calculated in Australian dollars(AUD).RESULTS:Using the B positive algorithm,total program costs amount to 13 979 224 AUD,or 9634 AUD per patient.The least costly strategy is based upon using the AASLD guidelines,which would cost 34% less than our B positive algorithm.Using the EASL and the United States Expert Group guidelines would increase program costs by 46%.The largest expenditure relates to the cost of drug treatment(66.9% of total program costs).The contribution of CHB surveillance(20.2%) and HCC screening and surveillance(6.6%) is small-and together they represent only approximately a quarter of the total program costs.CONCLUSION:The significant cost variations in CHB screening and treatment using different guidelines are relevant for clinicians and policy makers involved in designing population-based disease control programs.

Strategic Focus and Business Model Organization： The Mean Field Analysis Approach

The objective of this research is to show a new methodology for modeling phenomena present in complex economic systems. The case study we analyzed is the adoption of open organization model among firms operating in a particular industry. A firm with an open system model creates and captures value taking advantage not only from the internal resource but also from external. The organization could approach to open model acquisition using different focus： external focus namely looking out of its boundary, acting and reacting to competitor innovation, costumers＇ changing, demand growth, or internal focus remaining inside its boundary improving its best capabilities ignoring what happened outside （Vagnani, Moran, ＆ Simoni, 2010）. The actors involved are firms, customers and suppliers linked together through a business to business model. The methodology is based on an Object-Oriented Analysis Field Model that allows to intuitively describe systems characterized by a large number of objects that interact, as in this case of a system composed by different organizational entities. The system simulation allows to analyze how the actors influence the acquisition and diffusion of the open organization model. This approach permits the generation of different classes of objects to represent all actors involved in the evolution of the system and to define the dynamics that determine their interaction. The solution of the model can be approximated using the Mean-Field analysis technique （Kurtz, 1978）, following the results proposed in Bobbio, Gribaudo, and Yelek （2008）. A qualitative result is illustrated in order to show the applicability of the proposed methodology and to emphasize its relevant features： flexible modeling approach, capacity of solving complex systems and output management facilities. The presented model is comprehensive and its scope is wide; it could be used to study the behavior of enterprises changing model in many different scenarios and situations. In future works quantitative results will be given, and different situations will be analyzed.

The Establishment of Measurement Model and Implementation Strategy for Service Productivity

As a key factor of economic growth, productivity has been valued in the academic community. Today, with the rapid development of service industry, the research for service productivity has also attracted wide attention. However, in the service industry, because of its own characteristics and properties, measurement of service productivity could not apply for the traditional productivity measurement methods simply. This research first has put out the constitution model of service productivity, and thus put out the measurement model of service productivity. And explains that service productivity is a function which contains internal efficiency, external efficiency, and capacity efficiency. In service productivity, external efficiency is the key one, internal efficie and capacity efficiency should also be given considerations. Eventually, the strategy of implementing measurement of service productivity have been proposed ncy the

基于演化弹性理论的中国老工业城市经济转型过程比较

运用演化弹性理论(evolutionary resilience)采用经济周期模型法和偏离—份额法,从增长和结构两个方面,比较分析沈阳市、重庆市和武汉市3个典型老工业城市改革开放以来经济发展和转型过程。结果发现:(1)重庆市和武汉市经济增长能力水平具有显著地以20世纪90年代中期为分界的阶段性特征;沈阳市经济发展过程呈现出适应循环周期特征,目前处于由维持向释放过渡的阶段。(2)20世纪90年代以来,沈阳市3次产业结构转换方向具有较大的波动性,第三产业份额的增加主要是第二产业增长放慢的结果。重庆市和武汉市3次产业结构转换方向具有较强的稳定性。(3)20世纪90年代末以后,沈阳市和武汉市制造业结构演替受老路径增长能力变化影响较大,重庆市制造业结构演替是在新老路径都保持较高增长能力背景下稳步推进的。(4)21世纪初以来,沈阳市新路径的演化呈现出低端化特征,而重庆市和武汉市新路径的演化呈现出高端化特征。本文将弹性理论应用到城市经济转型研究,实证了弹性理论的实践应用价值。