Staples,links, and poles in the construction of regional development theories

The developmental trajectories of extractive economies differ systematically from those of industrial economies. Analysis of these differences is difficult, because the specific characteristics and location in space of particular extracted resources distinguish extractive economies from each other far more than commodities produced and location distinguish industrial economies. The peculiar distoritions of Harold Innis's studies of particular staples as these were incorporated into general statements about regional economic development illustrate some of the tensions between ideographic and nomothetic goals in the analysis of regional economies and the dangers of resolving these tensions by collapsing the particular into the general. Subsequent use of these regional economic development models to obscure problems of particular resource extractive projects illuminates some of the unintended practical consequences of theoretical errors.     

论矿难的国家赔偿责任

自2004年末以来,我国重特大煤矿安全事故频发,引起了社会各界对矿难的广泛关注。其中矿难赔偿系焦点问题之一,但综观相关研讨,大都仅限于煤矿企业的赔偿,国家赔偿则几无涉及。而矿难国家赔偿责任的确立,无论在理论上还是实践中均有其积极之意义。基于国家赔偿责任在本质上是一种特殊的民事责任,故在认定和实现的过程中不能仅仅依据《国家赔偿法》,亦理应遵循相关的民事法律规定。     

农村矿业用地用途管制探析

土地具有经济属性和社会属性,农村耕地转变用途后能获取超额增值收益,市场的局限性在于发挥土地经济属性的同时抑制社会属性。市场失灵为政府管制定位,政府通过严格的用途管制弥补市场不足。土地发展权是由人与土地关系而引起的人与人之间的社会关系,权利行使的社会化要求土地发展权主体承担社会性义务。由土地利用总体规划及年度计划配置土地发展权,政府通过矿业市场准入制度审查矿业用地的合法性。强制性用途管制依赖法制的约束力和执行力。     

Flexible regression modeling

The author proposes a new method for flexible regression modeling of multi‐dimensional data, where the regression function is approximated by a linear combination of logistic basis functions. The method is adaptive, selecting simple or more complex models as appropriate. The number, location, and (to some extent) shape of the basis functions are automatically determined from the data. The method is also affine invariant, so accuracy of the fit is not affected by rotation or scaling of the covariates. Squared error and absolute error criteria are both available for estimation. The latter provides a robust estimator of the conditional median function. Computation is relatively fast, particularly for large data sets, so the method is well suited for data mining applications.     

关联规则在学生成绩分析中的应用

采用关联规则的apriori算法，对医科大学学生四年中各门课程的成绩进行分析，从而发现课程之间的联系和基础课程对专业课程的影响，为教务部门安排课程提供参考。     

国外矿区土地复垦执行保证金制度的比较研究

采用文献调研法 ,以美国、加拿大、澳大利亚、马来群岛和印度尼西亚的矿区复垦执行保证金制度为研究对象 ,对比分析了这些国家矿区复垦执行保证金制度的配套制度和核心内容 ,进而分析总结出其共同特征 ,为我国改革矿区复垦制度 ,建立复垦执行保证金制度提供借鉴。     

基于Web挖掘的数字图书馆个性化技术探究

通过对Web挖掘技术的分析和研究,介绍了Web挖掘在数字图书馆中的应用,提出基于Web内容挖掘、Web结构挖掘、Web使用挖掘的数字图书馆个性化服务体系.     

In-Sample or Out-of-Sample Tests of Predictability: Which One Should We Use?

It is widely known that significant in-sample evidence of predictability does not guarantee significant out-of-sample predictability. This is often interpreted as an indication that in-sample evidence is likely to be spurious and should be discounted. In this paper, we question this interpretation. Our analysis shows that neither data mining nor dynamic misspecification of the model under the null nor unmodelled structural change under the null are plausible explanations of the observed tendency of in-sample tests to reject the no-predictability null more often than out-of-sample tests. We provide an alternative explanation based on the higher power of in-sample tests of predictability in many situations. We conclude that results of in-sample tests of predictability will typically be more credible than results of out-of-sample tests.     

采矿专业人才培养中产学研合作教育模式的探索

根据国内外产学研合作教育的发展现状 ,阐述了采矿工程学科开展产学研合作教育的必要性和重要意义。提出了进一步完善和发展采矿工程学科产学研合作教育的措施及模式 ,对促进采矿专业人才培养质量的提高具有重要的指导意义     

耗散结构视角下的矿业城市产业转型路径

针对矿业城市产业结构现状,以耗散结构理论为依据,对政府政策、投资环境、中小企业、技术创新、人才培训等环节在产业转型中的作用进行了分析,阐述了产业耗散结构的形成机制。