赣北早熟梨有效酸与近红外光谱的相关性研究

通过分析赣北早熟梨有效酸含量与近红外光谱的相关性,试图采用近红外光谱技术对赣北早熟梨有效酸进行无损检测,建立赣北早熟梨有效酸含量和光谱的数学模型。结果表明：利用近红外光谱分析预测赣北早熟梨有效酸含量的方法理想。     

改革民航管理体制创新客货经营机制

科学发展观的第一要义是发展。如何按照科学发展观的要求,改革民航管理体制,创新机场经营机制,突破客货经营瓶颈,实现盐城民航又好又快发展,是一个十分现实而又迫切需要解决的问题。     

Hölder properties of local times for fractional Brownian motions

We study the local times of fractional Brownian motions for all temporal dimensions, N, spatial dimensions d and Hurst parameters H for which local times exist. We establish a Hölder continuity result that is a refinement of Xiao (Probab Th Rel Fields 109:129–157, 1997). Our approach is an adaptation of the more general attack of Xiao (Probab Th Rel Fields 109:129–157, 1997) using ideas of Baraka and Mountford (1997, to appear), the principal result of this latter paper is contained in this article.     

河南承接国际国内产业转移的对策研究

目前国际产业转移和我国东部地区产业向中西部转移的进程进一步加快,河南要抓住历史新机遇,在承接产业转移中实现科学发展。一是审时度势,把握承接产业转移的战略和策略;二是发挥比较优势,因地制宜承接国际国内产业转移;三是扩大开放领域,提升产业转移的层次;四是拓展融资渠道,创新融资方式;五是加强开发园区和产业集群建设,发挥增长极的辐射带动力;六是加强组织协调与政策引导,切实改善投资环境。     

资源型城市生态承载力基本问题探究

资源型城市面临着经济转型与生态承载力衰弱的双重压力,基于生态承载力视角探索资源型城市可持续发展模式成为了资源型城市重要的战略方向.文章以资源环境承载能力、生态系统弹性力及生态承载压力度等分析框架,对资源型城市生态承载力进行了分析与研究,指出资源型城市的发展应合理克服城市资源环境承载力放大效应,充分注重生态系统生命周期及其弹性力规律,极力避免城市资源环境开发的负面效应.     

“中等收入陷阱”风险规避研究:人力资本的视角

结合"中等收入陷阱"的研究现状,分析了目前我国劳动力数量、质量与结构变化带来的潜在"中等收入陷阱"风险。通过剖析人力资本的知识效应、外部效应以及国外的人力资本投资经验,从教育投入、技能培训和健康资本投入三个方面,提出了规避"中等收入陷阱"风险的人力资本投资策略。     

资水流域及各分区面雨量及雨季特点分析

利用高分辨率再分析降水资料(中国区域地面气象要素数据集),运用格点平均值法求得资水流域及各分区1979-2018年逐日面雨量,并对资水流域面雨量进行统计分析和线性趋势分析.结果表明,资水流域全区年面雨量变化趋势呈现缓慢增加的特征,其中柘溪库区和资水下游面雨量呈现增加趋势,罗家庙以上和罗冷区间面雨量呈现减少趋势.资水全区...     

The earnings effects of health and health-related activities: a panel data approach

We investigate the effects of health and health-related habits on earnings in China using panel data to control for unobserved heterogeneity related to individual traits and job characteristics. Health-related habits include smoking cigarettes, drinking tea, frequency of drinking alcohol and physical exercising. We find a significant and large impact of health status on earnings, controlling for schooling, experience and the unobserved individual heterogeneity and job heterogeneity. We also find that smoking has a strong negative effect on earnings net of health status, while the estimated effects of other health-related activities are statistically insignificant.     

Managed care and the near-elderly: effects of plan enrollment on functionality

This paper examines the effects of enrollment in a health maintenance organization (HMO) or a preferred provider organization (PPO) on the functional status of near-elderly adults (aged 55–64), compared to traditional fee-for-service (FFS) plans. A sample of 1306 near-elderly adults with employer-sponsored health insurance are drawn from the 2000–2002 waves of the Health and Retirement Study, a nationally representative panel survey of community-dwelling adults. Regression models are estimated to assess the effects of different types of insurance plans on functionality, as measured by whether or not the individual has any functional limitations. The potential influence of selection bias into alternative types of plans is addressed by limiting the sample to near-elders without a choice of health plans. The effects of HMOs on functionality are shown to be comparable to those of FFS plans among the general near-elderly population. However, significant adverse effects of HMO enrollment on functional status are observed among near-elders with chronic conditions. PPO enrollees have similar functional outcome to FFS enrollees, even among those with chronic conditions. The observed differences in functional outcome across plans have important implications for the practicality of managed care plans serving older adults.     

基于DEA的中国经济增长资源利用效率探讨

采用DEA模型和Malmquist(曼奎斯特)生产率指数对中国1978年～2011年资源投入产出效率及全要素生产率增长构成进行分析,同时将中国资源投入产出效率与一些主要国家资源投入产出效率进行比较,结果显示,中国资源投入产出纯技术效率和规模效率有效,技术进步变化引起了全要素生产率整体提高.相对美国、日本、巴西等6个国家,中国全要素生产效率水平居中,但技术变化指数和纯技术效率指数均小于1,存在投资效率下滑态势.