遥感技术农业资源台账建设应用潜力分析

目的 为了系统地分析遥感技术在农业资源台账建设中的应用潜力。方法 文章通过文献研究,阐述了农业资源台账的研究现状,分析了农业资源遥感监测数据源与监测技术的发展趋势,研判了当前遥感技术在农业资源台账建设中的应用潜力。结果 （1）农业资源台账的建设内容主要包括农业资源清单、农业资源评价两个方面,具有空间与时间两种属性。（2）农业遥感数据源向着高空间分辨率、高时间分辨率、高光谱分辨率的方向发展,其监测技术向着多源遥感数据融合应用、智能分类、多维海量数据高效计算的方向发展。（3）遥感技术可对农业资源清单中的主要农业自然资源和社会经济资源的信息进行获取,对农业资源组分评价与农业生态系统整体评价也有很大潜力。结论 总的来看,农业资源台账建设内容不断丰富,遥感技术在农业资源台账建设中的应用能力显著提升,其应用潜力仍有很大的上升空间,对高效开展农业资源台账建设具有积极作用。     

基于村级尺度的重庆荣昌区村庄发展潜能评价与类型划分

目的 村庄是落实乡村振兴战略的细胞单元,厘清村庄发展潜能,科学划分村庄发展类型,是乡村振兴战略差别化精准施策的基础。方法 文章基于乡村振兴“产业兴旺、生态宜居、乡风文明、治理有效、生活富裕”5个维度,科学选取评价指标,构建村庄发展潜能评价体系,并以课题组于2018年对重庆市荣昌区133个村庄开展的乡村振兴专项调查研究结果为基础,开展了村庄发展潜能评价和类型划分。结果 （1）受地域人口、土地、产业等综因合素影响,荣昌区村庄发展潜能总体呈现“西北弱、东南强”的空间分异性。村庄空间发展集聚潜能已形成以城区为中心向乡村区域由高值向低值呈圈层逐级递减的区间分布态势;（2）基于乡村振兴村庄发展潜能评价,将研究区案例村庄划分为产居引领、资源提整、极化辐射3种不同的发展类型,并辅以相应的差别化发展策略或路径。结论 契合乡村振兴目标,结合村庄资源禀赋和发展潜能,划分村庄发展类型,差别化实施乡村振兴策略,对科学全面实施乡村振兴战略具有重要的意义。     

Trajectories in human domination of ecosystems: Human appropriation of net primary production in the Philippines during the 20th century

The “human appropriation of net primary production” (HANPP) has been suggested as a comprehensive indicator to measure impacts of human land use on ecosystems. It accounts for (a) human-induced changes in biological productivity and (b) biomass harvest. This study presents an analysis of aboveground HANPP in the Philippines between 1910 and 2003, a period characterized by massive deforestation and increases in land use intensity and biomass extraction. Results show a steep increase of aboveground HANPP from just below 35% of potential productivity in 1910 to slightly above 60% in 1970 and constant values since then. Large-scale changes in land cover and agricultural practices were the main direct determinants of this trajectory in HANPP. Remarkably, HANPP grew at much slower pace than population did: While the amount of NPP appropriated by humans doubled throughout the period, population increased by a factor ten. Increasing efficiency in terms of biomass extraction per unit of area, relying on ever-increasing inputs, and changes in the nation's physical biomass trade balance were of major importance for this difference in growth rates. In the coming decades, the Philippines will have to face the challenge to meet increases in biomass demand without putting even higher strains on the ecosystems.     

跨区域流动要素对区域经济发展的影响

跨区域流动要素对区域经济发展的影响是多方面的.首先是区域间贸易和要素流动规模的扩大,提高了区域经济发展的一体化程度,分散了区域性供给或需求波动对区域经济发展的整体冲击力,进而强化了改革开放以来区域经济波动周期延长与强度下降的趋势.其次是要素流动规模的扩大不仅进一步拓宽与疏通了经济波动的区域间的传导渠道,而且提高了区域间经济增长与波动的相互解释力,增强了彼此间的因果关系和减弱了彼此间的同步性.     

浅议上海以一流国际金融中心为建设目标

过去十年,上海已经初步建成了国内金融中心。并且上海市政府提出在2010年基本建成亚太地区的国际金融中心之一的目标。但是到底上海将最终建设成为什么样的国际金融中心,目前尚无定论。因此,笔者在上海与香港分工协作前提之下,就谁应建设成一流国际金融中心的问题提出一些不同     

外商直接投资对中国西部矿业的潜在发展

文章对外商直接投资我国矿业的重要意义进行了全面论述,进而又分析了当前影响外商直接投资矿业的种种障碍,最后提出了克服这些障碍的三大举措.     

A Rich Vein for “Reality Mining”北大核心CSSCISSCI

Arik Hesseldahl In the aftermath of the September 11 attacks, U.S. officials quickly turned their attention to other potential targets, including California's Golden Gate Bridge. What would happen if terrorists took down the bridge between San Francisco and Marin County? How much of the region would be affected and for how long?     

两种视角下成渝城市群（四川）经济发展潜力评价方法研究

[目的]成渝城市群是我国西部的经济增长引擎,准确地判断其经济发展潜力对促进城市群的发展有着重要的作用。[方法]研究重点在于统计数据的可视化表达,构建出一套基于行政地域的经济潜能发展评价指标体系。在行政区视角和空间视角上,对该区域的经济发展、资源环境支持、科技创新能力等进行量化和评价。在行政区视角,研究采用统计数据与行政区单元相匹配的方法进行空间化。在空间视角,采用空间吸引力算法、辐射能力算法和核密度算法,分别对空间数据进行量化和表达。[结果]从评价结果看,较准确地反映了区域经济发展潜力现状,在行政区视角,可以较好地实现区域间的横向比较。而在空间视角,突出作为承载构成行政区相关统计数据的空间设施在区域的分布格局所引起区域经济潜能的差异化格局。[结论]基于空间视角的评价,可以更准确地把握微观差异和空间的集聚效应,明确进一步提升区域内经济潜能的空间实施路径。     

The Experience of Untapped Potential: Towards a Subjective Temporal Understanding of Work Meaningfulness

In this paper, we propose that untapped potential acts as a subjective temporal meaning‐making mechanism. Using a two‐wave survey design, we examine the relationship between job characteristics, untapped potential, and work meaningfulness in a heterogeneous sample of 542 employees. We found that employees’ perceived amount of untapped potential mediates the effects of skill variety, autonomy, and job feedback on work meaningfulness. This mediated relationship was moderated by the valence employees attributed to their untapped potential. Moreover, decreases in the perceived amount of untapped potential over time were related to increases in perceived work meaningfulness. Our research shows that work that allows employees to move beyond the here‐and‐now by providing opportunities to realize future work selves is experienced as particularly meaningful. We conclude that, if we wish to understand what makes work meaningful for employees in the present, we need to know how it aligns with their self‐perceptions in the future.     

Disruptive technology adoption,particularities of clustered firms

ABSTRACT

This article explores to what extent the internal attributes of a clustered firm influence its capacity to adopt disruptive innovations. A multidimensional approach to the absorptive capacity (ACAP) model is used to distinguish between potential (acquisition and assimilation domains) and realized (transformation and exploitation domains) internal firm capabilities. Our evidence comes from an empirical analysis of the population of firms belonging to the Spanish ceramic tile cluster which have adopted a disruptive innovation – the so-called digital printing technology – on a massive scale. The econometric estimations suggest the relevance of the Exploitation dimension of ACAP for early adoption of a new technology. In contrast, the other dimensions do not seem to play a decisive role when it comes to adopting one novelty earlier than others. In conclusion, and contrary to what was expected for non-clustered firms, the results revealed an uneven effect of the potential and realized domains of ACAP of clustered firms regarding the rate of adoption of distant technologies.