松嫩平原自然宜垦性及耕地后备资源开发潜力

［目的］为保障我国粮食安全，为耕地后备资源的合理开发利用提供科学依据，同时完善中国区域耕地后备资源自然开发潜力方面的研究。［方法］文章从自然适宜性的角度出发，选取了地形、气候、土地类型和土壤4个方面15个评价因子，采用层次分析、专家打分等方法确定评价因子权重，构建松嫩平原宜垦性评价指标体系。［结果］（1）1980—2015年松嫩平原自然宜垦性整体较好，最适宜垦区与较适宜垦区占松嫩平原面积的5068%，分布在松嫩平原腹地大部地区，中部、中北部、中南部等地；(2)松嫩平原已开垦耕地资源中，持续利用耕地占松嫩平原面积的4814%，空间上与宜垦程度高值区高度吻合；(3)新增耕地占区域面积的126%，以中度适宜垦区和较适宜垦区为主；(4)松嫩平原耕地后备资源占松嫩平原土地面积的1556%，在松嫩平原西部地区、中部和东北部地区均有分布，耕地后备资源中度及以上宜垦区占后备资源总量的7465%。［结论］目前大庆市和白城市可开发耕地后备资源最为丰富，但其中轻度及不适宜开垦区所占比例大，开发难度较大； 松原市可开发资源相对丰富且开垦难度小。     

基于Q币的网络虚拟币属性与影响分析

Q币目前并不是货币,但具有一定的货币属性与功能,如有限度的流通性,相对的价值尺度职能,一定程度的支付手段等。就Q币的特征而言,Q币与法定货币之间存在着很大的差异,Q币不能代替人民币的作用。但虚拟币的无限创造能力成为潜在的不稳定因素,中央银行难以有效控制货币供给,可能危及我国的金融安全。我国应严厉打击倒卖Q币的行为,加强对Q币等网络虚拟币的金融监管,建立更安全便捷的支付渠道。     

马克思、恩格斯的人权批判的双重维度及其启示

马克思主义通过对西方近代人权观的法哲学批判,指出了人权的历史性;通过对资产阶级人权实质的政治经济学分析,揭示了人权的具体性。人权是普遍性与特殊性、应然性与实然性、社会性与个体性的统一。     

Tourism,changing architectural styles,and the production of place in Itacaré, Bahia,Brazil

This article examines changing architecture in Itacaré, Brazil, as it transitions from a fishing village to an international tourist destination. Tourism, as an assemblage of practices and perspectives, recreates places in specific ways that structure social and environmental relationships. Through an examination of historical architectural styles, tourist architecture, and popular architecture in Itacaré, this article analyses the ways a tourist economy has physically and socially rebuilt the city. Socially, the changing architecture marks and creates differences between class, racial, and regional identities while also providing an idiom through which public conversations about these changing economic systems and demographics are articulated. At the same time, the expansion of the city has led to racial-, regional-, and class-based segregation. Environmentally, tourist architecture creates new relationships to nature through re-imagining Itacaré’s position in relation to other rural and urban places and a new emphasis on the aesthetic value of nature.     

孔子人性论浅探

孔子虽然没有像孟子和苟子等人一样明确地提出人性论，但是却有许多直接和间接关于人性的论述。孔子的人性论从人情出发，对人性的弱点有着独到的观察，注重人性的经验论考察，充满人性关怀。孔子的人性论对当今社会治理仍有积极的借鉴意义。     

所有权性质、女性高管参与及企业R&D投入——来自科技型中小企业的经验证据

基于高层梯队理论，利用深圳证券交易所2008-2014年上市企业的数据，探讨了女性高管参与对企业R&D投入的影响，以及所有权性质的调节作用。研究结果显示：女性高管参与对企业R&D投入二者之间呈现出显著的负相关关系；民营企业的所有权性质将显著调节女性高管参与对R&D投入的抑制效应。     

浅析自然权利冲突与协调

通过对自然权利相关概念的分析与界定,明确自然权利的提出绝对不是没有现实基础的单纯思辩,而是有一定实际基础的.它的现实基础讲起来很简单,日益恶化的生态危机让人的生存问题开始严峻起来了,一方面人们开始重视人与自然之间的关系问题,开始思索人在自然当中的角色定位问题;另一方面是人与自然之间的冲突问题,即自然权利问题.要解决自然权利的问题,建立人与自然的协调发展,实现人类与自然界关系的全面、协调关系是人类生存与发展的必经之路.     

《野草在唱歌》的生态女性主义解读

多丽丝·莱辛的处女作《野草在唱歌》不仅展现了男权社会中女性和其他弱势群体的生存状态，而且还饱含作者对自然与人类间关系的深刻思考。《野草在唱歌》是从角色的共性、地位的共性、生态女性主义的终极关怀这三个角度来体现生态女性主义的。     

Risk analysis of the EASA minimum fuel requirements considering the ACARE-defined safety target

We present the results of flight simulator experiments (60 runs) with randomly selected airline pilots under realistic operational conditions and discuss them in light of current fuel regulations and potential fuel starvation. The experiments were conducted to assess flight crew performance in handling complex technical malfunctions including decision-making in fourth-generation jet aircraft. Our analysis shows that the current fuel requirements of the European Aviation Safety Agency (EASA) are not sufficient to guarantee the safety target of the Advisory Council for Aviation Research and Innovation in Europe (ACARE), which is less than one accident in 10 million flights. To comply with this safety target, we recommend increasing the Final Reserve Fuel from 30 min to 45 min for jet aircraft. The minimum dispatched fuel upon landing should be at least 1 h.     

Cropland expansion and grassland loss in the eastern Dakotas: New insights from a farm-level survey

The western Corn Belt region of the United States has become a hotspot for agricultural extensification and consequent land use and land cover changes. The goals of this research were to characterize geographic patterns of grassland loss resulting from cropland expansion in the eastern Dakotas, and to understand how these changes were associated with characteristics of individual farms and farm operators. We collected data on grassland conversion and other land use decisions through a mail survey of farm operators in North and South Dakota. Overall, 40% of respondents converted at least some grassland to cropland between 2004 and 2014, and the total acreage of converted grassland was equivalent to 5.1% of the surveyed farm acreage. Although most converted grassland acres (3.2% of farm acreage) were from land enrolled in the conservation reserve program (CRP), there were also substantial amounts of native grassland conversion (1.0%) and tame grassland conversion (0.9%). The total acreage of grassland conversion was more than four times larger than the acreage enrolled in CRP and other conservation programs. Different types of grassland conversion (e.g., native grassland versus CRP) were concentrated in different parts of the study region, and were spatially disjunct from the areas of highest conservation program enrollment. Larger farms were more likely than smaller farms to expand their cropland acreage and accounted for a disproportionate share of grassland conversion. Younger farm operators, higher levels of farm income, higher proportions of rented croplands, and marginal yields were also associated with cropland expansion and grassland conversion. Although CRP and other land retirement programs will remain important policy mechanisms for conservation in this region, they are not sufficient to maintain current levels of grassland cover and do not provide protection for native grasslands. Alternative conservation strategies and new agricultural policies are thus critically needed to maintain the ecosystem services provided by grasslands.