船舶电池储能系统管理策略研究

目的 降低船舶污染排放,延长电池使用寿命,改善变工况条件下储能系统的动力性.方法 电池系统采用基于经验模态分解及模糊控制的双层管理策略,以磷酸铁锂电池组为主动力源来承担平缓功率,超级电容组为辅动力源来承担高频功率,引入样本熵对功率信号进行评估.结果 以某船舶工况进行仿真,相较于单一经验模态策略,引入模糊修正策略后的磷酸...     

Values of Farmers, Sustainability and Agricultural Policy

This article describes the feasibility of researchinto the relation between values of farmers andsustainability for the Dutch Ministry of Agricultureand the Dutch Federation of Agricultural andHorticultural Organisations.Firstly, a theoretical framework describes differentlevels of motivation behind conduct and choices. Itenables exploration and analysis of individualinterviews with small groups of conventional andecological farmers. The aim is to find out what theirbasic convictions regarding nature and sustainabilityare, and to analyze the relation between theseconvictions and the actual choices they make in theirfarming practice. The research shows that for somefarmers, differences in farming practice go back to themotivation level of moral convictions about what is`good farming'. For others, the motivations for aspecific farming practice are more pragmatic or`superficial'. This knowledge can be of significancefor the process of policy making.Secondly, this research demonstrates thatinvestigation into the relation between values andbehavioral choices is possible. The analysis ofinterviews among a small group of farmers gives anidea of the importance of personal values in additionto (and sometimes of more importance than) economicconsiderations. Due to the restricted size of theresearch population, however, these conclusions are oflimited generalizability. Finally, in order to make alarger research agenda possible, the research methodology isevaluated on the basis of scientific criteria.     

Adsorption Air Cleaning From Ozone

Not much has been written about air cleaning from ozone. The aim of this paper was to demonstrate the possibility of adsorption air cleaning from ozone. The second aim was to investigate the dependence of the efficiency of ozone removal from the air on the height of the adsorber layer and on concentrations of ozone, and to obtain empirical formulas for calculating the efficiency of ozone treatment. Equipment for air cleaning from ozone and nitrogen and sulphur dioxides is suggested.     

基于EEMD-LSTM模型的尾矿库风险预测模型研究

为了提高尾矿库风险预警能力,针对尾矿库稳定性受多种风险因素影响,以及风险变化的非线性,提出1种融合集合经验模态分解(EEMD)和长短期记忆(LSTM)的尾矿库风险预测模型。首先,采用皮尔逊相关系数分析尾矿库风险因素之间的相关性;然后,使用EEMD方法分解非线性的位移序列;最后,构建LSTM网络模型预测位移变化。以某尾矿库为例,将EEMD-LSTM模型与EEMD-BP模型、LSTM模型对比分析,评估模型的有效性。研究结果表明：EEMD-LSTM模型对尾矿库风险的预测精度明显提高,对防范化解尾矿库安全风险具有重要意义。     

徐州市气溶胶光学厚度与PM2.5相关性及年周期特征

基于徐州市2014～2017年气溶胶光学厚度(AOD)、地面监测站PM_(2.5)浓度及气象数据,构建经标高订正的AOD(AOD/H)与经湿度订正的PM_(2.5)(PM_(2.5)×f_((RH)))之间的5种不同类型的拟合模型,分析两者在不同季节的相关性;同时利用经验模态分解对AOD/H与PM_(2.5)×f_((RH))进行周期变化分析。结果表明:AOD与PM_(2.5)浓度直接相关程度较低,经过订正后两者的相关程度显著提高;选取乘幂模型为最优拟合模型,利用乘幂模型估计得到的PM_(2.5)浓度与地面监测的经湿度订正的PM_(2.5)浓度呈显著正相关,相关系数在四季分别达到0.752、0.650、0.808和0.942;利用经验模态分解分析得到AOD/H与PM_(2.5)×f_((RH))具有显著的年周期变化特征,均在冬季出现高值,后逐渐降低,在6月前后出现极小值,到秋季又逐渐增大;AOD/H与PM_(2.5)×f_((RH))年变化特征表现出很高的一致性(r=0.888),表明在徐州地区AOD/H对PM_(2.5)×f_((RH))在年周期尺度变化特征研究中能起到良好的指示作用。     

南京市快速城市化时期城市用地优化评价实证研究

我国已经进入快速城市化的关键时期。城市用地需求激增，城市空间变化剧烈。按照科学发展观的时代要求,正确评价城市土地的利用水平，促进区域城市的健康和谐发展，具有十分重要的意义。以南京市为例，总结了城市用地建设中存在的城乡失衡、耕地危机、功能削弱、效率降低等主要问题，并尝试建立土地利用优化评价模型，以综合判断在快速城市化阶段城市用地的集约化程度。通过对南京市的实证分析可见，在城市的迅速扩张中，城市用地的确存在集约水平波动的现象，而且不同指标呈现差异化发展趋势。21世纪的城市土地利用，由粗放到集约、由重量到重质、由紊乱到有序是必然选择。     

服务外包产业发展规律和效应评估的研究进展

随着经济全球化及网络通讯技术进步,服务外包已成为重塑世界产业格局的重要力量,其相关研究引起了学者的广泛关注。主要对服务外包产业发展规律和效应评估的相关研究进行综述。首先介绍了服务外包产生的主要理论观点,并梳理其演进过程及空间分布的研究进展;其次讨论服务外包效应评估的研究内容,其中发包国效应围绕就业、工资、生产力3个方面展开,承接国效应从经济、社会、技术外溢3个角度分析;第三,从理论和实证两个层面对效应评估方法进行了总结,重点基于投入产出表数据、研究报告数据及贸易数据归纳了测度外包水平的不同方法;在综合评述的基础上,展望了未来的研究趋向     

Model Modification and Application on Carrying Capacity of Relative Resources

Abstract

Based on the retrospection of researches on carrying capacity, this article reviewed systematically the research progresses on carrying capacity of relative resources (CCRR). Then the viewpoint was put forward that CCRR is not an appropriate method of appraising the regional sustainability, but a sound way to obtain cognition for coordinating spatial location and flow of population and economy. However, as the most popular computing method of CCRR, the Weighting Linear Sum Model is defective in the random of weight choice and the neglect of matching among different resources. Therefore, this article established the Geometric Model on CCRR based on modifying Weighting Linear Sum Model, which can be used to appraise regions where resources are close matching. Employing the Geometric Model, the article empirically analyzed the population and economic CCRR in Hubei Province from 1978 to 2006. The result indicates that the population in Hubei Province is overloading while the economic carrying capacity is abundant compared to the whole country, and the economic insufficiency restricts the population carrying capacity. In the future, Hubei Province will become one of the core developing zones which are characterized by economic conglomeration.     

《刑法修正案（十一）》背景下污染环境罪刑罚适正性研究

《刑法修正案（十一）》修订呈现出刑事立法对于预防与从严惩处犯罪理念的贯彻,在回应风险社会诉求的同时,立法价值观、犯罪观、刑罚观层面客观存在的二律背反现象,引发了学界对于刑罚介入边界的激烈争论。本文基于648份污染环境罪判决书,利用回归分析对污染环境罪包括有期徒刑、拘役、缓刑在内的多个判决结果与影响因素间的内在机理进行实证分析。研究表明,污染环境罪刑罚存在刑罚力度整体轻缓,金钱类环境责任序位混乱,将环境修复作为量刑情节考量指引效果较弱等问题。针对以上问题,一方面通过宽严相济纾解刑罚适用“轻刑化”之困,并重新区分以危险犯和实害犯为基准的刑罚结构;另一方面通过生态修复规范化建立积极的司法导向,并以此重构罚金刑体系。从而达到犯罪控制与生态恢复双重目的,为污染环境罪刑罚研究添砖加瓦,形成具有中国特色的环境犯罪刑罚治理体系。     

中小企业工伤事故区域性特征的实证分析及对策研究

不同地区中小企业发生的工伤事故有其自身的特点和规律。通过对江苏省某市2001—2004年发生在中小企业的工伤死亡事故进行实证分析发现:该市工伤死亡事故集中发生在非煤矿山、建筑等6行业的中小企业中,事故类别以高处坠落、物体打击等6种为主;工龄较短的中青年职工在罹难者人数中所占比例较高;工伤死亡事故的发生频率夏季高于其他3个季节;事故发生的主要原因是违反操作规程。笔者认为:应促进企业增加安全投入,尤其要重视“软”投入;监管部门要明确安全监管重点,分类分级管理企业,以控制和预防工伤事故的发生。