浅论韧系统方法分析铜川循环经济场

将铜川市的各种资源——自然资源、经济资源、文化资源、历史资源等全面纳入循环经济场,将循环经济模式融入城市发展的整体规划之中,将可持续发展作为城市发展的长期目标,进而综合平衡建构一种以循环为核心内涵的场态经济体。在循环经济场中,涉及的问题往往都有极其复杂的巨系统问题,其中软、硬要素交织缠绕。在这种情况下,韧系统分析方法则融合了软、硬系统分析方法的长处,将二者的优势结合到一起,从而使其成为循环经济场系统分析中的新方法。     

《企业会计准则第27号——石油天然气开采》对石油天然气企业会计的影响分析

阐述了我国目前石油天然气企业会计处理中存在的问题,分析了《企业会计准则第27号——石油天然气开采》的相关规定,并在此基础上探讨了该准则对我国石油天然气企业经营业绩和会计核算的影响。     

玉米秸秆还田的受偿意愿分析——基于河北、山东两省的农户调查数据

秸秆还田作为目前秸秆资源化利用的主要方式之一,它有增加土壤有机质、改善土壤质量、提升作物产量等作用,同时还有保护生态环境、减少农业面源污染等功效。但秸秆还田所带来的成本增加,在某种程度上影响了农户秸秆还田的积极性,因此,给予农户一定补贴等激励措施势在必行。文章以玉米秸秆还田为例,基于河北、山东两省的农户调查数据,分析两个地区农户玉米秸秆的利用状况,在此基础上研究农户秸秆直接还田受偿意愿的影响因素。结果表明,农户受访者年龄、秸秆还田是否增加成本、秸秆还田增加的费用是否由政府承担、秸秆焚烧查处力度是否强、与秸秆不还田相比秸秆还田增加的费用这5个因素对农户秸秆还田受偿意愿有着显著的正向影响,而受访者是否是村干部和秸秆还田是否改善土壤质量这两个因素对农户秸秆还田受偿意愿有着显著的负向影响。     

坡改梯是西部贫困山区脱贫致富的有效途径

该文指出我国西部贫困山区的现状和所呈现出的特征以及西部贫困问题所形成的原因,特别强调了生态的破坏和教育的落后是贫困形成的重要因素。介绍了宁南县大同乡小流域治理,尤其是坡改梯工程带动全乡脱贫致富的成就。最后提出了在小流域治理中大力推行坡改梯工程的4点建议。     

How the provision of inflation information affects pension contributions: A field experiment

Ignoring the effects of inflation in retirement planning can have severe consequences for an individual's future financial well-being. Yet, many pension funds do not communicate inflation-related information, presumably for the fear of reduced contributions once the members understand how low the “real” return on saving for retirement is. As an alternative prediction, the provision of inflation information could increase pension contributions, because it reveals possible pension shortfalls. In cooperation with a major German pension fund, we conduct a field experiment, in which we vary the inflation information provided to the fund members, to explore this important issue. Among all participants, we find mostly positive but insignificant effects of the inflation information on pension contributions. Among those participants who voluntarily changed their pension contributions after the experimental intervention, the provision of inflation information significantly raises the likelihood of increasing pension contributions.     

上跨既有线联络通道的管幕结构施工方案比选研究——以福州滨海快线火车站管幕结构施工为例

依托福州滨海快线火车站与换乘枢纽联络通道工程，提出上跨既有线管幕结构施工的分步填充砂浆方案（即方案A）和一次性填充砂浆方案（即方案B）。在ABAQUS数值分析平台上对管幕结构施工全过程展开数值模拟，重点关注既有线竖向位移和收敛及地表沉降变化规律。分析结果表明：方案A引起既有线竖向位移呈逐渐沉降趋势，方案B则呈先上浮后沉降趋势，但两套方案引起的既有线最终竖向位移大致相同；方案A和方案B引起的最终地表沉降分布规律大致相同，都呈现不规则沉降槽状，最大值位于“口”字型管幕左侧轴线处，且方案B略小于方案A。从既有线影响及施工效率等方面考量，现场采取方案B进行管幕结构施工；同时对既有线竖向位移及地表沉降展开现场监测，其量值及发展规律与数值模拟大致相同。以上研究成果可为类似管幕结构施工提供借鉴参考。     

基于遗传算法的移动机器人路径规划研究综述

近年来，随着人工智能技术的不断发展，对移动机器人产业的开发和研究受到越来越多的重视。其中，路径规划作为移动机器人设计的关键核心技术之一，更是学术界、产业界关注和研究的热点问题。遗传算法作为智能仿生学算法在移动机器人路径规划中得到了广泛的应用。归纳总结了传统遗传算法、改进遗传算法、混合遗传算法在移动机器人路径规划研究中的应用情况，为相关专业技术人员了解遗传算法在移动机器人路径规划研究中的发展历程及算法应用提供一定的参考。     

Random sources correlations and carbon futures pricing

For a long time, the correlation between random sources has never been considered in carbon futures pricing, which virtually exists. We document the presence of high correlation between variations in convenience yields of carbon futures with different maturities, whose essence is correlation between random sources. Correlation of random sources arises from the long coverage of convenience yield of carbon emission spot and the complementarity in expiration between carbon futures with different maturities. Since if random sources are correlated will significantly affect the dynamics of convenience yield and finally affect futures prices, we introduce quantum field method to account for the impact of this correlation on futures prices, and proposes the correlation between random sources extended HJM convenience yield model (CRS-HJM-CYM). Empirical results indicate CRS-HJM-CYM performs better than traditional model owing to the role of correlation, which means the correlation between random sources is a pivotal factor in carbon futures pricing.     

交通便利度、分析师实地调研与股价同步性

分析师在证券市场上扮演着信息中介的重要角色,其私有信息挖掘能力具有显著的市场化价值.文章选择深圳证券交易所主板A股公司为样本,从私有信息获取方面,研究上市公司所在城市的交通便利度、接受分析师实地调研次数和股价同步性之间的关系.研究结论:(1)交通便利度与公司接受实地调研次数之间正相关;(2)伴随公司实地调研次数的增加,公司特质信息更显著地传递给市场,从而显著降低股价同步性;(3)相比于交通更为便利的公司,交通便利度低的公司接受分析师实地调研更能对股价同步性起到抑制作用.     

Restricted access: Real estate agent response to client race,ethnicity, gender,and side of market

We design and implement a correspondence experiment to test for differences in real estate agent response across client race, ethnicity, gender, and side of market. Real estate agents are more likely to respond to White clients than Black or Hispanic clients—Whites have a 32.18% higher response rate than Hispanics and an 8.48% higher response rate than Black clients. We also find that real estate agents are more responsive to sellers (23.81% premium over buyers) and female clients (13.57% premium over males).