青海省牛鼻子梁地区铜镍矿床的地质特征及找矿前景分析

牛鼻子梁地区铜镍矿床位于柴达木盆地西北缘,阿尔金山南坡.根据板块构造划分,本区大地构造位置属柴达木陆块的柴达木中新生代后造山磨拉石前陆盆地.根据三轮区划成矿带划分,本区属俄博梁华力西期铁、铜、铅、锌、稀土、(钨、铋)成矿带.区内出露地层主要为古元古代金水口岩群斜长片麻岩、透闪石大理岩和第四纪地层.     

路基稳定性数值分析

本文通过对常见的路基稳定性分析案例进行强度折减法的数值分析,为进一步研究这一方法在路基稳定性分析中的应用奠定基础。     

利用取土场废置高边坡进行景观提升改造的技术应用

对一县城道路入口处的废置取土场37m高边坡进行治理,并根据取土场现状地貌设计假山、人工瀑布、绿化设计等进行景观提升改造,通过优化绿地空间格局,完善公园的游览系统、服务设施、植物群落等方面,有效改善入城口区域城市风貌,同时也为周边的社区居民提供日常休闲、娱乐、游览和康体活动的公共空间,并充分发挥其作为南部新城区域中心森林氧吧的生态作用,形成稳定的、可持续发展的城市绿色生态系统。     

土质边坡分析中的极限平衡法与有限元强度折减法的研究

介绍边坡分析的极限平衡法与有限元强度折减法原理,比较两者优缺点。对均质土坡分别采用有限元强度折减法与极限平衡法进行计算,得到相应的安全系数和潜在破坏面,得到两种方法所得安全系数和破坏面一致的结论,应用有限元强度折减法计算是合理可行的。     

高层结构施工应注意的几个问题

针对铜陵地区特殊的地质条件,文章就高层建筑地下室地基土方施工应注意的问题,以及本地区高层建筑施工中混凝土施工缝留设、地下室混凝土壁板抗渗、钢筋施工、混凝土界面处理等方面常见的问题及处理措施进行了分析。     

会计对称理论:会计准则制定的优化路径

会计对称理论应作为会计准则制定的重要原则。会计对称理论作为中立性的可实现途径,能在理论上解决中立性和准则制定经济后果之间的矛盾。将会计对称理论纳入会计信息质量框架中,可简化会计准则规范方法、优化会计准则内容、提升会计信息质量,同时对会计、审计、统计等实务工作产生积极影响。     

三峡库区万州某中学高边坡支护方案价值分析

利用价值工程原理对三峡库区万州某中学新校址高边坡的加固方案进行评估。评估比较发现,在满足稳定性要求的情况下,锚索抗滑桩方案的价值要优于锚索格构方案的价值。同时利用价值工程原理对所选用方案的各分项工程的功能进行优化,使功能与成本更趋合理。最大限度的满足了功能的需求度,降低了成本,创造了较好的经济效益。     

Teaching Third-Degree Price Discrimination

Abstract: Third-degree price discrimination is taught in almost every intermediate microeconomics class. The theory, geometry, and the algebra behind the concept are simple, and the phenomenon is commonly associated with the sale of many of the goods and services used frequently by students. Classroom discussion is usually vibrant as students can relate their experiences of being on the receiving end of third-degree price discrimination, usually to their advantage. However, the precision of the language used in the exposition of the theory in textbooks is generally less precise than one would hope for, leading students to confuse slope and elasticity. The authors ask textbook writers to provide greater precision in their explanation of why differing elasticities are associated with the prices paid by two (or more) distinct groups of buyers facing third-degree price discrimination.     

一场影响深远的错误批判——试述对马寅初《新人口论》的批判

1953年的人口普查引起我国著名经济学家马寅初的高度重视,他通过实地调查,于1957年提出《新人口论》,分析了我国人口增长同生产力发展的矛盾,从而提出控制人口的主张。但由于极左思潮的影响,《新人口论》遭到批判。各种批判文章将马寅初的《新人口论》和马尔萨斯的人口论挂钩,指责马寅初的《新人口论》是新马尔萨斯主义。这场错误批判产生了严重的后果,它把许多人口学家错误地打成右派,使我国人口理论的研究停滞,使计划生育工作受到严重挫折。     

Intergenerational Earnings Inequality: New Evidence From Italy

Using an innovative dataset built by merging survey and administrative data, we provide new estimates of intergenerational earnings’ inequality between fathers and sons in Italy, extending previous evidence in several directions. We rely on the TSTSLS method to predict fathers’ earnings and compute intergenerational elasticities and imputed rank–rank slopes, trying to reduce estimation biases. Confirming previous evidence, we find that Italy is characterized by a high intergenerational inequality in cross-country comparison. Extending previous analyses, we show that the intergenerational association increases when sons at older ages and multi-annual averages of pseudo-fathers’ and sons’ earnings are considered. We also find that the intergenerational persistence differs across geographical macro-areas and is high also for daughters, especially when family earnings are considered. Furthermore, estimates where possible mediating factors of the parental influence are included among the covariates show that a high intergenerational association persists when sons’ education and occupation are controlled for.