An Analysis of Labor Transfer Fluctuation in China: An Empirical Study Based on A RBC Model

A RBC model is built to study labor transfer fluctuation in China. Then an empirical study of labor transfer between 1978 and 2009 is conducted mainly to explore the impacts of technology shocks on the labor transfer in China. The study has several main findings. Firstly China’s labor transfer has obvious cyclical fluctuation, and it is pro-cyclical with output. Secondly with the improved RBC model, the variance of China’s cyclical fluctuation can be mainly explained by technology shocks, and especially over half of fluctuation of labor transfer can be explained by it. Thirdly technology shocks have a positive effect on outputs, consumptions, investments and labor transfer, but it has a negative effect on the employment.     

猪传染性胸膜肺炎的临床病理学研究

对一猪场自然爆发的猪病进行的临床病理学研究结果表明：该起由猪嗜血杆菌引起的疾病临床上主要表现为高热稽留、呼吸困难、精神沉郁、腹泻与呕吐等症状。病理方面则主要表现为出血性坏死性纤维素性肺炎、广泛性胸膜肺炎、泛发性出血性淋巴结炎、急性脾炎、全身广泛性淤血及出血等变化。这种临床病理变化特征说明该病是一种以胸膜肺炎为主的急性热性出血性败血病。     

猪生殖—呼吸综合征合并感染猪传染性胸膜肺炎的临床病理学研究

对自然感染并经血清学和病原学定性为猪生殖—呼吸综合征（ＰＲＲＳ） 合并感染猪传染性胸膜肺炎的１０ 头仔猪进行了临床病理学研究，结果表明，其临床表现为高热稽留，呼吸困难；病理表现为纤维素性胸膜肺炎，非化脓性脑炎，急性出血性淋巴结炎及脾炎，广泛性淤血及出血性素质。猪合并感染上述两种病的临床症状和病理损伤远较单一发病严重且死亡率极高     

坚持理论联系实际的原则是搞好高校邓小平理论教育的关键

本文指出：在高等院校对大学生要加强邓小平理论教育，这是一件具有深远意义的大事。在这一教育中，应当始终坚持理论联系实际的原则，并探索多种多样的教育形式和方法，只有这样，才能卓有成效，也才更有实际意义     

储层伤害试井评价新方法研究

针对传统储层伤害试井评价的污染带渗透率求取存在较大偏差，进而影响表皮系数准确分解的问题，建立了改进的麦金利图版试井分析新模型，利用拉普拉斯变换进行了求解，并编程绘制了新的分析理论图版（改进的麦金利图版），获得了新的拟合解释方法，可以非常准确地求取污染带渗透率。再利用Hawkins 公式，优化计算真表皮系数和污染半径，从而利用污染带渗透率、污染半径和真表皮系数进行储层伤害试井评价。最后，进行了实例分析，结果符合现场实际，为改善储层、采取措施提供了依据。     

Race and STEM Degree Attainment

This paper reviews the key literature on racial disparities in entry and persistence to attain a STEM bachelor's degree. Overall, the literature provides quite consistent evidence that Black and Hispanic students are well represented in college major choices in STEM, which testifies to the interest of racial minorities in STEM fields. However, they are left behind during college, and many are left without a STEM degree or any degree whatsoever. We emphasize that although racial minority students may seem to be left behind during college in STEM fields, the problem dates further back to pre‐college. We need to examine college and pre‐college studies in an integrative manner, in order to achieve full understanding and come up with the right solution to the problem of racial disparity in STEM attainment.     

流通产业的改革与发展:一个理论前瞻

本文给出了一个描述商品流通企业生存发展条件的简单模型.通过模型分析指出商品流通企业改革与发展的中心,是降低进货价和经营成本,同时设法提高商品的效用与附加值.文章最后以此为理论依据,对我国商品流通产业的组织、业态、区域分布等方面的改革发展趋势进行了初步预测.     

General Probability‐Time Tradeoff and Intertemporal Risk‐Value Model

This article proposes an intertemporal risk‐value (IRV) model that integrates probability‐time tradeoff, time‐value tradeoff, and risk‐value tradeoff into one unified framework. We obtain a general probability‐time tradeoff, which yields a formal representation form to reflect the psychological distance of a decisionmaker in evaluating a temporal lottery. This intuition of probability‐time tradeoff is supported by robust empirical findings as well as by psychological theory. Through an explicit formalization of probability‐time tradeoff, an IRV model taking into account three fundamental dimensions, namely, value, probability, and time, is established. The object of evaluation in our framework is a complex lottery. We also give some insights into the structure of the IRV model using a wildcatter problem.     

基于完全竞争的生物质制氢产业市场结构分析

相对化石能源,生物质氢能源是一种理想的可再生能源,由于尚未形成有效的产业化市场价格机制,其产业化应用进展缓慢,对此,本文从完全竞争市场模型出发分析其产业化的理论机理。首先,建立了完全竞争的生物质制氢厂商的社会福利优化模型,然后,讨论了优化模型解的两个条件,进一步得出了生物质制氢厂商利润最大化的条件。在此基础上,从增加生物质制氢供给,降低厂商研发成本角度提出了初步的政策建议。