步进式加热炉水封槽损坏原因分析和防范措施

针对步进式加热炉水封槽出现损坏的情况，分析了问题产生的原因并提出了对应的防范措施，取得了良好效果。     

世界经济新格局与中国经济长期增长前景

中国各行业企业资本边际收益率普遍下降,意味着中国宏观经济增速下行已成为必然趋势。实际上,这标志着中国在完成基本工业化后开始从高速增长阶段进入中低速增长阶段,这也是国际发达经济体和东亚新兴经济体都遵循的发展规律。面对经济增长的趋势性变化,货币政策对经济增长的刺激作用是非常有限的,大量超发货币只会加剧信贷泡沫、增加企业尝债能力的系统性风险。当前经济的核心问题在于宏观税赋过高和企业盈利能力不足,因此,最重要的财政政策应该是实施总量减税而不仅是结构性减税,尤其是对中小企业减税减赋,才能增加就业,提高居民消费比例,转变经济增长方式。     

An alternative proof of Fishburn’s axiomatization of lexicographic preferences

We present an alternative proof of Fishburn’s (1975) axiomatization of lexicographic preferences. The essence of our proof lies in identifying “an extremely pivotal factor”. Our proof reconfirms the strong interconnections between Arrow’s and Gibbard–Satterthwaite’s theorems with Fishburn’s axiomatization.     

关于我国公益性地质队伍装备投资问题的思考

文章简要回顾了 1994年以来 ,各届政府领导对公益性地质队伍技术装备的重视 ,分析了从事公益性地质调查工作队伍的野外设备、实验测试设备、海洋调查设备现状及急需解决的问题 ,阐述了 2 0 0 3～ 2 0 0 5年国家利用国债专项资金装备公益性地质队伍的特点 ,并据此提出了完善地质调查固定资产管理 ,最大限度发挥新技术装备最大效益的建议。     

Response of industrial customers to hourly pricing in Ontario’s deregulated electricity market

This paper uses hourly data from Ontario (Canada) between 2005 and 2008 to estimate the effects of real time wholesale electricity prices on demand by industrial customers. Nonlinear SUR estimates from Generalized Leontief (GL) specifications reveal elasticities of substitution from 0.02 to 0.07, confirming that industrial customers (connected to the transmission grid) shift consumption across peak and off-peak periods in order to reap benefits of lower prices. Estimates from FGLS and IV models suggest that this reduction in demand by industrial customers results in lower wholesale prices, which benefits all consumers. The policy lesson is that market based schemes that encourage Real Time Pricing (RTP) pricing should result in positive spillovers to all consumers.     

Tops-only domains

In this paper we consider the standard voting model with a finite set of alternatives A and n voters and address the following question: what are the characteristics of domains \({\mathcal D}\) that induce the property that every strategy-proof social choice function \({f: {\mathcal D}^n \rightarrow A}\) satisfying unanimity, has the tops-only property? We first impose a minimal richness condition which ensures that for every alternative a, there exists an admissible ordering where a is maximal. We identify conditions on \({\mathcal D}\) that are sufficient for strategy-proofness and unanimity to imply tops onlyness in the general case of n voters and in the special case, n = 2. We provide an algorithm for constructing tops-only domains from connected graphs with elements of A as nodes. We provide several applications of our results. Finally, we relax the minimal richness assumption and partially extend our results.     

利用辐照和混合酶制剂综合处理上部烟叶的研究

对利用辐照和混合酶制剂综合处理改善上部烟叶品质进行了研究。结果表明:①辐照可以改善烟叶的评吸质量,最佳辐照剂量为6～9KGy。②烟叶加入α-淀粉酶和复合蛋白酶后贮存13～16 h效果最好,当烟叶贮存16h后,淀粉、蛋白质和总氮量分别减少了76%、22%和8%,总糖和还原糖的含量分别增加了3%及7%。烟叶经过辐照和复合酶2步综合处理后,烟叶的感官质量明显改善,可用性增加。     

利用辐照和混合酶制剂综合处理上部烟叶的研究

对利用辐照和混合酶制剂综合处理改善上部烟叶品质进行了研究。结果表明：①辐照可以改善烟叶的评吸质量,最佳辐照剂量为6～9KGy。②烟叶加入α-淀粉酶和复合蛋白酶后贮存13～16 h效果最好,当烟叶贮存16h后,淀粉、蛋白质和总氮量分别减少了76%、22%和8%,总糖和还原糖的含量分别增加了3%及7%。烟叶经过辐照和复合酶2步综合处理后,烟叶的感官质量明显改善,可用性增加。     

EOQ模型的初等解法及其性质

在求解一般经济订货批量(EOQ)模型时,国内外文献通用的解法是多元函数求极值的微分学方法。本文提出了一种基于模型结构的初等数学解法。这一解法不仅简单易懂,且能将模型的一些重要性质鲜明地揭示出来。