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143.
环江油田长8层注水井酸化增注工艺 总被引:2,自引:0,他引:2
通过对环江油田长8注水井欠注原因的分析,提出了深部酸化降压增注的技术思路,开展了酸液体系和酸化工艺研究,现场实施取得了良好的效果,为该区注水井降压增注提供了有效的手段。 相似文献
144.
针对目前装饰工程陕速估价方法的不足,以及装饰工程造价组成的特点,建立一种基于多元线性回归的快速估价新模型。以住宅类建筑为例,建立其多元线性回归模型,结合SPSS软件对样本分析,结果表明,其线性回归模型显著,同时,内墙、外墙、楼地面和窗的回归系数也非常显著。通过计算回归值与实际值的误差,发现误差比较理想,该模型具有很好的实用价值。 相似文献
145.
贾晓华 《地质技术经济管理》2009,(1):55-58
农民工选择非永久迁移是在约束条件下的一种理性选择,而这种非永久迁移却给经济增长带来许多负面影响,促进农民工定居城市已成为急需解决的问题。文章通过分析在促进农民工定居城市过程中的利益格局,从协调城乡间利益矛盾,减少制度变迁摩擦成本的角度,提出了促进农民工定居城市的路径选择。 相似文献
146.
根据山东省农产品运输及现代物流行业发展的形势,对山东农产品外运物流模式选择问题进行了研究。首先对山东省的农产品物流特征进行了调查和分析。其次,概括论述了非集计模型的基本建模理论以及模型的检验方法,分析了Logit模型的具体建模方法和模型结构。最后,在分析山东省农产品外运物流模式选择的相关影响因素的基础上,选用MNL模型建立了山东省农产品外运物流模式选择的非集计模型。 相似文献
147.
Cristina Bettinelli;Alfredo De Massis;Manisha Singal;John Davis; 《Journal of Management Studies》2024,61(7):2814-2848
The literature indicates that the board of directors exists to provide resources and strategic direction (service task) and monitor top managers (control task), often tending to overgeneralize board tasks. Using a unique sample of 36 elite family firm directors having served on 615 boards with an aggregate 1447 years’ experience, and integrating interview and secondary data with observations, we capture how the multiple role identity struggles experienced by family directors are managed in the board. Our data indicate that effective boards resolve multiple role identity struggles (i.e., family director ‘pathos’) through the mechanisms that boardroom structural forces trigger and the resulting bridge and buffer tasks enacted (i.e., board ‘ethos’), going beyond the traditional service and control tasks. 相似文献
148.
This paper examines the intersecting effects of power, trust and supplier network size on five dimensions of supplier performance (delivery, quality, cost, innovation and flexibility). When assessing main effects, coercive power shows a negative relationship with supplier quality and innovation, referent power shows a positive relationship with all dimensions of supplier performance and legitimate power shows a positive relationship with supplier delivery, cost and flexibility. The supplier's trust in the buyer also shows a positive relationship to all five supplier performance dimensions. While exhibiting no main effects, supplier network size moderates these power–performance relationships. Increasing supplier network size appears to attenuate the impacts of coercive and referent power upon supplier performance, while strengthening this connection in the case of legitimate power. Contrary to our hypotheses, expert power use exhibits a negative relationship with supplier delivery performance, an effect which is exacerbated with increasing supplier network size. Overall, this study suggests that while not as independently important as perhaps thought, selecting the right number of suppliers may have considerable contextual influence on the interplay between power, trust and performance in buyer–supplier relationships. 相似文献
149.
A Note on the Probability of Having a Strong Condorcet Winner 总被引:1,自引:0,他引:1
In an election, a strong Condorcet winner is a candidate who is top-ranked by more than 50% of the voters. The purpose of this note is to provide some algebraic representations for the probability of having a strong Condorcet winner in three-candidate elections. Three alternative procedures for generating voting situations are considered: the Impartial Culture condition, the Impartial Anonymous Culture condition and the Maximal Culture condition. It turns out that the conclusions we obtain strongly depend on the way for generating voting situations. 相似文献
150.
Despite the evidence on incomplete financial markets and substantial risk being borne by innovators, current models of growth through creative destruction predominantly model innovators’ as risk neutral. Risk aversion is expected to reduce the incentive to innovate and we might fear that without insurance innovation completely disappears in the long run. The present paper introduces risk averse agents into an occupational choice model of endogenous growth in which insurance against failure to innovate is not available. We derive a clear negative relationship between the level of risk aversion and long run growth. Surprisingly, we show that in an equilibrium there exists a cut-off value of risk aversion below which the growth rate of the mass of innovators tends to a strictly positive constant. In this case, innovation persists on the long run and consumption per capita grows at a strictly positive rate. On the other hand, for levels of risk aversion above the cut-off value, the economy eventually stagnates. 相似文献