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本文结合实际案例,对公路路基扩建加宽的重要性进行分析,然后针对当前改扩建道路路基加宽施工中容易遇到的问题以及一些施工难点进行分析,并对我国公路的路基改扩建加宽施工技术、台阶施工以及路基填料等方面的具体应用进行了分析,期望对提高我国道路建设效果具有一定的借鉴和参考意义. 相似文献
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近些年来,我国电力企业人员培训获得长足发展,但与国外先进理念及做法相比,仍存在一定差距。本文运用比较研究法,剖析国内、外人员培训发展总体趋势及其异同,以获取相关经验、发现不足,进而联系我国电力企业,提出相应建议。 相似文献
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Mark Stevenson Jason Thompson Jasper S. Wijnands Kerry Nice Gideon Aschwanden Haifeng Zhao 《International journal of injury control and safety promotion》2020,27(1):20-26
AbstractOver the past four decades considerable efforts have been taken to mitigate the growing burden of road injury. With increasing urbanisation along with global mobility that demands not only safe but equitable, efficient and clean (reduced carbon footprint) transport, the responses to dealing with the burgeoning road traffic injury in low- and middle-income countries has become increasingly complex. In this paper, we apply unique methods to identify important strategies that could be implemented to reduce road traffic injury in the Asia-Pacific region; a region comprising large middle-income countries (China and India) that are currently in the throes of rapid motorisation. Using a convolutional neural network approach, we clustered countries containing a total of 1632 cities from around the world into groups based on urban characteristics related to road and public transport infrastructure. We then analysed 20 countries (containing 689 cities) from the Asia-Pacific region and assessed the global burden of disease attributed to road traffic injury and these various urban characteristics. This study demonstrates the utility of employing image recognition methods to discover new insights that afford urban and transport planning opportunities to mitigate road traffic injury at a regional and global scale. 相似文献
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Hui Liang James 《Review of Financial Economics》2020,38(2):275-299
This study investigates the association between CEO age and corporate tax planning. Using a sample of 11,537 firm‐year observations from the fiscal year 1997–2013, I find CEO age exerts an economically significant influence on firms’ tax policies, incremental to economic determinants identified in prior research. Specifically, CEO age is positively related to cash and GAAP effective tax rates, and negatively related to permanent book‐tax difference, suggesting that older CEOs are less likely to take actions to lower tax burden. The results hold across different model specifications and robustness tests to address potential bias arising from endogeneity, sample selection issue, and the confounding effect of CEO tenure. 相似文献
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We consider a robust consumption‐investment problem under constant relative risk aversion and constant absolute risk aversion utilities. The time‐varying confidence sets are specified by Θ, a correspondence from [0, T] to the space of the Lévy triplets, and describe a priori drift, volatility, and jump information. For each possible measure, the log‐price processes of stocks are semimartingales, and the triplet of their differential characteristics is almost surely a measurable selector from the correspondence Θ. By proposing and investigating the global kernel, an optimal policy and a worst‐case measure are generated from a saddle point of the global kernel, and they constitute a saddle point of the objective function. 相似文献
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