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京秦高速公路计重系统养护改造思考
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作者 吕璇 《中国交通信息化》 2015年第6期95-97,共3页
高速公路收费方式采用"人工判别车型、人工收费、检测器监测、计算机管理,闭路电视监视"的人工半自动收费方式,按照车型和行驶里程并结合计重收费的方式收取通行费,目前的大多数计重系统养护的重点都放在了计重衡器的选择上面... 高速公路收费方式采用"人工判别车型、人工收费、检测器监测、计算机管理,闭路电视监视"的人工半自动收费方式,按照车型和行驶里程并结合计重收费的方式收取通行费,目前的大多数计重系统养护的重点都放在了计重衡器的选择上面,通过改造称重衡器,提高车辆称重的精确度、称重数据的一致性,保证公平公平,防止逃费,但防止逃赍不仅需要计重衡器的改造,还需要其他技术手段的辅助支持,比如数据挖掘稽查软件的应用等在计重设备的应用思路上也应该有所改变,计重系统不仅要实现合法车辆的计重收费,还需要实现非法超载车的禁止上路,既保证路段的通行费收入,又保证路段的道路。 展开更多
关键词 高速公路 称台 逃费 入口计重 治超
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The Dual Effects of Global Value Chain Embeddedness on Chinese Exports’ Technological Sophistication
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作者 刘维林 李兰冰 刘玉海 《China Economist》 2015年第1期58-72,共15页
This paper develops a framework for the assessment of global value chain embeddedness based on the dual structure of product embeddedness and functional embeddedness and provides a theoretical demonstration of the dua... This paper develops a framework for the assessment of global value chain embeddedness based on the dual structure of product embeddedness and functional embeddedness and provides a theoretical demonstration of the dual effects of the level, structure and the value sources of global value chain embeddedness on export technology sophistication. From there, the paper carries out an estimation of non-competitive input- output table using quadratic optimized algorithm with differentiation between processing trade and general trade to arrive at various indicators of foreign value-added ratio that reflect the level of global value chain embeddedness. On this basis, the panel econometric model for 27 manufacturing sectors of China between 2001 and 2010 is employed to test the effect of foreign value-added ratio on the technology sophistication of manufacturing export. Our research indicates that by taking part in division of labor in the global value chain and acquiring foreign intermediate inputs, China's manufacturing sector has increased its export technology sophistication. It also indicates that, compared with such inputs as raw materials and parts and components, service input has great contributions to technology improvement. With the direct contributions of foreign value-added under control, the foreign value-added from developed countries has a restrictive effect on the R&D activities of export manufacturing, which gives rise to the one-way technology reliance on dominant enterprises of the value chain and the "low-end lock-up" effect; meanwhile, the method of embeddedness that takes advantage of the foreign value-added of other countries is more dependent on the indigenous R&D capacity of export enterprises and thus more favorable to the improvement of export technology sophistication. 展开更多
关键词 global value chain foreign value-added export technology sophistication vertical professionalization
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