排序方式： 共有44条查询结果，搜索用时 62 毫秒
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GIS在公路路线设计中的应用 总被引：6，自引：0，他引：6
简要介绍了公路路线设计,就地理信息系统（ＧＩＳ）在公路选线、路线平面设计、路线纵断面设计、路线横断面设计及其他方面的应用作了初步探讨．试验表明,ＧＩＳ在公路路线设计中是大有可为的 相似文献
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耿国纪 《合肥师范学院学报》2012,30(4):116-121
日本当代作家大江健三郎,因其作品“通过诗意的想象力,创造出一个把现实和神话紧密凝缩在一起的想象世界,描绘出现代的芸芸众生相,给人们带来了冲击”而获得了诺贝尔文学奖.透析大江文学独具魅力的诗化文本语言,解构贯穿其文本语言符号系统中具有普遍意义的“结构”——纵、横轴,以引发本国读者及相关研究者对外国文学创作文本及理论的思考. 相似文献
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车牌定位技术是车牌识别技术中最重要的部分,根据车牌区域字符的特点,提出了一种综合纹理分析和梯度特征的车牌定位方法.利用车牌字符的纹理特征提取出可能存在车牌的区域,再利用车牌字符和背景梯度的差异性进一步过滤掉由于背景原因产生的伪车牌区域,进而准确定位出真正的车牌区域.实验结果表明该方法运算量小,对复杂背景车辆图像有很好的定位效果,具有较好的应用性. 相似文献
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Systems integration encompasses both system design and management of supplier networks. We examine the “second face” of systems integration related to the organization and management of supplier networks. We analyze a unique dataset on the supply chains for three major U.S. weapon systems to examine how systems integrators balance the economies-of-scope benefits of general-purpose technologies and the benefits of horizontal supplier specialization. We show that horizontal specialization – an establishment’s focus on a particular market – differs with distance from the systems integrator. Systems integrators derive the benefits of specialization primarily (though not exclusively) from their direct suppliers, and they access general-purpose technologies from lower-tier suppliers. Some of the lower-tier suppliers themselves integrate complex subsystems, belying the image of the supplier network as a “production pyramid” with simple firms at its base. We further find that the supply chains of the three weapon systems that we study are dominated by facilities whose main line of business is in non-defense markets, because of the large number of lower-tier suppliers that serve commercial markets. This demonstrates the importance of the supply chain as a source of commercial-military integration, linking defense production to the wider economy and casting doubt on the view that there is a “wall of separation” that prevents the U.S. defense effort from gaining access to civilian technologies. 相似文献
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李宗璞 《临沂师范学院学报》2003,25(3):140-142
Visual Basic6．0中的组合框和列表框不能支持超过可见区域的长串项目的显示，介绍了提高其可读性的几种技术．一种是利用工具注释文字来显示组合框和列表框项目；另一种是使用个别的API函数． 相似文献
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We go beyond previous studies of vertical inequality in Ethiopia, by investigating ethnic group-based, or horizontal, educational inequality. Currently, there are no known studies of differential schooling patterns across cultural groups in Ethiopia. The research draws on the Young Lives prospective longitudinal study of 929 children in later childhood. We investigate the extent to which ethnic group differences in schooling participation and progression can be explained by individual differences in socio-economic status. The findings show that poor educational participation and progression remain challenges for certain minority ethnic groups. Household wealth helps to explain the effect of ethnicity on educational outcomes. However, it cannot fully account for the ethnic gap. We conclude that conventional research, which emphasizes addressing individual differences in educational outcomes, or vertical inequalities, may downplay the role of cultural group-based inequalities in children's opportunities to learn. 相似文献
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郑芳燕 《宁波广播电视大学学报》2012,(3):28-32
选取具有一定可比性的工商银行和中国银行作为样本,以盈余质量为切入点,定量评价了盈余的持续性、结构性、变现性、成长性和获利性这五大本质特性,再通过横向比较、纵向比较以及综合评价后发现,两家银行盈余质量的结构性较好,其中工商银行的盈余质量要优于中国银行。但工商银行核心盈余增长率的变异系数最大,核心盈余的增长不够稳定;而中国银行核心盈余现金保障率的变异系数最大,需要关注其变现能力。 相似文献
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《Infancia y Aprendizaje》2013,36(2):189-210
ResumenSe estudia, en niños de 7 a 13 años, el desarrollo del conocimiento del planeta Tierra y la relacián entre la comprensián científica de este conocimiento y tres capacidades espaciales: coordinacián de perspectivas espaciales (CPE), elaboracián de un sistema de referencia geométrico (SRG) y reestructuración perceptiva (RP). Para evaluar las concepciones del planeta tierra se diseñó una entrevista estructurada de aplicación individual. La CPE se evaluó con las Tres Montañas, la elaboración de un SRG con la Horizontal de los Líquidos, y la RP con Tests de Figuras Enmascaradas. Un análisis cualitativo de las respuestas a la entrevista revela cinco concepciones del planeta Tierra que se clasifican en tres categorías: concepcián basada en datos aparentes del medio físico, concepciones que articulan estos datos con conocimientos culturales y concepcián cultural o científica. La distribucián de frecuencias de los niños en las distintas concepciones indica que existe un desarrollo de este conocimiento relacionado con la edad. Los resultados sobre las relaciones entre las concepciones del planeta Tierra y ejecución en las pruebas espaciales confirman la correlación entre las capacidades espaciales que evalüan estas pruebas con la comprensián científica de este conocimiento. 相似文献