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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
truncatum) females find an "apparently suitable" waterway in which to oviposit; this may or may not be their natal site.
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Analysis of the free-surface profiles of flow in parabolic waterway channels with two-sided diversion
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Investigation of the effect of geometric parameters of turbine waterway elements on the structure of an axisymmetric inviscid fl
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1.A microcomputer-based MCC was developed which makes it possible directly during a physical experiment to obtain estimates of the statistical characteristics of pressure fluctuation processes in the waterway of turbine-generator unit blocks.
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Increasing human impact, such as dam construction, deforestation, agricultural related activities, and the Hidrovia project in the Parana-Paraguay waterway, threaten the ecological stability of the Pantanal area.
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| | Since 1920's the system science has provided a new theory and method for the mankind to study the system control and optimization. According to this theory, a multi-function system must contain many sub-systems which are independent, interrelated, restricted and coordinated. Optimization in the sub-system does not mean that in the general system. So, in order to realizing the optimization of the general system, restriction is necessary to study and make coordination, analysis among the sub-systems. Besides,... | | 自本世纪二十年代迅速发展起来的系统科学,为人们研究系统控制和优化提供了崭新的理论和方法。系统理论认为,在一个多功能的大系统中,必有许多互为依存、相互关联的子系统,彼此间形成协调和约束。子系统最优不一定是大系统最优。因此,需要通过子系统之间的协调和约束,对系统进行综合分析,分级优化,系统论证,实现大系统的最优。从船型论证出发,逐渐扩展研究范围,将运输船舶与港口、航道等水运工程系统联系起来,构成船型宏观论证的大系统,并以此确定本文研究的边界。本文试图用系统理论分析研究港口、航道、船舶三个系统之间的相互关系,在众多复杂因素中,选取每个系统的一项或几项主要参数作为系统之间的协调变量,寻求一种系统优化的方法。按有关部门对宏观技术经济评价的要求,在效益与费用评价之中,选取在完成一定货运量下使系统投入最少为本系统研究中的目标。以工程经济理论和大系统理论为指导,完成系统的物理模型到数学模型的转化。通过分级优化技术寻优,初步得到满意的结果。 | | 文摘来源 | | The characteristics and methodogy involved in the long term planning and prediction of highway and waterway are briefly presented in the paper and the correlation between the national economy development and the freight volun1e is probed and put forward so as to facilitate the freight volume prediction of highway and waterway by the years of 2020. | | 本文概括地介绍我国公路、水路运量长期规划的特点与方法,并提出社会经济发展与运量之间的内在规律,预测我国2020年宏观前景。 | | 文摘来源 | | The shipping and navigation through the Qiantang River to sea is of great significance to Zhejiang's economic development. In view of the geographic feature of the waters, it is imperative to take comprehensive measures of multi-disciplines. Discussed here are four main measures in the respects of. namily, waterway, ship model, management, and administration and navigation, with establishing a navigational and positioning system and improving its accuracy as a key link between the four. Three points a... | | 钱塘江通海航运对浙江省的经济开发具有重要意义。根据该水域的地理特征.通海航运务必采取多学科的综合措施,主要有航道、船型、运营和导航等四个方面,其中建立导航定位系统并提高其精度是通海航运的基础环节。作者对钱塘江河口的地理特征、钱塘江通海航运开发的若干措施和钱塘江通海航运的导航等方面进行讨论,供宏观决策参考。 | | 文摘来源 | |   | | << 更多相关文摘 |
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