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Based on the review of evaluation indices, water quality standards and evaluation methods used in present groundwater quality evaluation, several aspects that should be focused on were suggested for the future development of groundwater quality evaluation
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摘要在对地下水水质评价的评价指标与水质标准、地下水水质评价方法进行综合评述的基础上，指出应加强有关地下水水资源保护法律法规的建设，加快水质标准的更新和修订速度，改善水质评价方法，充分利用GIS的技术优势是未来进行地下水水质评价过程中值得注意的方向。 |
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Based on the review of petroleum exploration in the south margin of Junggar Basin in the past half century, the difficulties of piedmont exploration in different phases are summarized as follows: complex structures: large variability in reservoir quality
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摘要通过对准噶尔盆地南缘半个多世纪的油气勘探历史回顾，确定了山前勘探各个阶段所面临的主要难点：构造存在多解性、储层质量变化大与规模难以预测、高陡构造地震处理准确偏移成像难度大、钻井技术要求高。 |
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Based on the review of the evolutions of stock indices and the innovations of index products, this article discussed the different methods of index replication, and then sum med up those researches on different methods, arithmetic models and their implica
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摘要在回顾证券价格指数演变及指数衍生品创新的基础上，探讨了指数复制的不同方法，进而从文献综述的角度对证券价格指数复制中涉及到的方法与算法模型进行整理，总结了二次规划、线性规划、鲁棒回归、蒙特卡洛模拟以及遗传算法等不同方法与模型的具体应用，为指数衍生品产品设计、指数套利以及实施指数化投资策略提供技术参考。 |
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Based on the rich Fastener manufacture expcrience,the group provides complete service of design,manufacture special products accordance with your Specification,Qunli Screw-being sincere forever!
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公司积丰富的紧固件制造经验，集开发设计，制造、贸易服务于一体，可代为用户设计、制造各种特殊和异形紧固件。“群力”螺丝——真诚到永远。 |
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Based on the rigorous coupled wave theory, the phenomenon that the zero order reflection efficiency of rectangular subwavelength grating varies with the wavelength is studied when incidence angle, azimuth and grating parameters are variant.
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摘要从严格耦合波衍射理论出发，在不同入射角、方位角和光栅参数下的情况，计算了矩形亚波长光栅零级反射效率随入射光波长的变化。 |
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Based on the river regime of TGP dam area and the arrangement of upper and lower access channels, the experimental research on the influence of such unsteady flow on the navigation, the evaluation of navigable conditions under the unsteady flow and the st
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本文结合坝区河势特点及上下游引航道布置，试验研究了大坝泄洪及船闸充泄水非恒定流对上、下引航道通航影响，同时进行了非恒定流通航条件评价及改善措施研究。 |
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Based on the robot task, a kind of obstacle-navigation control method is presented which takes the information of sensors and constraints and the feedback of movement as input and the production system as output.
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根据机器人的作业任务，提出了基于传感器信息、约束信息以及动作反馈信息作为输入，产生式系统作为动作输出的越障控制方式。 |
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Based on the role of difference technique in electric water prospecting, this paper has proved that the numerical algorithm is of some reference value in data processing and improvement of signal-to-noise ratios.
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摘要结合差分法在电法找水中的作用，实践证明数值计算方法对资料处理、提高资料的信噪比有一定的参考价值。 |
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Based on the role of journal of higher school, the author expounds the function of journal s editor in bringing forth the achievements of academic scientific research and teaching to the society, and further analyzes the role of journal's editing staff in
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摘要从高校学报的作用出发，说明学报编辑在把高校科研成果、教学成果向社会推介时的作用，从而分析学报编辑人员在教学科研活动中扮演的角色：学报编辑是创造性智力劳动的从事者－设计师与制作师；是特殊之师―人师之师；是知识广博的专业人才－学者与专家。 |
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Based on the roller-compacted test, check on construction and observation during operation, the fill-criteria of the design for the dam is obtained, and then the economic and reasonable roller compacted method, including selection of the roller, mechanica
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摘要通过碾压试验、施工复核及大坝运行观测，得到了大坝的设计填筑标准，从而确定了经济合理的压实方法，包括压实机械选型、机械参数、砂砾料加水量等。 |
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Based on the rough set theory, using the entropy to eradicate the redundancy properties, the corresponding arithmetic has been designed and realized, a relatively reasonable IC engine state evaluation index system has been constructed.
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基于粗糙集理论提出运用信息熵对内燃机的状态评估特征参数进行约简，进行了相应的算法设计与实现，建立了一个相对合理的内燃机状态评估指标体系。 |
