查询词典 Jacobi method

Focusing on the interaction among the screws,the paper analyzed the current method of determining propulsive factor based on ship s self-propulsion test with three-screw and presented a new method to test and analyzed propulsive factor of ship with multi-screw.

针对多桨船螺旋桨间互相干扰的影响，通过对三桨船自航试验推进因子分析方法进行分析探讨，提出新的三桨及以上的多桨船船模自航试验方法和其推进因子分析方法。

By combining hydrological method and chemical method, the sea area self-purification to copper was calculated.

本文还实现了水文和化学相结合研究得出了整体海口湾海域铜的自净能力。

The identified two orders models under three different load conditions are validated by step disturbance method and self-relation function method.

对所得三种不同负荷水平下的二阶离散型水轮机模型，应用阶跃扰动法和自相关函数法进行检验。

The traditional query tree optimization methods,parallel database optimization methods based on left linear trees and right linear trees,bushy trees,and operation of the forest,have their own pros and cons,they have been more in-depth and maturity of the study.The query optimization method based on multiple weighted tree has studied its model of parallel query plan,its complexity model of parallel query plan and query optimization algorithms.The semantic query method transforms an inquiry into one or several semantic equivalence inquiries then has to find and implement a strategy to achieve a better query.Agent-based parallel database query optimization using Multi-Agent technology to automatically search the integrity constraint conditions which are related to the determined query,there for,the efficiency between several relations' joins has been greatly improved.The parallel optimization algorithm,based on genetic algorithm which is suitable for multi-joins of cluster environment,has deeply studied the relations storage options,multi-joins query optimization and query processing and other key technologies based on cluster parallel database.

传统的查询树优化方法，即基于左线性树、右线性树、浓密树、操作森林的并行数据库查询优化方法，各有优劣，对其的研究比较深入、成熟；基于多重加权树的查询优化方法，研究了其并行查询计划模型、并行查询计划的复杂性模型和查询优化算法；语义查询优化方法将一个查询变换成一个或数个语义等价的查询，进而寻找并执行这些等价查询中具有较好实现策略的一个；基于Agent的并行数据库查询优化采用Multi-Agent技术自动查找与给定查询有关的完整性约束条件，使得多个关系间连接操作的效率得到很大的提高；基于遗传算法的并行优化算法，深入研究了基于机群并行数据库中关系存储的选择、多连接查询优化和查询处理等关键技术。

We adopted the spectrum analysis method and the BAYTAP_G method to analyze the geoelectric potential data at the Niijima station during 1998～2000 After the quantitative analysis of the tide response of geoelectric potential changes at the above station, we obtained some main characteristics of the tide response. Besides the tidal components with various periods such as diurnal tide, semidiurnal tide, and so on, semimonthly and semiyearly variations of tide response were also detected from the geoelectric potential data at the Niijima station.

本文通过采用频谱分析和BAYTAP-G方法对位于日本伊豆群岛的新岛台跨度达三年（1998～2000年）的地电场的观测资料进行了分析研究，对该台地电场的潮汐响应进行了定量提取与分析，得到了地电场潮汐响应的一些主要特征，例如除了存在全日分潮、半日分潮等不同周期的潮汐成分外，还呈现出明显的半月、半年等不同周期的活动规律。

We adopted the spectrum analysis method and the BAYTAP-G method to analyze the geoelectric potential data at the Niijima station during 1998~2000. After the quantitative analysis of the tide reaponse of geoelectric potential changes at the above station, we obtained some main characteristics of the tide response. Besides the tidal components with various periods such as diurnal tide, semi-diurnal tide, and so on, semimonthly and semi-yearly variations of tide response were also detected from the geoelectric potential data at the Niijima station.

本文通过采用频谱分析和BAYTAP-G方法对位于日本伊豆群岛的新岛台跨度达三年（1998~2000年）的地电场的观测资料进行了分析研究，对该台地电场的潮汐响应进行了定量提取与分析，得到了地电场潮汐响应的一些主要特征，例如除了存在全日分潮、半日分潮等不同周期的潮汐成分外，还呈现出明显的半月、半年等不同周期的活动规律。

This method was used successfully in Lake Chaohu, Anhui, drainage area in 2005 flood season. It can be approved that the method is effective to identificate waterbody under semitransparent cloud.

以2005年汛期时巢湖水体为例，得到了较好的结果，并对实验结果进行了分析，证实了此方法用于薄云下水体识别的有效性。

Based on the spectral characteristics of underlying-surface and the principle of satellite observation, a simple and effective method for waterbody identification using MODIS data is put forward, which is the ratio band of channel 2 by channel 1. The effect result of waterbody identification in the ratio image can be obtained. Using this method, water can be identified not only in cloud-free areas, but also under semitransparent cloud.

根据地物光谱特征和卫星信号接收原理，提出了一种利用MODIS气象卫星识别水体的简单而有效的方法，将卫星2通道与1通道进行比值计算，在得到的比值图像中不仅无云晴空下，而且薄云覆盖下的水体都有着较好的识别效果。

Ln this paper, a new learning method is presented which is based on analyzing a set of linear separable structures. The most important benefit of this method is all binary neurons belong to one or more types of linear separable structure sets. If those linear separable structure sets have clear logical meaning, the whole knowledge of binary neural networks can be dug out.

该文提出了一种基于线性可分结构系结构分析的学习算法，采用这种方法对布尔空间的样本集合进行学习，得到的二进神经网络隐层神经元都归属于一类或几类线性可分结构系，只要这几类线性可分结构系的逻辑意义是清晰的，就可以分析整个学习结果的知识内涵。

A method was developed for the towage resistance calculation of BFP with special structures, i. e. separate the resistance into wind pressure resistance, underwater shape resistance and underwater friction resistance. The comparison between calculation and towing model test indicates that this method is accurate.

发展一种适合于计算特殊结构桶形基础平台拖航阻力的方法，分别考虑风压阻力、水下形状阻力和摩擦阻力；与平台拖航阻力模型试验结果的比较表明，该方法具有较高的精度。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。