direction field

The direction field of a first order ordinary differential equation in CAI

在CAI中，一阶微分方程dy/dx

Based on this fact , we proposed a new quality evaluation index based on direction field information .

针对这一现象，作者提出了一个新的基于方向场信息的质量评价指标。

Improved Algorithm for Fingerprint Direction Field Estimation

一种改进的指纹纹线方向场的计算方法

We know that the real direction field is continuous . However , the wrong direction we get due to the low quality is clutter and discontinuous .

真实的方向场是连续的，但是，由于低质量图像的影响而提取出的错误的方向场信息是杂乱不连续的。

This paper introduces an improved algorithm for fingerprint direction field estimation , the rotation angle estimation during constructing the singular point models is analyzed in details .

本文提出了一种改进的指纹纹线方向场计算方法，其中重点分析了奇异点模型中旋转角度的估计方法，并在复数域内简化了纹线方向场的优化计算。

Based on the feature of anisotropy of machining width on the local of the free-form surface , a tool-path planning method of optimal cutting direction field is given .

同时，基于复杂曲面加工的局部各向异性特征，给出了一种具体的基于最优切削方向场的刀具路径规划方法。

Provide technical direction for field activities .

为场地活动提供技术指导。

The appearance of enterprise RBT has exploited new research direction and field for strategic management .

企业资源基础理论的出现为战略管理开拓了新的研究方向和领域。

Axial Direction Diffracted Field Analysis of Circular Aperture with Vertical Incidence of Spherical Wave

球面波垂直入射下圆形口径面的轴向绕射场分析

A method for verifying the formula to analytically calculate the direction of field intensity gradient by complex potential function

由复势函数解析计算场强梯度的公式及其证明

According to the influence of the perpendicular direction magnetic field upon the optical magnetic resonance signal , the perpendicular terrestrial magnetic field are measured .

文章根据垂直方向磁场对光泵磁共振信号的影响，来测定地球磁场的垂直分量的大小。

This research deepened our understanding of fracture initiation mechanism and can be used for further research as well as direction of field fracturing practice in theory and technology .

通过本文的研究加深了对水力压裂造缝机理的认识，为进一步分析水力压裂造缝机理和指导现场压裂施工提供了理论指导和技术支持。

It exhibits that : ( 1 ) The partings on research method and content have become less distinct . A new research direction of field investigation to appraisal process has emerged ;

表现为：（1）在研究方法和研究内容上的分歧已不太明显，出现了在现场调查中研究评估过程的新的研究方向；

Sum up the knowledge characteristics of inter-organizational network , direction and field . Direction of work includes process-oriented and content-oriented work . Field of work includes key field and extensive field .

同时总结跨组织网络的知识特性，分为方向性和领域性，方向性包括过程导向型的工作和内容导向型的工作，领域性包括重点领域型的工作和广泛领域型的工作。

Therefore , the direction of field ridge in Heibei Bashang region is suitable with 90 ° to NW ( natural wind direction 315 °), that is the direction in NE ( 45 °) .

为减轻土壤风蚀危害，在河北坝上地区农田起垄的方向宜采用与自然风向NW（西北风向，315°）成90°，即东北方向45°。

Finally , based on summing up the theory and practice of the of research achievements , this paper points out the shortage and limitation of the point in the course of research , which provide the direction and field for follow-up research work .

最后在总结全文理论与实际应用的研究成果基础上，指出本文在研究过程中存在的局限性与不足之处，为后续的研究工作提供了拓展的空间与改善的方向。

The magnetic field characteristics of repulsive magnetic pole system are presented and a new method for determining the working points of magnets in counter direction magnetic field is described , which provides a short cut for designing the rare earth magnetic separators with repulsive magnetic poles .

描述了排斥磁极磁系的磁场特性，介绍了逆向磁场中磁铁工作点确定的新方法，为稀土永磁排斥磁极磁选机的设计提供了一条捷径。

When the current profile of an arc column has a parabolic distribution , in the short wavelength perturbation case , the effect of positive direction magnetic field on the arc stability is very small . However , its stabilizing effect is enhanced for the long wavelength perturbation .

当弧柱内电流为抛物线形分布时，外加正向磁场对于短波情况下的稳定性影响很小，但对于长波情况，稳定性增强；

Measuring microwave ECR ( electron cyclotron resnance ) plasma parameters with a double-probe , the author discovered that a large-section uniform plasma soure is deeply dependent on the axial direction magnetic field gradient , the plasma parameters are also influenced by the gas pressure .

利用双探针测试了微波ECR等离子体参数，发现获得大面积均匀等离子体源强烈依赖于轴向磁场梯度，等离子体参数受气压影响亦很大。

Heuristic algorithm becomes an important direction in this field .

因此，用启发式算法求解该问题就成为人们研究的一个重要方向。

The presented method represents an important research direction in the field of efficiency assessment .

这种方法将是效能评估研究领域的一个重要研究方向。

Some suggestions are made for the researching direction in this field .

最后对此课题的研究方向提出了几点建议。

Fluxgate technology is applied to measure direction and magnetic field .

磁通门技术应用于工程当中，主要为方向测量和磁场强度测量。

The study of the intelligent control method is an important research direction in the field of robot control .

智能控制方法研究是机器人控制领域的重要研究方向。

Clustering is an import an t research direction in the field of Data Mining .

聚类是数据挖掘领域的一个重要的研究方向。

Mobile Robot Mapping is an important research direction in the field of robot navigation .

移动机器人地图构建是机器人导航领域的一个重要研究方向。

Geological disaster assessment is one of an important research direction in the field of geological engineering .

地质灾害评估研究是地质工程领域的重要研究方向之一。

Metal Rubber sealing technology research is an important direction in the field of metal rubber .

金属橡胶材料密封技术的研究是金属橡胶技术研究领域的一个重要方向。

Infrared imaging guidance has been an important development direction in the field of precision guidance .

红外成像制导已成为精确制导领域的一个重要发展方向。

Therefore , to research more intelligent visual surveillance system has become the main direction in this field .

因此，研究更加智能化的视觉监控系统是未来的主流方向。