查询词典 function field

In the magnetic fluid magnetic particle even distribution does in the liquid does not have the rule the Brownian movement, after sur- is parallel to the optical transmission direction gradient magnetic field, as a result of the magnetic field and the magnetic particle mutual function, the optical transmission rate can have the remarkable change.

磁性液体中的磁性微粒均匀的分布于液体之中做无规则的布朗运动，当外加1个平行于光透射方向的梯度磁场后，由于磁场和磁性微粒的相互作用，光透射率会发生显著变化，同样加垂直光路的磁场也会影响其光透射率。

The probability distribution function G of particle number N^＋ is deduced on the basis of the Canonical partition function Z of an ideal Fermi gas（ The orbital motion of the fermi- ons is not considered） in weak magnetic field.

根据弱磁场中理想费米气体的正则配分函数Z，导出粒子数N＋的几率分布函数G。

He explored the social function of China's Historical Geography;brought forward the research method of combining literature record with field survey;developed the evolution of geography;set up a monument in the research of environmental changes in the Huanghe Valley;opened up a new field in the research of historical agricultural geogra-phy;unveiled the internal structure of form and evolvement densely-populated areas;settled a base in the research of histo-rical military geography;heightened the research level on the historical cultural geogranhy;made original study on the historical national geography;made systematic study on the issues of transportation in history;made fruitful achievement in the Shaanxi Historical Geography;set up the subject engaged in China's ancient capitals;illustrated the value of chorography;enriched the historical cartology;originated magazines on Chin's Historical Geography;trained a team of research staff in Historical Geography.

他对中国历史地理学史进行了深入研究；发掘了中国历史地理学的社会功能；提出了文献记载与实地考察相结合的研究方法；促进了沿革地理学的发展；树立了黄河流域环境变迁研究的丰碑；开辟了历史农业地理研究的新领域；揭示了人口稠密地区形成和演变的内在机制；奠定了历史军事地理研究的基础；提高了历史文化地理研究的层次；对历史民族地理进行了独到的研究；对历史上的交通问题进行了系统探索；对陕西历史地理的研究取得了丰硕的成果；创立了中国古都学；阐明了地方志的价值；丰富了历史地图学的内容；创办了中国历史地理学的定期刊物；培养了历史地理学的研究队伍。

Having introduced a set of dimensionless parameters, the spatial distributive function of the induced electric field is made dimensionless and is applied to the computation and computer simulation of spatial distribution of electric field induced by a circular coil within half-infinite space.

在确定了一些无量纲参数后，对感应电场的分布函数进行无量纲化，并用于计算圆形线圈在半无穷空间感应电场的计算及其分布的计算机仿真。

On the basis of analyzing the service objectives, items and flow direction of materials and the features of logistics demand, the paper determines the function of logistics park in Shengli coal field and provides how to set up the function.

结合胜利煤田的具体特点，在分析胜利煤田物流园区的服务对象、主要物资品类和流向、物流需求特点基础上，确定了胜利煤田物流园区的功能，并提出了物流园区功能设置的一般思路。

As to the remaining parameters, two methods are developed: first, accepting that the projection function complies with a circular function within at least a part of a given field of view, constrained by the obtained object-to-image radial mapping and a constant focal length, the best-fitting point of the optical origin is tested along the optical axis; secondly, referring to the postulation of the exclusively bilateral mapping between an imaged point and its scenic sight ray, a measuring technique is developed to survey the world coordinates which will fabricate a projecting path to the imaged points located on the imageable region of the image plane in order to directly model the projection geometries involved.

而针对其余参数本文提出两种解题方法：其一是根据『在「部分视野角范围」内，鱼眼相机的投射模型符合一典型的「圆形函数」』以标靶实体与其影像尺寸为限制条件，测试光学轴上的最佳视觉参考点、鉴定最适当的投射模型、焦距、及有效的视野角度范围。其二是根据『一视野线排他性地与对应「呈影点」一一映射』参考一呈影点来搜寻空间中对应视野线的绝对座标后，据以演绎相机内部影像形成的模型。

Since the shape function of EFM is constructed by Moving Least Square Method, the continuity of field function is better than ever.

EFM方法采用移动最小二乘法（Moving Least Square method，简称：MLS）构造形状函数，所得到的场函数连续性好，可以更加真实的反映场的实际分布情况。

In this paper,the boundary singular kernel method in Reproducing Kernel Paicle Method has been applied to impose the essential boundary conditions in EFGM by revising the MLS shape function.The stress field and the displacement field are analysed by linear elastic theory.The contour integral method is used to calculate the J-integral,then the stress intensity factors of mixed-mode crack is acquired.The correctness and the validity of the method are validated.

本文将再生核质点方法中的边界奇异权方法引入EFGM中，通过对MLS形函数进行修正实现了本质边界条件在节点处的精确施加；运用线弹性断裂理论分析裂纹板的应力应变场，采用围线积分法计算J积分，给出了复合型裂纹板的应力强度因子的无网格伽辽金方法。

PSO is a population-based optimization algorithm, which mimics the social behavior of animals in a flock. It makes use of individual and group memory to update each particle position allowing global and local search optimization. The objective function considered was the total weight of the structure subjected to stresses, displacements and forces constraints. The effects of the parameters were investigated as well and such combination of tuning parameters promote a better global search behavior avoiding premature convergence while rapidly converging to the optimal solution. Results showed the effectiveness of the proposed method by comparing with ANSYS Design Optimization Tool (zero-order method). The PSO with the tuning parameters makes it an ideal method for offshore wind turbines foundations optimization tasks.(2) A reliability analysis method for pile foundation bearing axial loads based PSOThe performance function of pile foundation's axially bearing capacity sometimes is nonlinear and complex, on the basis of geometric meaning of structural reliability index, an optimum model with PSO for structural reliability analysis under arbitrary random variables was established, The PSO algorithm is very efficient to solve global optimization problemsIts use in structural reliability field presents not only the advantage of its facility of implementation, but also the possibility to obtain the design point and the failure probability with a good accuracy. In addition, PSO is a zero order algorithm, for no derivative is necessary for its implementation.

本文的研究针对桩式海上风机基础结构的特点，在国内外有关研究成果的基础上对海上风机基础结构优化设计理论和可靠度方法一些相关问题进行了较为深入的研究，具体做了以下几个方面的工作：(1)基于粒子群优化的桩式海上风机基础确定性优化设计方法桩式海上风机基础的优化设计是一个复杂的、非线性约束的优化问题，针对传统的基于梯度信息的优化方法在处理非线性问题中易陷入局部最优解的问题，本文将一种耦合惩罚函数的PSO算法引入到海上风机基础结构概念设计中，PSO算法是从群体动物聚集觅食这一活动中受到启发而发展的，该算法利用个体和群体的信息共享不断改进自身的位置从而进行局部和全局最优搜索，本文中以桩和三脚架连接段直径及壁厚为设计变量，以基础总重量作为优化的目标函数，在给定的约束条件下建立了三脚架基础优化数学模型，另外本文还研究了PSO参数变化对结果的影响，协调的参数组合可以避免陷入早熟收敛而能够快速的获得全局的最优解，通过与ANSYS优化模块的计算结果比较验证了该方法的有效性，本方法为海上风机基础的确定性设计提供了一条有效的途径。

It shows that flow field of vertical vortex is not only the function of the radial coordinate but also the function of the axial coordinate.

运用数值模拟具有能模拟各种不同边界条件的优势，还对非对称来流条件下形成的立轴旋涡进行了模拟。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。