查询词典 gradient of scalar field

In low permeability boundary oil field, applying this technology can make the field development to be profitable. In Changyuan Oii field, this technology can save a great deal of natural gas, which has significant importance to the extension of field development life and increment of EOR.

在外围低渗透油田中采用常温和低温集油化学剂技术，可使低产区块的开发由经济上不可行变为可行；在长垣油田应用低温和常温集油化学剂技术，可节约大量的天然气，这对延长油田开发周期和提高原油采收率具有十分重要的意义。

The seasonal reversion of flow field can be divided two parts,they are the reversion of barotropic flow field and baroclinic flow field,accoding to the reversional strength of barotropic and baroclinic flow field.

引言经典季风学说认为由海陆热力差异以及其它加热不同所造成的冬夏季对流层低层盛行风向的显著转换是季风形成的根本原因，并根据地面风向的冬夏季转换确定了季风区[1]。

The field survey, sampling, testing and collection of the geological and hydrogeological data were done for the description of evolutional geological structure and sedimentation and division and definition of water-bearing system and hydrogeological age and hydro-pressure system and study of the vadose field and chemical field. By establishing the rammer numerical model, the sandy mudstone thickness recovery model, water-rock interaction particle translative simulation and hydrogeochemical simulation, and using geological statistics, analogism and complex analysis method, water circulation and water exchange of each layer in each study stage have been researched, The results show the regularity of the vadose field evolution in different stages.

本项以野外调查、采样测试和搜集的地质、水文地质大量第一性资料为依据，在论述盆地的地质构造演化、沉积演化的基础上，以含水系统、水文地质期和水压系统类型的划分和定位为研究的切入点，渗流场、化学场为研究主线，通过建立压实数学模型、砂泥岩恢复厚度数学模型、水岩作用物质成分转移的实验模拟、水文地球化学模拟、地质统计法、类比法、综合分析法等方法，模拟计算了各研究层在各研究时期水循环特点和水交替强度，揭示了各研究层渗流场在地史进程中形成演化的规律性。

By Ensemble-averaged Method, the mean field was got to show the 3D structure of flow. By Phase-locked Averaged Technique, the periodic mean field was got to reflect the periodic unsteady characteristic. The 3D structure and the periodic unsteady characteristic of the unsteady flow within the vaneless and vaned diffuser were discussed through analyzing the mean field and the periodic mean field.

离心风机扩压器内非定常流动的实验研究本文完成了离心风机两种结构条件下无叶扩压器、有叶扩压器内部的非定常流动瞬态全流场的实验测量，获得了不同运行工况下PIV的瞬态流谱，为研究扩压器内部非定常流动提供了基础实验资料。

In this paper, we discuss fidelities and fidelity amplitudes for some models including single-mode field interacting with atom system, two-mode field interacting with atom system, field interacting with atom by multiphoton process system and binomial field interacting with atom system and find some meaning result.

文章中具体研究了单模光场与原子相互作用系统、双模光场与原子相互系统、多光子过程与原子相互作用系统以及二项式光场与原子相互作用系统的保真度的演化特性，以及部分模型的保真度振幅的演化特性，并得出了许多有意义的结果。

Based on the oil field practice of air drill ing applications in karamay oil field, the author summarizes and analyses air-fogged drilling informations at home and abroad, provides a set of air drill ing designing rule applicable to karamay dil field, and compiles the computor soft-ware of air drill ing parameter design guiding field operational practice.

以克拉玛依油田应用空气钻井的现场实践为依据，总结、分析国内外空气雾化钻井资料，提出了一套适合于克拉玛依油田的空气钻井设计原则，用来指导现场实践的空气钻井参教设计的计算机软件。

This paper introduces the structure, especially the technics of armature winding and the way of arrange method of the motor. Based on it, the physical and mathematical model of the armature magnetic field was found. Then making use of the FEM to compute and analyze the armature magnetic field. At last, the influence of the armature magnetic field to the main field is discussed.

本文通过对此种电机结构，尤其是电枢绕组工艺及盘列方式的简单介绍，建立了盘式无铁心永磁同步电机电枢磁场的数学模型和物理模型，并利用有限元数值计算方法对电枢磁场进行计算，分析了此种电机电枢磁场的分布情况以及它对主磁场的影响

The experiments were carried out to calibrate FDR in the lab and field, and calibration equations were verified by oven-dried method for soil samples obtained by augers. The result showed that good calibrating equations with average RMSE 0.023 m^3/m^3 were fitted in the lab, but they had poor RMSE 0.066 m^3/m^3 when used in the field. Other calibrating equations with average RMSE 0.026 m^3/m^3 were also fitted by indirect field calibration method, and they had good RMSE 0.026 m^3/m^3 when used in the field.

结果表明，室内试验获得了较好的模型参数，均方根误差平均达到了0.023 立方公尺/立方公尺，但是应用到田间条件下误差很大，均方根误差平均为0.066立方公尺/立方公尺；田间条件下也间接获得了较好的模型参数，均方根误差的平均值为0.026立方公尺/立方公尺，应用于田间时测定含水量的精确度较高，均方根误差的平均值为0.026立方公尺/立方公尺。

The paper analysed stress and strain field including the effect of rock dilatancy and fault creeping in earthquake preparation, according to coupling equation of stress and pore pressure field, the pore pressure field variation along with stress field can be calculated.

本文在研究孕震过程中包括扩容和断层蠕变效应在内的应力应变场的基础上，根据应力场与孔隙压场的耦合方程，把孔隙压场随应力场的变化定量地计算出来。

A field coil driver uses a dedicated power supply to feed its field coil to produce the strong magnetic field that makes the diaphragm react to the incoming electrical signals and reproduce sound, the stronger the magnetic field the more efficient the driver would be and the higher and lower frequencies it will respond up to the diaphragm physical and acoustical limits.

实地线圈驱动器采用专用电源给其外地线圈产生的强磁场，使膈肌反应传入的电子信号，并重现声音，强大的磁场更有效地将司机和更高和较低的频率，将应对行动膈肌物理和声学限制。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。