查询词典 depth of field

In absorptive PS, light field attenuates rapidly with the increase of depth and extinction coefficient.

在线性吸收的PS中光强随光进入介质的厚度及消光系数的增加迅速衰减。

Uses method which the field investigation sample and the indoor analysis unify, 2007-2008 years live the unicast awnless brome lawn and the awnless brome and the alfalfa interlacing in the Inner Mongolian nationality university agriculture school test farm take 2 years mix broadcast the lawn and the colleague mix broadcast the lawn as the objects of study, have studied under the different sowing seeds way the forage grass to the soil physics and chemistry nature influence, finally indicated:the change tendency which under the different sowing seeds way increases the soil bulk specific gravity overall along with the soil layer depth to present after reduces first increases, is the 10-20cm soil layer is lowest; Looking from the 0-40cm soil layer's mean value, the unicast awnless brome lawn soil bulk specific gravity is smallest, the colleague mixes broadcasts the lawn soil bulk specific gravity to be biggest.

科尔沁草原是典型的农牧交错地区，长期以来，由于不合理利用草地资源造成该区生态环境严重恶化，农牧业生产受到严重影响[1]。建立高产优质的人工草地是解决我国高寒地区草畜供求季节不平衡的矛盾，促进草地畜牧业持续发展的关键措施之一[ 2]。无芒雀麦和紫花苜蓿都是营养价值高、适口性好、抗寒抗旱能力强的多年生牧草。将这两种牧草混播不仅能提高牧草产量和品质，延长草地使用年限，还能改善牧草的营养，提高牧草的适口性，有利于调制和青贮[3]。

This dissertation, based on (1) field investigations and observation along Jiangsu coastal environment (including: sea bottom and tidal flat sediment sampling, water depth, salinity, current velocity and direction, core drilling and so on);(2) integrative laboratory analyses of micropalaeontology, sedimentology and computer-processed mathematical statistics on over 300 samples and about 100 thousand foraminifera tests, try to find and formulize the relations between foraminiferal thanatocoenose and environment.

本文的写作基础是：通过野外进行的海岸环境调查和测量（主要调查项目有：水深、盐度，流速、流向、含沙量、底质采样、浅地层地震剖面仪探测、潮滩钻孔取样、潮滩探槽的挖掘与沉积物取样、观测等等）取得了环境参数和大量样品；在实验室运用微体古生物学、沉积学、数理统计与计算机分析相结合的方法，对所采集的现代表层沉积物和钻孔岩芯样品共计三百多个进行了分析研究，鉴定统计有孔虫标本十万余枚，研究有孔虫埋葬群特征与环境参数之间的定性-定量关系。

This one-way wave equation fits eikonal equation and transport equation corresponding to full acoustic wave equation in travel-time and first order amplitude. According to the perturbation theory often used in inverse solution, we split the velocity field into intraformational constant velocity background and variable velocity disturbance. Then we calculate time-shift quantity of migration and amplitude correction coefficients for wavefield depth continuation in total uniform formation and each formation.

基于反问题求解中常用的摄动理论，把速度场分裂为层内常速背景和变速扰动，求得整个均匀层波场深度延拓的偏移时移量及振幅校正系数、各层的偏移时移量及振幅校正系数，从而得到一个基于傅里叶有限差分法的双域保幅叠前深度偏移算子方程。

However, due to the unmature development of technical standard and development tools, many research works in this field focused on buliding concept models and studying algorithms, while unable to do some in-depth works to answer such questions as how to design, develop, and implement a Multi-Agent application system.

因此，我们希望通过实际开发一个 Multi-Agent的供应链管理系统，掌握一套开发 Multi-Agent 应用系统的方法；同时站在业务运作的高度，从系统分析与设计的角度，具体考察 Multi-Agent 系统应用于企业供应链管理的可行性与有效性。这一次的尝试，也为今后 Multi-Agent 系统在企业中的具体应用提供一些经验与教训。

Compared with the other migration methods, reverse-time migration is based on the accurate wave equation but not its approximate formula and extrapolates wave field along time axes instead of depth axes.

与其他偏移方法相比，逆时偏移基于精确的波动方程而不是对其近似，用时间外推来代替深度外推。

The results showed that little water consumption of radish field came from ground water table at 3m depth; 25.79mm and 71.78mm came from 2m and 1m depths respectively.

结果表明，3m以下潜水对菜田耗水极少贡献；2m与1m潜水位菜田潜蒸水可有25.79mm与71.78mm，对萝卜旱作生产具重要作用。

In the sub-micron process,the electrical field in the drain increases significantly with the decrease of the gate oxide thickness, the channel length and the junction depth. As a result,HCE exerts a more important impact on device's life and reliability.

在深亚微米的工艺条件下，随着栅氧厚度、结深、沟道长度的减小，漏端最大电场强度增大，热载流子效应的影响变大，它对器件的寿命、可靠性等有很大影响。

Field data processing examples show that sub-images of vugs and fractures can be correctly separated from original FMI data continuously and automatically along the depth axis. The image segmentation lays the foundation for in-situ parameter calculation.

实际资料处理表明，应用这种方法可以从实际的FMI资料中准确地分割出孔洞、裂缝的子图像并且可以按深度段连续自动处理，为后续定量计算参数奠定了良好基础。

By means of numerical simulation in different heat conduction processes,the steady-state temperature field in upper arm skin tissue,the temperature distribution and the burn depth threshold after 15 s exposure to a heat source at 90 ℃,the su...

通过数值模拟，获得了不同皮肤组织结构模型下上臂皮肤组织内的稳态温度场和90℃高温热源作用15 s后皮肤组织内的温度分布，以及皮肤组织热损伤深度的变化、常热流作用下皮肤组织表面的温升曲线和表面绝热条件下皮肤组织内的稳态温升分布。研究结果表明，皮肤组织的多层传热数学模型更能真实地描述皮肤组织内的传热过程，因此值得在实际工作中推广应用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。