考虑

Considering the technical requirements,the stability andthe steady performance,the quantitative requirement for sampling frequency is present indiscrete control system.Considering that there is a step delay in discrete control in grid on inverter with a Lfilter,the quantitative relationship between critical FCCR and sampling frequency isanalyzed,and the steady performance is analyzed.Considering the technical requirements,the stability and the steady performance,the quantitative requirement for samplingfrequency is present in discrete control system with a step delay.

在L型并电加热管网中，考虑到离散化控制存在滞后一拍的问题时，本文分析并获得了离散PI控制系统稳定范围时闭环根临界频率fnmax和采样频率fs之间的定量关系；针对存在滞后一拍可能引起系统稳态特性下降的问题，分析了PI控制滞后一拍对频域特性造成的影响，综合考虑并网指标、稳定性要求和离散化对稳态特性影响三个主要因素，推导了存在滞后一拍的离散化PI控制对最低采样频率的量化要求。

Theseall make the equivalent-potential model incorrect, which is a correct modelunder low frequency. Otherwise, the methods of segmentation are often used intransient computation. Many scholars ignored the effects of mutual-admittancebetween conductors when doing transient computation for the complexity.

另外，处理地网暂态往往采用分段的办法，如果考虑导体段之间的互导纳，将使计算变得复杂，因此很多学者计算地网暂态特性时往往没有考虑导体之间的互导纳。

How to process it affects the equivalent prediction of the entire conductor performance. According to the traditional composite theory, the following several predictions were carried: only consider the functions of the stainless steel conduit outside the cable body, the double insulation and the double shielding layer; the influence of the flexible cable body is neglect, so only consider the function of its internal helium tube; the material nature of the cable body is assumed the isotropism, which the elasticity modulus is 1-10 GPa (here taking 2 GPa); combining the homogenization theory with the composite damage theory.

在传统复合材料理论的基础上，对ITER超导电流传输线导体等效弹性模量进行理论预测：预测一，只考虑电缆体外的不锈钢导管、双绝缘和双屏蔽层；预测二，忽略柔性电缆体的影响，但考虑其内部氦管；预测三，假设电缆体呈各向同性，弹性模量取1～10 GPa；预测四，利用均匀化理论分析电缆体的等效弹性模量，复合材料损伤理论分析超导电缆与中心氦管之间、电缆复合体和不锈钢导管之间界面情况。

In this dissertation, the moderately thick plate which works as transfer layer in" JinChao Mansion"in Hangzhou is analyzed by 3 dimensional solid finite element and the 9node mixed plate bending element. Several computation models for the transfer plate and the axial deformations of the columns and ahear walls which support the plate are considered in the analysis.

文中用三维实体单元和九节点混合板弯曲单元对杭州&金潮大厦&厚板结构转换层进行了分析，分析中考虑了多种计算模型，并用弹性支承近似地考虑了支承转换板的柱和剪力墙的轴向变形，文中给出了大量的图表。

Aiming at the special deformation mechanism during the with tension rolling of H beam in universal pass, a three-dimensional continuous kinematically admissible velocity field is put forward for the first time, in which, the non-uniform distribution of longitudinal velocity in lateral direction and the special deformation mechanism of the web and flange joint deformation zone are taken into consideration.

针对H型钢在万能孔型中带张力轧制时特殊的变形机理，首次提出了考虑金属横向流动的三维、连续运动学许可速度场；速度场中考虑了纵向流动速度沿横向的不均匀分布以及腹板和翼缘交界变形区的特殊变形状态。

The study considers not only horizontal trans lation of the base but also vertical translation and rocking motion of the base.

研究中不仅考虑了基础的水平平动，而且考虑了基础的竖向平动和摇动。

The maximum perturbation accelerations and their percentage contribution in the sum of all accelerations due to the lunisolar perturbations,Earth tides,ocean tides,atmospheric tides,pole tides,relativity effects,atmospheric drag and solar radiation pressure are computed on the basis of simulated orbit.

结果表明：①在1.0ⅹ10-9m/s2的非保守力测量精度内，除大气潮可忽略外，其余摄动必须考虑；②考虑GOCE预期定轨精度(3 cm)，在弧长小于2.0 h的短弧定轨中，固体极潮和大气潮的影响可忽略，在长弧定轨中，忽略任何一种保守力的轨道预报时间均不足0.5 d；③各种潮汐对重力梯度观测值的影响量级均小于GOCE预期的测量精度(3 mE)。

Both seismological theory and macroseismic observation show that the shape of strong motion response spectrum depends mainly on magnitude,distance of epicenter and engineering site condition.since it is considered just the effect of engineering site condition and epicenter distance of only site condition to determine the characteristic period of acceleration response spectrum in the antiseismic design criterion of our country at present,the characteristic period of response spectrum determined from those critetion is different from that got from special seismic hazard analysis.

地震学理论和强震观测都表明，强震反应谱的形状主要取决于震级、震中距和场地条件。由于我国现行的各种行业建筑物抗震设计规范中对标准加速度反应谱特征周期Tg作出的规定中一般只考虑场地和震中距的影响或只考虑场地影响，因此在某些情况下，由规范所得到的反应谱特征周期与由专门的地震危险性分析所得到的结果相差较大。

First,it mainly utilizes analytics to deduce formula of slot leakage reactance.It considers three instances,including monolayer-slot,multilayer isometric-slot and multilayer anisometric-slot.Then,the analytics and the FEM are utilized to calculate slot leakage reactance of stator winding of prototype of Powerformer and compare their results.Second,the theory of utilitzing FEM to calculate the reactance of Powerformer is simply introduced,including stable reactance,transient and subtransient reactance.Specially,the saturated influence of the stable reactance is considered.Then, the results are analysed.Final,it mainly introduces the influence of harmonic magnetomotive force of stator winding and analyses the harmonic magnetomotive force of stator winding.

首先是用解析法推导出Powerformer定子绕组槽漏抗的计算公式，考虑了单层圆形半闭口槽、多层等半径圆形半闭口槽和多层不等半径圆形半闭口槽三种情况，并对Powerformer样机的定子绕组槽漏抗用解析法和有限元法进行了计算，并比较其结果；其次，简要介绍了有限元法计算Powerformer电抗参数的原理，包括稳态电抗、瞬态电抗和超瞬态电抗，对稳态电抗考虑饱和影响，对结果进行分析；最后，介绍定子绕组谐波磁势对电机运行性能的影响并对定子绕组谐波磁势进行了分析。

Not only photobiomodulation but also the change of visual efficacy in mesopic level to traffic safety should be considered in road lighting conditions,the influence of them can be scaled by reaction time.

在道路照明条件下，不但要考虑光生物效应对交通安全的影响，还要考虑中间视觉时视觉功效变化对交通安全的影响，它们的共同影响可以用反应时间来衡量。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。