查询词典 periodic

Based on the finite element method and periodic boundary conditions,a method to analyze the compressive strength of stitched laminates was established,which adopted a bridging model and maximum stress criteria to predict the development of damage and obtain the compressive strength.

提出了三维纤维弯曲模型，基于有限元法和周期性边界条件建立了缝合层板压缩强度分析方法，采用桥联模型和最大应力判据分析损伤扩展并获得压缩强度，预报结果与试验吻合较好。

Achieve cast market investment to drop to basically have the following reasons: Above all, investment case amount dropped considerably in July basically is to suffer achieve cast an industry to invest periodic element to affect.

创投市场投资下降主要有以下几个原因：首先，7月投资案例数量大幅下降主要是受创投行业投资周期因素影响。

A very fast and efficient array pattern synthesis algorithm-SFFT is described in this paper. This algorithm is well suited for many synthesis problems of planar array antennas with periodic element spacing, particularly the large arrays.

介绍了连续快速傅里叶变换，该算法适用于辐射单元周期排列阵列的各种综合问题，尤其对大型阵列综合表述更简捷、性能更优良、计算速度更快。

Bring about the element that the periodic wave motion of semiconductor market becomes more warm, include inventory to administer improvement, produce the flexibility that can administer improvement and memory production to rise.

导致半导体市场的周期摆荡变得加倍暖和的身分，包括库存治理改善、产能治理改善和内存出产的灵敏性进步。

Rare-earth element lies in sixth period among periodic table of chemical element and includes the 15 elements of lanthanides and elements scandium and yttrium.

稀土元素在化学元索周期表中，为第六周期，属于镧系族及钪、钇共17种元索的总称。

Electron Beam Ion Trap uses highly compressed electron beam to ionize ions and atoms to produces highly charged ions. lonization stages of almost any element in the Periodic Table can be produced and trapped for several hours in the EBIT.

电子束离子阱用磁场中高度压缩的高能电子束来电离离子以获得高价态离子，它可以产生元素周期表中任何元素任何价态的离子，并且能够在EBIT中的强磁场和静电势阱中约束足够长的时间。

The working load of engin e in plowing can be taken for stable and normal random load whose power spectrum peak value is below 2 Hz. The working load of engine in rototilling contains bo th periodic element whose fundamental frequency is rotating speed of the blade s haft and normal random load of which the parts of energy centers in fundamental frequency and others are distributed over wider frequency band.

证实了犁耕作业发动机的载荷可以认为是平稳的正态分布的随机载荷，其功率谱曲线的谱峰在低于2 Hz处；旋耕作业发动机的载荷是兼有随机成分和周期成分的动态载荷，其中周期谐波的基频为刀轴转速，随机成分一部分能量集中于基频以内，部分分布于较宽频率范围。

DCCI analysis thinks: Was worth on August 16 Saturday, channel of Olympic Games index group independent user always arrives to drop of dimensions considerably is the periodic element effect that suffers netizen online habit, suffer numerous more apt playday uses TV medium to pay close attention to spot match.

DCCI分析认为：8月16日正值周六，奥运指标频道群独立用户总到达规模的大幅下降是受网民上网习惯的周期因素影响，受众更倾向于休息日利用电视媒体关注现场比赛。

Experiment results show that these two methods have universal significance in the removal of periodic error disturbance in restored images.

实验结果表明，这两种方法对复原图像中周期性误差的消除有普遍意义。

The repetitive control is introduced for current control of active power filter to eliminate the steady state periodic error.

针对有源电力滤波器的被控电流为周期变化的正弦量，提出引入重复控制对有源电力滤波器电流进行控制，以减小系统的稳态误差。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。