查询词典 short time

A key point in Short Time Fourier Transform is the choice of window function. Although rectangle window is regarded as the first choice because it's featured by integral harmonic to filter signals and by DC component, decaying DC component and frequency shift of signals cause great error to rectangle window STFT. In addition, transient signals contain rich information of faults, but the fixed time window of STFT fail to collect these information.

STFT 算法关键问题之一是窗函数的选择，矩形窗以滤除信号整数次谐波和直流分量的特点自然称为首选窗，但衰减直流分量和信号的频率偏移对矩形窗 STFT 造成了很大误差；其次，暂态信号中含有丰富的故障信息，傅立叶变换固定的频窗忽略了这些特征信息。

Laplace transform is used to obtain the analytical solutions and long-time/short-time asymptotic solutions of the model.

然而实际油气藏的分布和孔隙结构是相当复杂的，对于非欧几里得的非均质多孔介

Due to the impossibility to compute the exact length of NURBS curve through integration in a short time, it is very difficult to get the deceleration distance and to forecast the point to begin the deceleration stage in real time.

由于不能通过积分方法在短时间内精确计算NURBS曲线的长度，使得在数控加工过程中实时计算减速距离、判断最终减速段开始点变得非常困难。

The Activated Ploy-oxygen Aerator adopts magnetic engineering technology to send the oxygen of air which is gathered and activated by polyoxier to the mixing chamber of main engine under water, and the process of water and oxygen synthesization is finished rapidly by the use of magnetizer and activated oxygen enriched air under water, which has been cut into tiny air bubbles by the high-speed rotated propeller of the mixing chamber in the process of water and oxygen synthesization, which can increase the affinity of water and oxygen. When flow rate of water is more than the buoyancy force of the tiny air bubbles, it is difficult for the tiny air bubbles to float on water in short time and the tiny air bubbles can stay in water for longer time, which can increase the efficiency of water dissolving oxygen and make the power efficiency of the machine is greater than traditional aerator obviously.

聚氧活化曝气增氧机采用磁性工程技术，将空气中的氧经聚氧器聚集活化后送到水下主机的混合室，由水下的磁化器和活化富氧空气快捷完成水气合成程序，在水气合成过程中已被混合室内高速旋转的离心叶轮切割成微小气泡，这些随射流、射向水下方的小气泡，其动能消耗至零后，在水中的浮力作用下、开始缓慢上升，由于提高了水与氧亲合力的小气泡只靠浮力沿着螺旋型的曲线缓慢浮升，这些小气泡在短时间很难浮上水面，因此延长了小气泡在水中的停留时间和行走路程，大大提高水中溶解氧的效率，使该机的动力效率明显高于传统曝气装置。

Be being achieved formerly also is not chaos is achieved formerly, need considers to master popular keyword to do at any time, such ability can be inside short time get effect instantly.

原创也不是乱原创，需要随时研究掌握热门关键词来做，这样才可以在短时间内立竿见影。

According to a short time, overeducation may restrict the improvement of the labor productivity for the falling of activity of labors, and lead to the decline of labor's ability for the deficiency of higher education; for a long time, overeducation may impact the distribution of labor structure and form Lemon Effect at the higher labor market for the expanding of demand for higher ...

从短期来看，过度教育不仅会因为影响劳动者工作积极性的发挥而制约劳动生产率的提高，也会因为本科教育的缺失而导致劳动者素质的下降；从长期来看，在过度教育情况下，由于人们对高学历的需求膨胀，不利于就业市场人才结构的合理分布，并可能在高端就业市场形成柠檬效应；同时，过度教育还将使得家庭条件差的毕业生在就业市场中处于更加不利的地位。

Ningnanmycin could passivate TMV during a very short time, but the passivation effect declines with increasing time. A relatively full protein content level was maintained after 10 min treatment of TMV with Ningnanmycin, but a lot of proteins were lost after 30 min treatment.

宁南霉素对TMV病毒短时间内具有钝化作用，而较长时间的作用效果不同，10 min钝化样品的蛋白组分保持较为完整，而30 min钝化样品的多肽缺失较为严重。

Because the supervision parties in short time in china. The supervision of my enterprises is perfective system of supervision, and how to work out content of system of qualitative control and files, and how to evaluate it. At the same time, leading into vague and comprehensive way of evolutions.

由于我国实行工程监理时间较短，各监理企业的质量控制体系不完备、不系统，本文研究制定了建设监理企业质量控制的模式；质量体系的运行操作；质量体系的具体内容和文件的编制；质量控制体系的审核与评审。

Objective To investigate the short-time and long-time effect of aspirin during the different grades of primary hypertension.

目的观察比较在不同血压级别的原发性高血压患者中使用阿司匹林的效果和预后。

If capital price has no relative with economic cycle, the market have no long time period, and the exchange, liquidity and short-time information will occupydominant station.

如果资产价格变动同经济循环无关，那幺市场也就谈不上存在长期趋势。交易、流动性和短期信息将占据主导地位。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。