Such stars periodically wax and wane in brightness: the longer a cepheid's period the bigger and brighter it is.

這類星的亮度有周期性盈虧：周期越長(zhǎng)中文字幕乱伦91，該造父變星體積就越大精品无码国产污污污免费，亮度也越高中文字幕第1页中文字幕在线。

It is difficult to calculate the natural frequencies of silent chain drive accurately because of the discontinuity of its structure and the polygonal effect.

其中心線的位置存在著周期性的變化肏屄性爱欧美性爱，這種變化使得鏈節(jié)和鏈輪的接觸與脫離是在一瞬間完成的亚洲一区精品黄，鏈條存在著劇烈的橫向振動(dòng)一级做a爰片久久毛片A片美国。

The non autonomy statement equation basic circuit was established in this paper,and the conservation electric charge equation was worked out basing the periodicity of its stable solution.

對(duì)包絡(luò)檢波的基本電路建立非自治狀態(tài)方程，并根據(jù)其穩(wěn)定解的周期性欧美福利午夜，推導(dǎo)出電路的電荷量守恒方程亚洲精品456在线播放第1集，并通過(guò)假設(shè)的條件近似和簡(jiǎn)化方程。

A long-term graph of the Vix hints at cyclicality, with periods of great choppiness in the early and late 1990s book-ending an era of relative calm in the middle of the decade.

Vix 的長(zhǎng)期圖像也暗示著周期性国内下药视频在线观看，1990s的早期和末期呈現(xiàn)大量的波浪538在线视频免费观看国产，夾在中間的90年代中期卻是一段相對(duì)平靜的時(shí)期96视频网。

Circadian rhythms and other cyclical behaviors are more complex examples of behavior tuned to the environment.

晝夜節(jié)律和其他周期性行為更為復(fù)雜的例子行為調(diào)整到環(huán)境中。

N experiment combining flow visualization and temperature measurement is carried out in the present study to investigate the possible presence of new inertia-driven vortex rolls and some unique characteristics of the time-dependent mixed convective vortex flow resulting from a high speed round air jet impinging onto a heated horizontal circular disk in a vertical cylindrical chamber.

bstract：本篇論文利用實(shí)驗(yàn)流場(chǎng)觀測(cè)方法及溫度場(chǎng)量測(cè)方法對(duì)於垂直圓柱容器中一高速空氣圓形噴流沖擊至一加熱圓盤之可能產(chǎn)生新的慣性力驅(qū)動(dòng)渦流和一些獨(dú)特的周期性混合對(duì)流渦流流場(chǎng)特性進(jìn)行研究狼友在线视频在线播放。

This paper use Mirror closed extension to solve the problem of end effect. Mirror closed extension maps the signal into a periodic signal of the ring through the mirror image method, and there is no endpoint, and fundamentally avoids the end effects of EMD and Hilbert transform.

針對(duì)這一日本三级片黄色。。日韩黄色AV网。更多問(wèn)題黄色丝袜视频网，本文利用鏡像閉合端點(diǎn)延拓來(lái)抑制端點(diǎn)效應(yīng)，閉合端點(diǎn)延拓法即用鏡像法把鏡內(nèi)信號(hào)映射成一個(gè)周期性的環(huán)行信號(hào)国产精品手机在线，不存在端點(diǎn)黄视网站，從根本上避免了EMD和Hilbert變換的端點(diǎn)效應(yīng)。

According to the theoretical analysis and experimental results,thestanding wave field in the closed tube can be divided into four regionsin frequency domain:i.e.

二次图片区自拍偷拍、三次諧波相對(duì)于基波的量值隨激發(fā)頻率呈周期性變化是本實(shí)驗(yàn)研究的一重要結(jié)果成年人视频www。

Inspirited periodically by means of centrifugal inertial force, the lopsided rotor will produce coercionary vibration and inordinate noises, accordingly result in the exacerbating of the working conditions. At the same time, the components of the axletree will wear down quickly, that has reduced the natural life and working efficiency.

由于周期性的離心慣性力對(duì)轉(zhuǎn)子的激勵(lì)作用，不平衡轉(zhuǎn)子將產(chǎn)生強(qiáng)迫振動(dòng)和過(guò)度噪聲9999国产精品欧美久久久，從而導(dǎo)致工作環(huán)境惡化欧美孕妇与黑人孕交4p，加速軸承等零部件的磨損，降低機(jī)器的使用壽命和工作效率黄色网站入口直接看。

The commensurability is the expansion of periodicity.

可公度性即概周期免费黄色网站有，是周期性的一種擴(kuò)展。