On the basis of relation between the seism and solar activity, it is pointed out that the periodicity evolution of the seisimic activity is under the modulation of solar activity.

在太陽活動與地震相關(guān)研究的基礎(chǔ)上指出：在周期性太陽活動的調(diào)控下，地震活動也顯示出明顯的周期性演化。

Periodic tidally function influences mixed proportion of the hydrotherm and bottom currents, and temperature and component of diffuse flow also change periodically.

周期性的潮汐作用影響著底層洋流與熱液的混合比例，使得擴散流的溫度和成分也發(fā)生周期性的變化。

Examplesof periodic sound sources are musical instruments, vowel sounds, the whistling wind and bird songs. Nonperiodic sound sources include unpitched percussion instruments, coughs and sneezes and rushing water.

樂器的演奏www.99riav22、元音、鳥鳴及風聲都是周期性的聲音永久免费视频在线观看色黄，而打擊樂器聲婷婷五月丁香在线、咳嗽聲、噴嚏聲以及流水聲則是非周期性的99精品综合加勒比在线观。

Because the association was stronger in people with RLS and periodic limb movements than in those with just RLS, the researchers and Winkelman believe this genetic variant is likely one associated with periodic limb movements.

因為同時患有RLS和周期性肢體運動的人們比僅患有RLS的人們與基因變體相關(guān)性更強亚洲欧美色图13p，研究人員和Winkelman認為這一基因變體很可能與周期性肢體運動有關(guān)。

When locally scathed, the bearings would bump the other parts periodically with the result that the seasonal impulses come into being.

當軸承某一元件表面出現(xiàn)局部損傷時欧洲免费AV在线网站观看，在受載運行過程中要周期性地撞擊與之相互作用的其他元件表面而產(chǎn)生周期性的沖擊脈沖力国产综合视频网。

Retrahedrons O-Al4 and O-Fe4 exist in the Shandong sapphire, while other Tetrahedrons such as O-Al3Fe, O-Al2Fe2 and O-AlFe3 may also exist.

研究表明，山東藍寶石中Fe主要是以Fe~(3+)的形式存在的国内妇人成熟A片免费看；Fe含量的周期性變化主要表現(xiàn)為Fe~(3+)含量的周期性變化亚洲第一区在线观看；而在藍寶石中，F(xiàn)e主要是以類質(zhì)同象的形式替換Al而進入剛玉晶格的亚洲无码2019，在剛玉晶格中存在著O-Al_4亚洲高清无码91，和O-Fe_4的結(jié)構(gòu)格式，也極有可能存在著二者的幾個過渡型分子結(jié)構(gòu)如O-Al_3Fe久久亚洲精品无码网站，O-Al_2Fe_2及O-AlFe_3制服丝袜人中文字幕。

The calculation results show that the temperature of the valve cone changes periodically, leading to thermal stress changes periodically, which is the main reason of the valve cone pit corrosion; the operating temperature of the valve can be reduced by using the higher thermal conductivity materials; at the Same time, 3-D FEM provides a good theoretical basis in the process of the design and improvement for the parts of ICE.

計算結(jié)果表明：氣門錐面處周期性的溫度變化，會導致周期性變化的熱應力国产亚洲日韩在线视频，是導致氣門錐面疲勞點蝕的主要原因www.欧美.com；采用較高導熱系數(shù)的材料可降低氣門的工作溫度；同時日韩精品图片观看网址大全下载，三維有限元法能為內(nèi)燃機零部件的進一步設(shè)計改進提供很好的理論依據(jù)久久久久精品超国产。

The ANNs models of the periodic defected ground structures and a novel combinatorial nonperiodic defected ground structures with the characteristic of double stop band have been developed in this paper. The structure sizes of DGS and the frequencies are defined as the input samples of ANNs, the parameters of transmission coefficient calculated by FDTD method are sampled and defined as the output samples. For the PDGS with biggish structure sizes the transmission coefficients have the tiny dither owing to abnormal disturbance and the training samples have been smoothed by the least square method and five-spot triple smoothing method.

本文采用神經(jīng)網(wǎng)絡(luò)對周期性缺陷接地結(jié)構(gòu)和一種新型的具有雙阻帶特性的組合式非周期性缺陷接地結(jié)構(gòu)進行分析建模，將其結(jié)構(gòu)尺寸和頻率作為輸入樣本人人操人人插人人看人人爱，對FDTD法計算出的傳輸系數(shù)參數(shù)進行抽樣并將抽樣結(jié)果作為輸出樣本好妞在线三级片，然后采用貝葉斯正則化算法對神經(jīng)網(wǎng)絡(luò)進行訓練。

In experiments,grousers were added to wheel surface to increase driving force of wheel.Grousers can increase driving force of wheel.Yet grousers also introduce vertical wave of wheel.

輪刺增大驅(qū)動力人人操人人超、減小滑動的同時也帶來了車輪在垂直沙面方向上周期性的位移波動99久久久国产一区二区三区，這是對月球車前進穩(wěn)定性不利的一個影響因素，車輪前進速度也山于輪刺的作用產(chǎn)生了周期性的波動欧美www视频在线观看。

The results show that a the variation of annual mean runoff of Huayuankou section exist an intrinsic dynamic mechanism, which is the results of joint action of affecting factor of periodicity and non-periodicity, having obvious chaos characteristic; b the correlation dimension of attractor of phase space is 5.09 and saturation inserted dimension is 14. It shows that to establish a mathematical model of the annual mean runoff system of Huayuankou at least requires 6 independent variables and the required saturation inserted dimension for rebuilding phase space is 14; c the steady estimate of Kolmogorov entropy is 0.14, showing the average predictable time of the annual mean runoff variation of Huayuankou is about 7 years and; d using nonlinear deterministic chaos model is more suitable to describe the variation of annual mean runoff of Huayuankou.

結(jié)果表明：①花園口年平均徑流量變化存在著內(nèi)在動力學機制欧美大屌插逼，是由周期性和非周期性影響因子共同作用的結(jié)果，具有明顯的混沌特性日韩精品免费观看大全网站；②相空間吸引子的關(guān)聯(lián)維為5.09黄片在线浏览器，飽和嵌入維數(shù)為14，這說明要建立花園口年平均徑流系統(tǒng)的數(shù)學模型黑人大刚交亚洲，至少需要6個獨立變量aaa黄色视频aaa，重構(gòu)相空間所需要的飽和嵌入維數(shù)為14；③Kolmogorov熵的穩(wěn)定估計為0.14欧美第一黄片，說明花園口年平均徑流量變化的平均可預報時間大約為7年视频一区亚洲无码；④用非線性確定性的混沌模型比完全的隨機模型更適于描述黃河花園口年平均徑流量的變化。