The structural parameters of this photonic crystal terahertz waveguide with circular structure and the frequency guided in the waveguide have been obtained.

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Results of XRD,SEM,and UV-Vis indicated that ZnS nanocrystals can grow in and fill in the void of opal template,and SiO2 microspheres of templates are dissolved so as to form some three dimensional ordered porous structure and to form the inverse opal ZnS photonic crystals. Compared with opal templates,ZnS-opal and inverse opal ZnS photonic crystals assembled with SiO2 spheres in the same diameter show good optical properties and exhibited photonic band gap. The photonic band gap position of inverse opal ZnS moves towards UV area compared with opal and ZnS-opal.

結(jié)果表明：溶劑熱法多次充填可使ZnS納米晶在模板密堆積形成的空隙中均勻成核；經(jīng)過酸處理的ZnS-opal中SiO2微球溶解、坍塌，形成蜂窩狀三維有序介孔和反opal結(jié)構(gòu)ZnS基光子晶體三级视频网站视频网站受不了了；相同粒徑SiO2微球組裝的opal模板、ZnS-opal以及反opal結(jié)構(gòu)ZnS光子晶體均表現(xiàn)出光子帶隙特性，但反opal結(jié)構(gòu)ZnS光子晶體帶隙位置相比前兩者發(fā)生了藍移。

Then the light intensity transmission of polarizing prisms with the incidence of random spatial light beam is studied. Both experimental and theoretical results indicate that the light intensity transmission of air-spaced polarizing prisms are affected more by the change of random spatial incident angle than dielectric-spaced polarizing prisms.

結(jié)果表明：膠合層間的多光束干涉對棱鏡光強透射比的影響不可忽略黄网址资源站在线观看，對于空氣隙型偏光棱鏡，由于空氣隙間多光束干涉的影響，光強透射比隨任意角度變化較大717电影网琪琪电影网，而用膠合介質(zhì)膠合的棱鏡亚洲视频无码在线观看，其透射比對空間入射角不是很敏感欧美福利在线观看网。

The four sets of stator bars including those retired from three large generators and the standby bar subjected to Dynamic Mechanical Analysis, Scanning Electron Microscopic and optical microscope observation. It was revealed from DMA that the peak value tan d m of mechanical loss thermogram tan d ~ T shift toward a higher temperature and a lower amplitude, indicating that the amount of movement monomers diminished greatly in the insulation aging process, the tan d 195, increased very slightly with the service time of insulation, showing the degrading of bonding properties at interface, and the presence of more defects in insulation. The observation of SEM and optical microscope showed that more and more voids appears in insulation, and delamination was formed due to development of voids in aging process.

對不同運行年數(shù)的線棒進行了 DMA 、 SEM 、光學顯微鏡等微觀分析試驗，動態(tài)力學分析發(fā)現(xiàn)(參見 Hao et al， CEIDP， 2002：404)韩国三级片手机免费观看，力學損耗溫度譜 tan d ~ T 的峰值 tan d m 隨老化時間向高溫狼友视频网站内容在线观看、低值方向移動日韩在线精品直播网站免费观看，表明促成環(huán)氧發(fā)生玻璃化轉(zhuǎn)變的活性側(cè)基或發(fā)生局部運動的活性鏈段減少，分子鏈的剛性增強；195℃的力學損耗 tan d 195隨老化時間有緩慢增大的趨勢黄色网站免费看丝袜，表明有更多的能量耗散在界面處欧美综合午夜不卡视频，界面的粘合性變差黄色视频加毛片，甚至由于界面粘結(jié)不良出現(xiàn)微觀缺陷直接看的AV网站； SEM 和光學顯微分析發(fā)現(xiàn)(參見 Hao et al-2熟女人人操， IEEE DEI九九热视频精品在线， 2003)欧美韩日一区，老化后的絕緣氣隙增多，隨著老化時間氣隙不斷擴展或相互連通天天插天天干天天操，絕緣逐漸分層。

This model considers more factors, especially great and complex effect of geological factors on grouting spread, Value of fissure aperture is cleared and defined, all kinds of parameters of geology and grouts property in connection with model can be tested accurately, therefore this approach practice more and have more practical value comparing with other grouting model to provide solid theoretical basis for grouting controlling method.

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The results show that the heterostructure photonic crystal can extend remarkably the photonic bandgap compared with the periodic structure;a defect is inserted into the heterostructure photonic crystal,the nontransmission band is wider than that of the symmetric structure without heterostructures,(1H1L)_m(1H)_n(1L1H)_m.

結(jié)果表明，與周期結(jié)構(gòu)相比異質(zhì)結(jié)構(gòu)光子晶體可以顯著地拓寬光子晶體的光子帶隙人人爽日日操；在該文提出的結(jié)構(gòu)中引入缺陷九九精品视频免费观看视频，與(1H1L)m(1H)n(1L1H)m光子晶體相比26uuu在线播放，產(chǎn)生缺陷模式光子帶隙范圍明顯拓寬资源中文在线观看91，適當調(diào)整缺陷層的數(shù)目国产精品一区7m视频、位置和厚度可得到多通道濾波；并研究了實際操作中隨機誤差帶來的影響又爽又黄人妖免费视频，隨無序度的增大一级毛片免费播放在线视频尤，其帶寬基本不變。

Especially, the difference of the nearest-neighbor hopping integral is due to the effect of the curvature of the carbon nanotubes. So, in fact there is a very narrow energy gap near the Fermi energy of unsquashed metallic zigzag carbon nanotubes, and, a slighter deformation is required to open a considerable energy gap in metallic zigzag carbon nanotubes than that in armchair nanotubes.

特別是强奸乱论中文字幕，最近鄰格點之間的躍遷積分的變化與碳納米管的曲率緊密相關(guān)日韩国产精品你懂的在线播放，因此實際上在线观看视频在线高清黄色网站，理想金屬型 zigzag 碳納米管本身具有微小能隙黄色av电影在线，而施加比 armchair 碳納米管小的多的壓縮量，就可以使金屬型 zigzag 碳納米管在費米能處打開相當?shù)哪芟丁?/p>

Furthermore, when several bands near the Fermi surface are taken into account, we find that the interband gaps within the unoccupied bands are generally smaller than those of the occupied bands, indicating that the electron can hop from one band to another which is much easier than the hole.

而且，當研究費米能級附近的能帶時影音先锋每日资源站，發(fā)現(xiàn)未占有帶的帶隙總體上要小于占有帶的帶隙，這表明在考慮聲子參與的情況下日韩网友自拍区在线观看，電子在帶間的跳躍要比空穴容易得多亚洲女妇在线观看视频。

We discuss in this paper several kinds of decentralized algorithm: ALOHA, Slotted-ALOHA, CSMA, Tree Algorithm, and Pretested Random Tree Algorithm. We put emphasis on the method of ...

本文闡述隨機多址技術(shù)用來解決沖突的幾種算法：ALOHA黄色视频在线免费观看国产盗摄，分隙ALOHA，載波監(jiān)聽多址www...一级国产，樹形算法6080毛片，以及預測隨機樹形算法，著重討論如何提高信道利用率和獲得系統(tǒng)穩(wěn)定www.妓女网。

Theoretically,the intershell coupling makes energy bands of multiwalled carbon nanotubes split and the degeneracies in the energy bands reduced,and the bandgaps of multiwalled carbon nanotubes decreased.The small bandgaps of multiwalled carbon nanotubes ensure the presence of a vibrational manifold in the optical region for each shell so as to minimize optical emission.

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