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In this paper, the development of modifying study on the toughening and heat-resistance of phenolic resin are reviewed. The function mechanisms, and research level are discussed.

综述了酚醛树脂增韧和耐热复合改性的研究进展,分析了各种方法的改性机理及研究现状。

It facilitates the manipulation and analysis of macromolecular structures, protein complexes and molecular dynamics trajectories.

它便利了大分子结构、蛋白质复合物和分子动力学轨道的处理和分析。

Therefore, the EL spectra of (Znq_2)_4 is wider than that of Znq_2. 4._2 was synthesized. The analysis of molecular spatial structure and the characterization of material performance of_2 and Liq showed that two Liq molecules and two Naq molecules were connected by Na-O-Na bond bridges to form_2. Compared with Liq,_2 exhibits stronger rigidity in planar molecular structure, larger steric hindrance and intermolecular distance, and much smaller molecular polarity, thus resulting in much longer fluorescence lifetime, much higher fluorescence quantum efficiency, wider energy bandgap and better film formability. When used as light-emitting layer in OLED,_2 shows lower formation probability of excited dimmer and exciplex formation than Liq, thus emits bluer light with higher current efficiency than Liq. When_2 ultrathin film is used as electron injection layer in OLED, it exhibits higher current density, higher luminance, lower turn-on voltage and higher current efficiency than Liq ultrathin film for the existence of sodium ions in_2 ultrathin film. 5. The summarization the relationship between molecular spatial structure and material performance of Alq_3,(Znq_2) and Liq, lead the conclusion that the molecular spatial structure of Mq_n affects its material performance in such aspects as the rigidity of planar molecular structure, intermolecular interaction, molecule stacking mode and intermolecular distance.

制备了_2,通过对_2和Liq的分子空间结构与性能进行分析与讨论,发现_2是通过两个Na-O-Na键桥将两个Liq和两个Naq连接构成的,其分子平面结构的刚性程度强于Liq,空间位阻大于Liq,分子之间的距离大于Liq,分子极性远远小于Liq;_2的荧光寿命长于Liq,荧光量子效率高于Liq,成膜性优于Liq;_2的禁带宽度比Liq大,光致发光光谱中_2的最大发射峰较Liq发生蓝移;当_2在OLED中作为发光层时,激发二聚体与激基复合物的生成几率远远小于Liq,发的光比Liq更蓝,电流效率大于Liq;_2超薄膜中有Na离子的存在,与Liq超薄膜相比,当其在OLED中作为电子注入层时,具有更大的电流密度,更高的发光强度,更低的阈值电压和更高的电流效率 5、对上述Alq_3、Znq_2和Liq的分子空间结构与材料性能之间的关系进行了归纳总结,认为Mq_n的分子空间结构主要在分子平面结构的刚性程度,相邻分子之间的相互作用,分子堆叠的方式和分子之间的距离这四个方面影响其性能。

The luminescence mechanism was studied and we considered that photo-excitation occurs at inside of Si nanoparticles, and then the photo-generated carriers relax to the surface and radiatively recombine on the surface states.

我们对多孔硅的发光机理进行了分析研究,认为光激发发生在纳米硅颗粒中,光生载流子弛豫到颗粒表面,在表面氧化层中表面态上辐射复合而发光。

Some conventional optical antennas like hemispherical lens, compound parabolic concentrator, Cassegrain telescope were analyzed with the software of ZEMAX.

针对非视线大气光通信的需求,利用ZEMAX软件对半球透镜、复合抛物面聚光器和卡塞格伦望远镜等光学天线进行了性能分析。

In this paper, the primary terms in closed form, which are essential to the influence of interference effects of the notches are obtained by means of the modification of body force densities, the adoption of local coordinates with respect to the center of each notch element and the decomposition of Melan's fundamental solutions. Thus an improved body force method is proposed for analyzing interference effects of random boundary notches subje-cted to complex loads.

本文通过修改体积力密度的定义、引入建立在各缺口单元中心处的局部坐标并分解Melan基本解,获得了影响缺口群相互干涉效应的主项封闭解,从而建立了能有效地分析复合载荷作用下任意边界缺口群相互干涉效应的改进型体积力法。

The analysis of gas-phase chemistry and speciestransfer mechanism clearly show the biggest source of heating substrate is therecombination heat of atomic H on the substrate surface.

气相化学和输运机制的分析表明,原子H在衬底表面的复合放热是HFCVD中衬底加热的主要来源。

Based on the theory of aerothermodynamics for rarefied gas, discusses the principle of compound heat transfer in the vacuum layer.

应用稀薄气体分子热运动理论,研究了真空层复合传热机理,提出了真空层当量导热系数计算方法,分析了不同真空层压力和热媒温度对真空层传热量的影响以及导热、对流和辐射传热量在真空层总传热量中所占比例和变化规律,提出优化真空保温管道保温性能的方法。

To avoid the shortcoming of magnification change with wavelength, which will cause the spectral image pixel registration error and provide inaccurate relative spectral signal strength in the classical diffractive optic imaging spectrometer, a novel hybrid refraction/diffraction telecentric optical system combining a diffractive lens with an achromatic lens system is presented, and the working principle is then established.

为了克服在传统衍射光学成像光谱仪中,衍射透镜的焦距随波长变化引起系统放大率随波长变化,从而导致光谱图像的像元配准误差,得到并不精确的相对光谱信号强度,提出了将衍射透镜与消色差透镜系统相结合的新型折/衍混合、二组元复合远心成像光学系统的技术方案,具体分析推导了该系统的成像理论。

Based on Timoshenko theory and by using the transfer matrix method, this paper analyzed composite beam composing of uniform beams with different material or cross-section areas.

本文基于Timoshenko理论,利用传递矩阵法,对由不同材料和不同截面大小的等截面杆组成的复合杆进行了振动分析。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力