superlattice造句
例句与造句
- However , the change in the well depth of the two materials will affect one another the thermal conductivity greatly , and because of the lattice mismatch , the strain appears in the interfaces of the superlattice , thus rendering an obvious modification of the thermal conductivity of the two materials
而势阱深度的改变则两种材料的导热性能会相互产生影响，但在晶格不匹配时，超晶格薄膜的界面出现了应变，两者的导热系数均会产生较大的变化。 - For the requirement of more negative differential resistance ( ndr ) routes , three split quantized energies are formed in the four - period inp / ingaas superlattice structure with relatively thin ingaas quantum wells under ideal flat - band condition , and high - field domain in the superlattice is formed under sufficiently large operation bias
为获得?多轨迹的负微分电阻，本研究组件使用?相当薄之砷化铟镓?子井，可使四周期磷化铟/砷化铟镓超晶格结构在平带情况下形成三个分?的?子化能阶，且于足够大的操作偏压下在该超晶格结构中形成?高场区域。 - We obtain that i ) with the increase of the phonon - pseudospin interaction and the thickness of the superlattice , the phase transition temperature of the superlattice will increase . ii ) the increase of the phonon - pseudospin interaction leads to the change of the number of the pyroelectric peaks in the temperature curve of pyroelectric coefficient and to the change of the pyroelectric coefficient
研究发现，声子与赝自旋的相互作用会影响铁电超晶格热电峰的数目以及热电系数的温度曲线的形态，而且声子与赝自旋耦合作用的增强以及超晶格尺寸的增大都会使整个材料的相变温度增加。 - The electric field domains and current self - oscillations which result from sequential resonant tunneling between different subbands of the superlattice are very significant phenomena . we have optimized the simulation using matlab software . comparing the processing data , we know that various ode commands solve problems with different difficulties
本论文主要内容包括以下几个方面：运用matlab软件进行模拟计算的算法优化，从比较掺杂弱耦合gaas / alas超晶格模拟计算的过程数据可得，不同的ode命令可求解问题的难度是不同的：针对较低难度问题，即研究固定偏压下超晶格纵向输运的求解问题( du / dt = 0 ) ，一般首选ode45 。 - 4 . the preparation of ddt - modified gold nanoparticles and the dicuss of their optical properties we preparated ddt - modified gold nanoparticles using brust approach . tem showed that ddt - modified gold nanoparticles had a uniform size and could be self - assemblyed to form a two - dimensional superlattice on a certain concentration ; we tried to assembly this nanoparticles to slippery substrate and studied their optical preproperties
4 .十二烷基硫醇( ddt )修饰的金纳米颗粒的制备及对其光学性质的探讨本文采用了brust法制备了硫醇修饰的金纳米颗粒，用电镜进行了表征，表明制出的金纳米颗粒粒径比较均一，而且在浓度相当的情况下，能够通过化学键与范德瓦尔斯力之间的相互作用形成有序结构。 - It's difficult to find superlattice in a sentence. 用superlattice造句挺难的
- Firstly , i provide a brief review of the previous achievements and investigations on the low - dimensional quantum devices and semiconductor superlattice , in which some principal theories such as bloch oscillations , wannier - stark ladder , zener tunneling and related progress in experiments are introduced
首先综述了过去三十年低维量子器件与半导体超晶格的发展与相关研究，介绍了bloch振荡、 wannier - stark台阶、 zener隧穿等关键理论以及相关实验方面的进展，并引入简化模型：紧束缚模型与单带模型。 - For the first current plateau ， two kinds of sequential resonant tunneling of - process and - x process are observed in the wide barrier gaas / alas superlattice under various pressures for p < 2kbar ， the high field domain is formed by - process ， while for p > 2kbar ， the high field domain is formed by - x process when the barrier width was decreased to 2nm , we found that ground - state -
对于宽垒( > 3 . 5nm )的gaaa / alas超晶格，当流体静压力超过临界压力2kbar后，平台宽度随压力的升高而收缩。对于窄垒( 2nm ) gaaa / alas超晶格， u - i曲线上的平台将不随压力变窄。 - However , when the applied bias voltage is located within negative slope regions of u - i curve , the superlattice will undergo a very fast dynamic process , changing from one stable state to another stable state . the superlattice exhibits temporal current oscillations in the negative differential conductivity region at fixed d . c
当外加电压使电流处于正微分电导区变动时，超晶格的高低电场畴之间的畴边界不发生移动，只是相应的电场强度作些调整；当外加电压使电流处于负阻区域时，超晶格将经历一个稳态到另外一个稳态的动力学转变。 - 2 . second harmonic generation in superlattice is derived from the coupled equation of three waves i discusing the relationship between the period of ppln and pumping wavelength . 3 . on the theory of optical parametric oscillators , ppln - opo are analyed . theoretical analysises on temperature tuning and period tuning are presented
以光参量振荡理论为基础，分析了ppln opo在不同泵浦波段的调谐特性，重点讨论了加ln opo的温度调谐和周期调谐特性以及ppln opo的温度带宽周期带宽，从理论上研究了ppln opo信号光的转化效率和输出特性。 - Secondly , within the framework of the transverse ising model , we investigate the effects of the phonon - pseudospin interaction on the pyroelectric properties of a ferroelectric superlattice by use of the green function ( gf ) . the effects of the size effect on pyroelectric properties of the superlattice are investigated by taking into account the phonon - pseudospin interaction
在横场伊辛模型的框架内，应用格林函数方法对具有声子与赝自旋相互作用的铁电超晶格的热电性质进行了研究，考察了铁电超晶格的尺寸对材料热电性质的影响。 - Since the concept of superlattice was proposed , vertical transport in superlattice has been investigated widely . the electric field domains and current self - oscillations which result from sequential resonant tunneling between different subbands of the superlattice are very significant phenomena . such kind of oscillation can be uesd to make tunable microwave oscillaors . in this thesis , low temperature transport problem , especially the formation of field domain and the condition of current self - oscillations in doped gaas / alas superlattice with weak coupling are investigated thoroughly and also by combining the macroscopic model with the microscopic one . , the voltage - current characteristic and the current oscillation are simulated . the calculated result is nearly consistent with the experimental data
由超晶格中子能级之间的顺序多阱共振隧穿引起的电场畴及电流自维持振荡现象是其中的一个非常有意义的分支，该现象可用来制作电压调谐微波振荡器。本论文对弱耦合掺杂gaaa alas超晶格中的纵向输运特别是针对低温下的场畴的形成和固定偏压下电流自维持振荡产生的条件进行了深入的探讨，并结合宏观模型和微观模型对超晶格在时变电压作用下的电压-电流特性以及固定偏压作用下的电流特性进行了模拟计算。
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