Quantum Scars in Microwave Dielec trie Photonic Graphene Billiards

Brillouin zone.The closed graphene system has proven to be the ideal model to investigate relativistic quantum chaos phenomena.The electromagnetic material photonic graphene(PG)and electronic graphene not only have the same structural symmetry,but also have the similar band structure.Thus,we consider a stadium shaped resonant cavity filled with PG to demonstrate the relativistic quantum chaos phenomenon by numerical simulation.It is interesting that the relativistic quantum scars not only are identified in the PG cavities,but also appear and disappear repeatedly.The wave vector difference between repetitive scars on the same orbit is analyzed and confirmed to follow the quantization rule.The exploration will not only demonstrate a visual simulation of relativistic quantum scars but also propose a physical system for observing valley-dependent relativistic quantum scars,which is helpful for further understanding of quantum chaos.     

关于复合材料方板对称性的讨论

采用有限元方法研究复合材料板的面外弯曲,振动及对冲击载荷的动力反应时,经常使用四边简支或四边固定的方板为例,来比较不同有限元方法的精度。为了节省计算工作量,Reddy在计算均布荷载下的复合材料方板(铺 ...     

β-环糊精聚合物在硝基苯微污染水中的应用

 硝基苯类污水具有难降解、毒性大、易扩散等特点,目前国内外开始对高浓度硝基苯污水的治理进行深入研究,但对微污染水却少有关注.常规给水处理技术无法处理硝基苯微污染水,长期饮用会对人体健康和生态环境产生严重影响.本文选用水不溶性β-环糊精聚合物为吸附剂,研究水不溶性β-环糊精聚合物的制备,考察其对含硝基苯微污染水的吸附作用,讨论固液比、pH等参数对吸附性能的影响,以及β-环糊精聚合物的再生性能.结果表明,每100mL溶液中加入100mg β-环糊精聚合物为最适固液比;聚合物对200μg/L、500μg/L、1mg/L、2mg/L的硝基苯溶液的吸附效率可达到80%以上;最佳吸附时间为2h;环境pH对吸附效率无太大影响;研究选择了乙醇为最佳再生剂,经连续再生4次后,聚合物吸附效率都维持在80%以上.     

CCD狭缝摄象

在过去的几十年中,各靶场已广泛应用狭缝摄影对种种飞行弹丸的多项重要技术参数进行测试,它在许多测试项目中应用的有效性、广泛性和经济性已被人们所肯定。据报道,在国外的一些靶场所进行的发射试验中,狭缝摄影机曾占全部测试设备中所使用的摄影仪器的百分之九十,这是因为狭缝摄影有其独特的、其它方法不可比拟的优点。     

一类参数不确定统一混沌系统的脉冲滞后同步

针对一类具有传输信道时间延迟且参数不确定的统一混沌系统，提出了一种脉冲控制同步方法.该方法将两个非自治混沌系统之间脉冲同步的实用稳定性问题转化为同步误差系统在原点的实用稳定性问题，基于脉冲微分方程的相关理论，给出了同步误差系统在原点的实用稳定判据，仿真结果验证了方法的有效性. 关键词： 统一混沌系统 混沌同步 脉冲控制 实用稳定性     

High-mobility germanium p-MOSFETs by using HCl and(NH_4)_2S surface passivation

To achieve a high-quality high-κ/Ge interfaces for high hole mobility Ge p-MOSFET applications,a simple chemical cleaning and surface passivation scheme is introduced,and Ge p-MOSFETs with effective channel hole mobility up to665 cm2/V·s are demonstrated on a Ge(111) substrate.Moreover,a physical model is proposed to explain the dipole layer formation at the metal–oxide–semiconductor(MOS) interface by analyzing the electrical characteristics of HCl- and(NH4)2S-passivated samples.     

Origin 8.5在亥姆赫兹线圈磁场测量实验数据处理中的应用

与传统的人工处理实验数据相比,Origin8.5软件处理实验数据具有方便快捷、直观、精度高等特点。文中通过使用Origin8.5软件处理亥姆赫兹线圈测磁场实验的数据,详细介绍了二维绘图、三维绘图以及非线性曲线拟合的过程,结果表明使用Origin8.5软件处理实验数据能有效的减少人工处理带来的误差。     

自由微观粒子相对论

给出自由微观粒子的时空变换理论和自由微观粒子的相对论能量表示.     

Compact temperature-insensitive modulator based on a silicon microring assistant Mach-Zehnder interferometer

<正>On the silicon-on-insulator platform,an ultra compact temperature-insensitive modulator based on a cascaded microring assistant Mach-Zehnder interferometer is proposed and demonstrated with numerical simulation.According to the calculated results,the tolerated variation of ambient temperature can be as high as 134℃while the footprint of such a silicon modulator is only 340μm~2.