摘要：宽透光范围是红外光学材料设计的一个重要因素.中远红外晶体的传统设计主要集中在无氧体系的硫属和磷属化合物.而在卤氧化物中引入重原子,如含孤对电子阳离子Pb^(2+)和卤素阴离子I^(-),可以拓宽红外透过范围.本文通过高温溶液法成功合成了两个含Pb(Ⅱ)的卤氧化物同质多晶,Pb_(14)O_(8)I_(12)(α-POI)和Pb_(7)O_(4)I_(6)(β-POI).有趣的是,它们结晶于同一空间群P1,并含有首次发现的[O_(8)Pb_(14)]簇.值得注意的是,POI展现出宽的透光范围(0.47-16.0μm),这表明卤氧化物是设计红外光学材料的优选体系.第一性原理计算表明它们具有较大的双折射(α-和β-POI在1064 nm处分别为0.139和0.108),这使得POI成为潜在的红外光学材料.

摘要：The similarity computations for fuzzy membership function pairs were carried *** number related knowledge was introduced,and conventional similarity was compared with distance based similarity *** usefulness of the proposed similarity measure was *** results show that the proposed similarity measure could be applied to ordinary fuzzy membership functions,though it was not easy to *** conventional results on the calculation of similarity for fuzzy membership pair,fuzzy membership-crisp pair and crisp-crisp pair were carried *** proposed distance based similarity measure represented rational performance with the heuristic point of ***,troublesome in fuzzy number based similarity measure for abnormal universe of discourse case was ***,the similarity measure computation for various membership function pairs was discussed with other conventional results.

摘要：高性能赝电容的发展需要从电子转移、电解质离子吸附和扩散方面全面理解电极材料.本论文结合第一性原理与转移矩阵法,以TiO_(2)为原型,通过引入各种缺陷,即氧缺陷(V_(O))和共掺杂缺陷(V_(O)+N_(O)),在综合考虑以上因素后获得了较高的赝电容.与本征TiO_(2)(300 F g^(-1))相比,有缺陷的TiO_(2)产生的赝电容高达1700 F g^(-1).此外,缺陷会使得表面能带弯曲减小电子传输势垒,H离子在TiO_(2)-V_(O)中显示出比在TiO_(2)-V_(O)+N_(O)中高得多的势垒,表明在共掺杂体系中H扩散更容易.这项工作为电解质离子的吸附和扩散以及缺陷对电子传输的影响提供了见解,对于下一代超级电容器电极材料的设计和优化具有重要意义.

摘要：A surface plasmon resonance(SPR) sensor based on a multi-core photonic crystal fiber(PCF) is presented in this *** is only one analyte channel positioned in the center of the PCF cross section,rather than several closely arranged analyte channels around the central *** the design of this sensor not only reduces the consumption of gold and samples,but also effectively avoids the interference between neighboring analyte *** field distributions of this fiber at different wavelengths and the sensing properties of this sensor are theoretically analyzed and discussed using finite element method(FEM).Simulation results confirm that both the thickness of metallic layer and the fiber structural parameters have significant effect on sensing *** amplitude sensitivity of the sensor is found to be 1.74×10-5RIU,and the spectral sensitivity is 3300 nm/RIU,corresponding to a resolution of 3.03×10-5 ***,in order to achieve PCF-SPR sensing characteristics,an experiment design scheme based on spectroscopic detection method is proposed.

摘要：An optimized micro-gated terahertz detector with novel triple resonant antenna is *** novel resonant antenna operates at room temperature and shows more than a 700% increase in photocurrent response compared to the conventional bowtie *** finite-difference-time-domain simulations,we found the performance of the self-mixing GaN/AlGaN high electron mobility transistor detector is mainly dependent on the parameters L gs（the gap between the gate and the source/drain antenna） and L w（the gap between the source and drain antenna）.With the improved triple resonant antenna,an optimized micrometer-sized AlGaN/GaN high electron mobility transistor detector can achieve a high responsivity of 9.45×102 V/W at a frequency of 903 GHz at room temperature.

摘要：In this paper,we present the design of a new photonic crystal fiber(PCF)gas sensor for evanescent-field sensing in terahertz(THz)wave *** sensor can be used to identify the gas,and its size is very large,so that it is beneficial to fill it with the test *** on simulation,we demonstrate that the gas sensor using PCFs with four noncircular large holes in the cladding has high sensitivity and low loss,the confinement loss is less than 0.007 dB/m,and the bending loss is very *** new PCF gas sensor can detect kinds of gases,for example,if test gas is water vapor,it has obvious absorption peaks in THz band,and the sensitivities of gas sensor are 64%and 73%at 1.097 THz and 0.752 THz,*** to the ultra-low loss and high sensitivity of the model,the novel steering-wheel structured fiber is very suitable for evanescent-field sensing and the detection of chemical and biological products.

摘要：Typical isolation models are studied and a New Application Security Isolation model called NASI is proposed, which is based on trusted computing technology and least privilege principle. This paper introduces the design ideas of NASI, gives out formal description and safety analysis for the model, and finally describes the implementation of prototype system based on NASI.

摘要：设计在酸性介质中具有高活性和高稳定性的氧析出反应(OER)催化剂对能量转换和储存技术的发展具有重要意义.然而,在实际OER条件下催化剂的原子结构会发生变化,且目前对其动态活性结构的认识仍然不足.本文中,我们通过退火和蚀刻纳米多孔Co-Ru合金合成了具有优异酸性OER活性和稳定性的原子级Co掺杂纳米多孔Ru O_(2)催化剂.原位X射线吸收光谱证实:蚀刻策略可以在原子级Co掺杂纳米多孔Ru O_(2)的金属中心周围产生丰富的氧空位,从而在实际OER条件下产生收缩的金属-氧配体键.这种动态结构演变降低了催化活性位点在OER过程中的动力学势垒,因而催化剂的催化活性和稳定性大幅提高.本研究结果揭示了催化剂活性结构的原子细节以及它们的结构演化对催化活性的影响.

摘要：采用高温熔液法合成了一种新的深紫外双折射晶体LiB_(5)O_(5)F_(2)(OH)_(4)(LBOFH).其结构中含有新的[B_(5)O_(5)F_(2)(OH)_(4)]阴离子基团,其由四个π共轭基元构成,即:两个[BO_(3)]和两个[BO(OH)_(2)]通过[BO_(2)F_(2)]基团连接成近共面构型.该阴离子基团具有非常大的各向异性极化率和HUMO-LUMO能隙,同时LBOFH表现出大双折射(0.124@546 nm)和宽带隙(7.99 eV)间的平衡.该工作为利用这种新型阴离子基团设计和合成深紫外双折射晶体提供了新的可能性,羟基氟硼酸盐也拓展了探索深紫外双折射晶体的研究体系.

摘要：In this paper,an improved mean-square exponential stability condition and delayed-state-feedback controller for stochastic Markovian jump systems with mode-dependent time-varying state delays are obtained. First,by constructing a modified Lyapunov-Krasovskii functional,a mean-square exponential stability condition for the above systems is presented in terms of linear matrix inequalities (LMIs). Here,the decay rate can be a finite positive constant in a range and the derivative of time-varying delays is only required to have an upper bound which is not required to be less than 1. Then,based on the proposed stability condition,a delayed-state-feedback controller is designed. Finally,numerical examples are presented to illustrate the effectiveness of the theoretical results.