铜-钼源漏电极对非晶氧化铟镓锌薄膜晶体管性能的改善

在铜(Cu)和非晶铟镓锌氧化物(a-IGZO)之间插入30 nm厚的钼(Mo)接触层, 制备了具有Cu-Mo源漏电极的a-IGZO薄膜晶体管(TFT). Mo接触层不仅能够抑制Cu与a-IGZO有源层之间的扩散, 而且提高了Cu电极与玻璃基底以及栅极绝缘层的结合强度. 制备的Cu-Mo结构TFT与纯Cu 结构TFT相比, 具有较高的迁移率(～9.26 cm²·V^-1·s^-1)、更短的电流传输长度(～0.2 μm)、更低的接触电阻(～1072 Ω)和有效接触电阻率(～1×10^-4Ω·cm²), 能够满足TFT 阵列高导互联的要求.     

地市级公安综合信息通信网络建设模式初探

本文就如何结合本地实际,因地制宜地建设好地市级公安综合信息通信基础网络,提出了一种投入省,见效快,效果好的网络建设模式。     

Large Enhancement of Optical Nonlinearities of New Organophosphorus Fullerene Derivative

Optical nonlinearities of new organophosphorus fullerene derivative were determined by the Z-scan method with a pulsed Q-switch Nd:YAG laser at 532nm. The experimental results demonstrated that the derivative has much larger excited-states nonlinear absorption and nonlinear refraction than C60. A five-level model was utilized to fit the experimental data, and a good agreement is reached. Some parameters such as excited-state absorption cross and refraction cross were obtained. To our knowledge, the excited-state cross section of new organophosphorus fullerene derivative and its effective ratio to the ground-state cross section are the largest values among the fullerene derivatives reported to date.     

基于最小包含球的大数据集快速谱聚类算法

 GRC (Graph-based Relaxed Clustering)是一种具有便捷性和自适应性的谱聚类算法,但对于大数据集,繁重的时间开销限制了其实用性.针对此不足,该文通过对GRC聚类指示向量进行约束并融合中心约束型最小包含球(Center-Constrained Minimal Enclosing Ball,CCMEB)理论提出了大数据集快速谱聚类算法CCMEB-CGRC.该算法继承GRC的便捷性和自适应性的同时又具有渐近线性时间复杂度的优点,从而较好地解决了大数据集快速有效谱聚类的问题.仿真实验的结果验证了该算法的有效性和快速性.     

四带近完美吸收双曲超构材料（英文）

当前的多带近完美吸收通常是利用多层叠堆或多特征尺寸组合阵列结构来实现,这给实验制备带来了一定的难度.本文从理论上提出了吸收率高达99%的四窄带近完美吸收,它是通过将单特征尺寸的金属和介电材料阵列置于金属衬底之上而构成.其四带近完美吸收的机理可通过求解双曲超构材料的色散关系,结合波导理论来解释.此外,由于这种多带近完美吸收具有高品质因子的特点,对外界环境的变化较为敏感,因而本文也就其在传感器方面的潜在应用进行了讨论.     

Origin of strain-induced resonances in flexible terahertz metamaterials

Two types of flexible terahertz metamaterials were fabricated on polyethylene naphthalate(PEN) substrates. The unit cell of one type consists of two identical split-ring resonators(SRRs) that are arranged face-to-face(i.e., Flex Meta F); the unit cell of the other type has nothing different but is arranged back-to-back(i.e., Flex Meta B). Flex Meta F and Flex Meta B illustrate the similar transmission dips under zero strain because the excitation of fundamental inductive–capacitive(LC)resonance is mainly dependent on the geometric structure of individual SRR. However, if a gradually variant strain is applied to bend Flex Meta F and Flex Meta B, the new resonant peaks appear: in the case of Flex Meta F, the peaks are located at the lower frequencies; in the case of Flex Meta B, the peaks appear at the frequencies adjacent to the LC resonance. The origin and evolution of strain-induced resonances are studied. The origin is ascribed to the detuning effect and the different responses to strain from Flex Meta F and Flex Meta B are associated with the coupling effect. These findings may improve the understanding on flexible terahertz metamaterials and benefit their applications in flexible or curved devices.     

AP-8电缆护套生产中异常问题的探讨

本文通过对AP-8电缆（出口电缆）护套生产过程中遇到的一些问题进行探讨,针对问题点进行分析并调整实际生产中的工艺和模具,不断修正生产中不同机台对吊高和吊宽要求的系数,确保产品质量满足客户及标准的要求.     

pH值响应性毒死蜱/铜席夫碱配合物改性SBA-15的制备及缓释性能

以3-氨丙基三乙氧基硅烷（APTES）、水杨醛和铜离子为改性剂,通过后嫁接法制得铜席夫碱配合物改性SBA-15（Cu-SBA-15）,并以毒死蜱为模型药物,制备了毒死蜱/铜席夫碱配合物改性SBA-15缓释体系。利用TEM、SEM、XRD、N₂吸附-脱附、TG、FTIR和XPS对SBA-15、氨基改性SBA-15（NH₂-SBA-15）、水杨醛希夫碱改性SBA-15（SA-SBA-15）的形貌、结构和Cu-SBA-15的配位情况进行了表征,考察了SBA-15在改性前后对毒死蜱的吸附量和缓释性能,并着重探究了毒死蜱/铜席夫碱配合物改性SBA-15载药体系在不同pH值下的释药行为。结果表明,APTES和水杨醛能够通过后嫁接法修饰于SBA-15,修饰后仍保持十分有序的孔道结构。SBA-15通过改性后,其对毒死蜱的吸附量由100 mg·g^-1增加至195 mg·g^-1,且其对药物的缓释性能也得到改善。毒死蜱/铜席夫碱配合物改性SBA-15缓释体系显示出明显的pH值响应性,pH=3时的释药速率大于pH=11时,而在中性条件下的缓释效果相对最好。载药体系的释药行为可用Riger-Peppas动力学模型来描述,其药物释放由Fick扩散控制。     

喷雾热分解法制备的钛酸钡颗粒内钡钛元素分布

基于氯化钡和二氧化钛具有不同的溶解特性,采用溶剂萃取法分别对喷雾热分解法和喷雾水解反应法制备的钛酸钡前驱体干燥产物颗粒内钡和钛分布进行定性分析,从而间接钛酸钡颗粒内的钡和钛分布情况。实验结果表明,该法可快速而准确地分析组合分析组分偏析情况。