玉米淀粉固态电解质质子\电子杂化突触晶体管

随绿色可持续发展观念的深入人心,研究人员致力于寻找天然有机材料应用于功能性电子器件.淀粉以其低廉的价格、丰富的来源和优异的机械性能进入了科研人员的视野.淀粉可由玉米、马铃薯、甘薯和葛根等含淀粉的物质中提取而得,一般不溶于水,在和水加热至一定温度时,则糊化成胶状溶液.本文通过旋涂法将玉米淀粉的胶状溶液旋涂至氧化铟锡玻璃表面,然后在30?C恒温环境中晾干制备成固态胶合状薄膜.以此薄膜作为固态电解质制备了氧化铟锌突触晶体管,并实现了生物神经突触的双脉冲易化、学习记忆能力、高通滤波等可塑性行为的仿真.本研究以玉米淀粉固态胶合薄膜作为电解质大大降低了氧化物薄膜晶体管固态电解质的成本,且该电解质无毒性、来源丰富,将为人工神经网络的开发提供一种可选择的元件.     

Real-time and label-free detection of biomolecular interactions by oblique-incidence reflectivity difference method

We successfully conduct the label-free and real-time detection of the interactions between epoxy groups and rabbit IgG and 5' CTT CAG GTC ATG AGC CTG AT 3' oligonucleotide, and between the hybridization of 5' CTT CAG GTC ATG AGC CTG AT 3' and its complementary 3' GAA GTC CAG TAC TCG GAC TA 5' oligonucleotide, by the oblique-incidence reflectivity difference (OI-RD) method. The dynamic curves of OI-RD signals, corresponding to the kinetic processes of biomolecular combination or hybridization, are acquired. In our case, the combination of epoxy groups with rabbit IgG and 5' CTT CAG GTC ATG AGC CTG AT 3' oligonucleotide need almost one and a half hours and about two hundred seconds, respectively; and the hybridization of the two oligonucleotides needs about five hundred seconds. The experimental results show that the OI-RD is a promising method for the real-time and label-free detection of biomolecular interactions.     

平直翅片管与波浪翅片管流动换热性能比较

扁管外焊蛇形平直翅片是直接空冷凝汽器翅片管的一种常见形式,为进一步提高空冷凝汽器的冷凝效率,建立了波浪翅片扁管的三维物理数学模型。通过数值模拟,获得了不同空气入口流速下,波浪翅片扁管和平直翅片扁管外冷却空气的流场和温度场,通过对流换热系数和流动损失的对比分析表明,波浪翅片扁管在空气侧换热系数和流动损失方面比平直翅片扁管有一定的优势,在低风速的工况下,优势较为明显。     

从国内外网络期刊的发展看新疆医学期刊信息资源的共建共享

根据国内外科技期刊的网络化发展,论述了新疆医学期刊资源共享的必要性.为了达到这种资源的共享,可以建设专家审稿库、作者库、网上投稿中心和网上信息发布及网上联合征订.这种资源的共享方式,不仅为新疆各医学期刊提供了更为广阔的利用与发展空间,也可以使作者的利益得到极大的体现,具有社会与经济双项效益.     

空冷岛扁平管外翅片空间的大涡模拟研究

本文基于计算流体力学软件FLUENT采用大涡模拟方法(LES)及Smagorinsky-lilly亚格子模型,对空冷岛扁平管外翅片空间的流动与换热特性进行了三维瞬态湍流数值模拟。计算结果表明大涡模拟方法能较好地模拟空冷岛扁平管外翅片空间的瞬态流动特性,能够捕获更多的流场细节信息。可得出流场中温度、压力、涡量等各参数的瞬态变化特性以及翅片空间尾流区瞬态三维涡的发展演化过程,更好地预测多尺度湍流。为进一步揭示扁平管温度场和流场的协同关系以及大型空冷系统多尺度输运规律和非线性尺度效应机理打下基础。     

Label-Free and High-Throughput Detection of Protein Microarrays by Oblique-Incidence Reflectivity Difference Method

We label-free detected the biological process of preparing a microarray that includes 400 spots of mouse immunoglobulin G （IgG） as well as the specific hybridization between mouse IgG and goat anti-mouse IgG by an oblique-incidence reflectivity difference （OI-RD） method. The detection results after each process including printing, washing, blocking, and hybridization, demonstrate that the OI-RD method can trace the preparation process of a microarray and detect the specific hybridization between antigens and antibodies. OI-RD is a promising method for label-free and high-throughput detection of biological microarrays.     

知识仓库及其管理技术的探讨

知识仓库是以多行业、类别历史数据仓库组成的一个集合,在CNKI的建设中运用知识仓库,解决了信息资源聚集,加工技术和技术处理、应用的工作问题,知识仓库具有强大的应用功能及广泛的应用范围,对于知识仓库的管理技术及其标准化和安全性建设,本文亦作了简要介绍。     

仿生生物感官的感存算一体化系统

生物感官集感知、存储与运算为一体的架构使其可以高效并且实时地采集和处理外界信息,这样的感存算一体化架构可为物联网时代面临的传感器数据爆炸问题提供很好的解决方案.为此,本文提出仿生生物感官的感存算一体化系统,采用不同的传感器模拟生物感受器的功能,以获取环境信息,传感器输出的模拟信号输入到模拟信号处理系统进行预处理,这样信号不需要在模拟域与数字域之间转换,可极大降低功耗和延时;预处理后的信号输入类脑运算芯片中进行分析和决策,该芯片由基于忆阻器的人工突触及人工神经元组成,通过控制突触与神经元的连接方式,可以实现不同的算法架构,如全连接脉冲神经网络、卷积脉冲神经网络以及循环脉冲神经网络等;通过运行不同的神经网络,类脑运算芯片可以实现对不同传感器信号的识别、预测以及分类等任务;更进一步,将多种仿生感觉系统的识别或预测结果结合起来,就可以实现多感官融合,这样的系统架构可以用于自动驾驶及智能机器人等复杂的场景中.     

Ultraviolet Sensitive Ultrafast Photovoltaic Effect in Tilted KTaO3 Single Crystals

An ultraviolet sensitive ultrafast photovoltaic effect is observed in tilted 10° KTaO3 （KT） single crystals. The rise time of the transient photovoltaic pulse is 497.4 ps and the full width at half maximum is 974.6 ps under irradiation of a 266 nm laser pulse with 25 ps duration. An open-circuit photovoltage sensitivity of 328 mV/mJ and a photocurrent sensitivity of 460 mA/mJ are obtained. The experimental results demonstrate the potential applications of KT single crystals in ultraviolet detection.     

Photoelectric property of LaAlO3-δ/Si heterojunctions with different oxygen contents

Three oxide heterojunctions made of LaAlO_3-δ/Si are fabricated under various oxygen pressures by laser molecular-beam epitaxy. They all show nonlinear and rectifying current--voltage characteristics, and the distinct difference in rectification behaviour among them. Their photoelectric properties are examined by a visible HeNe laser and an ultraviolet Hg lamp. We find that their photovoltaic responses are closely related to the oxygen contents in the LaAlO_3-δ films. The junction fabricated under the lower oxygen pressure has a higher photovoltaic sensitivity. The possible mechanism is suggested based on the band structure of the p--n heterojunction.