A Low On-Resistance SOI LDMOS using a Trench Gate and a Recessed Drain Ge Rui(葛锐), Luo Xiaorong(罗小蓉)?, Jiang Yongheng(蒋永恒), Zhou Kun(周坤),

本文提出了一种超低比导通电阻(R_on,sp) SOI槽栅凹漏MOSFET(TGRD MOSFET)。正向导通时,槽栅和凹漏的结构增加了导电区域,缩短了电流流经的路径,从而降低了比导通电阻。并且此结构中采用了RESURF结构提高了漂移区浓度,进一步降低了比导通电阻。当TGRD MOSFET的半个元胞尺寸为6.5μm时,它的击穿电压为97V,R_on,sp为0.985mΩ.cm₂。与SOI槽栅MOSFET(TG MOSFET)和常规MOSFET(Conventional MOSFET)相比,在相同的BV下,TGRD MOSFET的R_on,sp分别地降低了46%和83%。或者在相同的R_on,sp下,与SOI槽栅槽漏MOSFET(TGTD MOSFET)相比, BV提高了37%。     

基于RBF神经网络的机抖激光陀螺零偏的温度补偿的研究

温度偏置漂移是存在于激光陀螺中使得输出信号产生较大偏置误差的一种不可忽略因素,准确地辨识漂移并有效地对其进行补偿直接关系到激光陀螺的测量精度.通过温度实验研究了机抖激光陀螺的温度特性,采用RBF网络进行温漂辨识.温漂辨识可以通过离线事先学习,因而在多种学习方法中选择了简单易行、精度高且运算速度快的正交最小二乘(OLS)法.通过实验验证,采用RBF网络及其OLS学习算法可以快速、有效、高精度地辨识并补偿温漂.     

衬底表面处理对原子层沉积方式生长铂金薄膜的影响

在这篇文章中,我们利用原子层沉积(ALD)的方式在硅衬底上生长铂金(反应源是(CH₃C₅H₄Pt(CH₃)₃)和氧气)。将经过氢氟酸处理和氧气处理的两种类型硅衬底进行生长对比实验来探究衬底表面处理对原子层沉积方式生长铂金薄膜的影响。相对于经氧化处理的硅衬底来说,在氢氟酸处理的硅衬底上淀积铂金薄膜有较长的滞后时间且生长过程不同。此外,即使在原子层沉积铂金薄膜实验之前利用氢氟酸处理硅衬底以去除天然氧化层,淀积实验完成后在铂金和硅衬底界面处仍有一层中间氧化层。文章解释了导致这种差异性的原因。     

Crumple Durable Ultraflexible Organic Solar Cells with an Excellent Power-per-Weight Performance

Ultraflexible and ultra-lightweight organic solar cells (OSCs) have attracted great attention in terms of power supply in wearable electronic systems. Here, ultrathin and ultra-lightweight OSCs, with a total thickness of less than 3 µm, with excellent mechanical properties in terms of their flexibility and ability to be stretched are demonstrated. A stabilized power conversion efficiency (PCE) of 15.5% and unprecedented power-per-weight of 32.07 W g⁻¹ at a weight of 4.83 g m⁻² is achieved, which represents one of the best-performing OSCs based on ultrathin foils substrate reported to date. The ternary strategy introduces the third component of amorphous conformation of the PC₇₁BM molecule, which can slightly reduce crystallization and aggregates without decreasing the electron mobility, thereby reducing rigidity and brittleness of the active layer. The increase in the ductility of the active layer significantly improves the mechanical flexibility of the device, resulting in over 90% retention in the PCE after 200 stretching–compression cycles. In addition, the ternary device exhibits excellent stability when stored in a N₂-filled glove box, resulting in the PCE retaining over 95% of its initial efficiency even after 1000 h. This ultraflexible and ultra-lightweight photovoltaic foils constitute a major step toward the integration of power supply into malleable electronic textiles.     

DVB-S2中LDPC编解码分析

本文在简要介绍LDPC码的基础上，就DVB—S2标准中LDPC编解码过程进行了详细的分析，指出了值得关注和研究的元素。     

FDTD Study on Back Scattering of Conducting Sphere Coated with Double-Negatibe Metamaterials

The shift operator method in finite-difference time-domain method for anisotropic double-negative (DNG) metamaterials is derived. The problem which incorporates both anisotropy and frequency dispersion at the same time is solved for the electromagnetic wave propagation in DNG media. By comparing with the mie series solution, the numerical verification of the method and program are confirmed by computing the back scattering of isotropic unmagnetized plasma sphere. The back scattering of conducting sphere coated with DNG media with different parameters is computed by using the shift operator method. One finds that the degree of DNG media’s match and isotropy plays important parts in the decrease of the back scattering of the conducting sphere.     

电信网网管系统软件测试的必要性研究

从现有的电信网网管系统入手,分析其结构和未来发展趋势,强调了软件是其未来发展核心这一概念;接着阐述了为实现发展目标而引入的新技术给网管系统带来的影响以及消除影响的方法,尤其是软件测试所起到的作用;最后简述了针对网管软件特点的测试方法和测试项目。     

Seeking powerful information initial spreaders in online social networks: a dense group perspective

The rapid growth of online social networks (OSNs) has ultimately facilitated information spreading and changed the economics of mobile networks. It is important to understand how to spread information as widely as possible. In this paper, we aim to seek powerful information initial spreaders with an efficient manner. We use the mean-field theory to characterize the process of information spreading based on the Susceptible Infected (SI) model and validate that the prevalence of information depends on the network density. Inspired by this result, we seek the initial spreaders from closely integrated groups of nodes, i.e., dense groups (DGs). In OSNs, DGs distribute dispersedly over the network, so our approach can be fulfilled in a distributed way by seeking the spreaders in each DG. We first design a DG Generating Algorithm to detect DGs, where nodes within the DG have more internal connections than external ones. Second, based on the detected DGs, we design a criterion to seek powerful initial spreaders from each DG. We conduct experiments as well as statistical analysis on real OSNs. The results show that our approach provides a satisfactory performance as well as computational efficiency.     

非标准情况下衰荡光谱的理论分析

本文研究了当激光脉冲线宽远大于被测吸收物质的吸收线宽时,衰荡光谱满足的规律,以及在这种情况下,测量灵敏度的大小。     

A Hierarchical 3D Graft Printed with Nanoink for Functional Craniofacial Bone Restoration

An ideal craniofacial bone repair graft shall not only focus on the repair ability but also the regeneration of natural architecture with occlusal loads-related function restoration. However, such functional bone tissue engineering scaffold has rarely been reported. Herein, a hierarchical 3D graft is proposed for rebuilding craniofacial bone with both natural structure and healthy biofunction reconstruction. Inspired by the bone healing process, an organic–inorganic nanoink with ultrasmall calcium phosphate oligomers and bone morphogenetic protein-2 incorporated is developed for spatiotemporal guidance of new bone. Based on such homogeneous nanoink, a biomimetic graft, including a cortical layer containing Haversian system, and a cancellous layer featured with triply periodic minimum surface macrostructures, is fabricated via projection-based 3D printing method, and the layers are loaded with distinct concentrations of bioactive factors for regenerating new bone with gradient density. The graft exhibits excellent osteogenic and angiogenic potential in vitro, and accelerates revascularization and reconstructs neo-bone with original morphology in vivo. Benefiting from such natural architecture, loading force is widely transferred with reduced stress concentration around the inserted dental implant. Taken from native physiochemical and structural cues, this wstudy provides a novel strategy for functional tissue engineering through designing function-oriented biomaterials.