AlGaN/GaN HEMT二维静态模型与模拟

考虑AlGaN/GaN材料的自发、压电极化效应和量子效应,通过泊松方程、薛定谔方程和流体力学方程组的数值自洽求解方法,对AlGaN/GaN HEMT的二维静态模型与模拟问题进行了研究,得到了器件区域的导带图、二维电子气分布、电子温度特性、直流输出和转移特性,并对模拟结果进行了分析与讨论.     

网络安全策略分析

网络安全策略是建立网络系统安全的指导原则。介绍了计算机网络当前所面临的安全威胁，对网络安全策略做了分析。     

离散Walsh-Haar变换的快速算法

Walsh-Haar函数系是一种具有良好的全局/局部性质的函数系,与其对应的离散变换是一种正交变换,有着广阔的应用前景。该文给出了离散Walsh-Haar变换及其逆变换的定义,并运用二分技术得到了离散Walsh-Haar变换的快速算法。文中的设计思想和方法可用于研究其它序的离散Walsh-Haar变换和其它的正交变换的快速算法。     

十运会IBC赛事共享系统的实时场记

本文首先简单介绍了IBC赛事共享系统的总体结构、各子系统以及系统流程,接着重点介绍了IBC赛事共享系统中的实时场记部分,并从应用的角度阐述了场记工作的流程及管理.     

基于ZMNL的雷达杂波仿真研究

杂波在雷达环境模拟中具有重要地位,文章利用零记忆非线性变换法(ZMNL),合理地设计了成形滤波器,对幅度和功率谱都服从一定分布的雷达杂波信号进行了仿真,并给出了有价值的仿真结果。     

光学和电子束曝光系统之间的匹配与混合光刻技术

介绍如何实现光学和电子束曝光系统之间的匹配和混合光刻的技术，包括：(1）光学曝光系统与电子束曝光系统的匹配技术；(2）投影光刻和JBX-5000LS混合曝光技术；(3）接触式光刻机和JBX-5000LS混合曝光技术；(4）大小束流混合曝光技术或大小光阑混合曝光技术；(5）电子束与光学曝光系统混合光刻对准标记制作技术. 该技术已成功地应用于纳米器件和集成电路的研制工作，实现了20nm线条曝光，研制成功了27nm CMOS器件；进行了50nm单电子器件的演试；并广泛地用于100nm化合物器件和其他微/纳米结构的制造.     

An improved electronic colon cleansing method for detection of colonic polyps by virtual colonoscopy

Electronic colon cleansing (ECC) aims to segment the colon lumen from a patient abdominal image acquired using an oral contrast agent for colonic material tagging, so that a virtual colon model can be constructed. Virtual colonoscopy (VC) provides fly-through navigation within the colon model, looking for polyps on the inner surface in a manner analogous to that of fiber optic colonoscopy. We have built an ECC pipeline for a commercial VC navigation system. In this paper, we present an improved ECC method. It is based on a partial-volume (PV) image-segmentation framework, which is derived using the well-established statistical expectation-maximization algorithm. The presented ECC method was evaluated by both visual inspection and computer-aided detection of polyps (CADpolyp) within the cleansed colon lumens obtained using 20 patient datasets. Compared to our previous ECC pipeline, which does not sufficiently consider the PV effect, the method presented in this paper demonstrates improved polyp detection by both visual judgment and CADpolyp measure.     

机载激光武器回顾与发展

鉴于美国对弹道导弹"多层防御"体系建设的日益重视,从发展历程、发展现状和未来规划三部分,详细介绍了作为弹道导弹"多层防御"体系重要组成部分的机载激光武器的研制进展情况,以期为读者提供机载激光武器过去、现在、将涞三方面全方位的发展信息,同时还分析了机载激光武器在研制过程中所遇到的包括技术实现和经费等在内的一些困难,希望对我国该领域的发展起到一定的参考作用.     

Nanoporous Copper with Tunable Nanoporosity for SERS Applications

Nanostructured materials with designable microstructure and controllable physical and chemical properties are highly desired for practical applications in nanotechnology. In this article, it is reported that nanoporous copper with a tunable nanopore size can be fabricated by controlling the dealloying process. The influence of acid concentration and etching potential on the formation of nanoprosity is systematically investigated. With optimal etching conditions, the nanopore sizes can be tailored from ～15 to ～120 nm by controlling the dealloying time. It is found that the tunable nanoporosity leads to significant improvements in surface‐enhanced Raman scattering (SERS) of nanoporous copper and peak values of SERS enhancements for both rhodamine 6G and crystal violet 10B molecules are observed at a pore size of ～30–50 nm. This study underscores the effect of complex three‐dimensional nanostructures on physical and chemical properties and is helpful in developing inexpensive SERS substrates for sensitive instrumentations in molecular diagnostics.     

基于TRIZ进化及复杂度对软件产品设计的研究

为了提高软件产品的质量、加快软件产品的开发速度以提高相关企业的竞争力,利用TRIZ(Theory of inventive problem solving)进化理论中的理想解、雷达图等问题分析工具和方法,对软件产品进行分析。阐述了TRIZ进化理论中的工具在软件产品设计中应用的方法,并提出在设计阶段对软件产品进行分析以降低其复杂度。最后以Akiva软件为例,结合软件复杂度的度量,证实TRIZ进化理论可用以辅助软件产品的开发。