高性能罗兰-C接收天线设计

为了提高罗兰-C磁天线的接收能力,设计了一种顺接串联多层线圈的磁天线。理论推导了顺接串联多层线圈磁天线的信噪比和灵敏度,最终设计的磁天线大小为150 mm×150 mm。远场测试接收到了较高信噪比的罗兰-C信号,在相同信号调理电路条件下,与单层单组线圈的磁天线相比,顺接串联多层线圈的磁天线接收到3.47 V的电压信号,且信噪比高达30.87 dB,灵敏度和信噪比分别提高了82.42%和63.20%。顺接串联多层线圈磁天线提高了罗兰-C磁天线的灵敏度和信噪比,对罗兰-C系统在定位方面的应用具有重要意义。     

Peptidyl Virus-Like Nanovesicles as Reconfigurable “Trojan Horse” for Targeted siRNA Delivery and Synergistic Inhibition of Cancer Cells

The self-assembly of peptidyl virus-like nanovesicles (pVLNs) composed of highly ordered peptide bilayer membranes that encapsulate the small interfering RNA (siRNA) is reported. The targeting and enzyme-responsive sequences on the bilayer's surface allow the pVLNs to enter cancer cells with high efficiency and control the release of genetic drugs in response to the subcellular environment. By transforming its structure in response to the highly expressed enzyme matrix metalloproteinase 7 (MMP-7) in cancer cells, it helps the siRNA escape from the lysosomes, resulting in a final silencing efficiency of 92%. Moreover, the pVLNs can serve as reconfigurable “Trojan horse” by transforming into membranes triggered by the MMP-7 and disrupting the cytoplasmic structure, thereby achieving synergistic anticancer effects and 96% cancer cell mortality with little damage to normal cells. The pVLNs benefit from their biocompatibility, targeting, and enzyme responsiveness, making them a promising platform for gene therapy and anticancer therapy.     

Implementation and evaluation of parallel FFT on Engineering and Scientific Computation Accelerator (ESCA) architecture

The fast Fourier transform (FFT) is a fundamental kernel of many computation-intensive scientific applications.This paper deals with an implementation of the FFT on the accelerator system,a heterogeneous multi-core architecture to accelerate computation-intensive parallel computing in scientific and engineering applications.The Engineering and Scientific Computation Accelerator (ESCA) consists of a control unit and a single instruction multiple data (SIMD) processing element (PE) array,in which PEs communicate with each other via a hierarchical two-level network-on-chip (NoC) with high bandwidth and low latency.We exploit the architecture features of ESCA to implement a parallel FFT algorithm efficiently.Experimental results show that both the proposed parallel FFT algorithm and the ESCA architecture are scalable.The 16-bit fixed-point parallel FFT performance of ESCA is compared with a published work to prove the superiority of the mapping algorithm and the hardware architecture.The floating-point parallel FFT performances of ESCA are evaluated and compared with those of the IBM Cell processor and GPU to demonstrate the computing power of the ESCA system for high performance applications.     

嵌入式系统芯片的软硬件协同仿真环境设计

针对嵌入式系统芯片SoC开发验证阶段的需求,介绍了一种通用的SoC软硬件协同仿真平台。软件仿真由C／C＋＋和汇编语言编写,硬件仿真基于VMM验证方法学所搭建,SoC设计代码由RTL代码编写而成。将SoC设计代码中的ARM由DSM模型替代,通过VCS编译器将软硬件协同起来进行信息交互,实现一种速度快、真实性高、调试方便的...     

主动连接的广播教学解决方案

同一VLAN下的2个物理机房,其中一个机房在使用广播软件教学时会对另一个机房产生干扰,并且学生接受教师屏幕时是被动模式．该文介绍了一种使用VNC远程控制软件,实现学生主动连接教师机并且在2个物理机房同时教学时不产生广播教学干扰的方法     

基于工作岗位的Linux课程教学体系构建与实践

Linux课程是高职计算机网络类专业的一门专业课程,具有较强的理论性和实践性。如何使学生既能掌握Linux的基本概念和基本技能,又能熟练的应用与实际工作,教学体系的构建至关重要。高职院校是培养应用型人才的基地,必须改革传统的教学体系,构建基于工作岗位的课程教学体系,培养高水平的Linux应用型人才。     

WindowsCE.NET中断延迟测试与分析

嵌入式系统对实时性能一般要求较高,中断延迟是评估嵌入式操作系统实时性能的重要指标。利用ILTiming测试工具对WinCE4.2和5.0进行中断延迟测量,分析了导致中断延迟的原因,同时针对PXA255处理器的BSP提出了测试WindowsCE系统中断延迟的方法。     

基于PE文件资源数据的信息隐藏方案

研究PE图标和位图资源存储格式及其特点,提出基于PE资源数据的信息隐藏方案。该方案利用PE文件的隐蔽性,采用有效的信息隐藏算法将秘密信息嵌入到PE资源数据中,提高信息隐藏的安全性和隐藏容量。针对PE图标和位图特点,提出一种新的调色板冗余颜色分配算法,提高基于调色板颜色冗余隐藏算法的嵌入量。     

卫星通信系统QOS管理的策略提炼

针对基于策略的DVB—RCS卫星通信系统服务质量管理,提出一种策略提炼模型,结合实例给出目标提炼过程。该模型以线性时态逻辑为基础,在提炼模式的辅助下从高层目标中提取出低层策略,可以有效保证策略提炼过程的正确性、合理性及一致性。在系统设计阶段,该模型用于指导系统功能规划与设计,在系统运行阶段,该模型为网络管理人员提供高层策略向系统设备行为的映射方法。